攀西地区钒钛磁铁矿石弱磁选工序前浮选硫钴的探讨

攀西地区是我国最大的钒钛磁铁矿产区，钒钛磁铁矿石中除了主要元素铁、钒、钛以外，还伴生有硫资源储量6 000万t、钴资源储量90万t，具有很高的工业利用价值。当前攀钢矿业公司选矿厂对钒钛磁铁矿的选矿工艺流程是“阶段磨矿—弱磁选铁—选铁尾矿强磁选钛—强磁选钛粗精矿浮选脱硫—浮选钛铁矿”得到铁精矿、钛精矿和硫（钴）精矿，仅在钛精矿浮选脱硫阶段浮选回收得到硫（钴）精矿，因为钴品位＜0.3%，钴市场价格高时作为硫钴精矿销售，钴市场价格低时只能作为硫精矿销售，造成了钴资源的浪费。开展了弱磁选工序前浮选回收硫钴的试验研究，目标是硫化矿物的早收快收集中收。实验室在磨矿细度-0.074 mm占45%，硫酸铜用量250 g/t、异戊黄药用量150 g/t、3#起泡剂用量30 g/t，一段浮选得到产率14.33%，硫品位3.11%、钴品位0.06%、镍品位0.03%、铜品位0.10%，硫回收率68.14%、钴回收率35.12%、镍回收率47.23%、铜回收率43.12%的粗硫钴精矿。探讨了实验室球磨机磨矿浮选一体机和浅槽快速浮选机，并开展了验证试验，认为浅槽快速浮选机是研究发展方向。

Discussion on the Flotation Recovery of Sulfur and Cobalt Before Low Intensity Magnetic Separation of Vanadium and Titanium Magnetite Ore in Panxi Area

Panxi region is the largest production area of vanadium titanomagnetite in China.In addition to the primary elements such as iron,vanadium and titanium,vanadium titanomagnetite is also accompanied by 60 million tons of sulfur resource and 900 000 tons of cobalt resource,which has high industrial utilization value.At present,the processing flowsheet of vanadium titanium magnetite ore in industry is "stage grinding-low intensity magnetic separation of iron-high intensity magnetic separation of titanium from iron tailings-desulfurization of titanium concentrates-flotation of ilmenite" to get products including iron concentrate,titanium concentrate and sulfur (cobalt) concentrate.The recovery of sulfur-cobalt concentrate primarily happens in the titanium concentrates desulfurization stage.Because the cobalt grade is less than 0.3%,the product is sold as sulfur-cobalt concentrate when the market price of cobalt is high,while as sulfur concentrate when the market price of cobalt is low,leading to the significant waste of cobalt resources.In this work,authors attempted to recover sulfur and cobalt by flotation before the low intensity magnetic separation,based on the principle of early recovery and fast recovery.In the laboratory,the vanadium titanomagnetite ore was ground to 45% passing 0.074 mm,and the flotation reagents include copper sulfate of 250 g/t,isoprene xanthate of 150 g/t,3# foaming agent of 30 g/t.A product with yield of 14.33%,sulfur grade of 3.11%,cobalt grade of 0.06%,nickel grade of 0.03%,copper grade of 0.1%,sulfur recovery rate of 68.14%,cobalt recovery rate of 35.12%,nickel recovery rate of 47.23% and copper recovery rate of 43.12% was achieved after one roughing flotation.The integrated ball grinding-flotation machine and shallow tank rapid flotation machine were developed for the pre-flotation recovery of sulfur and cobalt from the raw ore of vanadium titanomagnetite.Experimental results indicated that the shallow tank rapid flotation machine was promising for the early and fast recovery of sulfur and cobalt before the low intensity magnetic separation.