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在早期研究中,我们确定了用氯化铁溶液和稀硫酸从转炉渣中浸出回收钴、镍和铜的最佳条件。应用这两种浸出剂,可以溶解出转炉渣中大部份的铜、镍和钴。但由于浸出液中含有大量铁,因此,从中分离和回收铜、镍和钴就很困难。本文研究了一种加压稀硫酸浸出方法。在该法中利用氧化和水解作用使铁的污染降至最低程度。为了最大限度地溶解出铜、镍和钴,研究了浸出时间、矿浆含固量、粒度、酸浓度和氧分压等参数的影响。在最佳条件下,可浸出约90％的铜和95％以上的镍和钴,而铁的浸出率却仅为0.8％。
In earlier studies, we identified the optimal conditions for the leaching recovery of cobalt, nickel and copper from converter slag with ferric chloride solution and dilute sulfuric acid. The use of these two leaching agents dissolves most of the copper, nickel and cobalt in converter slag. However, since leachate contains a large amount of iron, it is difficult to separate and recover copper, nickel and cobalt therefrom. This article studies a method of pressured dilute sulfuric acid leaching. In this law the use of oxidation and hydrolysis to minimize iron pollution. In order to dissolve copper, nickel and cobalt to the maximum, the effects of leaching time, pulp solids content, particle size, acid concentration and oxygen partial pressure were studied. Under optimal conditions, about 90% copper and 95% nickel and cobalt can be leached, while the leaching rate of iron is only 0.8%.