浮选磷尾矿对白硅酸盐水泥微观结构和宏观强度的影响

IF 1.4 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Cement Research Pub Date : 2022-02-16 DOI:10.1680/jadcr.21.00086

Zhen Wang, Lei Huang, Pinghua Lian, Shaowen Huang

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引用次数: 2

摘要

磷矿开采工业产生大量的尾矿。磷尾矿的合理利用对资源的充分利用和环境的保护具有重要意义。本研究以PT为原料制备白硅酸盐水泥熟料(WPCC)。采用XRD、SEM-EDS、TG-DSC、FTIR等研究了PT对WPCC矿物组成、离子固溶体及强度的影响。结果表明:PT作为WPCC原料的一部分，可以显著改善原料的可燃性，增加液相含量，促进矿物的形成;PT的加入稳定了α′-C2S晶体，促进了熟料中C3S晶体由t型向m型转变;PT的加入对CaCO3的分解温度、液相显现温度和C3S的形成温度无显著影响;与对照组相比，PT含量为2.5%时，WPCC的强度最高。3d强度提高46.86%，28d强度提高82.59%。

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Effect of flotation phosphorus tailings on the microstructure and macroscopical strength of white Portland cement

The phosphate mining industry produces large amounts of tailings. Rational utilization of phosphorus tailings (PT) is of great significance for the full utilization of resources and environmental protection. In this study, PT was used as part of raw materials to prepare white Portland cement clinker (WPCC). XRD, SEM-EDS, TG-DSC, and FTIR, etc. were used to study the effect of PT on mineral composition, ionic solid solution and strength of WPCC. he results showed as follows: PT as part of the raw material of WPCC could significantly improve the burnability of raw materials, increase the content of liquid phase, and promote the formation of minerals; The addition of PT stabilized the α’-C2S crystal and promoted the C3S crystal in the clinker tend to change from T-type to M-type; There was no significant effect for PT's addition on the decomposition temperature of CaCO3, the appearance temperature of liquid phase and the formation temperature of C3S; Compared with the control group, when PT content was 2.5%, WPCC had the highest strength. its 3d strength increased by 46.86% and 28d strength increased by 82.59%.

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来源期刊

Advances in Cement Research 工程技术-材料科学：综合

CiteScore

3.70

自引率

5.00%

发文量

审稿时长

3.2 months

期刊介绍： Advances in Cement Research highlights the scientific ideas and innovations within the cutting-edge cement manufacture industry. It is a global journal with a scope encompassing cement manufacture and materials, properties and durability of cementitious materials and systems, hydration, interaction of cement with other materials, analysis and testing, special cements and applications.