| http://www.w3.org/ns/prov#value | - The fused mass is then withdrawn from the furnace, mixed with the carbonaceous material, such as coal, and limestone, and again heated to a high temperature in the furnace, such as 1000 C. This method constitutes an advantage in that, under the action of heat, the sodium thiosulphate is broken up into sodium sul hate and sodium olysulphide (and POSSl ly free sulphur), t e mixture of which is more
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