玛纳斯湖卤水自然蒸发析盐规律及硼、锂富集规律研究

doi:10.19964/j.issn.1006-4990.2021-0342

Abstract

Abstract:

The crystallization sequence of salts in the Manasi salt lake of xinjiang brine during the evaporation process at 20 ℃ was calculated through ISLEC.The natural evaporation of this brine was conducted in laboratory according the result of ISLEC,and the crystallization sequence of salts was in accord with the calculated one.The enrichment and distribution rules of trace elements such as boron and lithium during evaporation were studied.The crystallization route when the water of Manas lake evaporates naturally in the room is ①CaSO₄·2H₂O+NaCl;②CaSO₄·2H₂O+NaCl+MgSO₄·6H₂O;③NaCl+MgSO₄·6H₂O+KCl（a bit）+KCl·MgCl₂·6H₂O;④NaCl+MgSO₄·6H₂O+KCl·MgCl₂·6H₂O+MgCl₂·6H₂O.The content of KCl in the crystallized salts was 14.24% according to the ISLEC calculated result,and 10.59% obtained from experiment.And the boron or lithium did not crystallize,which was enriched about 16 times in the concentrated brine.And the mass fraction of B₂O₃ was about 1%,and that of Li⁺ was about 100 mg/L.The suggestion for utilization was proposed according to the research result as that in order to obtain carnallite with high grade,the sulfate in brine should be crystallized out as Na₂SO₄·10H₂O in winter before the evaporation in summer.

Key words: ISLEC, calculation, Manasi salt lake, natural evaporation, crystallization sequence

CLC Number:

TQ128.1

BIAN Shaoju, XU Naicai, ZHANG Yongxing, LI Wu. Crystallizing sequence of salts and enrichment rule of boron and lithium during natural evaporation of Manasi salt lake brine[J]. Inorganic Chemicals Industry, 2021, 53(11): 55-59.

Figures/Tables 8

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References 11

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样品	w （NaCl）	w （MgSO₄）	w （KCl）	w （MgCl₂）	w （B₂O₃）	w （Li⁺）
L0	18.12	5.73	0.72	3.66	0.078	0.000 44
LH	23.96	1.52	0.25	1.37	—	—

样品	w（NaCl）	w（MgSO₄）	w（KCl）	w（MgCl₂）	w（Li⁺）
L0	18.12	5.73	0.72	3.66	0.000 44
L1C	10.40	11.11	1.41	7.07	0.000 80
L2C	2.47	4.85	3.87	19.47	0.002 20
L3C	0.25	2.63	0.21	31.21	0.004 70

样品	w （NaCl）	w （MgSO₄·nH₂O）	w（KCl·MgCl₂·6H₂O）	w（MgCl₂·6H₂O）	w（钾分布）/%
S1C	100.00	—	—	—	—
S2C	33.16	66.84 （n=7）	—	—	—
S3C	8.87	25.90（n=6）	53.09	—	97.58

样品	密度/（g·mL^-1）	温度/℃	w（NaCl）	w（MgSO₄）	w（KCl）	w（MgCl₂）	w（B₂O₃）	ρ（Li⁺）/（mg·L^-1）
L0	1.243 2	19	18.12	5.73	0.72	3.66	0.078	6.68
L1	1.254 7	18	11.24	11.32	1.41	7.11	0.148	12.66
L2	1.281 9	18	7.77	8.80	2.31	11.41	0.238	20.47
L3	1.299 9	22	2.15	5.93	3.91	20.22	0.414	36.00
L4	1.314 8	18	—	4.12	0.92	27.68	0.705	61.59
L5	1.357 2	21	—	3.78	0.11	33.67	1.134	107.82

样品	w（A）	w（B）	w（C）	w（D）	w（E）	w（F）	w（盐）	w（母液）	w（总）	XRD
S1	0.45	82.62	—	—	—	—	83.07	17.46	100.53	A+B
S2	1.05	30.93	53.66	—	—	—	85.64	12.73	98.37	B+C
S3	—	35.62	51.99	1.35	—	—	88.96	8.58	97.54	B+C
S4	—	9.64	27.59	49.20	1.14	—	87.56	12.49	100.05	B+C+D
S5	—	2.19	14.01	13.64	—	2.19	79.90	21.29	101.19	B+C+D+F

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Crystallizing sequence of salts and enrichment rule of boron and lithium during natural evaporation of Manasi salt lake brine

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编号	B₂O₃ 浓缩倍数	Li⁺ 浓缩倍数	卤水浓缩倍数
M-L1	1.89	1.88	1.95
M-L2	3.05	3.06	3.14
M-L3	5.30	5.39	5.53
M-L4	9.04	9.22	9.39
M-L5	15.76	16.14	16.46

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