METHOD OF OBTAINING SULPHUR FROM EXHAUST METALLURGICAL GASES Russian patent published in 2017 - IPC C01B17/04 B01D53/76 B01D53/86 B01D53/50 

FIELD: metallurgy.

SUBSTANCE: in order to obtain sulfur from exhaust metallurgical gases containing sulfur oxide (IV) SO₂ and oxygen O₂, SO₂ is reduced by gas containing carbon monoxide CO and hydrogen H₂, in a hollow reactor at a temperature of 1100-1350°C. Next, the resulting reduced gas is processed in a catalytic reactor with an aluminium oxide catalyst. An additional amount of gas comprising carbon monoxide and hydrogen is fed into the hollow reactor, to obtain a gas containing hydrogen sulfide H₂S, carbonyl sulphide COS, CO, water, H₂ and unreacted SO₂. The resulting gas is fed into thesulfur condenser to condense it, and then tosulfur production unit by Claus method. Above mentioned temperature is maintained in the hollow reactor by changing the flow of the gas comprising carbon monoxide and hydrogen. Before feeding the mentioned reduced gas to the catalytic reactor, it is cooled in a waste-heat boiler to a temperature of 350-450°C. The catalytic reduction of SO₂ by gas containing carbon monoxide and hydrogen is carried out at a space velocity of 250-500 hr^-1 and at a temperature in a catalyst layer of 400-500°C.

EFFECT: invention ensures higher grade of sulfur extraction from gases and simplifies the process.

18 cl, 1 dwg,1 tbl, 1 ex