Method for treating cobalt-nickel-copper hydrometallurgy wastewater residue

A technology of hydrometallurgy and waste water slag, which is applied in the field of metallurgy, can solve the problems of difficult separation of valuable metals, the influence of leaching and extraction, and low metal recovery rate, and achieve good economic benefits, good social benefits, and high metal recovery rates. Effect

Active Publication Date: 2013-02-13
GEM CO LTD
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Problems solved by technology

If the conventional acid leaching method is adopted, the treatment capacity is low, the acid consumption is too large, the removal of impurities and the separation of various valuable

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  • Method for treating cobalt-nickel-copper hydrometallurgy wastewater residue

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[0025] Example one

[0026] A method for treating cobalt-nickel-copper hydrometallurgical wastewater slag includes the following steps:

[0027] (1) High-temperature roasting: Take 1000g of low-grade cobalt-nickel-copper hydrometallurgical waste water slag, in which, by weight percentage, the cobalt content is 0.21%, the nickel content is 0.62%, the copper content is 0.72%, and the moisture content is 70.5%. In addition, the cobalt-nickel-copper hydrometallurgical wastewater slag contains impurities such as iron and aluminum;

[0028] Drying and weathering, roasting in a rotary kiln or a muffle furnace at a high temperature of 500°C for 2 hours to produce 275g waste water slag particles, with an average particle size of 15 μm;

[0029] (2) Acid leaching: According to the solid-liquid ratio of 1:4, take the waste water residue particles in step (1) into 25g / L sulfuric acid solution 1100ml for leaching, and add 30g sodium sulfite at the same time, adjust the pH value of sulfuric acid so...

Example Embodiment

[0035] Example two

[0036] A method for treating cobalt-nickel-copper hydrometallurgical waste water slag and sludge includes the following steps:

[0037] (1) High-temperature roasting: Take 1000g of low-grade cobalt-nickel-copper hydrometallurgical waste water slag, in which, by weight percentage, the cobalt content is 0.21%, the nickel content is 0.62%, the copper content is 0.72%, and the moisture content is 70.5%. In addition, the cobalt-nickel-copper hydrometallurgical wastewater slag contains impurities such as iron and aluminum;

[0038] Drying and weathering, roasting in a rotary kiln or muffle furnace at 700°C for 1 hour to produce 261g waste water slag particles, the average particle size of the waste slag particles is 10μm;

[0039] (2) Acid leaching: According to the solid-liquid ratio of 1:4, the waste water residue particles in step (1) are poured into 1044ml of 35g / L sulfuric acid solution for leaching. At the same time, 25g of sodium sulfite is added, and the pH valu...

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Abstract

The present invention provides a method for treating cobalt-nickel-copper hydrometallurgy wastewater residue. The method comprises the following steps: high temperature calcination, acid leaching, copper and zinc recovery, iron and aluminum removal, cobalt and manganese recovery, and nickel recovery. The method can be used for treating various cobalt-nickel-copper hydrometallurgy wastewater residues having different components having different contents, especially for treating low-grade cobalt-nickel-copper hydrometallurgy wastewater residue. According to the present invention, the suitable leaching conditions and the reasonable separation technology are provided to achieve separately recovery of cobalt, nickel, copper, zinc, manganese and a plurality of valuable metals so as to maximize resource recycling; and compared to the conventional acid leaching method, the method of the present invention has characteristics of large treatment amount, low cost, high metal recovery rate and easy performing, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for treating cobalt-nickel-copper hydrometallurgical waste water slag. Background technique [0002] In the process of cobalt-nickel-copper non-ferrous metal hydrometallurgy, industrial wastewater will inevitably be produced, mainly including leaching wastewater, extraction wastewater, synthetic precipitation wastewater and other wastewater. After the wastewater is treated, the metals contained in it are mainly precipitated in the form of hydroxides to form waste water slag (part of the waste water slag is also precipitated and deposited at the bottom of the waste water tank in the form of sludge). Because these wastewater slags contain valuable metals such as cobalt, nickel, copper and zinc, if they are not properly treated, they will cause secondary pollution to the environment, and if they are not treated, they will only take up a lot of land and will cost money to...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B1/02C22B3/06C22B15/00C22B19/30C22B23/00C22B47/00
CPCY02P10/20
Inventor 王勤何显达陈艳红谭翠丽张礼明郭苗苗
Owner GEM CO LTD
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