The invention relates to a staying filtering assisting grain used bentonite as raw material manufacturing technique. It includes the following steps: chopping bentonite; ball milling; rotational flow separating after washing stripping; adding proper sodium salt to swirler; dissolving crystobalite to solubility silicon salt; column supporting silicon matter or aluminum salt; drying in stages. The technique is added sodium salt and parts of crystobalite to generate solubility silicic acid matter to remove the crystobalite fully, used silicon and aluminum as column agent, and adopted program temperature controlling drying technique to dry to ensure product quality. The product is fit for paper making demands of litter grain size and high ratio surface area staying filtering assisting, greatly improve bentonite mine yield to make the utilization of the bentonite resources reach the best. |