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Treatment process of copper-iron-contained high-concentration acidic mine wastewater

A mine acid wastewater treatment technology, applied in the field of copper and iron high concentration mine acid wastewater treatment, copper and iron high concentration mine acid wastewater treatment process, can solve the problem that is not suitable for high concentration acid wastewater treatment, metal ion tolerance Poor, low treatment efficiency and other issues, to achieve the effect of comprehensive process recycling with good benefits, low price and low treatment cost

Active Publication Date: 2010-01-20
ZIJIN MINING GROUP
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Problems solved by technology

The microbial treatment of acidic mine wastewater by using sulfate-reducing bacteria has the advantages of low cost, strong applicability, no secondary pollution, and recyclable valuable components. The range is small, the tolerance to metal ions is poor, the treatment efficiency is low, and it is not suitable for the treatment of high-concentration acidic wastewater, so it has not been widely used.

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  • Treatment process of copper-iron-contained high-concentration acidic mine wastewater
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  • Treatment process of copper-iron-contained high-concentration acidic mine wastewater

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Embodiment Construction

[0046] Such as figure 1 Shown, according to a kind of copper-iron-containing high-concentration mine acid wastewater treatment process that the present invention proposes, comprise following sequence process step and condition:

[0047] The first step: neutralize and remove iron, add lime or limestone to the acid wastewater of copper-containing iron mines to adjust the pH value of the wastewater to 2.5-3.5, so that the ferric iron in the wastewater can generate Fe(OH) 3 Neutralize slag;

[0048] The second step: solid-liquid separation, the clear liquid after neutralization and iron removal and the neutralization slag are subjected to solid-liquid separation, and the separated neutralization slag is sent to the tailings pond;

[0049] The third step: biological vulcanization, the clear liquid after solid-liquid separation A is mixed with the reflux water after the fifth step biological purification, the mixing ratio is 1:3-10, and the pH value after mixing is controlled in th...

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Abstract

The invention relates to a treatment process of copper-iron-contained high-concentration acidic mine wastewater. The treatment process comprises the following sequential process steps: (1) neutralization to remove iron; (2) solid-liquid separation; (3) biological sulfuration; (4) solid-liquid separation; and (5) biological purification for recovering valuable constituents in the wastewater and enabling yielding water to achieve an emission standard. The invention has the advantages of high removal rate of copper, iron and sulfate radicals, strong suitability, low treatment cost, environmental protection, good comprehensive recovery utilization effect, and the like and is particularly suitable for treating the copper-iron-contained high-concentration acidic mine wastewater generated in the copper-extracting production process by a biological wet method and in the mining process of copper sulphide.

Description

1. Technical field [0001] The invention relates to a wastewater treatment process, in particular to a process for the treatment of acidic wastewater from mines with high concentration of copper and iron, which is suitable for the treatment of acidic wastewater from mines with high concentrations of copper and iron produced in copper sulfide mining and biological wet copper extraction production processes . 2. Background technology [0002] In the process of copper sulfide mining and biological wet copper extraction, the main characteristics of the mine acid wastewater are low pH value, many types of metal ions, high concentration of copper, iron and sulfate, and its pH value is about 2.0. The iron ion content is higher than 7g / L, the sulfate radical concentration reaches 20g / L, and the copper ion content is 300-500mg / L. If the acid mine wastewater is discharged into the nearby farmland, the crops will turn yellow and the soil will be salinized; if it is discharged into the ...

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Application Information

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IPC IPC(8): C02F9/14C02F1/66C02F3/34C02F1/72C02F101/20
Inventor 庄明龙华金铭邹来昌阮仁满彭钦华甘永刚刘涛
Owner ZIJIN MINING GROUP
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