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A platform for research: civil engineering, architecture and urbanism
Composite sand powder material as well as preparation method and application thereof
The invention relates to a composite sand powder material and a preparation method and application thereof. The preparation method of the material comprises the following steps: mixing sodium silicate bonded foundry waste sand with waste gypsum, carrying out a hydrothermal reaction on sodium silicate and calcium sulfate in the waste gypsum, removing sodium silicate and generating calcium silicate with good fire resistance, then calcining to enable calcium sulfate and silicon dioxide to generate calcium silicate, and finally, carrying out heat treatment on the calcium silicate. Calcium sulfate is decomposed into calcium oxide, then calcium oxide reacts with silicon dioxide to generate calcium silicate, and mixed sand is obtained. Subsequently, the mixed sand is compounded with magnesium oxide sand and boron nitride through dry ball milling, then high-temperature smelting is performed, and magnesium oxide and aluminum oxide react to generate magnesium aluminate spinel. The sand powder material disclosed by the invention has good fire resistance and mechanical strength, can be used for preparing foundry sand, building materials and stones, and endows products with waterproof, fireproof, anti-corrosion and wear-resistant effects.
本发明涉及一种复合砂粉材料及其制备方法和应用。该材料的制备方法包括以下步骤：将硅酸钠粘结铸造废砂与废石膏混合，硅酸钠与废石膏中的硫酸钙发生水热反应，去除硅酸钠的同时还生成了耐火性能良好的硅酸钙，然后经过煅烧使得硫酸钙能和二氧化硅生成硅酸钙，而且硫酸钙分解成氧化钙，然后氧化钙与二氧化硅发生反应生成硅酸钙，得到混合砂。后续经过干法球磨将混合砂与氧化镁砂和氮化硼复合，然后经过高温熔炼，氧化镁与氧化铝进行反应生成镁铝尖晶石。本发明的砂粉材料具有良好的耐火性能和机械强度，能用于制备铸造砂、建筑材料和石材，赋予产品防水、防火、防腐蚀和耐磨的效果。
Composite sand powder material as well as preparation method and application thereof
The invention relates to a composite sand powder material and a preparation method and application thereof. The preparation method of the material comprises the following steps: mixing sodium silicate bonded foundry waste sand with waste gypsum, carrying out a hydrothermal reaction on sodium silicate and calcium sulfate in the waste gypsum, removing sodium silicate and generating calcium silicate with good fire resistance, then calcining to enable calcium sulfate and silicon dioxide to generate calcium silicate, and finally, carrying out heat treatment on the calcium silicate. Calcium sulfate is decomposed into calcium oxide, then calcium oxide reacts with silicon dioxide to generate calcium silicate, and mixed sand is obtained. Subsequently, the mixed sand is compounded with magnesium oxide sand and boron nitride through dry ball milling, then high-temperature smelting is performed, and magnesium oxide and aluminum oxide react to generate magnesium aluminate spinel. The sand powder material disclosed by the invention has good fire resistance and mechanical strength, can be used for preparing foundry sand, building materials and stones, and endows products with waterproof, fireproof, anti-corrosion and wear-resistant effects.
本发明涉及一种复合砂粉材料及其制备方法和应用。该材料的制备方法包括以下步骤：将硅酸钠粘结铸造废砂与废石膏混合，硅酸钠与废石膏中的硫酸钙发生水热反应，去除硅酸钠的同时还生成了耐火性能良好的硅酸钙，然后经过煅烧使得硫酸钙能和二氧化硅生成硅酸钙，而且硫酸钙分解成氧化钙，然后氧化钙与二氧化硅发生反应生成硅酸钙，得到混合砂。后续经过干法球磨将混合砂与氧化镁砂和氮化硼复合，然后经过高温熔炼，氧化镁与氧化铝进行反应生成镁铝尖晶石。本发明的砂粉材料具有良好的耐火性能和机械强度，能用于制备铸造砂、建筑材料和石材，赋予产品防水、防火、防腐蚀和耐磨的效果。
Composite sand powder material as well as preparation method and application thereof
一种复合砂粉材料及其制备方法和应用
CHEN LONGYANG (author)
2025-01-14
Patent
Electronic Resource
Chinese
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