吉兰泰盐湖卤水冻硝及冻硝母液蒸发析盐规律研究

doi:10.11962/1006-4990.2019-0437

Abstract

Abstract:

The brine of Jilantai Salt Lake is aging gradually with the exploitation of salt lake resources for a long time,which leads to the decline of recycled salt quality year by year. In order to solve the problems such as brine aging and SO₄ ^2- enrichment,aiming at the Na ⁺,Mg ²⁺∥Cl ^-,SO₄ ^2--H₂O system in Jilantai Salt Lake,the salt crystallization law of frozen mirabilite of dredging area brine and frozen mirabilite mother liquor evaporation was studied by constant temperature freezing method and forced evaporation constant temperature equilibrium method.The effect of freezing mirabilite temperature,water addition rate and frozen mirabilite time on denitrification rate and SO₄ ^2- removal rate were investigated.And the evaporation rate on the salt crystallization of evaporation was also studied.The optimum condition of freezing mirabilite was as follows：the brine addition rate was 8%（mass fraction）,the brine density decreased to 1.197 8 g/cm ³,freeze for 12 h under -10 ℃,then the brine density was low to 1.186 6 g/cm ³,the mass concentration of SO₄ ^2- in brine decreased to 8.84 g/L and the precipitation rate of mirabilite was 73.76%. After the frozen mirabilite,the brine was evaporated until density of the brine reaching 1.260 1 g/cm ³ under 25 ℃.The precipitation rate and purity of sodium chloride were 93.14% and 96.23%,respectively.This study provides a theoretical basis for the optimization of brine production of high grade recycled salt in ship mining area.

Key words: Jilantai Salt Lake, frozen crystallization law of mirabilite, phase diagram, evaporation-crystallization law

CLC Number:

TS392

Shi Xingxing,Hu Kaibao,Wang Zhanhe,Pan Jingzhong,Cui Jingui,Luo Ruiyin,Du Wei,Tang Na. Study on salt crystallization law of brine frozen mirabilite and frozen mirabilite mother liquor evaporation in Jilantai Salt Lake[J]. Inorganic Chemicals Industry, 2020, 52(6): 54-58.

Figures/Tables 12

References 10

[1]	姜旭, 周保华, 乜贞 . 中国盐湖卤水蒸发实验研究进展[J]. 无机盐工业, 2013,45(6):1-3,32.
[2]	余疆江, 郑绵平, 伍倩 , 等. 西藏杜佳里盐湖湖水的自然蒸发及析盐规律[J]. 化工进展, 2015,34(12):4172-4178.
[3]	安东, 张志宏, 付振海 , 等. 硫酸盐型卤水蒸发过程钾盐镁矾结晶区域研究[J]. 无机盐工业, 2015,47(8):49-52.
[4]	胡开宝, 王占和, 崔金贵 , 等. 浅谈吉兰泰盐湖资源开采与可持续发展研究[J].中国盐业, 2017(17):41-45.
[5]	张荣, 黄发金, 孙玉国 , 等. 湖盐矿床开采自主创新探讨[J]. 盐业与化工, 2012,41(4):37-40.
[6]	胡开宝, 潘存峰, 张荣 . 吉兰泰盐湖资源开采与地质环境问题探讨[J]. 盐业与化工, 2011,40(1):49-51.
[7]	高卫星, 赵春刚, 田广辉 , 等. 提高再生盐回收率的实践应用[J]. 盐业与化工, 2016,45(11):47-49.
[8]	张兆广, 祁燕 . 察尔汗盐湖低品位卤水自然蒸发试验研究[J].盐湖研究, 2006(1):17-23.
[9]	刘建卫 . 雅布赖盐湖卤水再生盐及芒硝析出规律研究[D]. 天津:天津科技大学, 2014.
[10]	赵建国, 华欣欣, 刘建卫 , 等. 雅布赖盐湖再生盐母液析硝规律研究[J]. 盐科学与化工, 2017,46(7):18-21.

密度/ （g·cm^-3）	pH	液相离子质量浓度/（g·L^-1）
密度/ （g·cm^-3）	pH	Na⁺	Cl^-	Ca²⁺	SO₄^2-	Mg²⁺
1.216 6	8.35	103.70	177.11	0.36	38.88	15.51

编号	冷冻时间/h	液相离子质量浓度/（g·L^-1）				冻硝母液密度/（g·cm^-3）	固相离子质量分数/%				芒硝析出率/%	析出固相
编号	冷冻时间/h	Cl^-	Na⁺	Mg²⁺	SO₄^2-	冻硝母液密度/（g·cm^-3）	Cl^-	Na⁺	Mg²⁺	SO₄^2-	芒硝析出率/%	析出固相
1	12	181.03	89.24	16.87	9.80	1.192 8	34.96	36.45	1.32	27.06	74.79	NaCl·2H₂O+ Mir（芒硝）
2	24	179.30	88.44	17.06	9.75	1.194 6	36.08	34.35	1.25	28.17	74.92
3	48	180.58	88.84	17.21	9.73	1.192 9	36.14	33.85	1.50	28.26	74.97
4	72	177.94	87.30	17.03	9.15	1.196 9	35.75	34.11	1.42	28.64	76.47
5	96	178.75	88.06	17.33	9.19	1.196 2	36.70	33.48	1.86	27.84	76.36

温度/ ℃	序号	加水率/%	原料卤水密度/ （g·cm^-3）	液相离子质量浓度/（g·L^-1）				冻硝母液密度/ （g·cm^-3）
温度/ ℃	序号	加水率/%	原料卤水密度/ （g·cm^-3）	Cl^-	Na⁺	Mg²⁺	SO₄^2-	冻硝母液密度/ （g·cm^-3）
-5	1	0	1.216 6	183.52	91.60	16.94	10.25	1.203 4
	2	5	1.206 7	178.31	90.57	15.68	10.19	1.202 6
	3	8	1.198 8	174.08	88.66	15.21	10.03	1.185 4
	4	10	1.194 0	169.85	86.74	14.73	9.86	1.182 6
	5	15	1.183 3	158.70	81.05	13.82	9.42	1.179 0
	6	20	1.179 3	151.09	77.27	13.14	9.20	1.168 8
	7	25	1.174 0	143.54	73.75	12.51	9.55	1.159 2
-10	1	0	1.216 6	181.03	89.24	16.87	9.80	1.196 9
	2	5	1.207 0	177.09	89.14	15.43	9.22	1.195 8
	3	8	1.197 8	171.03	87.20	14.87	8.84	1.186 6
	4	10	1.193 8	167.72	85.07	14.46	8.65	1.182 2
	5	15	1.183 8	156.89	79.10	14.12	8.46	1.172 6
	6	20	1.177 0	149.17	75.24	13.19	8.40	1.162 4
	7	25	1.168 5	140.44	71.59	12.21	8.39	1.158 3
	8	35	1.161 9	128.23	65.41	11.18	7.69	1.142 0
	9	45	1.143 8	118.03	59.32	10.70	6.88	1.137 6
-15	1	0	1.216 6	175.53	84.01	17.45	7.55	1.192 4
	2	5	1.206 0	173.79	86.03	15.84	7.50	1.190 1
	3	8	1.198 3	167.63	84.19	14.68	7.40	1.190 8
	4	10	1.196 7	163.04	81.65	14.49	7.55	1.182 9
	5	15	1.184 0	162.12	81.08	14.43	7.36	1.172 3
	6	20	1.181 9	150.09	75.28	13.27	6.97	1.165 5
	7	25	1.172 1	141.45	71.03	12.52	6.83	1.157 5
	8	30	1.166 4	135.02	66.77	12.11	5.02	1.147 3
	9	40	1.154 3	123.08	61.41	10.78	4.73	1.139 0
	10	45	1.146 9	119.41	59.32	10.49	4.20	1.133 0

温度/℃	序号	加水率/%	固相离子质量分数/%				芒硝析出率/%	析出固相	温度/ ℃	序号	加水率/%	固相离子质量分数/%				芒硝析出率/%	析出固相
温度/℃	序号	加水率/%	Cl^-	Na⁺	Mg²⁺	SO₄^2-	芒硝析出率/%	析出固相	温度/ ℃	序号	加水率/%	Cl^-	Na⁺	Mg²⁺	SO₄^2-	芒硝析出率/%	析出固相
-5	1	0	22.23	37.56	1.69	38.27	73.74	NaCl·2H₂O+Mir	-10	7	25	7.64	30.86	0.65	60.63	72.39	Mir
	2	5	12.06	31.28	1.61	54.88	73.66	NaCl·2H₂O+Mir		8	35	7.30	30.88	0.69	60.92	69.85	Mir
	3	8	8.42	32.06	1.34	58.01	72.97	Mir		9	45	6.86	31.88	0.66	60.39	65.19	Mir
	4	10	7.96	31.99	0.77	59.13	72.27	Mir	-15	1	0	40.41	33.99	1.71	23.62	80.58	NaCl·2H₂O+Mir
	5	15	7.81	32.17	0.74	59.15	71.87	Mir		2	5	19.62	32.85	1.00	46.37	80.06	NaCl·2H₂O+Mir
	6	20	7.04	32.12	0.69	59.97	69.93	Mir		3	8	10.63	32.35	0.65	56.18	78.91	Mir
	7	25	6.81	32.06	0.59	60.40	69.10	Mir		4	10	9.93	31.11	1.36	57.40	77.20	Mir
-10	1	0	34.96	36.45	1.32	27.06	74.79	NaCl·2H₂O+Mir		5	15	8.61	31.33	1.13	58.72	75.40	Mir
	2	5	18.12	32.31	1.20	48.16	74.08	NaCl·2H₂O+Mir		6	20	8.70	31.16	0.50	59.47	75.17	Mir
	3	8	9.45	31.64	1.12	57.39	73.76	Mir		7	25	8.07	31.94	0.72	59.08	73.35	Mir
	4	10	8.54	32.12	0.65	58.51	73.72	Mir		8	30	8.38	31.04	0.67	59.70	72.34	Mir
	5	15	7.87	32.30	0.67	59.03	73.13	Mir		9	40	7.63	32.26	0.64	59.29	71.62	Mir
	6	20	7.56	31.14	0.60	60.58	72.75	Mir		10	45	7.15	31.74	0.76	60.13	70.33	Mir

编号	蒸失水率/%	液相离子质量浓度/（g·L^-1）				蒸发母液密度/（g·cm^-3）	pH	固相离子质量分数/%				NaCl析出率/%	析出固相
编号	蒸失水率/%	Cl^-	Na⁺	Mg²⁺	SO₄^2-	蒸发母液密度/（g·cm^-3）	pH	Cl^-	Na⁺	Mg²⁺	SO₄^2-	NaCl析出率/%	析出固相
1	51.04	194.91	61.84	45.07	43.88	1.226 6	7.68	60.85	38.06	0.72	0.24	74.79	NaCl
2	56.88	201.34	46.47	58.07	54.42	1.236 6	7.50	60.77	38.01	0.77	0.35	86.21
3	61.06	216.20	29.60	75.18	66.25	1.260 1	7.17	60.90	37.86	0.77	0.23	93.14
4	63.22	227.43	20.80	85.51	74.27	1.279 0	6.92	60.48	37.06	1.27	0.99	95.36	NaCl+Eps
5	65.58	269.31	15.88	100.74	68.14	1.304 8	6.65	60.24	35.53	2.21	1.82	97.59
6	71.88	336.00	11.47	118.67	39.95	1.338 7	4.05	60.85	38.06	2.97	4.06	98.94

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Inorganic Acid-Base-Salt Committee of CIESC

Study on salt crystallization law of brine frozen mirabilite and frozen mirabilite mother liquor evaporation in Jilantai Salt Lake

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