ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The formation of sulfate sulfur during roasting of Chinese molybdenite concentrate

J. Beňa, M. Gregor, and J. Bizmár

Slovak Technical University, Bratislava

Abstract: During production of ferromolybdenum, MoO₃ is formed by oxidizing roasting of MoS₂, but some residual S remains in the sulfate form which is not desirable. During roasting of Chinese molybdenite concentrate, all of the S is bound as Fe₂(SO₄)₃ and Al₂(SO₄)₃. In view of this fact and by applying thermodynamic equations, Kp = (27/4)̅P₂SO₃(̅PT̅ P₂SO₃)-3, a table was made showing at given SO₃ content in the smelter gas, the temp. (600-50°) at which the sulfates are not formed.

Full paper in Portable Document Format: 1710-11a765.pdf (in Slovak)

Chemical Papers 17 (10-11) 765–775 (1963)