白钨矿浸出工艺现状及发展趋势
发布时间：2019-05-11 20:39
【摘要】：我国白钨矿浸出工艺包括基于生成难溶性钙盐的碱法浸出工艺、基于生成可溶性钙盐的酸法浸出工艺以及其他浸出工艺。碱法浸出工艺的特点主要是流程短、设备简单、浸出率高、原料适应性强等,但碱法浸出工艺普遍存在能耗大、成本高的缺点,同时均需要在药剂量很大的情况下进行,进而给后续工序带来了一定的困难。酸法浸出工艺主要用于处理高品位、低杂质的优质白钨矿,对钨矿物原料的适应性较差,对原料中的杂质具有严格的要求。酸法浸出工艺的特点主要是热力学反应趋势高,但在分解过程中会产生钨酸膜,进而影响白钨矿的分解效果,此外对设备的腐蚀性较强、对环境污染严重。其他浸出工艺虽然是对碱法和酸法浸出工艺的改进,但大多难以实现工业化。因此,针对目前白钨矿分解工艺的弊端,亟待开发能耗低、操作简单、经济和清洁的白钨资源处理新技术,以期实现我国钨工业资源的可持续发展。
[Abstract]:The leaching process of scheelite in China includes alkali leaching process based on the formation of insoluble calcium salt, acid leaching process based on the formation of soluble calcium salt and other leaching processes. The alkali leaching process is mainly characterized by short process, simple equipment, high leaching rate, strong adaptability of raw materials, etc., but the alkali leaching process generally has the shortcomings of high energy consumption and high cost, at the same time, it needs to be carried out under the condition of large dosage of medicine. Then it brings some difficulties to the follow-up process. Acid leaching process is mainly used to treat high quality scheelite with high grade and low impurities, which has poor adaptability to tungsten mineral raw materials and strict requirements for impurities in raw materials. The characteristic of acid leaching process is that the tendency of thermodynamic reaction is high, but the tungstic acid film will be formed in the decomposition process, which will affect the decomposition effect of scheelite. In addition, the corrosion of the equipment is strong, and the environmental pollution is serious. Although other leaching processes are the improvement of alkali and acid leaching processes, most of them are difficult to realize industrialization. Therefore, in view of the disadvantages of the present scheelite decomposition process, it is urgent to develop a new technology for the treatment of scheelite resources, which has the advantages of low energy consumption, simple operation, economy and cleanness, in order to realize the sustainable development of tungsten resources in our country.
【作者单位】： 东北大学资源与土木工程学院;
【基金】：国家自然科学基金项目(编号:51422402,51674067) 中央高校基本科研业务费项目(编号:N140105002,N150101001) 教育部高等学校博士学科点专项科研基金新教师类项目(编号:20130042120033)
【分类号】：TD954;TF841.1
本文编号：2474831
[Abstract]:The leaching process of scheelite in China includes alkali leaching process based on the formation of insoluble calcium salt, acid leaching process based on the formation of soluble calcium salt and other leaching processes. The alkali leaching process is mainly characterized by short process, simple equipment, high leaching rate, strong adaptability of raw materials, etc., but the alkali leaching process generally has the shortcomings of high energy consumption and high cost, at the same time, it needs to be carried out under the condition of large dosage of medicine. Then it brings some difficulties to the follow-up process. Acid leaching process is mainly used to treat high quality scheelite with high grade and low impurities, which has poor adaptability to tungsten mineral raw materials and strict requirements for impurities in raw materials. The characteristic of acid leaching process is that the tendency of thermodynamic reaction is high, but the tungstic acid film will be formed in the decomposition process, which will affect the decomposition effect of scheelite. In addition, the corrosion of the equipment is strong, and the environmental pollution is serious. Although other leaching processes are the improvement of alkali and acid leaching processes, most of them are difficult to realize industrialization. Therefore, in view of the disadvantages of the present scheelite decomposition process, it is urgent to develop a new technology for the treatment of scheelite resources, which has the advantages of low energy consumption, simple operation, economy and cleanness, in order to realize the sustainable development of tungsten resources in our country.
【作者单位】： 东北大学资源与土木工程学院;
【基金】：国家自然科学基金项目(编号:51422402,51674067) 中央高校基本科研业务费项目(编号:N140105002,N150101001) 教育部高等学校博士学科点专项科研基金新教师类项目(编号:20130042120033)
【分类号】：TD954;TF841.1
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