1.Strong scouring and wear of high temperature molten iron and slag. Since the temperature of molten iron is as high as 1400 ℃or higher, industrial refractory material for furnace lining and the stirring and blowing equipment will be strongly washed by the high temperature iron during the pre-existing process of molten iron, industrial refractory material is required to be used in the hot metal pretreatment process. The refractory material has high temperature strength and is resistant to wear.
2.Chemical attack of various pretreatment agents. Since various desulfurizing agents react with the kiln lining and the refractory materials for the stirring and blowing devices during use, and can generate some low-melting substances, dissolved in molten iron, especially for some low-melting soda and other fluxes, They make the refractory erosion of various pretreatment agents particularly severe, so the refractory materials used in the pre-existing process of molten iron are resistant to various pretreatment agents.
3.Permeation and erosion of furnce slag. In the hot metal pretreatment process, both CaO and FeO will form a low melting point with SiO 2 and Al 203 in the refractory material, which will cause erosion and melt damage to the refractory material. Therefore, it is required that the refractory material used in the hot metal pretreatment process is good. Resistance to slag erosion.
4.The temperature drastic effect caused by intermittent operation, because the molten iron pretreatment device will undergo the process of charging molten iron, hot metal treatment and pouring molten iron and empty bag between each hot metal pretreatment process, so the molten iron pretreatment. The device will be subjected to a certain temperature change, which requires the hot metal pretreatment device to have good thermal shock stability with the furnace refractory materials.
In addition, the refractory materials in furnace used are also required to facilitate on-site construction and have less environmental pollution.
