摘要
为进一步提高磷灰石浮选精矿纯度,创新性地提出了采用磷酸浸出法脱除磷灰石浮选精矿中的方解石和白云石等碳酸盐脉石矿物的方法。酸浸条件对磷灰石提纯效果的影响规律研究表明,在磷灰石粒度为-38μm,稀磷酸浓度为10%,液固比为4∶1,反应温度为20℃,反应时间为240 s条件下进行磷灰石浮选精矿的磷酸浸出试验,可将纯度为86.88%的磷灰石提纯至99.36%。酸浸机理研究表明,磷灰石不与磷酸发生反应,而方解石和白云石均可以与过量的磷酸反应生成溶于水的物质而被脱除;经过磷酸浸出提纯后的磷灰石纯度较高,结晶良好。研究结果对碳酸盐矿物钙质型磷矿的提纯降杂具有重要参考意义。
Phosphoric acid leaching was proposed firstly to remove carbonate gangue minerals such as calcite and dolomite from the flotation concentrate of apatite to further improve its purity.The effect of leaching conditions on apatite purity shows that the apatite with purity of 86.88%can be purified to 99.36%by the phosphoric acid leaching test under the conditions of the sample with a particle size of-38μm,phosphoric acid concentration of 10%,liquid-solid ratio of 4∶1,reaction temperature of 20℃and reaction time of 240 s.The research on acid leaching mechanism shows that apatite does not react with phosphoric acid whereas both calcite and dolomite can react with excessive phosphoric acid to form the soluble substances and then be removed.The high purity and good crystallization of apatite was obtained after the phosphoric acid leaching.This research can provide a reference for the purification of carbonate containing phosphate ore.
作者
韩会丽
苏峻樟
刘涛
黄睿雯
王余莲
袁志刚
孙浩然
印万忠
操斌
苏德生
高畅
HAN Huili;SU Junzhang;LIU Tao;HUANG Ruiwen;WANG Yulian;YUAN Zhigang;SUN Haoran;YIN Wanzhong;CAO Bin;SU Desheng;GAO Chang(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;School of Environment and Chemistry Engineering,Shenyang Ligong University,Shenyang 110159,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Liaoning Province Ultra High Power Graphite Electrode Material Professional Technology Innovation Center,Dandong 118100,China;Liaoning Guorui New Materials Co.,Ltd.,Fushun 113217,China)
出处
《金属矿山》
CAS
北大核心
2023年第10期127-132,共6页
Metal Mine
基金
国家自然科学基金青年基金项目(编号:51804200)
辽宁省科技厅重点研发计划-应用基础研究项目(编号:2022JH2/101300111)
辽宁省教育厅面上项目(编号:LJKMZ20220588)
教育部供需对接就业育人项目(编号:20230101257)
辽宁省“大学生创新训练计划”项目(编号:S202210144002)
沈阳理工大学引进高层次人才科研支持计划(编号:1010147001202)。
关键词
磷灰石
磷酸浸出
提纯降杂
白云石
方解石
apatite
phosphoric acid leaching
purification
dolomite
calcite
