Cobalt nickel metallurgy wastewater sludge recycling method

A treatment method and technology for waste water slag, applied in the field of waste resource utilization, can solve the problems of high cost and long process flow, and achieve the effect of low cost, short process flow and simple equipment

Active Publication Date: 2015-04-01
SHAOXING KEQIAO DRAINING
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Problems solved by technology

This process is long and expensive

Method used

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  • Cobalt nickel metallurgy wastewater sludge recycling method

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Embodiment Construction

[0048] The following table shows the composition of wastewater residue

[0049] Wastewater slag composition %

[0050] co Ni Cu mn Zn Ca Mg Fe Al Cr Na 1.0 3.5 1.8 9.5 4.8 6.9 4.2 0.4 0.3 0.1 20.1 Cd Pb 0.02 0.01

[0051] Slurry waste water according to the solid-liquid ratio of 1:3, add sulfuric acid to maintain the pH of the reaction at 1.5, and add sodium sulfite according to the cobalt-manganese molar ratio of 1:1, stir and react at 70°C for 1.5 hours, and then remove iron from the dissolved solution For metal ions such as aluminum and chromium, add sodium chlorate according to the iron molar ratio of 1:0.3 and sodium tetraphenylborate according to the iron molar ratio of 1:0.02, add liquid caustic soda to adjust the pH of the solution to about 4.0, stir for 1.5 hours and then filter to remove iron The composition of the back liquid is as follows.

[0052] L...

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Abstract

The invention provides a cobalt nickel metallurgy wastewater sludge recycling method, and belongs to the field of waste recycling. The method comprises the following steps: carrying out acid dissolution reduction on cobalt nickel metallurgy wastewater sludge to leach out valuable metals in the wastewater sludge, displacing copper by using manganese powder to recover copper, precipitating zinc by using manganese sulfide to recover zinc, using a fluoride to remove calcium and magnesium from the obtained zinc removed solution, carrying out advanced impurity removal and cobalt nickel manganese enrichment by using a P2O4 extractant, and carrying out advanced impurity removal on the obtained solution rich in cobalt, nickel and manganese by using manganese sulfide to obtain a solution for preparing an NCM ternary precursor. The method allows nickel, cobalt, manganese, zinc, copper and other metals to be completely recovered and the obtained cobalt, nickel and manganese solution to be used to prepare the NCM ternary precursor as a raw material, avoids cobalt, nickel and manganese separation, and also has the advantages of simple process, substantial improvement of the metal recovery rate, low cost, harmlessness to environment, and industrialization prospect.

Description

technical field [0001] The invention relates to the field of resource utilization of waste, in particular to a method for resource utilization of cobalt-nickel metallurgical wastewater slag. Background technique [0002] With the continuous mining of cobalt-nickel ore, the utilization of cobalt-nickel secondary resources has been paid more and more attention by people. The cobalt-nickel-containing wastewater produced in the cobalt-nickel hydrometallurgy and cobalt-nickel product preparation process, the cobalt produced after wastewater treatment Nickel wastewater slag, because it contains heavy metals such as cobalt, nickel, copper, zinc, manganese, etc., how to recycle it has become the focus of people's attention, and it is also an urgent problem to be solved. According to production practice experience, a cobalt 3000 tons / A hydrometallurgical plant with an annual output of 1,500 tons of nickel produces about 1,000 tons of cobalt and nickel waste water slag each year,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B15/00C22B19/30C22B23/00C22B47/00
CPCY02P10/20
Inventor 朱蕾
Owner SHAOXING KEQIAO DRAINING
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