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| Experimen on coal char reductive decomposition and #br#
sintering flue gas desulfurization gypsum |
| SONG Weiming1,2，ZHOU Jianan1,2，LI Shu1,2，YANG Jian1,2 |
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Abstract Aiming at the problem of comprehensive utilization of the flue gas desulfurization gypsum，a new method for preparing CaO and SO2 by using the coal char to reduce and decompose gypsum was proposed. The hightemperature reaction characteristics of coal char and desulfurization gypsum were calculated by FactSage 6.1，and the behavior of coal char reduction and decomposition gypsum was theoretically analyzed by a thermogravimetric analyzer. Effects of temperature，coal coke addition and holding time on the gypsum decomposition rate，solid product and gas SO2release were further studied by tubular resistance furnace experiments. The results show that increasing the temperature，increasing the amount of coal char and increasing the holding time can increase the decomposition rate of gypsum. When the amount of coal coke increases from 5% to 20%，the mass percent of CaO and SO2 increases first and then decreases，while the mass percent of CaS always increases. When the coal coke amount is 11%，the content of CaO and SO2 reaches the maximum value. The variation of CaO and SO2 components is mainly affected by the relative contents of CaS and CaSO4. The use of coal char to reduce and decompose gypsum can provide a theoretical guidance for the comprehensive utilization of gypsum.
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Received: 22 January 2019
Published: 15 November 2019
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[3].
|
| [1] |
Oades R D, Simon H, Moal M L.Modulation by dopaminergic neurons of neurobiological systems processing strategies in adaptive behaviour and learning[J].Behavioural Processes, 2013, 10(1):180-181
|
| [2] |
中国环境保护产业协会脱硫脱硝委员会.我国脱硫脱硝行业2016年发展综述[J]. 中国环保产业, 2017(12):5-18.
|
|
[3].
|
| [4] |
Yang Y, Huang Q, Wang Q.Ignoring emissions of Hg from coal ash and desulfurized gypsum will lead to ineffective mercury control in coal-fired power plants in China[J].Environmental Science & Technology, 2012, 46(6):3058-9
|
| [4] |
Yang Y, Huang Q, Wang Q.Ignoring emissions of Hg from coal ash and desulfurized gypsum will lead to ineffective mercury control in coal-fired power plants in China[J].Environmental Science & Technology, 2012, 46(6):3058-9
|
| [5] |
Audry S, Grosbois C, Bril H, et al.Post-depositional redistribution of trace metals in reservoir sediments of a miningsmelting-impacted watershed (the Lot River,SW France)[J].Applied Geochemistry, 2010, 25(6):778-794
|
| [5] |
Audry S, Grosbois C, Bril H, et al.Post-depositional redistribution of trace metals in reservoir sediments of a miningsmelting-impacted watershed (the Lot River,SW France)[J].Applied Geochemistry, 2010, 25(6):778-794
|
| [6] |
Zhao S, Li C, Ma L, et al.Process Characteristics of Synthesis Calcium Carbonate Using Desulfurization Gypsum in Integrated Reaction and Separation Equipment[J].Industrial & Engineering Chemistry Research, 2017, 56(46):13945-13954
|
| [6] |
Zhao S, Li C, Ma L, et al.Process Characteristics of Synthesis Calcium Carbonate Using Desulfurization Gypsum in Integrated Reaction and Separation Equipment[J].Industrial & Engineering Chemistry Research, 2017, 56(46):13945-13954
|
| [7] |
Ferrari G, Miyamoto M, Ferrari A.New sustainable technology for recycling returned concrete[J]. Construction & Building Materials, 2014, 67:353-359.
|
| [7] |
Ferrari G, Miyamoto M, Ferrari A.New sustainable technology for recycling returned concrete[J]. Construction & Building Materials, 2014, 67:353-359.
|
| [8] |
Miao Z, Yang H, Wu Y, et al.Experimental Studies on Decomposing Properties of Desulfurization Gypsum in a Thermogravimetric Analyzer and Multiatmosphere Fluidized Beds[J].Industrial & Engineering Chemistry Research, 2012, 51(15):5419-5423
|
| [9] |
Ma L P, Ning P, Zheng S, et al.Reaction Mechanism and Kinetic Analysis of the Decomposition of Phosphogypsum via a Solid-State Reaction[J].Industrial & Engineering Chemistry Research, 2010, 49(8):3597-3602
|
| [8] |
Miao Z, Yang H, Wu Y, et al.Experimental Studies on Decomposing Properties of Desulfurization Gypsum in a Thermogravimetric Analyzer and Multiatmosphere Fluidized Beds[J].Industrial & Engineering Chemistry Research, 2012, 51(15):5419-5423
|
| [9] |
Ma L P, Ning P, Zheng S, et al.Reaction Mechanism and Kinetic Analysis of the Decomposition of Phosphogypsum via a Solid-State Reaction[J].Industrial & Engineering Chemistry Research, 2010, 49(8):3597-3602
|
| [10] |
Ji Z H, Chen J, Guo Y, et al.Magnetite and anthracite assisted microwave heating flue gas desulfurization gypsum[J]. Chemical Engineering and Processing: Process Intensification, 2016, 105:73-78.
|
| [11] |
Taher M A.Influence of thermally treated phosphogypsum on the properties of Portland slag cement[J].Resources Conservation & Recycling, 2008, 52(1):28-38
|
| [10] |
Ji Z H, Chen J, Guo Y, et al.Magnetite and anthracite assisted microwave heating flue gas desulfurization gypsum[J]. Chemical Engineering and Processing: Process Intensification, 2016, 105:73-78.
|
| [12] |
Nielsen A R, Larsen M B, Glarborg P, et al.Sulfur Release from Cement Raw Materials during Solid Fuel Combustion[J].Energy & Fuels, 2011, 25(9):3917-3924
|
| [11] |
Taher M A.Influence of thermally treated phosphogypsum on the properties of Portland slag cement[J].Resources Conservation & Recycling, 2008, 52(1):28-38
|
| [12] |
Nielsen A R, Larsen M B, Glarborg P, et al.Sulfur Release from Cement Raw Materials during Solid Fuel Combustion[J].Energy & Fuels, 2011, 25(9):3917-3924
|
| [13] |
Merwe E M V D, Strydom C A, Potgieter J H.Thermogravimetric analysis of the reaction between carbon and CaSO4·2H2O,gypsum and phosphogypsum in an inert atmosphere[J].Thermochimica Acta, 1999, 340-341(7):431-437
|
| [14] |
资泽城，马丽萍，马俊，等.杂质对磷石膏碳粉还原分解的影响研究[J].硅酸盐通报, 2014, 33(11):2772-2777
|
| [15] |
ZI Ze-cheng, MA Li-ping, MA Jun, et al.Effect of Impurities on the Reductive Decomposition of Phosphogypsum by Powdered Carbon[J].Bulletin of the Chinese Ceramic Society, 2014, 33(11):2772-2777
|
| [13] |
Merwe E M V D, Strydom C A, Potgieter J H.Thermogravimetric analysis of the reaction between carbon and CaSO4·2H2O,gypsum and phosphogypsum in an inert atmosphere[J].Thermochimica Acta, 1999, 340-341(7):431-437
|
| [14] |
资泽城，马丽萍，马俊，等.杂质对磷石膏碳粉还原分解的影响研究[J].硅酸盐通报, 2014, 33(11):2772-2777
|
| [16] |
Jia X, Wang Q, Cen K, et al.An experimental study of CaSO4 decomposition during coal pyrolysis[J].Fuel, 2016, 163(1):157-165
|
| [15] |
ZI Ze-cheng, MA Li-ping, MA Jun, et al.Effect of Impurities on the Reductive Decomposition of Phosphogypsum by Powdered Carbon[J].Bulletin of the Chinese Ceramic Society, 2014, 33(11):2772-2777
|
| [17] |
Kamphuis B, Potma A W, Prins W, et al.The reductive decomposition of calcium sulphate—IKinetics of the apparent solid—solid reaction[J].Chemical Engineering Science, 1992, 48(1):105-116
|
| [16] |
Jia X, Wang Q, Cen K, et al.An experimental study of CaSO4 decomposition during coal pyrolysis[J].Fuel, 2016, 163(1):157-165
|
| [17] |
Kamphuis B, Potma A W, Prins W, et al.The reductive decomposition of calcium sulphate—IKinetics of the apparent solid—solid reaction[J].Chemical Engineering Science, 1992, 48(1):105-116
|
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2019, Vol. 54 
