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Method of producing iron concentrate from cyanidation gold-extracted waste slag

A technology of iron concentrate and waste residue, which is applied in the field of producing iron concentrate from cyanidation gold extraction waste residue, which can solve the problems of low utilization value, waste of resources, environmental pollution, etc., to improve economic benefits, reduce environmental pollution, and improve comprehensive utilization effects Effect

Inactive Publication Date: 2007-11-28
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Gold concentrate is divided into oxidized ore and sulfide ore. For sulfide ore, the tailings after extracting valuable elements such as gold and silver by direct cyanidation method, the sulfur content of which is mostly lower than 30%, according to the amount of sulfur content Generally, the method of stockpiling and roasting to make acid is used for treatment. For the gold extraction tailings with a sulfur content greater than 20%, the method of direct roasting is used to produce sulfuric acid. The iron content of the roasted slag is 25%-35%. The value is very low, and it is generally used as cement additives, etc.; for gold extraction tailings with a sulfur content of less than 20%, and useless sulfuric acid cinders, they can only be stored, which not only causes environmental pollution, but also wastes resources

Method used

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  • Method of producing iron concentrate from cyanidation gold-extracted waste slag
  • Method of producing iron concentrate from cyanidation gold-extracted waste slag
  • Method of producing iron concentrate from cyanidation gold-extracted waste slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Put the gold extraction tailings into the slurry mixing tank 1, add water to adjust the slurry concentration to 50%, stir continuously at normal temperature and pressure, and put it into the acidizing tank 2 after stirring evenly;

[0021] 2. Add industrial sulfuric acid to adjust the acidity of the pulp to PH=1.5, and stir continuously for 30 minutes to keep the acidity at PH=1.5. After the acidity is stable, put the pulp into the slurry mixing tank 3 continuously and evenly;

[0022] 3. Add water to adjust 30% of the pulp, and continuously feed and discharge, and the pulp enters the mixing tank 4;

[0023] 4. While stirring, continuously and evenly add flotation agent (butyl ammonium black drug) at 170 g / ton, and add 2# oil foaming agent at 80 g / ton, and continuously stir;

[0024] 5. After the ore pulp enters the flotation tank 5, closed-circuit flotation is carried out. After primary roughing, secondary closed-circuit sweeping, and fourth-stage closed-circuit sel...

Embodiment 2

[0031] 1. Put the gold extraction tailings into the slurry mixing tank 1, add water to adjust the pulp concentration to 60%, stir continuously at normal temperature and pressure, and put it into the acidizing tank 2 after stirring evenly;

[0032] 2. Add industrial sulfuric acid to adjust the acidity of the pulp to PH=2, and stir continuously for 35 minutes to keep the acidity at PH=2. After the acidity is stable, continuously and evenly put the pulp into the mixing tank 3;

[0033] 3. Add water to adjust the pulp to 33% and continuously feed and discharge the pulp, and the pulp enters the mixing tank 4;

[0034] 4. While stirring, continuously and evenly add flotation agent (butyl ammonium black drug) at 200 g / ton, and add 2# oil foaming agent at 70 g / ton, and continuously stir;

[0035] 5. After the ore pulp enters the flotation tank 5, closed-circuit flotation is carried out. After primary roughing, secondary closed-circuit sweeping, and fourth-stage closed-circuit selectio...

Embodiment 3

[0042] 1. Put the gold extraction tailings into the slurry mixing tank 1, add water to adjust the slurry concentration to 55%, stir continuously at normal temperature and pressure, and put it into the acidizing tank 2 after stirring evenly;

[0043] 2. Add industrial sulfuric acid to adjust the acidity of the pulp to PH=2.5, and continuously stir for 40 minutes to keep the acidity between PH=2.5. After the acidity is stable, continuously and evenly put the pulp into the slurry tank 3;

[0044] 3. Add water to adjust the pulp to 35%, and continuously feed and discharge, and the pulp enters the mixing tank 4;

[0045] 4. While stirring, continuously and evenly add flotation agent (butyl ammonium black drug) at 150 g / ton, and add 2# oil foaming agent at 60 g / ton, and continuously stir;

[0046] 5. After the ore pulp enters the flotation tank 5, closed-circuit flotation is carried out. After primary roughing, secondary closed-circuit sweeping, and fourth-stage closed-circuit selec...

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Abstract

The invention relates to a method of collecting iron concentrate from residue of gold extraction with cvanidation. This invention belongs to the field of metallurgy and chemical technology. It is characterized in that : 1. putting the residue of gold extraction into mix-slurry trough 1, adjusting the concentration of the ore slurry with water, mixing round and then putting it into acidification trough 2; 2. adjusting the acidity of ore slurry with industrial vitriol, mixing round continuously, putting it into mix-slurry trough 3; 3. adjusting the concentration of the ore slurry with water, charging and discharging continuously, putting the mixture into mix-slurry trough 4; 4. adding flotation agent and foaming agent, agitating; 5. carrying out closed circuit flotation process after the ore slurry going into the flotation trough, sulfur is concentrated by one step of rougher flotation, two steps of closed circuit scavenging and four steps of closed circuit picking; 6. lifting the sulfur concentration to filter press 9, dehydrating and separating, high grade sulfur is concentrated; 7. lifting the gangue to filter press 7, dehydrating and separating; 8. feeding the high grade sulfur concentrate to acid producing system 10, roasting, the residue is iron concentrate. The invention makes the content of iron in the residue of roasting to 60%-66%, reach the standard of puddling material.

Description

1. Technical field [0001] The invention relates to a method for producing iron ore concentrate from cyanidation gold extraction waste residue, and belongs to the technical field of gold smelting and comprehensive utilization of inorganic chemical resources. 2. Background technology [0002] Gold concentrate is divided into oxidized ore and sulfide ore. For sulfide ore, the tailings after extracting valuable elements such as gold and silver by direct cyanidation method, the sulfur content of which is mostly lower than 30%, according to the amount of sulfur content Generally, the method of stockpiling and roasting to make acid is used for treatment. For the gold extraction tailings with a sulfur content greater than 20%, the method of direct roasting is used to produce sulfuric acid. The iron content of the roasted slag is 25%-35%. The value is very low, and it is generally used as cement additives, etc.; for gold extraction tailings with a sulfur content of less than 20%, and...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/02C22B3/08B03B1/04B03B5/28
CPCY02P10/20
Inventor 尹瑞学韩玉石姚树建朱德兵
Owner SHANDONG GUODA GOLD
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