Control criterion of low-sulfur sintering materials based on sulfur balance calculations

Sulfur balance calculations were performed according to production data from Shougang Jingtang Steel Sintering Plant. The impact weight of each sintering material on SO₂ concentration in sintering waste gas was analyzed, based on which some reasonable assumptions were made. In combination with the uniform measurement method of SO₂ emission concentration for different sintering machines in Chinese standards, a relation formula between sulfur content in the sintering materials and judging index for SO₂ emission concentration was deduced and a control criterion for low-sulfur sintering materials was established. If Shougang Jingtang Steel Sintering Plant wants to meet the SO₂ emission concentration of 500 mg·m^-3, the sulfur content in the sintering mixture need reduce to below 0. 032%; if it wants to meet the SO₂ emission concentration of 200 mg·m^-3, the sulfur content in the sintering mixture need reduce to below 0. 013%, but it is very difficult to realize under the current material condition.