碱激发对磷尾矿胶凝特性影响

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中图分类号：TU526 文献标志码：A 文章编号：1005-8249（2026）02-0021-08

DOI：10.19860/j.cnki.issn1005-8249.2026.02.004

Influence of Alkali Activation on the Gelling Properties of Phosphorus Tailings

WANG Hao，GU Bingwei， WANG Jingzheng （ Jiangsu Ocean University，Lianyungang 222OOO， China）

Abstract：Inorder to implement thelow-carbonandenvironmental protectionpolicy，reducetheaccumulationof phosphorus tailingsresourcesand increase therationalutilizationof phosphorus tailingsresources，thispaperjudgesthemechanical propertiesofalkali－activatedphosphorustailingscementitiousmaterialsthrough fivemethods：seting time，mechanical properties，compositioncharacteristics，microstructureandhydration heat.Theresultsshowthattheefect of alkali activation onthesetingtimeofphosphorustailingscementitious materialsiscloselyrelatedtotetypeofactivator.Teinitalseingtime of the PTSCratioisonaverage92minutesshorterthanthatofthePTSSratio.Thefinalseting timeofthePTSCratiois prolongedwith thedecreaseofthesodiumhydroxideratio，whilethefinal seting timeofthePTSSratioisshortenedwiththe decreaseof thesodiumcarbonateratio.Undertheconditionofcompositeactivation，thecompositeactivation efectof sodium hydroxideandsodium silicateisbeterthanthatof sodiumcarbonateandsodium silicate，andtheformed productsare more abundantandthe structureis morecompact.The bestefect isachieved whenthemixedratioof sodium hydroxideand sodium silicate is 1：6 .The influence of different alkali activator ratios onthe hydration heatof phosphorus tailings is not significant，and phosphorustailingsgreatlyinhibittheoccurrnceof hydrationheatTherefore，alkaliactivationcanpromotetheimprovemntof the mechanical propertiesof phosphorus tailings，especiallywhensodium silicateandsodium hydroxideareused.Research

材料科学

findings can providereferences forrelated applications.

Key words： phosphate tailings； alkali activation； microstructure； hydration; cementing performance

0 引言

在过去的几十年里，工业化发展对矿物资源需求的增加，使得矿山尾矿的容量大大增加。（剩余9776字）