METHOD FOR RESOURCE RECYCLING OF NICKEL-IRON ALLOY AND USE THEREOF
A method for resource recycling of a nickel-iron alloy and use thereof. The method comprises the following steps: (1) ball-milling, pulverizing, and sieving a nickel-iron alloy to obtain a nickel-iron alloy powder; (2) leaching the nickel-iron alloy powder with an acid solution, heating and stirring...
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Main Authors | , , , , , , |
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Format | Patent |
Language | Chinese English French |
Published |
11.08.2022
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Subjects | |
Online Access | Get full text |
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Summary: | A method for resource recycling of a nickel-iron alloy and use thereof. The method comprises the following steps: (1) ball-milling, pulverizing, and sieving a nickel-iron alloy to obtain a nickel-iron alloy powder; (2) leaching the nickel-iron alloy powder with an acid solution, heating and stirring, and filtering to obtain a leaching solution and a leaching residue; (3) adding a phosphorus source to the leaching solution, mixing and stirring, heating, and filtering to obtain iron phosphate and a post-precipitation solution; and (4) adding a neutralizing agent to the post-precipitation solution, heating and stirring, and filtering to obtain a nickel-containing solution. After the nickel-iron alloy is dissolved using the acid solution, iron phosphate is prepared under the effects of the phosphorus source or the phosphorus source plus an oxidant, and a precipitation aid. Further, a lithium iron phosphate positive electrode material can be prepared by using iron phosphate as a precursor of lithium iron phosphate |
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Bibliography: | Application Number: WO2021CN93666 |