Magnetic waste material recycling method

Abstract

The invention provides a magnetic waste material recycling method. The magnetic waste material recycling method comprises the following steps: (1) waste materials collected in the production process are stored at fixed points in a storage place; (2) the waste is taken out from the storage place and the waste is dried in a drying room; (3) crushing and roughly screening the dried waste are carriedout, and impurities of the non-magnetic material are separated; (4) 10%-15% by weight of water is added into the coarsely screened waste, and pressing to form a round cake with the diameter of 5-10 mmis carried out; (5) the round cake is sintered and formed in a sintering furnace, and a recycled material is obtained; (6) the recycled material is crushed into powder, the powder is added into the new material according to a weight ratio of 2-10%, and ball milling is carried out to obtain a processed material; (7) the processed material is magnetized in a forming machine and extruded into a product forming body; and (8) secondary sintering is carried out on the product forming body in a sintering furnace to finally obtain a magnetic finished product. According to the method, waste products can be greatly reduced, original low-value waste products are recycled into raw materials capable of being made into products, the output of the waste products is reduced, and the economic benefits ofenterprises are improved.

Description

technical field [0001] The invention relates to a method for recycling process waste in the production process of magnetic materials, in particular to a method for recycling and using magnetic waste materials. Background technique [0002] Magnetic materials are widely used in the field of electronics, from common radio speakers, car horns, to permanent magnet materials in electric devices in complex circuits, all of which are widely used in magnetic materials. Magnetic materials are mostly hard alloy materials. The cemented carbide materials are processed by high temperature sintering. The raw materials of cemented carbide include ferrite materials and other oxidized magnetic metal materials. These materials themselves have magnetic sensitivity. After crushing these oxide materials and After molding and sintering, the cured material is the required magnetic material. These magnetic materials have the characteristics of high hardness, impact resistance, permanent and stable ...

AI Technical Summary

Problems solved by technology

[0003] Different shapes of magnetic materials need to be extruded and solidified in the corresponding mold, and the magnetic material has been processed into powder before entering the mold, and a binder is added. The magnetic powder needs to be filled in the cavity of the mold, and the mold is closed. Extrusion after extrusion molding, and in the process of filling the magnetic powder, the excess part must be scraped off. These materials have a high degree of cleanliness and can be refilled, but they cannot be recycled and refilled many times, because the cleanliness depends on the mold. In the process of contact, it can only be discarded. In addition, in the process of magnetic powder processing, there will be a stage where waste materials need to be produced. The cleanliness of these waste materials cannot be directly recycled, but can only be discarded. Traditional waste is sold as iron waste. Therefore, the price of recycling is very low, and its value is not effectively utilized, and the waste has a high impurity rate, and contains adhesives, making it partially hardened, making it difficult to process, and it is difficult to ensure the stability of material quality