A leaching process was provided for direct recovery of nickel from a nickel oxide filter slag obtained by filtering the pulp of calcination slag of Mo - Ni sulfide ores in hot water. The slag was given secondary intensifled leaching, the optimum extraction condition is:under the conditions of the solid -to -liquid ratio was set at 1：6 and the leaching temperature at 95℃, with the 15％ sulfuric acid, 0.5 gram of addition agent and with the help of ultrasonic wave, after 4 hours of leaching, the secondary intensified leaching ratio of nickel was 56.37％ ,the total leaching ratio was 69.34％. The phase transformation of nickel compounds in the ore is analysed preliminarily with the XRD diffraction.%采用焙烧、水浸实现了原生硫化镍钼矿中镍和钼的分离.对得到的矿渣进行二次强化浸出,考察得到的较优工艺条件为:酸浸后的矿样在固液比为1:6、浸出温度95℃、超声波振荡、浸出时间为4 h、硫酸浓度为15%和加入0.5 g添加剂条件下,镍渣中镍的二次强化浸出率为56.37%,总浸出率达到69.34%.并通过X射线衍射图谱,对矿样中镍的物相及走向进行了初步分析.
展开▼
