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Mineral separation process capable of recovering micro scheelite from scheelite flotation tailings

A technology of flotation tailings and ore dressing method, which is applied in the application field of secondary utilization of mineral resources, can solve the problems that the comprehensive utilization rate of tungsten resources is less than 60%, easy to be crushed, and easy to muddy, etc., so as to improve the total recovery of ore dressing High efficiency, small dosage of chemicals, and environment-friendly effect

Inactive Publication Date: 2009-08-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although flotation can effectively separate scheelite of 19-74μm, it is difficult to achieve fine-grained (-19μm) scheelite with a single re-election process, a single flotation process and its combined re-flotation process. Effective separation of fine-grained scheelite and gangue minerals; in addition, scheelite is easy to be crushed and muddy in the process of crushing and grinding, and the content of -19μm is relatively large. Therefore, in the flotation process of scheelite, fine Grain size (-19μm) scheelite is easy to form enrichment in flotation tailings, resulting in low total recovery rate of scheelite flotation
At present, the comprehensive utilization rate of tungsten resources in my country is less than 60%, and one of the main reasons is that the micro-grained scheelite cannot be effectively recovered.

Method used

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  • Mineral separation process capable of recovering micro scheelite from scheelite flotation tailings
  • Mineral separation process capable of recovering micro scheelite from scheelite flotation tailings
  • Mineral separation process capable of recovering micro scheelite from scheelite flotation tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: After the tailings are settled, deslimed, and drug removed, 200 g / ton of sodium carbonate is added to adjust the pH value of the pulp to 9-10, 600 g / ton of water glass is added, and 100 g / ton of saponified oleic acid is added to hydrophobic After column flotation after pulping, the flotation tailing column flotation test of conventional flotation pulping (the type and amount of added reagents are the same as hydrophobic pulping, using conventional pulping) was carried out at the same time. The test results are shown in Table 1 , From the test results, it can be known that the flotation of the hydrophobic agglomeration slurry column is better than the test index of the conventional flotation slurry column flotation.

[0026] Table 1 The test results of flotation treatment of scheelite roughing tailings by adding saponified oleic acid hydrophobic agglomeration slurry and conventional flotation slurry column flotation

[0027]

Embodiment 2

[0028] Embodiment two: After the tailings are settled, deslimed, and drug removed, 200 grams / ton of sodium carbonate is added to adjust the pH value of the pulp to 9 to 10, 600 grams / ton of water glass is added, and 75 grams / ton of saponified oleic acid and Oxidized paraffin wax soap 731 (25 g / t) was used for hydrophobizing after column flotation, and the flotation tailings column flotation test was carried out at the same time as conventional flotation slurry (the type of agent is the same as the amount of hydrophobic slurry, and conventional slurry is used) , The test results are shown in Table 2. From the test results, it can be seen that the flotation of the hydrophobic agglomeration slurry column is better than the test index of the conventional flotation slurry column flotation.

[0029] Table 2 The test results of adding saponified oleic acid and 731 hydrophobic agglomeration sizing and conventional flotation sizing column flotation treatment of scheelite roughing tailin...

Embodiment 3

[0031] Embodiment three: After the tailings are settled, deslimed, and drug removed, 200 grams / ton of sodium carbonate is added to adjust the pH value of the slurry to 9 to 10, 600 grams / ton of water glass is added, and 75 grams / ton of saponified oleic acid and Oxidized paraffin wax soap 733 (25 g / t) was used for hydrophobic sizing after column flotation, and conventional flotation sizing (the type and quantity of reagents are the same as for hydrophobic sizing, and conventional sizing was used) for flotation tailings column flotation Test, the test results are shown in Table 3. From the test results, it can be seen that the flotation of the hydrophobic agglomeration slurry column is better than the test index of the conventional flotation slurry column flotation.

[0032] Table 3 The test results of adding saponified oleic acid and 733 hydrophobic agglomeration slurry and conventional flotation slurry column flotation to treat scheelite roughing tailings

[0033]

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Abstract

The invention discloses a method for recovering scheelite in microfine size fraction(-19mu m) from scheelite flotation ore tailings. The method comprises that: firstly, the ore tailings are pre-treated to eliminate the influence of remained agents and slime; secondly, the size mixing is reinforced by using hydrophobic groups which adopts the combination of oleic acid or saponified oleic acid, oxidized paraffin wax soap 731 or 733 and kerosene or diesel oil, the rotary speed of impellers is between 1,600 and 3,000rev / min during size mixing, and the size mixing time is between 10 and 20 minutes; and thirdly, by using the static column floatation equipment, the scheelite in microfine size fraction are recovered from the ore tailings. Small-scale tests show that by the combination of the sizing mixing by the hydrophobic groups and the column separation technique, the scheelite in microfine size fraction can be effectively recovered from the flotation ore tailings. The method has the advantages of short flow and low cost, and can realize the effective recovery of the microfine mineral grains((-19mu m) by the combination of the sizing mixing by the hydrophobic groups and the column floatation.

Description

[technical field] [0001] The invention belongs to the application field of secondary utilization of mineral resources, and relates to a beneficiation method for recovering microfine scheelite from scheelite flotation tailings, in particular to an efficient recovery technology for microfine (-19 μm) scheelite. [Background technique] [0002] Metal tungsten is a rare metal with a high melting point. Tungsten and its alloys have extremely important applications in modern industry, national defense and high-tech industries. At the same time, tungsten is an important strategic resource. my country has listed it as a specific mine protected by the state. kind. Developed countries such as the United States prohibit the mining of tungsten ore as an important strategic resource, and their tungsten resource consumption depends entirely on imports. [0003] Tungsten concentrates are mainly used to produce metal tungsten, tungsten carbide, tungsten alloys and their compounds. At present...

Claims

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Application Information

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IPC IPC(8): B03D1/001B03D101/02
Inventor 黄光耀冯其明欧乐明卢毅屏张国范
Owner CENT SOUTH UNIV
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