Preparation method of MgZn ferrite products

The invention discloses a preparation method of MgZn ferrite products, which comprises the following steps: crushing recycled MgZn ferrite into magnetic powders and then mixing with ferric oxide, zinc oxide, magnesium oxide and additives to prepare raw materials; grinding the raw materials into powders; performing spray granulation process: adding water into a sand mill and then adding the grinded powders, controlling the solid content to be 55-65wt%, sanding for 3 hours, adding 17-20wt % of PVA (polyvinyl alcohol) glue in the sanding process, performing the spray granulation when the granularity of the sanded powder is smaller than 1.0 mum; adding zinc stearate into the granulated powder, pressing and molding to prepare semi-finished products, and then sintering the semi-finished products for 3-4 hours in a high-temperature furnace at 1260-1310 DEG C to obtain the products. The method is low in cost, suitable for recycling and short in production period; the prepared MgZn ferrite products are characterized b