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The best Vacuum Sintering Furnace by Luwei Furnace

Sintering is a process required for many different parts and applications, including powder metallurgy, metal injection molding (MIM) and 3D printing components of various types or beading applications including abrasives.

High Temperature Vacuum Sintering Furnace is used in Sm-Co, AlNiCo, metal mesh, cemented carbide, ceramic materials, photoelectric coating materials, graphite purification, magnet material and rare refractory metals, alloys (tungsten, Mo, W-Cu alloy) vacuum sintering process, also support atmosphere sintering. Max temperature could be achieve 2200C. This equipment was based on international excellent equipment technology, after many times improvement.

Vacuum Sintering Furnace
Brand Name: Luwei
Model: Vacuum Sintering Furnace
Max.Temperature: 2000°C
Working Temperature: 2000°C
Furnace Chamber Size: 200*200*200MM
Temperature Controller: PID and SCR
Control Accuray: ± 1°C
Heating Element: Graphite
Thermocouple: Tungsten-rhenium
Chamber Material: High purity Ceramic fiber

The control system of Vacuum Sintering Furnace was controlled by PLC, temperature was controlled by intelligent temp controller, accurate control, high automation. User can choose auto or manual undisturbed switching to operate it, this furnace has abnormal condition alarming function, easy to operate. Environmental protection performance has been improved, maintenance cost saving, energy cost saving.


The best Vacuum Annealing Furnace 1800°C by Luwei Furnace.

Vacuum Annealing Furnace that are widely used in various manufacturing units. Vacuum Annealing Furnace are fabricated using premium quality steel, refractory bricks and other heat supporting elements sourced from reliable vendors of market.

Vacuum Annealing Furnace is applied for annealing and aging treatment of a variety of alloy materials, devices (tungsten, molybdenum, niobium, copper alloy, etc.), magnetic materials, electrical steel, magnetic alloy, stainless steel, heat-resistant alloys, copper and its alloys, hydrogen storage alloy, active and hard molten metal.

Vacuum Annealing Furnace 1800°C
Brand Name: Luwei
Model: Vacuum Annealing Furnace 1800°C
Max.Temperature: 1800°C
Working Temperature: 1750°C
Furnace Chamber Size: 200*200*200MM
Temperature Controller: PID and SCR
Control Accuray: ± 1°C
Heating Element: MoSi2 heaters
Thermocouple: B type
Chamber Material: High purity Ceramic fiber

Vaccum Annealing furnace 1800°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.


Glass industrial waste refractory recycling technology

The European glass industry uses more than 100,000 tons a year for masonry kilns, which have a useful life of 5 to 8 years. The demolition of these kilns will generate thousands of tons of abandoned refractory materials, most of which will be sent to CETs or proprietary dumps.

To help users reduce the amount of waste refractory materials sent to landfills, the company is working with glass companies and kiln dismantling companies to establish standards for waste acceptance and to develop new products made from recycled materials.

At present, 30% to 35% of the silica bricks removed after the end of kiln service can be reused to make two other types of silica bricks, including siliceous wedges and light insulation Silica brick. The first European facility to comprehensively recycle spent refractory refractories specialized in the disposal of waste refractories from the glass industry, steel industrial furnaces, incinerators and chemical industries with a recovery of 90%.

Glass company will melt the wall of the kiln pool to cut the whole, re-use the effective part of the pool wall has been successful, and the ZAS brick surface with the glass removed after the use of quenching the brick crack, crushing, grinding, After screening different size fractions of aggregate and fine powder, used to produce cheap high-performance castable and iron ditch material.


Refractory materials used in optical glass manufacturing

In recent years, due to the development of the optical glass industry, the optical glass of the new variety is continuously increasing, and the refractories of the optical glass are also developed correspondingly. In addition to the earliest use of clay, kaolin, bauxite and other natural raw materials to create refractory material. There are pure oxide refractory products. Such as fused silica products, fused corundum products and sintered mullite and other refractory materials. For some new varieties of optical glass melting also used tin dioxide ceramics, platinum, platinum alloys, carbon materials as smelting optical glass high temperature container, the development of new varieties of optical glass and increase the amount of optical glass have played a A certain role in promoting.

In the optical glass melting process, in order to use the crucible method and pool furnace melting method is more common. Crucible type more. Pool melting method with the main furnace using a variety of special shaped or special cast refractories. Although such materials have a complex manufacturing process but a wide variety and high resistance to glass erosion and high temperature mechanical strength, these materials provide the advantages of selective use for melting various glass varieties. Refractories include:

1. Melting optical glass crucibles and mixers

Aluminosilicate materials: clay kaolin crucible and stirrer, high aluminum lining material, SiOAI203 ~ SiO2: system of synthetic materials.

Quartz material: transparent and opaque fused quartz, quartz ceramic crucible. Corundum material: recrystallization sintering crucible, titanium corundum crucible and mixer.

Tin dioxide material: tin dioxide crucible carbon material: pyrolytic carbon crucible, glassy carbon crucible.

2. Optical glass pool furnace material

Fused quartz brick. Casting refractory materials, which include mullite, Cuomalaite, corundum oblique zircon, mouth corundum, Lu Hong, jade corundum and other fused brick.

In the aluminosilicate refractories, as a relatively old clay-kaolin refractories, due to a certain degree of high temperature, corrosion resistance, and the manufacturing process is simple, the advantages of low prices. So in the optical glass industry still occupies a very important position. Therefore, the research on the raw material properties, chemical mineral composition and manufacturing process of such refractories remains a focus of attention.


The current trend of glass furnace refractory applications

There are three main drivers of changes and developments in refractory materials. The first is the glass manufacturer's need to improve the quality of the glass, at least for the most part. The second is the economic requirements of glass furnaces to make kilns run longer, and the third is the impact and impact of pure oxygen combustion systems. These three requirements often determine the use of improved refractory materials when repairing a kiln. These impetuses have also prompted glass manufacturers to choose improved refractory products for furnace maintenance and to adopt new technologies for extensive overhaul in their operating cycles.

Melt-cast alumina bricks have established their use in the top of the melting tank, primarily in pure oxygen fired furnaces melting high-quality glass. Before the advent of pure oxygen combustion technology, only β ˉ alumina bricks were used to melt the superstructure of the cell and alumina-free bricks without melt-casting were applied to the top of the melting cell. Today, both molten cast products of β-alumina and α-β-alumina are used in the production of some or all of the roofs of pure oxygen combustion furnaces for color television sets (screens and cones), float glass and borosilicate glass on. Melt-cast AZS bricks can typically be used at 1600 ° C or 1650 ° C (depending on the glazing), while furnace tops made of fused alumina brick can be successfully run at 1700 ° C. This creates better conditions and greater flexibility for glass manufacturers in the production of refractory glass.

For many years, melt-cast AZS furnace roofs have successfully undergone the test of cooling and reheating to enable them to use multiple operating cycles. There is now a bit of experience in successfully implementing the top cooling and reheating of fused-alumina roofs, which represent an economically viable life when they use two or more cycles of operation. The results of the observation of the fused alumina roof in service (thermal observation and shutdown observation) show that these materials are both chemically and mechanically stable. This is the first observational study of such masonry because there was neither a reference to fused alumina at the time nor the empirical basis for its application to the roof.


Reflections on the Development of Glass Industry Refractories

In recent ten years, China's glass industry has made considerable progress with the refractory materials, embodied in the large-scale float glass furnace kiln age, from 3 to 4 years to 5 to 8 years, and all materials to achieve localization, greatly Narrow the gap with the advanced level of foreign countries for the glass industry with the future development of refractory materials, and laid a solid foundation.

     In recent years, China has built more than 30 cast refractory materials enterprises, these enterprises in recent years despite the majority of varying degrees of progress, but most of the smaller scale of production, technology is weak, backward technology and equipment, product quality is difficult to guarantee. The company must have its own controllable production scale and supporting system of fused cast refractory, basic refractory, silica brick, zirconium, zirconium corundum, sillimanite, mullite refractory and new amorphous refractory material. Can provide the entire kiln refractory quality supporting materials to meet the entire glass industry, including glass fiber industry, the needs of refractory materials.

Glass furnace design, refractory production, melting furnace operation, maintenance, use and production of refractory materials and the use of scientific research between the four closely integrated, is to extend the melting furnace kiln, as soon as possible to reach the international advanced level of the important conditions one.

To extend the melting furnace kiln age must have two conditions: First, the integration of industry and trade branch of Refractories Company, to provide the furnace required for a variety of high quality refractory supporting materials; the second is to design, production, use and research Tight combination, to play their own advantages, so that the configuration of the whole furnace refractory more reasonable, superb design, meticulous operation, maintenance and management of high-quality refractory materials and supporting the supply must be closely integrated.