Pre-concentration stages are generally employed to process base and precious metals where the feed grades are inferior. The pre-concentration could remove major gangue minerals and enrich the desired metal content. Further, it improves the efficiency of subsequent concentration stages. In the present investigation, pre-concentration studies were carried out on the mixed copper ore from Malanjkhand, India, containing 0.48% Cu and 74.12% SiO₂ contents. Mineralogical characterization revealed that chalcopyrite is the major copper contributing mineral along with a minor amount of malachite. The major gangue minerals present in the ore are quartz, feldspar and mica. Liberation studies of the feed material indicate that around 75% of gangue minerals (mainly quartz) are liberated at 150 µm. Pre-concentration studies were carried out using a Wilfley shaking table, wherein deck angle and wash water rate were varied to achieve the maximum recovery and grade. Optimum results were achieved at a wash water rate of 3.5 lpm and deck angle of 4.9°, wherein the silica rejection and separation efficiency of 52.19% and 53.68% were achieved. The final product assays 2.79% Cu grade and 66.32% copper recovery. The investigation results indicate that the shaking table could be used to pre-concentrate Malanjkhand copper ore.

预浓缩阶段通常用于处理进料品位较低的贱金属和贵金属。预浓缩可以去除主要的脉石矿物，并丰富所需的金属含量。此外，它提高了后续浓缩阶段的效率。在本次调查中，对来自印度Malanjkhand的含0.48％Cu和74.12％SiO ₂的混合铜矿石进行了预浓缩研究。内容。矿物学特征表明，黄铜矿是主要的铜元素矿物，同时孔雀石数量很少。矿石中存在的主要脉石矿物是石英，长石和云母。进料的自由化研究表明，大约150％的煤石矿物（主要是石英）中有75％被释放。使用Wilfley振动台进行浓缩前研究，其中甲板角度和洗涤水速率有所不同，以实现最大的回收率和等级。在3.5 lpm的洗水速度和4.9°的平台角度下获得了最佳结果，其中二氧化硅的截留率和分离效率分别为52.19％和53.68％。最终产品可检测出2.79％的铜品位和66.32％的铜回收率。