一、前言 尽管含镍红土矿被认为是世界最大的镍资源,但因其含镍低贫,提炼技术复杂,直到最近才更多地引起普遍的重视。 在近几十年来的镍生产中,硫化镍矿作为提镍原料一直占优势。这是因为硫化矿易于用常规手段富集,提取过程也较简易。红土矿则因系次生旷,镍呈化学浸染状态赋存,用通常物理方法不能提高镍品位。况且红土矿成分变化大、含水高,这些因素导致它的提取冶金要比硫化矿复杂得多。 I. Preface Although nickel-bearing laterite is considered to be the largest nickel resource in the world, it has only attracted more and more widespread attention recently due to its low nickel content and complicated refining technology. In recent decades of nickel production, nickel sulfide ore as raw material has been dominated nickel. This is because sulfide ore is easily enriched by conventional means and the extraction process is relatively simple. Laterite ore due to the Department of open Kuang, nickel chemical immersion state, with the usual physical methods can not improve the nickel grade. Moreover, the compositions of laterite vary greatly and the water content is high. These factors lead to its extraction metallurgy much more complex than sulfide ore.