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A kind of enhanced leaching method of gold in magnetite

A technology for strengthening leaching and magnetite, which is applied in the field of strengthening leaching of gold in magnetite or maghemite as the gold-carrying mineral, and can solve the problem of low gold leaching rate, high leaching slag grade, and easy sinking of gold-carrying minerals. It can solve problems such as improper grinding particle size, etc., to achieve good leaching effect, solve low leaching rate, and improve leaching rate and recovery rate.

Active Publication Date: 2017-02-08
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is aimed at the technical defects existing in the existing difficult-to-grind, high-density gold-bearing magnetite leaching method, including the magnetite easy sinking tank and the gold-bearing mineral caused by improper grinding particle size during the leaching process. To solve technical problems such as low gold leaching rate and high leaching slag grade, a method for intensified leaching of gold in magnetite is provided

Method used

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  • A kind of enhanced leaching method of gold in magnetite

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Effect test

Embodiment 1

[0034] The ore fed in this embodiment is gold-bearing magnetite in a certain place in Guangzhou, China. The enhanced leaching of gold is carried out using the following steps:

[0035] S1. The gold-bearing magnetite raw ore in a certain place in Guangzhou, China is classified by a ball mill grinding FX200 cyclone to obtain the ore to be processed, of which -0.074mm particle size accounts for 70%;

[0036] S2. carry out weak magnetic separation after step S1 gained to-be-processed ore is deslagging through hydrocyclone classification, and magnetic field strength is 150mT, obtains the gold-loaded magnetite of strong magnetism containing gold; Now gold in magnetite The grade is 2g / t;

[0037] S3. The strong magnetic mineral magnetite obtained in step S2 is concentrated by an inclined plate thickener and then classified so that -0.043 accounts for 81.40%. It is a mineral with a qualified particle size, and the unqualified particle size can be re-grinded by a ball mill and then cl...

Embodiment 2

[0043] The ore fed in this embodiment is a gold mine in a certain place in Yunnan, China, and the main gold-bearing minerals are magnetite and maghemite. The enhanced leaching of gold is carried out using the following steps:

[0044] S1. The raw ore of a gold mine in a certain place in Yunnan, China is classified by a ball mill, a grinding screw classifier, and a mineral material to be processed is obtained, of which -0.074mm particle size accounts for 70%;

[0045] S2. carry out weak magnetic separation after the slag removal after step S1 gained to-be-processed mineral material is classified by hydrocyclone, and magnetic field strength is 160mT, obtains the gold-bearing magnetite of strong magnetism containing gold; Now gold in magnetite The grade is 2.2g / t;

[0046] S3. The strong magnetic mineral magnetite gained in step S2 is graded after being concentrated by an inclined plate thickener so that -0.043 accounts for 81.40%, which is a mineral with a qualified particle si...

Embodiment 3

[0051] The ore fed in this embodiment is a gold-bearing ore in a certain place in Shandong, and the main gold-carrying mineral is magnetite. The enhanced leaching of gold is carried out using the following steps:

[0052] S1. The raw ore of a gold mine in a certain place in Shandong, China is ground by a ball mill and classified by an FX200 cyclone to obtain the ore to be processed, of which -0.074mm particle size accounts for 70%;

[0053] S2. carry out weak magnetic separation after step S1 gained to-be-processed ore is deslagging after hydrocyclone classification, and magnetic field strength is 145mT, obtains the gold-bearing magnetite of strong magnetism containing gold; Now gold in magnetite The grade is 1.98g / t;

[0054] S3. The strong magnetic mineral magnetite gained in step S2 is graded after being concentrated by an inclined plate thickener so that -0.043 accounts for 81.40%, which is a mineral with a qualified particle size, and those with an unqualified particle s...

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Abstract

The invention discloses a reinforced leaching method of gold in magnetite. The method comprises the following steps: grinding gold-containing raw magnetite, grading to obtain the mineral material to be treated, carrying out low-intensity magnetic separation on the mineral material to be treated to obtain an alloy-containing strongly magnetic mineral, carrying out concentration and grading on the strongly magnetic mineral, grinding to obtain the mineral in which the particles with the particle size of -0.043mm account for 80.00-85.00%, and carrying out cyanation leaching treatment. The two-stage grinding technique is creatively adopted to enhance the grinding fineness, thereby avoiding the tank deposition of the magnetite due to high specific gravity, obviously enhancing the leaching rate of the magnetite-associated gold by opening the inclusion, further accurately determining the stirring intensity, leaching time and other key conditions, and ensuring the gold leaching rate of the gold-bearing magnetite to be not lower than 94%. The grade of gold in the leaching slag is down to 0.092 g / t and is not higher than 0.1 g / t, thereby well solving the technical problems of low leaching rate of gold in the magnetite, high grade of gold in the leaching slag and the like. The energy consumption is lower.

Description

technical field [0001] The invention relates to a beneficiation method of gold-carrying minerals, more specifically, to a method for intensified leaching of gold in magnetite or maghemite as the gold-carrying mineral. Background technique [0002] Due to long-term large-scale gold mining, the grade of gold ore dressing in my country has been declining year by year, and the properties of gold ore are relatively complex, especially the leaching of gold from magnetite. Due to the particularity of magnetite properties, conventional magnetite The leaching effect of medium gold is not good. [0003] Due to the high density of magnetite, and mostly in the form of granular aggregates, it is very easy to sink or block during the cyanidation leaching process. Therefore, the leaching rate of gold leaching in magnetite is lower, and the grade of gold in the leaching residue is higher. [0004] The Chinese patent application whose publication number is CN101225467 discloses a method for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/08C22B3/04C22B3/24C22B1/00
CPCC22B1/00C22B3/04C22B3/24C22B11/04C22B11/08Y02P10/20
Inventor 邱显扬胡真宋宝旭汤玉和李汉文汪泰邹坚坚付华李沛伦王成行
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI