添加硫酸铝钾煅烧对脱硫石膏制备建筑石膏性能的影响

doi:10.19964/j.issn.1006-4990.2023-0314

Abstract

Abstract:

To solve the problem of low utilization rate of flue gas desulphurization gypsum（FGD gypsum） and improve its added-value utilization，calcined gypsum was prepared by calcining FGD gypsum added with potassium aluminum sulfate（KAS，mass ratio of 0，0.3%，0.6%，1.0%） at atmospheric pressure.The effects of calcination temperature and KAS content on the properties and the morphology of calcined gypsum were mainly studied.The results showed that the proper calcination temperature could improve the properties of calcined gypsum.However，excessive temperature could generate more cracks on the surface of calcined gypsum，and the properties were subsequently decreased.The addition of appropriate amount of KAS not only improved the crystallinity of calcined gypsum，but also promoted the growth of new phase dihydrate gypsum（DH） along the b-axis after hydration，delayed the growth along the c-axis，and significantly reduced the length-diameter ratio of DH crystals，which could promote the densification of gypsum sclerotium，resulting in the increase of strength.As 0.3% KAS was added into FGD gypsum and calcined at 170 ℃ for 2 h，the performance of the prepared calcined gypsum was the best.The initial and final setting time was 11.5 min and 14 min，respectively，the 2 h flexural and compressive strength were 3.40 MPa and 9.23 MPa，respectively，and the dried flexural and compressive strengths were 6.70 MPa and 21.82 MPa，respectively，which met the 3.0 grade requirements of the GB/T 9776—2022 “Calcined Gypsum”.Compared with the blank group，the 2 h flexural strength was increased by 26% and the 2 h compressive strength was increased by 40%.

Key words: FGD gypsum, calcined gypsum, potassium aluminum sulfate, calcination

CLC Number:

TQ177.3

WANG Shengchang, HAO Jianying, CHEN Jianing, TIAN Bo. Effect of calcination on properties of calcined gypsum prepared from desulphurization gypsum with potassium aluminum sulfate[J]. Inorganic Chemicals Industry, 2024, 56(4): 105-111.

Figures/Tables 7

Table 1

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

References 25

1	MAITI S， JAIN N， MALIK J. A comprehensive review of flue gas desulphurized gypsum：Production，properties，and applications［J］. Construction and Building Materials， 2023， 393：131918. doi: 10.1016/j.conbuildmat.2023.131918
2	项飞鹏，陈锡炯，刘春红，等. 火电脱硫石膏资源化利用研究进展［J］. 新型建筑材料， 2021， 48（6）：25-30.
	XIANG Feipeng， CHEN Xijiong， LIU Chunhong， et al. Research status on resource utilization of power plant desulfurization gyps-um［J］. New Building Materials， 2021， 48（6）：25-30.
3	刘显丽. 燃煤电厂脱硫石膏的产生及综合利用［J］. 化工设计通讯， 2022， 48（6）：152-154.
	LIU Xianli. Production and comprehensive utilization of desulfurization gypsum in coal-fired powerplant［J］. Chemical Engineering Design Communications， 2022， 48（6）：152-154.
4	CHEN Gaoxiang， LIU Ruicun， SONG Chun， et al. Preparation of hemihydrate gypsum with controllable morphology in glycerol-NaCl-water solutions with maleic acid［J］. Journal of Crystal Growth， 2021， 576：126360. doi: 10.1016/j.jcrysgro.2021.126360
5	罗纯仁，王靖宇，陈成，等. 脱硫石膏产业化综合利用现状和分析［J］. 煤炭加工与综合利用， 2023（3）：88-93.
	LUO Chunren， WANG Jingyu， CHEN Cheng， et al. Present situation and analysis of comprehensive utilization of desulfurization gypsum industrialization［J］. Coal Processing & Comprehensive Utilization， 2023（3）：88-93.
6	何志敏. 琥珀酸钠对常压水热法制备α-半水石膏的影响［J］. 贵州师范大学学报（自然科学版）， 2022， 40（3）：96-101.
	HE Zhimin. Effect of sodium succinate on preparation of α-hemihydrate gypsum by atmospheric hydrothermal method［J］. Journal of Guizhou Normal University（Natural Sciences）， 2022， 40（3）：96-101.
7	陈平，田宇，胡成. 盐溶液种类和浓度对α-半水脱硫石膏合成的影响［J］. 无机盐工业， 2020， 52（10）：130-134.
	CHEN Ping， TIAN Yu， HU Cheng. Effect of type and concentration of salt solution on synthesis of α-semi-water desulfurization gypsum［J］. Inorganic Chemicals Industry， 2020， 52（10）：130-134.
8	HAO Jianying， CHENG Guanji， HU Tao， et al. Preparation of high-performance building gypsum by calcining FGD gypsum adding CaO as crystal modifier［J］. Construction and Building Materials， 2021， 306：124910. doi: 10.1016/j.conbuildmat.2021.124910
9	高子栋，展琳琳. 浅谈我国脱硫石膏环保资源化综合利用现状［J］. 砖瓦， 2022（6）：44-46，49.
	GAO Zidong， ZHAN Linlin. Current situation of comprehensive utilization of desulfurization gypsum environmental protection resour-ces［J］. Brick-Tile， 2022（6）：44-46，49.
10	江瀚宁，李玉平，王志云，等. 硫酸铝草酸钾及其共混物对α-半水石膏制备及性能的影响［J］. 无机盐工业， 2022， 54（10）：121-126.
	JIANG Hanning， LI Yuping， WANG Zhiyun， et al. Effects of potassium oxalate and aluminum sulfate and their compounds on preparation and properties of α-hemihydrate gypsum［J］. Inorganic Chemicals Industry， 2022， 54（10）：121-126.
11	FAN Hao， SONG Xingfu， LIU Tianjie， et al. Effect of Al³⁺ on crystal morphology and size of calcium sulfate hemihydrate：Experimental and molecular dynamics simulation study［J］. Journal of Crystal Growth， 2018， 495：29-36. doi: 10.1016/j.jcrysgro.2018.05.013
12	LIU Dongmei， WANG Qing， XU Gang， et al. Effect of modifiers on crystalizing habit and mechanical strength of α-hemihydrate gypsum prepared from PG by an autoclaved method［J］. Construction and Building Materials， 2023，366：130114.
13	胡成，向玮衡，陈平，等. 丁二酸对水热合成α-半水脱硫石膏微晶形貌及力学强度的影响［J］. 无机盐工业， 2021， 53（4）：76-80.
	HU Cheng， XIANG Weiheng， CHEN Ping， et al. Effects of succinic acid on crystallite morphology and mechanical strength of α-hemihydrate desulfurized gypsum synthesized by hydrothermal method［J］. Inorganic Chemicals Industry， 2021， 53（4）：76-80.
14	YIN Shishi， YANG Liuchun. α or β-hemihydrates transformed from dihydrate calcium sulfate in a salt-mediated glycerol-water solution［J］. Journal of Crystal Growth， 2020，550：125885.
15	刘志刚，霍超，杨立荣，等. 利用亚硫酸钙型脱硫石膏制备胶凝材料的研究［J］. 非金属矿， 2015， 38（1）：35-37，41.
	LIU Zhigang， HUO Chao， YANG Lirong， et al. Preparation of gypsum-based cementing material using calcium sulfite desulfurization gypsum［J］. Non-Metallic Mines， 2015， 38（1）：35-37，41.
16	张康. 改性剂—煅烧联合改性湿氟石膏制备建筑石膏粉的研究［D］. 长沙：中南大学， 2013.
	ZHANG Kang. Water-saturated fluorgypsum modification with modifiers for building gypsum powder under calcination［D］. Changsha： Central South University， 2013.
17	黎涛，于亮，宋文吉，等. 烟气脱硫石膏粉化学物相分析［J］. 冶金分析， 2013， 33（2）：28-32.
	LI Tao， YU Liang， SONG Wenji， et al. Chemical phase analysis of flue gas desulfurization gypsum powder［J］. Metallurgical Analysis， 2013， 33（2）：28-32.
18	赵华，廖洪强，宋慧平，等. 热失重实验法研究脱硫石膏的脱水特性［J］. 新型建筑材料， 2017， 44（10）：24-27.
	ZHAO Hua， LIAO Hongqiang， SONG Huiping， et al. Study on dehydration characteristics of desulfurization gypsum by thermal loss gravimetric method［J］. New Building Materials， 2017， 44（10）：24-27.
19	续荣贵，汪永和，冯春花. 脱硫石膏用作建筑石膏的处理工艺研究［J］. 江苏建筑， 2013（3）：102-105.
	XU Ronggui， WANG Yonghe， FENG Chunhua. Study on the building gypsum preparation through the treatment of desulfurization gypsum［J］. Jiangsu Construction， 2013（3）：102-105.
20	王飞，汪澜，刘姚君，等. 煅烧制度对脱硫石膏物理性能的影响研究［J］. 科学技术与工程， 2014， 14（16）：170-174.
	WANG Fei， WANG Lan， LIU Yaojun， et al. Study on the effects of calcined system on physical performance of desulphurization gypsum［J］. Science Technology and Engineering， 2014， 14（16）：170-174.
21	高淑娟. 煅烧对脱硫石膏性能的影响［J］. 四川建材， 2016， 42（6）：19-20.
	GAO Shujuan. Effect of calcination on properties of desulfurized gypsum［J］. Sichuan Building Materials， 2016， 42（6）：19-20.
22	李强，尚超，石棕文，等. 金属离子对硫酸钙晶须形貌影响的试验研究［J］. 非金属矿， 2019， 42（1）：94-96.
	LI Qiang， SHANG Chao， SHI Zongwen， et al. Experimental study on the effect of metal ions on the morphology of calcium sulfate whiskers［J］. Non-Metallic Mines， 2019， 42（1）：94-96.
23	陈曲仙. 氟铝杂质离子和有机酸添加剂对脱硫石膏结晶过程的影响实验研究［D］. 湘潭：湘潭大学， 2014.
	CHEN Quxian. Experimental research on the effects of F- and Al3+ ions impuritis and organic additives on crystallization of desulfurization gypsum［D］. Xiangtan： Xiangtan University， 2014.
24	杨新亚，喻德高，王锦华. 硫酸钾对无水硫酸钙水化激发机理研究［J］. 沈阳建筑大学学报（自然科学版）， 2008， 24（1）：104-107.
	YANG Xinya， YU Degao， WANG Jinhua. Research on hydration mechanism of calcium sulfate anhydrite activated by potassium sulfate［J］. Journal of Shenyang Jianzhu University（Natural Science）， 2008， 24（1）：104-107.
25	RASHADM M， MAHMOUDM H H， IBRAHIMI A， et al. Crystallization of calcium sulfate dihydrate under simulated conditions of phosphoric acid production in the presence of aluminum and magnesium ions［J］. Journal of Crystal Growth， 2004， 267（1/2）：372-379. doi: 10.1016/j.jcrysgro.2004.03.060

[1]	QIAN Zhihui, ZHU Qin, MA Jiao, GUO Yujiao, XIANG Mingwu, GUO Junming. Study on preparation and electrochemical properties of nano-sized LiNi_0.05Mn_1.95O₄ cathode materials [J]. Inorganic Chemicals Industry, 2024, 56(4): 50-56.
[2]	YANG Kun, REN Qixia, DONG Yonggang, LIU Fei, YAO Mengqin, CAO Jianxin. Effect of calcination temperature on catalytic performance of ZnGaZrO _x /SAPO-34 [J]. Inorganic Chemicals Industry, 2024, 56(2): 136-145.
[3]	LI Qiang, YOU Xiaomin, SHE Xuefeng, JIANG Zeyi, XUE Qingguo, WANG Jingsong. Effect of calcination temperature and carbon structure on compressive strength of CaO-containing carbon pellets [J]. Inorganic Chemicals Industry, 2023, 55(9): 43-49.
[4]	LI Heng, ZHANG Hui, ZI Xuemin. Analysis on calcination process progress of phosphogypsum [J]. Inorganic Chemicals Industry, 2023, 55(6): 27-35.
[5]	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.
[6]	GUO Shuang, XING Dongxian, GUO Xiao, JI Xiaojie, TANG Jianwei, HUA Quanxian, WANG Baoming, LIU Yong. Study on preparation and modification of phosphogypsum-based architectural gypsum [J]. Inorganic Chemicals Industry, 2023, 55(12): 102-110.
[7]	DU Guanggang, HE Tong, XU Zehui, LIU Lei. Study on properties of calcium oxide in SCA under different calcination conditions [J]. Inorganic Chemicals Industry, 2023, 55(10): 35-41.
[8]	GU Qingshan,LIN Xihua,Zhao Shihao,YUAN Yijin. Effect of different pretreatment processes on properties of phosphogypsum [J]. Inorganic Chemicals Industry, 2022, 54(4): 17-23.
[9]	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.
[10]	ZHANG Jiulei,ZHAO Liang,DONG Hui,WANG Dexi. Study on the thermal process and calcination gas flow rate of light-burned magnesia entrained-flow calciner [J]. Inorganic Chemicals Industry, 2022, 54(1): 96-100.
[11]	Qin Ganghua,Chen Biao,Feng Xiangdong,Chen Hui,Sun Qing,Zhang Jian,Sheng Jiawei. Research on dechlorination from dry ash of coal-fired power plants [J]. Inorganic Chemicals Industry, 2021, 53(10): 104-107.
[12]	Ma Yuwen,Kong Dexu,Wang Fei. Study on calcination of nickel sulfate [J]. Inorganic Chemicals Industry, 2020, 52(9): 32-33.
[13]	Bian Chengli,Shi Huangang,Bao Wenyun,Zhang Dongping. Heat treatment of FGD gypsum and preparation of molds for slip casting [J]. Inorganic Chemicals Industry, 2020, 52(2): 54-57.
[14]	Gao Zengli,Li Qiuhong,Li Huaquan,Bi Hongyu. A new device for utilizing waste heat from calcination tail gas of titanium dioxide rotary kiln [J]. Inorganic Chemicals Industry, 2020, 52(2): 75-77.
[15]	RONG 尔Yi, ZHU Jia-Wen, CHEN Kui, YAO Heng-Ping, ZHOU Xiao-Kui. Effects of calcining seed，phosphate，and magnesium on titanium dioxide crystal [J]. INORGANICCHEMICALSINDUSTRY, 2016, 48(7): 21-.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Effect of calcination on properties of calcined gypsum prepared from desulphurization gypsum with potassium aluminum sulfate

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 7

References 25

Related Articles 15

Metrics

Comments

Recommended 0