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 ›› 2021, Vol. 53 ›› Issue (12): 100-104.doi: 10.19964/j.issn.1006-4990.2021-0103

• 研究与开发 • 上一篇    下一篇

川东达州地区地下卤水75 ℃等温蒸发析盐规律研究

彭杨1(),冯振华1,2,3,程籽毅1,周堃1()   

  1. 1.成都理工大学材料与化学化工学院,四川成都610059
    2.四川省地质矿产勘查开发局成都综合岩矿测试中心(国土资源部成都矿产资源监督检测中心)稀有稀土战略资源评价与利用四川省重点实验室
    3.四川省地质矿产勘查开发局成都综合岩矿测试中心
  • 收稿日期:2021-02-19 出版日期:2021-12-10 发布日期:2021-12-16
  • 作者简介:彭杨(1997— ),男,硕士研究生,研究方向为矿产资源综合利用;E-mail: 1109906956@qq.com

Study on salting-out law of the underground brine in Dazhou area,East Sichuan through isothermal evaporation at 75 ℃

PENG Yang1(),FENG Zhenhua1,2,3,CHENG Ziyi1,ZHOU Kun1()   

  1. 1.College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China
    2. Evaluation and Utilization of Strategic Rare Metals and Rare Earth Resource Key Laboratory of Sichuan Province;Chengdu Analytical & Testing Center,Sichuan Bureau of Geology & Mineral Resources(Chengdu Mineral Resources Supervision and Testing Center,Ministry of Land and Resources)
    3. Sichuan Bureau of Geology and Mineral Resources Chengdu Analytical &Testing Center for Mineral and Rocks
  • Received:2021-02-19 Published:2021-12-10 Online:2021-12-16

摘要:

四川东部达州地区地下卤水资源丰富,卤水储量约为8.23×108 m3,富含钠、钾、锂、硼、铷、溴等元素。实验研究了该卤水在75 ℃等温蒸发过程中溶液pH变化规律、各种元素在溶液和固相中的富集规律,并通过X射线衍射(XRD)检测析出矿物的种类,确定了矿物的析出顺序。实验研究结果表明:溶液pH随着蒸失率的增加而降低;氯化钠在整个蒸发过程中大量析出,氯化钾在蒸失率达到77.3%时开始大量析出,蒸发接近末尾时钙、硼都有部分析出;蒸发过程中矿物的析出顺序为氯化钠→氯化钠+氯化钾→氯化钠+氯化钾+硼酸,蒸发过程中的析盐规律与K+,Na+,Mg2+//Cl--H2O(75 ℃)四元相图吻合。根据蒸发实验数据初步设计出卤水资源利用工艺路线。该研究结果为川东地下卤水的开发和综合利用提供了可靠的基础数据。

关键词: 地下卤水, 等温蒸发, 富集规律, 工艺路线

Abstract:

Abundant underground brine resources are in the Dazhou area of eastern Sichuan,with reserves of about 8.23×108 m3,which are rich in sodium,potassium,lithium,boron,rubidium,bromine and other elements.The change of pH,the en-richment regularity and salting out law during the process of isothermal evaporation at 75 ℃ of the brine was investigated in the experiment.The types of precipitated salts were detected by XRD,and the precipitation order of salts was determined.Ex-perimental research results showed that the solution pH decreased with increasing loss rate.Sodium chloride largely precipi-tated in the whole evaporation process.Potassium began to largely precipitate as potassium chloride when the evaporation rate reached 77.3%.When the evaporation was near the end,both calcium and boron were partially analyzed.The order of appear-ance of the salt was:sodium chloride→sodium chloride+potassium chloride→sodium chloride+potassium chloride+boric acid.The law of evaporation was the same as the phase diagram of K+,Na+,Mg2+//Cl--H2O(75 ℃).Preliminary design of the process route for the utilization of brine resources was based on the evaporation experiment data.The research results provided reliable basic data for the development and comprehensive utilization of underground brine in eastern Sichuan.

Key words: underground brine, isothermal evaporation, enrichment law, process route

中图分类号: