粉煤灰-锂渣基发泡陶瓷的制备及性能研究

doi:10.3969/j.issn.1001-1935.2024.01.001

耐火材料 ›› 2024, Vol. 58 ›› Issue (1): 1-7.DOI: 10.3969/j.issn.1001-1935.2024.01.001

• 研究开发 • 下一篇

粉煤灰-锂渣基发泡陶瓷的制备及性能研究

常星岚¹⁾, 陈瑶姬¹⁾, 顾雅洁¹⁾, 孙盛睿²⁾, 孙科¹⁾, 廖达琛¹⁾, 刘阳桥²⁾, 奚爽¹⁾, 李小红²⁾

1)浙江天地环保科技股份有限公司浙江杭州 311199
2)中国科学院上海硅酸盐研究所上海 200050

收稿日期:2023-05-05 出版日期:2024-02-15 发布日期:2024-02-28
作者简介:常星岚:男,1989年生,硕士,工程师。E-mail:975723471@qq.com
基金资助:
国家自然科学基金资助项目(51878647,61574148);浙江省能源集团有限公司科技项目(ZNJK-2022-065);浙江天地环保科技股份有限公司科技项目(TD-KJ-22-007)。

Preparation and properties of foamed ceramics based on fly ash and lithium slag

Chang Xinglan, Chen Yaoji, Gu Yajie, Sun Shengrui, Sun Ke, Liao Dachen, Liu Yangqiao, Xi Shuang, Li Xiaohong

First author's address: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd.,Hangzhou 311199,Zhejiang,China

Received:2023-05-05 Online:2024-02-15 Published:2024-02-28

摘要/Abstract

摘要： 为制备低成本兼具高孔隙率与高压缩强度的发泡陶瓷,以粉煤灰、锂渣、长石、滑石和碳化硅为原料,经1 180、1 200、1 220、1 240 ℃分别保温10、20、40、60 min烧结制备发泡陶瓷试样。主要研究了锂渣的掺量(质量分数分别为0、10%、20%、30%)对试样物相组成、显微结构、孔隙率及压缩强度的影响。结果表明:1)随锂渣掺量的增加,发泡陶瓷的孔隙率增加,体积密度降低,压缩强度波动;2)锂渣中丰富的钙、硫成分,可发挥助熔剂和发泡剂作用,降低烧结温度,提高发泡陶瓷的孔隙率,改善气孔圆整度,提高压缩强度;3)当锂渣掺量为20%(w)时,经1 220 ℃保温20~40 min烧结所得发泡陶瓷的体积密度为0.32~0.40 g·cm^-3,孔隙率为84.4%~87.6%,压缩强度为1.51~2.35 MPa。

关键词: 粉煤灰, 锂渣, 发泡陶瓷, 固废协同, 压缩强度, 孔隙率

Abstract: In order to prepare low-cost foamed ceramics with high porosity and compressive strength,foamed ceramics samples were prepared at different temperatures (1 180,1 200,1 220 and 1 240 ℃) for different durations (10,20,40 and 60 min),using fly ash,lithium slag,feldspar,talcum and silicon carbide as raw materials.The effects of the lithium slag addition (0,10%,20% and 30%,by mass) on the phase composition,microstructure,porosity,and compressive strength of the samples were studied.The results show that:(1)with the increase of the lithium slag addition,the porosity of the samples increases;the bulk density decreases;the compressive strength fluctuates;(2)the calcium and sulfur components in lithium slag work as the fluxing agent and foaming agent,which reduces the sintering temperature,increases the porosity,improves the pore roundness and enhances the compressive strength;(3)when the lithium slag addition is 20%,for the sample obtained at 1 220 ℃ for 20-40 min,the bulk density is 0.32-0.40 g·cm^-3,the porosity is 84.4%-87.6% and the compressive strength is 1.51-2.35 MPa.

Key words: fly ash, lithium slag, foamed ceramic, solid waste coordination, compressive strength, porosity

中图分类号:

TQ175

常星岚, 陈瑶姬, 顾雅洁, 孙盛睿, 孙科, 廖达琛, 刘阳桥, 奚爽, 李小红. 粉煤灰-锂渣基发泡陶瓷的制备及性能研究[J]. 耐火材料, 2024, 58(1): 1-7.

Chang Xinglan, Chen Yaoji, Gu Yajie, Sun Shengrui, Sun Ke, Liao Dachen, Liu Yangqiao, Xi Shuang, Li Xiaohong. Preparation and properties of foamed ceramics based on fly ash and lithium slag[J]. Refractories, 2024, 58(1): 1-7.

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粉煤灰-锂渣基发泡陶瓷的制备及性能研究

Preparation and properties of foamed ceramics based on fly ash and lithium slag

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