无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (3): 70-79.doi: 10.19964/j.issn.1006-4990.2023-0200

• 研究与开发 • 上一篇    下一篇

察尔汗盐湖察尔汗区段西部固体钾矿溶采效果研究

魏进财1(), 陈晶源2(), 宋桂春2, 贾建团2, 龚国力1   

  1. 1.格尔木藏格钾肥有限公司,青海格尔木 816099
    2.青海省柴达木综合地质矿产勘查院,青海省柴达木盆地盐湖资源勘探研究重点实验室,青海格尔木 816099
  • 收稿日期:2023-04-26 出版日期:2024-03-10 发布日期:2024-03-14
  • 通讯作者: 陈晶源(1992— ),男,硕士,工程师,主要从事盐类矿产资源勘查工作;E-mail:493383716@qq.com
  • 作者简介:魏进财(1992— ),男,工程师,主要从事盐类化工工艺;E-mail:1511778350@qq.com

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

WEI Jincai1(), CHEN Jingyuan2(), SONG Guichun2, JIA Jiantuan2, GONG Guoli1   

  1. 1.Golmud ZangGe Potash Co. Ltd.,Golmud 816099,China
    2.Qaidam Comprehensive Geological and Mineral Exploration Institute of Qinghai Province,Qinghai Provincial Key Laboratory of Exploration Research of Salt Lake Resources in Qaidam Basin,Golmud 816099,China
  • Received:2023-04-26 Published:2024-03-10 Online:2024-03-14

摘要:

察尔汗盐湖察尔汗区段固体钾矿具有品位低、矿体不连续、资源储量较大等特点,不能使用常规采矿方法直接开采,为钾矿的开采和利用造成诸多困难。对察尔汗盐湖察尔汗区段西部大规模水溶开采前(2013年)和开采后(2021年)典型钻孔固体钾矿变化特征进行分析,结果表明:固体钾矿的溶解率在34.40%~99.98%,平均溶解率为80.55%,且垂向上固体KCl品位越高,溶采过程中的溶解率越高,含量降低幅度就越大;长时间的浸泡可以使固体KCl品位在0.1%~0.2%的钾盐也被溶解;固体镁盐品位较以往有所下降,而固体石盐品位较以往有所上升。对察尔汗区段西部典型钻孔固体钾矿品位、厚度及卤水组分变化特征进行研究,为固体钾矿的溶采效果评价提供了科学依据,整体而言,水溶开采在大部分区域的开采中具有良好效果,但水力坡度大、卤渠阻隔、水力联系弱等因素对开采造成的影响,仍需进一步研究。

关键词: 溶采效果, 固体钾矿, 察尔汗区段, 察尔汗盐湖

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

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