电加热回转窑在白钨精矿焙烧脱浮中的应用研究  

Application of Electric Heating Rotary Kiln in Roasting and Floatation of Scheelite Concentrate

作　　者：杨剑波 车文芳 候凯 YANG Jianbo;CHE Wenfang;HOU Kai(Luoyang Luanchuan Molybdenum Industry Group Co.,Ltd.,Luanchuan 471500,Henan,China)

机构地区：[1]洛阳栾川钼业集团股份有限公司,河南栾川471500

出　　处：《中国钨业》2021年第1期22-27,共6页China Tungsten Industry

摘　　要：针对河南某地区低品位白钨精矿采用了不同烘干系统对白钨精矿进行脱浮试验,在旋转闪蒸机、电磁螺旋干燥机、微波干燥机、燃煤回转窑、电加热回转窑这5种系统中,对比除尘系统、脱浮效果、焙烧后精矿浸出效果,确定了最佳脱浮路线和电加热回转窑的新工艺。钨精矿脱浮后COD可控制在200 mg/L以下,水分在0.01%以下;XRD表征氟在焙烧前后均以氟磷灰石形态存在;浸出渣WO3含量为0.091%,总体WO3回收率为99.76%,压煮回收率提高0.3%,并使该工艺在白钨精矿脱浮的工业生产中得到应用。Different drying systems were applied to test the flotation of low-grade scheelite concentrate in a certain area of Henan province.In five systems,including rotary flash evaporator,electromagnetic screw dryer,microwave dryer,coal-fired rotary kiln and electric heating rotary kiln,the best flotation route and new technology of electric heating rotary kiln were determined by comparing the dust removal system,flotation effect and leaching effect of roasted concentrate.COD can be controlled below 200 mg/L and water content below 0.01%after de-flotation of tungsten concentrate.XRD showed that fluorine existed in the form of fluorapatite before and after calcination.The WO3 content of leaching residue is 0.091%,the overall WO3 recovery rate is 99.76%,and the pressure boiling recovery rate is increased by 0.3%,which makes the process applied in the industrial production of scheelite concentrate flotation.

关 键 词：电加热 回转窑 白钨精矿 焙烧脱浮 收尘 精矿浸出 

分 类 号：TD92[矿业工程—选矿] TD463