碳化钙降低闪速炉渣含镍的研究

Study on Reduction of Nickel Content in Flash Slag with Calcium Carbide

闪速熔炼是强氧化熔炼,反应塔的氧势很高,必然产生大量Fe3O4及NiO、Cu2O等并进入渣中,故渣含有价金属高。针对镍闪速炉产生炉渣的过程,分析了炉渣中镍损失的途径,探索了使用碳化钙降低渣含镍的过程。碳化钙加入后炉渣含镍降低0.03个百分点(或~11%)。

Flash smelting is one kind of strong oxidation smelting with high oxygen potential in reaction tower.It is inevitable to produce a large amount of Fe3O4,NiO and Cu2O,which will enter into slag which contains high content of valuable metals.Based on process of producing slag in Jinchuan Nickel Flash Furnace,nickel loss in slag is analyzed,and process to reduce nickel content in slag with calcium carbide is explored.Nickel content in slag drops by 0.03 percent point or^11%after addition of calcium carbide.