鄂西高磷赤铁矿提铁降磷工艺性能研究
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摘要
本实验以鄂西高磷赤铁矿为研究对象,鄂西高磷鲕状赤铁矿矿物成分复杂,嵌布极细,杂质磷、铝、硅的含量高,属极为难选的铁矿石,由于微细矿物颗粒容易发生互凝聚和矿泥罩盖,导致最终浮选效果的恶化。宜采用分散—选择性絮凝—反浮选的方法,来达到提铁降磷的目的。
矿浆中加入分散剂之后,根据DLVO理论,矿浆颗粒之间的分散稳定性将取决于体系的范德华引力作用势能,水化排斥势能,空间位阻势能,双电层作用势能。絮凝步骤中絮凝剂选择性吸附带负电的矿物离子,使矿物颗粒聚沉,絮凝后得到粗精矿,再进一步通过反浮选能得到铁含量较高的精矿
本实验主要得出的结论包括：(1)通过强磁选实验确定最佳电流为18A,使铁品位由43.71wt%提高到51.30wt%,磷含量由0.93wt%降到0.66wt%。(2)通过单因素实验确定最佳分散剂为六偏磷酸钠,可使分散效果达到85%。(3)改性常用絮凝剂得到改性聚丙烯酰胺,可使矿浆有效絮凝。絮凝后铁品位提高至51.94wt%,磷降为0.44wt%。(4)改性浮选剂并得到最佳浮选条件,包括抑制剂,活化剂,浮选剂及pH环境等。反浮选最后的结果为铁品位55.54wt%,磷含量为0.420wt%,与原矿相比铁品位提高了12.71wt%,磷含量降低了0.51wt%。
本实验通过对选矿过程三个环节工艺条件的研究得到一种有效处理高磷赤铁矿的工艺方法。对我国未来开发低品位铁矿提供了一种有效手段。
This research take the hematite with high phosphorus in Western Hubei as research subject. The composition of this oolitic hematite mineral is very complex, embedded cloth very fine, impurities content such as phosphorus、aluminum、silicon are high, belong to those kind of iron ore that extremely difficult to choose from. Due to the fine mineral particles prone to mutual solidarity and slime cover, causing the deterioration of the final flotation. It should be adopted dispersed-selective flocculation-flotation method to achieve reduced phosphorus and increased iron。
After added disperse agent, in the DLVO theory, dispersion stability of the pulp system is decided by Vander Waal force potential energy, space resistance potential energy and double-electrodes layer potential energy. In the flocculation step, flocculant selective absorption of mineral negatively charged ions, get the mineral grains to sink, flocculation resulting concentrate and through the further reverse flotation can get a high iron content of concentrates.
The conclusion of this experiment mainly include:(1)By strong magnetic separation experiments to determine the optimal current 18A, improve the iron content from 43.71wt% to 51.30wt%, reduce the phosphorus content from 0.93wt% to 0.66wt%.(2)Through single factor experiment to determine the optimal dispersant is hexametaphosphate, it can make the dispersion efficiency reach 85%. (3)We modified the common flocculant and get modified polyacrylamide, it can make pulp effective flocculation. After flocculation experiment iron increase to 51.94wt%, phosphorus drop to 0.44 wt%. (4)Through flotation experiment and get the best flotation condition, including inhibitors, activator, flotation agents and pH environment, etc. The final result of flotation experiment is iron increase to 55.54wt%, phosphorus content reduce to 0.420wt%, The iron content improved 12.71wt% compared with originally mine. The phosphorus content decreased 0.51wt%.
This experiment research three stages of mineral processing technology conditions got a kind of effective process method to high phosphorus hematite. It provides an effective means to China's future development of low-grade iron ore.
矿浆中加入分散剂之后,根据DLVO理论,矿浆颗粒之间的分散稳定性将取决于体系的范德华引力作用势能,水化排斥势能,空间位阻势能,双电层作用势能。絮凝步骤中絮凝剂选择性吸附带负电的矿物离子,使矿物颗粒聚沉,絮凝后得到粗精矿,再进一步通过反浮选能得到铁含量较高的精矿
本实验主要得出的结论包括：(1)通过强磁选实验确定最佳电流为18A,使铁品位由43.71wt%提高到51.30wt%,磷含量由0.93wt%降到0.66wt%。(2)通过单因素实验确定最佳分散剂为六偏磷酸钠,可使分散效果达到85%。(3)改性常用絮凝剂得到改性聚丙烯酰胺,可使矿浆有效絮凝。絮凝后铁品位提高至51.94wt%,磷降为0.44wt%。(4)改性浮选剂并得到最佳浮选条件,包括抑制剂,活化剂,浮选剂及pH环境等。反浮选最后的结果为铁品位55.54wt%,磷含量为0.420wt%,与原矿相比铁品位提高了12.71wt%,磷含量降低了0.51wt%。
本实验通过对选矿过程三个环节工艺条件的研究得到一种有效处理高磷赤铁矿的工艺方法。对我国未来开发低品位铁矿提供了一种有效手段。
This research take the hematite with high phosphorus in Western Hubei as research subject. The composition of this oolitic hematite mineral is very complex, embedded cloth very fine, impurities content such as phosphorus、aluminum、silicon are high, belong to those kind of iron ore that extremely difficult to choose from. Due to the fine mineral particles prone to mutual solidarity and slime cover, causing the deterioration of the final flotation. It should be adopted dispersed-selective flocculation-flotation method to achieve reduced phosphorus and increased iron。
After added disperse agent, in the DLVO theory, dispersion stability of the pulp system is decided by Vander Waal force potential energy, space resistance potential energy and double-electrodes layer potential energy. In the flocculation step, flocculant selective absorption of mineral negatively charged ions, get the mineral grains to sink, flocculation resulting concentrate and through the further reverse flotation can get a high iron content of concentrates.
The conclusion of this experiment mainly include:(1)By strong magnetic separation experiments to determine the optimal current 18A, improve the iron content from 43.71wt% to 51.30wt%, reduce the phosphorus content from 0.93wt% to 0.66wt%.(2)Through single factor experiment to determine the optimal dispersant is hexametaphosphate, it can make the dispersion efficiency reach 85%. (3)We modified the common flocculant and get modified polyacrylamide, it can make pulp effective flocculation. After flocculation experiment iron increase to 51.94wt%, phosphorus drop to 0.44 wt%. (4)Through flotation experiment and get the best flotation condition, including inhibitors, activator, flotation agents and pH environment, etc. The final result of flotation experiment is iron increase to 55.54wt%, phosphorus content reduce to 0.420wt%, The iron content improved 12.71wt% compared with originally mine. The phosphorus content decreased 0.51wt%.
This experiment research three stages of mineral processing technology conditions got a kind of effective process method to high phosphorus hematite. It provides an effective means to China's future development of low-grade iron ore.
引文
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[22]曹文仲,钟宏,田伟威等.赤泥矿物表面电性与高分子官能团选择絮凝[J].有色金属,2002,31(3)：57-60.
[23]Harris E, Svensson U. Plant practice of the column floatation machine for mentallic nonmetallic and coal floatation[J]. Column Floatation,1990,29(3):195～ 201.
[24]Green E W, Duke J B. Selective froth Flotation of ultrafine minerals or slimev[J]. Minerals Engineering,1962, (14):51～55.
[25]Fuerstenau D W. Physical aspects of fine particle flotation[J]. Principles of mineral flotation,1984,329～335.
[26]Misra M, Smith R W, Dubel J, et al. Biofloculation of finely divided minerals Bioproeessing[J], Minerals Engineering,1991, (5):90～103.
[27]牛福生,于洋,李久凤等.鲕状赤铁矿细微颗粒的分散行为研究[J].中国矿业2008，10.
[28]Yuzhang, Mamoun Muhammed. The Removal of Phosphcus from Ironore by Leaching with Nitric Acid, rometallurgy,1998,21:255～275
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[30]叶卉,孙锡丽.进口铁矿石现状分析及策略研究[J].金属矿山,2008(9)：7-10(154).
[31]松权衡,刘忠,杨复顶等.国内外铁矿资源简介[J].吉林地质,2008,27(3)：5-7 (12)
[32]马建明,吴初国.对我国低品位铁矿资源开发利用的思考[J].国土资源情报,2008,2：27-28.
[33]赵海燕.我国铁矿资源节约利用剖析[J].矿产保护与利用,2007(3)：6-9.
[34]葛英勇,陈达,余永富.脱硅耐低温捕收剂GE-609的浮选性能研究.武汉理工大学学报,2005,27(8)：17-19.
[35]程裕淇,赵一鸣,陆松年.中国几组主要铁矿类型[N].地质学报,1978.(4)：253-267.
[36]李桂玲,邹本利.“宁乡式”铁矿的选矿与利用研究[J].应用技术,2007.(4)：191-193.
[37]胡起生,朱曾汉.湖北省铁矿资源的可供性研究[J].资源环境与工程,2006,20(4)：341-347.
[38]彭会清,王代军.高效环保节约和谐开发鄂西高磷铁矿综述[J].矿业快报,2007(3)：7-9.
[39]余永富.国内外铁矿选矿技术进展[J].矿业工程,2004,2(5)：25-29.
[40]Kretzschmar ruben. Transport of humicoated iron oxide colloids in a sandy soil: Influence of Ca2+ and trace metals. Environmental Science&Technology,1997,31 (12): 349～350.
[41]Xia DK, Pickles CA. Caustic roasting and leaching of electric arcfurnace dust. Canadian Metallurgical Quarterly,1999,38 (3):175～186.
[42]Turner Laurie J, Kramer James R.Irreversibility of sulfate sorption on goethite and hematite. Water Air Soil Pollution,1992,63(1):23～32.
[43]Singh DB. Use of hematite for chromium (VI) removal. Journal of Environmental Science Health Part A,1993,28(8):1813～1826.
[44]代淑娟,魏德洲,丁亚卓等.废啤酒酵母溶解相对赤铁矿的抑制作用.
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[2]童雄,黎应书,周庆华等.难选鲕状赤铁矿石的选矿新技术试验[J].研究中国工程科学,2005,7(增刊)：323-326.
[3]张径生.我国铁矿资源开发利用现状及发展趋势[J].钢铁,2007.(2)：1-6.
[4]松权衡,刘忠,杨复顶,等.国内外铁矿资源简介[J].吉林地质,2008,27(3)：5,7(12)
[5]程裕淇,赵一鸣,陆松年.中国几组主要铁矿类型[N].地质学报,1978.(4)：253-267.
[6]李桂玲,邹本利.“宁乡式”铁矿的选矿与利用研究[J].应用技术,2007.(4)：191-193
[7]胡起生,朱曾汉.湖北省铁矿资源的可供性研究[J].资源环境与工程,2006,20(4)：341-347.
[8]刘万峰,陈金中,李成必等.湖北巴东鲕状赤铁矿选矿试验研究[J].有色金属,2008(2)：9-12.
[9]王颖.我国铁矿资源形势分析与其可持续供给的策略[J].金属矿山,2008(1)：12-14.
[10]E.C.道林等,用浮选柱反浮选铁矿的研究国外金属矿选矿[J].金属矿山,2000,37(2)；33-36.
[11]Crozier R D. Flotation:theory Reagents and Ore Testing[J].1992, (6):112～114.
[12]李维兵,宋仁峰,刘华艳,等.我国难选铁矿石选矿技术进步评述[J].金属矿山,2008(11)：1-4.
[13]纪军.高磷铁矿石脱磷技术研究[J].矿冶,2003(2)：33-37.
[14]朱玉霜,朱建光.浮选药剂的化学原理[M].湖南：中南工业大学出版社
[15]邓玉珍.选矿药剂概论[M].冶金工业出版社.
[16]徐晓军,牛福省,宫磊.我国浮选机研究现状与发展趋势[J].云南冶金,2002,31(3)：57-60.
[17]王淀佐.浮选剂作用原理及应用[M].冶金工业出版社.
[18]刘静,张建强,刘炯天.铁矿浮选药剂现状综述[J].中国矿业,2007,16(2)106-108.
[19]Liu P. Polymer modified clay minerals:Are View[J]. Applied Clay Science,2007, (38):1～13.
[20]刘方,印万忠,李艳军,等.新有机药剂对Ca2+活化后赤铁矿浮选行为的影响[J].中国非金属矿工业导刊,2007(64)：136-38.
[21]马松勃,韩跃新,杨小生等.不同种类淀粉对赤铁矿抑制效果的研究[J].有色矿冶,2006，22(5)：23-25.
[22]曹文仲,钟宏,田伟威等.赤泥矿物表面电性与高分子官能团选择絮凝[J].有色金属,2002,31(3)：57-60.
[23]Harris E, Svensson U. Plant practice of the column floatation machine for mentallic nonmetallic and coal floatation[J]. Column Floatation,1990,29(3):195～ 201.
[24]Green E W, Duke J B. Selective froth Flotation of ultrafine minerals or slimev[J]. Minerals Engineering,1962, (14):51～55.
[25]Fuerstenau D W. Physical aspects of fine particle flotation[J]. Principles of mineral flotation,1984,329～335.
[26]Misra M, Smith R W, Dubel J, et al. Biofloculation of finely divided minerals Bioproeessing[J], Minerals Engineering,1991, (5):90～103.
[27]牛福生,于洋,李久凤等.鲕状赤铁矿细微颗粒的分散行为研究[J].中国矿业2008，10.
[28]Yuzhang, Mamoun Muhammed. The Removal of Phosphcus from Ironore by Leaching with Nitric Acid, rometallurgy,1998,21:255～275
[29]Yoshida K. Development of New Hot Metal Dephosphorization Process at Kashima Steel Works [J]. Steel Times International,1990,14 (3):20～22.
[30]叶卉,孙锡丽.进口铁矿石现状分析及策略研究[J].金属矿山,2008(9)：7-10(154).
[31]松权衡,刘忠,杨复顶等.国内外铁矿资源简介[J].吉林地质,2008,27(3)：5-7 (12)
[32]马建明,吴初国.对我国低品位铁矿资源开发利用的思考[J].国土资源情报,2008,2：27-28.
[33]赵海燕.我国铁矿资源节约利用剖析[J].矿产保护与利用,2007(3)：6-9.
[34]葛英勇,陈达,余永富.脱硅耐低温捕收剂GE-609的浮选性能研究.武汉理工大学学报,2005,27(8)：17-19.
[35]程裕淇,赵一鸣,陆松年.中国几组主要铁矿类型[N].地质学报,1978.(4)：253-267.
[36]李桂玲,邹本利.“宁乡式”铁矿的选矿与利用研究[J].应用技术,2007.(4)：191-193.
[37]胡起生,朱曾汉.湖北省铁矿资源的可供性研究[J].资源环境与工程,2006,20(4)：341-347.
[38]彭会清,王代军.高效环保节约和谐开发鄂西高磷铁矿综述[J].矿业快报,2007(3)：7-9.
[39]余永富.国内外铁矿选矿技术进展[J].矿业工程,2004,2(5)：25-29.
[40]Kretzschmar ruben. Transport of humicoated iron oxide colloids in a sandy soil: Influence of Ca2+ and trace metals. Environmental Science&Technology,1997,31 (12): 349～350.
[41]Xia DK, Pickles CA. Caustic roasting and leaching of electric arcfurnace dust. Canadian Metallurgical Quarterly,1999,38 (3):175～186.
[42]Turner Laurie J, Kramer James R.Irreversibility of sulfate sorption on goethite and hematite. Water Air Soil Pollution,1992,63(1):23～32.
[43]Singh DB. Use of hematite for chromium (VI) removal. Journal of Environmental Science Health Part A,1993,28(8):1813～1826.
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