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 ›› 2022, Vol. 54 ›› Issue (10): 52-56.doi: 10.19964/j.issn.1006-4990.2022-0062

• 盐湖资源开发与利用 • 上一篇    下一篇

盐湖水氯镁石复合精制实验研究

邓良明1(),蒋志税2,李一凰3   

  1. 1.青海金锋实业有限公司,青海 海西 817000
    2.青海创赢科技服务有限公司
    3.西宁市创新促进中心
  • 收稿日期:2022-02-17 出版日期:2022-10-10 发布日期:2022-11-03
  • 作者简介:邓良明(1960— ),男,主要从事纯碱废液生产氯化钙和盐湖氯化镁生产融雪剂等工作;E-mail:510367277@qq.com
  • 基金资助:
    青海省科技厅成果转化专项“球状氯化镁融雪剂新工艺”(2020-GX-C04)

Experimental study on compound refining of salt lake bischofite

DENG Liangming1(),JIANG Zhishui2,LI Yihuang3   

  1. 1. Qinghai Jin -Feng Industrial Co. ,Ltd. ,Haixi 817000,China
    2. Qinghai Chuangying Technology Service Co. ,Ltd.
    3. Xining Innovation Promotion Center
  • Received:2022-02-17 Published:2022-10-10 Online:2022-11-03

摘要:

盐湖水氯镁石是盐湖产业区最重要的镁资源,也是镁系列产品的主要原料。氯化镁在交通行业用于道路融雪。氯化镁作为融雪剂,对色度要求较高。实验利用活性炭加双氧水复合脱色、硫化铵化学除杂对盐湖水氯镁石的饱和溶液进行处理,获得了能满足氯化镁融雪剂要求的氯化镁精制溶液。在活性炭和双氧水加入量均为氯化镁饱合溶液质量的5%、在50 ℃条件下脱色处理90 min,脱色率可达94.2%。通过将脱色后溶液调成中等碱性,然后再加入硫化铵使铁、铜、锰、铅4种杂质离子以沉淀形式去除,在硫离子加入量为饱合溶液质量的0.15%、80 ℃条件下硫化2.0 h,最后溶液中铁、铜、锰、铅等杂质离子质量分数均低于0.000 5%。

关键词: 水氯镁石, 复合精制, 融雪剂, 氯化镁

Abstract:

Salt lake bischofite is the most important magnesium resource in the salt lake industrial area,and it is the main raw material of magnesium series products.Magnesium chloride is used in the transportation industry for road snowmelt,as magnesium chloride snow melting agent,which has high requirements on the color of the product.In this experiment,the saturated solution of the salt lake bischofite was processed by the composite decolorization of activated carbon and hydrogen peroxide and the chemical impurity removal of ammonium sulfide to obtain a refined magnesium chloride solution that could meet the requirements of the magnesium chloride snow melting agent.When activated carbon and hydrogen peroxide were added at 5% and 50 ℃ for 90 min,the decolorization rate could reach 94.2%.By adjusting the decolorized solution to moderately alkaline and then adding ammonium sulfide,Fe,Cu,Mn and Pb ions were removed in the form of precipitation.The content of Fe,Cu,Mn,Pb impurity ions in the final solution were all less than 0.000 5% under the condition of 0.15% sulfur ion addition and vulcanization at 80 ℃ for 2.0 h.

Key words: bischofite, compound refining, snow-melting agent, magnesium chloride

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