The consumption of refractory bricks for steelmaking is significant and directly affects the lifespan and smelting cost of the steelmaking furnace. Therefore, when selecting refractory bricks, in addition to meeting the requirements of the smelting process, it is also necessary to make reasonable use of resources according to the situation, and continuously improve the pump material calcination and brick making technology, in order to adopt suitable refractory bricks and achieve the goal of long furnace life and low consumption.
At present, the refractory bricks used for the lining of oxygen converters are mainly alkaline refractory bricks containing carbon, such as tar dolomite bricks, tar magnesium dolomite bricks, tar magnesium bricks, magnesia carbon bricks, and various impregnated bricks. In addition, there are fire-resistant spray coatings for gunning.
Since the adoption of oxygen converter steelmaking, various countries have generally used magnesium and dolomite refractory bricks as furnace linings, or mixed them to make refractory bricks for use. The overall trend is towards improving the purity of raw materials, appropriately increasing the content of magnesium oxide, increasing the density of refractory bricks, and increasing the residual carbon content. The quality of furnace lining refractory bricks is gradually improving, and the variety is also constantly increasing.
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