Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coal

Ya-li Feng, Zhen-lei Cai, Hao-ran Li, Zhu-wei Du, Xin-wei Liu

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    Cite this article as:

    Ya-li Feng, Zhen-lei Cai, Hao-ran Li, Zhu-wei Du, and Xin-wei Liu, Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coal, Int. J. Miner. Metall. Mater., 20(2013), No. 3, pp.221-227. https://dx.doi.org/10.1007/s12613-013-0716-5
    Ya-li Feng, Zhen-lei Cai, Hao-ran Li, Zhu-wei Du, and Xin-wei Liu, Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coal, Int. J. Miner. Metall. Mater., 20(2013), No. 3, pp.221-227. https://dx.doi.org/10.1007/s12613-013-0716-5
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    Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coal

    基金项目: 

    the National High Technology Research and Development Program of China (No. 2012AA062401)

    the Fundamental Reserarch Funds for the Central Universities of China (No. FRT-TP-09-002B).

    supported by the National Natural Science Foundation of China (Nos. 21176026 and 21176242)

    China Ocean Mineral resources R&D Association (No. DY125-15-T-08)

    the National Key Technology R&D Program of China (Nos.2012BAB07B05 and 2012BAB14B05)

      通信作者:

      Ya-li Feng E-mail: ylfeng126@126.com

    Based on the fluidized roasting reduction technology of low-grade pyrolusite coupling with pretreatment of stone coal, the manganese reduction efficiency was investigated and technical conditions were optimized. It is found that the optimum manganese reduction efficiency can be up to 98.97% under the conditions that the mass ratio of stone coal to pyrolusite is 3:1, the roasting temperature of stone coal is 1000℃, the roasting temperature of pyrolusite is 800℃, and the roasting time is 2 h. Other low-grade pyrolusite ores in China from Guangxi, Hunan, and Guizhou Provinces were tested and all these minerals responded well, giving ~99% manganese reduction efficiency. Meanwhile, the reduction kinetic model has been established. It is confirmed that the reduction process is controlled by the interface chemical reaction. The apparent activation energy is 36.397 kJ/mol.

     

    Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coal

    Author Affilications
    • Funds: 

      the National High Technology Research and Development Program of China (No. 2012AA062401)

      the Fundamental Reserarch Funds for the Central Universities of China (No. FRT-TP-09-002B).

      supported by the National Natural Science Foundation of China (Nos. 21176026 and 21176242)

      China Ocean Mineral resources R&D Association (No. DY125-15-T-08)

      the National Key Technology R&D Program of China (Nos.2012BAB07B05 and 2012BAB14B05)

    • Received: 25 May 2012; Revised: 25 June 2012; Accepted: 27 June 2012;
    Based on the fluidized roasting reduction technology of low-grade pyrolusite coupling with pretreatment of stone coal, the manganese reduction efficiency was investigated and technical conditions were optimized. It is found that the optimum manganese reduction efficiency can be up to 98.97% under the conditions that the mass ratio of stone coal to pyrolusite is 3:1, the roasting temperature of stone coal is 1000℃, the roasting temperature of pyrolusite is 800℃, and the roasting time is 2 h. Other low-grade pyrolusite ores in China from Guangxi, Hunan, and Guizhou Provinces were tested and all these minerals responded well, giving ~99% manganese reduction efficiency. Meanwhile, the reduction kinetic model has been established. It is confirmed that the reduction process is controlled by the interface chemical reaction. The apparent activation energy is 36.397 kJ/mol.

     

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