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Method for manufacturing strontium ferrite rubber plastic magnetic powder with low chlorine content

A technology of strontium ferrite and rubber-plastic magnetic powder, which is applied in the manufacturing field of strontium ferrite rubber-plastic magnetic powder, can solve problems such as the loss of strontium ferrite rubber-plastic magnetic powder, insufficient consistency of chlorine content, and high labor intensity. Achieve good machinability, reduce labor intensity and high production efficiency

Inactive Publication Date: 2010-09-15
MAGNETIC MATERIAL FACTORY MEIZHOU CITY GUANGDONG PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The halogen in strontium ferrite rubber magnets mainly refers to the chlorine content, which mainly comes from strontium ferrite rubber plastic magnetic powder and chlorinated polyethylene. At present, in order to reduce the chlorine content, it is washed with a large amount of water, and strontium ferrite exists A large amount of rubber and plastic magnetic powder is lost into the water, the labor intensity is high, the efficiency is low, the chlorine content consistency is not good enough, and a lot of water resources are wasted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] (1) Take 50kg of iron concentrate powder, 28kg of iron red, 16kg of strontium carbonate and 6kg of strontium chloride and mix them evenly in a mixing machine, and make small balls with a diameter of 7mm with a ball making machine or manually, iron concentrate powder, iron red The purity of strontium carbonate and strontium chloride is ≥98%;

[0011] (2) pre-burn the prepared pellets in an electric furnace at 1100° C. and keep them warm for 4 hours, after naturally cooling to room temperature, crush them into coarse powders of 4 microns with a crusher to obtain 99.5 kg of coarse powders;

[0012] (3) Add 0.995kg of dechlorination agent to the coarse powder. The dechlorination agent is one or more substances in acid copper dechlorination powder or acid copper special dechlorination agent, dechlorination water, and dechlorination treasure. The chlorine agent is mainly to remove strontium chloride that has not completely reacted in the magnetic powder sintering process, gri...

Embodiment 2

[0015] (1) Take 74kg of iron concentrate powder, 10kg of iron red, 12kg of strontium carbonate, 2kg of calcium carbonate and 2kg of strontium chloride and mix them evenly in a mixing machine, and use a ball making machine or artificially to make small balls with a diameter of 15mm; The purity of powder, iron red, strontium carbonate, calcium carbonate and strontium chloride is all ≥ 98%, and the raw materials of embodiment three and embodiment two are the same;

[0016] (2) pre-burn the prepared pellets in an electric furnace at 1260° C. and keep them warm for 1 hour, after naturally cooling to room temperature, crush them into a coarse powder of 6 microns with a crusher to obtain a coarse powder of 99.2 kg;

[0017] (3) Add 19.84kg of acid copper chlorine removal powder and acid copper special chlorine removal agent to the coarse powder. The acid copper chlorine removal powder and acid copper special chlorine removal agent can be ground into 3 micron powder in any weight ratio...

Embodiment 3

[0020] (1) Get 61kg of iron ore concentrate, 20kg of iron red, 14kg of strontium carbonate, 1kg of calcium carbonate and 4kg of strontium chloride and mix them evenly in a mixing machine, and make pellets with a diameter of 11mm with a pelletizing machine or manually;

[0021] (2) Pre-burn the prepared pellets in an electric furnace at 1220° C. and keep them warm for 2.5 hours. After cooling to room temperature, crush them into coarse powders of 5 microns with a crusher to obtain 99 kg of coarse powders;

[0022] (3) Add 14.85 kg of dechlorination agent to the coarse powder. The dechlorination agent is composed of acid copper special-effect dechlorination agent, dechlorination treasure and dechlorination water in any weight ratio. It is ground into a 2.5 micron powder, and the powder is cleaned by stirring with tap water Let stand for 15 minutes. After the powder settles, remove the upper layer of water, dry the precipitate at 300°C, and pass through a 75-mesh sieve to obtain 9...

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Abstract

The invention relates to method for manufacturing strontium ferrite rubber plastic magnetic powder with low chlorine content, comprising the steps of: (1) taking 50-76% of iron ore concentrate powder, 10-30% of iron oxide red, 12-16% of strontium carbonate, 0-2% of calcium carbonate and 2-6% of strontium chloride for evenly mixing, and preparing into 7-15mm small balls; (2) presintering the small balls at 1100-1260 DEG C, carrying out heat preservation for 1-4h, cooling to the room temperature, and grinding into coarse powder of 4-8 microns; (3) adding antichlor with the weight accounting for 1-20% of the total weight of the coarse powder, grinding into power of 2-3 microns, stirring and cleaning the powder by water for 10-20min, and standing still; after the powder precipitates, removing the water at the upper layer; and finally, drying the precipitate at 180-400 DEG C, sieving at 70-80 meshes, and obtaining the strontium ferrite rubber plastic magnetic powder. The method combines dechlorination and crushing into grinding working procedure, reduces the chlorine content to 178ppm, saves the water consumption, and has the characteristics of simplifying the technique, being coarse in magnetic powder granularity, good processing performance, high magnetic property and low loss rate of magnetic powder.

Description

technical field [0001] The invention belongs to the field of ferrite rubber magnets, in particular to a method for manufacturing strontium ferrite rubber-plastic magnetic powder with low chlorine content. Background technique [0002] Strontium ferrite rubber and plastic magnetic powder is mainly used as the main raw material of strontium ferrite rubber magnets. Strontium ferrite rubber magnets are suitable for electronics, electrical appliances, household appliances, daily necessities, micro-motors, door seals, toys, stationery, advertising, printing For decoration, etc., the proportion of magnetic powder in strontium ferrite rubber magnetic materials accounts for 90%. The magnetic properties of rubber and plastic mainly depend on the magnetic properties of rubber and plastic magnetic powder. High performance also depends on the ease of processing. The processability of rubber and plastic magnetic powder is closely related to its particle size and the chlorine content in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/11H01F1/36
Inventor 陈玉兰肖映秋王新庆叶英畅涂锐肖新文
Owner MAGNETIC MATERIAL FACTORY MEIZHOU CITY GUANGDONG PROV
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