一种钢渣基复合相变储热材料及其制备方法和应用

By preparing steel slag-based composite phase change thermal energy storage materials and designing a cascade thermal energy storage system, the application limitations of steel slag in waste heat recovery in the steel industry have been solved, achieving efficient and stable thermal energy management and material utilization.

CN122059718BActive Publication Date: 2026-07-17JIANGSU SHAGANG GROUP CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU SHAGANG GROUP CO LTD
Filing Date
2026-04-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The lack of existing technologies for preparing composite phase change thermal storage materials using steel slag limits their application in the field of intermittent waste heat recovery in the steel industry. Furthermore, existing materials suffer from problems such as low thermal conductivity and easy leakage.

Method used

By mixing steel slag powder with an alkaline activator solution and forming a porous ceramic skeleton through a geological polymerization reaction, and then impregnating it with molten phase change salt, a steel slag-based composite phase change thermal energy storage material with a three-dimensional network structure was prepared, and a cascade thermal energy storage system was designed for thermal energy management.

Benefits of technology

A composite phase change thermal energy storage material with high thermal density, excellent cycle stability and high mechanical strength has been developed, which is suitable for intermittent waste heat recovery in the steel industry and improves the availability and economy of waste heat recovery systems.

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Abstract

本发明提供了一种钢渣基复合相变储热材料及其制备方法和应用,包括如下步骤:S1、将钢渣破碎、磨粉获得钢渣微粉;S2、将钢渣微粉与碱性激发剂溶液按照特定比例混合,搅拌形成均匀浆料;S3、向浆料中加入发泡助剂,搅拌发泡,获得泡沫浆料;S4、将泡沫浆料注入模具,通过地质聚合反应原位凝固,形成具有三维网络结构的湿凝胶胚体;S5、将湿凝胶胚体脱模干燥后烧结处理,得到多孔钢渣基陶瓷骨架;S6、将多孔钢渣基陶瓷骨架预热至高于相变盐熔点20~50 ℃的温度,于真空状态下浸渍于熔融的相变盐中保持30~60 min,使相变盐充分渗入骨架孔隙,得到钢渣基复合相变储热材料,并可应用于钢铁间歇性余热回收。
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Citation Information

Patent Citations

  • Modified steel slag and preparation method thereof and heat storage material

    CN112322257A

  • Steel slag-based porous ceramic composite phase change material and preparation method thereof

    CN119263882A