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 ›› 2016, Vol. 48 ›› Issue (10): 36-.

• 论文 • 上一篇    下一篇

氯化焙烧法制备无水氯化钙的工艺研究

李全超1,童张法1,陈志传2,李 钧2   

  1. 1.广西大学化学化工学院,广西南宁 530004;2.深圳市危险废物处理站有限公司
  • 出版日期:2016-10-10 发布日期:2016-10-08

Preparation of anhydrous calcium chloride by ammonium chloride roasting method

Li Quanchao1,Tong Zhangfa1,Chen Zhichuan2,Li Jun2   

  1. 1.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;
    2.Shenzhen Hazardous Waste Treatment Station Co.,Ltd.
  • Online:2016-10-10 Published:2016-10-08

摘要: 研究了用氯化铵作为氯化剂氯化焙烧碳酸钙制备无水氯化钙的工艺条件,通过单因素实验考察了焙烧温度、物料配比、焙烧时间及物料装载厚度的影响,并用XRD对无水氯化钙进行了表征。结果表明氯化焙烧法制无水氯化钙的最佳工艺条件为:焙烧温度为450 ℃、焙烧时间为60 min、氯化铵与碳酸钙物料配比n(氯化铵)∶n(碳酸钙)=3∶1、物料装载厚度大于1 cm。此条件下碳酸钙的转化率为95.8%、焙烧产物氯化钙的质量分数为94.96%。用工业级原料焙烧时,选用粒径为10.5 μm的工业重钙与工业氯化铵焙烧120 min,碳酸钙的转化率为95.19%,无水氯化钙的质量分数为94.83%。

关键词: 氯化铵, 氯化焙烧, 碳酸钙, 无水氯化钙

Abstract: Technological conditions in preparation of anhydrous calcium chloride with ammonium chloride as chlorinating agent to roasting chlorinate calcium carbonate were studied.The influences of roasting temperature,dosing ratio of reactants, roasting time,and thickness of material loading were investigated by single factor experiments.The anhydrous calcium chlo- ride product was characterized by XRD.The optimum experimental conditions were obtained: roasting temperature was 450 ℃, roasting time was 60 min,dosing ratio of n(NH4Cl)∶n(CaCO3)=3:1,and loading thickness was greater than 1 cm.Under these conditions,the chlorinating rate of calcium carbonate reached 95.8%,calcined product of anhydrous calcium chloride mass percentage was 94.96%.In industrial size,industrial heavy calcium carbonate with 10.5 μm and industrial ammonium chlo- ride were roasted for 120 min,the chlorinating rate of calcium carbonate reached 95.19%,and calcined product of anhydrous calcium chloride mass percentage was 94.83%.

Key words: ammonium chloride;chlorination roasting;calcium carbonate;anhydrous calcium chloride
vity,
and mechanism of nano-TiO2 co-doped with nitrogen and iron

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