粉煤灰浆液钙离子浸出机制与工艺参数调控研究

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关键词：粉煤灰浆液；钙离子；液固比；搅拌强度；矿化封存

中图分类号：TD752.2 文献标识码：A 文章编号：1008-9500（2026）02-0001-03

DOI： 10.3969/j.issn.1008-9500.2026.02.001

Study on the Leaching Mechanism of Calcium Ions and the Regulation of Process Parameters in Fly Ash Slurry

CAIChuncheng，WANGRui'，YANGShaoqing²，YE Ziqing'，ZHANGZhiyi² （1.ShanghaiatuEegyod.，angsurachuzhuo，ina;.ijangUersityUuia）

Abstract： The application of wet mineralization technology for CO2 capture using fly ash is limited by the low leaching fficiencyofcalciumions.Single-factorexperimentswereconducted toanalyzetheefectsofnaturalleachingtime，liquidto-solidratio，andstirringintensityonthecalciumionleaching behaviorofhigh-calciumflyash.Theresultsshowthatthe natural leaching process can be divided into three stages： 10～60 min is the rapid release stage，with a calcium ion mass concentration increase of 90.9% 60～180 min is the diffusion-controlled stage，with the increase decreasing to 13.1% ， after 180 min，it enters a quasi-equilibrium state.When the liquid-to-solid ratio is 5：1 ，the total calcium ion leaching amount reachesits peak （1O 215 mg）.When the stirring intensity is 700r/min ，the calcium ion mass concentration peaks （1894mg/L）.Thehigh-alkalineenvironment improves leaching efficiencybydepolymerizing thesilica-alumina network and inhibiting calcium carbonate precipitation， providing theoretical support for process optimization.

Keywords： flyash slurry;calcium ion; liquid-solid ratio; stirring intensity;carbon mineralization

目前，我国燃煤发电粉煤灰年排放量已超过8亿t，而粉煤灰的堆存会引发诸多环境问题[。（剩余3074字）