Cleaning and recycling technology of neodymium iron boron waste

Abstract

A cleaning and recycling technology of neodymium iron boron waste is disclosed. The technology comprises following steps: (1) throwing the neodymium iron boron waste into a pot, boiling the neodymium iron boron waste with water and caustic soda, and removing the oil; (2) putting the neodymium iron boron waste into a roller machine, adding detergent and water, rolling adequately to remove the oil stains and slurries on the surfaces of the neodymium iron boron waste; (3) pouring the neodymium iron boron waste into a material frame, washing with water, and filtering to dry; (4) putting the neodymium iron boron waste into the roller machine again, adding sawdust into the roller machine too, rolling with the sawdust to remove the oil stains and slurries on the surfaces of the neodymium iron boron waste; (5) putting the neodymium iron boron waste into a vibrating screen classifier to remove the sawdust; (6) putting the neodymium iron boron waste into a oven to dry in low temperature; (7) removing the impurities by manual work, blowing to remove the dust and sawdust so as to obtain the neodymium iron boron waste, which is oil-stainless on the surface, no slurry, no water and contains few impurities. The neodymium iron boron waste can be cleaned and recycled in a safe, high-efficient and low-cost way through the steps mentioned above, furthermore, the neodymium iron boron waste will not be oxidized during the cleaning and recycling process, the loss is small, the quality is stable, and the technology is suitable for recycling of large amount of waste.

Description

technical field [0001] The invention relates to a process for cleaning and recycling NdFeB waste materials. Background technique [0002] At present, there are mainly two cleaning and recycling processes for NdFeB magnet waste commonly used in the industry: one is pickling; the other is high-temperature direct fire blowing. With pickling, the material loss is large, the operation is dangerous, the discharged sewage is easy to pollute the environment, and the production efficiency is low; while the high-temperature fire is used for blowing, the waste after treatment contains many impurities, especially the high mud content, and the high-temperature fire is easy to bake. Oxidize the surface layer of the waste, make the quality of the waste worse, and affect the recycling value. Contents of the invention [0003] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a clean recycling process for NdFeB waste that is safe and pr...

AI Technical Summary

Problems solved by technology

With pickling, the material loss is large, the operation is dangerous, the discharged sewage is easy to pollute the environment, and the production efficiency is low; while the high-temperature fire is used for blowing, the waste after treatment contains many impurities, especially the high mud content, and the high-temperature fire is easy to bake. Oxidize the surface layer of the waste, make the quality of the waste worse, and affect the value of recycling