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Comprehensive treatment method for tungsten smelting wastewater

A comprehensive wastewater treatment technology, applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as unsatisfactory effect, heavy odor, and unresolved wastewater treatment problems , to achieve the effects of reducing equipment and facility investment and operating cost consumption, shortening the treatment process, and improving wastewater treatment efficiency

Inactive Publication Date: 2015-09-30
JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the wastewater treatment problem of tungsten smelting has not been effectively solved
[0004] The traditional ammonia nitrogen, heavy metal, and COD treatment methods are single, and only one or at most two pollutants can be treated. A combination of multiple methods is required, and there are unsatisfactory effects, high treatment costs, and complicated treatment processes. Disadvantages such as cumbersome, large amount of slag, poor safety, heavy odor, etc.
[0005] Therefore, the market urgently needs to overcome the singleness and limitations of traditional methods, and provide a simple and convenient new method for comprehensive treatment of tungsten smelting wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: 300ml of waste water, containing 15 mg / l of ammonia nitrogen, 500 mg / l of COD, and 8 mg / l of As in the waste water, adding sulfuric acid to adjust pH=4. Weigh 2.5g of drug A, add it to the waste water, stir for 30min, let the drug A fully dissolve and react, let it stand for 30min, filter it with filter paper, take samples to test ammonia nitrogen, COD, As, the content after treatment is yes, ammonia nitrogen is 0.18mg / l, COD is 76mg / l, As is 0.06mg / l, and the removal rates of the three pollution factors are ammonia nitrogen removal rate of 98.8%, COD removal rate of 84.8%, As removal rate of 99.3%, available chlorine in bleaching powder The effective utilization rate is 78.7%.

Embodiment 2

[0035] Example 2: 300ml of waste water containing 500 mg / l of ammonia nitrogen, 100 mg / l of COD and 50 mg / l of As in the waste water, adding sulfuric acid to adjust pH=6. Weigh 4.5g of medicament A, add it to waste water, stir for 30min to fully dissolve the medicament A, let it stand for 30min, filter it with filter paper, take a sample to test ammonia nitrogen, COD, As, the content of ammonia nitrogen after treatment is 6.37mg / l. COD is 50mg / l, As is 0.36mg / l, and the removal rates of the three pollution factors are ammonia nitrogen removal rate of 98.7%, COD removal rate of 50%, As removal rate of 99.3%, and available chlorine in bleaching powder The effective utilization rate is 88%.

Embodiment 3

[0036] Example 3: 300 ml of waste water, containing 150 mg / l of ammonia nitrogen, 150 mg / l of COD, and 0.5 mg / l of As in the waste water, adding sulfuric acid to adjust the pH to 7. Weigh 1.8g of medicament A, add it to the waste water, stir for 30min, let the medicament A fully dissolve and react, let it stand for 30min, filter with filter paper, take a sample to test ammonia nitrogen, COD, As, and the content of ammonia nitrogen after treatment is 6.5mg / l , COD is 45mg / l, As is 0.016mg / l, and the removal rates of the three pollution factors are ammonia nitrogen removal rate of 95.7%, COD removal rate of 70%, As removal rate of 96.8%. was 86.1%.

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Abstract

The invention discloses a comprehensive treatment method for tungsten smelting wastewater. The comprehensive treatment method comprises the following steps: 1) adding sulphuric acid in the wastewater generated by a tungsten smelting ion exchange method to adjust the pH value; 2) adding a treatment agent in the wastewater obtained in the first step, uniformly stirring, adequately reacting, standing and precipitating, filtering, taking a filter clear liquid, and detecting the contents of ammonia nitrogen, CODs and heavy metals in the wastewater. The comprehensive treatment method disclosed by the invention is capable of effectively treating the ammonia nitrogen in the tungsten smelting wastewater, playing a great treatment role on the heavy metals in the wastewater, and treating the CODs in the wastewater by properly increasing the pouring amount of a reagent A to really achieve the effect of achieving a plurality of purposes by one reagent; compared with the traditional tungsten industry wastewater treatment method, the prior-period equipment and facility investment and running cost consumption are greatly reduced, the tungsten industry wastewater treatment process flow is shortened, the wastewater treatment efficiency is increased, and the production cost is saved.

Description

technical field [0001] The invention relates to a comprehensive treatment method for tungsten smelting wastewater, which belongs to the field of wastewater treatment. technical background [0002] In the prior art, the problem of wastewater treatment in tungsten smelting has not been effectively solved. [0003] In particular, in the process of producing ammonium paratungstate by ion exchange method, about 100 tons of waste water will be produced for every ton of ammonium paratungstate produced. The amount of waste water produced is large, and the components in the waste water are complex. , the concentration of ammonia nitrogen is low, and the content of COD and heavy metals varies greatly with tungsten concentrate. [0004] The traditional ammonia nitrogen, heavy metal, and COD treatment methods are single, and only one or at most two pollutants can be treated. A combination of multiple methods is required, and there are unsatisfactory effects, high treatment costs, and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/16
Inventor 何良东罗章青余旭
Owner JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP
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