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Comprehensive recycling and treating method for gold concentrate roasting enterprise mine acid waste water

A technology for mine acid wastewater and gold concentrate, applied in metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as poor effective recovery of valuable elements, reduce stockpiles and lower operating costs , the effect of simple process

Inactive Publication Date: 2019-07-12
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for comprehensive recovery and treatment of mine acidic wastewater in gold concentrate roasting enterprises to solve the problems of poor comprehensive treatment of mine acidic wastewater and effective recovery of valuable elements in gold concentrate smelting enterprises

Method used

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  • Comprehensive recycling and treating method for gold concentrate roasting enterprise mine acid waste water
  • Comprehensive recycling and treating method for gold concentrate roasting enterprise mine acid waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Include the following steps:

[0029] (1) pump the mine acid waste water of the gold concentrate roasting enterprise into the buffer tank-1, and the residence time is 2.5h; the pH value of the mine acid waste water is 1, and the heavy metal ions in the mine acid waste water are mainly Fe, Zn, Cu as Main, where the concentration of Fe is 3000mg / L, the concentration of Zn is 3000mg / L, and the concentration of Cu is 50mg / L;

[0030] (2) Mine acid waste water enters reactor one 2, reactor two 3, buffer tank two 4 by gravity successively from buffer tank one 1; Described reactor one, reactor two are stirring tanks, and the residence time is 1h, Buffer tank two adopts stirring tank, and the residence time is 2.5h. In reactor one and reactor two, hydrogen peroxide and lime are added. In each reactor, the hydrogen peroxide addition is 2mL / L, and the lime addition is 7g / L. The pH value in both reactor one and reactor two is 3.5;

[0031] (3) The acidic wastewater from the mine...

Embodiment 2

[0040] Include the following steps:

[0041] (1) Gold concentrate roasting enterprise mine acid waste water is pumped into buffer tank-1, and residence time is 2.5h; The pH value of described mine acid waste water is 1.3, and the heavy metal ion in the mine acid waste water is mainly Fe, Zn, Cu as Main, where the concentration of Fe is 4000mg / L, the concentration of Zn is 4000mg / L, and the concentration of Cu is 100mg / L;

[0042] (2) Mine acid waste water enters reactor one 2, reactor two 3, buffer tank two 4 by gravity successively from buffer tank one 1; Described reactor one, reactor two are stirring tanks, and the residence time is 1h, Buffer tank 2 is a stirring tank with a residence time of 2.5h. Add hydrogen peroxide and lime to reactor 1 and reactor 2. The amount of hydrogen peroxide added to each reactor is 2.5mL / L and the amount of lime added is 7.5g / L , adjust the pH value in reactor one and reactor two to be 3.7;

[0043] (3) The acidic wastewater from the mine i...

Embodiment 3

[0052] Include the following steps:

[0053] (1) Gold concentrate roasting enterprise mine acid waste water is pumped into buffer tank-1, and the residence time is 2.5h; The pH value of described mine acid waste water is 1.5, and the heavy metal ion in the mine acid waste water is mainly Fe, Zn, Cu as Main, where the concentration of Fe is 5000mg / L, the concentration of Zn is 5000mg / L, and the concentration of Cu is 150mg / L;

[0054] (2) Mine acid waste water enters reactor one 2, reactor two 3, buffer tank two 4 by gravity successively from buffer tank one 1; Described reactor one, reactor two are stirring tanks, and the residence time is 1h, Buffer tank two adopts stirring tank, and the residence time is 2.5h. In reactor one and reactor two, hydrogen peroxide and lime are added. In each reactor, the addition of hydrogen peroxide is mL / L, and the addition of lime is 8g / L. The pH value in both reactor one and reactor two is 4;

[0055] (3) The acidic wastewater from the mine...

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Abstract

The invention relates to a comprehensive recycling and treating method for gold concentrate roasting enterprise mine acid waste water, and belongs to a gold industry water treatment method. The gold concentrate roasting enterprise mine acid waste water is pumped into a first buffering tank and sequentially flows into a first reactor, a second reactor and a second buffering tank to be subjected tofilter pressing; the gold concentrate roasting enterprise mine acid waste water obtained after filter pressing enters a third buffering tank and sequentially flows into a third reactor, a fourth reactor and a fourth buffering tank, sodium sulfide is added in the third reactor and the fourth reactor, and filter pressing is conducted; and after filter pressing, the gold concentrate roasting enterprise mine acid waste water enters a fifth buffering tank and sequentially flows into a first neutralizing tank, a second neutralizing tank and a sixth neutralizing tank, filter pressing is conducted, filter pressing slag is stacked and stored, and filter pressing liquid is discharged. The technology process is simple, the valuable element recycling efficiency is high, the product purity is high, thecomprehensive treatment effect is stable, environment friendliness is achieved, the running expense is low, and extremely high popularization value is achieved.

Description

technical field [0001] The invention relates to a water treatment method in the gold industry in the field of environmental protection, in particular to a method for comprehensive recovery and treatment of acidic wastewater in mines of gold concentrate roasting enterprises. Background technique [0002] In the gold industry, the mine acid wastewater (AMD) of gold concentrate smelting enterprises has a high content of valuable elements. It is a great waste of resources to directly store the press filter residue after neutralizing the mine acid wastewater and pressure filtration in the tailings pond. At present, the composition of mine acidic wastewater in gold roasting and smelting enterprises is complex, and the treatment technologies are diverse, mainly including chemical methods, physical methods, biological methods, etc. Among them, methods such as ion exchange, adsorption, and membrane separation in physical methods have relatively good treatment effects on mine acidic wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/20C02F9/04C02F103/16
CPCC02F1/001C02F1/5236C02F1/722C02F9/00C02F2103/16C02F2301/08C22B7/006C22B19/26
Inventor 刘影迟崇哲邱陆明张宇
Owner CHANGCHUN GOLD RES INST
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