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Beneficiation method for comprehensively recovering magnetite from cyanide tailings

A mineral processing method and a technology of cyaniding tailings, which are applied in the mineral processing field of magnetite recovery and comprehensive recovery of magnetite, can solve the problems of damage to the mine's due interests and poor magnetite recovery effect, and achieve the benefits of Effects of large-scale promotion, improvement of yield and recovery rate, and improvement of recovery rate

Active Publication Date: 2019-05-03
鹤庆北衙矿业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to solve the problem that the recovery effect of magnetite in gold and silver mines is poor, and a large amount of magnetite enters limonite and tailings and can only be disposed of at a low price, resulting in damage to the mine's due interests , to provide a beneficiation method for comprehensive recovery of magnetite from cyanide tailings, to achieve comprehensive comprehensive recovery of magnetite

Method used

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  • Beneficiation method for comprehensively recovering magnetite from cyanide tailings
  • Beneficiation method for comprehensively recovering magnetite from cyanide tailings
  • Beneficiation method for comprehensively recovering magnetite from cyanide tailings

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Embodiment 1

[0039] Embodiment 1 A kind of beneficiation method of comprehensively recovering magnetite from cyanide tailings

[0040] 1. Mineral processing method

[0041] The ore in this embodiment is the cyanidation tailings of oxidized ore-type gold mines in a certain place of Yunnan Gold Group, wherein the iron grade in the cyanide tailings is 32.61%. Such as figure 2 Shown, adopt the method for following steps to carry out the recovery of magnetite:

[0042] S1. Weak magnetic roughing: Grind the cyanide tailings obtained after cyanide leaching until the ore fineness is -0.043mm, accounting for 82.36%, and then directly carry out weak magnetic roughing through a 0.22T weak magnetic field to obtain weak Magnetic rougher concentrate and weak magnetic rougher tailings;

[0043] S2. Weak magnetic scavenging: performing weak magnetic scavenging operation on the weak magnetic roughing tailings obtained in step S1 in a 0.33T weak magnetic field to obtain weak magnetic scavenging concentr...

Embodiment 2

[0050] Embodiment 2 A kind of beneficiation method of comprehensively recovering magnetite from cyanide tailings

[0051] 1. Mineral processing method

[0052] The ore in this embodiment is the cyanidation tailings of oxidized ore-type gold mines in a certain place of Yunnan Gold Group, wherein the iron grade in the cyanide tailings is 37.81%. Such as figure 2 Shown, adopt the method for following steps to carry out the recovery of magnetite:

[0053] S1. Weak magnetic roughing: Grind the cyanide tailings obtained after cyanide leaching until the ore fineness is -0.043mm, accounting for 91.56%, and then directly carry out weak magnetic roughing through a 0.3T weak magnetic field to obtain weak Magnetic rougher concentrate and weak magnetic rougher tailings;

[0054] S2. Weak magnetic scavenging: the weak magnetic roughing tailings obtained in step S1 are subjected to weak magnetic scavenging operations in a 0.4T weak magnetic field to obtain weak magnetic scavenging concen...

Embodiment 3

[0072] Embodiment 3 different magnetic field strength magnetic separation test

[0073] 1. The influence of different magnetic field strengths on the magnetic separation of cyanide tailings

[0074] Weak magnetic separation tests were carried out on cyanide tailings under the conditions of magnetic field strengths of 0.3T, 0.35T, and 0.4T, and the test results are shown in Table 2.

[0075] Table 2 Magnetic separation test results under different magnetic field strengths

[0076]

[0077] As can be seen from the test results in Table 2, increasing the magnetic field strength increases the magnetite concentrate production rate and recovery rate to a certain extent, but the increase is small, indicating that for the finer cyanide tailings of the grinding, the method of increasing the magnetic field strength is also more effective. It is difficult to achieve better recovery of magnetite.

[0078] 2. The influence of different magnetic field strengths on the magnetic separati...

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Abstract

The invention discloses a beneficiation method for comprehensively recovering magnetite from cyanide tailings. The method includes steps of weak magnetic roughing, weak magnetic scavenging, strong magnetic roughing, strong magnetic scavenging, weak magnetic concentration, and strong magnetic concentration. The method, under the condition of less modifying a conventional beneficiation plant and achieving a low modification cost, avoids calcinations of magnetic separation tailings by means of the prior and subsequent grading and matching design of the reasonable strong and weak magnetic field, and on the premise of recovering the gold to the utmost extent, not only can ensure an iron grade, but also can greatly improve the yield and recovery rate of the magnetite, maximizes a resource value,and achieves a high commercial promotional value. The method solves the technical problem that gold and iron are simultaneously present in the ore and the cyanide leaching of gold and silver requiresvery fine feed particle size which may seriously affect the magnetic separation and recovery of iron if the feed particle size is fine to a certain extent, which makes it difficult to separate the magnetite in physical beneficiation and difficult to obtain a magnetite concentrate and a brown iron concentrate with high recovery rates and qualified iron grade contents.

Description

technical field [0001] The invention belongs to the technical field of mineral processing. Specifically, it relates to a beneficiation method for comprehensively recovering magnetite from cyanidation tailings. More specifically, it relates to a beneficiation method for recovering magnetite from leaching cyanidation tailings of gold-bearing maghemite with finer grinding fineness. Background technique [0002] For gold mines, full-slime cyanidation leaching is still the main treatment process for gold-bearing oxidized ores, and cyanide tailings are the main solid waste. In the gold smelting industry, the recovery of valuable metals in the cyanide tailings produced has always been a major problem in the gold smelting industry. The valuable metals in cyanide tailings are mainly copper, iron and other metals. For the valuable metals in tailings, enterprises often recycle them as auxiliary products. Since the value of auxiliary products is relatively low, additional The recycli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/02
Inventor 龚明辉高起方聂祖明杨凯志尹福兴汪泰吴忠仙汪勇胡真祁磊宋宝旭郑宇光王成行杨伟甲陈忠邹坚坚李汉文李沛伦姚艳清丘世澄
Owner 鹤庆北衙矿业有限公司
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