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| MECHANISM OF DECOMPOSITION OF BARITE IN PROCESS OF SINTERING JIUQUAN BARITECONTAINING IRON ORE CONCENTRATE |
| by REN Yunfu; FENG Lin (Beijing University of Iron and Steel Technology) |
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Cite this article:
by REN Yunfu; FENG Lin (Beijing University of Iron and Steel Technology). MECHANISM OF DECOMPOSITION OF BARITE IN PROCESS OF SINTERING JIUQUAN BARITECONTAINING IRON ORE CONCENTRATE. Acta Metall Sin, 1986, 22(4): 86-92.
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Abstract The study was carried out on the decomposition mechanism of barite in the sintering mixtures of Jiuquan barite-containing iron ore concentrate during sintering, and on the interaction between barite and other constituents It showed that the decomposition of barite in sintering mixtures started at 1190℃ in air, and reached its maximum rate at 1240℃ During sintering, the decomposition mechanism of barite is the solid-state reaction between barite and Fe_2O_3 which takes place at high temperatures and the product under oxidized atmosphere is BaO.6Fe_2O_3 For the sintered Jiuquan sintering mixtures the product is (BaO. 6Fe_2O_3). 1.81 (CaO.2Fe_2O_3) The apparent activation energy of barite decomposition in air is 119.9 kJ/mol and the order of reaction is 1.3—1.4 obtained by kinetical calculation.
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Received: 18 April 1986
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