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对两种不同吸附剂 (Dowex -Minix树脂和CQ6 5 0活性碳 )进行了试验 ,以确定它们的固定床从澄清的低含量金溶液中回收金的效果。用Witwarterstrand金矿山磨矿 -氰化溶液作为吸附柱的原溶液。由于在磨矿过程中只浸出少量的金 ,所以在某些情况下 ,这种溶液是对具代表性的金含量低的堆浸溶液的模拟。对原溶液中金的存在形式进行了测定 ,在氰化溶液中氰化物主要以金属络合物状态存在。这些信息对于解释金属在树脂上的负载量是需要的 ,因为贱金属氰化物组分会影响金在树脂上的最终负载量。测定了两种吸附剂的平衡等温线 ,以确定特定原溶液通过吸附剂床的流速。对每种吸附剂测定了在两个线速度下的淋滤特性。试验测定了质量转移区的高度 ,该高度可用来确定 15 0m3/h工业厂洗提和吸附剂再生所需要的时间。 3个吸附柱对流配置可有效地回收金 ,并获得金含量低于 0 0 1mg/l的排出液。根据渗滤试验结果比较了树脂溶液法和活性碳溶液法从低含量溶液中回收金的技术经济指标。研究结果表明 ,活性碳溶液法厂的基本投资比树脂溶液法厂多 33 % ,树脂溶液法厂的生产费用只为活性碳溶液法厂的 6 0 %。
Two different adsorbents (Dowex-Minix resin and CQ650 activated carbon) were tested to determine the effectiveness of their fixed bed gold recovery from the clarified low-content gold solution. The Witwarterstrand gold mine grinding - cyanide solution as the original adsorption column. Since only a small amount of gold is leached during grinding, this solution is in some cases a simulation of a typical heap leach solution with low gold content. The existence of gold in the original solution was determined. Cyanide was mainly in the form of metal complex in cyanide solution. This information is needed to explain the metal loading on the resin because the base metal cyanide component affects the final loading of gold on the resin. The equilibrium isotherms of the two adsorbents were measured to determine the flow rate of the particular raw solution through the adsorbent bed. The leaching characteristics at two linear velocities were measured for each adsorbent. The test determines the height of the mass transfer zone, which can be used to determine the time required for 15 0m3 / h industrial plant elution and sorbent regeneration. Three adsorption column convection configurations efficiently recover gold and obtain effluent with a gold content of less than 0.01 mg / l. Based on the results of percolation test, the technical and economic indexes of recovering gold from low content solution by resin solution method and activated carbon solution method were compared. The results show that the basic investment of the activated carbon solution plant is 33% more than that of the resin solution plant, and that of the resin solution plant is only 60% of that of the activated carbon solution plant.