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Spray device for heap-leaching field and spray technology therefor

A technology of heap leaching and spraying pipes, which is applied in the field of multi-line heap leaching field spraying devices and processes, intermittent and alternating, and can solve the problems of high metal concentration in leachate, high oxygen content in ore piles, and good spray uniformity. , to achieve the effects of reducing energy consumption and chemical reagent consumption, increasing metal concentration, and increasing leaching rate

Active Publication Date: 2015-03-11
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above situation, the purpose of the present invention is to provide a heap leaching field spraying machine with good uniformity of liquid distribution and spraying, high oxygen content in the ore heap, low energy consumption, small amount of waste water, high metal concentration in the leach solution, and can significantly improve the metal leaching rate. Leaching device and process to solve many deficiencies of the existing liquid distribution system and process in heap leaching field

Method used

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  • Spray device for heap-leaching field and spray technology therefor
  • Spray device for heap-leaching field and spray technology therefor
  • Spray device for heap-leaching field and spray technology therefor

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specific Embodiment approach

[0030] When spraying with an intermittent, alternating, multi-line heap leaching field spray device and process provided by the patent of the present invention, first open the switching valve controlling main pipe I, close the switching valve controlling main pipe II, and spray for 6 hours Finally, close the switching valve controlling the main pipe I, open the switching valve controlling the main pipe II, and spray for another 6 hours. During the entire spraying process, the switch between the two switching valves has been repeated. The working pressure of the immersion liquid in the main pipe is controlled at 0.5 MPa, and the spray intensity is controlled at 12 L m -2 h -1 , the droplet diameter is controlled between 0.3-0.4 mm.

[0031]The invention patent provides an intermittent, alternating, multi-line heap leaching field spraying device and process to spray a uranium ore pile with a scale of 5264 t, which significantly improves the leaching efficiency and reduces the t...

Embodiment 1

[0033] Example 1, this patent has been applied to a heap leaching uranium mine in my country after a small test and an expanded test. The uranium ore pile: length × width × height = 52 × 18.2 × 3m, the ore loading capacity is 5264 t, and the uranium grade is 0.198%. The leaching solution is 20 g / L sulfuric acid solution, which is pumped to the high-level tank by a centrifugal pump, and the leaching solution flows out from the high-level tank, and the flow of the leaching solution is controlled through a valve. Turn off the switching valve of pipe I, close the switching valve controlling main pipe II, spray for 6 hours, then close the switching valve controlling main pipe I, open the switching valve controlling main pipe II, and spray for another 6 hours. During the process, the switch between the two switching valves has been repeated. The working pressure of the leaching solution in the main pipe is controlled at 0.5 MPa, and the spraying intensity is controlled at 12 L m -2...

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Abstract

The invention provides a spray device for a heap-leaching field and a spray technology therefor. The spray device for a heap-leaching field is a batch-type, alternating and multi-strand spray device for a heap-leaching field. The spray device for a heap-leaching field comprises a centrifugal pump, a leaching agent tank, a high-level pond, a valve, a flowmeter, two conversion valves, a main pipe I, a main pipe II, an ore pile and leaching spray pipes. The spray technology for the spray device provided by the invention comprises the following steps that a leaching solution is fed into the high-level pond by the centrifugal pump; the leaching solution flows out from the high-level pond, wherein the flow of the leaching solution is controlled by the valve; after passing through the flowmeter, the leaching solution passes through the two conversion valves, then enters into the main pipe I and the main pipe II respectively and then flows into the leaching spray pipes respectively; and at the top of a heap-leaching field, the leaching solution in the leaching spray pipes is sprayed out, then passes through the heap-leaching field from top to bottom and then is accumulated in the leaching agent tank at the bottom of the heap-leaching field. The spray device for a heap-leaching field and the spray technology therefor have the advantages of simple processes, low cost, convenient and flexible operation, low energy consumption, small environmental risk, good spray uniformity, small spray density, and good mineral leaching effects, and are suitable for heap leaching of copper ore, gold ore, uranium ore and the like.

Description

technical field [0001] The invention relates to a spraying device and process used in a heap leaching process in solution mining, in particular to an intermittent, alternating, multi-line heap leaching field spraying device and process. Background technique [0002] Solution mining is a mining method that selectively dissolves, leaches and recovers useful components in ore deposits, ore or waste rocks by using certain chemical solvents and microorganisms based on physical and chemical principles. Solution mining fundamentally changes the conventional mining process and simplifies the mining, dressing and smelting processes. Therefore, this technology has developed rapidly at home and abroad, especially in the mining of rare metals such as gold, copper, and uranium, and the proportion of mining is increasing. [0003] The surface heap leaching method is the most widely used and successful method in solution mining. It refers to spraying the leachant on the ore or waste rock ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B3/02
Inventor 丁德馨张绍锡胡南陈祥标李广悦叶勇军王成朱曙光张宝俊易法清黄齐金李建平杨茂志邓建国
Owner NANHUA UNIV