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(一)还原气氛与脱锌废铜的主要来原是:铜锌合金、铜镍合金、铜锡合金等,其成份一般为Cu、Zn、Sn、Fe、Ni、Pb、As、Sb、Au、Ag等,含量最高的是铜、其次是锌。鼓风炉熔炼废铜的目的是:将混杂的废铜熔化变为黑铜,并除去部分杂质。杂铜鼓风炉一般视为简单的熔化炉,但是,要想获得较高的黑铜品位和炉渣、黑铜含锌较低以及先进的技水经济指标,还有很多的技术问题尚待研究,特别是关于锌的挥发和降低炉渣含铜率,在技术上并不是容易获得解决的问题。肯定锌的最大挥发区域,对了解和掌握整个炉子有很大的好处。大家知道:锌在炉内是呈锌铜合金的形态而存在的。合金受热后发生离析,造成金属锌的挥表,在鼓风炉的温度下,这种挥发容易进行,不必藉用还原剂的帮助。因此,有人建议将炉子控制成中性气氛,即可使锌跑掉,以达到减少用焦的目的。但是,实际上这是不容易做到的。
(A) the atmosphere and dezincification of scrap copper is the main original: copper and zinc alloy, copper and nickel alloy, copper and tin alloy, the composition is generally Cu, Zn, Sn, Fe, Ni, Pb, As, Sb, Au , Ag, etc., the highest content of copper, followed by zinc. The purpose of smelting scrap copper in blast furnaces is to melt mixed copper scrap into black copper and remove some impurities. Copper-blast furnaces are generally considered as simple melting furnaces. However, there are still many technical problems to be studied in order to obtain higher copper grade and slag, lower zinc-black copper content, and advanced technical and economic indicators It is technically not an easy solution to the issue of volatilization of zinc and reduction of the copper content of the slag. Affirming the area of maximum volatility of zinc is of great benefit to understanding and mastering the entire furnace. We all know: zinc in the furnace is the presence of zinc-copper alloy morphology. The alloy is segregated after it has been heated, resulting in the volatilization of metallic zinc, which is easy to carry out at the blast furnace temperature without the aid of a reducing agent. Therefore, it was suggested that the furnace control into a neutral atmosphere, you can run away zinc in order to achieve the purpose of reducing coke. However, in fact it is not easy to do.