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A kind of automatic production process of soft magnetic manganese zinc ferrite granular material

A manganese-zinc ferrite and production process technology, which is applied in the field of automatic production process of soft magnetic manganese-zinc ferrite granular materials, can solve the problems of large equipment loss, press and mold wear, easy delamination, etc., and achieve service life The effects of elongation, increased pressing density, and improved efficiency

Active Publication Date: 2019-10-25
马鞍山新康达磁业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the existing problems that in order to ensure the strength requirements of the magnetic core, the production molding pressure is too high, resulting in easy delamination of the subsequent molding and pressing, and the serious wear and tear of the press and the mold, and the large loss of equipment, the invention provides a soft magnetic manganese zinc ferrite The automatic production process of solid pellets improves the properties of soft magnetic manganese zinc ferrite pellets, reduces the molding pressure of magnetic core production, reduces the delamination of magnetic core pressing, improves the molding efficiency and the quality of magnetic core products, and reduces the pressure of presses and molds at the same time. Wear and tear, reduce the consumption of spare parts and spare parts, save production costs

Method used

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  • A kind of automatic production process of soft magnetic manganese zinc ferrite granular material
  • A kind of automatic production process of soft magnetic manganese zinc ferrite granular material

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Effect test

Embodiment 1

[0031] figure 1 It is a flow chart of the automatic production process of the soft magnetic manganese zinc ferrite granular material of the present invention. The automatic production process of the soft magnetic manganese zinc ferrite granular material of the present embodiment is specifically carried out according to the following steps:

[0032] 1) Weighing of ingredients: Weigh the raw materials as follows: Fe 2 o 3 : 55mol%, ZnO: 15mol%; Mn 3 o 4 : 30mol%; where Fe 2 o 3 The purity of ZnO is 99.9%, the purity of ZnO is 99.9%, the Mn 3 o 4 The Mn content of the Mn is 72%; the present embodiment adopts the ferrous formula, that is, the Mn content is greater than 50% in the formula, which improves the initial magnetic permeability of the material;

[0033] 2) Primary pulping and sand milling: Add the raw materials into a sand mill, add dispersant A ammonium citrate ammonium citrate for wet grinding, the addition amount is 1% of the total amount of raw materials, and ...

Embodiment 2

[0039] The automatic production process of the soft magnetic manganese zinc ferrite granular material of the present embodiment is specifically carried out according to the following steps:

[0040] 1) Weighing of ingredients: Weigh the raw materials as follows: Fe 2 o 3 : 50mol%, ZnO: 25mol%; Mn 3 o 4 : 25mol%; where Fe 2 o 3 The purity of ZnO is 99.99%, the purity of ZnO is 99.95%, the Mn 3 o 4 The Mn content is 71%;

[0041] 2) Primary pulping and sand milling: Add raw materials into a sand mill, add dispersant A ammonium citrate for wet grinding, the addition amount is 3% of the total raw materials, and grind until the particle size is d50<1.0um;

[0042] 3) primary spray drying: spray drying to obtain powder;

[0043] 4) Pre-burning: Put the powder in step 3) into the rotary kiln for pre-burning at a uniform speed. The temperature of the rotary kiln is 800°C, and the holding time is 20min. 25+25)°C / h=31°C / h, cooling down to room temperature, among them, T 0 =800...

Embodiment 3

[0047] The automatic production process of the soft magnetic manganese zinc ferrite granular material of the present embodiment is specifically carried out according to the following steps:

[0048] 1) Weighing of ingredients: Weigh the raw materials as follows: Fe 2 o 3 : 55mol%, ZnO: 20mol%; Mn 3 o 4 : 25mol%; where Fe 2 o 3 The purity of ZnO is 99.95%, the purity of ZnO is 99.95%, the Mn 3 o 4 The Mn content is 72.4%;

[0049] 2) Primary pulping and sand milling: Add the raw materials into a sand mill, add dispersant A ammonium citrate for wet grinding, the addition amount is 2% of the total amount of raw materials, and grind until the particle size is d50<1.0um;

[0050] 3) primary spray drying: spray drying to obtain powder;

[0051] 4) Pre-burning: Put the powder in step 3) into the rotary kiln for pre-burning at a uniform speed. The temperature of the rotary kiln is 700°C, and the holding time is 30min. 20+25)°C / h=30°C / h, cooling down to room temperature, among...

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Abstract

The invention discloses an automated production process for soft magnetic manganese-zinc ferrite granular materials, and belongs to the technical field of soft magnetic manganese-zinc ferrite granular material production. The process includes the following steps: ingredient weighing, primary slurrying and sand grinding, primary spray drying, pre-calcination, secondary slurrying and sand grinding, and secondary spray drying. Before the secondary spray drying, add water to the slurry. Add a plasticizer, stir and mix, and then spray dry. The plasticizer is a phthalate ester plasticizer. The use of phthalate ester plasticizers on the one hand enhances the plasticity of the powder. The powder particles are prone to plastic deformation (breaking), and the pressing density of the magnetic core is increased. Under the same strength conditions of the magnetic core, the molding pressure of the pellets can be reduced. From 34 to 36Mpa to 31 to 33Mpa, the wear rate of the press is reduced by 0.1 to 0.5%, and the service life of the mold is extended by 0.1 to 0.5%; the delamination phenomenon during the core pressing process is reduced, and the production of the magnetic core is improved. efficiency and product quality.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic manganese zinc ferrite production, and more specifically relates to an automatic production process of soft magnetic manganese zinc ferrite granular material. Background technique [0002] MnZn ferrite is a soft magnetic material with a spinel structure. It is widely used in communication, sensing, Electronic industries such as TV sets, switching power supplies and magnetic heads. In recent years, with the development of electronic devices towards miniaturization and light weight, as well as the rapid development of communication and computer technology, higher and higher requirements have been put forward for the performance of ferrite materials, such as high-definition, digital color TV, flat panel The power supply circuit, switching power supply, notebook computer adapter and CCFL, LCD backlighting of the TV put forward higher requirements on the power loss, magnetic permeability and fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/626H01F1/37
CPCC04B35/2658C04B35/62605C04B35/62645C04B2235/3263C04B2235/3284C04B2235/6562C04B2235/6567H01F1/37
Inventor 王利锋陈小林赵光
Owner 马鞍山新康达磁业股份有限公司
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