吉兰泰盐湖尾矿生产液体盐中试工艺研究

doi:10.19964/j.issn.1006-4990.2022-0183

摘要/Abstract

摘要：

以吉兰泰南线船采二层盐为原料,用氨碱废液和淡水混配后溶采反应脱除硫酸根并生产纯碱用液体盐。采用中试研究优化工艺条件,在中试最佳工艺条件的基础上,确定了聚丙烯酰胺对二水硫酸钙沉降效果的影响。中试研究结果表明最佳工艺条件为:洗渣工序氨碱废液与淡水的体积比为1∶9、洗渣停留时间为2.5 h、制卤停留时间为3 h,反应罐二级脱硫工序n（硫酸根）∶n（钙离子）为1∶0.75、停留时间为5 min。二次沉降过程中聚丙烯酰胺的添加量为62.5 mg/L时,二水硫酸钙的沉降效果较好,液体盐透光率≥80%。优化工艺条件下可达到企业制碱用液体盐标准,其中钙离子的质量浓度≤2 g/L、硫酸根的质量浓度≤5 g/L、氯化钠的质量浓度≥305 g/L,同时采用该工艺能够实现资源综合利用。

关键词: 吉兰泰, 液体盐, 盐湖尾矿, 高效利用

Abstract:

Taking the second layer salt from the ship of Jilantai south line as the raw material,the ammonia alkali waste liquid and fresh water were mixed and then the solution extraction reaction was used to remove sulfate radical and produce liquid salt for soda ash.Pilot scale research was used to optimize the process conditions.On the basis of the optimum process conditions of pilot test,the influence of polyacrylamide on the sedimentation effect of calcium sulfate dihydrate was determined.The results of pilot study showed that the volume ratio of ammonia alkali waste liquid to fresh water in the slag washing process was 1∶9,the residence time of slag washing was 2.5 h,the residence time of brine making was 3 h,the optimal n（sulfate）∶n（calcium ion） for the secondary desulfurization of the reaction tank was 1∶0.75,and the residence time of the secondary desulfurization of the reaction tank was 5 min.When the amount of polyacrylamide added in the secondary sedimentation process was 62.5 mg/L,the sedimentation effect of calcium sulfate dihydrate was better,and the light transmittance of liquid salt was≥80%.Under the optimized process conditions,the liquid salt standard for enterprise soda production could be reached,in which the mass concentration of calcium ion was ≤2 g/L,the mass concentration of sulfate radical was≤5 g/L,and the mass concentration of sodium chloride was≥305 g/L.at the same time,the comprehensive utilization of resources could be realized by using this process.

Key words: Jilantai, liquid salt, salt lake tailing, comprehensive utilization

中图分类号:

TD926.4

孙志城,杜威,王润璞,程鹏高,张荣,高卫星,王占和,胡开宝,唐娜. 吉兰泰盐湖尾矿生产液体盐中试工艺研究[J]. 无机盐工业, 2022, 54(10): 46-52.

SUN Zhicheng,DU Wei,WANG Runpu,CHENG Penggao,ZHANG Rong,GAO Weixing,WANG Zhanhe,HU Kaibao,TANG Na. Study on pilot scale process of producing liquid salt from Jilantai salt lake tailings[J]. Inorganic Chemicals Industry, 2022, 54(10): 46-52.

图/表 17

表1

表2

图1

表3

图2

表4

图3

表5

表6

图4

表7

表8

表9

表10

表11

表12

图5

参考文献 16

[1]	李育童, 咏梅.吉兰泰盐湖采盐技术变迁[J].内蒙古师范大学学报:自然科学版, 2021, 50(3): 261-267.
	LI Yutong, YONG Mei.Transition of mining technology in Jilantai salt lake[J].Journal of Inner Mongolia Normal University:Natural Science Edition, 2021, 50(3): 261-267.
[2]	史星星, 胡开宝, 王占和, 等. 吉兰泰盐湖卤水冻硝及冻硝母液蒸发析盐规律研究[J].无机盐工业, 2020, 52(6): 54-58.
	SHI Xingxing, HU Kaibao, WANG Zhanhe, et al.Study on salt crystallization law of brine frozen mirabilite and frozen mirabilite mother liquor evaporation in Jilantai salt lake[J].Inorganic Che-Industry micals, 2020, 52(6): 54-58.
[3]	胡开宝, 崔金贵, 张荣, 等. 吉兰泰盐湖资源开采与创新发展[J].盐科学与化工, 2018(3): 40-43.
	HU Kaibao, CUI Jingui, ZHANG Rong, et al.Resources exploitation and innovation development of Jilantai salt lake[J].Journal of Salt Science and Chemical Industry, 2018(3): 40-43.
[4]	程芳琴, 成怀刚, 崔香梅.中国盐湖资源的开发历程及现状[J].无机盐工业, 2011, 43(7): 1-4, 12.
	CHENG Fangqin, CHENG Huaigang, CUI Xiangmei.Development history and present status of salt lake resources in China[J].Inorganic Chemicals Industry, 2011, 43(7): 1-4, 12.
[5]	刘海宁, 叶秀深, 张慧芳, 等. 盐湖稀有元素吸附分离提取研究[J].盐湖研究, 2019, 27(3): 11-20.
	LIU Haining, YE Xiushen, ZHANG Huifang, et al.Separation and extraction of rare elements in salt lake brine[J].Journal of Salt Lake Research, 2019, 27(3): 11-20.
[6]	胡开宝.吉兰泰盐湖资源开采与创新发展[J].中国盐业, 2020(1): 51-54.
	HU Kaibao.Exploitation and innovative development of Jilantai salt lake resources[J].China Salt Industry, 2020(1): 51-54.
[7]	王润璞, 杜威, 胡开宝, 等. 氨碱废液溶采二层盐制备优级液体盐工艺研究[J].无机盐工业, 2021, 53(8): 83-86.
	WANG Runpu, DU Wei, HU Kaibao, et al.Study on the process of preparing liquid salt of guaranteed reagent by dissolving two-layer salt in ammonia-alkali wastewater[J].Inorganic Chemicals Industry, 2021, 53(8): 83-86.
[8]	高卫星, 赵春刚, 张玮, 等. 吉兰太盐湖贫瘠矿床资源新工艺的实践与应用[J].盐科学与化工, 2017, 46(7): 42-44.
	GAO Weixing, ZHAO Chungang, ZHANG Wei, et al.Practice and application of new technology and resource exploration in Jilantai salt lake deposit ore[J].Journal of Salt Science and Chemical Industry, 2017, 46(7): 42-44.
[9]	宋信信, 熊泽华, 邓强, 等. 利用氨碱废液生产液体盐的新型工艺[J].盐科学与化工, 2020, 49(11): 8-10.
	SONG Xinxin, XIONG Zehua, DENG Qiang, et al.A new technology of producing liquid salt using waste ammonia liquid from ammonia soda[J].Journal of Salt Science and Chemical Industry, 2020, 49(11): 8-10.
[10]	崔玉虎.硫酸钠型盐矿卤水脱硫的研究[J].苏盐科技, 2012(4): 1-3.
	CUI Yuhu.Study on desulphurization of brine of sodium sulfate type salt mine[J].Jiangsu Salt Science ＆ Technology, 2012(4): 1-3.
[11]	ZHAO Chuanliang, ZHOU Junyuan, YAN Yi, et al.Application of coagulation/flocculation in oily wastewater treatment:A revi-ew[J].Science of the Total Environment, 2021,765.Doi:10.1016/j.scitotenv.2020.142795.
[12]	TIKHONOV A Y, MYASNIKOV S K, KULOV N N.Kinetics of nucleation and growth of calcium carbonate and calcium sulphate crystals from aqueous solutions[J].Theoretical Foundations of Chemical Engineering, 2020, 54(4): 529-538.
[13]	王少青.吉兰泰盐湖卤水除杂及副产超细氢氧化镁工艺[D].呼和浩特:内蒙古工业大学, 2007.
	WANG Shaoqing.Removal of impurities from brine of Jilantai salt lake and preparation process of ultrafine magnesium hydroxide powder as a byproduct[D].Hohhot:Inner Mongolia University of Tehchnology, 2007.
[14]	朱明丽, 李俊杰, 曹正伟, 等. 纯碱行业卤水中硫酸根的脱除[J].无机盐工业, 2016, 48(11): 57-61.
	ZHU Mingli, LI Junjie, CAO Zhengwei, et al.Removal of sulfate radical from brine in soda industry[J].Inorganic Chemicals Industry, 2016, 48(11): 57-61.
[15]	颜亚盟, 任青考.不同温度下硫酸钙在盐水中的沉降速率实验研究[J].盐科学与化工, 2018, 47(6): 24-27.
	YAN Yameng, REN Qingkao.Study on settlement rate of calcium sulfate in brine at different temperature[J].Journal of Salt Science and Chemical Industry, 2018, 47(6): 24-27.
[16]	FELDMANN T, DEMOPOULOS G P.Influence of impurities on crystallization kinetics of calcium sulfate dihydrate and hemihydrate in strong HCl-CaCl₂ solutions[J].Industrial & Engineering Chemistry Research, 2013, 52(19): 6540-6549.

实验编号	V（氨碱废液）∶ V（淡水）	液相离子质量浓度/（g?L^-1）					相对密度
实验编号	V（氨碱废液）∶ V（淡水）	Cl^-	Ca²⁺	Mg²⁺	SO₄^2-	NaCl	相对密度
1	1∶3	113.30	10.21	0.12	1.32	158.01	1.11
2	1∶3	119.32	10.62	0.06	0.83	196.70	1.12
3	1∶3	118.45	8.80	0.17	1.08	170.08	1.11
4	1∶4	126.06	7.12	0.12	1.81	133.60	1.12
5	1∶4	105.41	7.80	0.10	3.77	173.77	1.12
6	1∶4	110.72	7.05	0.23	3.51	182.53	1.12
7	1∶7	123.45	3.84	0.09	1.52	193.74	1.13
8	1∶7	105.50	3.63	0.04	1.86	173.92	1.11
9	1∶7	89.98	4.06	0.07	1.81	138.32	1.10
10	1∶9	140.40	3.06	0.10	3.57	231.36	1.12
11	1∶9	110.56	3.67	0.09	1.66	188.09	1.11
12	1∶9	113.02	3.43	0.05	2.30	186.24	1.11

盐渣		清洗后盐渣组成分析
盐渣		w（Cl^-）	w（Ca²⁺）	w（Mg²⁺）	w（SO₄^2-）	w（CaSO₄）	w（MgSO₄）	w（Na₂SO₄）	w（NaCl）
过程随机取样	盐渣1	4.19	2.07	0.007 6	5.14	7.03	0.038	0.22	6.91
	盐渣2	1.77	3.81	0.015	9.26	12.94	0.074	0.10	2.92
	盐渣3	2.47	3.78	0.012	9.80	12.84	0.059	1.02	4.07

实验编号	V（氨碱废液）∶ V（淡水）	液相离子质量浓度/（g?L^-1）
实验编号	V（氨碱废液）∶ V（淡水）	Cl^-	Ca²⁺	Mg²⁺	SO₄^2-	NaCl
1	1∶3	187.57	5.61	0.19	1.91	309.20
2	1∶3	191.26	3.78	0.21	2.78	315.28
3	1∶3	192.34	5.51	0.56	1.22	317.07
4	1∶4	188.44	4.59	0.12	1.08	310.62
5	1∶4	190.17	2.69	0.16	3.38	308.97
6	1∶4	192.57	4.19	0.12	1.08	305.94
7	1∶7	190.39	2.04	0.21	4.31	313.74
8	1∶7	193.43	1.76	0.11	3.62	317.61
9	1∶7	190.17	1.74	0.12	3.77	312.42
10	1∶9	193.43	1.57	0.01	3.77	318.88
11	1∶9	191.26	1.25	0.11	3.70	315.29
12	1∶9	193.43	1.49	0.15	4.06	318.72

实验编号	停留时间/h	液相离子质量浓度/（g?L^-1）
实验编号	停留时间/h	Cl^-	Ca²⁺	Mg²⁺	SO₄^2-	NaCl
1	2.5	192.83	3.51	0.16	2.06	309.56
2	2.5	193.27	3.49	0.17	1.81	309.78
3	2.5	191.74	3.37	0.31	1.57	306.67
4	3.0	190.19	1.43	0.16	4.99	313.50
5	3.0	191.26	1.33	0.19	6.85	315.17
6	3.0	190.17	1.25	0.24	6.46	313.50
7	4.0	189.04	0.84	0.19	7.78	311.62
8	4.0	190.12	1.00	0.07	6.61	313.42
9	4.0	192.52	0.80	0.26	8.61	317.25

运行时间/h	相对密度	透光率/ %	液相各离子质量浓度/（g·L^-1）
运行时间/h	相对密度	透光率/ %	Ca²⁺	SO₄^2-	Mg²⁺	Cl^-	NaCl
1	1.19	91.60	0.94	7.34	0.23	190.17	313.38
2	1.19	92.50	0.92	7.83	0.25	189.30	311.95
3	1.19	90.90	0.92	7.78	0.25	173.87	286.52
4	1.19	91.80	0.88	8.86	0.27	188.00	309.80
5	1.19	95.50	0.86	8.66	0.28	188.22	310.17
6	1.19	94.20	0.82	8.56	0.31	189.74	312.67
7	1.19	92.70	0.88	8.22	0.27	188.87	311.24
8	1.19	88.70	1.02	7.58	0.19	191.91	316.25
9	1.19	91.00	1.02	7.58	0.19	191.26	315.29
10	1.19	93.00	0.96	8.07	0.31	189.30	312.07
11	1.19	92.00	1.08	9.05	0.21	191.26	315.29
12	1.19	92.40	1.12	6.36	0.15	190.17	313.50
13	1.19	93.60	1.22	7.49	0.12	187.08	308.40
14	1.19	84.20	0.92	7.34	0.36	189.25	311.98
15	1.19	93.60	0.92	9.30	0.31	189.25	311.98
16	1.19	75.90	0.84	7.83	0.30	189.04	311.62
17	1.19	81.10	0.90	8.47	0.22	188.17	310.19
18	1.19	84.00	0.92	8.81	0.19	189.04	311.62
19	1.19	86.20	0.82	8.81	0.25	185.99	306.60
20	1.19	87.30	0.80	9.05	0.26	189.25	311.98
21	1.19	90.00	0.90	6.56	0.20	187.95	309.83
22	1.19	92.00	0.92	9.05	0.25	190.34	313.78
23	1.19	79.70	0.96	9.98	0.21	188.17	310.20
24	1.19	82.00	0.84	9.30	0.25	189.91	313.07
25	1.19	84.40	0.78	9.79	0.33	171.43	315.57
26	1.19	86.10	1.00	8.66	0.28	190.34	313.66

首页

全国无机盐信息中心

中国化工学会

无机酸碱盐专业委员会