Arsenic-antimony-cyanogen-containing mine wastewater treatment method

A mine wastewater and treatment method technology, applied in the direction of mining wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problem that the water quality of the treated water is difficult to meet, and achieve the effect of realizing resource utilization

Active Publication Date: 2016-08-17
HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] With the continuous development of my country's national economy, many gold mines have entered the western region for gold mining. The western region is ecologically fragile and environmentally sensitive. With the gradual strengthening of the country's environmental protection requirements, the state and local governments have set regulations on the discharge of wastewater in these environmentally sensitive areas. More stringent discharge requirements, so the conventional chemical precipitation method is used to treat unde

Method used

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  • Arsenic-antimony-cyanogen-containing mine wastewater treatment method
  • Arsenic-antimony-cyanogen-containing mine wastewater treatment method

Examples

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Comparison scheme
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Example Embodiment

[0070] Example 1

[0071] After the downhole wastewater is produced, clarify it for 24 hours, then add ferrous sulfate to the downhole wastewater, stir for 10min, then pour air into the wastewater, aerate for 60min, add 3# flocculant and stir for 5min, let it stand for 60min and then sample for analysis. The treatment results are shown in Table 1. When the dosage of ferrous sulfate is 1.0~2.0mg / l and the dosage of flocculant is 1.0mg / l, the concentration of heavy metal ions such as arsenic and antimony in the treated water, CODcr, CN - Both have reached a low level, the water quality is relatively clear, and arsenic and antimony can stably meet the national comprehensive sewage discharge standards.

[0072] Table 1

[0073] project

Example Embodiment

[0074] Example 2

[0075] Add lime milk to the above-mentioned treated water in Example 1, adjust the wastewater PH to PH=10~11.5, add 3# flocculant after stirring for 30 minutes, take the supernatant after natural sedimentation for 60 minutes for testing, the treatment results are shown in Table 2. Pollution factors such as arsenic, antimony, lead, and fluorine have reached a relatively low level, and the water quality is relatively clear. The indicators of arsenic, antimony, lead, and fluorine can stably meet the national comprehensive sewage discharge standards and the "Surface Water Environmental Quality Standard" (GB3838-2002 ) Class II water quality standards.

[0076] Table 2

[0077] project

[0078] Note: Sb, Zn 2+ Is the raw water index value

Example Embodiment

[0079] Example 3

[0080] Add sulfuric acid to the treated water in Example 2, adjust the pH of the wastewater to 8.0~9.0, then add chlorine dioxide to the treated water, and sample and analyze after 60 minutes of oxidation. The treatment results are shown in Table 3, and the dosage of chlorine dioxide is 5- At 20mg / l, treat CN in water - , CODcr, etc. have reached a low level, the water quality is relatively clear, CN - , CODcr index can stably meet the national comprehensive sewage discharge standard and the "Surface Water Environmental Quality Standard" (GB3838-2002) Class II water quality standard.

[0081] table 3

[0082] project

[0083] Note: COD value is the index value of raw water.

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Abstract

The invention discloses an arsenic-antimony-cyanogen-containing mine wastewater treatment method. The method includes the steps of putting an arsenic and antimony removing agent and an oxidant in underground wastewater of a gold mine so that insoluble compounds produced through arsenic, antimony, lead, cadmium and other heavy metals in wastewater can be deposited and removed; continuing to add an oxidant so that insoluble compounds produced through the residual arsenic and antimony removing agent can be deposited, most of CN- can be removed and slag and water can be rapidly separated through the net capturing and adsorbing effect of flocculant (or 3# flocculant); putting a pH regulating agent and flocculant (or 3# flocculant) in forepart treatment water for coagulation to further remove heavy metals, fluorine and other pollution factors in wastewater and safely dispose water treatment sludge; conducting pH value regulation, oxidation, adsorption and other treatment on clear water so that the indexes of lead, cadmium, arsenic, antimony, COD and CN- in treated water can stably reach the limit stipulated by Integrated Wastewater Discharge Standard (GB 8978-1996 replacing GB 8978-88) and can reach the class-II water quality standard of environmental quality standards for surface water (GB3838-2002) and underground wastewater recycling can be achieved.

Description

technical field [0001] The invention relates to a mine wastewater treatment method, in particular to a gold mine mining wastewater treatment method. Background technique [0002] my country is a big gold producing country. The grade of gold in the ore is low. Generally, there are only a few grams to tens of grams of gold in a ton of ore. Gold is often associated with lead, antimony, and arsenic. In the process of gold mining, underground mining is usually required. Mining wastewater refers to the wastewater formed during the mining process. The underground mining wastewater mainly comes from the water and surface precipitation poured into or infiltrated into the mine from the aquifer, the wastewater produced by the mining process, and the surface precipitation. Underground wastewater usually contains suspended solids, lead , antimony, arsenic and other heavy metal ions. [0003] For a long time, gold extraction from ores often adopts cyanidation gold extraction process, such ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/10C02F101/20
CPCC02F1/001C02F1/52C02F1/56C02F1/58C02F1/66C02F1/722C02F1/727C02F1/74C02F1/76C02F1/763C02F1/78C02F9/00C02F2101/20C02F2103/10C02F2301/08
Inventor 彭新平欧阳坤万斯朱安玲徐溢
Owner HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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