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 (5): 53-57.doi: 10.19964/j.issn.1006-4990.2023-0386

• 研究与开发 • 上一篇    下一篇

钾长石混盐焙烧-浸出提钾过程研究

方小宁1(), 匡飞1, 刘程琳1,2()   

  1. 1.铜仁职业技术学院,贵州 铜仁 554300
    2.华东理工大学,国家盐湖资源综合利用工程技术研究中心,上海 200237
  • 收稿日期:2023-07-21 出版日期:2024-05-10 发布日期:2024-05-15
  • 通讯作者: 刘程琳(1986— ),男,博士,副教授,主要研究方向为矿产资源综合利用;E-mail:liuchenglin@ecust.edu.cn
  • 作者简介:方小宁(1976— ),女,硕士,副教授,主要研究方向为矿产资源综合利用;E-mail:603598858@qq.com
  • 基金资助:
    黔科合基础项目([2018]1421)

Study on extraction of potassium from K-feldspar by roasting-leaching of mixed salts

FANG Xiaoning1(), KUANG Fei1, LIU Chenglin1,2()   

  1. 1.Tongren Polytechnic College,Tongren 554300,China
    2.National Engineering Research Center for Integrated Utilization of Salt Lake Resources,East China University of Science and Technology,Shanghai 200237,China
  • Received:2023-07-21 Published:2024-05-10 Online:2024-05-15

摘要:

中国钾盐资源匮乏,而钾长石是一种重要的钾赋存形式。然而,钾长石的开发技术难度大、成本高,至今尚未实现工业化应用。为了解决钾长石开发利用过程中钾提取温度高、浸出率低等问题,该研究选取了贵州铜仁地区钾长石矿为研究对象,探究了钾长石-硫酸钠-碳酸钙混盐的焙烧-浸出过程,考察了钾长石-硫酸钠-碳酸钙的焙烧配比、焙烧温度、焙烧时间、浸取剂浓度等因素对钾长石中钾元素浸出率的影响。实验结果显示,在焙烧体系均匀混合、焙烧温度为800∼900 ℃、焙烧时间为1 h、m(钾长石):m(硫酸钠):m(碳酸钙)为(1:1:6)~(1:1:8)条件下,以质量分数为5% NaOH溶液作为浸取液,钾的浸出率可高达99.79%。该研究提供了一条提高钾长石资源利用效率、解决钾盐资源供应问题的新途径,并为相关工业生产提供了有力的技术支持。

关键词: 钾长石, 焙烧, 浸出提钾, 热力学

Abstract:

Potash resources are scarce in China,and K-feldspar is an important form of potassium occurrence.However,the development of K-feldspar involves significant technical challenges and high costs,and industrial utilization has not yet been achieved.To address issues like high temperatures and low leaching rates during the development and utilization of K-feldspar,the K-feldspar ore from the Guizhou Tongren was selected as research target in this study,and the mixed-salt roasting-leaching process of K-feldspar-sodium sulfate-calcium carbonate was investigated.The effects of factors such as the ratios of K-feldspar-sodium sulfate-calcium carbonate roasting,roasting temperature,roasting time,and leaching reagent on the leaching rate of potassium elements in K-feldspar were explored.The experimental results indicated that under conditions of uniform roasting mixture,roasting temperatures within the range of 800∼900 ℃,roasting time of 1 h,a roasting composition ratio of ore,sodium sulfate,and calcium carbonate at(1:1:6)~(1:1:8),and leaching using a mass fraction of 5% NaOH solution,the leaching rate of potassium could reach as high as 99.79%.This study offered a new approach to enhance the efficiency of K-feldspar resource utilization and address potassium resource supply issues.Moreover,it provided robust technical support for relevant industrial production.

Key words: K-feldspar, calcination, leaching of potassium, thermodynamic

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