西藏卡玛多微晶菱镁矿热分解行为研究

doi:10.19964/j.issn.1006-4990.2022-0305

Abstract

Abstract:

In order to provide theoretical guidance for the development and utilization of Tibet Kamado microcrystalline magnesite，the thermal decomposition characteristics of Tibet microcrystalline magnesite with particle size ≤0.5 mm were studied by thermogravimetric（TG） curve under different heating rates and the thermodynamic calculation was carried out.At the same time，according to the thermogravimetric test data of microcrystalline magnesite，the activation energy of thermal decomposition of Tibet microcrystalline magnesite at different heating rates was calculated by non-isothermal thermogravimetric analysis（FWO method and KAS method）.Finally，the micromorphology of magnesium oxide，the decomposition product of Tibet microcrystalline magnesite was analyzed.The results of decomposition thermodynamics showed that with the increase of heating rate（from 2 ℃/min to 10 ℃/min），the heat required for the decomposition of the microcrystalline magnesite was increased gradually（from 187.93 kJ/mol to 207.08 kJ/mol）.The results of reaction kinetics showed that the activation energies of the microcrystalline magnesite calculated by the FWO method and the KAS method were similar.When the decomposition rate was ≤ 30%，the activation energy of thermal decomposition was decreased sharply with the increase of decomposition rate.When the decomposition rate was >30%，the activation energy of thermal decomposition was decreased slowly with the increase of decomposition rate and gradually became gentle.The microscopic morphology of microcrystalline magnesite decomposition showed that the greater the heating rate，the larger the magnesia grains of the decomposition product.

Key words: microcrystalline magnesite, thermal decomposition behavior, thermodynamics, kinetics

CLC Number:

P619.237

TIAN Xiaoli, LI Zhixun, FENG Runtang, ZHANG Jie, ZHENG Quanfu, SHI Xuwu, DU Yongbin. Study on thermal decomposition behavior of Tibetan Kamado microcrystalline magnesite[J]. Inorganic Chemicals Industry, 2023, 55(3): 60-65.

Figures/Tables 10

Table 1

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

References 12

1	胡生操，王晨晨，付金涛，等.新疆某菱镁矿浮选工艺实验研究[J].矿产综合利用，2022（2）:69-73.
	HU Shengcao， WANG Chenchen， FU Jintao，et al.Research on flotation process test of magnesite in Xinjiang[J].Multipurpose Utilization of Mineral Resources，2022（2）:69-73.
2	鲁志燕，韩露，吴锋，等.新疆尖山菱镁矿一步煅烧制备烧结镁砂[J].耐火材料，2022，56（2）:158-161.
	LU Zhiyan， HAN Lu， WU Feng，et al.Preparation of sintered magnesia by one-step calcination from Xinjiang Jianshan magnesite[J].Refractories，2022，56（2）:158-161.
3	GUO Zongqi， BI Deli， MA Ying，et al.Approaches to high-grade sintered magnesia from natural magnesite[J].China’s Refractories，2020，29（3）:7-12.
4	高陟，马北越，任鑫明，等.利用菱镁矿制备先进镁质材料的研究进展[J].耐火材料，2020，54（1）:88-92.
	GAO Zhi， MA Beiyue， REN Xinming，et al.Research progress of preparing advanced magnesia materials from magnesite[J].Refractories，2020，54（1）:88-92.
5	崔妍，刘新，曲殿利.添加La₂O₃对低品位菱镁矿制备烧结镁砂的影响[J].耐火材料，2020，54（5）:441-443.
	CUI Yan， LIU Xin， QU Dianli.Effect of adding La₂O₃ on preparation of sintered magnesia with low grade magnesite[J].Refractories，2020，54（5）:441-443.
6	王汇平，崔妍，曲殿利.添加La₂O₃对菱镁矿制备烧结镁砂性能的影响[J].耐火材料，2021，55（1）:61-63，68.
	WANG Huiping， CUI Yan， QU Dianli.Effect of La₂O₃ addition on properties of sintered magnesia prepared from magnesite[J].Refractories，2021，55（1）:61-63，68.
7	汪衢，白丽梅，马玉新，等.菱镁矿煅烧制备氧化镁及其活性检测的研究进展[J].有色金属:冶炼部分，2022（1）:36-44.
	WANG Qu， BAI Limei， MA Yuxin，et al.Research progress on preparation of magnesia by calcination of magnesite and its activity detection[J].Nonferrous Metals:Extractive Metallurgy，2022（1）:36-44.
8	BAI Limei， DENG Yufen， LI Xiaoxue，et al.Research on decomposition kinetics of fine grained magnesite[J].Non-Metallic Mines，2016，39（5）:7-9.
9	吴锋，李志坚，曲殿利，等.块状菱镁矿的烧结特性[J].材料研究学报，2012，26（5）:557-560.
	WU Feng， LI Zhijian， QU Dianli，et al.Study on sintering characteristics of block magnesite[J].Chinese Journal of Materials Research，2012，26（5）:557-560.
10	梁英教，车荫昌.无机物热力学数据手册[M].沈阳:东北大学出版社，1993.
11	任伟康.新疆和静菱镁矿烧结实验研究[D].西安:西安建筑科技大学，2017.
	REN Weikang.Experimental research on sintering behavior of XinJiang HeJing magnesite[D].Xi'an:Xi'an University of Architecture and Technology，2017.
12	TIAN Lu， TAHMASEBI A， YU Jianglong.An experimental study on thermal decomposition behavior of magnesite[J].Journal of Thermal Analysis and Calorimetry，2014，118（3）:1577-1584.

项目	化学成分质量分数/%					LOI
项目	SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	LOI
微晶菱镁矿	0.14	0.02	0.03	0.85	47.31	51.78

[1]	FAN Fangfang, TONG Zhongkai, ZUO Weiyuan. Study on adsorption of tetracycline from wastewater by calcium modified peanut shell biochar [J]. Inorganic Chemicals Industry, 2023, 55(6): 109-115.
[2]	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.
[3]	ZHANG Xing,XU Jie,WANG Zibing,HOU Peng,HE Long,LIU Huan. Effect of feedstock particle size on kinetics of limestone thermal decomposition reaction [J]. Inorganic Chemicals Industry, 2023, 55(2): 79-84.
[4]	DING Ning, ZHANG Jian, PING Qingwei, SHENG Xueru, LI Na. Study on adsorption and release properties of matrine by magnesium-modified diatomite [J]. Inorganic Chemicals Industry, 2023, 55(11): 37-46.
[5]	LI Xiyan, ZHANG Hong, LIU Xuejing, YANG Hao, XU Shuai, LI Jiaxin, XIE Jiaqi, XU Guangwen. Study on decomposition characteristic and kinetics of magnesite in inhibitory atmosphere [J]. Inorganic Chemicals Industry, 2023, 55(10): 50-55.
[6]	PENG Jiaoyu, TAN Yuqin, YANG Keli, DONG Yaping, ZHANG Bo, LI Wu. Study on crystallization mechanism and kinetics of macallisterite synthesized with bischofite from salt lake [J]. Inorganic Chemicals Industry, 2023, 55(10): 56-62.
[7]	WU Di, LI Laishi, WANG Junkai, WU Yusheng, WANG Yuzheng, LI Mingchun. Study on decomposition process and thermal decomposition kinetics of ammonium sulfate [J]. Inorganic Chemicals Industry, 2023, 55(10): 86-92.
[8]	ZHU Yue,QIU Shengbo,LIU Chenglin,YU Jianguo. Study on enhancement of spodumene phase reconstruction process by mechanical activation [J]. Inorganic Chemicals Industry, 2023, 55(1): 81-86.
[9]	ZHANG Shaokang,ZHAO Hua,LIU Runjing. Study on macro?kinetics of carbonization reaction of ammonia alkali salt sludge [J]. Inorganic Chemicals Industry, 2022, 54(6): 120-124.
[10]	ZHANG Shaokang,ZHAO Hua,LIU Runjing. Study on macro?kinetics of carbonization reaction of ammonia alkali salt sludge [J]. Inorganic Chemicals Industry, 2022, 54(6): 120-124.
[11]	YAO Haiwei,MAO Rui,WANG Fei,ZHU Zuoqiao. Study on high-value utilization of zinc oxide powder in rotary hearth furnace [J]. Inorganic Chemicals Industry, 2022, 54(12): 119-125.
[12]	HE Ting,KONG Jiao,CUI Jingzhi,CHEN Zhihao,FU Tongtong,GUO Zirui,GU Shuai,YU Jianguo. Study on leaching and thermodynamic of spent lithium-ion batteries with electrochemical reduction [J]. Inorganic Chemicals Industry, 2022, 54(12): 34-43.
[13]	ZHENG Hanxiao,LÜ Li,TANG Shengwei,HE Yanjun,ZHANG Tao. Leaching behavior of phosphate ore in phosphoric acid [J]. Inorganic Chemicals Industry, 2022, 54(10): 96-101.
[14]	ZHOU Jiaqi,CHEN Kui,WU Bin,JI Lijun,WU Yanyang. Study on kinetics of phosphate tailings calcination and acid leaching process [J]. Inorganic Chemicals Industry, 2022, 54(1): 77-82.
[15]	Liu Zhiguo,Zhang Na,Chen Chuan,Xu Xianzhen. Study on thermodynamic model of vapor-liquid equilibrium of electrolyte system [J]. Inorganic Chemicals Industry, 2021, 53(8): 55-59.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on thermal decomposition behavior of Tibetan Kamado microcrystalline magnesite

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 10

References 12

Related Articles 15

Metrics

Comments

Recommended 0