Narxi qancha? refractory bricks for metallurgical furnaces?

Narxi qancha? refractory bricks for metallurgical furnaces? This may be a question that friends in the metallurgical industry need to know. Refractory bricks commonly used in metallurgical furnaces include silica bricks, corundum mullite bricks, and magnesia-iron spinel bricks. There are many types of refractory bricks for metallurgical furnaces, and the specific price should be negotiated with the manufacturer to choose the most suitable refractory brick. The following introduces these commonly used metallurgical furnace bricks.

1. The mineral phase composition of silica bricks is mainly composed of tridymite and cristobalite, with a small amount of quartz and vitreous. At low temperatures, the volume of tridymite, cristobalite and residual quartz changes greatly due to the change of crystal shape. Therefore, the thermal stability of silica bricks at low temperatures is poor. During use, it should be slowly heated and cooled below 800°C to avoid cracks. Therefore, it is not suitable for use in kilns with rapid temperature changes below 800°C.

2. Corundum mullite brick is a high-alumina refractory material composed of corundum and mullite. Corundum mullite bricks refer to refractory products made of high-purity or relatively pure raw materials. It has good high temperature strength, high temperature creep performance, thermal shock resistance and corrosion resistance. Both blast furnace hot blast stoves and ceramic stoves are suitable.

3. Magnesium-iron spinel bricks are made of high-quality synthetic spinel as raw materials and processed by a special process. The product has the characteristics of high compressive strength, good thermal shock stability, good thermal creep performance, and high load softening temperature. At the same time, it also has the direct combination of magnesia-chrome bricks and is easy to stick to the kiln skin, which solves the environmental pollution problem of hexavalent chromium produced in the process of using magnesia-chrome bricks in cement kilns.