镍铁渣硫酸浸出渣制备硅酸盐水泥熟料工艺研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (10): 3703-3709.

镍铁渣硫酸浸出渣制备硅酸盐水泥熟料工艺研究

高锋, 梁振佳, 雷西虎, 张博, 廖国安, 王欣鹏

广西大学资源环境与材料学院,省部共建特色金属材料与组合结构全寿命安全国家重点实验室,有色金属及材料加工新技术教育部重点实验室,南宁 530004

收稿日期:2023-05-25 修订日期:2023-08-04 出版日期:2023-10-15 发布日期:2023-10-17
作者简介:高锋(1976—),男,博士,副教授。主要从事有色金属合金和固废资源化利用的研究。E-mail:gaofeng@gxu.edu.cn
基金资助:
大学生创新创业训练计划(S202210593324);广西自然科学基金(2023GXNSFAA026372);广西有色金属及特色材料加工重点实验室开放基金(GXYSSF1802)

Process of Silicate-Cement Clinker Prepared by Sulfuric Acid Leaching Ferronickel Slag

GAO Feng, LIANG Zhenjia, LEI Xihu, ZHANG Bo, LIAO Guoan, WANG Xinpeng

State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China

Received:2023-05-25 Revised:2023-08-04 Online:2023-10-15 Published:2023-10-17

摘要/Abstract

摘要： 以镍铁渣硫酸浸出渣为原料制备硅酸盐水泥熟料,研究不同石灰饱和系数和不同焙烧温度对硅酸盐水泥熟料物相结构与微观形貌的影响。通过测定熟料中f-CaO浓度来判断水泥熟料的易烧性,通过XRD、EDS、SEM分析熟料的物相结构、元素分布及微观形貌。结果表明,焙烧温度越高,f-CaO浓度越低,易烧性越好。当焙烧温度为1 350 ℃时,硅酸盐水泥熟料焙烧后出现了粉化现象且未形成C₃S相;而当1 400 ℃焙烧时,硅酸盐水泥熟料中出现了以C₂S和C₃S为主的晶相,未出现粉化现象;当焙烧温度达到1 450 ℃时,水泥相晶粒组织发育比较充分。该熟料与石膏混合制成水泥,其水泥砂浆的水化产物经28 d养护后抗压和抗折强度分别为37.34和7.01 MPa。

关键词: 镍铁渣, 硅酸盐水泥, 熟料, 高温焙烧, 易烧性, f-CaO

Abstract: The silicate-cement clinker was prepared by sulfuric acid leaching ferronickel slag, and the effects of various temperatures and limestone saturation coefficients on the structure and microscopic morphology of the clinker were investigated. The burnability of the cement clinker was judged by the determination of f-CaO content in the clinker, and the phase structure, elemental distribution and microscopic morphology of the clinker were analyzed by XRD, EDS and SEM. The results show that the higher the calcination temperature is, the lower the f-CaO concentration is, and the better the burnability is. When the sintering temperature is 1 350 ℃, the Portland cement clinker appears pulverizationand does not form C₃S phase after sintering. However, when the calcination temperature is 1 400 ℃, the crystal phase dominated by C₂S and C₃S appears in the Portland cement clinker, and pulverization not occurs. When the sintering temperature reaches 1 450 ℃, the cement phase grain structure is fully developed. After the clinker is mixed with gypsum to make cement, the compressive strength and flexural strength of the hydration products of cement mortar after 28 d curing are 37.34 and 7.01 MPa, respectively.

Key words: ferronickel slag, silicate-cement, clinker, high-temperature sintering, burnability, f-CaO

中图分类号:

TQ172

高锋, 梁振佳, 雷西虎, 张博, 廖国安, 王欣鹏. 镍铁渣硫酸浸出渣制备硅酸盐水泥熟料工艺研究[J]. 硅酸盐通报, 2023, 42(10): 3703-3709.

GAO Feng, LIANG Zhenjia, LEI Xihu, ZHANG Bo, LIAO Guoan, WANG Xinpeng. Process of Silicate-Cement Clinker Prepared by Sulfuric Acid Leaching Ferronickel Slag[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(10): 3703-3709.

参考文献

[1] 朱德庆, 田宏宇, 潘建, 等. 低品位红土镍矿综合利用现状及进展[J]. 钢铁研究学报, 2020, 32(5): 351-362.
ZHU D Q, TIAN H Y, PAN J, et al. Comprehensive utilization status and progress of low-grade laterite nickel ore[J]. Journal of Iron and Steel Research, 2020, 32(5): 351-362 (in Chinese).
[2] CHO B S, KIM Y U, KIM D B, et al. Effect of ferronickel slag powder on microhydration heat, flow, compressive strength, and drying shrinkage of mortar[J]. Advances in Civil Engineering, 2018, 2018: 1-7.
[3] 吴春丽, 谢红波, 陈哲, 等. 镍铁渣资源化综合利用现状研究[J]. 广东建材, 2019, 35(6): 77-79.
WU C L, XIE H B, CHEN Z, et al. Study on the present situation of comprehensive utilization of ferronickel slag as resources[J]. Guangdong Building Materials, 2019, 35(6): 77-79 (in Chinese).
[4] 李小明, 沈苗, 王翀, 等. 镍渣资源化利用现状及发展趋势分析[J]. 材料导报, 2017, 31(5): 100-105.
LI X M, SHEN M, WANG C, et al. Current situation and development of comprehensive utilization of nickel slag[J]. Materials Review, 2017, 31(5): 100-105 (in Chinese).
[5] 李沙, 代文彬, 潘德安, 等. 镍铁渣用于水泥及混凝土的资源化研究综述[J]. 硅酸盐通报, 2019, 38(6): 1764-1768.
LI S, DAI W B, PAN D A, et al. Study on utilization of ferronickel slag in cement and concrete: a review[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(6): 1764-1768 (in Chinese).
[6] 肖忠明, 王昕, 霍春明, 等. 镍渣水化特性的研究[J]. 广东建材, 2009, 25(9): 9-12.
XIAO Z M, WANG X, HUO C M, et al. Study on hydration characteristics of nickel slag[J]. Guangdong Building Materials, 2009, 25(9): 9-12 (in Chinese).
[7] 娄广辉, 李银保, 符晓, 等. 镍铁渣的基本特性及其制备高强砖的研究[J]. 新型建筑材料, 2018, 45(6): 122-126.
LOU G H, LI Y B, FU X, et al. Basic characteristics of ferronickel slag and the preparation of high-strength brick[J]. New Building Materials, 2018, 45(6): 122-126 (in Chinese).
[8] RAWLINGS R D, WU J P, BOCCACCINI A R. Glass-ceramics: their production from wastes: a review[J]. Journal of Materials Science, 2006, 41(3): 733-761.
[9] 南雪丽, 卢学峰, 傅希圣. 利用复合工业废渣制备CaO-MgO-Al₂O₃-SiO₂微晶玻璃[J]. 有色金属, 2011, 63(1): 118-122.
NAN X L, LU X F, FU X S. Preparation of glass-ceramics of CaO-MgO-Al₂O₃-SiO₂ with composite industrial residue[J]. Nonferrous Metals, 2011, 63(1): 118-122 (in Chinese).
[10] GAO F, HUANG Z C, LI H, et al. Recovery of magnesium from ferronickel slag to prepare hydrated magnesium sulfate by hydrometallurgy method[J]. Journal of Cleaner Production, 2021, 303: 127049.
[11] 李慧. 镍铁渣回收镁制备高纯硫酸镁的工艺控制及机理研究[D]. 南宁: 广西大学, 2022.
LI H. Study on process control and mechanism of recovering magnesium from ferronickel slag to prepare high purity magnesium sulfate[D]. Nanning: Guangxi University, 2022 (in Chinese).
[12] 国家质量监督检验检疫总局, 中国国家标准化管理委员会. 硅酸盐水泥熟料: GB/T 21372—2008[S]. 北京: 中国标准出版社, 2008.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, National Standardization Administration of China. Portland cement clinker: GB/T 21372—2008[S]. Beijing: China Standards Press, 2008 (in Chinese).
[13] BISWAS R K, KHAN P, MUKHERJEE S, et al. Study of short range structure of amorphous silica from PDF using Ag radiation in laboratory XRD system, RAMAN and NEXAFS[J]. Journal of Non-Crystalline Solids, 2018, 488: 1-9.
[14] 刘银, 郑林义, 邱轶兵, 等. 无机非金属材料工艺学[M]. 合肥: 中国科学技术大学出版社, 2015.
LIU Y, ZHENG L Y, QIU Y B, et al. Technology of inorganic nonmetallic materials[M]. Hefei: China University of Science and Technology Press, 2015 (in Chinese).
[15] 国家质量监督检验检疫总局, 中国国家标准化管理委员会. 水泥化学分析方法: GB/T 176—2017[S]. 北京: 中国标准出版社, 2017.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, National Standardization Administration of China. Cement chemical analysis method: GB/T 176—2017[S]. Beijing: China Standards Publishing House, 2017 (in Chinese).