Research & Development

Study on yield of KCl prepared by cold crystallization of low?sodium carnallite

  • Zhijia QIE ,
  • Weibing DONG ,
  • Jingling DU ,
  • Shengkui MA ,
  • Gang WANG
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  • Key Laboratory of Resource Chemistry and Eco?environmental Protection in Tibetan Plateau,Qinghai Nationalities University,Xining 810007,China

Received date: 2021-08-03

  Online published: 2022-05-31

Abstract

The process of preparing potassium chloride by reverse flotation?cold crystallization method mainly includes three operating processes of flotation,crystallization and washing.Among them,the yield of potassium chloride in crystallization process is relatively low.The effect of the mass ratio of decomposition liquid to low?sodium carnallite,concentration of magnesium decomposition liquid,raw ore impurity ions and crystallization temperature on the yield of potassium chloride was studied experimentally.The research results showed that when the mass ratio was 1∶1.2,the yield was more than 63% and the quality of KCl could reach 95.06%.Increasing the concentration of magnesium decomposition liquid was beneficial to the crystallization yield of potassium chloride.When the concentration was 2.5 mol/L,the yield could reach more than 74%.The concentration range of this experiment was 0.05~0.15 mol/L,SO42- was beneficial for enhancing the yield of KCl.When the Ca2+ doping concentration was greater than 0.1 mol/L,the crystallization of potassium chloride was inhibited and the yield was decreased by 2.99%.When the Na+ doping concentration was increased to 0.3 mol/L,the yield decreased from 63.66% to 52.53%.With the increase of crystallization temperature,the yield of potassium chloride was decreased significantly.When the temperature was 15 ℃,the yield reached 76.55%,and when the temperature was increased to 25 ℃,the yield was decreased to 63.39%.

Cite this article

Zhijia QIE , Weibing DONG , Jingling DU , Shengkui MA , Gang WANG . Study on yield of KCl prepared by cold crystallization of low?sodium carnallite[J]. Inorganic Chemicals Industry, 2022 , 54(5) : 72 -78 . DOI: 10.19964/j.issn.1006-4990.2021-0465

References

1 熊增华,王石军.中国钾资源开发利用技术及产业发展综述[J].矿产保护与利用,2020,40(6):1-7.
1 XIONG Zenghua, WANG Shijun.Overview of potassium resources exploitation & utilization technology and potash industry development[J].Conservation and Utilization of Mineral Resources,2020,40(6):1-7.
2 王石军.全球钾肥产业发展现状与展望[J].磷肥与复肥,2019,34(10):9-13.
2 WANG Shijun.Development status and prospect of potash fertilizer industry in the world[J].Phosphate & Compound Fertilizer,2019,34(10):9-13.
3 周月,武娜,孙小虹,等.我国钾肥进出口贸易发展历程及近年来情况分析[J].磷肥与复肥,2020,35(9):1-7.
3 ZHOU Yue, WU Na, SUN Xiaohong,et al.Development history of China's potash fertilizer import and export trade and analysis on the situation in recent years[J].Phosphate & Compound Fertilizer,2020,35(9):1-7.
4 亓昭英,屈小荣,马锁立,等.2018年我国钾肥行业运行报告及发展预测[J].磷肥与复肥,2019,34(2):1-4.
4 QI Zhaoying, QU Xiaorong, MA Suoli,et al.Operational report of China's potassium fertilizer industry in 2018 and its development prediction[J].Phosphate & Compound Fertilizer,2019,34(2):1-4.
5 杨红梅.生产氯化钾的几种工艺分析[J].海湖盐与化工,2004,33(2):4-7.
5 YANG Hongmei.Analysis of the producing technology of potassium chloride[J].Sea-Lake Salt and Chemical Industry,2004,33(2):4-7.
6 常婷,程芳琴.国内外氯化钾生产工艺分析比较[J].山西大学学报:自然科学版,2008(S2):97-101.
6 CHANG Ting, CHENG Fangqin.Analysis and comparison on the production techniques of potassium chloride[J].Journal of Shanxi University:Natural Science Edition,2008(S2):97-101.
7 祁洪波,杨维强,王光成.氯化钾生产结晶设备及工艺研究[J].无机盐工业,2007,39(4):41-43.
7 QI Hongbo, YANG Weiqiang, WANG Guangcheng.Study on crystallization equipment and production process of potassium chlori?
7 de[J].Inorganic Chemicals Industry,2007,39(4):41-43.
8 保英莲,张志强.光卤石分解制取KCl结晶过饱和度影响的研究[J].盐业与化工,2014,43(9):15-18.
8 BAO Yinglian, ZHANG Zhiqiang.Effect of supersaturation on preparation of potassium chloride by decomposition of carnallite[J].Journal of Salt and Chemical Industry,2014,43(9):15-18.
9 汪贵元.反浮选—冷结晶生产氯化钾工艺控制的探讨[J].海湖盐与化工,2002,31(3):27-29.
9 WANG Guiyuan.Research of process control of potassium chloride production by reverse-flotation and cold?crystallization method[J].Sea-Lake Salt and Chemical Industry,2002,31(3):27-29.
10 谢玉龙,赵亮.光卤石分解制取氯化钾晶体粒度控制技术[J].盐湖研究,2010,18(2):62-64.
10 XIE Yulong, ZHAO Liang.Crystal grain?size control in the process of potassium chloride producing from carnallite decomposition method[J].Journal of Salt Lake Research,2010,18(2):62-64.
11 朱孔金.氯化钾结晶粒度控制试验研究[J].化工矿物与加工,2016,45(11):24-25,37.
11 ZHU Kongjin.Test on control of potassium chloride crystal size control[J].Industrial Minerals & Processing,2016,45(11):24-25,37.
12 李志强,杨立斌,沙作良,等.氯化钾间歇冷却结晶生长规律及粒度控制实验研究[J].无机盐工业,2019,51(8):33-36.
12 LI Zhiqiang, YANG Libin, SHA Zuoliang,et al.Experimental research on growth and crystal size control of potassium chloride in batch cooling crystallization[J].Inorganic Chemicals Industry,2019,51(8):33-36.
13 于雪峰,马光明,靳莹皓.反浮选法制氯化钾收率影响因素与控制[J].盐业与化工,2014,43(11):42-44.
13 YU Xuefeng, MA Guangming, JIN Yinghao.Yield influence factors and control of potassium chloride by reverse flotation method[J].Journal of Salt and Chemical Industry,2014,43(11):42-44.
14 保英莲.反浮选法生产过程中氯化钠对钾收率的影响[J].无机盐工业,2010,42(10):44-46.
14 BAO Yinglian.Effect of sodium chloride content on recovery rate of potassium in process of reverse floatation?cold crystallization[J].Inorganic Chemicals Industry,2010,42(10):44-46.
15 梁玉平.钾肥生产过程中氯化钾收率的影响因素和提升要点[J].盐科学与化工,2020,49(10):34-36.
15 LIANG Yuping.Influencing factors and promotion points of the yield of potassium chloride in the production of potassium fertilizer[J].Journal of Salt Science and Chemical Industry,2020,49(10):34-36.
16 MORGENSTERN L A.Production of potassium chloride by carnallite decomposition with water (cold crystallization)[J].Theoretical Foundations of Chemical Engineering,2014,48(1):113-115.
17 李刚.光卤石矿冷分解过程中氯化钠对氯化钾收率的影响[J].海湖盐与化工,1998,27(5):13-15,25.
17 LI Gang.Effect of sodium chloride on recovery rate of potassium chloride in carnallite cold decomposition[J].Sea-Lake Salt and Chemical Industry,1998,27(5):13-15,25.
18 韩冰,唐娜,沙作良,等.光卤石分解制氯化钾结晶机理研究[J].盐业与化工,2008,37(2):13-16.
18 HAN Bing, TANG Na, SHA Zuoliang,et al.Study on crystallization mechanism of producing potassium chloride by dissolving carnallite[J].Journal of Salt and Chemical Industry,2008,37(2):13-16.
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