Automatic production process for soft magnetic manganese zinc ferrite granules

A manganese-zinc ferrite and production process technology, which is applied in the field of automatic production process of soft magnetic manganese-zinc ferrite particles, can solve the problems of press and mold wear, easy delamination, large equipment loss, etc., and achieves service life. The effect of prolonging, improving efficiency and reducing production input

Active Publication Date: 2017-09-05
马鞍山新康达磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Automatic production process for soft magnetic manganese zinc ferrite granules
  • Automatic production process for soft magnetic manganese zinc ferrite granules

Examples

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Example Embodiment

[0030] Example 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 soft magnetic manganese-zinc ferrite particles of this embodiment is specifically carried out according to the following steps:

[0032] 1) Ingredients weighing: Weigh the raw materials as follows: Fe 2 O 3 :55mol%, ZnO: 15mol%; Mn 3 O 4 :30mol%; of which Fe 2 O 3 The purity of ZnO is 99.9%, the purity of ZnO is 99.9%, Mn 3 O 4 The Mn content of is 72%; this embodiment adopts the iron formula, that is, the content of the formula is greater than 50%, which improves the initial permeability of the material;

[0033] 2) Primary chemical pulping and sand milling: Add the raw materials to the sand mill, add dispersant A, ammonium citrate, and ammonium citrate wet milling. The added amount is 1% of the total raw materials, and the particle size is d50. <1.0um;

[0034] 3) One-ti...

Example Embodiment

[0038] Example 2

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

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

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

[0042] 3) One-time 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 constant speed. The temperature of the rotary kiln is 800℃, and the holding time is 20min. Then the pellets are discharged from the furnace at a rate of S=2(800-25) / ( 25+25)℃ / h=31℃ / h, cooling down t...

Example Embodiment

[0046] Example 3

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

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

[0049] 2) Primary chemical slurry and sand milling: add the raw materials to the sand mill, add dispersant A, ammonium citrate wet mill, add 2% of the total raw materials, and grind to a particle size of d50 <1.0um;

[0050] 3) One-time 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 constant speed. The temperature of the rotary kiln is 700℃, and the holding time is 30min. Then the pellets are discharged from the furnace at a rate of S=2(700-25) / ( 20+25)℃ / h=30℃ / h, cooling down to room...

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Abstract

The invention discloses an automatic production process for soft magnetic manganese zinc ferrite granules and belongs to the technical field of production of soft magnetic manganese zinc ferrite granules. The process comprises the following steps: batch weighing, primary pulping and grinding, primary spray-drying, pre-sintering, secondary pulping and grinding and secondary spray-drying, adding a plasticizer before secondary spray-drying, uniformly stirring and mixing, and performing spray-drying, wherein the plasticizer refers to a phthalic ester plasticizer. With the adoption of the phthalic ester plasticizer, on one hand, the plasticity of the powder is enhanced, plastic deformation (crushing) of powdered granules is easily caused, and the pressed density of a magnetic core is improved. Under the same strength condition of the magnetic core, the molding pressure of the granules can be reduced from 34-36Mpa to 31-33Mpa, the wear rate of a press is reduced by 0.1-0.5%, and the service life of the mold is prolonged by 0.1-0.5%; and the layering phenomenon in the magnetic core pressing process is reduced, and the production efficiency and product quality of the magnetic core are improved.

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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IPC IPC(8): C04B35/26C04B35/626H01F1/37
Inventor 王利锋陈小林赵光
Owner 马鞍山新康达磁业有限公司
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