一种电解硅灰石制备零碳水泥熟料和C-S-H凝胶的方法

The method of preparing cement clinker and CSH gel by electrolysis of wollastonite solves the problem of carbon dioxide emissions caused by traditional high-temperature calcination, and realizes zero-carbon emission cement clinker preparation and efficient resource utilization.

CN121107721BActive Publication Date: 2026-07-17SOUTHEAST UNIV
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Patent Information

Application Number
CN202511105196.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-07
Publication Date
2026-07-17
Estimated Expiration
2045-08-07

AI Technical Summary

Technical Problem

Traditional high-temperature calcination processes for preparing cement clinker release large amounts of carbon dioxide. Wollastonite is difficult to decompose effectively and participate in the reaction during cement clinker preparation, thus failing to meet the needs of low-carbon development.

Method used

The electrolysis of wollastonite is carried out in an H-type reaction cell. Oxygen is generated in the anode cell to produce hydrogen ions, and hydrogen is generated in the cathode cell to produce hydroxide ions. Wollastonite dissolves into calcium ions and silicate ions under acidic conditions. Calcium hydroxide and silicon dioxide are obtained through electrolysis and used as calcium and silicon sources for preparing cement clinker. After high-temperature calcination, C3S and C2S are generated.

Benefits of technology

This method achieves zero-carbon emission cement clinker preparation, efficiently utilizes wollastonite resources, avoids the carbon emission problems in the traditional calcium source preparation process, and prepares CSH gel, thereby improving resource utilization efficiency.

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Abstract

本发明属于建筑材料技术领域，具体涉及一种电解硅灰石制备零碳水泥熟料和C‑S‑H凝胶的方法。本发明的电解硅灰石制备零碳水泥熟料和C‑S‑H凝胶的方法，包括下述步骤：（1）在H型反应槽中加入电解液，并分别在H型反应槽的阳极槽和阴极槽中加入电极；（2）将硅灰石置于阳极槽中，采用直流电源进行电解；（3）电解结束后收集氢氧化钙和二氧化硅；（4）将收集得到的氢氧化钙和二氧化硅混合均匀，煅烧，即得水泥熟料；和 / 或，将经步骤（3）处理得到的阳极槽的电解液和阴极槽的电解液混合均匀，过滤，即得C‑S‑H凝胶。本发明有助于减少水泥熟料制备过程中的二氧化碳的排放，实现硅灰石的资源化利用。
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Citation Information

Patent Citations

  • Calcium silicate mineral and product

    CA394275A

  • Synthetic method of tricalcium silicate clinker, and Portland cement production technology

    CN110156354A

  • Method for promoting wollastonite to produce white carbon black and calcium carbonate through air-driven membrane electrolysis technology

    CN116969495A