http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109487076-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B59-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B03C1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B1-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B03C1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B59-00 |
| filingDate | 2019-01-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109487076-B |
| titleOfInvention | Method for comprehensively recycling neodymium iron boron waste through flash oxygen-controlled roasting |
| abstract | The invention discloses a method for comprehensively recycling neodymium iron boron waste by flash oxygen-controlled roasting, which comprises the steps of spraying neodymium iron boron waste and mixed gas into a high-temperature vertical reaction tower space through a nozzle, enabling the neodymium iron boron waste to be highly dispersed and float from the upper end to the lower end of the reaction tower, controlling the oxidizing atmosphere in the reaction tower to enable rare earth in the neodymium iron boron waste to be rapidly and fully oxidized, selectively oxidizing iron into high-magnetism ferroferric oxide, and magnetically separating roasted products to respectively obtain an iron-rich phase and a rare earth-rich phase. According to the invention, through flash oxygen-controlled roasting, rare earth in the neodymium iron boron waste is quickly and fully oxidized, iron is strongly magnetized, and then the rare earth and iron are separated by adopting a magnetic separation mode, so that the defects that the traditional neodymium iron boron waste treatment method is long in process, the roasting reaction of a rotary kiln is slow, the rare earth and the iron are simultaneously oxidized, the rare earth and the iron cannot be separated before acid dissolution, the acid-soluble iron slag is large in amount, and the iron resource is difficult to recover are overcome, and the method has good economic and environmental benefits. |
| priorityDate | 2018-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.