| 摘要 |
1,225,206. Oxides of carbon, sulphur, hydrogen sulphide, calcium sulphide, calcium carbonate. BLACK, SIVALLS & BRYSON. 31 March, 1969 [1 April, 1968], No. 16824/69. Heading C1A. [Also in Division C7] Sulphur-bearing carbonaceous fuel is introduced into a bath of molten iron to which air or oxygen is also introduced, the bath being in contact with lime so that a slag containing calcium sulphide is formed, while carbon monoxide is evolved. The latter may be used for chemical processing or burnt to provide heat. The slag is granulated, wetted and contacted with carbon dioxide so that calcium carbonate and hydrogen sulphide are formed from which sulphide, sulphur is recovered; As particularly described, combustion is carried out in vessel 10, the resultant carbon monoxide being burnt in boiler 17 to produce steam. Slag passes to granulator 22, and then to cooler 24 and desulphurizer 27, where it is contacted by upwardly flowing carbon dioxide obtained by the combustion of monoxide. The gas mixture so obtained is divided, one third passing to burner 37 where it is burnt with air, the products being recombined with the remainder in conduit 44, from where the mixture passes to reactor 46 containing a catalyst such as bauxite, so that elemental sulphur may be recovered in condenser 48. |
