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Method for comprehensively recovering valuable metal minerals from scheelite tailings

A valuable metal, tailings technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of poor recovery capacity, waste of resources, low tungsten recovery rate, etc., to achieve strong ore adaptability, improve Economic benefits, the effect of simple recycling methods

Active Publication Date: 2019-04-16
HUNAN SHIZHUYUAN NON FERROUS METAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Conventional scheelite tailings recycling tungsten technology usually uses fatty acid collectors, which will cause three major disadvantages: 1. The ability of fatty acid collectors to recover other valuable metal minerals such as black tungsten and cassiterite associated in tailings poor, leading to the co-associated valuable metal minerals such as wolframite and cassiterite in the tailings cannot be recovered; 2. The selectivity of fatty acid collectors to calcium-containing minerals such as scheelite, calcite and fluorite is poor, resulting in normal temperature floating The grade of the selected tungsten coarse concentrate is low, resulting in too much heating time and high cost; 3. The common associated fluorite in scheelite tailings cannot be utilized, because fluorite will remain in the heating process during the heating process. In the tailings, but a large amount of water glass added during the heating process causes the fluorite to be inhibited and cannot be recycled
In addition, in the prior art, the recovery rate of tungsten in scheelite tailings is not high, resulting in a certain waste of resources

Method used

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  • Method for comprehensively recovering valuable metal minerals from scheelite tailings
  • Method for comprehensively recovering valuable metal minerals from scheelite tailings
  • Method for comprehensively recovering valuable metal minerals from scheelite tailings

Examples

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Embodiment 1

[0033] like figure 1 As shown, a method for recovering valuable metal minerals from scheelite tailings, scheelite tailings from a certain place in Hunan, tungsten grade WO3 0.09%, according to WO 3 Calculated, scheelite: black tungsten is 7:3, and the fine-grained tungsten of -0.038mm in the tailings accounts for 73% of the total tungsten, and the gangue is mainly calcium aluminum garnet, iron aluminum garnet, quartz, fluorite, horn Amphiboles and a small amount of calcite, clay minerals and cassiterite, among which the fluorite grade is CaF 2 20.36%, cassiterite grade Sn is 0.12%, the method comprises the following steps:

[0034] (1) Adjust the pH of the scheelite tailings slurry to 8.5-9.5, add 260g of lead nitrate and benzohydroxamic acid mixed collector (the mass ratio of lead nitrate and benzohydroxamic acid is 0.8:1), and stir for 5 minutes The rougher foam and rougher tailings were obtained by air-inflated rougher, and the mixed collector was added to the rougher tai...

Embodiment 2

[0044] A method for recovering valuable metal minerals from scheelite tailings, scheelite tailings from a certain place in Gansu scheelite tailings, wherein the tungsten grade WO 3 0.13%, according to WO 3 Calculated, scheelite: black tungsten is 9.2:0.8, and the fine-grained tungsten of -0.038mm in the tailings accounts for 68% of the total tungsten, and the gangue is mainly quartz, fluorite, tremolite, diopside, and chlorite , fushanite, epidote and garnet, mica, feldspar, calcite, apatite, etc., of which the grade of fluorite is CaF 2 is 28.15%. Since the ore does not contain cassiterite, the recovery of cassiterite will no longer be implemented. The method mainly includes the following steps:

[0045] (1) Adjust the pH of the scheelite tailings slurry to 9.0-9.6, add 310g of lead nitrate and benzohydroxamic acid mixed collector (the mass ratio of lead nitrate and benzohydroxamic acid is 1.4:1), and stir for 5 minutes The rougher foam and rougher tailings were obtained af...

Embodiment 3

[0054] A method for recovering valuable metal minerals from scheelite tailings, the scheelite tailings of a certain place in Yunnan, wherein the tungsten grade WO 3 0.10%, according to WO 3 Calculated, scheelite: black tungsten is 8:2, and the fine-grained tungsten of -0.038mm in the tailings accounts for 75% of the total tungsten, and the gangue is mainly pyroxene, quartz, garnet and a small amount of calcite, fluorite, cassiterite and Pyrrhotite, etc., of which the grade of fluorite is CaF 2 16.24%, cassiterite grade Sn is 0.15%, the method comprises the following steps:

[0055] (1) Adjust the pH of the scheelite tailings slurry to 9.5-9.8, add 280g of lead nitrate and benzohydroxamic acid mixture collector (the mass ratio of lead nitrate and benzohydroxamic acid is 1:1), and stir for 5min After airing roughing to get roughing foam and roughing tailings, adding collector to the roughing tailings for two sweeps, the amount of collector used in the two sweeps is 60g and 40g...

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Abstract

The invention discloses a method for comprehensively recovering valuable metal minerals from scheelite tailings. The method comprises the following steps of (1) adjusting the pH value of the ore pulpof scheelite tailings to 8.0-9.8, adding a collecting agent to carry out roughing and blank concentrating to obtain rough concentrate, adding the collecting agent into the roughing tailings to carry out twice scavenging; (2) carrying out strong magnetic concentrating on the rough concentrate to obtain wolframite rough concentrate and strong magnetic tailings, and carrying out twice blank concentrating on the wolframite rough concentrate to obtain wolframite concentrate; (3) carrying out concentrating and settling reagent-removing on the strong magnetic tailings; (4) adjusting the concentrationof the ore pulp subjected to concentrating and reagent-removing to 55-56%, adding collecting agent and an inhibitor, heating and preserving heat, and then carrying out heating roughing and blank concentrating to obtain the tungsten concentrate, carrying out heating roughing on tailings to perform scavenging, and scavenging foam concentrates to return to heating roughing. According to the method,a new concept of asynchronous flotation is adopted, so that high-efficiency recovery of the fine tungsten particles in the tungsten tailings can be realized, meanwhile, other valuable metal minerals such as the wolframit and cassiterite can be recycled.

Description

technical field [0001] The invention belongs to the field of mineral recovery, in particular to a method for recovering tungsten ore. Background technique [0002] Tungsten is a strategic rare metal with high melting point, high hardness, and high corrosion resistance. It is widely used in aerospace, machinery industry, smelting and chemical industries, etc., so it has a high status in national economic production and life. Scheelite accounts for about 70% of the total mineable tungsten resources in the world. Compared with wolframite, which is magnetic and easy to select, the development of scheelite is relatively difficult, because scheelite is a calcium-containing mineral and non-magnetic, and it often coexists with other calcium-containing minerals such as calcite and fluorite , due to the similar physicochemical properties of tungsten and these calcium-containing mineral surfaces, it is difficult to separate them. [0003] In actual production, the most common way to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 孙伟王建军陈克锋谢加文胡岳华韩海生陈玉林龙冰刘润清曹登国
Owner HUNAN SHIZHUYUAN NON FERROUS METAL