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 ›› 2013, Vol. 45 ›› Issue (7): 42-.

• 论文 • 上一篇    下一篇

硝酸浸取磷矿制轻质碳酸钙工艺研究

胡兆平,贾洪秀,庞世花,刘 阳,贾 亮   

  1. 山东金正大生态工程股份有限公司,山东临沭 276700
  • 出版日期:2013-07-10 发布日期:2013-07-16

Preparation of light calcium carbonate by nitric acid leaching phosphate ore

 HU  Zhao-Ping, JIA  Hong-Xiu, PANG  Shi-Hua, LIU   Yang, JIA   Liang   

  1. Shandong Kingenta Ecological Engineering Co.,Ltd.,Linshu 276700,China
  • Published:2013-07-10 Online:2013-07-16

摘要: 硝酸萃取磷矿后的酸解液,通过冷冻结晶法得到硝酸钙晶体,然后以硝酸钙为原料,通过加入碳酸氢铵进行碳化制取轻质碳酸钙。结果表明,碳化反应的初始反应温度为常温,硝酸钙溶液的质量分数为23%左右,碳酸氢铵和氨水按理论加入量的110%进行反应,用产品质量的4倍洗水量洗涤产品,制备的轻质碳酸钙产品各项指标均达到HG/T 2226—2000《工业沉淀碳酸钙》标准的要求。

关键词: 硝酸钙, 碳酸氢铵, 碳化, 轻质碳酸钙

Abstract: Calcium nitrate crystal can be obtained by freezing crystallization method from acid solution acquired from nitric acid extracting phosphate rock. After that,light calcium carbonate was prepared by carbonization reaction between ammonium hydrogen carbonate and calcium nitrate crystal.Results show that,the initial carbonization reaction temperature was the normal temperature,mass fraction of calcium nitrate solution was about 23%,ammonium hydrogen carbonate and ammonia dosages were both 110% of theoretical addition amounts,and products were washed by four times of product weight washing water.All quality indexes of the product can meet the standard of Industrial Precipitated Calcium Carbonate,HG/T 2226—2000.

Key words: calcium nitrate, ammonium hydrogen carbonate, carbonization, light calcium carbonate

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