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目前湿法冶金处理钨精矿或含钨中间产品时尚多用碱法分解矿样。一般为了争取较高的分解率,均采用超过理论数量甚多的碱配料。因此在浸出液中过剩游离的碱也较多。此溶液进一步净化或沉淀钨酸钙时,或先用盐酸中和或直接沉淀质量较差的钨酸钙。在中和过程中碱与盐酸的消耗量甚巨,在此化工原材料供应紧张时,实有研究解决的必要。此方案的理论依据是Na_2CO_3或NaOH有吸收CO_2能力而成为NaHCO_3
Currently, hydrometallurgical processing of tungsten concentrates or tungsten-containing intermediate products uses alkali to decompose ore samples. In general, in order to gain a higher rate of decomposition, more than the theoretical number of alkali ingredients are used. Therefore, leaching solution excess free base also more. This solution to further purify or precipitate calcium tungstate, or first with hydrochloric acid or direct precipitation of poor quality calcium tungstate. Alkali and hydrochloric acid consumption in the neutralization process is huge, where the supply of chemical raw materials, the actual research necessary to solve. The theoretical basis of this scheme is that Na 2 CO 3 or NaOH has the capability of absorbing CO 2 and becomes NaHCO 3