CN-121974672-A - Method for reutilizing manganese-zinc ferrite waste

Abstract

The invention discloses a method for reutilizing manganese-zinc ferrite waste, and belongs to the technical field of ferrite soft magnetic materials. The method comprises the steps of coarse crushing, sanding, component adjustment, slurry forming, presintering, secondary sanding and granulating of ferrite waste. According to the invention, through the combination of multistage crushing and activation, controllable presintering and trace additive modification, the waste is efficiently recycled on the premise of not introducing complex chemical treatment and not remarkably increasing energy consumption, the process is simple, the cost is low, the electromagnetic performance of the regenerated product meets the original brand requirements, and the recycling and high-value utilization of the waste are realized.

Inventors

• YU JINGJING
• HUANG YOUDONG
• LIU SHIHAO
• WU QIANG

Assignees

• 安徽龙磁金属科技有限公司

Dates

Publication Date

20260505

Application Date

20251231

Claims (10)

1. 1. A method for recycling manganese zinc ferrite waste, comprising the steps of: s1, coarse crushing, namely crushing ferrite waste by using a mechanical crushing method, and sieving; S2, sanding, namely putting the sieved ferrite waste into a sand mill, and adding steel balls and deionized water for crushing to obtain ferrite slurry; S3, component adjustment, namely analyzing the components of the slurry, and adding Fe 2 O 3 , mnO and ZnO into the slurry for balancing according to the component proportion required by production to obtain mixed slurry; S4, slurry forming, namely crushing the mixed slurry for 0.5-2 hours, taking out the slurry, and drying to obtain powder 1; S5, secondary sanding, namely putting the powder 1 into a sand mill again, adding an additive, taking out slurry after crushing for 0.5-2 hours, and drying to obtain powder 2; s6, granulating, namely adding a polyvinyl alcohol aqueous solution according to the total weight of the powder after secondary ball milling, and performing high-speed centrifugal granulation to obtain granules.
2. 2. The method for recycling manganese zinc ferrite waste according to claim 1, wherein in the step S2, the mass ratio of the steel ball to the deionized water to the ferrite waste is (10-20): 0.5-1.
3. 3. The method for recycling manganese zinc ferrite waste according to claim 1, wherein in the step S2, the crushing time is 0.5-2 hours, and the crushed ferrite waste particles D50 are 0.8-1.5 μm.
4. 4. The method for recycling manganese zinc ferrite waste according to claim 1, wherein in the step S4, the powder 1 particles D50 are 0.5-1.0 μm.
5. 5. The method for recycling manganese zinc ferrite waste according to claim 1, wherein between the steps S4 and S5, the method for recycling waste further comprises presintering, wherein presintering is carried out on powder 1 in an air atmosphere at a speed of 200-300 ℃ per hour to 800-950 ℃, heat preservation is carried out for 1-3 hours, and presintering powder is obtained after furnace cooling.
6. 6. The method of recycling manganese zinc ferrite waste according to claim 1, wherein in step S5, said additive comprises one or a combination of CaCO 3 、TiO 2 、Nb 2 O 5 and ZrO 2 .
7. 7. The method for recycling manganese zinc ferrite waste according to claim 6, wherein the adding amount of CaCO 3 is 60-160 ppm, the adding amount of TiO 2 is 150-200 ppm, the adding amount of Nb 2 O 5 is 40-80 ppm, and the adding amount of ZrO 2 is 20-150 ppm.
8. 8. The method for recycling manganese zinc ferrite waste according to claim 1, wherein in the step S5, the powder 2 particles D50 is 0.5-1.5 μm.
9. 9. The method for recycling manganese zinc ferrite waste according to claim 1, wherein in the step S6, the addition amount of the polyvinyl alcohol aqueous solution is 6-15 wt% of the total mass of the powder 2.
10. 10. The method for recycling manganese zinc ferrite waste according to claim 1, wherein in the step S6, the concentration of the polyvinyl alcohol aqueous solution is 5-10% by weight.

Description

Method for reutilizing manganese-zinc ferrite waste Technical Field The invention relates to the technical field of ferrite soft magnetic materials, in particular to a method for reutilizing manganese-zinc ferrite waste. Background In recent years, with the increasing demands of new energy, automobile electronics, and new infrastructure application fields such as 5G, big data, internet of things, the scale of soft magnetic industry has also increased. With this, the amount of waste products in production increases, for example, a large amount of waste products are generated in the process of producing the manganese-zinc ferrite by manganese-zinc ferrite production enterprises, and the generation of the waste products not only causes the waste of mineral resources, but also consumes a large amount of resources for treatment. In the market mainly competing with cost price, waste products are fully recycled, so that huge cost advantages can be brought to enterprises, and mineral resources are reasonably utilized and protected. The waste of the manganese zinc ferrite is generally treated by manufacturers as garbage at low cost, and the manufacturers try to utilize the part of resources, but the recovery capacity is limited, and the recovery rate is low. For example, CN101412623a discloses a method for producing manganese-zinc ferrite particles from manganese-zinc ferrite waste, which has high production cost and complex process, and the introduction of a large amount of chemical reagents generates new industrial waste, which is not lost. CN103819183B discloses a method for recycling manganese zinc ferrite waste, which makes full use of waste though the process is simpler, but the pre-sintering reduction stage still consumes a large amount of energy, and the process can be further simplified. Disclosure of Invention The invention aims to provide a method for reutilizing manganese zinc ferrite waste, which can greatly simplify the difficulty and cost of waste recovery. The invention provides a method for reutilizing manganese-zinc ferrite waste, which comprises the following steps: s1, coarse crushing, namely crushing ferrite waste by using a mechanical crushing method, and sieving; S2, sanding, namely putting the sieved ferrite waste into a sand mill, and adding steel balls and deionized water for crushing to obtain ferrite slurry; S3, component adjustment, namely analyzing the components of the slurry, and adding Fe 2O3, mnO and ZnO into the slurry for balancing according to the component proportion required by production to obtain mixed slurry; S4, slurry forming, namely crushing the mixed slurry for 0.5-2 hours, taking out the slurry, and drying to obtain powder 1; S5, secondary sanding, namely putting the powder 1 into a sand mill again, adding an additive, taking out slurry after crushing for 0.5-2 hours, and drying to obtain powder 2; s6, granulating, namely adding a polyvinyl alcohol aqueous solution according to the total weight of the powder after secondary ball milling, and performing high-speed centrifugal granulation to obtain granules. By adopting the technical scheme, the massive or large-particle ferrite waste is firstly subjected to coarse crushing and sieving, for example, a 20-mesh sieve is adopted to obtain the primary raw material with uniform granularity, and the step can effectively remove impurities and improve the subsequent sanding efficiency; grinding the sieved waste materials to micron level by utilizing the impact and shearing force of steel balls, destroying the original crystal structure of the materials and improving the chemical activity to obtain ferrite slurry, analyzing the components of the slurry, accurately supplementing Fe 2O3, mnO, znO and other oxides according to the component proportion of the brand of a target product to enable the whole chemical components to meet the requirements to obtain mixed slurry, carrying out sufficient secondary crushing and drying on the mixed slurry, for example, carrying out secondary crushing for 0.5-2 h, carrying out secondary crushing and drying to obtain powder 1 with uniform components and controllable granularity, carrying out secondary sanding on the powder 1, adding specific additives such as CaCO 3、TiO2 and the like, carrying out crushing for 0.5-2 h to further refine particles, optimize grain boundary performance and regulate sintering behavior, finally drying to obtain high-activity powder 2, and finally adding a polyvinyl alcohol aqueous solution with specified concentration and proportion as an adhesive according to the total amount of the powder 2, and adopting a high-speed centrifugal granulating process to obtain regenerated particle products with good fluidity and proper strength and suitable for subsequent compression molding and sintering. Preferably, in step S1, the sieving is a 20 mesh sieve. Preferably, in the step S2, the mass ratio of the steel ball to the deionized water to the ferrite waste is (10-20): (0.5-1). P