Reduction-oxidation furnace for making phosphorus by thermal process
US8741226B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 27, 2010 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Jan 13, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B1/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention discloses a reduction-oxidation furnace for thermally refining phosphorus. The reduction-oxidation furnace comprises a furnace body and a blow gun, wherein the furnace body has a slag outlet, a fume outlet, and a melt inlet for feeding melts formed by melting rock phosphate into the furnace body and wherein the blow gun has an end inserted into the furnace body. The content of impurities in fumes containing phosphorus pentaoxide is low, the phosphorus pentaoxide can be easily extracted with a high purity of the phosphorus pentaoxide and at low cost by means of the reduction-oxidation furnace for thermally refining phosphorus according to the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.