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요약정보
磷石膏快速干法稳定化的矿物特征研究 / Study on mineral characteristics of phosphogypsum stabilized by rapid dry method
Resource Type
Academic Journal
Authors
彭晓曦
;
吴怡
;
黄祥
;
韩雨岐
;
张力
;
侯江
;
雍毅
;
PENG Xiaoxi
;
WU Yi
;
HUANG Xiang
;
HAN Yuqi
;
ZHANG Li
;
HOU Jiang
;
YONG Yi
Source
无机盐工业 / Inorganic Chemicals Industry
. 54(4):24-28
Subject
磷石膏稳定化;石灰;磷;氟
Language
Chinese
ISSN
1006-4990
Online Access
Find it @ DONGA
초록
新鲜磷石膏中的主要污染物种类为氟化物和磷化物,添加石灰能有效降低氟和磷的浸出水平,并且添加状态和比例对稳定化效果影响较大.通过添加不同石灰比例来稳定磷石膏的处理方式,研究其污染物的浸出水平,并采用扫描电镜及能谱对其进行表征.研究发现石灰与磷石膏拌混比例是污染物浸出水平的重要影响因素,在m(生石灰):m(新鲜磷石膏)为1:50~1:100时稳定化效果最好.由扫描电镜和能谱表征发现新鲜磷石膏为片层状结构堆叠,随着石灰添加量增多,表面微观结构也相应增多.在m(生石灰):m(新鲜磷石膏)为1:100时,磷石膏的片层状结构表面会形成棒状结构,棒状间隙存在微球状颗粒.根据表征结果推测片层状结构除CaSO4外,还含有一定量的Ca3(PO4)2,棒状结构为Al2O3和AlPO4,微球颗粒为CaF2.在新鲜磷石膏表面形成的这类微观结构,使得含氟和磷的污染物稳定化从而降低了浸出水平.
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