Roasting decomposition of mixed rare earth tailings by CaO in reducing atmosphere
查看参考文献15篇
|
文摘
|
In Baotou rare earth tailings ore, the grade of rare earth is close to that of the raw ore nearly. The rare earths are discarded in tailings dam caused by a serious waste of resources. First of all, the decomposition products of bastnaesite-and monazite-mixed rare earth tailings in CaO in reducing atmosphere were studied by means of X-ray diffraction (XRD). The results show that the normal products are CeO_2, Ce_2 O_3, Ca_5 F(PO_4)_3, and Ce_(0.75)Nd_(0.25)O_(1.875), and there are no REPO_4 and REFCO_3. Secondly, the roasted product was extracted in HCl, and the relationship among roasting time, roasting temperature, CaO addition, and extraction temperature was studied by the quadratic regression-orthogonal analysis. Through analysis, the optimum process conditions of mixed rare earth tailings extracted are obtained as follows: roasting time of 60 min, roasting temperature of 800 °C, CaO addition of 30 %, extraction temperature of 80 °C, and extraction ratio of 99.18 %. |
|
来源
|
Rare Metals
,2017,36(9):764-768 【核心库】
|
|
DOI
|
10.1007/s12598-014-0399-8
|
|
关键词
|
Mixed rare earth tailings
;
Reducing roasting
;
Leaching ratio
|
|
地址
|
School of Materials and Metallurgy, Northeastern University, Institute of Metallurgy Resources and Environmental Engineering, Shenyang, 110004
|
|
语种
|
英文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1001-0521 |
|
学科
|
矿业工程 |
|
基金
|
supported by the Development Program of National Key Basic Research
|
|
文献收藏号
|
CSCD:6084545
|
参考文献 共
15
共1页
|
|
1.
Wu W Y. Reaction process of monazite and bastnaesite mixed rare earth minerals calcined by CaO-NaCl-CaCl_2.
Trans Nonferr Met Soc China,2007,17(4):864
|
被引
18
次
|
|
|
|
|
2.
Wu W Y. Reaction mechanism of synthetic monazite decomposed by CaO.
J Northeastern Univ Nat Sci,2002,23(12):1158
|
被引
2
次
|
|
|
|
|
3.
Chen J Z. Making national multipurpose use of resources of resources of RE in Baiyunebo deposit.
Chin Rare Earths,2007,28(1):70
|
被引
2
次
|
|
|
|
|
4.
Chen Y. Beneficiation of a complex niobium ore containing rare earths and zirconium.
Chin J Rare Met,2013,37(3):436
|
被引
1
次
|
|
|
|
|
5.
Yu Y F. The meaning of comprehensive utilization of rare earth and niobium resources from Baiyunebo mine is significant.
Rare Earth Inf,2007,28(8):8
|
被引
1
次
|
|
|
|
|
6.
Zhang Y. Study on rare earth flotation from Baogang tailings.
Chin Rare Earths,2010,31(2):93
|
被引
3
次
|
|
|
|
|
7.
Xu J Q. Flotation of bastnaesite and monazite in dressing plant tailing.
Chin Rare Earths,2006,27(5):67
|
被引
1
次
|
|
|
|
|
8.
Ye Z P. Recovery rare earth and niobium from ferromagnetic gangue using mineral processing.
Nonferr Metals (Mineral Processing Section),1996,48(6):1
|
被引
1
次
|
|
|
|
|
9.
Li Y X. Study on recovering rare earth minerals and niobium mineral from strongly magnetic tailings in Baotou Mineral Processing Plant.
J Guangdong Non-ferr Met,1999,9(2):10
|
被引
1
次
|
|
|
|
|
10.
Yu X L. New progress in comprehensive utilization of tailings in Baosteel's concentrator.
Multipurp Util Min Res,2007,28(3):32
|
被引
1
次
|
|
|
|
|
11.
Li Y. Leaching of rare earth and preparation of cryolite from Baotou magnetic tailings.
J Rare Earth,2012,30(6):251
|
被引
1
次
|
|
|
|
|
12.
Yu X L. Extraction of rare earths from Baogang tailings by carbochlorination reaction taking AlCl_3 as defluorinating agent.
Journal of Rare Earths,2006,27(4):30
|
被引
1
次
|
|
|
|
|
13.
Yu X L. Study on process of decomposition of Baosteel concentrator tailing by carbothermic chlorination.
Met Min,2007,37(9):113
|
被引
1
次
|
|
|
|
|
14.
Yu X L. Extraction of rare earths from Baotou Concentrating Mill's tailing by MgO-roasting and carbochlorination reaction.
J Chin Rare Earth Soc,2009,27(2):309
|
被引
2
次
|
|
|
|
|
15.
Wu W Y. Study on roasting decomposition of mixed rare earth concentrate in CaO-NaCl-CaCl_2.
J Rare Earths,2006,24(5):23
|
被引
16
次
|
|
|
|
|
了解气象卫星更多信息，请访问