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Method for selecting sulfur from tailings discarded by mineral separation

A technology for selecting sulfur and tailings, which is applied in chemical instruments and methods, wet separation, solid separation, etc., and can solve problems such as the inability of sulfur production to meet market demand, the lack of development and utilization of tailings resources, and the lack of pricing power. , to achieve the effect of considerable economic benefits, saving pharmaceutical costs, and increasing sales prices

Inactive Publication Date: 2009-11-18
BAIYIN NONFERROUS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking sulfur as an example, China has a cumulative shortage of 1.8 million tons of resources, but China has no say in the pricing of resource prices in the international market. If the country does not introduce corresponding measures, the price of sulfur will continue to rise. Although the increase will be reduced, the price of sulfur High prices will inevitably drive related sulfur ore prices
The average price of sulfur concentrate with a grade of 40% was about 170 yuan / ton in 2008. At present, the output of sulfur is far from meeting the growing market demand
[0004] To sum up, on the one hand, the supply of sulfur is insufficient; on the other hand, tailings resources containing sulfur cannot be rationally developed and utilized, occupying a large amount of land and causing serious environmental pollution

Method used

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  • Method for selecting sulfur from tailings discarded by mineral separation
  • Method for selecting sulfur from tailings discarded by mineral separation
  • Method for selecting sulfur from tailings discarded by mineral separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] See figure 1 :A method for selecting sulfur from tailings discharged from beneficiation, including the following steps:

[0035] 1) Feed the ore, send the tailings raw ore after beneficiation to the plate feeder through the hopper, and then transport it to the ball mill through the belt conveyor;

[0036] 2) Ball mill, the raw ore slurry obtained after grinding the tailings raw ore sent to the ball mill is sent to the mixing tank; the process conditions are: the raw ore input of the ball mill is 32t / h, and the amount of water added is about 52m 2 / h, the grinding fineness is 200 mesh, and the discharge concentration is 39%;

[0037] 3) Stir, the mixing bucket will stir the raw ore slurry evenly and send the evenly stirred slurry to the 6-S shaker;

[0038] 4) For ore dressing, the slurry is separated by a 6-S shaker to separate the concentrate grade from other substances. The process conditions are: back tilt angle α=2°, angle β between bed surfaces 40°, shaker stroke 28mm...

Embodiment 2

[0044] 1) To mine, the same as Example 1;

[0045] 2) Ball mill, the raw ore slurry obtained after grinding the tailings raw ore sent to the ball mill is sent to the mixing tank; the process conditions are: the raw ore input of the ball mill is 30t / h, and the water addition is about 49m 2 / h, the fineness of ore grinding is 200 mesh, and the concentration of ore discharge is 40%;

[0046] 3) Stirring, same as in Example 1;

[0047] 4) Ore beneficiation, the slurry is separated by 6-S type shaking table to separate the concentrate grade from other substances. The technological conditions are: back tilt angle α = 1°, angle β between bed surfaces 42°, and shaker stroke 15mm, 260 strokes / minute; flushing water volume 1T / set H. Obtained sulfur concentrate mines with a sulfur grade of 50%, middle mines with a sulfur grade of 16%, and tailings mines with a sulfur grade of 4%;

[0048] Others are the same as in Example 1.

Embodiment 3

[0050] 1) To mine, the same as Example 1;

[0051] 2) Ball mill, the raw ore slurry obtained after grinding the tailings raw ore sent to the ball mill is sent to the mixing tank; the process conditions are: the raw ore input of the ball mill is 31t / h, and the water volume is about 48m 2 / h, the fineness of grinding is 200 mesh, and the discharge concentration is 38%;

[0052] 3) Stirring, same as in Example 1;

[0053] 4) Ore beneficiation, the slurry is separated by 6-S type shaking table to separate the concentrate grade from other substances. The technological conditions are: back tilt angle α = 1°, angle β between bed surfaces 42°, and shaker stroke 34mm, 240 strokes / minute; the slurry concentration is 20-30%, and the flushing water volume is 0.7-1T / set H. Obtained a sulfur concentrate mine area with a sulfur content of 42%, a middle mine area with a sulfur content of 12% and a tailing mine area with a sulfur content of 4%;

[0054] Others are the same as in Example 1.

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Abstract

The invention relates to a method for selecting sulfur from tailings discarded by mineral separation, comprising the following steps of: 1) sending tailings crude ore after mineral separation to a plate-type rock feeder by a funnel, and then conveying the tailings crude ore to a ball mill by a belt conveyer; 2) sending crude ore pulp obtained after the tailings crude ore conveyed to the ball mill is ground to an agitating vessel, wherein the crude ore feeding amount of the ball mill is 30 to 32t / h, the water-adding amount is about 48 to 52m / h, the grinding fineness is 200 meshes, and the ore discharge concentration is 35 to 40 percent; 3) stirring, wherein the agitating vessel uniformly agitates the crude ore pulp and then sends the uniformly agitated ore pulp to a shaking bed; and 4) carrying out mineral separation, wherein the shaking bed classifies and selects the ore pulp so as to cause concentrate grade to be separated from other substances, thus obtaining a pyrite concentrate mining area with the sulfur-containing grade of 40 to 50 percent, a middle mining area with the sulfur-containing grade of 9 to 16 percent, and a tailings mining area with the sulfur-containing grade of below 4 percent; and for a 6-S type shaking bed, the backward elevation angle alpha is 1 to 2 degrees, the included angel between bed surfaces is 40 to 42 degrees, the shaking bed stroke is 10 to 34mm, an the stroke frequency is 240 to 280 times per minute. The method requires no adding of medicaments, saves electricity, and has low cost and the pyrite concentrate grade of 40 to 50 percent.

Description

Technical field [0001] The invention belongs to a method for beneficiating tailings, in particular to a method for beneficiating sulfur from tailings discharged from beneficiation. Background technique [0002] The raw material selected for this project is tailings discarded after ore dressing. The original reserve is about 25.3 million tons, and it is increasing by one million tons every year. This waste tailings contains sulfur, and the traditional method of selecting sulfur from the waste tailings is flotation. Due to the mining of tailings resources for many years, the tailings currently used for sulfur separation have a low grade of raw ore, with a sulfur grade of 7-10%, a large mud content and many mineral impurities. The traditional flotation method is used for production. The production cost of Xanthan and No. 2 oil is high, and the grade of the selected sulfur concentrate is low, only about 30%, which does not meet the national standard of 35%. [0003] For many years, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B5/04
Inventor 花斌张玉莲刘全喜南小江赵世华黄伟
Owner BAIYIN NONFERROUS GROUP