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Technology for preprocessing wastewater generated in dysprosium oxide production

A production wastewater and pretreatment technology, applied in mining wastewater treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems that restrict the development of the rare earth industry, difficult to meet the wastewater discharge requirements, etc., and achieve strong adsorption of small particles and metals The effect of ion power, strength increase, and efficiency improvement

Inactive Publication Date: 2020-04-10
ANHUI JINSANLONG RENEWABLE RESOURCES
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Problems solved by technology

[0003] my country has strict requirements on the quality of wastewater discharged from the rare earth industry. Because the wastewater contains a lot of oily substances and heavy metal ions, it is difficult for various enterprises to meet the wastewater discharge requirements, which greatly restricts the development of the rare earth industry.

Method used

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  • Technology for preprocessing wastewater generated in dysprosium oxide production

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Embodiment 1

[0044] A kind of dysprosium oxide production wastewater pretreatment process, comprises the following steps:

[0045] S1. Introducing the production wastewater into the grease trap to remove most of the grease to obtain degreasing wastewater;

[0046] S2, introducing the degreasing wastewater into the sedimentation tank, adding a flocculant, and removing the sediment after settling to obtain the supernatant A;

[0047] In S2, the flocculant is polyacrylamide, aluminum sulfate, polyaluminum chloride or a mixture of two or more, the amount of flocculant is 0.25-1.0mg / L, and the settling time is 20-30min.

[0048] S3. Introduce the supernatant A into the stirring tank, add a heavy metal adsorbent, fully stir for 3-5 hours, let stand for 1-2 hours, and remove the precipitate to obtain the supernatant B;

[0049] In S3, the heavy metal adsorbent includes the following components by weight: 10-15 parts of solidified mixture, 4-8 parts of lignin, 3-6 parts of diatomaceous earth, and...

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Abstract

The invention discloses a technology for preprocessing wastewater generated in dysprosium oxide production, and belongs to the technical field of rare earth processing. The technology comprises following steps: introducing production wastewater into an oil separating tank to remove most of grease; after the grease is removed, adding a flocculating agent, after precipitation, removing the precipitates to obtain supernate (A), introducing the supernate (A) into a stirring tank, adding a heavy metal adsorbent, removing the precipitates to obtain supernate (B), filtering the supernate (B) to obtain filtrate, making the filtrate go through macroporous adsorption resin, collecting the effluent, making the effluent go through a reverse osmosis membrane to obtain a penetrating liquid, and carryingout photocatalytic reactions. The wastewater is preprocessed by a plurality of processing technologies, heavy metals, organic substances, and ammonia nitrogen in wastewater are fully processed; the processing effect is good, after processing, the wastewater can reach the discharge standards; the processed wastewater can be further processed, the subsequent water treatment efficiency is improved;and the preprocessed wastewater can be processed under different conditions.

Description

technical field [0001] The invention relates to the technical field of rare earth processing, in particular to a pretreatment process for dysprosium oxide production wastewater. Background technique [0002] my country is rich in rare earth resources and is a big country in rare earth mining and processing. After half a century of development, my country's rare earth industry has made great achievements. Its rare earth mineral output has been ranking first in the world in recent years, which has brought huge resource benefits to our country, but at the same time caused corresponding environmental problems. [0003] my country has strict requirements on the quality of the wastewater discharged from the rare earth industry. Because the wastewater contains a lot of oily substances and heavy metal ions, it is difficult for various enterprises to meet the wastewater discharge requirements, which greatly restricts the development of the rare earth industry. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16C02F101/20C02F101/30C02F103/10
CPCC02F1/001C02F1/285C02F1/286C02F1/40C02F1/42C02F1/441C02F1/5245C02F1/56C02F1/725C02F9/00C02F2101/16C02F2101/20C02F2101/30C02F2103/10C02F2209/08
Inventor 雷忠王福寿刘芬祝红芸
Owner ANHUI JINSANLONG RENEWABLE RESOURCES
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