Preparation method and apparatus for medical intermediate filtering material

The invention discloses a preparation method and apparatus for a medical intermediate filtering material, and relates to the technical field of medicine preparation. The method comprises the steps of a, preparing ferric nitrate, nickel sulfate, EDTANa2 and hydrazine hydrate into 10-25% by mass of a solution, and regulating the pH value to 4-6; b, mixing silica sol, boric acid and dimethylamine, diluting a mixture to be 30-60% by mass, performing ultrasonic oscillation for 2-5 hours, and regulating the pH value to 3-7; c, putting products prepared in the steps a and b into plasma flame sprayed by a plasma spray gun according to a volume ratio of (1-8) : 1; and d, spraying the plasma flame to the surface of a support body such as an aluminum oxide honeycomb ceramic, a stainless steel pore plate or the like for performing an in-situ reaction to prepare the medical intermediate filtering material. The preparation apparatus is characterized in that a feeding sleeve pipe is arranged on the front side of a spray ope