磷石膏提质降杂实验研究

doi:10.19964/j.issn.1006-4990.2020-0397

Abstract

Abstract:

The comprehensive utilization of phosphogypsum has important implications for protecting the environment and pro-moting the sustainable development of enterprises.Phosphogypsum utilization is affected by impurities such as phosphorus,fluorine and silicon dioxide in phosphogypsum.In order to solve the problem of high silicon dioxide content in phosphogypsum from Yunnan,the experimental study on improving quality and reducing impurity of phosphogypsum was carried out by using direct flotation process.Through the single factor condition test,the suitable process conditions were as following: the flotation temperature was 15 ℃,pH of pulp was 2.0,dodecylamine was as the collector with a dosage of 300 g/t.By adopting the opencircuit flotation flowsheet of one-stage roughing and two-stage cleaning,a concentrate product containing 97.50% of CaSO₄·2H₂O and 1.17% of SiO₂ was obtained,and it reached the first grade requirements of the national standard GB/T 23456—2018 pho-sphogypsum.The recovery of CaSO₄·2H₂O and removal of SiO₂ were 98.58% and 92.23% respectively.The effective separation of CaSO₄·2H₂O and SiO₂ was successfully achieved by direct flotation.Simultaneously,the water-soluble phosphorus and the water-soluble fluorine in phosphogypsum were also effectively removed.Thus the quality of phosphogypsum was improved.

Key words: phosphogypsum, direct flotation, calcium sulfate dehydrate, silica

CLC Number:

TQ126.35

Zhang Lizhen,Lü Zihu,Zhang Yongxing,Wu Zhaoyang,Zhang Xiufeng,Tan Xiumin. Experimental study on improving quality and reducing impurity of phosphogypsum[J]. Inorganic Chemicals Industry, 2021, 53(6): 171-173.

Figures/Tables 8

Table 1

Fig.1

Fig.2

Fig.3

Fig.4

Table 2

Fig.5

Table 3

化学成分	质量分数/%	化学成分	质量分数/%
CaO	28.19	K₂O	0.27
SO₃	36.42	Na₂O	0.081
SiO₂	12.03	总P₂O₅	0.92
Al₂O₃	0.74	水溶性P₂O₅	0.33
Fe₂O₃	0.14	总F	0.32
MgO	0.062	水溶性F	0.25

产品名称	产率/ %	石膏品位/%		石膏回收率/%
产品名称	产率/ %	SiO₂	CaSO₄·2H₂O	SiO₂	CaSO₄·2H₂O
精矿	85.45	1.17	97.50	7.77	98.58
中矿2	0.72	46.68	43.70	2.60	0.37
中矿1	1.92	71.20	20.66	10.62	0.47
尾矿	11.91	85.36	6.24	79.00	0.88
合计	100.00	12.87	84.77	100.00	100.00

项目		w（CaSO₄· 2H₂O,干基）/%	w（水溶性P₂O₅, 干基）/%	w（水溶性F^-,干基）/%	w（水溶性MgO, 干基）/%	w（水溶性Na₂O, 干基）/%	w（Cl^-, 干基）/ %
国标	一级	≥90	≤0.20	≤0.10	≤0.10	≤0.06	≤0.02
国标	二级	≥80	≤0.30	≤0.20	≤0.30	≤0.10	≤0.04
精矿产品		97.5	0.08	0.02	0.024	0.009	0.000 2

[1]	马高飞, 杨培发. 磷石膏综合处理途径分析[J]. 化肥设计, 2018,56(3):42-45.
[2]	叶学东. 2018年我国磷石膏利用现状、问题及建议[J]. 磷肥与复肥, 2019,34(7):1-4.
[3]	张茹, 李艳军, 刘杰, 等. 磷石膏的综合利用及有害元素处理方法[J]. 矿产保护与利用, 2015(2):50-54.
[4]	白有仙, 詹骏, 朱云勤. 高品质磷石膏处理工艺研究[J]. 无机盐工业, 2008,40(5):45-47.
[5]	张利珍, 张永兴, 张秀峰, 等. 中国磷石膏资源化综合利用研究进展[J]. 矿产保护与利用, 2019,39(4):14-18,92.
[6]	肖洪贵. 云南云天化股份有限公司磷石膏综合利用现状分析[J]. 磷肥与复肥, 2019,34(7):35-37.
[7]	钱文敏, 唐芬, 许中俊, 等. 云南磷石膏综合利用现状及次生环境问题[J]. 环境科学导刊, 2015,34(1):58-60.

[1]	LENG Manxi, ZHU Yu, YAN Jikang, XIE Ke, ZOU Yongjie. Study on crystallization characteristics and mineral flotation performance of industrial waste phosphogypsum [J]. Inorganic Chemicals Industry, 2025, 57(3): 108-115.
[2]	MA Mingyang, CHEN Minyi, SUN Tao, XUE Bin. Study on preparation and oil/water separation performance of silica-mediated superhydrophobic/superoleophilic hybrid sponge [J]. Inorganic Chemicals Industry, 2025, 57(3): 64-70.
[3]	TAN Shanyi, WEN Huizi, HE Shuyu, ZHANG Liwen, CHEN Shaohua, XI Benjun. Study on leaching behavior and kinetics of phosphorus from phosphogypsum [J]. Inorganic Chemicals Industry, 2025, 57(2): 105-112.
[4]	SHEN Xiaoqian, ZHOU Fei, LIU Wanchen, XU Lu, WU Junshu. Study on synthesis of FeS modified calcium silicate hydrate composites and their total Cr removal performance [J]. Inorganic Chemicals Industry, 2025, 57(2): 57-67.
[5]	ZHU Jicheng, YANG Qixin, LIANG Haoquan, WANG Zengkun, OUYANG Fugui, DI Jing, GAI Xikun. Effect of confined catalyst Ni@S2 on performance of methane dry reforming reaction [J]. Inorganic Chemicals Industry, 2025, 57(2): 138-146.
[6]	TANG Kaijing, LIU Chuanbei, LI Yingding, JIANG Yong, WU Junnan, ZHANG Tao. Research on preparation and mechanism of superhydrophobic phosphogypsum products [J]. Inorganic Chemicals Industry, 2025, 57(1): 97-102.
[7]	LI Shuai, LI Tianxiang, ZHU Jing, LIU Songlin. Study on purification process of sodium fluoride [J]. Inorganic Chemicals Industry, 2024, 56(9): 90-97.
[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]	SUN Lan, CHEN Shiying, YANG Liuxu, NIU Yiming, ZHAO Aonan. Basic study on fixing soluble phosphorus in phosphogypsum with magnesium slag [J]. Inorganic Chemicals Industry, 2024, 56(8): 92-98.
[10]	HU Cheng, LIU Meng, XIANG Weiheng, CHEN Ping, WANG Neng, LU Guanju, ZHOU Jinlan. Preparation of α-hemihydrous gypsum from CaCl₂ and MgCl₂ and their composite solution [J]. Inorganic Chemicals Industry, 2024, 56(7): 112-117.
[11]	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.
[12]	LEI Xinyu, SUN Henghui, YUAN Xinqiang, ZHANG Wei, JIANG Peng, ZHANG Lizhai. Study on preparation of core-shell structure VO₂（M）@SiO₂ by silica sol-gel coating [J]. Inorganic Chemicals Industry, 2024, 56(6): 46-54.
[13]	HU Cheng, LIU Meng, XIANG Weiheng, DUAN Pengxuan, LI Shunkai, MING Yang, WANG Neng, LU Guanju. Effect of NaCl solution concentration on transcrystallization behavior of α-hemihydrate gypsum from phosphogypsum [J]. Inorganic Chemicals Industry, 2024, 56(6): 87-93.
[14]	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.
[15]	WANG Mingshun, AO Xianquan, YUAN Xing, DONG Wenyan, CHEN Qianlin. Study on effect of crystallizer on preparation of anhydrous calcium sulfate from phosphogypsum [J]. Inorganic Chemicals Industry, 2024, 56(5): 101-107.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Experimental study on improving quality and reducing impurity of phosphogypsum

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 8

References 7

Related Articles 15

Metrics

Comments

Recommended 0