为提高铬铁粉矿中的铬铁比,依据选择性碳热还原原理,利用微波对南非铬铁粉矿进行加热还原,然后用稀盐酸对其浸取,最后进行过滤分离,得到高铬铁比的铬铁精矿.研究工艺参数,如还原剂的用量、还原温度和时间等因素对铬铁矿还原酸浸后铁和铬浸取率的影响.结果表明:当还原剂用量为6.0 g,还原温度为(1100±25)℃,还原时间为(20±2) min时,100 g铬铁粉矿经还原酸浸后,其铬铁比由1.4~1.6升至2.6~3.2.同时,对酸液中浸出的铁进行了回收,获得副产品氧化铁红.
@@@@In order to raise the ratio of chromium to iron in chromite fines, chromite fines from South Africa were reduced selectively by microwave heating based on the principle of selective carbothermic reduction of chromite. Then, chromite fines were submerged in dilute hydrochloric acid. Finally, chromite concentrate was obtained by filtration separation and the ratio of chromium to iron in chromite fines increased. The influences of technical parameters, such as the amount of reducing agent, reducing temperature and time, on leaching rates of iron and chromium were investigated through single factor experiments. The results show that, after chromite fines(100 g) treated with reduction and acid leaching, the ratio of chromium to iron increases from 1.4?1.6 to 2.6?3.2, under the optimal conditions of the dosage of reducing agent 6.0 g, reducing temperature (1 100±25)℃and reducing time (20±2) min. Iron in dilute acid solution was recovered and a by-product of iron oxide was obtained.
参考文献
| [1] | 阎江峰;陈加希;胡亮.铬冶金[M].北京:冶金工业出版社,2007:46-47. |
| [2] | NAFZIGER R H .A review of the deposits and beneficiation of lower-grade chromite[J].JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY,1982,82(08):205-226. |
| [3] | Y. Rama Murthy;Sunil Kumar Tripathy;C. Raghu Kumar .Chrome ore beneficiation challenges & opportunities – A review[J].Minerals Engineering,2011(5):375-380. |
| [4] | CURR T R;NELSON L R;MCRAE L B.The selective carbothermic reduction of chromite[A].Beijing,China:CSM,1998:158-170. |
| [5] | HAQUE K E .Microwave energy for mineral treatment processes-A brief review[J].International Journal of Mineral Processing,1999,57(01):1-24. |
| [6] | S.W.Kingman N.A.Rowson .Microwave treatment of minerals-a review[J].Minerals Engineering,1998(11):1081-1087. |
| [7] | Morteza Oghbaei;Omid Mirzaee .Microwave versus conventional sintering: A review of fundamentals, advantages and applications[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1/2):175-189. |
| [8] | FORD J D;PEI D C T .High temperature chemical processing via microwave absorption[J].Journal of Microwave Power,1967,2(02):61-64. |
| [9] | M. Al-Harahsheh;S.W. Kingman .Microwave-assisted leaching--a review[J].Hydrometallurgy,2004(3/4):189-203. |
| [10] | Michail Samouhos;Maria Taxiarchou;Ron Hutcheon.Microwave reduction of a nickeliferous laterite ore[J].Minerals Engineering,2012:19-29. |
| [11] | 雷鹰,李雨,彭金辉,张利波,郭胜惠.微波选择性加热在矿冶过程中的应用进展[J].材料导报,2011(15):119-122. |
| [12] | 刘能生,彭金辉,张利波,张泽彪.微波技术在稀贵金属冶金中的研究应用进展[J].贵金属,2009(04):48-51,62. |
| [13] | 彭元东,易健宏,罗述东,李丽娅,陈刚,冉俊铭.微波技术在金属材料制备中的应用现状[J].稀有金属材料与工程,2009(04):742-747. |
| [14] | 杜军;王娜;刘作华;于鲸 陶长元 .微波加热在冶金工业中的应用[J].中国稀土学报,2010,28:448-452. |
| [15] | 余文华.微波加热在钒钛磁铁矿冶金领域应用的研究进展[J].钢铁钒钛,2011(03):87-96. |
| [16] | 刘书祯,白燕,程艳明,钟文.微波技术在冶金中的应用[J].湿法冶金,2011(02):91-94. |
| [17] | 张小云,覃文庆,田学达,陈燕波,谷雨,习晓光.石煤微波空白焙烧-酸浸提钒工艺[J].中国有色金属学报,2011(04):908-912. |
| [18] | 黄生祥,齐伟,周克省,秦宪明,陈颖,邓联文,夏辉,韩建华.La1-xKxMnO3的微波吸收特性[J].中国有色金属学报,2012(02):448-452. |
| [19] | 冯秀梅,陈津,李宁,崔慧军,刘金营.微波场中铬铁矿粉电磁特性研究[J].矿物学报,2006(04):363-367. |
| [20] | 崔慧军,陈津,刘金营.微波场中含碳铬铁矿粉反应过程升温特性数值模拟[J].钢铁研究学报,2007(11):5-9. |
| [21] | LI Ning,CHEN Jin,YAN Hong,FENG Xiu-mei,CUI Hui-jun,LIU Jin-ying.Temperature Rise Characteristics of Carbon-Containing Chromite Ore Fines in Microwave Field[J].钢铁研究学报（英文版）,2008(01):1-5. |
| [22] | 叶大伦;胡建华.实用无机物热力学数据手册[M].北京:冶金工业出版社,2002 |
| [23] | 李宁 .含碳铬铁矿粉微波加热体还原热力学及动力学研究[D].太原理工大学,2007. |
| [24] | 刘岩;姜茂发.转炉铬矿熔融还原法不锈钢直接合金化技术[M].沈阳:东北大学出版社,2009:41-52. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%