金川镍沉降渣的工艺矿物学

采用化学分析、X射线衍射(XRD)、光学显微镜、扫描电子显微镜(SEM)和能谱(EDS)等方法,研究了金川镍沉降渣的矿物组成、结构、嵌布特征、主要有价成分Fe、Ni、Cu、Co的分布等工艺矿物学性质.结果表明,金川镍沉降渣主要由铁镁橄榄石和玻璃质组成,并含少量的铜镍铁硫化物、辉铜矿、磁铁矿等;沉降渣的结构单一,微细粒的铜镍铁硫化物呈星散状无规律分散在硅酸盐基质中;铁主要存在于铁镁橄榄石内,镍和铜主要赋存在铜镍铁硫化物中,钴没有独立矿物存在,主要以类质同象形式赋存在其他矿物中.镍渣中有价成分的回收可考虑用深度还原法或湿法冶金工艺.

Process mineralogy of Jinchuan nickel slag in a settlement furnace

By chemical composition analysis, X-ray diffraction ( XRD ) , optical microscopy, scanning electron microscopy ( SEM) and energy dispersive spectrometry ( EDS ) and other measurements, the process mineralogy of Jinchuan nickel slag in a set-tlement furnace was studied, including the mineral composition, structure, embedded features, distribution of Fe, Ni, Cu, and Co. The results show that the phase composition of the slag includes hortonolite and glass, a few Cu-Ni sulphide, chalcocite and magne-tite. The structure of the slag is single, and the Cu-Ni sulphide is distributed in the silicate irregularly. The irons are mainly located in the hortonolite, nickel and copper are mainly located in the Cu- Ni sulphide, and there is no independent minerals about cobalt, which is in the form of isomorphism in other minerals. The recovery of valuable metals from the slag can use deep reduction process or hydrometallurgy.