Portland cement clinker based on printing and dyeing sludge incineration ash and preparation method: Fid-Bau Portal

Portland cement clinker based on printing and dyeing sludge incineration ash and preparation method

WU QISHENG / GAO LING / DENG CHENGYU / ZHANG WEITAO / SHAO RONG / ZHU HUAJUN / ZHU ZHEYU

The invention discloses Portland cement clinker based on printing and dyeing sludge incineration ash and a preparation method, the Portland cement clinker comprises the printing and dyeing sludge incineration ash, clay, lime, aluminum ash, iron powder and fluorite, and further comprises a heavy metal curing agent accounting for 1-2% of the weight of the printing and dyeing sludge incineration ash, the heavy metal curing agent at least comprises two of sodium metaphosphate, sodium hydrogen phosphate or sodium dihydrogen phosphate. During preparation, the printing and dyeing sludge incineration ash, the clay, the lime, the aluminum ash, the iron powder, the fluorite and the heavy metal curing agent are mixed and ground to prepare a cement raw material, and finally the cement raw material is calcined and cooled to prepare the cement clinker. The cement clinker disclosed by the invention can be formed by calcining at a relatively low temperature, energy consumption is saved, heavy metal ions in the printing and dyeing sludge incineration ash can be effectively solidified, the mechanical property is high, the product performance meets the requirements of Portland cement clinker (GB/T 21372-2008), and meanwhile, the production cost is also reduced.

本发明公开了一种基于印染污泥焚烧灰渣的硅酸盐水泥熟料及制备方法，包括印染污泥焚烧灰渣、粘土、石灰、铝灰、铁粉及萤石，还包括占印染污泥焚烧灰渣重量1‑2％的重金属固化剂，该重金属固化剂至少包括偏磷酸钠、磷酸氢钠或磷酸二氢钠中的两种。制备时将印染污泥焚烧灰渣、粘土、石灰、铝灰、铁粉、萤石和重金属固化剂混合并粉磨制得水泥生料，最后经煅烧、冷却制得水泥熟料。本发明的水泥熟料不仅可以在较低的温度下煅烧而成，节省能耗，还能有效固化印染污泥焚烧灰渣中的重金属离子，而且力学性能高，产品性能满足《硅酸盐水泥熟料》(GB/T 21372‑2008)的要求，同时还降低了生产成本。

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