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Method for bioleaching valent metal ions in waste battery

A technology of biological leaching and waste batteries, applied in the direction of improving process efficiency, etc., to achieve the effect of improving extraction efficiency and dissolution rate

Inactive Publication Date: 2012-07-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the defect that the dosage of solid materials in waste batteries in the existing bioleaching technology is only 1% (w / v) or less of the volume of the leachate, the purpose of the present invention is to provide a method for extracting waste batteries by bioleaching. The method for valuable metal ions, specifically, relates to a method for efficiently extracting zinc-manganese ions in waste zinc-manganese batteries, lithium-cobalt ions in lithium-ion batteries and nickel-hydrogen The method for nickel-cobalt ions in batteries can significantly improve and enhance the leaching efficiency of bioleaching to valuable metal ions in the three waste batteries under the condition of 2% or higher solid-liquid ratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The waste zinc-manganese batteries are manually disassembled, and the positive and negative battery materials containing zinc-manganese metal ions are recovered, dried at 105°C, ground, and passed through a 40-mesh sieve to obtain waste zinc-manganese electrode materials for bioleaching powder.

[0031] (2) Screening and culturing to obtain bioleaching strains, the specific method is as follows: preparation of Thiobacillus thiooxidans screening medium: solute is: 10.0g / L of sulfur powder, 2.0g / L of (NH 4 ) 2 SO 4 , 1.0g / L of KH 2 PO 4 , 0.5g / L of MgSO 4 ·7H 2 O and 0.25g / L CaCl 2 , the solvent is distilled water, and the pH is 5.5; the preparation of Thiobacillus ferrooxidans screening medium is: solute: 10mL of FeSO 4 ·7H 2 O solution, 2.0g / L (NH 4 ) 2 SO 4 , 1.0g / L of KH 2 PO 4 , 0.5g / L of MgSO 4 ·7H 2 O and 0.25g / L CaCl 2 , the solvent is: distilled water, pH is 5.5; wherein, the FeSO 4 ·7H 2 The mass fraction of O solution was 30%, and the pH w...

Embodiment 2

[0036] (1) With embodiment 1 step (1).

[0037] (2) The biological leaching bacterial strain is domesticated, the method is as follows: preparation of Thiobacillus thiooxidans domestication medium: solute is: sulfur powder of 10.0g / L, (NH of 2.0g / L 4 ) 2 SO 4 , 1.0g / L of KH 2 PO 4 , 0.5g / L of MgSO 4 ·7H 2 O and 0.25g / L CaCl 2 , the solvent is: distilled water, the pH is 5.5; preparation of Thiobacillus ferrooxidans domestication medium: solute: 10mL of FeSO 4 ·7H 2 O solution, 2.0g / L (NH 4 ) 2 SO 4 , 1.0g / L of KH 2 PO 4 , 0.5g / L of MgSO 4 ·7H 2 O and 0.25g / L CaCl 2 , the solvent is: distilled water, pH 5.5, wherein, the FeSO 4 ·7H 2The mass fraction of O solution was 30%, and the pH was 2.0. Inoculate Thiobacillus thiooxidans and Thiobacillus ferrooxidans into corresponding acclimatization medium respectively to obtain corresponding acclimatization culture solution, and add waste zinc-manganese electrode material powder to the acclimatization culture solution...

Embodiment 3

[0041] (1) With embodiment 1 step (1).

[0042] (2) The bioleaching medium for preparing Thiobacillus ferrooxidans is: the solute is: 2.0g / L (NH 4 ) 2 SO 4 , 0.5g / L of MgSO 4 , 0.25g / L of CaCl 2 , 1.0g / L of KH 2 PO 4 , 0.1g / L FeSO 4 And the pyrite of 4.0g / L, solvent is distilled water; The biological leaching medium of preparation Thiobacillus thiooxidans is: solute is: (NH 4 ) 2 SO 4 , 0.5g / L of MgSO 4 , 0.25g / L of CaCl 2 , 1.0g / L of KH 2 PO 4 , 0.1g / L FeSO 4 and 4.0g / L sulfur powder, the solvent is distilled water; each bioleaching medium is divided into 250ml Erlenmeyer flasks according to 100ml / bottle respectively; Thiobacillus ferrooxidans 10% (v / v), obtains the biological leachate of Thiobacillus ferrooxidans; Inserts Thiobacillus thiooxidans 10% (v / v) into the biological leaching medium of Thiobacillus thiooxidans, obtains The biological leachate of Thiobacillus thiooxidans; the two biological leachates were cultured on a shaker at 28° C. and 120 rpm, and...

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Abstract

The invention relates to a method for bioleaching valent metal ions in a waste battery, and belongs to the technical field of harmless treatment and recycling treatment of waste batteries. The method comprises the following steps: recycling electrode material powder containing divalent metal ions from a waste manganese dioxide battery, a waste lithium-ion battery or a waste nickel-metal hydride battery; performing shaking culture on a bioleaching strain in a bioleaching mediums to obtain the biological leachate, when the pH value of the leachate is 0.5 to 2.0, adding the electrode material powder, of which the mass is 2 to 10 percent of the volume of the biological leachate; performing shaking culture, and keeping the pH at 1.5 to 2.5; and finishing bioleaching when the dissolution concentration of the valent metal ions does not increase any longer. Through the adoption of the method, the efficient leaching of the valent metal ions in the waste battery at a 2 percent or more solid-liquid ratio is realized; the effect is obvious; and the method is simple and feasible.

Description

technical field [0001] The invention relates to a method for extracting valuable metal ions in waste batteries by biological leaching, in particular to a method for efficiently extracting zinc and manganese in waste zinc-manganese batteries under the condition of high solid-liquid ratio by using biological leaching technology The invention relates to a method for ions, lithium cobalt ions in lithium ion batteries and nickel cobalt ions in nickel hydrogen batteries, and belongs to the technical field of harmless and resourceful treatment of waste batteries. Background technique [0002] The current use of batteries is penetrating into all aspects of social life at an unprecedented speed, from portable home appliance batteries to high-power power batteries, from consumer batteries to industrial batteries, from button batteries to cylindrical batteries, from primary batteries to secondary batteries; according to statistics, the output and consumption of batteries in the world a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B7/00
CPCY02P10/20
Inventor 辛宝平姜文峰张凯李鑫汉娜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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