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Intensified gold leaching method including strong magnetic separation and pre-removal of fine silt in gold-iron oxidized ore

A gold-iron oxidation and strong magnetic separation technology, which is applied in the field of enhanced gold leaching including strong magnetic separation to remove the fine mud in gold-iron oxide ore in advance, can solve the problems of low recovery rate, low grade, high production cost, etc. Achieve the effect of low production cost, reduced adsorption and obvious effect

Active Publication Date: 2016-07-27
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method that includes strong magnetic separation to remove gold and iron oxides in advance, aiming at the deficiencies such as low recovery rate, high production cost and low grade in the existing beneficiation method of iron-gold oxide ore with high mud content. The method of intensified gold leaching technology of fine mud in ore

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  • Intensified gold leaching method including strong magnetic separation and pre-removal of fine silt in gold-iron oxidized ore

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Experimental program
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Effect test

Embodiment 1

[0038] In this embodiment, the ore feed is a certain iron-gold oxide ore in Yunnan, and the following steps are adopted to carry out the enhanced leaching of gold:

[0039] S1. After the raw ore is roughly ground by a ball mill and classified by a cyclone, the -0.074mm particle size accounts for 70%, and the FX75 cyclone is used for classification. Weak magnetic separation is carried out under the field strength to obtain strong magnetic minerals and weak magnetic separation tailings;

[0040]S2. The strong magnetic minerals obtained in step S1 are concentrated again, the concentrated return water is returned to the grinding and magnetic separation operation, and the concentrated pulp is classified, so that the -0.043mm particle size in the pulp accounts for 81%, and the particles of unqualified particle size enter Ball mill for regrinding. Add lime to the overflow of the cyclone to adjust the pH value of the slurry to 11, the concentration of the slurry is 25%, add sodium cy...

Embodiment 2

[0046] In this embodiment, the ore feed is a certain iron-gold oxide ore in Sichuan, and the following steps are adopted to carry out the enhanced leaching of gold:

[0047] S1. After the raw ore is roughly ground by a ball mill and classified by a spiral classifier, the -0.074mm particle size accounts for 75%; the spiral classifier is used for the classification operation, and the classifier overflows and removes slag in a field strength of 0.3T. Weak magnetic separation is carried out under the environment to obtain strong magnetic minerals and tailings of weak magnetic separation;

[0048] S2. The strong magnetic minerals obtained in step S1 are concentrated again, and the concentrated return water is returned to the grinding and magnetic separation operation, and the concentrated pulp is classified, so that the -0.043mm particle size in the pulp accounts for 85%, and the particles of unqualified particle size enter Ball mill for regrinding. Add lime to the overflow of the...

Embodiment 3

[0053] In this embodiment, the ore feed is a certain iron-gold oxide ore in Guangxi, and the method of following steps is adopted to carry out the enhanced leaching of gold:

[0054] S1. After the ore is roughly ground by a ball mill and classified by a spiral classifier, the particle size of -0.074mm accounts for 80%. The spiral classifier is used for the classification operation. Weak magnetic separation is carried out under strong pressure to obtain strong magnetic minerals and tailings of weak magnetic separation;

[0055] S2. The strong magnetic minerals obtained in step S1 are concentrated, and the concentrated return water is returned to the grinding and magnetic separation operation, and the concentrated pulp is classified, so that the -0.043mm particle size in the pulp accounts for 85%, and the unqualified particles enter the ball mill Regrind. Add lime to the overflow of the cyclone to adjust the pH value of the slurry to 11, the concentration of the slurry is 23%, ...

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Abstract

The invention discloses a method of an intensified gold leaching technology including strong magnetic separation and pre-removal of fine silt in gold-iron oxidized ore. The method comprises the following steps: carrying out low-intensity magnetic separation on feed ore to enrich carrier mineral magnetite so as to obtain strongly magnetic mineral and low-intensity magnetic separation tailings, carrying out strong magnetic separation ore dressing on the obtained low-intensity magnetic separation tailings so as to obtain weakly magnetic mineral and non-magnetic mineral; removing the non-magnetic mineral; then respectively carrying out cyanide leaching treatment on the strongly magnetic mineral and the weakly magnetic mineral so as to respectively obtain magnetite concentrate, iron ore concentrate and gold bearing carbon. According to the invention, scientific grouping is creatively carried out on carrier minerals of gold according to different magnetism of different carrier minerals of gold, and after grouping, specific cyanide leaching treatment is carried out, and thus effectively improving the gold leaching efficiency and the gold recovery rate of cyanide leaching treatment; and the method is a beneficiation method which is remarkable in effect, low in production cost and capable of greatly improve the gold leaching efficiency, and is especially applicable to recovery of gold and iron of gold-iron oxidized ore with relatively high silt content.

Description

technical field [0001] The invention relates to a beneficiation method of iron-gold oxide ore with high fine mud content, more specifically, relates to an enhanced gold leaching method including pre-throwing fine mud in gold-iron oxide ore by strong magnetic separation. Background technique [0002] Gold has been a very important precious metal since ancient times. Due to its good physical and chemical properties, it is widely used in industries such as jewelry processing, financial reserves, aerospace and modern communications. [0003] But, along with the increase of gold mining amount, the ore that is easy to be selected is less and less at present, the difficulty that this field faces [0004] There are more and more beneficiated ore, and the gold ore that can be effectively recovered by gravity flotation is also less and less. [0005] Existing research provides the gold extraction process of refractory gold ore, for example, the Chinese patent application whose publi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30C22B11/08
CPCC22B11/08B03C1/30
Inventor 邱显扬符德贵胡真高起方汤玉和刘志斌汪泰宋登学李汉文杨德生
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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