通过串联热-水工艺回收工业副产品石膏用作抹灰材料:去除杂质、提高白度和相演化的规律性

IF 2.7 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Journal of Material Cycles and Waste Management Pub Date : 2024-08-12 DOI:10.1007/s10163-024-02044-z
Zhengqiang Zheng, Changzhou Weng, Zeyu Kang, Minhua Zhong, Changyong Yu, Zhang Lin, Weizhen Liu
{"title":"通过串联热-水工艺回收工业副产品石膏用作抹灰材料:去除杂质、提高白度和相演化的规律性","authors":"Zhengqiang Zheng,&nbsp;Changzhou Weng,&nbsp;Zeyu Kang,&nbsp;Minhua Zhong,&nbsp;Changyong Yu,&nbsp;Zhang Lin,&nbsp;Weizhen Liu","doi":"10.1007/s10163-024-02044-z","DOIUrl":null,"url":null,"abstract":"<div><p>In China, large amounts of industrial byproduct gypsum (IBG) end up as waste and excessive stockpiling due to its low whiteness and high impurity content. In this study, two typical IBG including phosphogypsum (PG) and flue gas desulfurization gypsum (FGDG) were the research object. The impurities removal and the whiteness improvement by the tandem pyro-hydro process were investigated. Species of impurities, mechanism of whiteness improvement and the evolution of the gypsum phase during the tandem process were revealed. The results indicate that the impurities responsible for the poor whiteness of IBG included organic matter, carbon particles, and silicates. The temperature of the pyro process is the critical factor. The IBG is calcinated at 400–500 °C to fully remove organic matter and carbon particles, while decompose silicates to silica. Following, in the hydro step, the calcined IBG was treated with dilute sulfuric acid (0.2–1.0 M) to remove ion impurities such as Fe(III), the higher temperature and higher acidity are favorable to the production of valuable CaSO<sub>4</sub>. After treatment, the whiteness of IBG was improved from below 40% to above 80%, and the soluble impurity content can meet the standards. Moreover, both PG and FGDG products exhibited a compressive strength exceeding 10.0 MPa of curing for 7 d. This work provides theoretical guidance to promote the resource utilization of IBG, especially as plastering materials after purification and whitening.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Recycling industrial byproduct gypsum for use as plastering materials by the tandem pyro-hydro process: impurities removal, whiteness improvement, and regularity of phase evolution\",\"authors\":\"Zhengqiang Zheng,&nbsp;Changzhou Weng,&nbsp;Zeyu Kang,&nbsp;Minhua Zhong,&nbsp;Changyong Yu,&nbsp;Zhang Lin,&nbsp;Weizhen Liu\",\"doi\":\"10.1007/s10163-024-02044-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In China, large amounts of industrial byproduct gypsum (IBG) end up as waste and excessive stockpiling due to its low whiteness and high impurity content. In this study, two typical IBG including phosphogypsum (PG) and flue gas desulfurization gypsum (FGDG) were the research object. The impurities removal and the whiteness improvement by the tandem pyro-hydro process were investigated. Species of impurities, mechanism of whiteness improvement and the evolution of the gypsum phase during the tandem process were revealed. The results indicate that the impurities responsible for the poor whiteness of IBG included organic matter, carbon particles, and silicates. The temperature of the pyro process is the critical factor. The IBG is calcinated at 400–500 °C to fully remove organic matter and carbon particles, while decompose silicates to silica. Following, in the hydro step, the calcined IBG was treated with dilute sulfuric acid (0.2–1.0 M) to remove ion impurities such as Fe(III), the higher temperature and higher acidity are favorable to the production of valuable CaSO<sub>4</sub>. After treatment, the whiteness of IBG was improved from below 40% to above 80%, and the soluble impurity content can meet the standards. Moreover, both PG and FGDG products exhibited a compressive strength exceeding 10.0 MPa of curing for 7 d. This work provides theoretical guidance to promote the resource utilization of IBG, especially as plastering materials after purification and whitening.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":643,\"journal\":{\"name\":\"Journal of Material Cycles and Waste Management\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Material Cycles and Waste Management\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10163-024-02044-z\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Material Cycles and Waste Management","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s10163-024-02044-z","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

在中国,大量的工业副产石膏(IBG)因白度低、杂质含量高而成为废弃物和过量库存。本研究以磷石膏(PG)和烟气脱硫石膏(FGDG)这两种典型的工业副产石膏为研究对象。研究了串联热水解工艺去除杂质和提高白度的情况。揭示了串联工艺过程中的杂质种类、白度改善机理和石膏相的演变过程。结果表明,造成 IBG 白度差的杂质包括有机物、碳颗粒和硅酸盐。热解过程的温度是关键因素。IBG 在 400-500 °C 下煅烧,以完全去除有机物和碳颗粒,同时将硅酸盐分解为二氧化硅。然后,在水处理步骤中,用稀硫酸(0.2-1.0 M)处理煅烧过的 IBG,以除去离子杂质,如铁(III),较高的温度和较高的酸度有利于生产有价值的 CaSO4。处理后,IBG 的白度从 40% 以下提高到 80% 以上,可溶性杂质含量也能达标。此外,PG 和 FGDG 产品固化 7 d 的抗压强度均超过 10.0 MPa。这项工作为促进 IBG 的资源化利用,尤其是提纯增白后用作抹灰材料提供了理论指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Recycling industrial byproduct gypsum for use as plastering materials by the tandem pyro-hydro process: impurities removal, whiteness improvement, and regularity of phase evolution

In China, large amounts of industrial byproduct gypsum (IBG) end up as waste and excessive stockpiling due to its low whiteness and high impurity content. In this study, two typical IBG including phosphogypsum (PG) and flue gas desulfurization gypsum (FGDG) were the research object. The impurities removal and the whiteness improvement by the tandem pyro-hydro process were investigated. Species of impurities, mechanism of whiteness improvement and the evolution of the gypsum phase during the tandem process were revealed. The results indicate that the impurities responsible for the poor whiteness of IBG included organic matter, carbon particles, and silicates. The temperature of the pyro process is the critical factor. The IBG is calcinated at 400–500 °C to fully remove organic matter and carbon particles, while decompose silicates to silica. Following, in the hydro step, the calcined IBG was treated with dilute sulfuric acid (0.2–1.0 M) to remove ion impurities such as Fe(III), the higher temperature and higher acidity are favorable to the production of valuable CaSO4. After treatment, the whiteness of IBG was improved from below 40% to above 80%, and the soluble impurity content can meet the standards. Moreover, both PG and FGDG products exhibited a compressive strength exceeding 10.0 MPa of curing for 7 d. This work provides theoretical guidance to promote the resource utilization of IBG, especially as plastering materials after purification and whitening.

Graphical Abstract

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
5.30
自引率
16.10%
发文量
205
审稿时长
4.8 months
期刊介绍: The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles. The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management. The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).
期刊最新文献
Recovery of samarium and cobalt/iron oxide from SmCo magnets through acid baking and water leaching Lactic acid-fermented by-product of Shochu distillery reduces anxiety behavior in Neuropeptide Y knockout zebrafish by the regulation of isotoin neuron Circular economy in fashion: consumer awareness and lifestyle, and environmental impact on second-hand clothes Simulating the trajectory of conductive particles in positive high-voltage electrostatic separators and optimizing parameters Sustainable solution selection for solid waste incineration fly ash: a multicriteria framework based on objective weights and fusion ranks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1