Ore dressing process of clay type gold ore leaching method

Abstract

The dump leaching process for clay type gold ore consists of the following steps: crushing ore; making pellet; stacking; and showering. The dump leaching process features the pellet making step, in which husk as loose material in the amount of 0.2-0.5 wt% of ore and water in the amount of 15-25 wt% of dry matter are added; and the stacking step including spreading wet pellet and spreading rice straw cut into 18-22 cm length. The present invention has the features of high permeability, high gold leaching out rate, low production cost and improved work environment.

Description

technical field [0001] The invention belongs to the field of heap leaching mineral processing technology, and in particular relates to a heap leaching mineral processing technology of clay type gold ore. Background technique [0002] Heap leaching method is a relatively new gold extraction process developed in the early 1970s. This method has the advantages of simple process, low investment, low cost, and large or small production scale, and is suitable for processing low-grade gold. Gold-bearing oxide ore, tailings, slag, etc. Clay-type (later-type, black-type) gold deposits have large reserves and low grades, and the economic benefits of beneficiation by other methods are poor. However, if the heap leaching method is used for beneficiation, if it is not broken or the crushed particle size is coarse, it is difficult for the leaching solution to penetrate into the inside of the ore particle; . Americans use binder cement to make loose fine-grained ore into aggregates to s...

AI Technical Summary

Problems solved by technology

Its disadvantages: when the amount of cement is small, the aggregates are easy to disperse and pulverize, which affects the overall permeability of the ore heap; when the amount of cement is large, the production cost is increased; and the permeability of the ore heap is poor, and the gold leaching rate is not high.