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Biological oxidation leaching recycling technology for heap leaching tailings

A technology of biological oxidation and microbial leaching, which is applied in the field of tailings recovery, can solve the problems of leaching the required substances, and the leaching and recovery technology is not perfect, and achieves the effects of low production cost, low capital construction cost, and low culture cost.

Active Publication Date: 2019-08-13
JIANGXI SANHE GOLD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing heap leaching tailings leaching recovery technology is not perfect enough. There are many kinds of microorganisms in the existing bioleaching process. Many microorganisms have the functions of dissolving, oxidizing, and adsorbing metals, which cannot maximize the leaching of the required substances. limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A heap leaching tailings biological oxidation leaching recovery process, the heap leaching tailings biological oxidation leaching recovery process comprises: a heap leaching method, a microorganism cultivation method and a biological leaching method.

[0014] Preferably, the heap leaching method is as follows: using the slope terrain; stacking large ore to be processed on an impermeable foundation to form an ore heap, setting a spray pipeline on the surface of the ore heap, and spraying continuously or intermittently into the ore heap The microbial leaching agent is used for leaching, and a liquid collection tank is built on the lower side to collect the leachate.

[0015] Preferably, the microbial culture method is as follows: subpackage the culture medium with adjusted pH value in sterilized clean triangular flasks for shallow culture, take 1-10mL mine water or several sections of rock cores or slime into the bottles and Measure and adjust the pH value, and then place...

Embodiment 2

[0017] The difference from Example 1 is that the bioleaching method includes: a microbial leaching method for low-grade copper and uranium ores and a microbial leaching method for low-grade gold and silver ores.

[0018] Preferably, the microbial leaching method for low-grade copper and uranium ores is as follows: during the leaching process, use a peristaltic pump to control the flow of the leachate, and use a single-point drip irrigation method to spray the liquid; The bacterial leaching solution produced by leaching the ore, after the ion exchange column adsorbs uranium and copper, the resulting adsorption tail liquid is used to cultivate bacteria, and the cultured bacteria are then used to leaching the ore.

[0019] Preferably, the microbial leaching method of low-grade gold and silver ores is as follows: similar to the microbial leaching method of the above-mentioned low-grade copper and uranium ores, during the leaching process, a peristaltic pump is used to control the f...

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Abstract

The invention discloses a biological oxidation leaching recycling technology for heap leaching tailings. The technology includes a heap leaching method, a microbial cultivation method and a bioleaching method. The beneficial effects of the technology are as follows: the method utilizes microorganisms such as thiobacillus ferrooxidans to leach metal in ores, the largest advantage of the microorganisms is that the required energy of the growth of the microorganisms is taken from the sulfur and iron in liquefied minerals, and a small amount of nutrient compositions such as nitrogen and phosphorusis extra added, so that cultivation costs can be low, and competitors do not grow during the growth of the microorganisms, so that disinfection treatment is not needed; sulfuric acid and ferric sulfate which are formed after a sulfide mineral is oxidized are a strong oxidizing agent and solvent of some metal or metal minerals, so that the bacteria are suitable for leaching copper, uranium, zinc,cobalt, nickel and other sulfide ores and some oxidized ores; and when the bacteria are used to leach these low grade ores, production costs can be low (which are only 1 / 3-1 / 2 of conventional methods), and capital construction costs can be saved (which are only 1 / 5-1 / 4 of the conventional methods), so that good economic benefits can be achieved.

Description

technical field [0001] The invention relates to a biological leaching process, in particular to a biological oxidation leaching recovery process for heap leaching tailings, belonging to the technical field of tailings recovery. Background technique [0002] Bioleaching is a beneficiation method that extracts useful metals from ores by microorganisms. It utilizes the oxidation and reduction characteristics of microorganisms in their life activities to oxidize or reduce useful components in resources, and oxidizes or reduces the useful components in the resources. Separation in a cleaner manner than heap leaching with cyanide. Bioleaching is an application of hydrometallurgy. [0003] The existing heap leaching tailings leaching recovery technology is not perfect enough. There are many kinds of microorganisms in the existing bioleaching process. Many microorganisms have the functions of dissolving, oxidizing, and adsorbing metals, which cannot maximize the leaching of the req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18
CPCC22B3/18
Inventor 陈发上吴为荣陈建福涂友兵陈宇赖惠斌
Owner JIANGXI SANHE GOLD IND
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