%0 Journal Article
%T Recovery of RE from Weishan Rare Earth Concentrate with Chlorination Roasting after Fluorine-fixing Treatment<br>微山稀土精矿经固氟后采用氯化铵法回收稀土
%A SHI Wen-zhong
%A ZHU Guo-cai
%A ZHANG Zhi-geng
%A WANG Jing-yan
%A CHI Ru-an
%A <br>时文中，朱国才，张志庚，王竞研，池汝安
%J 过程工程学报
%D 2002
%I 
%X A process for recovery of RE from the Weishan rare earth concentrate was developed by incorporation of fluorine-fixing and RE concentrate chlorinating with ammonium chloride. The suitable conditions were determined as follows: Fluorine-fixing time of 50 min, MgO dosage mMgO/more=1:20 at 550oC. Chlorinating the fluorine-fixed calcine by 60 min, with NH4Cl dosage mNH4Cl/more=1.2:1 at 480oC, the leaching recovery of RE reaches 87.8% under the above conditions. The possible reactions in the fluorine-fixing process were discussed with the X-ray diffraction spectrum.
%K rare earth
%K concentrate
%K fluorine fixing
%K NH4Cl roasting treatment<br>回收
%K 稀土
%K 稀土精矿
%K 固氟
%K 氯化铵焙烧法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=22433E9F2622A896&yid=C3ACC247184A22C1&vid=0B39A22176CE99FB&iid=B31275AF3241DB2D&sid=C81D738643975BB0&eid=652E7E360EBE3082&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=6&reference_num=15