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在石煤钒矿中,冶炼方法的选择关键是由钒在该类矿石中的赋存状态决定的。要将钒浸出,首先必须破坏晶格结构,使赋存在晶格结构中的钒释放出来。在焙烧过程中采用不同的控温制度,使焙烧脱碳阶段在550℃时保持30 min,氧化阶段在850℃时保持40 min,不但脱碳彻底,而且提高了钒的转浸率。在浸出过程中添加助浸剂B,控制酸浓度20%、助浸剂用量B 2%、液固比2:1、温度90℃、浸出时间12 h,可使转浸率高达85%以上。此方法适合空白焙烧、钠法焙烧、钙法焙烧、钡法焙烧等焙烧工艺产生的焙烧球,尤其适合于V(Ⅲ)达80%~90%及以上的矿物以及矿物颗粒极细微、嵌布关系复杂的钒云母矿物。
In the stone coal vanadium ore, smelting method is the key to the choice of vanadium in this type of ore occurrence state decision. To leach vanadium, you must first destroy the lattice structure, so that the existence of vanadium in the lattice structure is released. During the calcination process, different temperature control systems were used to maintain the calcination decarburization stage at 550 ℃ for 30 min and the oxidation stage at 850 ℃ for 40 min, which not only completely decarburized but also improved the vanadium transfer rate. In the process of leaching, B is added to control the acid concentration of 20%, the amount of B 2%, the liquid to solid ratio of 2: 1, the temperature of 90 ℃ and the leaching time of 12 h. The method is suitable for roasting balls produced by roasting processes such as blank roasting, sodium roasting, calcium roasting and barium roasting, and is especially suitable for the minerals with V (Ⅲ) up to 80% to 90% Complex vanadium mica minerals.