Method for selecting gold from gold ore leaching residue

A leaching slag and gold beneficiation technology, which is applied in chemical instruments and methods, flotation, wet separation, etc., can solve problems affecting the quality of flotation gold concentrate, and achieve low beneficiation cost, easy management and operation, and excellent technological process results simple effect

Active Publication Date: 2014-08-13
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for selecting gold from gold ore leaching slag, to solve the problem that the traditional flotation process adopts direct flotation to recover gold minerals, which seriously affects the quality of flotation gold concentrate

Method used

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  • Method for selecting gold from gold ore leaching residue
  • Method for selecting gold from gold ore leaching residue
  • Method for selecting gold from gold ore leaching residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Grinding: Grinding the raw ore slag, grinding the raw ore until the ore particles smaller than 0.074mm account for 75%, adding 1000 g / t of activated carbon during grinding, adding water to adjust the slurry to a concentration of 36%;

[0019] (2) Grid sieve: A 40-mesh grid sieve is used at the ore discharge port of the ball mill to first filter out the gold-loaded carbon with higher gold content on the screen, and then enter the pulp under the screen into the flotation operation;

[0020] (3) Rough separation: add gangue inhibitor, collector, and foaming agent in turn to the slurry, adjust the slurry and stir, and carry out rough separation and flotation operations to obtain rough separation concentrate and rough separation tailings; the addition amount is based on each In terms of tons of raw ore, the inhibitor sodium fluorosilicate is 700 g / t, the collector butyl ammonium black medicine is 10 g / t, and the foaming agent terpineol oil is 10 g / t;

[0021] (4) Sweepin...

Embodiment 2

[0027] (1) Grinding: Grinding the raw ore slag, grinding the raw ore until the ore particles smaller than 0.074mm account for 70%, adding 1200 g / t of activated carbon during grinding, adding water to adjust the slurry to a concentration of 30%;

[0028] (2) Grid sieve: A 40-mesh grid sieve is used at the ore discharge port of the ball mill to first filter out the gold-loaded carbon with higher gold content on the screen, and then enter the pulp under the screen into the flotation operation;

[0029] (3) Rough separation: add gangue inhibitor, collector, and foaming agent in turn to the slurry, adjust the slurry and stir, and carry out rough separation and flotation operations to obtain rough separation concentrate and rough separation tailings; the addition amount is based on each In terms of tons of raw ore, the inhibitor sodium fluorosilicate is 500 g / t, the collector butyl ammonium black medicine is 15 g / t, and the foaming agent terpineol oil is 5 g / t;

[0030] (4) Sweeping...

Embodiment 3

[0036] (1) Grinding: Grinding the raw ore slag, grinding the raw ore until the ore particles smaller than 0.074mm account for 80%, adding 900 g / t of activated carbon during the grinding, adding water to adjust the slurry to a concentration of 40%;

[0037] (2) Grid sieve: A 40-mesh grid sieve is used at the ore discharge port of the ball mill to first filter out the gold-loaded carbon with higher gold content on the screen, and then enter the pulp under the screen into the flotation operation;

[0038] (3) Rough separation: add gangue inhibitor, collector, and foaming agent in turn to the slurry, adjust the slurry and stir, and carry out rough separation and flotation operations to obtain rough separation concentrate and rough separation tailings; the addition amount is based on each In terms of tons of raw ore, the inhibitor sodium fluorosilicate is 900 g / t, the collector butyl ammonium black medicine is 15 g / t, and the foaming agent terpineol oil is 10 g / t;

[0039] (4) Swee...

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Abstract

The method discloses a method for selecting gold from gold ore leaching residue. The method comprises the following steps: ore grinding, grid screening, roughing, scavenging, first selection, second selection and third selection. Active carbon is added during ore grinding, gold loaded carbon with higher gold content is firstly screened by adopting a 40-mesh grid screen at a ball-milling ore discharge port, then an inhibitor, a collecting agent and a foaming agent are added during the floatation process, and finally size mixing and stirring are carried out for roughing floatation work. The inhibitor is sodium fluosilicate, the collecting agent is Ammonium dibutyl dithiophosphate, and the foaming agent is terpenic oil. According to the method, through reasonable allocation of ore grinding and grid screening, the gold grade of the gold loaded carbon reaches to 70-80 g/T, the gold grade of floatation gold concentrate reaches to 15-20 g/T, the recovery rate of the gold loaded carbon reaches to 5-6%, the recovery rate of floatation gold reaches to 50-55%, and the total recovery rate of gold reaches to 55-61%. The ore dressing method is simple in technology and easy to operate on site.

Description

technical field [0001] The present invention relates to a mineral processing method, in particular to a method for separating gold from gold ore leaching slag. Background technique [0002] Generally, gold ore leaching slag is recovered by direct flotation. On the one hand, direct flotation recovery causes a small amount of gold-loaded carbon loss. In addition, due to the presence of gold-loaded carbon, the amount of flotation collectors increases sharply, which reduces the selectivity of flotation agents, worsens the flotation environment, and increases the amount of agents. And seriously affected the quality of flotation gold concentrate. Contents of the invention [0003] The purpose of the present invention is to provide a method for selecting gold from gold ore leaching slag, to solve the problem that the traditional flotation process uses direct flotation to recover gold minerals, which seriously affects the quality of flotation gold concentrate. [0004] A method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/02
Inventor 李福兰胡保栓柏亚林赵海铭孙运礼吉鸿安王李鹏廖雪珍袁艳刘斯佳
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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