Treatment agent and process for metallurgical composite wastewater containing waste acid, metal and heavy metal

A technology for treating chemicals and heavy metals. It is applied in the fields of metallurgical wastewater treatment, neutralization water/sewage treatment, and water treatment parameter control. It can solve the problems of equipment corrosion, large amount of wastewater, and high cost of biological treatment. The effect of safe production process and compact treatment process

Pending Publication Date: 2022-05-06
湖南天童环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Neutralize with lime, all the components will precipitate, the amount of slag is large, the components are complex, and cannot be used, so they can only be temporarily stockpiled or buried; the membrane separation method and biological method have high processing costs and low processing capacity; the waste acid recovery method, due to the The amount of acid is only 1-5%, and the amount of wastewater is large, the treatment capacity is far behind, and it leads to serious corrosion of equipment, high treatment costs, and it is difficult for enterprises to operate for a long time

Method used

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  • Treatment agent and process for metallurgical composite wastewater containing waste acid, metal and heavy metal

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: Copper-containing strongly acidic wastewater from a certain gold-copper mine

[0029] A kind of copper-containing strong acid wastewater produced by copper leaching in a large-scale gold-copper mine according to the present invention. The characteristics of low-concentration copper-containing acid water are strong acid wastewater, in which the concentration of iron ions is 10.31 g / L, and the concentration of aluminum ions is 1.31 g / L. g / L, the concentration of zinc ions is 0.29g / L, the concentration of copper ions is 0.05-0.12g / L (higher in the rainy season), the average concentration is 0.08g / L, and the daily wastewater production is 24,000 tons.

[0030] Take 1 liter of waste water to be treated, first add 6 grams of agent A such as calcium carbonate to the waste acid water, adjust the pH to 4.0, neutralize the waste acid, produce calcium sulfate, iron hydroxide, aluminum hydroxide and other precipitation B, and generate gas Carbon dioxide is recycled to...

Embodiment 2

[0035] Example 2: Copper-containing strongly acidic wastewater from a dammed lake

[0036] After acid leaching copper was mined in a copper mine, dozens of acidic wastewater dammed lakes were formed in the mining area, accumulating more than 10 million tons of acidic wastewater, which became a "persistent" problem of environmental protection. For one of the barrier lakes, about 5.2 million tons of copper-containing strong acid wastewater is stored. The low-concentration copper-containing acid water is characterized by strong acid wastewater, which contains 18g / L of sulfate ions, 3.43 g / L of iron ions, and 3.43 g / L of magnesium ions. 1.25g / L, aluminum ion concentration 0.73g / L, zinc ion concentration 0.67g / L, copper ion concentration 0.43g / L, manganese ion concentration 0.14g / L, pH value 2.2.

[0037] Take 1 liter of waste water in the lake, add medicament A such as calcium carbonate 5.5 grams to the waste acid water, neutralize the waste acid, produce precipitation such as cal...

Embodiment 3

[0038] Example 3: Copper-containing strongly acidic wastewater from a dammed lake

[0039]Under the background described in Example 2, for another acid water dammed lake formed by the confluence of mining wastewater, mining groundwater and surface water, about 3.2 million tons of acid wastewater is stored in it, and the characteristic of low-concentration copper-containing acid water is strong acidity Wastewater, which contains iron ion concentration 4.62g / L, aluminum ion concentration 0.38g / L, zinc ion concentration 0.57g / L, sulfate ion concentration 16g / L, magnesium ion concentration 0.43g / L, manganese ion concentration 0.10g / L , pH value is 2.4.

[0040] Take 1 liter of waste water in the lake, add medicament A such as calcium carbonate 5 grams to the waste acid water, neutralize the waste acid, produce precipitation such as calcium sulfate, produce gaseous carbon dioxide and recycle it, and generate carbon dioxide products. Calcium sulfate, iron hydroxide, magnesium hydro...

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Abstract

The invention discloses an agent and a process for treating high-content waste acid of a metallurgical mine and by-producing multiple products, which are completed by the following agents and processes: firstly, adding an agent A into waste acid water to neutralize the waste acid, generate precipitates such as calcium sulfate and the like, and release gas carbon dioxide to be recovered and refined to generate a carbon dioxide product; precipitating and separating out calcium sulfate and aluminum ferric sulfate products. And continuously adding chemicals into the filtrate to generate copper, zinc and manganese precipitates, separating to obtain copper, zinc and manganese products, removing heavy metals, and finally discharging or recycling water after reaching the standard, so that all valuable components in the wastewater can be recycled into products, and the comprehensive utilization of resources is realized.

Description

technical field [0001] The invention relates to a waste water treatment medicament and a process, in particular to a medicament and a method for resource utilization of hydrometallurgical mine acidic waste water, and belongs to the field of environmental protection. Background technique [0002] Copper, zinc, iron, manganese, molybdenum, cobalt, nickel, vanadium, rare earth and other metal hydrometallurgical processes produce acidic wastewater, which contain a large amount of sulfate, fluorine, chloride and copper, iron, zinc, aluminum, manganese, lead , cadmium, arsenic, chromium, nickel, mercury, thallium and other metals and heavy metal ions. The pH value is lower than 1.3, the iron ion content is higher than 10g / L, the aluminum ion concentration is 1.3g / L, the sulfate radical concentration reaches 20-50g / L, and the copper and zinc ion content is 0.05-0.5g / L. Some also contain metal ions such as manganese, nickel, vanadium, and rare earth, with complex components and a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F101/22C02F103/16
CPCC02F9/00C02F2103/16C02F2101/20C02F1/66C02F2209/06C02F2001/007C02F1/001C02F2101/203C02F2101/206C02F2101/22
Inventor 肖国光韩琳刘慧珍谢芳立伍威马珊彭云昊徐中海
Owner 湖南天童环保有限公司
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