Based on the characteristics and process mineralogy of oxidized ore,desliming,flotation and gravity separation joint process was used to sort metal minerals.The results showed that the process had excellent separating effect.It made full use of mineral resources and got maximum benefit.
On the basis of the research on processing mineralogy of ores,the experimental research on flotation for the refractory nickes ore with the nickel of 0.44%was carried on.At last,the nickel concentrate with the grade of 3.13%and the recovery of 25.53%was obtained,whose index is relatively low.Therefore,the methods of chemical processing or smelting enrichment were considered to be adopted to extract the nickel in the tailings.The nickel sulfate in the ore can be easily dissolved in the pulp,making the pulp acid.At the same time,nickel oxide can be dissolved in the dilute solution and nickel silicate in the high acidity can also be part of the solution.For nickel sulfate,it can be partly digested in the dilute dissolution and better in the oxidation environment.According to these properties,the indexes with the content of nickel as 21.42%and the recovery of 61.84%could be obtained under the optimum leaching conditions.The result is satisfactory.
内蒙古阿拉善盟某地钒矿,矿石矿物有绿硫钒,伴生有及少量的黄铁矿、辉钼矿等;脉石矿物为绢云母,石英、绿泥石及部分碳酸盐类矿物。针对矿石特征,采用化学方法提纯该钒矿,获得钒精矿品位98.52%,得到了满意的试验结果,对开发利用该钒矿资源有重要意义。
采用酸浸工艺处理氧化铅锌矿,研究了各种因素浸出的影响,结果表明:在温度85℃、矿石粒度-20目、酸矿质量比1∶2、液固体积质量比5∶1、搅拌浸出4h条件下,铅浸出率可达75%以上,锌浸出率可达70%以上。
额济纳旗难选氧化铜矿的可浮性较差,选别指标不理想。为了提高铜精矿的指标,本文进行了硫酸浸出试验研究。结果可以看出,在矿石粒度-200目占75%、浸出时间6h、硫酸浓度1.5mol/l、液固体积质量4∶1的条件下,铜浸出率可达83.91%。
针对内蒙古某贫磁铁矿的矿石性质和特点,进行了选别工艺探索研究。采用干式磁选抛尾——干式磁选粗精矿再磨——弱磁选选别工艺流程,使铁精矿达到国家C65一级品质量标准,TFe品位为64.93%、回收率为66.50%;mFe品位61.84%、回收率93.27%。
With citric acid as binder,Li2TiO3 pebbles with diameter of 1.20 mm and relative density about 91%TD were prepared by an optimized wet chemical method.Thermodynamical analysis,phase analysis and morphology observation were made on the product.The results showed that the sphericity of the Li2TiO3 pebbles was significantly affected by the amount of citric acid.The microstructure of the Li2TiO3 pebbles was uniform and temperature-sensitive.The average grain size of the pebbles is below 3 μm after sintering at 1 050 ℃ for 6 h.
