硅渣基高可溶性硅矿物材料制备及性能研究

Preparation and Properties of Silica Slag-Based Highly Soluble Silicon Mineral Materials

以硅渣为原料,引入NH4OH、KOH和CaO碱性组分,通过水热法制备有效释放可溶性硅的K_(8)CaSi_(10)O_(25)/硅渣矿物材料。利用扫描电子显微镜(SEM)和X射线衍射(XRD)仪等对样品进行形貌和结构表征。研究了水热反应时间对产物可溶性硅浸出率的影响规律。结果表明,水热反应后,微米级硅渣块体表面负载了具有弯曲薄片状纳米结构的K_(8)CaSi_(10)O_(25),改性后的硅渣矿物的枸溶性硅为1197.5 mg/L,浸出率较原始硅渣提高了约60倍,水溶性硅为519.8 mg/L,浸出率较原始硅渣提高了约50倍。

Using silica slag as raw material,K_(8)CaSi_(10)O_(25)/silica slag mineral material,which can effectively release soluble silicon,were prepared by hydrothermal method with the incorporation of NH4OH,KOH and CaO alkaline components.Morphology and structural characterization of samples were characterized by SEM and XRD techniques.The influence of hydrothermal reaction time on the leaching rate of soluble silicon was studied.The results show that after the hydrothermal reaction,the surface of the micron-sized silica slag block is loaded with K_(8)CaSi_(10)O_(25) with curved sheet-like nanostructure,the modified silica slag mineral had a lycium-soluble silicon of 1197.5 mg/L,which increased by about 60 times compared with the original silica slag,and 519.8 mg/L for water-soluble silicon,which was about 50 times higher than that of the original silica slag.