Other refractory materials for industrial furnaces

refractory materials

Other industrial furnaces include boilers, gas stoves, heating furnaces. Building materials industry, the use of refractories furnace up, such as calcined cement industrial furnace and glass melting furnace.
Calcined cement rotary kiln working temperature in the firing zone for the 1450 ~ 1500 ℃, masonry subjected to high temperature and alkali erosion, the production of frequent rotation caused by masonry vibration, while the wear and impact of sports load, masonry Laying layer to make the brick temperature fluctuations, so the use of cement masonry with high refractoriness, good alkali resistance, high compressive strength, good thermal stability of refractories. Generally in the firing zone with the use of magnesia bricks or magnesia-alumina bricks, the calcining belt uses good quality high alumina bricks or phosphates high alumina bricks, and other places use clay tiles.
Glass kiln masonry suffered 1600 ~ 1700 ℃ high temperature role, with the material and glass chemical erosion and mechanical action, as well as dust, air erosion and so on. So the refractory material must have the ideal anti-erosion performance, and should avoid the glass in the stones, stripes, bubbles and other defects. According to this requirement glass melting furnace generally use high-quality silica brick, fused zirconia corundum brick, fused α-β corundum brick, thermal storage room using magnesia or magnesia chrome brick. Refractory industrial kiln, according to the calcined raw materials and firing products, common shaft kiln, rotary kiln, inverted flame kiln and tunnel kiln and so on. Shaft kiln masonry is subjected to high temperature and abrasive wear. Therefore, the refractory used should have substantially the same chemical properties as the calcined raw material, the refractoriness suitable for the calcination temperature of the raw material, and the good high temperature volumetric stability, mechanical strength and slag resistance. For example, calcined limestone and clay clinker can be used in clay kiln lining, calcined magnesite and dolomite shaft kiln lining magnesium, calcined bauxite with high alumina brick or high alumina brick.
Rotary kiln masonry due to rotation leaving the masonry vibration, while the movement of the charge also wear and impact masonry, masonry in addition to meet the requirements of the production process, but also should have high strength and wear resistance.
The flame-resistant kiln is affected by the high temperature effect and the scouring effect of the combustion air flow and the abrupt change in the temperature of the kiln cooling. Therefore, the refractory used has high refractoriness and mechanical strength as well as good thermal stability and high temperature volumetric stability Wait. Masonry use of refractory materials and firing products should be consistent, such as firing high-alumina refractory bricks and magnesia brick masonry using high alumina brick, magnesia brick and silicon brick.
Tunnel kiln due to the high temperature of the firing zone, masonry quality requirements. Therefore, the masonry should be used refractory, fire resistance, mechanical strength and load softening temperature are high, high temperature stability and good dimensional dimensions of the refractory material. At the same time the performance of masonry and firing performance should be adapted.

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