钨矿选矿工艺研究

对滇南某钨矿物与褐铁矿连生，两部分相互穿插的钨矿选矿工艺进行了研究。利用化学分离法进行选矿，研究制定了掺碱焙烧-浸煮-酸沉的选矿工艺。考察了不同的焙烧温度、浸煮时间、浸煮液固比、NaCO3加入量、NaNO3加入量对WO3含量及回收率的影响。结果表明，当焙烧温度在800℃，浸煮时间为50min，浸煮液固比取4：1，NaCO3加入量为2．5g，NaNO3为0．75g时，钨的回收率最高，可达24．02％，WO3的含量最高可达49．89％。

Study on the Ore Texture and Beneficiation Technology of Tungsten Ore

The ore texture and beneficiation technology of tungsten ore intergrowth with limonite and intereross each other in south Yunnan was studied in the paper. Tungsten is beneficiated by ＂calcinations-immersed with alkali boil-sour sinking＂ process. The ef leers of the calcined temperature, boiling time, boiling liquid-solid ratio, addition of NaCO3 and NANO3 on the content of WO2 and recovery rate were studied. The results show that when the calcinations is conducted at temperature of 800 ℃, the boiling time of immersing in liquid with liquid-solid ratio of 4：1 is 50 rain, and the addition of NaCO3 and NANO3 is 2.5 g and 0.75 g respectively, the recovery rate can reach to 24.02, which is the highest value, the content of WO3 reach to 49.89%.