增补盐湖卤水动态溶解钾矿的技术研究

发布时间：2018-03-03 05:32

本文选题：钾盐溶解　切入点：补卤速度　出处：《青海大学》2015年硕士论文　论文类型：学位论文

【摘要】：柴达木盆地占我国总产量95%以上的钾肥,是影响我国粮食安全的非常重要的国家战略物质,保障当地钾肥的生产具有全国性的战略意义。但经过数年开采,采矿点由于卤水下降过快,盐层中的液体钾矿凝结成无法开采的固体状态,严重制约着该地区经济的发展。增补盐湖卤水动态溶解钾矿是一个盐湖开发中急待解决中的技术难题。研究以青海马海低品位钾矿为研究对象,从资源的综合利用、降低提钾成本的角度出发,采用动态横管补卤,通过室内单因素研究测定补卤速度、补卤量、采卤速度对盐矿中钾盐溶解的影响;室内正交试验确定增补盐湖卤水动态溶解钾矿的技术参数;盐田示范点试验对正交试验的技术参数进行修正和完善,建立增补低品位钾矿的双井管补采技术,使盐田示范点的盐湖卤水中氯化钾含量达到1.2%。研究表明:盐矿中钾离子溶解效果与补卤速度的关系为在一定范围内,随流速的增大而增大,当补卤速度达到一定值后,溶解效果不再增加,甚至下降;补卤量对盐矿中钾盐的溶解影响与补卤速度相似;采卤速度对盐矿中钾盐的溶解影响不大;并得出了溶解钾盐所需溶液与盐矿的体积比为0.62。初步制定动态溶解钾矿的技术参数为补卤速度100m·h-1、采卤速度125m·h-1。
[Abstract]:The Qaidam Basin, which accounts for more than 95% of our country's total output, is a very important national strategic material that affects the food security of our country. It is of national strategic significance to ensure the production of local potash fertilizer. However, after several years of exploitation, Because the brine drops too fast, the liquid potassium ore in the salt bed condenses into a solid state that cannot be mined. It is an urgent technical problem in salt lake development to supplement the dynamic dissolution of potassium ore in brine of salt lake. Taking the low grade potassium ore of Mahai in Qinghai as the research object, the comprehensive utilization of resources is studied. From the angle of reducing the cost of potassium extraction, the influence of the rate of rehalification, the amount of halogen and the rate of brine mining on the dissolution of potash salt in salt ore was determined by using dynamic horizontal pipe to add halogen. The laboratory orthogonal test determines the technical parameters of adding dynamic dissolved potassium ore from brine of salt lake, the salt field demonstration point test modifies and perfects the technical parameters of orthogonal test, and establishes the technique of adding low-grade potassium ore to double well tube. The content of potassium chloride in the salt lake brine of the salt field demonstration site is up to 1.2. The results show that the relationship between the dissolution effect of potassium ion in salt ore and the rate of brine recharge increases with the increase of the velocity of flow, and when the rate of brine recharge reaches a certain value, the relationship between the dissolution effect of potassium ion in salt ore and the rate of brine recharge is increased. The effect of brine addition on the dissolution of potash in salt mines is similar to that of brine addition, but the rate of brine extraction has little effect on the dissolution of potash in salt mines. The volume ratio of solution to salt is 0.62.The technical parameters of dynamic dissolution of potassium ore are as follows: rehalification rate 100m 路h-1and brine recovery rate 125m 路h-1.
【学位授予单位】：青海大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD871.1;TS311

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