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Sectional high-performance strontium ferrite presintering equipment and presintering method thereof

A strontium ferrite, high-performance technology, used in strontium ferrite pre-burning equipment, the device's pre-burning field, can solve the problems that cannot meet the temperature of different temperature zones, sufficient redox atmosphere conditions, large shrinkage fluctuations, reaction Incomplete and other problems, to achieve the effect of novel ideas, energy saving and efficiency improvement

Active Publication Date: 2014-09-10
SINOSTEEL ANHUI TIANYUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, strontium ferrite pre-burning devices are mainly rotary kilns and coal kilns that use oil or gas as fuel. Due to the design characteristics of rotary kilns and coal kilns, a layer of 200mm refractory brick , the combustion device can only be installed at a certain position at the end of the kiln to heat up the kiln, and the temperature of other parts of the kiln depends on radiation heating in the high-temperature zone, which cannot meet the temperature of different temperature zones required for the oxidation reaction of high-performance strontium ferrite pre-fired materials. Sufficient oxidation-reduction atmosphere conditions lead to incomplete reaction, poor magnetic properties, and large fluctuations in shrinkage rate, which can only meet the pre-sintering conditions of low-grade strontium ferrite pre-fired materials, and cannot meet the requirements of high-performance magnet products. Requirements for indicators of body pre-fired materials

Method used

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  • Sectional high-performance strontium ferrite presintering equipment and presintering method thereof
  • Sectional high-performance strontium ferrite presintering equipment and presintering method thereof
  • Sectional high-performance strontium ferrite presintering equipment and presintering method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for producing pre-sintered material with segmented high-performance strontium ferrite pre-sintered equipment, specifically according to the following steps:

[0041] The first step, prepare the block

[0042] 1) Ingredients: Weigh the raw materials according to the following weight ratio, Fe 2 o 3 : 87%, SrCO 3 : 13%, Al 2 o 3 :

[0043] 0.25%, SiO 2 : 0.25%, La 2 o 3 : 2.5%, Co 2 o 3 :2%;

[0044] 2) Primary ball milling: Add raw materials and auxiliary materials to a horizontal ball mill and add water for wet milling, according to the weight of materials, balls and water

[0045] The amount ratio is 1:3:2, and the particle size reaches 1.0μm;

[0046] 3) Forming: The ground slurry is press-filtered and formed to obtain raw material blocks;

[0047] The second step, equipment inspection

[0048] Check whether the equipment of each part of the pre-burning equipment is in normal operation, whether the instrument display of the temperature in each t...

Embodiment 2

[0064] A method for producing pre-sintered material with segmented high-performance strontium ferrite pre-sintered equipment, specifically according to the following steps:

[0065] The first step, prepare the block

[0066] 1) Ingredients: Weigh the raw materials according to the following weight ratio, Fe 2 o 3 : 86%, SrCO 3 : 14%, Al 2 o 3 :

[0067] 0.35%, SiO 2 : 0.4%, La 2 o 3 : 3%, Co 2 o 3 : 2.5%

[0068] 2) Primary ball milling: Add raw materials and auxiliary materials to a horizontal ball mill and add water for wet milling, according to the weight of materials, balls and water

[0069] The amount ratio is 1:3:2, and the particle size reaches 1.0μm;

[0070] 3) Forming: The ground slurry is press-filtered and formed to obtain raw material blocks;

[0071] The second step, equipment inspection

[0072] Check whether the equipment of each part of the pre-burning equipment is in normal operation, whether the instrument display of the temperature in each te...

Embodiment 3

[0088] A method for producing pre-sintered material with segmented high-performance strontium ferrite pre-sintered equipment, specifically according to the following steps:

[0089] The first step, prepare the block

[0090] 1) Ingredients: Weigh the raw materials according to the following weight ratio, Fe 2 o 3 : 87%, SrCO 3 : 13%, Al 2 o 3 :

[0091] 0.25%, SiO 2 : 0.25%, La 2 o 3 : 2.5%, Co 2 o 3 : 2.8%

[0092] 2) Primary ball milling: Add raw materials and auxiliary materials to a horizontal ball mill and add water for wet milling, according to the weight of materials, balls and water

[0093] The amount ratio is 1:3:2, and the particle size reaches 1.0μm;

[0094] 3) Forming: The ground slurry is press-filtered and formed to obtain raw material blocks;

[0095] The second step, equipment inspection

[0096] Check whether the equipment of each part of the pre-burning equipment is in normal operation, whether the instrument display of the temperature in each...

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Abstract

The invention discloses sectional high-performance strontium ferrite presintering equipment and a presintering method thereof and belongs to the technical field of magnetic materials. The equipment is formed by a presintering kiln, a heating system, a variable frequency induced-draft control device and a material transferring device; a hydraulic feed mechanism of the material transferring device is mounted outside the inlet end of a kiln body; guide rails are mounted in parallel in the presintering kiln; pushing plates are arranged on the guide rails; the hydraulic feed mechanism is in contact with the pushing plates; the heating system comprises heating elements, a temperature control instrument and thermocouples; the heating elements, the thermocouples and the temperature control instrument are electrically connected; the heating elements and the thermocouples are respectively mounted in one third to four ninth section, four ninth to five ninth section and two third to seven ninth section of the kiln body; an air duct of the variable frequency induced-draft control device is formed in one side of the bottom of the presintering kiln; air pipes are communicated with the air duct and arranged below the pushing plates; an air inlet of a variable frequency induced draft fan is formed above presintering kiln and close to the outlet end; an air outlet is connected with the air duct. The sectional high-performance strontium ferrite presintering equipment is convenient to use, not only ensures the temperature in a low temperature region, but also ensures the sufficient oxidoreduction atmosphere in the kiln and saves energy.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a strontium ferrite pre-burning device, and also relates to a pre-burning method of the device. Background technique [0002] In recent years, with the wide application of automobile motors, household appliances, frequency conversion motors, sensors and generators, the demand for permanent magnet ferrite products with strontium ferrite calcined material as the main material has increased year by year. At present, strontium ferrite pre-burning devices are mainly rotary kilns and coal kilns that use oil or gas as fuel. Due to the design characteristics of rotary kilns and coal kilns, a layer of 200mm refractory brick , the combustion device can only be installed at a certain position at the end of the kiln to heat up the kiln, and the temperature of other parts of the kiln depends on radiation heating in the high-temperature zone, which cannot meet the temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B9/06F27B9/26F27B9/30F27B9/36C04B35/26C04B35/64
Inventor 张野李劲松刘静赵修彬张伟徐俊杰舒云峰董颖潘正蒙
Owner SINOSTEEL ANHUI TIANYUAN TECH
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