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[1]叶军建,王贤晨,李显波,等.酸对捕收剂在胶磷矿和白云石表面吸附的影响[J].武汉工程大学学报,2017,39(06):565-570.[doi:10. 3969/j. issn. 1674⁃2869. 2017. 06. 007]
　YE Junjian,WANG Xianchen,LI Xianbo,et al.Effects of Acid on Adsorption of Collector onCollophane and Dolomite Surface[J].Journal of Wuhan Institute of Technology,2017,39(06):565-570.[doi:10. 3969/j. issn. 1674⁃2869. 2017. 06. 007]
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酸对捕收剂在胶磷矿和白云石表面吸附的影响(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
39
期数:
2017年06期
页码:
565-570
栏目:
化学与化学工程
出版日期:
2017-12-30

文章信息/Info

Title:
Effects of Acid on Adsorption of Collector onCollophane and Dolomite Surface
文章编号:
1674 - 2869（2017）06 - 0565 - 06 武 汉 工 程 大 学 学 报 J
作者:
叶军建1; 2; 3 ; 王贤晨 1; 2; 3 ; 李显波 1; 2; 3 ; 池晓汪 1; 2; 3 ; 张覃1; 2; 3*
1. 贵州大学矿业学院，贵州 贵阳 550025；2. 喀斯特地区优势矿产资源高效利用国家地方联合工程实验室，贵州 贵阳 550025 3. 贵州省非金属矿产资源综合利用重点实验室，贵州 贵阳 550025
Author(s):
YE Junjian 1; 2; 3 ; WANG Xianchen 1; 2; 3 ; LI Xianbo 1; 2; 3 ; CHI Xiaowang 1; 2; 3 ; ZHANG Qin 1; 2; 3*
1. Mining College，Guizhou University，Guiyang 550025，China；2. National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas，Guiyang 550025，China；3. Guizhou Key Laboratory of Comprehensive Utilization of Nonmetal Mineral Resources，Guizhou University，Guiyang 550025，China
关键词:
胶磷矿 - 白云石; 反浮选; 捕收剂 GJBW; 硫酸; 磷酸; 吸附
Keywords:
collophane - dolomite; reverse flotation; collector GJBW; sulfuric acid ; phosphoric acid; adsorption
分类号:
TD923.14；TD97
DOI:
10. 3969/j. issn. 1674⁃2869. 2017. 06. 007
文献标志码:
A
摘要:
浮选过程中抑制剂会使矿物表面亲水，还可能与捕收剂存在竞争吸附. 硫酸和磷酸是钙（镁）质磷矿石反浮选工艺常用的抑制剂. 通过单矿物和人工混合矿浮选试验及吸附量测定，研究了胶磷矿 - 白云石反浮选体系中，抑制剂硫酸或磷酸浓度对捕收剂 GJBW 在矿物表面吸附量的影响. 结果表明，酸浓度对矿物上浮率影响较大，但对捕收剂在胶磷矿和白云石表面吸附量影响均较小，说明该体系中抑制剂和捕收剂在矿物表面不是竞争吸附而是共同吸附，综合决定表面亲/疏水性，进而影响其上浮率. 于是建立了两者在矿物表面共同吸附的双电层模型，其中不溶油酸分子（HOl）作为主要捕收剂组分在白云石 - 水界面起主导作用使表面疏水，而胶磷矿酸溶释放出的或磷酸电离出的 H 2 PO 4 - 做为主要抑制组分在胶磷矿 - 水界面起主导作用使表面亲水.
Abstract:
Depressants could make mineral surface hydrophilic，and there may be a competitive adsorptionbetween depressants and collectors in the progress of flotation. Sulfuric acids and phosphoric acids arecommonly used as depressants in reverse flotation of calcareous - dolomitic phosphate ores. This paperinvestigated the effects of the concentrations of depressants（H 2 SO 4 or H 3 PO 4 ）on the adsorption capacity ofcollector GJBW at mineral surfaces in reverse flotation of collophane and dolomite by micro - flotation andmeasurement. The results indicated that the acid concentration greatly affected the flotation recovery ofminerals，but it slightly affected the adsorbing capacity of collectors on collophane and dolomite surfaces，whichindicated that depressants and collectors in the system were synergistic adsorption rather than competitiveadsorption at the mineral surfaces. Depressants and collectors collaboratively decided the surface properties ofhydrophilicity or hydrophobicity，thereby affecting the flotation recovery of minerals. Moreover，the doubleelectric - layer models of synergistic adsorption between depressants and collectors at the mineral surfaces weredeveloped. In the models，the insoluble oleic acid molecule（HOl）acted as the main collector component at thedolomite - water interface to make the surface hydrophobic，and the H 2 PO 4 - ions from the release of collophanedissolution or ionization of phosphoric acid functioned as the main inhibitory component in the phosphate - waterinterface to dominate the surface hydrophilic.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2017-05-27基金项目：国家自然科学基金（51474078）作者简介：叶军建，博士研究生. E-mail： [email protected]*通讯作者：张　覃，博士，教授，博士研究生导师. E-mail： [email protected]
更新日期/Last Update: 2018-01-04