Laboratory ore grinding method for unevenly inlaid gold ore

A laboratory and gold mine technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve problems such as uneven distribution, improve the grinding effect, prevent over-grinding or under-grinding, and achieve good floating. The effect of selecting particle size conditions

Active Publication Date: 2019-12-31
ZIJIN MINING GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The task of the present invention is to overcome the deficiencies of the existing technology, and provide a laboratory grinding method for embedding uneven gold ore, which can effectiv

Method used

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  • Laboratory ore grinding method for unevenly inlaid gold ore
  • Laboratory ore grinding method for unevenly inlaid gold ore
  • Laboratory ore grinding method for unevenly inlaid gold ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A gold mine contains 1.85g / t of gold, 1.06% of sulfur, 5.86% of iron, 16.66% of CaO, 6.48% of MgO, and 6.48% of Al 2 o 3 7.70%, containing SiO 2 38.56%. The gold distribution rate of +75μm particle size is 24%, the distribution rate of -75μm+53μm particle size gold is 12%, the distribution rate of -53μm+38μm particle size gold is 14%, and the distribution rate of -38μm particle size gold is 50%. A laboratory rod mill (Φ200mm×160mm) is used to grind the incoming gold ore feed (grain size -2mm accounts for 100%), and after grinding to -75μm accounts for 80%, the material is discharged to obtain pulp 1. Then use a 38 μm standard sieve to screen the pulp 1 and divide it into a particle size above +38 μm and a particle size below -38 μm. The particle size above +38 μm enters the rod mill (Φ200mm×160mm) again for grinding, and after grinding to +75 μm, accounting for 10% of the raw ore, the material is discharged to obtain the pulp 2. The particle size below -38 μm is mix...

Embodiment 2

[0034] A gold mine contains 4.68g / t of gold, 1.54% of sulfur, 8.06% of iron, 9.57% of CaO, 3.16% of MgO, and 3.16% of Al 2 o 3 15.52%, containing SiO 2 49.71%. The gold distribution rate of +75μm particle size is 25%, the distribution rate of -75μm+53μm particle size gold is 14%, the distribution rate of -53μm+38μm particle size gold is 15%, and the distribution rate of -38μm particle size gold is 46%. A laboratory ball mill (Φ240mm×90mm) is used to grind the incoming gold ore feed (grain size -2mm, accounting for 100%), and after grinding to -75μm, accounting for 80%, the material is discharged to obtain the pulp 1. Then use a 38 μm standard sieve to screen the pulp 1 and divide it into a particle size above +38 μm and a particle size below -38 μm. The particle size above +38 μm enters the ball mill (Φ240mm×90mm) again for grinding, and the material is discharged after grinding to +75 μm, accounting for 10% of the raw ore, to obtain pulp 2. The particle size below -38 μm ...

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Abstract

The invention relates to a laboratory ore grinding method for an unevenly inlaid gold ore. The unevenly inlaid gold ore is ground by adopting a laboratory mill. The laboratory ore grinding method comprises the steps that ore grinding is conducted, ground gold ore is added into a first laboratory mill for conventional ore grinding, and ground to be -75 [mu]m accounting for 80%, and then dischargingis conducted to obtain first ore pulp; screening is conducted, a standard screen of 38 [mu]m is added to screen the first ore slurry, and the first ore slurry is screened into size fractions of +38 [mu]m or above and size fractions of -38 [mu]m or below; regrinding is conducted, the size fractions of +38 [mu]m or above are added into a second laboratory mill for regrinding, and ground until the conventional standard screen of 75 [mu]m is used for screening out size fractions of +75 [mu]m accounting for 10% of raw ore, and then discharging is conducted to obtain second ore pulp; and mixing isconducted, the size fractions of -38 [mu]m or below are mixed with the second ore pulp to obtain third ore pulp, the comprehensive ore grinding fineness of the size fractions of +75 [mu]m of the thirdore slurry accounts for 10%, namely size fractions of -75 [mu]m account for 90%, and finally the third ore slurry enters floatation operation. The laboratory ore grinding method has the advantages ofeffectively dissociating target minerals, preventing the phenomena of over grinding or under grinding, creating good floatation particle size conditions for the subsequent floatation operation and the like, and is suitable for the application to the field of non-ferrous metal beneficiation.

Description

technical field [0001] The invention relates to a laboratory grinding method for embedding uneven gold ore, which is suitable for application in the field of non-ferrous metal beneficiation. Background technique [0002] At present, the grinding equipment commonly used in the laboratory is mainly ball mill and rod mill, the screening equipment is 75 μm standard sieve, and the grinding method is mainly open circuit grinding. Due to the open circuit grinding method for minerals with uneven particle size distribution, it is easy to cause uneven particle size distribution of the grinding product, and the target minerals have over-grinding or under-grinding phenomenon, so there is a waste of energy and high slime content during overgrinding. Consumption of energy and chemicals affects the grade and recovery rate of concentrate products; second, the target minerals are not fully dissociated during under-grinding and cannot be effectively recovered. [0003] In order to solve the ...

Claims

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Application Information

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IPC IPC(8): B03B1/00B03B7/00B03B9/00
CPCB03B1/00B03B7/00B03B9/00
Inventor 陈水波鲁军徐其红伍赠玲吴维新赵汝全
Owner ZIJIN MINING GROUP
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