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Principles for magnesia-chrome brick manufacturers to follow when selecting refractories for glass kiln

2020-02-20 13:42:06

Magnesium-chrome bricks should follow the principles of refractory selection for glass kiln. Refractory material is the material basis of glass kiln, which directly affects the overall efficiency of the kiln. In glass melting furnaces, the amount of refractory material is large, the cost also accounts for the major proportion of the total kiln cost. Therefore, the rational configuration of refractory materials should be selected.

The overall goal of glass kiln refractory selection is to comprehensively consider both technical economic factors, to take into account the physical chemical properties, structural form critical use performance of refractories, the operating environment parameters of various parts of the kiln the corrosion mechanism of the material at high temperatures Based on the mutual reaction, the accumulated detailed knowledge practical experience of the actual operation performance of the kiln refractories are combined, the refractory materials in each part of the furnace are selected reasonably matched to achieve the balance of erosion, even extend the service life reduce the cost. Use effect. Specific requirements are as follows.

① Meet the necessary performance, such as high temperature performance, chemical stability, thermal stability, volume stability mechanical strength.

② It does pollute the glass liquid, has little influence on the quality of the glass liquid.

③ As long as possible.

④ There is no contact reaction between refractory materials of different materials that are put together.

⑤ Minimize material consumption heat loss.

⑥ Vulnerable parts are made of high-quality materials, other parts can be made of general materials to achieve "reasonable matching synchronized kiln age".

When selecting a refractory for a glass melting furnace, the following rules should be followed:

① It should be selected according to the specified operating environment (requirements for melting of raw material components batch materials, temperature system, atmosphere, pressure, flame conditions of fuel combustion, etc.) the causes of refractory burnout erosion during the design of the kiln. configure the corresponding refractory.

② According to the kiln age of the glass kiln design, the burning erosion rates of refractory materials used in various parts of the kiln, the physical chemical performance indicators that meet the design kiln age reduce burning erosion, the appearance size meet the requirements should be selected. material.

③ At the use temperature, two different refractory materials that will undergo a chemical reaction should be avoided together. necessary, transition bricks transition layers should also be provided between the two different refractory masonry. Otherwise, a eutectic point will be formed, but the burning erosion of the refractory will be accelerated, which will greatly affect the kiln age of the glass kiln.

④ The refractory materials used in contact with the liquid glass should reduce the horizontal brick joints as far as possible to avoid upward drilling erosion. (Especially fused zirconium corundum bricks), otherwise the erosion rate of the material will increase.

⑤ When laying refractory materials, the refractory mud needed should be the same as brick materials. Refractory materials refractory mud of different materials shall be mixed.

⑥ When selecting configuring refractory materials, it should be economical reasonable, the matching should be appropriate. the high-grade refractory material is selected, the high-grade refractory material is selected. Otherwise it will only affect the age of the glass kiln, but also cause great waste poor economic rationality.



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