Refractories for blast furnace slag production
  • Time:Aug 08, 2023
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Yes, blast furnace slag production does use refractories. Blast furnace is a kind of equipment for smelting iron, which includes furnace body, hearth, slag mouth and other parts. In high temperature and corrosive environments, refractory materials are used as the lining and protective layer of blast furnaces to withstand the high temperature and chemical attack generated during the reduction of iron ore.

The following are the applications of several common refractory materials in blast furnace slag production:

1. Refractory bricks: Refractory bricks such as high alumina bricks, magnesia alumina bricks and carbon bricks are widely used in blast furnaces. They withstand high temperatures, resist corrosion, and offer good mechanical strength and thermal shock stability.

2. Magnesia carbon brick: Magnesia carbon brick is composed of magnesium powder and graphite, which has good fire resistance and electrical conductivity. They are commonly used as lining materials in the bottom and tuyere areas of blast furnaces to resist high temperature and chemical attack.

3. Unshaped refractory materials: Unshaped refractory materials such as refractory castables and refractory coatings are also widely used in blast furnaces. They have good refractory performance and adhesion, and can be used for repair and protection of furnace walls, slag ports and other parts.

4. Refractory ceramic materials: Some special ceramic refractory materials such as zirconia ceramics and alumina ceramics are also used in the production of blast furnace slag. These materials have increased temperature resistance and corrosion resistance, which can provide a longer service life under extreme conditions.

High alumina bricks

The above are some common application examples of refractories in blast furnace slag production. Which refractory material to choose depends on the process requirements, operating conditions and expected effects of the blast furnace. To ensure proper operation and long-lasting performance of a blast furnace, selection of the appropriate refractory material, as well as proper installation and maintenance are critical.

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