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Experimental Study on the Refining Desulfurization Slag Made from the Reduced Red Mud
Author(s) -
Kai Dong,
Long Wu,
Wenjuan Liu,
Rong Zhu
Publication year - 2015
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400181
Subject(s) - red mud , flue gas desulfurization , refining (metallurgy) , slag (welding) , metallurgy , bayer process , metal , materials science , aluminium , sulfur , waste management , chemistry , engineering
Red mud is unmanageable industrial waste produced from aluminum industry, which is difficult to be disposed and recycled with traditional method. In this paper, refining desulfurization slag was made from the reduced red mud, and the desulfurization abilities of the slag and the recovery rates of the metal Fe are studied. With thermodynamic simulation, orthogonal experiments, and verification experiment, it is found that binary basicity has significant effect on L S and η s , while the effects of Al 2 O 3 concentration in slag and the quantity of the reduced red mud are not obvious. The optimal combination with the best desulfurization ability can be derived as A 3 B 2 C 2 , which means the binary basicity of the optimal slag is 7, the concentration of Al 2 O 3 is 30%, and the wt% of the residue is 15%, which means the reduced red mud quantity is 132.92 g. At the same time, the recovery rate of Fe element increases with the quantity of the reduced red mud, and the recovery rate of metal Fe in optimal combination slag is 87.84%. The separation of the metal Fe from the reduced red mud is satisfactory. The refining desulfurization slag manufacturing is a feasible method on the disposal and recycling of the red mud.