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文章介绍了采用H_2及CO对铜镍硫化矿进行还原焙烧—浸出,以获得高品位冰铜(或金属铜);浸出液高温水解分离铁、镍的冶炼新工艺。它具有方法简单,只经还原、浸出、氧化水解等三个工序,即可彻底解决铜、镍、铁的分离,并使硫成元素硫、铁成Fe_2O_3回收;试剂盐酸及氧化钙均可再生,达到无废渣,无污染,综合回收全面,回收率高等显著优点。本文着重研究了用H_2及CO还原一浸出的效果和高温氧化水解分离镍、铁以及CaCl_2高温水解的效果。试验表明,脱铁、脱硫率可达98～99％以上;浸出和分离的总回收率,镍>90％、铁99％以上;分离液中的铁含量可降至0.030(克/升)以下。
In this paper, the reduction roasting-leaching of Cu-Ni sulphide ores with H 2 and CO is introduced to obtain the high-grade matte (or metallic copper); the new process of smelting iron and nickel by leaching solution at high temperature is studied. The method has the advantages of simple method, only the three processes of reduction, leaching and oxidation and hydrolysis can completely solve the separation of copper, nickel and iron and make sulfur into elemental sulfur and iron into Fe_2O_3 recovery; and the reagent hydrochloric acid and calcium oxide can be regenerated , Reached no residue, no pollution, a comprehensive comprehensive recovery, the obvious advantages of higher recovery rate. In this paper, the effect of H_2 and CO reduction and leaching and the effect of high temperature oxidation on the hydrolysis of nickel, iron and CaCl_2 were studied emphatically. The test shows that the desulfurization rate can reach over 98-99%; the total recovery rate of leaching and separation is more than 90% for nickel and 99% for iron; the iron content in the separation liquid can be reduced below 0.030 (g / l) .