粉煤灰-钢渣基陶瓷砖的制备工艺优化

doi:10.16552/j.cnki.issn1001-1625.2025.0496

摘要/Abstract

摘要： 本研究的主要原料为钢渣和粉煤灰,石英砂为辅料,基于钢渣与粉煤灰的协同作用,制备出粉煤灰-钢渣(CaO-MgO-SiO₂-Fe₂O₃-Al₂O₃)基陶瓷砖。研究了原料配比以及成型压力(15~35 MPa)、烧结温度(1 165~1 190 ℃)、保温时间(30~60 min)等工艺参数对陶瓷砖物理和力学性能的影响。结果表明,最优质量配比为m₁(钢渣)∶m₂(粉煤灰)∶m₃(石英)=9∶8∶4,粉煤灰掺量的影响显著性最高。成型压力25 MPa时陶瓷坯体密实度最佳,过高压力导致晶体破裂。烧结温度1 180 ℃时陶瓷衍射峰强度最高,断裂模量最大,吸水率最小;保温时间60 min时晶粒排列致密,力学性能最优。在优化工艺(25 MPa的成型压力,1 180 ℃烧结且保温60 min)下,制备出以钙铝黄长石(Ca₂Al(AlSi)O₇)和透辉石(CaMgSi₂O₆)为主要晶相的瓷质砖,其断裂模量高达69.86 MPa,吸水率低至0.12%。

关键词: 钢渣, 粉煤灰, 陶瓷, 钙铝黄长石, 透辉石, 力学性能

Abstract: The main raw materials of this study were steel slag and fly ash, with quartz sand as the auxiliary material. Based on the synergistic effect of steel slag and fly ash, fly ash-steel slag (CaO-MgO-SiO₂-Fe₂O₃-Al₂O₃) based ceramic tiles were prepared. The effects of raw material ratios and process parameters such as molding pressure (15~35 MPa), sintering temperature (1 165~1 190 ℃), and holding time (30~60 min) on the physical and mechanical properties of ceramic tiles were investigated. The results show that the optimal mass ratio is m₁(steel slag)∶ m₂(fly ash)∶ m₃(quartz)=9∶8∶4, and the influence of fly ash content is the most significant. The density of the ceramic body is the best at a molding pressure of 25 MPa, and excessive pressure led to crystal fracture. The diffraction peak intensity is the highest, the fracture modulus is the largest, and the water absorption is the lowest at a sintering temperature of 1 180 ℃. The grain arrangement is the densest and the mechanical properties are the best at a holding time of 60 min. Under the optimized process (25 MPa molding pressure, sintering at 1 180 ℃ and holding for 60 min), porcelain tiles with gehlenite (Ca₂Al(AlSi)O₇) and diopside (CaMgSi₂O₆) as the main crystal phases are prepared, with a fracture modulus as high as 69.86 MPa and a water absorption as low as 0.12%.

Key words: steel slag, fly ash, ceramics, gehlenite, diopside, mechanical property

中图分类号:

X705

嵇鹰, 苏虎雄, 刘保林, 陈欢, 刘仕滨, 吴佳瑞. 粉煤灰-钢渣基陶瓷砖的制备工艺优化[J]. 硅酸盐通报, 2025, 44(12): 4413-4424.

JI Ying, SU Huxiong, LIU Baolin, CHEN Huan, LIU Shibin, WU Jiarui. Optimization of Preparation Process for Fly Ash-Steel Slag Based Ceramic Tiles[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(12): 4413-4424.

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