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Method for processing wastewater in production of nickel cobalt lithium manganate

A nickel-cobalt lithium manganese oxide and wastewater production technology, which is applied in the field of energy saving and emission reduction, can solve the problems of large wastewater, and achieve the effects of zero discharge, high reuse rate, and large industrial value

Active Publication Date: 2010-01-13
山东天骄新能源有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a treatment method for the production wastewater of nickel-cobalt-lithium-manganese-oxide in view of the disadvantage that a large amount of waste water can be produced during the production process of the precursor of the existing nickel-cobalt-lithium-manganese-oxide positive electrode material, so that Wastewater can achieve a high reuse rate, no new impurity ions are introduced into the reused water, and zero discharge is achieved

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  • Method for processing wastewater in production of nickel cobalt lithium manganate

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specific Embodiment

[0028] Taking 10 tons of wastewater produced by producing 1 ton of nickel-cobalt lithium manganate precursor as an example, the quality of the wastewater is:

[0029] serial number

[0030] By adding NaOH to the above wastewater to pH > 12.5, the Ni 2+ The ion concentration is reduced to 1-5mg / L, Mn 2+ 、Co 2+ The ion concentration is reduced to 2+ , Mn 2+ 、Co 2+ The ion concentration is reduced to + , SO 4 2- ions, after the three-stage RO membrane, the recovery rate of pure water is as high as 80%, and concentrated water can be concentrated and crystallized to obtain 4 tons of Na 2 SO 4 10H 2 O or 1.75 tons of Na 2 SO 4 The by-products achieve an economic value of about 5,000 yuan, and the entire treatment process achieves zero emissions.

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Abstract

The invention relates to a method for processing wastewater in the production of nickel cobalt lithium manganate, comprising the following steps: stirring the wastewater containing metal ions of nickel, cobalt and manganese, ammonia ions and solid particles, adding alkaline solution to rise the pH value to be more than 12.5, and completely precipitating the nickel, cobalt and manganese metal ions in the wastewater; leading the wastewater to a sedimentation pond so as to sedimentate the solid particles in the wastewater; leading the wastewater to an ammonia evaporator to remove the ammonia ions in the wastewater; leading the wastewater to a sand bed to filter a small amount of sediments; leading the wastewater to a pH value regulating pond, pouring acid solution to the pond to reduce the pH value to be between 6 and 9; and leading the wastewater to a three-level RO film, and returning pure water filtered by the three-level RO film to production for recycling. The processing method of production wastewater of nickel cobalt lithium manganate is used for recycling wastewater without introducing new impurities, the reclamation rate is high, zero draining is realized, and side products have higher economic value.

Description

technical field [0001] The invention relates to the technical field of energy saving and emission reduction in the energy industry, and more specifically relates to a method for treating waste water produced by lithium ion cathode material nickel cobalt lithium manganese oxide. Background technique [0002] The energy issue is a key issue related to the sustainable development of the world, and seeking and developing alternative secondary energy is an important national policy of all countries in the world. Lithium-ion battery is a high-energy battery that has developed rapidly in the past ten years, and has become the first choice for secondary energy. Compared with other secondary batteries, lithium-ion batteries have the advantages of high voltage, high specific energy, long cycle period, wide operating temperature range, and less environmental pollution, and have broad application prospects. [0003] At present, lithium-ion batteries are mainly developed in the directio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/24C01D5/00C02F1/66C02F1/44C02F1/20C02F101/20C02F101/16
Inventor 王伟东吴平
Owner 山东天骄新能源有限公司
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