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Liquid distributing method in tank leaching process

A technology of liquid distribution and tank leaching, which is applied in the field of liquid distribution in the tank leaching process and infiltration tank leaching, can solve the problems of easily blocked screen structure, low leaching rate and long leaching period, and achieves easy popularization, application and management. Convenient and easy-to-use effects

Inactive Publication Date: 2010-10-13
UNIV OF SCI & TECH BEIJING +2
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Problems solved by technology

The above method has certain disadvantages. The tank leaching materials are generally fine in particle size and belong to powdery ore. During the acid leaching process, the fine-grained materials migrate and easily block the screen structure at the bottom of the tank, thereby deteriorating the penetration effect and leading to a leaching cycle. Long, low leaching rate, especially in tank leaching of ores with high powder ore content

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  • Liquid distributing method in tank leaching process
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Embodiment Construction

[0014] Below by example in conjunction with accompanying drawing the present invention is further described.

[0015] A copper oxide ore is extracted by acid leaching process, the ore oxidation rate is about 65%, and the ore with a particle size between 1 and 5mm is leached by tank leaching process. During the leaching process, the initial acidity is 50g / L, the thickness of the sand layer is 500-900mm, the liquid-solid ratio is 3:1, and the ore loading in a single tank is between 60-100t.

[0016] The tank leaching facility is composed of six groups of 12 tanks. The bottom (3) of the tank (2) has a false bottom structure. The top of the tank (2) is provided with an overflow port, and the height of the ore layer must not exceed the height of the overflow port. .

[0017] In the initial stage of tank immersion, liquid is distributed in a downstream manner, and only the second plastic pipe (10), the first ball valve (6) and the acid-resistant pump (5) are installed. Start the a...

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Abstract

The invention belongs to the field of special exploration of metal mines, and relates to a liquid distributing method in a tank leaching process, which is suitable for infiltration tank leaching of various ores. In the invention, a counter current liquid distributing mode is added on the basis of a traditional down-flow liquid distributing mode, i.e. a process that infiltration solution enters an ore bed from the bottom of a tank is adopted, the leaching solution slowly infiltrates upwards, and flows out from the top of the tank. The infiltration direction is periodically changed through controlling a ball valve, and the counter current liquid distributing mode and the down-flow liquid distributing mode are alternatively used to realize a combined liquid distributing mode. The novel liquid distributing mode can avoid the blocking phenomenon of on a false bottom structure, which is caused by fine granules, improves the leaching efficiency, and has the advantages of simple operation, convenient management as well as easy generalization and application.

Description

technical field [0001] The invention belongs to the field of special mining of metal ores, and relates to a method for distributing liquid in a tank leaching process, which is suitable for leaching in percolation tanks of various ores. Background technique [0002] Tank leaching is an older leaching method. Its process is to place the broken ore in a tank with a false bottom, the false bottom is covered with a filter medium, and the bottom of the tank is equipped with a pipeline for leachate circulation. for leaching of finer grains of ore. The leaching agent completely submerges the ore, and the concentration of the leachate is increased through repeated leaching or multi-stage leaching, thereby increasing the recovery rate. Tank leaching is usually used for higher-grade ores. Compared with heap leaching, it has the advantages of shorter leaching time and easier control of the leaching process, and is more environmentally friendly than heap leaching. Therefore, tank leachi...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/22
CPCY02P10/20
Inventor 吴爱祥张新普邓蕊王洪江杨建军王贻明顾晓春严佳龙张仪金正聪孔令洪
Owner UNIV OF SCI & TECH BEIJING
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