某难选白钨矿预选工艺研究

Research on Preconcentration Technology of a Refractory Sheelite Ore

某白钨矿钨品位仅0.38%,矿物组成复杂,嵌布粒度细,矿石中含多种硫化矿、多种大量含钙脉石,为难选白钨矿。试验针对矿石工艺矿物学特点,进行了全浮选、高梯度磁选-浮选、重选-浮选3种粗选预选工艺研究。结果表明,高梯度磁选-浮选工艺获得的钨粗精矿钨品位最高,为6.16%,钨回收率达到85.27%,该工艺相比其他两种工艺,工艺简单,处理量大,药剂用量少,成本低,是适宜开发此类矿物的预选工艺。高梯度磁选-浮选预选工艺获得的白钨粗精矿经简单加温精选可获得WO3品位66.28%、WO3回收率77.87%的白钨精矿产品,实现了此类白钨矿的合理利用。

The grade of WO3 in a scheelite ore is only 0.38%, and the mineral component of this ore is complex, the dissemination size of this ore is fine, there are various sulfide ores and lots of different calcium bearing gangue minerals, so, this ore is refractory ore. There are 3 kinds of preconcentration technology based on the process mineralogy characteristic of this ore, the process of whole froth flotation, the process of High Gradient Magnetic Separation（HGMS）-froth flotation, the process of gravity separation-froth flotation, the results indicate that, the WO3 grade of HGMS-flotation concentration is highest as 6.16% with the nice WO3 recovery of 85.27%, this process is more simple, higher treatment quantity, lower cost and less dosage of reagent than the other 2 kinds of processes, so, the HGMS-flotation preconcentration technology is suitble for this ore. And the product of HGMS- flotation preconcentration technology has good quality, it is easy to get the finall high quality white tungsten concentrate by heating cleaning, the WO3 grade of the tungsten concentrate is 66.28% with WO3 recovery of 77.87%. So, this ore can be utilized.