With the glass melting furnace oxygen-rich combustion, oxygen burning, arsenic-free material melting process and electric welding technology to promote the use of refractory materials, especially cast refractory materials put forward higher requirements.
With the development of science requires a higher performance of refractory materials, which also need to develop more new refractories, and the corresponding evaluation techniques. In short, the maximum to meet people's production needs.
Technology Evaluation of Glass Kiln Refractory
1.Continuous bubble experiment
Continuous bubble experiment is a method of directly observing the bubbles occurring at high temperature. By recording the aging at high temperature into a television image, it is possible to observe the occurrence of bubbles of refractory material for a long time and continuously, and to carry out a method of making a bubble closer to the actual kiln Evaluation. Since the aging change can be measured, the bubble generation rate of the refractory material represented by the following formula can be measured. This is from the unit area of refractory material that the number of bubbles per unit time, can be more accurate evaluation.
2. Corrosion resistance
Corrosion test methods for refractory materials for glass fines, with dynamic erosion test methods and static erosion test methods. The former generally use the rotary erosion test method, which generally use finger test and clamp vortex test method. However, these methods are not likely to exhibit good corrosion resistance with good reproducibility for all refractory materials and glass, and it is desirable to have a good reproducibility test method in order to compare the corrosion resistance of the refractory to the glass. 3. Volatile steam test
From the viewpoint of reducing NOX and energy saving, oxygen combustion technology is noticeable. When the amount of combustion exhaust gas is reduced to about one fifth when the combustion from air combustion to oxygen is carried out, the concentration of volatile matter such as R2O, B2O3, PbO, and SiO in the upper space of the glass kiln is greatly increased and the water vapor partial pressure is increased. The increase in the concentration of these volatile components and the increase in water vapor partial pressure, such as Na2O as NaOH, will tend to further increase its erosivity, accelerate the erosion of the upper space refractory material, affecting the life of the kiln. Therefore, it is important to select a test for evaluating the refractory material for the upper space when oxygen is used.
Development Trend of Refractory Material Production Technology
1. More widely used synthetic raw materials and selected minerals as refractory materials to improve the purity and density of raw materials, it is estimated that the use of such raw materials will reach about 30%.
2. In the processing process, to further strengthen the raw materials and semi-finished products of physical and chemical effects, such as the use of ultra-fine grinding machine for fine grinding, mixing equipment, highly uniform, the use of fused raw materials to strengthen the interaction of components, High pressure molding and according to the refractory material structure and performance to improve the firing temperature.
3. Widely used composite materials to strengthen the refractory structure of the grain boundary parts, to the direction of high-performance ceramic development.
4. Develop energy-saving non-fired products and unshaped refractories through low-temperature treatment and various bonding agents (ceramic suspension, colloidal solution, tar, etc.).
5. Study and make full use of the chemical properties of carbon and the interaction between carbon and other components and various additives that can affect fire resistance.
The Shixing company is adopted on producing high quality Fused Cast AZS Block used in glass furnaces. Established to produce series of shaped blocks Fused Cast AZS-33# Block, Fused Cast AZS-36# Block and Fused Cast AZS-41# Block with annual production capacity 20,000 tons/year. New materials production zone is equipped with two high-temperature shuttle kilns, mainly producing Zircon Brick, Silica Brick, Magnesia Brick, etc.
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