察尔汗盐湖察尔汗区段西部固体钾矿溶采效果研究

doi:10.19964/j.issn.1006-4990.2023-0200

Abstract

Abstract:

The solid potassium ore of Qarhan area in Qarhan Salt Lake has the characteristics of low grade，discontinuous ore body and large resource reserves，which can not be mined by conventional mining methods and causes many difficulties for the exploitation and utilization of solid potassium.The change characteristics of the solid potassium ore in some typical boreholes before（2013） and after（2021） large-scale liquefaction mining exploitation in the western Qarhan area of Qarhan Salt Lake was compared and analyzed.The results showed that the solubility of solid potassium ore was 34.40%~99.98% with an average of 80.55%，and the solid potassium with the higher grade had a higher solubility，which meant the reduction of KCl grade was greater.The solid potash ore with the KCl grade of 0.1%~0.2% could be dissolved.The grade of solid magnesium salt was lower than before，but the grade of solid sodium salt was higher than before.The study on grade，thickness and variation characteristics of brine component of typical borehole solid potassium ore in western Qarhan area provided scientific evidence for evaluation of efficiency of liquefaction mining of solid potassium ore.On the whole，the efficiency of liquefaction mining was good in most area，but the influences of large hydraulic gradient，brine canal barrier and weak hydraulic connection on mining needed further study.

Key words: efficiency of liquefaction mining, solid potassium ore, Qarhan area, Qarhan Salt Lake

CLC Number:

TQ131.13

WEI Jincai, CHEN Jingyuan, SONG Guichun, JIA Jiantuan, GONG Guoli. Study on efficiency of liquefaction mining of solid potassium ore in western Qarhan area of Qarhan Salt Lake[J]. Inorganic Chemicals Industry, 2024, 56(3): 70-79.

Figures/Tables 10

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钻孔编号	固体钾盐厚度/m	KCl品位/%	固体石盐厚度/m	NaCl品位/%	固体镁盐厚度/m	MgCl₂品位/%
H19206	2.08	0.25	7.25	66.79	7.25	4.01
H21204	6.56	0.36	8.60	73.29	8.60	3.07
H20810	2.00	0.23	12.20	73.37	12.20	2.84
H20813	11.23	1.52	15.60	73.60	15.60	4.10
H20815	0.72	0.24	18.00	76.56	18.00	2.21
B22401	2.26	0.22	10.00	73.36	10.00	2.08
B22403	0.50	0.34	11.50	81.61	11.50	1.90
B22405	1.00	0.32	16.50	76.00	16.50	2.84
B22407	4.80	0.45	16.50	76.66	16.50	3.10
B22409	7.50	0.82	17.00	77.15	17.00	3.08
H24802	2.45	0.24	11.40	73.32	11.40	2.06
H25201	16.18	1.02	16.10	72.53	16.10	3.48

孔号	2013年		2021年		变化值		变化率/%
孔号	品位/ %	厚度/ m	品位/ %	厚度/ m	品位/ %	厚度/ m	品位/ %	厚度/ m
H21614	0.88	14.65	1.7	16.870	+0.82	+2.22	+93.18	+15.15
H21612 （CG25）	0.19	3.96	0.53	7.759	+0.34	+3.799	+178.95	+95.93
H21609 （CG26）	1.33	5.50	0.59	8.905	-0.74	+3.405	-55.64	+61.91
H23202	1.23	2.91	0.61	6.198	-0.62	+3.288	-50.41	+112.99
H24803 （CG39）	1.90	1.80	0.20	6.676	-1.7	+4.876	-89.47	+270.89
H24802	1.15	2.70	0.68	4.343	-0.47	+1.643	-40.87	+60.85

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Study on efficiency of liquefaction mining of solid potassium ore in western Qarhan area of Qarhan Salt Lake

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