Waste magnetic core recycling method

Abstract

The invention discloses a waste magnetic core recycling method. The waste magnetic core recycling method comprises the following steps: grinding clean waste magnetic cores; preparing PVA glue; mixingmaterials obtained in the two previous steps with an accessory ingredient, and carrying out fine grinding, spray granulation, molding and compressing, sintering and cooling to obtain recycled magneticcores. According to the method, the waste magnetic cores are recycled, the magnetic cores can be recycled in energy conservation and environment protection manners at high temperature in only one step in the manufacturing process, and the accessory ingredient is doped during grinding, so that the sintering temperature is reduced, and the product appearance is further improved. Therefore, the magnetic cores recycled in the method are extremely close to non-recycled magnetic cores in appearance, and are compact internally and excellent in electromagnetic performance.

Description

technical field [0001] The invention relates to a manufacturing method of a magnetic core, in particular to a remanufacturing method of a discarded magnetic core. Background technique [0002] The manufacturing method of magnetic core in the prior art comprises following six steps: [0003] 1. Mixing vibration: mix and vibrate raw materials such as ferric oxide, zinc oxide, nickel oxide, magnesium oxide, copper oxide, and bismuth oxide according to the formula ratio, and mix and grind various raw materials evenly; [0004] 2. False sintering: use the above-mentioned mixed and finely ground mixture for false sintering, the sintering temperature is 900-1100°C, and the sintering time is about 16 hours. The purpose is to make the mixed material semi-ferrite and stabilize the sintering of the product in the subsequent process. shrinkage and reduce product deformation; [0005] 3. Granulation: After secondary ball milling or sand milling, the fake sintered material is granulated...

AI Technical Summary

Problems solved by technology

[0009] This manufacturing method requires the use of a variety of raw materials, and there are two steps that require high temperature conditions for a long time, consuming a lot of energy

[0010] The patent document with the publication number "CN102915821B" discloses a manufacturing method of nickel-zinc soft magnetism. This scheme uses waste magnetic cores, and after the steps of crushing and grinding, adding glue to make granules, pressing and molding, drying and curing, the waste magnetic cores Core remanufacturing, environmental protection and energy saving, but the appearance of the magnetic core obtained by this scheme is more obvious than that of the non-recycled magnetic core. It is easy to see that it is a recycled product, and the product is not dense enough, with too many air molecules. In the middle, an unequal magnetic field will be formed, causing strong and strong interference, causing harm to electronic parts and shortening the service life of electrical appliances