人造硅灰结构及火山灰活性研究

Study on the Structure of Artificial Silica Fume and Activity of Volcanic Ash

以蛇纹石为原料经浓酸处理 ,其滤液用于制备轻质氧化镁 ,其残渣主要成分是二氧化硅 ,对残渣进一步超细粉磨加工制成人造硅灰。利用近代测试技术对人造硅灰的形貌、晶相、物相及孔结构和微结构形成过程进行研究 ,测试结果表明 ,人造硅灰是一种非晶态、隐晶质物质 ,具有较大的内比表面积的多孔体 ,具有较高的火山灰活性 ,是一种较为理想的替代硅灰材料。

After the treatment of serpentine with concentrated acid,the resultant filtrate is used to prepare light magnesium oxide,the main composition in the residue is silicon dioxide,and artificial silica fume is made of the residue by further superfine grinding processing.The modern measuring technique is used to study the image,crystal phase, material phase,as wel as the forming processes of the pore structure and the microstructure of the artificial silica fume.The measuring results show that the artificial silica fume is a non crystalline,crypto crystalline and porous substance with a rather high specific surface area,has a rather high activity of volcanic ash and is a type of ideal material which can substitute silica fume.