B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
18/946
B01J 2/12 (2006.01) C01B 17/10 (2006.01)
Patent
CA 1110025
ABSTRACT OF THE DISCLOSURE A process is disclosed for the production of granular sulfur in a rotating drum in which molten sulfur at a temperature within the range of about 110° to 160°C, more pre- ferably about 119 to 159°C and most preferably about 130 to 158°C or about 10 to about 40 Celsius degrees above the sulfur melting temperature, is sprayed in a contact zone onto a bed of moving sulfur particles and a continuous curtain of said particles and resulting particles are passed to a cooling zone prior to discharge. A countercurrent flow of substantially inert cooling gas at a temperature in the range of about 10 to 50°C and containing not more than 8% by volume oxygen is intro- duced to the cooling zone and a portion or all of said cooling gas is passed through the contact zone. The contact and cooling zones can be formed in a single rotating drum and separated from each other by a retaining ring or formed in separate vessels. The latter embodiment permits reduction in the total demand for cooling gas and enhances gas velocity and temperature controls in the contact zone by circulating a portion only of cooling gas through the contact zone. Discharge particles from the cooling zone are separated according to size and undersized particles are recycled as fines to the contact zone at a ratio of 4:1 to 2:1 of fines to product granules. Granular sulfur which is substantially pure, resistant to attrition, hard, and uniformly and closely sized is produced by a process wherein explosion hazard is substantially avoided.
296012
Higgins John T.
Hildred Gordon C.
Cominco Ltd.
Gowling Lafleur Henderson Llp
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