Preparation and agglomeration mechanism of high-strength rapidly dispersed calcium silica particles
Calcium-silicon powder was used as raw material,calcium lignosulfonate-chitosan was added as organic binders,and silicon-calcium pellets were prepared by disc granulation technology.Different bind-ers,calcium lignosulfonate,the effect of factors such as chitosan addition amount and drying temperature on the compressive properties and quick-dispersion properties of calcium silicate pellets were investiga-ted,and the granulation process conditions were optimized.With the help of XRF,XRD,FTIR and other technologies,the raw materials and samples structure and properties were analyzed to explore the mecha-nism of agglomeration and granulation of silicon-calcium powder.The results show that the best molding and granulation conditions are 3.75%calcium lignosulfonate,1.25%chitosan,and a drying temperature of 115℃,the particles are closely agglomerated,and the average compressive strength is 34.4 N.The penetration of water molecules into the particles is accelerated,and the hydrostatic test results show that the samples could be completely disintegrated within 51 s.
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