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[1]张稼祥,徐玲玲.EDTA对脱硫石膏制备α-半水石膏晶体生长的影响[J].南京工业大学学报(自然科学版),2018,40(02):90-94.[doi:10.3969/j.issn.1671-7627.2018.02.015]
 ZHANG Jiaxiang,XU Lingling.Effects of EDTA on crystal growth of α-hemihydrate gypsum prepared by flue gas desulphurization gypsum[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(02):90-94.[doi:10.3969/j.issn.1671-7627.2018.02.015]
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EDTA对脱硫石膏制备α-半水石膏晶体生长的影响()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
40
期数:
2018年02期
页码:
90-94
栏目:
出版日期:
2018-03-20

文章信息/Info

Title:
Effects of EDTA on crystal growth of α-hemihydrate gypsum prepared by flue gas desulphurization gypsum
文章编号:
1671-7627(2018)02-0090-05
作者:
张稼祥1徐玲玲12
1.南京工业大学 材料科学与工程学院,江苏 南京 210009; 2.江苏先进生物与化学制造协同创新中心,江苏 南京 210009
Author(s):
ZHANG Jiaxiang1XU Lingling12
1.College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China; 2.Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing 210009,China
关键词:
脱硫石膏 α-半水石膏 EDTA 晶体形貌
Keywords:
flue gas desulfurization gypsum α-hemihydrate gypsum EDTA crystal morphology
分类号:
TQ177.3
DOI:
10.3969/j.issn.1671-7627.2018.02.015
文献标志码:
A
摘要:
采用常压盐溶液法工艺以脱硫石膏为原料制备α-半水石膏,研究乙二胺四乙酸(EDTA)对脱水反应速率、产物晶体形貌的影响,并结合多种分析手段从微观角度对转晶机制进行探讨。结果表明:EDTA能显著降低脱硫石膏脱水反应速率,在0.2%~1.0%掺量下,脱水反应时间逐渐延长至4 h; EDTA对α-半水石膏晶体形貌改善作用明显,使之由细长的针棒状转变为短柱状,在1.0%掺量下晶体长径比约为1.5:1; EDTA在晶体生长过程中会吸附在(111)晶面上,阻碍半水石膏晶体在c轴方向上的生长,但并未掺杂在产物石膏晶格中,不会改变晶体的晶型。
Abstract:
Alpha hemihydrate gypsum was prepared from flue gas desulphurization(FGD)gypsum by hydrothermal method in salt solution at mospheric pressure.The effect of ethylene diamine tetraacetic acid(EDTA)on the dehydration rate and crystal morphology of the products was investigated,and the related mechanism of crystal modifying was discussed by various analysis means from the microscopic view.Results showed that the dehydration rate of FGD gypsum decreased with the incorporation of EDTA,and the dehydration time was gradually extended to 4 h under the dosage of EDTA from 0.2% to 1%.With the addition of EDTA,the morphology of α-hemihydrate gypsum was modulated from acicular to short columnar crystals,and the crystal length diameter ratio was 1.5:1 at the dosage of 1%.EDTA could absorb on the crystal face(111)of the α-hemihydrate gypsum,and inhibit the growth on the c-axis direction,but not dopein the gypsum lattice of the product,and the type of crystals was not affected.

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备注/Memo

备注/Memo:
收稿日期:2016-07-02
作者简介:张稼祥(1990—),男,河南三门峡人,硕士,主要研究方向为高强石膏材料; 徐玲玲(联系人),教授,E-mail:xll@njtech.edu.cn.
引用本文:张稼祥,徐玲玲.EDTA对脱硫石膏制备α-半水石膏晶体生长的影响[J].南京工业大学学报(自然科学版),2018,40(2):90-94..
更新日期/Last Update: 2018-03-30