Surface tank leaching process for classified heap building

Abstract

The invention provides a surface tank leaching process for classified heap building. The process comprises the steps as follows: firstly, ore is crushed into different grain grades by a crusher, screening-mixing is performed for grading treatment, and then the treated ore is conveyed into a leaching tank of a surface tank leaching solution reaction device for classified heap building to be subjected to zonal heap leaching; a leaching solution in the liquid preparation tank is pumped to the leaching tank by a supply pump for spraying, spraying distribution is performed in different zones and different intensities, and the leaching solution is conveyed to a solution enriching tank via a solution outlet, pumped to a head tank by a leaching lift pump, and fed into an adsorber from the head tank for ion exchange; elution is performed in a manner of three-tower serial orthoflow, and an eluant is conveyed to the head tank from an eluant preparation tank, and subjected to three-tower serial countercurrent elution at a certain rate to become a qualified solution; and lean resin from the adsorber is returned to the adsorber for recycling, and the qualified solution is pumped to a settling tower for settling, and is finally filtered by a filter press to form the finished product. The process is simple and high in practicality.

Description

technical field [0001] The invention relates to the technical field of metal ore leaching and smelting, in particular to a surface tank leaching process for sorting and stacking. Background technique [0002] The surface tank leaching method is to spray the leaching solution on the broken and porous ore heap (waste rock). During the infiltration process, it selectively dissolves and leaches the useful components in the waste rock or ore heap. At the same time, the leaching solution at the bottom of the leaching pile is collected for extraction and metal recovery. The surface tank leaching method is the earliest and most widely used solution mining method in China. This technology can recover useful components in low-grade ores, refractory ore bodies, refractory ores and waste rocks that cannot be recovered by conventional mining methods. Effectively broaden the scope of utilization of underground mineral resources. [0003] At present, this method has developed into an eff...

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Problems solved by technology

Although the output of metals extracted by the heap leaching method in my country is increasing year by year, it has also been widely used at home and abroad, and a series of progress has been made in theoretical research, ore types, heap building, liquid distribution, and metal recovery. There are still the following problems: high mud content of ore, poor permeability, uneven distribution of solution, low leaching rate of ore heap, etc. The existence of these problems directly affects the leaching effect and sustainable development of leaching mining in my country. Therefore, surface tank leaching technology Still need to continuously optimize

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