磷尾矿热分解动力学机理与煅烧工艺研究

doi:10.19964/j.issn.1006-4990.2022-0295

Abstract

Abstract:

Relatively high content of calcium，magnesium and phosphorus exists in phosphorus tailings.To produce magnesium salt from phosphorus tailings by calcination-leaching process，it is necessary to calcine and decompose phosphorus tailings into CaO and MgO to achieve the purpose of activation and purification.The thermal decomposition mechanism of phosphorus tailings is of great significance to the quality of magnesium salt and selection of calcination process.The thermal decomposition kinetic characteristics and calcination process of phosphorus tailings were explored，so as to provide theoretical guidance for the recycling of phosphorus tailings resources.The results showed that the non isothermal thermal decomposition process of phosphorus tailings could be divided into two stages in the process of heating rate of 10 ℃/min and calcination temperature rising from 25 ℃ to 1 000 ℃.Dolomite was decomposed into the first stage of calcium carbonate and magnesium oxide at 400 ℃ to 500 ℃，and calcium carbonate was decomposed into the second stage of calcium oxide at 700 ℃ to 900 ℃.The corresponding kinetic equations of thermal decomposition were established respectively.The better calcination conditions were calcination temperature of 900 ℃，calcination time of 4 h，heating rate of 15 ℃/min，tailings size of less than 0.150 mm.

Key words: phosphate ore tailings, calcination, thermal decomposition, mechanism, non-isothermal kinetics

CLC Number:

TF046

ZHOU Qiang, WU Bin, CHEN Kui, JI Lijun, WU Yanyang. Study on thermal decomposition kinetic mechanism and calcination process of phosphorus tailings[J]. Inorganic Chemicals Industry, 2023, 55(3): 47-54.

Figures/Tables 14

Table 1

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

References 17

1	李鹏毅，张冬冬，宁平，等.磷尾矿资源化利用研究[J].化工矿物与加工，2019，48（2）:66-70.
	LI Pengyi， ZHANG Dongdong， NING Ping，et al.Study on resource utilization of phosphate tailings[J].Industrial Minerals & Processing，2019，48（2）:66-70.
2	马会娟，杨成，潘志权，等.磷尾矿制备硫酸镁试验研究[J].非金属矿，2017，40（1）:93-95.
	MA Huijuan， YANG Cheng， PAN Zhiquan，et al.Experimental study on the preparation of magnesium sulfate from phosphate tailings[J].Non-Metallic Mines，2017，40（1）:93-95.
3	田兴.反浮选磷尾矿的综合利用[D].武汉:武汉工程大学，2013.
	TIAN Xing.Comprehensive utilization of phosphate tailings from reverse floatation[D].Wuhan:Wuhan Institute of Technology，2013.
4	苗俊艳，王艳语，许秀成.中低品位磷矿及磷尾矿的综合利用现状[J].硫磷设计与粉体工程，2019（6）:11-13，27.
	MIAO Junyan， WANG Yanyu， XU Xiucheng.Current utilization of medium- and low-grade phosphate ore and tailing[J].Sulphur Phosphorus & Bulk Materials Handling Related Engineering，2019（6）:11-13，27.
5	高贺然，黄远来，邱跃琴，等.减水剂对磷尾矿胶结充填料浆输送流动性能影响研究[J].矿冶工程，2018，38（1）:30-34.
	GAO Heran， HUANG Yuanlai， QIU Yueqin，et al.Influence of water reducer on fluidity of phosphate tailings cemented paste backfill[J].Mining and Metallurgical Engineering，2018，38（1）:30-34.
6	黄芳，王华，李军旗，等.萃取-反萃法综合回收磷矿浮选尾矿中磷和镁[J].环境科学与技术，2010，33（4）:104-107，140.
	HUANG Fang， WANG Hua， LI Junqi，et al.Recovering P and Mg from phosphate floatation tailings using extraction-stripping process[J].Environmental Science & Technology，2010，33（4）:104-107，140.
7	谢娟，刘松林，陶绍程，等.高镁磷尾矿碳化法制备碱式碳酸镁研究[J].无机盐工业，2021，53（12）:135-139.
	XIE Juan， LIU Songlin， TAO Shaocheng，et al.Study on preparation of magnesium carbonate hydroxide by carbonization method from high-Mg phosphate tailings[J].Inorganic Chemicals Industry，2021，53（12）:135-139.
8	周佳琦，陈葵，武斌，等.磷尾矿煅烧及酸浸过程动力学研究[J].无机盐工业，2022，54（1）:77-82，108.
	ZHOU Jiaqi， CHEN Kui， WU Bin，et al.Study on kinetics of phosphate tailings calcination and acid leaching process[J].Inorganic Chemicals Industry，2022，54（1）:77-82，108.
9	陈永弟.白云石的热分解规律及其应用[D].长春:吉林大学，2012.
	CHEN Yongdi.The thermal decomposition behavior of dolomite and application[D].Changchun:Jilin University，2012.
10	林小化，张煜，廖裕辉，等.煅烧条件对白云石质磷尾矿热分解规律的影响[J].化工矿物与加工，2019，48（1）:31-35，39.
	LIN Xiaohua， ZHANG Yu， LIAO Yuhui，et al.Effect of calcining conditions on thermal decomposition of dolomite phosphate tailings[J].Industrial Minerals & Processing，2019，48（1）:31-35，39.
11	王景峰，胡宏.瓮福磷尾矿热分解过程研究[J].煤炭与化工，2013，36（3）:29-31，67.
	WANG Jingfeng， HU Hong.Study on thermal decompose process of Wengfu phosphorus tailing[J].Coal and Chemical Industry，2013，36（3）:29-31，67.
12	李沛伦，邱显扬，胡真，等.复杂Mn-Ag-Cu结合矿的浸出机理及工业优化[J].中国有色金属学报，2022，32（2）:563-573.
	LI Peilun， QIU Xianyang， HU Zhen，et al.Mechanism of leaching on complex Mn-Ag-Cu bound ore and industrial optimizations[J].The Chinese Journal of Nonferrous Metals，2022，32（2）:563-573.
13	魏君，邓强，刘雪梅，等.HSC Chemistry在电动势法测定化学热力学函数中的应用[J].广东化工，2017，44（11）:279-280， 283.
	WEI Jun， DENG Qiang， LIU Xuemei，et al.Application of HSC chemistry software in the determination of chemical thermodynamic function by measuring electromotance[J].Guangdong Chemical Industry，2017，44（11）:279-280，283.
14	李宁.HSC Chemistry软件在高校化学科研中的应用[J].化工管理，2016（17）:74.
	LI Ning.The application of HSC Chemistry software in chemical research in colleges and universities[J].Chemical Management，2016（17）:74.
15	郭满满，肖卓炳，于华忠，等.热重法研究绿原酸的热稳定性、分解动力学及贮存期[J].药物评价研究，2011，34（5）:348-352.
	GUO Manman， XIAO Zhuobing， YU Huazhong，et al.Study on thermal stability，decomposition kinetics，and shelf life of chlorogenic acid by thermogravimetry method[J].Drug Evaluation Research，2011，34（5）:348-352.
16	刘小星，李陇岗，杨建元，等.改进Freeman-Carroll法求算氢氧化镁热分解动力学参数研究[J].广州化工，2012，40（14）:32-33.
	LIU Xiaoxing， LI Longgang， YANG Jianyuan，et al.Studies on the calculation of the kinetic parameters of Mg（OH）₂ thermo-decomposition by improved Freeman-carroll method[J].Guangzhou Chemical Industry，2012，40（14）:32-33.
17	张英明，王兵毅，余坚，等.三氧化二铝对环氧树脂固化动力学及热降解动力学的影响[J].广东工业大学学报，2019，36（5）:63-70.
	ZHANG Yingming， WANG Bingyi， YU Jian，et al.Effects of aluminum oxide on curing and thermal decomposition kinetics of epoxy resin[J].Journal of Guangdong University of Technology，2019，36（5）:63-70.

项目	化学成分质量分数/%
项目	CaO	MgO	P₂O₅	Al₂O₃	Fe₂O₃	S	SiO₂	CO₂
磷尾矿	28.14	17.3	9.175	1.52	3.10	1.43	5.411	33.8

[1]	LI Yongxiang, LIU Chenxi, LI Yundong, MA Hang, MEI Lianping, DANG Hui, SUN Zhi, WAN Banglong. Research progress of preparation technology of black phosphorus [J]. Inorganic Chemicals Industry, 2025, 57(3): 18-29.
[2]	LI Chao, WANG Liping, GAO Guimei, ZHANG Yunfeng, HONG Yu, LIU Darui, XU Lijun, CUI Yongjie. Study on reaction mechanism of acid leaching lithium from circulating fluidized bed fly ash [J]. Inorganic Chemicals Industry, 2025, 57(3): 101-107.
[3]	LI Zihan, ZHANG Jiaqi, LI Shizhuo, LI Xinyu, LIU Shaozhuo, WANG Yihao, HAO Yucui, LIU Jian, LI Yanhua. Study on synthesis and catalytic mechanism of CdS/g-C₃N₄composite photocatalyst [J]. Inorganic Chemicals Industry, 2025, 57(3): 124-132.
[4]	SONG Jiaxi, JI Renfei, CHEN Jun, LIN Sen, YU Jianguo. Research on characteristics analysis and pretreatment on deeply deactivated power battery ternary cathode materials [J]. Inorganic Chemicals Industry, 2025, 57(2): 44-49.
[5]	CHEN Xue, OUYANG Quansheng, SHAO Jiaojing. Recent research progress of lithium-sulfur batteries based on solid-solid reaction mechanism [J]. Inorganic Chemicals Industry, 2024, 56(9): 12-23.
[6]	TANG Dongwu, YE Changwen, DENG Jie, AO Fang. Study on leaching rate of calcium and magnesium from phosphorus tailings based on thermodynamic analysis and response surface method [J]. Inorganic Chemicals Industry, 2024, 56(9): 98-106.
[7]	FANG Fan, YAO Benlin, XIAO Yiqun, JIA Yanhong, CHEN Hui, LI Bin, HE Hui. Research progress on dissolution behavior and mechanism of uranium dioxide in nitric acid [J]. Inorganic Chemicals Industry, 2024, 56(9): 34-43.
[8]	TANG Xuemei, WANG Meibo, XU Li, ZHANG Xujie, TAI Shijun, YI Xianmei, LIU Hongjuan, PAN Linyi. Study on whitening of phosphogypsum by low⁃temperature calcination [J]. Inorganic Chemicals Industry, 2024, 56(8): 110-115.
[9]	LI Zhao, YIN Youyou, LIU Chenhui, WANG Fang, GAO Jiyun. Study on preparation of two⁃dimensional titanium carbide/zinc oxide nanoparticles and their ethanol gas sensitive properties [J]. Inorganic Chemicals Industry, 2024, 56(8): 33-39.
[10]	HU Dian, GUO Ze, ZHANG Hanquan, LU Manman. Research on effects of roasting process and typical impurities on reduction and decomposition process of phosphogypsum [J]. Inorganic Chemicals Industry, 2024, 56(7): 88-95.
[11]	LIU Hui, WANG Hongliang, YU Kun, GAO Shengnan. Effect of calcination on porous structure and electrochemical properties of air electrode [J]. Inorganic Chemicals Industry, 2024, 56(6): 80-86.
[12]	TU Yanping, BAI Dengxian, CHENG Shukai, XIE Junjie, HUANG Zhiliang, CHEN Guofu. Effect of high temperature modification of mineral powder and quicklime on properties of phosphogypsum cement based materials [J]. Inorganic Chemicals Industry, 2024, 56(6): 94-101.
[13]	LI Yuxing, ZHANG Jincai, CHENG Fangqin. Research progress of preparation and growth mechanism of various crystalline nano-calcium carbonate [J]. Inorganic Chemicals Industry, 2024, 56(5): 1-10.
[14]	LI Yongxiang, YANG Xiaolong, LU Zhonghai, MA Hang, WAN Banglong, LI Yundong. Research progress of flame retardant application of ammonium poly-phosphate [J]. Inorganic Chemicals Industry, 2024, 56(5): 20-30.
[15]	FANG Xiaoning, KUANG Fei, LIU Chenglin. Study on extraction of potassium from K-feldspar by roasting-leaching of mixed salts [J]. Inorganic Chemicals Industry, 2024, 56(5): 53-57.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on thermal decomposition kinetic mechanism and calcination process of phosphorus tailings

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 14

References 17

Related Articles 15

Metrics

Comments

Recommended 0