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
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[0046] Such as figure 1 As shown, according to the present invention, a process for treating acidic wastewater from a mine with high concentration of copper and iron includes the following sequential process steps and conditions:
[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 of the wastewater to 2.5-3.5, so that the ferric iron in the wastewater can generate Fe(OH) 3 Neutralizing slag
[0048] The second step: solid-liquid separation, solid-liquid separation of the neutralized clear liquid and neutralized slag after iron removal, and the separated neutralized slag is sent to the tailing pond;
[0049] The third step: biological vulcanization, the clear liquid after solid-liquid separation A is mixed with the reflux water after biological purification in the fifth step, the mixing ratio is 1:3-10, and the pH value after mixing is controlled in the range of 4.0-7.0 to make the clear Th...
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