http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110467185-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-037 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-037 |
| filingDate | 2019-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110467185-B |
| titleOfInvention | Silicon material dephosphorization purification additive and purification method |
| abstract | The invention relates to a silicon material dephosphorization purification additive and a purification method. The additive is prepared by mixing one or more of cryolite, titanium-containing halide, vanadium-containing halide, alkali metal halide, alkaline earth metal halide and aluminum fluoride in any proportion. The purification method for removing phosphorus from the silicon material by using the additive comprises the following steps: heating and melting the silicon raw material, the metal medium and the additive, and uniformly stirring to carry out slagging and refining; after slagging and refining are finished, separating the obtained slag phase from the silicon alloy and then cooling the slag phase or cooling the obtained slag phase from the silicon alloy and then separating the slag phase and the silicon alloy; soaking the silicon alloy obtained after separation in an acid solution, dissolving and removing metal media in the silicon alloy, and then drying the obtained silicon material; repeating the steps for 1-4 times until the phosphorus content in the silicon material meets the purity requirement. The additive of the invention reduces the temperature of refining boron removal to 600-1300 ℃, has low energy consumption and obvious effect of removing phosphorus. |
| priorityDate | 2019-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.