Under operating conditions, continuous use, smelting of gray iron, pig iron, ductile iron, and other cast iron materials in a furnace material factory, neutral furnace material, and normal furnace lining usage can reach more than 500 heats; The normal lining life of smelting plain carbon steel, high carbon steel, and high chromium steel can reach about 195 heats, which can increase the lining life by more than 50% compared to traditional products. The high production 70 ton intermediate frequency steelmaking furnace has a furnace life of 35-60 heats, 40 ton intermediate frequency steelmaking furnace has a furnace life of 40-70 heats, and 1 ton intermediate frequency casting furnace has a furnace life of 300-600 heats (reference value).
The damage of the induction furnace lining is mainly caused by the infiltration of molten metal, metal oxides, slag, and the effect of temperature stress. The lining of an induction furnace is relatively thin, and there is a large temperature gradient in the lining, which is prone to cracking and peeling of the lining. When molten metal, metal oxides, or slag penetrate deep into the furnace lining along cracks, it occurs: the molten metal undergoes oxidation-reduction reactions or generates low melting point substances, causing erosion or cracking or peeling of the furnace lining. The molten metal undergoes oxidation reaction with refractory materials, accompanied by volume expansion, causing the furnace lining to expand and collapse. Erosion and erosion of furnace lining by molten metal or slag.
Electric arc furnace steelmaking is mainly based on scrap steel. In the 1980s and 1990s, the capacity of electric arc furnaces was mostly 40-120 tons. Zoot raw materials were produced using different lining materials and slag making materials. Alkaline and acidic electric arc furnaces are also common in production, and large electric arc furnaces have a capacity of 4 tons. However, there are differences in the world law. The commonly used method is the alkaline method. Electric arc furnace steelmaking uses electricity as the source of 75% of the output of thermoelectric furnace steel, which comes from the so-called "small steel plant", that is, the annual steel production as the source, avoiding the pollution of steel caused by the sulfur content in the gas heat source; A steel plant with a production capacity of 50000 to 250000 tons and a continuous casting machine and small rolling mill.
