Dressing technology for recycling ultra-low-level gold ore

A process, extremely low technology, applied in the field of beneficiation process of oxidized gold ore, can solve the problem of high beneficiation cost

Active Publication Date: 2015-01-28
CHINA NERIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mainly used to recover gold ore with a grade of 0.8 to 1.0g / t, but for gold ores with a grade below 0.4g / t, the cost of beneficiation is relatively high

Method used

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  • Dressing technology for recycling ultra-low-level gold ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The beneficiation process of the present invention that can effectively recover extremely low-grade gold ore is composed of an ore washing and screening system, a slime treatment system, a carbon leaching system and a heap leaching system. The specific implementation process is as follows:

[0025] Ore washing and screening system: The raw ore with a maximum size of 800mm from the stope is directly sent to the bar sieve (1) for ore washing and screening without being crushed, and the ore under the bar sieve (1) is less than 180mm into the double The first-layer vibrating screen (2) washes the ore again, and the ore less than 6mm under the double-layer vibrating screen (2) is sent to the high-frequency fine screen (3) for further washing and screening;

[0026] Ore slime treatment system: The ore less than 2mm under the high-frequency fine screen (3) enters the spiral classifier (4) for classification; the sand returned from the spiral classifier (4) enters the first stag...

Embodiment 2

[0031]The beneficiation process of the present invention, which can effectively recover extremely low-grade gold ore, is implemented as follows: in addition to roughing and sweeping spiral concentrators (5), (6) and roughing and sweeping spiral chutes (9), ( 10) Except for roughing and sweeping Nelson concentrators (5), (6) and roughing and sweeping Nelson concentrators (9), (10), everything else is the same as in embodiment 1.

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Abstract

The invention provides a dressing technology for recycling ultra-low-level gold ore. The dressing technology for recycling the ultra-low-level gold ore is composed of an ore washing and screening system, a slime processing system, a carbon leaching system and a dump leaching system, wherein the technological raw ore is directly screened and washed, the ore sand is subjected to dump leaching, the slime is subjected to the stage classification, stage reelecting recycling particle minding and the carbon leaching, gold concentrate, dump leaching gold loaded carbon and carbon leaching gold loaded carbon of a first segment reelecting returning path and a second segment reelecting returning path are obtained, and the reelecting gold concentrate and the gold loaded carbon are sent to a gold melting plant for treatment to obtain gold ingot. According to the dressing technology, the oxidized gold ore with the gold content of the raw ore being under 0.4g/t and the mud content being above 25% is adopted, the gold dressing recycling rate reaches above 75%, the ultra-low-level gold ore resource is fully used, the gold ore resource is enlarged, the water returning use is strengthened in all steps, the corresponding work is returned according to the water returning quality, water is saved, and the ore per unit consumes under 0.23m3/t of water.

Description

[0001] technical field [0002] The invention relates to a beneficiation process for recovering extremely low-grade gold ore, in particular to a beneficiation process for effectively recovering oxidized gold ore with extremely low grade and high mud content, and belongs to the technical field of beneficiation. Background technique [0003] Gold is an important strategic resource and strategic reserve of the country, and it is also one of the earliest metals discovered, developed and utilized by mankind. The commonly used methods for recovering gold ore mainly include flotation, gravity separation, heap leaching, carbon leaching and the combination of various processes. For example, the patent "a low-grade oxidized gold mineral processing method" (CN03111966.2) discloses a mineral processing method that can effectively improve the recovery of low-grade oxidized gold ore with high mud content and coarse-grained gold. There are three processes of leaching, gravity separation a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00C22B11/00
CPCB03B7/00C22B11/00Y02P10/20
Inventor 肖春莲
Owner CHINA NERIN ENG
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