高鈣水體對(duì)磁鐵礦浮選脫硫的影響機(jī)理與控制方法
[Abstract]:Sulfur in iron ore has a serious impact on the performance of its smelting products, so sulfur content is an important measure of iron concentrate quality, desulfurization is also a necessary process in the process of iron ore separation. The sulfur in iron ore is mainly pyrite, pyrrhotite and other metal sulfides, most of which are usually removed during magnetic separation, but highly magnetic pyrrhotite is easy to enter magnetic concentrate. Further flotation removal is often needed. The sulfur content of a high sulfur magnetite concentrate in Danfeng Shaanxi is 1.16 and the sulfur bearing mineral is pyrrhotite basically. It is still difficult to obtain ideal indexes by multiple separations in the process of flotation desulphurization. By analyzing the field influencing factors, it is found that there is a large amount of Ca ~ (2) in the water body and the dissolution of the calcium bearing minerals, which results in the high content of Ca ~ (2) in the slurry. It is suggested that Ca2 may affect the flotation performance of pyrrhotite and further affect the desulfurization effect of magnetite concentrate. This paper focuses on the problem of flotation desulfurization of magnetite in high calcium water. By means of solution chemical analysis and contact angle measurement, such as XPSG SEM-EDS and ICP-MS, the effect mechanism of Ca ~ (2) on the flotation characteristics of pyrrhotite is clarified. The suitable method to enhance the flotation desulfurization effect of magnetite in high calcium water was studied. The effect of Ca ~ (2) on the flotation behavior of pyrrhotite was investigated through the flotation test of pure minerals. It was found that the floatability of pyrrhotite in high calcium water was significantly reduced. Comparing the activation effect of copper sulfate with different Ca2 content, it is found that Cu2 has a serious effect on the activation of pyrrhotite. It is found that the activation effect of Cu2 on pyrrhotite is increased with the increase of Ca2 concentration. The adsorption of copper ions on the mineral surface was significantly reduced. SEM images showed that a large number of small white particles appeared on the surface of pyrrhotite in high calcium water. The results of EDS and XPS showed that the calcium content on the mineral surface increased significantly, while the contents of oxygen and sulfur also increased. It is concluded that Ca2 formed a layer of calcium sulfate hydrophilic film on the surface of pyrrhotite, and this layer formed a surface occupied position, which prevented the activation of pyrrhotite by Cu2. The influence of Ca ~ (2) was eliminated by complexing Ca ~ (2). The complexing agents such as ammonium nitrate, ammonium citrate and citric acid were tested respectively. It was found that citric acid complexed Ca ~ (2) was activated with copper sulfate, and the floatability of pyrrhotite was improved significantly. When the dosage of citric acid is 1 脳 10 ~ (-3) mol / L, the ratio of citric acid to copper sulfate is 1: 2, pH is 4-5, and the amount of Ding Ji xanthate is 1.2 脳 10 ~ (-4) mol / L, the recovery rate of pyrrhotite reaches 92.90%. The results show that Ca2 in citric acid complex slurry hinders the formation of CaSO4 hydrophilic film, and that Fe (OH) 3 produced by oxidation on pyrrhotite surface can be cleaned, thus effectively improving the activation effect of Cu2 on pyrrhotite. In the actual mineral test, when the amount of citric acid is 600g / t, the amount of copper sulfate is 200g / t, and the amount of Ding Ji xanthate is 120g/t, the TFE content in the iron concentrate is 67.28%, and the sulfur content is reduced from 1.16% to 0.14%. The research provides a new way to solve the problems related to pyrrhotite flotation, such as desulphurization of high sulfur magnetite.
【學(xué)位授予單位】:西安建筑科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TD923;TD951
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 崔毅琦,童雄,周慶華,何劍;國(guó)內(nèi)外磁黃鐵礦浮選的研究概況[J];金屬礦山;2005年05期
2 劉曉榮;姜圣才;;磁黃鐵礦和黃鐵礦的生物浸出研究[J];礦冶工程;2006年06期
3 李文娟;宋永勝;;磁黃鐵礦的浮選電化學(xué)及抑制劑研究概況[J];礦冶;2008年01期
4 趙開(kāi)樂(lè);顧幗華;李雙棵;;有菌和無(wú)菌體系下磁黃鐵礦氧化的電化學(xué)研究[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年10期
5 C.S.Stevens;高守仁;;德?tīng)柲崽氐V山含金磁黃鐵礦的處理[J];國(guó)外金屬礦選礦;1966年03期
6 候清瑜;磁黃鐵礦土法煉磺的幾點(diǎn)經(jīng)驗(yàn)[J];化工礦山技術(shù);1977年06期
7 侯清瑜;磁黃鐵礦的保護(hù)和使用[J];化工礦山技術(shù);1982年01期
8 郭昌槐,胡熙庚;金川磁黃鐵礦浮選特性的研究[J];礦冶工程;1983年01期
9 李達(dá)明,傅金寶,周衛(wèi)寧;廣西大廠錫礦田磁黃鐵礦的標(biāo)型特征及其地質(zhì)意義[J];礦產(chǎn)與地質(zhì);1987年01期
10 傅賢書,李東亮,黃瓊玉,張銀菊,傅文敏;天然磁黃鐵礦在重金屬?gòu)U水處理中的應(yīng)用[J];環(huán)境化學(xué);1991年05期
相關(guān)會(huì)議論文 前7條
1 何玉婷;汪靈;范博文;鄭紅霞;;基于黃鐵礦加熱變化過(guò)程的新生磁黃鐵礦特征及其生成途徑初探[A];2012年全國(guó)礦物科學(xué)與工程學(xué)術(shù)研討會(huì)論文集[C];2012年
2 馬賓;康明亮;劉春立;;磁黃鐵礦還原亞硒酸的動(dòng)力學(xué)及產(chǎn)物研究[A];第十一屆全國(guó)核化學(xué)與放射化學(xué)學(xué)術(shù)討論會(huì)論文摘要集[C];2012年
3 黃民智;唐紹華;黃許陳;張慎昭;;銅陵地區(qū)幾個(gè)銅礦床中磁黃鐵礦的成因和演化[A];中國(guó)地質(zhì)科學(xué)院文集(5)[C];1983年
4 李洪枚;柯家駿;;細(xì)菌浸出金川含鎳磁黃鐵礦混合精礦的研究[A];西部礦產(chǎn)資源開(kāi)發(fā)利用與保護(hù)學(xué)術(shù)會(huì)議論文集[C];2002年
5 王炬;;某進(jìn)口高硫磁鐵礦脫硫試驗(yàn)研究[A];2005年全國(guó)選礦高效節(jié)能技術(shù)及設(shè)備學(xué)術(shù)研討與成果推廣交流會(huì)論文集[C];2005年
6 宋亦軍;徐苓;;補(bǔ)充高鈣奶粉對(duì)青年女性的影響[A];中華醫(yī)學(xué)會(huì)第四次全國(guó)骨質(zhì)疏松和骨礦鹽疾病學(xué)術(shù)會(huì)議論文匯編[C];2006年
7 徐姝迪;丁紅;王忠;武璇;;高鈣飼料喂養(yǎng)初斷乳大鼠對(duì)肥胖誘導(dǎo)形成的影響[A];中國(guó)西部第六屆營(yíng)養(yǎng)與健康學(xué)術(shù)會(huì)議論文集[C];2011年
相關(guān)重要報(bào)紙文章 前6條
1 李響;老年人補(bǔ)鈣不必選“高鈣奶”[N];中國(guó)中醫(yī)藥報(bào);2007年
2 常賓;買牛奶不必選“高鈣”[N];健康時(shí)報(bào);2007年
3 劉健;不要給孩子喝高鈣奶[N];衛(wèi)生與生活報(bào);2006年
4 唐夏;不必專選高鈣奶[N];中國(guó)消費(fèi)者報(bào);2007年
5 湘雅醫(yī)院 李惠明;高鈣食物可防卵巢癌[N];大眾衛(wèi)生報(bào);2009年
6 諸新月;高鈣奶更能補(bǔ)鈣嗎[N];醫(yī)藥養(yǎng)生保健報(bào);2008年
相關(guān)博士學(xué)位論文 前4條
1 馬英強(qiáng);基于晶體化學(xué)的硫化鐵礦浮選特性研究[D];東北大學(xué);2013年
2 鄭曉冬;富硫磁黃鐵礦的儲(chǔ)鋰電化學(xué)行為及改性處理研究[D];青島科技大學(xué);2017年
3 黃紅軍;低活性難選硫鐵礦高效活化應(yīng)用基礎(chǔ)研究[D];中南大學(xué);2011年
4 蔣磊;氧化亞鐵硫桿菌對(duì)黃鐵礦、黃銅礦、磁黃鐵礦和方鉛礦的生物氧化作用研究[D];中國(guó)科學(xué)院研究生院(廣州地球化學(xué)研究所);2006年
相關(guān)碩士學(xué)位論文 前10條
1 高珂;高鈣水體對(duì)磁鐵礦浮選脫硫的影響機(jī)理與控制方法[D];西安建筑科技大學(xué);2017年
2 洪秋陽(yáng);磁黃鐵礦晶體化學(xué)和可浮性研究[D];中南大學(xué);2011年
3 高文元;攀枝花釩鈦磁鐵礦蘭家火山礦段金屬硫化物的成因礦物學(xué)研究[D];東北大學(xué);2014年
4 宋艷玲;天然磁黃鐵礦修飾微生物燃料電池陰極并應(yīng)用于含鉻(Ⅵ)廢水處理的研究[D];內(nèi)蒙古大學(xué);2016年
5 鐘洪皓;提高銅鋅多金屬硫化礦分選效果試驗(yàn)研究[D];遼寧工程技術(shù)大學(xué);2015年
6 劉佳;Fe-S系列礦物結(jié)構(gòu)特征及變化規(guī)律研究[D];東北大學(xué);2014年
7 趙開(kāi)樂(lè);磁黃鐵礦微生物浸出機(jī)理研究[D];中南大學(xué);2010年
8 何玉婷;基于黃鐵礦加熱變化過(guò)程中新生磁黃鐵礦特征及其生成途徑[D];成都理工大學(xué);2013年
9 李寧;磁黃鐵礦對(duì)錸的還原固定及其影響因素研究[D];太原科技大學(xué);2014年
10 朱曉;多級(jí)孔結(jié)構(gòu)化磁黃鐵礦材料制備及除磷性能[D];合肥工業(yè)大學(xué);2015年
,本文編號(hào):2130619
本文鏈接:http://sikaile.net/kejilunwen/kuangye/2130619.html