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Method for detecting the magnetism of weakly-magnetic mineral

A detection method and weak magnetic technology, applied in the direction of magnetic performance measurement, etc., can solve the problems of lack of equipment and devices, high precision requirements for balances and ammeters, etc.

Inactive Publication Date: 2016-01-20
취저우화여우코발트뉴머터리얼컴퍼니리미티드 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The mass-kinetic method includes the ancient law and the Faraday method. Generally, a magnetic balance is used, and the precision of the balance and the ammeter is high. The general test site lacks such equipment and devices.

Method used

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  • Method for detecting the magnetism of weakly-magnetic mineral
  • Method for detecting the magnetism of weakly-magnetic mineral
  • Method for detecting the magnetism of weakly-magnetic mineral

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw ore containing Cu0.63%, Co5.14% and Fe0.73% is crushed and ground. After grinding, the -0.074mm ore accounts for 85% of all the ore. It is made into a slurry with a concentration of 25% and mixed well. The magnetic separation test with the background field strength from 0.3T to 2.0T is carried out with a small pair of extremely high gradient magnetic separators, and open-circuit sweeping is carried out at multiple field strengths to obtain concentrates and final tailings at various field strengths. The results of Example 1 are shown in Table 1.

[0025] Table 1 Example 1 result

[0026]

[0027] Mineral magnetic detection conclusion:

[0028] (1) The recovery rate of copper-cobalt-iron beneficiation using magnetic separation alone is low, all less than 65%.

[0029] (2) From the recovery rate of each field strength, it can be seen that the recovery rate of the target minerals copper and cobalt is significantly lower when the field strength is higher than 1....

Embodiment 2

[0033] For raw ore containing Cu1.64%, Co11.35%, and Fe2.37%, the raw ore is crushed, ground to -0.074mm to account for 85%, and mixed into a 25% concentration pulp. The magnetic separation test with the background field strength from 0.3T to 2.0T is carried out with a small pair of extremely high gradient magnetic separators, and open-circuit sweeping is carried out at multiple field strengths to obtain concentrates and final tailings at various field strengths. The results of Example 2 are shown in Table 2.

[0034] The result of table 2 embodiment 2

[0035]

[0036] Mineral magnetic detection conclusion:

[0037] (1) The recovery rate of copper-cobalt-iron beneficiation using magnetic separation alone is low, and the copper recovery rate is only 53%.

[0038] (2) From the recovery rate of each field strength, it can be seen that the recovery rate of copper and cobalt is significantly lower when the field strength is higher than 1.2T, so 1.2T can be used as the backgro...

Embodiment 3

[0042] For the raw ore containing Cu7.67%, Co5.93%, Fe6.19%, the raw ore is crushed, and the ore is ground to -0.074mm to account for 60%, 75%, and 90%, respectively, and the pulp with a concentration of 25% is prepared and mixed . The magnetic separation test with the background field strength from 0.1T to 2.0T is carried out with a small pair of extremely high gradient magnetic separators, and open-circuit sweeping is carried out at multiple field strengths to obtain concentrates and final tailings at various field strengths. The result of embodiment 3 is shown in table 3, table 4, table 5.

[0043] Table 3- 0.074mm accounted for 60% results

[0044]

[0045] Table 4-0.074mm accounts for 75% of the results

[0046]

[0047] Table 5-0.074mm accounts for 90% of the results

[0048]

[0049] Mineral magnetic detection conclusion:

[0050] (1) -0.074mm accounts for 60% and the recovery rate of copper, cobalt and iron for magnetic separation alone is relatively high,...

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Abstract

The invention discloses a method for detecting the magnetism of a weakly-magnetic mineral, wherein the method may achieve an optimum magnetic separation effect by selecting field intensity corresponding to certain ore when the certain ore is required to be subjected to magnetic separation. The method comprises flows of: (1) a sample ore preparing step of fragmenting, grinding, and screening raw ore ; (2) a slurry forming step of pouring the grinded ore into water and stirring the grinded ore in order to form ore mortar, wherein the content of the ore in the ore mortar maintains between 10 and 40 percent; (3) a magnetic separation step of uniformly mixing the ore mortar and adjusting and increasing background field intensity increased from 0.05T to a maximum value in such a manner that 0.2 or 0.3T is increased every time; and an analysis step of analyzing magnetic ore concentrate and final tailings in each field intensity in order to obtain magnetic substance mineral constituents. Accordingly, the method has characteristics of simple operation, convenient field intensity selection, and good magnetic separation effect.

Description

technical field [0001] The invention relates to the field of mineral production, in particular to a method for detecting the magnetism of weakly magnetic minerals. Background technique [0002] Flotation utilizes mineral buoyancy for sorting, and magnetic separation utilizes minerals for magnetic separation. The method of combining flotation and magnetic separation gives full play to the respective advantages of flotation and magnetic separation, and significantly improves the recovery rate of valuable metals and the grade of concentrate. . [0003] Strong magnetic minerals (iron ore) mainly adopt magnetic separation process, and weak magnetic minerals mainly adopt flotation process. With the development of high gradient magnetic separation technology, the magnetic separation of weak magnetic separation minerals has been paid more attention. From the analysis of mineral magnetism, most minerals contain weak magnetism, and the specific magnetic susceptibility coefficient of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12
Inventor 李国民陈斌耀杨铖巴红飞刘邦白龙刚
Owner 취저우화여우코발트뉴머터리얼컴퍼니리미티드
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