| In order to increase the cyanide gold leaching rate from raw ore, and reduce the amount of gold remaining in tailing and raise mineral powder processing output, The effects of ball milling time, liquid-solid ratio, leaching time and sodium cyanide concentration on the gold leaching rate were specifically investigated. The results show that the gold leaching rate is up to as high as 97.80%, and the remaining gold in tailing is less than 1.5 g/t from raw ore powder with a particle size of -325 mesh accounting for 94.17%, under the conditions of 0.25% NaCN concentration, 1.5/1 liquid to solid ratio and 48 h leaching time. According to the results, some improvements were carried on for the existing production process and equipment to guarantee a high gold leaching rate. These mainly included the change of the feeding mode, adjustment of the rotational speed during boll milling, increase of the grinding numbers as well as the augment of classification and leaching tanks, so the production technical indicators are improved significantly. |
