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Waste liquid treatment process

A waste liquid treatment and process technology, applied in filtration treatment, multi-stage water treatment, water/sewage treatment and other directions, can solve the problems of long process, incomplete removal of heavy metal ions, and inability to realize resource utilization, etc. Effect

Active Publication Date: 2021-10-26
GUANGXI SENHE HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the amount of waste liquid after screening the ore with non-cyanide leaching agents is large, and the removal of heavy metal ions is not complete, and repeated treatment is required, resulting in a long process and a long time-consuming process. When removing heavy metal ions, multiple heavy metal ions are simultaneously Removal, each metal ion cannot be recovered individually, and resource utilization cannot be realized

Method used

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  • Waste liquid treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Take the leaching waste liquid, detect copper ion 50mg / L, lead ion 23mg / L, zinc ion 2mg / L, arsenic ion 45mg / L (trivalent arsenic ion concentration is 16mg / L), antimony ion 2.5mg / L (three Valence antimony ion 1.0mg / L) and ferrous ion concentration 5g / L, the pH of waste liquid is 0.1.

[0076] Take 500g sample, add 8g mass percent of 50% hydrogen peroxide (the molar ratio of oxidizing agent to the total amount of low-valent ions is 1.3:1.0), stir and oxidize for 1.0 hour. Then add P204 iron ion extractant 25ml, carry out the extraction of iron ion, carry out liquid separation after standing for 2.0 hours, the raffinate after liquid separation evaporates under reduced pressure and reclaims acid. Then adjust the pH of the waste liquid to 2.0-3.0, then add sodium sulfide 0.1g (the addition of impurity remover is 1.2 times of the total ion chemical quantity of impurities in the waste liquid), after the reaction finishes, the solution pH is 3.3 , then filter, then add 0.24 g ...

Embodiment 2

[0079] Take the leaching waste liquid, detect copper ion 150mg / L, lead ion 63mg / L, zinc ion 24mg / L, arsenic ion 58mg / L (wherein trivalent arsenic ion 12mg / L), antimony ion 12.5mg / L (trivalent Antimony ion 5.3mg / L) and ferrous ion concentration 7.6g / L, the pH of waste liquid is 0.15.

[0080] Get 500g sample, add 12g mass percent to be 50% hydrogen peroxide (the mol ratio of hydrogen peroxide and the total amount of low-valent ions is 1.3:1) in waste liquid, stir and oxidize for 1.0 hour; Then add P204 iron ion extraction agent 25ml, carry out iron For the extraction of ions, liquid separation was carried out after standing for 3.0 hours, and the raffinate after liquid separation was evaporated under reduced pressure to recover the acid. Then, 0.2 g of iron powder was added to the liquid phase after liquid separation, and filtered. Then adjust the pH of the waste liquid to 2.5-3.0, then add sodium sulfide 0.1g, (the addition of impurity remover is 1.2 times of the total ion ch...

Embodiment 3

[0083] Take the leaching waste liquid, detect copper ion 95mg / L, lead ion 42mg / L, zinc ion 18mg / L, arsenic ion 84mg / L (wherein trivalent arsenic ion 20mg / L), antimony ion 5.5mg / L (trivalent arsenic ion Antimony ion 2.3mg / L) and ferrous ion concentration 8.2g / L, the pH of waste liquid is 0.20.

[0084] Get 500g sample, add 2.5g potassium permanganate (the mol ratio of oxidizing agent and low valence state ion total amount is 1.02:1) in the waste liquid, stir and oxidize 1.0 hour; Then add P204 iron ion extraction agent 25ml, carry out the extraction of iron ion Extraction, after standing still for 3.0 hours, liquid separation is carried out, and the raffinate after liquid separation is evaporated under reduced pressure to recover the acid. Then, 0.13 g of iron powder was added to the liquid phase after liquid separation, and filtered. Then adjust the pH of the waste liquid to 2.5-3.0, then add sodium sulfide 0.05g, (the addition of impurity remover is 1.2 times of the total io...

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Abstract

The invention relates to the technical field of non-cyanide mineral processing waste liquid treatment, in particular to a waste liquid treatment process. The waste liquid treatment process is used to treat strongly acidic waste liquid, comprising the following steps: adding an oxidant to the waste liquid to change the low-valence ions in the waste liquid into high-valence ions; then, removing the iron ions; Next, adding impurity remover to the waste liquid to remove Pb ions, Zn ions and Sb ions; then, adding scorodite forming agent to the waste liquid so that pentavalent arsenic ions form scorodite. It can effectively treat the strongly acidic waste liquid, effectively remove the arsenic in the waste liquid, and can recycle metal ions such as lead ions, iron ions and antimony ions.

Description

technical field [0001] The invention relates to the technical field of non-cyanide mineral processing waste liquid treatment, in particular to a waste liquid treatment process. Background technique [0002] The current gold extraction process and method has always been the main method due to its high cyanide leaching efficiency, relatively simple process, convenient operation, and relatively low cost. And around cyanidation leaching to improve the leachability of ore, and developed a variety of pretreatment - cyanide leaching joint gold extraction process. Greatly improved the utilization rate of gold resources. However, because the extreme toxicity of cyanide brings huge safety risks to the environment and humans and animals, many countries or regions restrict the use of cyanide; at the same time, cyanide leaching is also affected by many factors. There are fewer and fewer easy-to-select ores, and more and more refractory or multiple refractory ores that are not suitable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/20C02F101/10
CPCC02F1/001C02F1/24C02F1/26C02F1/58C02F1/62C02F1/66C02F1/705C02F1/72C02F9/00C02F2101/103C02F2101/20C02F2101/203C02F2209/02C02F2209/06C02F2301/08
Inventor 刘新阙山东夏国春李少元
Owner GUANGXI SENHE HIGH TECH CO LTD