高温固硫物相硫铝酸钙的生成过程研究
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摘要: 利用XRD、SEM和KZDL4M型快速智能测硫仪对硫铝酸钙的形成过程及添加剂对其生成过程的影响进行了研究，探讨了硫铝酸钙的生成与分解反应机理及添加剂对其生成与分解反应的影响。结果表明，1150℃～1450℃能生成硫铝酸钙，同时伴存12CaO7Al2O3，温度高于1350℃时，硫铝酸钙发生分解生成3CaO·Al2O3； MgO在一定程度上利于硫铝酸钙的形成；Fe2O3在较低温下能促进硫铝酸钙的形成，高温下则促进其分解；而SiO2能有效抑制CaSO4的高温分解，却不利于硫铝酸钙的生成。Abstract: Sulphoaluminate calcium is not only a very desulfuration product at high temperature，but also a primary material of a new special type of cement. The formation process of sulphoaluminate calcium at different temperatures and the influence of additive on the formation of sulphoaluminate calcium were studied by XRD, SEM and intelligent sulfur measuring apparatus(KZDL4M). The results indicate that the sulphoaluminate calcium can be formed at the temperature ranging from 1150℃ to 1450℃，12CaO·7Al2O3 can be produced simultaneously. When the temperature is higher than 1400℃， the sulphoaluminate calcium decomposing to 3CaO·Al2O3. MgO promotes the formation of sulphoaluminate calcium. Fe2O3 can promote the formation of sulphoaluminate calcium under low temperature， whereas it will promote its decomposition under high temperature. SiO2 will restrain the decomposition of CaSO4 effectively under high temperature， which makes against the formation of sulphoaluminate calcium.
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Key words:
- desulfuration product /
- sulphoaluminate calcium /
- additive /
- mechanism
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