http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109704376-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F7-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F7-06 |
| filingDate | 2019-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109704376-B |
| titleOfInvention | Bayer process production method for co-producing chemical aluminum oxide |
| abstract | The invention relates to the technical field of alumina production, and particularly discloses a method for producing alumina by a Bayer process and co-producing chemicals. The method is characterized in that causticized liquid obtained by a pseudo-boehmite production system or superfine aluminum hydroxide product washing liquid in a superfine aluminum hydroxide production system is sent to the middle of a mud layer of a red mud separation settling tank to any position between the upper parts of red mud primary washing settling tanks, and the causticized liquid or the superfine aluminum hydroxide product washing liquid enters the red mud primary washing settling tank along with the red mud underflow of the red mud separation settling tank. The causticized liquid or the ultrafine aluminum hydroxide product washing liquid is digested and absorbed in a Bayer process production system, so that the evaporation steam consumption is saved. The method can also effectively solve the problem of sodium aluminate solution hydrolysis in the Bayer process production system, and the digestion step can further reduce the molecular ratio of the digested slurry and improve the cycle efficiency, so that the bottleneck problem of low yield of the Bayer process production system can be effectively solved, and an ideal way for energy conservation, consumption reduction and cycle efficiency improvement of the Bayer process is found. |
| priorityDate | 2019-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.