The Research and Application of Barren Solution Purification by Three Step Precipitations

Based on the fact that, under different PH values, harmful metal ions to gold leaching in the barren cyanide solution have different solubility, this method, by means of adjusting PH value and adding assistant precipitant, remove these ions from the solution in three steps, by which, the solution can be reused and zero waste disposal realized.

The method of three step precipitation has the merits of low investment, low cost, simple technique, easy operation, strong adaptability and obvious economic profit. It is adaptable in treating barren solution with different concentration and different composition; it is very competive in market, it can not only protect the environment, maintain the ecology balance, promote the healthy and sustainable development of gold industry, but also improve the quality of environment and have practical and active effect and great meaning in realizing the balanced development of resource and environment. It is siutable to the situations of our country, and meets the environment protection policies of China. Comparing with other methods, it is simple and practical with wide range of applications and promising prospect.