Process and Mechanism of Ceramsite Filter Material Prepared from Mine Stripping Materials

doi:10.16552/j.cnki.issn1001-1625.2024.1090

Abstract

Abstract: Ceramsite filter material has been widely used in water treatment fields such as biological filter, aerated filter and constructed wetland due to its advantages of light weight, many pores and large specific surface area. In order to solve the large-scale storage of mine stripping materials, this paper used the solid waste of sand and gravel aggregate mine stripping materials as main raw material, and added bauxite and limestone to prepare ceramsite filter materials by sintering method. The effects of batch ratio, water consumption, firing conditions and other factors on the performance of ceramsite filter materials were studied, and the sintering mechanism was clarified. The results show that the minerals inside raw materials form strong mineral phases such as anorthite, diopside and corundum. When the mass ratio of stripping material, bauxite and limestone is 7∶4∶1, the sintering temperature is 1 120 ℃ and the holding time is 45 min, the ceramsite filter material with a bulk density of 765.90 kg/m³, a crushing rate of 3.24%, and a porosity of 54.45% is prepared, which provides a new way for high value utilization of mine stripping materials.

Key words: ceramsite filter material, mine stripping material, sand aggregate, sintering method, firing condition

CLC Number:

TD985

SUN Xuchao, LI Rui, XUE Lutao, WU Kaizhen, WU Xiaoyong, LI Yubiao, CHI Ru’an. Process and Mechanism of Ceramsite Filter Material Prepared from Mine Stripping Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1546-1555.

References

[1] 韩伟, 张传奇, 王海燕, 等. 大宗工业固废用于矿坑回填协同生态修复进展、问题与对策[J/OL]. 环境保护科学, 1-9 (2024-07-15)[2025-01-17]. https://doi.org/10.16803/j.cnki.issn.1004-6216.202403047.
HAN W, ZHANG C Q, WANG H Y, et al. Progress, problems, and countermeasures of collaborative ecological restoration of bulk industrial solid waste used for mine backfilling[J/OL]. Environmental Protection Science, 1-9 (2024-07-15)[2025-01-17]. https://doi.org/10.16803/j.cnki.issn.1004-6216.202403047 (in Chinese).
[2] 庄淑蓉, AURORA T, 陈睿山, 等. 中国砂石资源利用的现状、问题与解决对策研究[J]. 华东师范大学学报(自然科学版), 2022(3): 137-147.
ZHUANG S R, AURORA T, CHEN R S, et al. Trends, challenges, and mitigation strategies for the use of sand and gravel resources in China[J]. Journal of East China Normal University (Natural Science), 2022(3): 137-147 (in Chinese).
[3] SI M. Preparation of ceramsite from solid waste[J]. Journal of Engineering Research and Reports, 2022, 398: 178-184.
[4] CHENG G, LI Q H, SU Z, et al. Preparation, optimization, and application of sustainable ceramsite substrate from coal fly ash/waterworks sludge/oyster shell for phosphorus immobilization in constructed wetlands[J]. Journal of Cleaner Production, 2018, 175: 572-581.
[5] JIANG J, CHEN S, JIN C, et al. Preparation and properties of high-strength lightweight aggregate ceramsite from nepheline tailings[J]. Construction and Building Materials, 2023, 368: 130458.
[6] 沈凡, 韦国苏, 庞若楠, 等. 利用磷尾矿烧制轻质陶粒及其性能研究[J]. 安全与环境学报, 2020, 20(6): 2303-2308.
SHEN F, WEI G S, PANG R N, et al. On lightweight ceramsite smelting from phosphorus tailings and its properties to be achieved[J]. Journal of Safety and Environment, 2020, 20(6): 2303-2308 (in Chinese).
[7] 李晶晶, 张敏娜, 李媛, 等. 不同硅铝比电镀污泥烧制陶粒过程中Zn和Pb的挥发特性[J]. 环境卫生工程, 2024, 32(1): 28-36.
LI J J, ZHANG M N, LI Y, et al. Volatilization characteristics of Zn and Pb in the process of sintering ceramsite from electroplating sludge with different Si/Al ratios[J]. Environmental Sanitation Engineering, 2024, 32(1): 28-36 (in Chinese).
[8] 张东帅, 王进, 岳正波, 等. 城市生活垃圾焚烧飞灰协同底渣制备轻质低硅铝型陶粒实验研究[J]. 环境污染与防治, 2024, 46(1): 32-37.
ZHANG D S, WANG J, YUE Z B, et al. Experimental study on preparation of lightweight low-silicon-aluminum ceramsite from municipal solid waste incineration fly ash in conjunction with bottom ash[J]. Environmental Pollution & Control, 2024, 46(1): 32-37 (in Chinese).
[9] MUÑOZ P, LETELIER V, BUSTAMANTE M A, et al. Assessment of mechanical, thermal, mineral and physical properties of fired clay brick made by mixing kaolinitic red clay and paper pulp residues[J]. Applied Clay Science, 2020, 198: 105847.
[10] KNFŽEK J O, FETTER H. Properties of natural alunitic clays[J]. Journal of the American Ceramic Society, 1946, 29(11): 308-313.
[11] WU X T, GU F Q, SU C, et al. Preparing high-strength ceramsite from ferronickel slag and municipal solid waste incineration fly ash[J]. Ceramics International, 2022, 48(23): 34265-34272.
[12] KRZEMNICKI M S, LEFÈVRE P, ZHOU W, et al. Dehydration of diaspore and goethite during low-temperature heating as criterion to separate unheated from heated rubies and sapphires[J]. Minerals, 2023, 13(12): 1557.
[13] JIA G H, WANG Y L, YANG F L, et al. Preparation of CFB fly ash/sewage sludge ceramsite and the morphological transformation and release properties of sulfur[J]. Construction and Building Materials, 2023, 373: 130864.
[14] LI P W, LUO S H, ZHANG L, et al. Study on preparation and performance of iron tailings-based porous ceramsite filter materials for water treatment[J]. Separation and Purification Technology, 2021, 276: 119380.
[15] ZHANG X, ZHU F X, ZHANG Y, et al. Comprehensive utilization of red mud and blast furnace dust: synergistic preparation of direct reduced iron and functional ceramsite[J]. Separation and Purification Technology, 2024, 345: 127436.