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Method for recycling copper smelting wastewater

A treatment method and copper smelting technology, which is applied in the field of industrial waste water reuse treatment, can solve the problems of easy pollution of the membrane separation method, high investment cost, high operating cost, etc., achieve good industrial application prospects, reduce infrastructure costs, save The effect of energy consumption

Active Publication Date: 2012-10-24
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the membrane used in the membrane separation method is easily polluted, the operating cost is high, and the investment cost is also high, so the application of this technology in industry is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Treatment object: Comprehensive wastewater discharged from the copper smelter of Daye Nonferrous Metals Company.

[0016] Influent water quality: pH: 6.5; SS: 200mg / L; Cu: 12.6mg / L; As: 8.25mg / L;

[0017] Pb: 2.23mg / L; Cd: 1.85mg / L; hardness (calcium carbonate): 1100.5mg / L;

[0018] Total dissolved solids (TDS): 1614.3 mg / L.

[0019] Main process parameters:

[0020] First add lime milk to adjust the wastewater pH to 8.0;

[0021] Coagulant polyaluminum chloride (PAC) dosage: 25mg / L;

[0022] Coagulant polyacrylamide (PAM, cationic) dosage: 5mg / L;

[0023] Coagulation reaction time: 30min;

[0024] Settling time: 70min;

[0025] The supernatant after solid-liquid separation can be further treated with ion exchange resin combination: 001×7 strong acid styrene cation exchange resin + D202 macroporous strong basic styrene anion exchange resin;

[0026] The filtration rate of cation exchange resin: 12m / h;

[0027] Filtration rate of anion exchange resin: 7.8m / h.

[0028] Effluent water quali...

Embodiment 2

[0032] Treatment object: Comprehensive wastewater discharged from the copper smelter of Daye Nonferrous Metals Company.

[0033] Influent water quality: pH: 6.0; SS: 240mg / L; Cu: 22.5mg / L; As: 5.31mg / L;

[0034] Pb: 1.98mg / L; Cd: 1.63mg / L; Hardness (calculated as calcium carbonate): 880.3mg / L;

[0035] Total dissolved solids (TDS): 1236.2 mg / L.

[0036] Main process parameters:

[0037] First add lime milk to adjust the wastewater pH to 8.0;

[0038] Coagulant polyaluminum chloride dosage: 30mg / L;

[0039] Coagulant polyacrylamide (PAM, cationic) dosage: 6mg / L;

[0040] Coagulation reaction time: 25min;

[0041] Settling time: 80min;

[0042] The further treatment of the supernatant after solid-liquid separation can choose ion exchange resin combination:

[0043] D001 Macroporous Strongly Acidic Styrene Cation Exchange Resin + D301SC Macroporous Weakly Basic Styrene Anion Exchange Resin;

[0044] The filtration rate of cation exchange resin: 13m / h;

[0045] Filtration rate of anion exchange res...

Embodiment 3

[0050] Treatment object: Comprehensive wastewater discharged from the copper smelter of Daye Nonferrous Metals Company.

[0051] Influent water quality: pH: 6.2; SS: 280mg / L; Cu: 25.3mg / L; As: 5.25mg / L;

[0052] Pb: 2.83mg / L; Cd: 1.05mg / L; Hardness (calculated as calcium carbonate): 1521.5mg / L;

[0053] Total dissolved solids (TDS): 2017.2 mg / L.

[0054] Main process parameters:

[0055] First add lime milk to adjust the pH value of wastewater to 7.5;

[0056] Coagulant polyaluminum chloride dosage: 35mg / L;

[0057] Coagulant polyacrylamide (PAM, cationic) dosage: 8mg / L;

[0058] Coagulation reaction time: 20min;

[0059] Settling time: 90min;

[0060] The further treatment of the supernatant after solid-liquid separation can choose ion exchange resin combination:

[0061] D001 macroporous strong acid styrene cation exchange resin + 201×7 strong basic anion exchange resin;

[0062] The filtration rate of cation exchange resin: 14m / h;

[0063] Filtration rate of anion exchange resin: 6.8m / h.

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Abstract

The invention relates to the technical field of recycling of industrial wastewater, in particular to a method for recycling copper smelting wastewater. The method has a process principle that copper smelting wastewater is treated by utilizing the combination process of one-step coagulation sedimentation and ion exchange, and effluent quality meets the specifications of water quality standard (GB50050-1995) for circulating cooling water, urban sewage recycling and urban miscellaneous water quality (GB / T18920-2002) and urban sewage recycling landscape environment water quality (GB / T18921-2002).The method is carried out by starting from the source of wastewater treatment and used for preparing recycled water according with requirements through simple procedures and lower operation cost. Themethod has a low treatment cost and a reliable treatment effect and is easy to popularize. With the technology, the method for recycling copper smelting wastewater, with low cost, high performance and high added values, can be provided, and has wide market prospects and considerable social and economic benefits.

Description

Technical field [0001] The invention relates to the technical field of recycling treatment of industrial wastewater, in particular to a method for recycling treatment of copper smelting wastewater. Background technique [0002] During the copper smelting production process, a large amount of production wastewater is produced, which comes from various production processes: concentrate drying, smelting furnace, converter, anode furnace, power generation workshop, oxygen production station, sulfuric acid workshop, electrolysis workshop, slag cooling, etc. The main pollutants in wastewater are acid and alkali, suspended solids, heavy metal ions (such as Cu, Pb, Cd, As, etc.). [0003] In the copper smelter wastewater treatment process, in order to neutralize a large amount of acid wastewater, a large amount of lime milk and ferrous sulfate are added in the traditional lime iron salt method, which results in a higher Ca2+ content in the final effluent (about 600-1000mg / L), the total d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/16
Inventor 杜冬云张麟叶恒朋吴国珉曹龙文吕重安方照坤汤雁斌罗卫兵肖莹莹
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES