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Vacuum Heat Treatment Furnace - The best Vacuum Heat Treatment Kilns from Luwei Vacuum Furnace.

Description of Vacuum Heat Treatment Furnace

A vacuum furnace is a type of furnace in which the product in the furnace is surrounded by a vacuum during processing. The absence of air or other gases prevents oxidation, heat loss from the product through convection, and removes a source of contamination.

Vacuum Technology is the Basis for Process Innovation in Heat Treatment. Vacuum Heat Treatment Furnace is the process in which metallic/steel parts are exposed completely or partially to time-temperature sequences in order to change the mechanical and/or corrosion properties. Modern, precise, energy efficient and ecological vacuum heat treatment equipment with guaranteed technology.

Features of Vacuum Heat Treatment Furnace

Vacuum Heat Treatment Furnace 1700°C can be used for numerous purposes because they apply vacuum as well as inert atmospheres. This main application is debinding and subsequent sintering of ceramics or powder metallurgical parts.


Tilting Furnace Brown Fused Alumina

In order to meet the demands of the refractory industry, we independently develop and produce the Tilting Furnace Brown Fused Alumina which is adopted by modern unique technology of smelting and processing under the universities and research institutes' support.

Tilting Furnace Brown Fused Alumina is characterized by high purity, good crystal, strong fluidity, low coefficient of linear expansion, good corrosion-resistance and so on. After practical tests by dozens of refractory manufacturers. Tilting Furnace Brown Fused Alumina can't burst, pulverise and craze in using course. In particular, Tilting Furnace Brown Fused Alumina performance-cost ratio is much higher than traditional Brown Fused Alumina, and Tilting Furnace Brown Fused Alumina become the best aggregate and padding of Brown Fused Alumina refractory materials.


Annealing Furnace - The best Annealing Oven from Luwei Annealing Furnaces.

Description of Annealing Furnace
Annealing Furnace is a process used in semiconductor device fabrication which consist of heating multiple semiconductor wafers in order to affect their electrical properties. Heat treatments are designed for different effects. Annealing Furnaces may be integrated into other furnace processing steps, such as oxidations, or may be processed on their own. Furnace anneals are performed by equipment especially built to heat semiconductor wafers. Furnaces are capable of processing lots of wafers at a time but each process can last between several hours and a day.

Annealing Furance designs can be stationary, moving or continous, are a few examples. Annealing is applied to both ferrous and non-ferrous metals, and is intended to reduce the strength and hardness of the product while increasing the ductility. Annealing Furnace features heating elements in ceramic fibre insulation, providing a maximum temperature of 1100°C in the furnace’s vacuum tight chamber.

Features of Annealing Furnace
An Annealing Furnace is a piece of equipment used to heat a material at very high temperatures, to change its hardness and strength properties. Annealing is commonly associated with the manufacture of steel, to relieve internal stresses that may lead to failure in service and to produce a more uniform, or homogeneous, internal structure. 1200°C degree 1600°C degree metal or ceramics heat treatment furnace Annealing Furnace is welded by steel and profiled steel; furnace chamber is ceramic fiber and high quality electric resistance wire/SiC heaters, which can save 40% energy than brick furnace chamber. Car Bottom Furnace is mainly used for annealing, normalizing and stress relieving of bars and tubes, forgings, large weldments and castings.

Brown Fused Alumina Sandblasting

Brown Fused Alumina is fused in the electric-arc furnace under the high temperature of above 2250°C with high quality abrasive bauxite as raw material and matched by the carbon material and scrap iron. The degree of refractory is more than 1850°C.

Sand blasting is an operation method that uses compressed air to spray brown corundum sand through the blasting equipment at a high speed to the surface of the workpiece to be processed to increase its roughness, thereby enhancing the adhesion between the workpiece and the paint.

Brown Fused Alumina for Sandblasting is mainly used for various material workpieces to decontaminate, derusting, prevent corroslon, remove oxide skin, light-decorate, process pattern effect and so on. About Brown Fused Alumina for Sandblasting there are three factors the decide the effect of Brown Fused Alumina for sandblasting:
1. The grinding ability: the higher grinding ability, the better for sandblasting.
2. The bulk density: the higher bulk density, the better for sandblasting.
3. The dust: the lower dust, the better for sandblasting.

Brown fused alumina sandblasting features high grinding force, high bulk density and low dust. Brown Fused Alumina with high bulk density and air cleaned, the quality of this kind of Brown Fused Alumina is very excellent for sandblasting.


Brown Fused Alumina High/Middle Bulk Density Air Cleaned Grains

Brown Fused Alumina is made of high-quality bauxite as raw material, anthracite and iron filings. It is made by arc smelting at 2000°C or higher temperature. It is crushed and plasticized by self-grinding machine, magnetically deferred to iron, sieved into various sizes, and its texture is dense and hard. High, spherical pellets, suitable for the production of ceramic, high-resistance abrasive resin and grinding, polishing, sandblasting, precision casting, etc., can also be used to manufacture high-grade refractories.

There are two ways to improve product cleanliness:
The first is to use high-power dry cleaning machines to clean F54 crude products. The machine consists of a blower and an induced draft fan. When the material enters the dry-cleaning machine, the blower is adjusted to the proper air volume to allow the material to jump up and down in the machine room, and the fine dust in the product is separated from the wood chips in the material by friction and collision between the materials; The rear induced draft fan introduces dust and wood chips with relatively light material and relatively small particles into the dust removal equipment. The cleanliness reaches over 98%.

Second, the adjustment of dry-cleaning equipment is mainly used to produce products with less than F60. Because F60 is a fine-grained product, air heating is used to eliminate static electricity and moisture to ensure the quality of dry-clean abrasive products.

The use of Brown Fused Alumina:
1. Sandblasting - abrasive medium hardness, high packing density, no free silica, a large specific gravity, good toughness, widely used in aluminum, copper profile glass, washed denim precision molds and other fields;

2. Free grinding - Grinding grade abrasives, used in kinescopes, optical glass, monocrystalline silicon, lenses, watches with glass, crystal glass, jade and other fields;

3. Resin Abrasives - Suitable for abrasives, good hardness, toughness, suitable particle cross-section type and edge retention, applied to resin abrasives, ideal results;

4. Coated Abrasives - Abrasives are raw materials for sandpaper, gauze and other manufacturers;

5. Functional fillers - mainly used for automotive brake parts, special tires, special construction products and other collar can be used as construction of highway pavement, airstrips, piers, parking lots, industrial floors, sports grounds and other wear-resistant materials;

6. Filter media - is a new type of abrasive applications, the use of granular abrasive as the bottom media of the filter bed, purification of drinking water or wastewater, is a new type of water filter material at home and abroad, especially for non-ferrous metal processing;

7.Hydraulic cutting——It is a new type, environmental protection and safe cutting method that uses abrasive as cutting medium and high-pressure hydraulic jets for basic cutting. It is applied to the cutting of petroleum (natural gas) pipelines, steel and other parts.


Sintering Furnace - The best Sintering Oven from Luwei Sintering Kiln Manufacturer.

Description of Sintering Furnace
Sintering is the process of compacting and forming a solid mass of material by heat or pressure without melting it to the point of liquefaction. Sintering happens naturally in mineral deposits or as a manufacturing process used with metals, ceramics, plastics, and other materials. Luwei Furnace Company designs and builds Sintering Furnaces around our clients’ manufacturing needs – the time, temperature and atmosphere requirements for their specific product manufacturing process.

Sintering Furnaces is mainly for laboratory industrial and mining enterprises scientific research units for element analysis, and measured small size steel hardening, annealing, tempering of heat treatment for heatingfurnaces. Sintering Kilns can also be used as a metalceramic sintering dissolution and analysis of high heating use.

Features of Sintering Furnace
Sintering Furnaces is High purity alumina fiber insulation and Morgan materials brick PID automatic control via SCR (Silicon Controlled Rectifier), power control with phase angle fired current limiting resistor and 16 programmable segments for precise control of heating rate.


Vice White Fused Alumina

Vice White Fused Alumina is developed on the basis of brown fused alumina smelting. The Vice White Fused Alumina can substitute compact Fused Alumina to make tapping launder castable refractory.

Vice White Fused Alumina can also substitute white fused alumina and tabular Alumina to make sliding plate, corundum bricks and abrasion-resistant castable etc. All of which have achieved the same effectiveness compare with usingcompact fused alumina and white fused alumina.

Vice White Fused Alumina has the hardness of White Fused Alumina, and it also has the toughness of brown corundum. It is used to replace the iron grate castable made from dense corundum, as well as the skateboards, corundum bricks, wear-resistant castables, etc. that are made by replacing white corundum and plate corundum. Acquire and use dense corundum, white corundum and other equivalent effects.

The Vice White Fused Alumina Segment sand, and Vice White Fused Alumina Powder have the characteristics of no bursting, no chalking, large stacking, and good fluidity during use, and can be widely used to produce a variety of shaped refractory products and corundum casting materials and other amorphous bulk materials and light fired corundum refractory products.


Ceramic Roller Kilns - The best Ceramic Roller Kiln from Luwei Ceramic Roller Furnace.

Description of Ceramic Roller Kilns
Ceramic Roller Kilns for fast firing of wall and floor tiles have been used for nearly 25 years. In this type of kiln the products to be fired are transported through the kiln by means of rotating ceramic rollers. Ceramic Roller Kilns is manufactured using optimum grade raw material and sophisticated technology in synchronization with international standards. In order to ensure quality, the entire range is rigorously tested on various parameters by our quality controllers.

The Ceramic Roller Kilns offers the manufacturer a fuel efficient solution where cycles are fast and products require a very tight temperature uniformity. For special technical applications, Nutec Bickley have provided roller hearth kilns as an alternative to shuttle or tunnel kilns. Ceramics rollers are supplied in different materials (mullite or silicon carbide) depending on the application requirements.

Features of Ceramic Roller Kilns
The Ceramic Roller Kilns is mainly used in the production of ceramic tiles table dishware bone teaset pottery bowls ceramic gifts and other ceramic building materials. Ceramic Roller Kiln is continuous heating and work it is made by the rotation of the ceramic tube as the roller kiln vehicle the ceramic tiles or bricks materials in the kiln inner chamber. The rotation of the ceramic tube with high temperature(high-alumina)or SiC depending on the calcination temperature and ar driven by independent controller.


Brown Fused Alumina Micro Powder

Brown Fused Alumina is made of high-quality bauxite as the main raw material, and it is made into various particle size products by adopting processing methods such as purification, impurity removal, crystallization, sorting, crushing, magnetic separation, and sieving in the high temperature above 2200°C of the arc smelting furnace.

Brown Fused Alumina Powder is made of natural bauxite as raw material, carbon (mainly coke) as reducing agent, and iron scrap is added as settling agent (clarifier) ​​to form ferrosilicon at the bottom of electric furnace.

Brown Fused Alumina Micro Powder is tan, generally Al2O3 ≥ 94.5%, SiO2 ≤ 3.5%, TiO2 ≤ 3.5%, Fe2O3 ≤ 1%. The mineral composition is dominated by α-Al2O3. The central part of the crystal shape is diamond-shaped, thick plate-shaped, and cracked particles. There are more silicon oxide and calcium oxide in the periphery and melt crystallize, showing a long plate shape and the most coarse grains. Slit platelets.

Since the impurities have not been completely removed, the brown fused alumina also contains secondary phases such as calcium hexaaluminate, calcium plagioclase, spinel, rutile, and glass phases, ferroalloys, and solid solutions. The color of Brown Fused Alumina depends to a large extent on the titanium oxide remaining in the product.

Brown Fused Alumina Micro Powder performance include High hardness, high strength, impact resistance, high temperature resistance, oxidation resistance, corrosion resistance, low creep, etc.

Brown Fused Alumina is mainly used as abrasive. In recent years, it has been used as the raw material for large and medium-sized blast furnace cast iron hook castables and cast iron aggregates and for the production of common corundum bricks (including high-alumina silicon carbide casts).

Brown Fused Alumina Micro Powder is suitable for making bonded and coated abrasive tools, wet or dry blasting, superprecision grinding and polishing, making high quality refractory materials, grinding carbon steel, alloy steel, malleable cast iron, hard bronze and semi-conductor materials.


The role of Fused Cast AZS Bricks in Glass Furnaces

For a glass kiln, Fused Cast AZS Bricks effect in galss furnace is very important, in order to achieve the design life or to avoid contamination of the glass solution, a thorough understanding of the appearance quality and intrinsic quality of the fused cast bricks is required. we need to understand the performance of the fused cast azs bricks and the weak points of the fused cast bricks.

First, the appearance quality of Fused Cast AZS Bricks in Glass Furnaces, the pool wall part of the corner brick, kiln chopped brick, bubbling bricks, liquid flow brick is generally fused cast azs 41#. With the neighboring brick assembly gap to be strict requirements, the gap assembly to speed up the glass solution on the brick erosion, assembly The gap requirement is not more than 0.5mm. It is advisable that there is no shrinkage hole at the bottom of the brick. More than twelve per cubic meter of surface air holes above the ¢2mm are not allowed. The color of the brick body is yellowish and white, bubbling, and liquid flow bricks are not allowed. The presence of cracks does not allow the presence of flaws within 300 mm of the top of the pool wall section.

Second, the intrinsic quality of Fused Cast AZS Bricks in Glass Furnaces.
1. From the brick color to determine the impurities in the fused cast brick, or to determine whether the carbon content is large, the color of the large carbon brick will be green, this brick is strictly prohibited.
2. While a massive greening on the surface of the brick body, there must be iron blocks inside. The iron blocks come from the flat material in the production process or the iron and solder part of the exhaust gas falls off, and other factors. This imagined brick is also prohibited.
3. The glass phase contrast must be strictly controlled. When the glass phase exceeds the standard, the large amount of glass phase precipitated at high temperatures can reduce the service life of the furnace and contaminate the glass melt.


Brown Fused Alumina Melt Film Precision Casting Sand

Brown fused alumina melt film precision casting sand is the latest corundum products self-developed by Yushi Company to meet the market demands. Based on the production of the brown fused alumina and with special technology, Brown fused alumina melt film precision casting sand is produced by the careful organization of the researchers.

The quality of Brown fused alumina melt film precision casting sand has reached the advanced level of similar foreign products through laboratory tests and production in practice of dozens of casting enterprises. And some performances of Brown fused alumina melt film precision casting sand can be adjusted or showcased according to the customers' requirement.

The Brown fused alumina melt film precision casting sand has high refractoriness, low thermal expansion coefficient, good thermal stability, strong air permeability and high intensity, easy to shell, high casting finish. It can substitute Zirconia sand (powder) its price is only half of zirconia sand (powder), and the recovery ratio is high as well.

Brown fused alumina melt film precision casting sand can be mainly applied to the melt films and silicasol technology of jewelry, handicrafts, stainless steel products, watches, glasses, aluminum die casting industries, and can be processed in line with the demands of the clients.


Pusher Kilns - The best Pusher kiln from Luwei Ceramic Pusher kilns.

Description of Pusher Kilns
Pusher Kilns and tunnel kilns are ideal for processes requiring precise control of temperature and atmosphere, for those with longer residence times that require exact control of the heat up rate of the product (temperature profile), and those with a lower gas/solid reaction.

The Pusher Kiln has a hydraulic system that pushes load trays (ceramic or metal) through the kiln tunnel. The trays may push through various zones of temperature to meet a particular temperature profile. For larger load sizes, more than one tray may be pushed in at a time. When the trays reach the exit end of the kiln, they may be manually or automatically returned to the entrance end for reloading. As in the Car Kiln, the entire process can be automated to be safer and more efficient.

Features of Pusher Kilns
Pusher Kilns is mainly used in the production of ceramic tiles table dishware bone teaset pottery bowls ceramic gifts and other ceramic building materials. Pusher Kiln is continuous heating and work it is made by the rotation of the ceramic tube as the roller kiln vehicle the ceramic tiles or bricks materials in the kiln inner chamber.


Selection of Fused Zirconium Corundum Bricks in Furnaces

In recent years, with the digestion and absorption of imported technologies, the technical progress of kiln furnaces has continuously increased the quality requirements of tilt-casting fused zirconia corundum bricks, and the usage has been continuously expanded. As a manufacturing factory, the production technology of inclined cast bricks has been updated and improved, making the product quality a relatively large step, basically reaching the international advanced level of similar products.

The demand for non-shrinkable fused zirconia corundum bricks has been increasing in recent years, with the exception that 41# fused zirconia corundum bricks are almost completely free of shrinkage casting, and oxidizing method 33# is not required for crater-free fused zirconia corundum bricks. There has also been a considerable increase in usage. The production cost of this product is high and the production process is more complicated, so the selling price of the product is higher. In recent years there have also been glass melting furnaces using dense-end cast bricks, which are used in the pool wall area.

The basic principles for the rational selection of fused zirconia corundum bricks:
(1) The wall bricks in contact with the glass melt are oxidized with a 33 # tilted cast zirconia corundum brick. This choice is technically and economically reasonable.
(2) Almost all of the upper structure of the melting furnace can be normally fused cast zirconia corundum bricks, and its function is fully enough.
(3) For the furnace with kiln bottom insulation, the 75mm-thick oxidizing method with 33# non-shrinkage AZS bricks is most suitable for the kiln floor surface, and it is used in combination with the zirconium corundum ramming material.
(4) The side walls, flat borings and inclined rakes of small furnaces are generally made of 33 # zirconia corundum bricks with common casting reduction method, and the bottom of the furnace can also be made of 33 # zirconia corundum bricks without shrinkage or dense casting.
(5) The wall of the clarification department is preferably made of ordinary cast α-β alumina bricks, and the kiln bottom is preferably made of α-β alumina bricks without shrinkage casting. The cost of such selected furnaces is higher and can also be used. Oxidation method 33 # AZS brick instead.


Green Silicon Carbide - The best Silicon Carbide Black from China YuShi

Green Silicon Carbide (SiC) is an extremely hard (Mohs 9.4 / 2600 Knoop) man made mineral that possesses high thermal conductivity and high strength at elevated temperatures (at 1000°C, SiC is 7.5 times stronger than Al2O3).

Green SiC is made from Silica sand and coke, and is extremely pure. Hexagonally shaped, it breaks into very sharp particles. Green SiC is harder than black, coming in at a 9.4 Mohs and 2600 on the Knoop scale.

Green Silicon Carbide is produced in electrical internal resistance furnaces from very high purity silica sand and petroleum coke.

Description of Green Silicon Carbide

Green silicon carbide is produced as the same type as the black silicon carbide, except the different raw materials. Its crystallization has higher purity and hardness.

Green silicon carbide is suitable for processing hard alloy, metallic and non-metallic materials with hard and brittle feature such as copper, brass, aluminum, magnesium, jewel, optical glass, ceramics etc. Super micropower of it is also a kind of ceramics material.


Rotary Kilns - The best Rotary Furnace from Luwei Rotary Kiln Manufacturers.

Description of Rotary kilns
A Rotary Kilns is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process. As the kiln rotates, material gradually moves down towards the lower end, and may undergo a certain amount of stirring and mixing.

Rotary kilns work by processing material in a rotating drum at high temperatures for a specified retention time to cause a physical change or chemical reaction in the material being processed. Rotary Kilns — rotating industrial drying ovens — are used for a wide variety of applications including processing raw minerals and feedstocks as well as heat-treating hazardous wastes.

Features of Rotary kilns
Rotary Kiln / Furnace is mainly used for metallurgical industry, iron and steel plant iron ore roasting, chromium, nickel ore roasting, refractory plant roasting high bauxite ore and aluminum roasting clinker, aluminum hydroxide, chemical plant roasting chrome ore and chrome powder minerals.


Black Silicon Carbide - The best Silicon Carbide Black from China YuShi

Black Silicon Carbide (SiC) is a semi-friable abrasive often used for general abrasive applications in bonded abrasive tools, lapping, polishing, tock tumbling, glass etching and frosting.

Black Silicon Carbide is produced in electrical internal resistance furnaces from high purity silica sand and petroleum coke.

Black SiC is typically used on hard or brittle materials. It is also used for kiln furniture, lapping and polishing, non-woven, tumbling, pressure blasting, anti-skid, electrical heating elements, aerospace, composites, etc.

Black silicon carbide (SiC) is a semi-friable abrasive often used for general abrasive applications in bonded abrasive tools, lapping, polishing, tock tumbling, glass etching and frosting. Black Silicon Carbide grains for bonded applications. Used in the manufacture of grinding wheels, polishing blocks, rubbing bricks, honing sticks, foundry fluxes, rice and dal-mill, shellers, for abrasive blasting, lapping, cutting and polishing of gems and granite, antiskid surfacing and other general purpose applications.

Black silicon carbide is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke as its main raw materials. It is used for making bonded and coated abrasive tools, grinding metal and non-metal materials of lower tensile strength, such as gray cast iron yellow bronze, aluminum, stone, leather, rubber, etc.


Bogie Hearth Furnaces - The best Bogie Hearth Kilns from Luwei Bogie Hearth Furnace.

Description of Bogie Hearth Furnace
Trolley type Bogie Hearth Annealing Furnace is also called as shuttle furnacecar, bottom furnace and pottery kiln in china. Welded by steel and profiled steel and chamber is high purity ceramic fiber plates and high quality electric resistance wire. Bogie Hearth Furnaces are usually provided with one only sliding type front door for batch loading and unloading.

For annealing and hardening of larger parts, for example heavy cast parts or tool steel dies to temperatures between 800°C and 1100°C, we recommend our bogie hearth furnaces with radiation heating. Bogie Hearth Furnaces are lined with ceramic fibre modules/blankets on the side wall, roof and door and hearth of the furnace will be provided with combination of high/medium grade aluminium bricks backed-up by insulation bricks to minimize the skin temperature.

Features of Car Bottom Furnace
Bogie Hearth Furnace is often used for heat treatment such as tempering, annealing, soft annealing, normalizing, stress relieving, homogenizing and recrystallization. The chamber of the Bogie Hearth Furnace is insulated with high temperature fiber insulation and mineral wool. The elements are assembled on the sidewalls of the chamber furnace to achieve a high temperature accuracy and easy maintenance.


Recycling of waste refractories in the glass industry

The European glass industry uses more than 100,000 tons per year on kilns with a service life of 5 to 8 years. The dismantling of these kilns will generate thousands of tons of discarded refractories, most of which will be sent to the Technical Stacking Center (CET) or proprietary dumps.Fused Cast AZS Bricks

At present, 30% to 35% of the silica bricks removed after the kiln has been used can be reused to make two kinds of silica bricks, including the silicon wedge bricks and lightweight thermal insulation used in the working pool or regenerator roof. Silicon bricks. The former European factory that recycles and reuses refractory materials is specialized in the treatment of waste refractories from the glass industry, iron and steel industry, incinerators and chemical industry, and the recovery rate reaches 90%.

A glass company cuts the wall of the kiln's melting pool as a whole, succeeded in using the effective part of the pool wall, and removed the glass adhered on the surface of the used AZS brick, and cracked the brick with a method of quenching, broken and grinded. After screening, different size aggregates and fines are obtained to produce cheap high-performance castables and iron channels.


Black Fused Aluminum - The best Black Fused Aluminum Oxide Abrasives from China YuShi

Black Fused Alumina, also called Black Fused Aluminium Oxide, Black Aluminum Oxide, is a black color artificial corundum for abrasives.

Black Fused Alumina Abrasives is mostly used in grinding and polishing stainless steel, metal works, optical glass, bamboo or articles.

Black Fused Aluminium Oxide has moderate hardness, less heat during abrasives, good strength and can be used for sand blasting, polishing, grinding of stainless steel and other non-metal surfaces

Description of Black Fused Aluminum Abrasives
Most of Black fused alumina is made in China, which is also known as low aluminum corundum. It is a dark gray crystal, melted in electric arc furnaces by using the bauxite as its raw material. Black fused alumina is characterized by low Al2O3 and a certain amount of Fe2O3 (10% more or less) content, so it has characteristics of moderate hardness, high toughness, high temperature resistance, and high thermal stability.

Black Fused Alumina is also known as low aluminum corundum. (Al2O3) content is 70% ~ 80%, containing more silicon oxide and titanium oxide impurities, It is also a new type product of polishing material, and it is a dark gray crystal body made αAl2O3 and ferropicotite as main ore in the electric arc furnace by smelting the bauxite.

Black Fused Alumina has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. and it is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products.


Tunnel Kilns - The best Tunnel Kiln from Luwei Tunnel Kilns.

Description of Tunnel Kilns
Luwei Tunnel Furnace Technologies offers Tunnel Kilns specifically designed for the elaboration and optimization of thin film photovoltaic absorbers, Our Tunnel Kilns technology is based on innovative and flexible software-controlled single-substrate RTP/evaporation processes dedicated to the atmospheric-pressure selenization, sulphurisation, crystallization, etc.

The Tunnel Kilns maintains and equalizes the temperature of the slabs arriving from the caster and delivers them to the rolling mill. The Tunnel furnace provides a buffer of up to six hot slabs, available for rolling when the mill is ready, and The Tunnel Kilns are roughly 675-foot long, divided into 11 zones. Natural gas burners maintain a temperature of 1800° F - 2100° F in the fired zones. A door at the rolling mill exit end of the furnace prevents heat losses, opening when it is time to roll a slab.

Features of Tunnel Kilns
Tunnel Furnace steel bar heat treatment systems have fully integrated hardening, quenching and tempering for high volume and continuous production up to 9 metric tons/hr (20,000 lbs/hr).


Brown Fused Aluminum - The best Brown Fused Aluminum Oxide Abrasives from China YuShi

Brown fused Alumina is mainly used as a recyclable abrasive in blast cabinets and blast rooms. Because of Brown fused Alumina low iron content, alumina is often used in blasting operations where iron contamination on the non-ferrous metal substrate is not allowed.

Aluminium oxide is a very hard and sharp abrasive that cleans rapidly. It leaves an anchor profile prior to coating and is suitable for removal of scale, rust and old coatings. Furthermore it is used for ceramic grinding wheels, refractory applications and polishing and grinding.

Brown fused alumina is produced from bauxite, charcoal, iron chip by being fused under high temperature in an electric arc furnace. It is characterized by high toughness and has a micro hardness of 2000-2200kg/mm2. The Abrasive tools made by brown fused alumina are suitable for grinding carbon steel, normal alloy steel, malleable cast iron and hard bronze, etc. Brown fused alumina can also be used for making fine quality refractory etc.

Brown Fused Alumina is a tough, sharp abrasives which is highly suitable for grinding metals of high tensile strength. Brown fused Alumina thermal properties make it an excellent material for use in the manufacture of refractory products. This material is also used in other applications like blasting and surface hardening.


Shuttle Kiln - The best Shuttle Kilns from Luwei Shuttle Furnace.

Description of Shuttle Kilns
If you need to heat process ceramics, metals or glass in various ways and require flexible production schedules, or different cycles to different temperatures, then a Carbottom/Shuttle Kiln may be the best choice for your application. Luwei furnace’s Shuttle Kilns define batch firing for the ceramic industry. The kilns come in a wide range of capacities and with a choice of door, combustion system, and control designs.

A Shuttle Kiln is a car-bottom kiln with a door on one or both ends. Burners are positioned top and bottom on each side, creating a turbulent circular air flow. This type of kiln is generally a multi-car design and is used for processing whitewares, technical ceramics, and refractories in batches. A Shuttle Kiln derives its name from the fact that kiln cars can enter a shuttle kiln from either end of the kiln for processing, whereas a tunnel kiln has flow in only one direction.

Features of Shuttle Kilns
Ceramic Electric Shuttle Kiln with trolley is also called as shuttle furnacecar bottom furnace and pottery kiln in china. Welded by steel and profiled steel and chamber is high purity ceramic fiber plates and high quality electric resistance wire.


Pink Fused Aluminum - The best Pink Fused Aluminum Oxide Abrasives from China YuShi

Pink Fused Aluminum Oxide contains chromium oxide, which gives the material its pink color. The incorporation of the Cr2O3 into the Al2O3 crystal lattice produces a slight increase in toughness and a reduced friability compared with White Fused Alumina.

Pink Fused Alumina is produced by doping Chromia into Alumina, which gives the material pink color. The incorporation of the Cr2O3 into the AI2O3 crystal lattice produces a slight increase in toughness and a reduced friability compared with white Fused Alumina.

Description of Pink Fused Aluminum Abrasives
Pink Fused Alumina and Ruby Fused Alumina is produced by adding chromium oxide to high purity aluminum oxide during the fusion process. The amount of chromium oxide added affects the color of the final product, as well as the toughness of the grain. With increased additions of chromium oxide, the toughness of the grain increases. Compared to Brown Regular Aluminum Oxide the Pink material is harder, more aggressive and has better cutting ability. The grain shape of Pink Aluminum Oxide is sharp and angular.

Pink Fused Alumina is White Fused Alumina with chrome oxide (under 0.5% Cr2O3) has been added in the fusion process to produce a grain that is slightly tougher than regular white fused alumina used for grinding unhardened high alloy steels. If more chrome oxide (about 3% Cr2O3) has been added to, it will get Ruby Fused Alumina, which provides additional toughness over pink fused alumina.

The raw material and refining work of pink aluminum oxide are basically the same as white aluminum oxide. They are both needed to add Cr203 and well mixed to be refined as abrasives with rose red color. Its hardness is close to white corundum, and the roughness is higher than white aluminum oxide. It is suitable for grinding knifes, measuring tools, meters, screw etc. that require low roughness.


Continuous Mesh Belt Furnaces - Mesh Belt Furnace for Continuous Heat Treatment Applications.

Description of Continuous Mesh Belt Furnace
Luwei Furnace supplies the Continuous Mesh Belt Furnace is mainly used in the production of ceramic tiles table dishware bone teaset pottery bowls ceramic gifts and other ceramic building materials. Continuous Mesh Belt Furnaces are capable of achieving numerous metallurgical processes, including bright annealing, brazing, process curing, sintering, stress relieving, and tempering.

Luwei Furnace is the industry leader for the supply of Continuous Mesh Belt Furnace Systems. Continuous Mesh Belt Furnace can be attributed to continuous design innovation which changed the industry and continues today.

Features of Continuous Mesh Belt Furnace
The Continuous Mesh Belt Furnace directly heating by the electric heating tube with internal hot air mixing. Heating tunnel include the furnace bodyelectric heating tubehot air mixing motorconveying systerm and the electrical control systerm. The top have the airoutlet port through the valve to adjust exhaust gas out. The heating tube at both side of the belt up and down which can ensure the fast heating and good heating effect.


Refractory industry may usher in changes

Controlling new production capacity, encouraging equal or reduced replacement, relying on existing refractory material production enterprises, carrying out technological transformation through joint reorganization, advancing energy conservation and emission reduction, and producing and promoting monolithic refractories, optimizing industrial structure, and increasing production concentration. degree. World heritage sites, scenic spots, ecological protection zones, drinking water source protection zones and other areas that need special protection and non-industrial construction planning zones may not be built or expanded.Fused Cast AZS Bricks

The raw material storage yard is equipped with walls and roofs, broken (powder) crushed, sieved, homogenized, transported, formed and processed into dust-prone processes, and dust collection devices are provided to prevent fugitive emissions of dust. Dust-laden gas is discharged after reaching the standard.

Supporting the construction of kiln flue gas dust removal, desulfurization, denitrification and other treatment devices. The reuse rate of the production process wastewater shall not be less than 90%, and the sewage shall be discharged after the treatment reaches the standard. Adopt cleaner production technologies and carry out cleaner production audits in accordance with the law. Establish an environmental management system and formulate emergency plans for emergency environmental incidents.

In respect of energy saving, consumption reduction and comprehensive utilization, the “Code” requires that the solid wastes such as crushing, fines, and dust recovered from the production process be recycled and reused, and the use of recycled refractories be encouraged. Refractory material enterprises that consume 5,000 tons of standard coal and above should submit their own energy utilization status report regularly to provide reliable energy consumption data according to the requirements of the local industrial energy conservation management department.

White Fused Aluminum - The best White Fused Aluminum Oxide Abrasives from China YuShi

White Fused Alumina Abrasives is classified to exacting standards for various applications where higher purity levels and reduced iron content are required.

White Fused Alumina is produced by fusing calcined alumina. It is white in colour, a dense mineral and has predominantly large crystals of Alpha Alumina.

White Fused Alumina belongs to the group of electro-corundum. It is produced by controlled melting of alumina in an electric arc furnace. White fused alumina is iron-free, ultra pure and extremely hard.

Description of White Fused Aluminum Abrasives
White fused alumina is fused by alumina powder by electric arc furnace under high temperature. It has white color and little higher hardness and lower toughness comparing with brown fused alumina. The micro hardness of the product is 2200-2300kg/mm2. White fused alumina has higher hardness and slight lower toughness comparing with brown fused alumina. White fused alumina is also characterized by its high purity, acid and alkali resistance, good thermal stability. It’s the high grade refractory materials.

Applications of White Fused Aluminum Abrasives
Dedicated lines produce products for different applications. White Fused Alumina is highly friable and hence used in Vitrified Bonded Abrasives products where cool, fast cutting action is essential and also in the manufacture of high purity Alumina refractories. Other applications include use in Coated Abrasives, Surface treatment, Ceramic Tiles, Anti-Skid Paints, Fluidized Bed Furnaces and Skin / Dental Care.