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Graphite porous crucible and preparation method thereof

A graphite crucible technology, applied in the field of graphite porous crucible and its preparation, can solve the problems of low flexural strength, high resistivity, and low crucible compactness, and achieve improved compactness, low resistivity, and high compactness Effect

Inactive Publication Date: 2020-05-01
CHONGQING EASTSTAR HIGH TEMPERATURE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a graphite crucible to solve the problems of low compactness, high resistivity and low flexural strength of the existing crucible in view of the above-mentioned deficiencies in the prior art

Method used

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  • Graphite porous crucible and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Select 52 parts of graphitized calcined coke, 48 parts of graphitized thermal insulation material, and 20 parts of modified pitch. Mechanically crush and grind graphitized calcined coke and graphitized thermal insulation material to obtain graphitized calcined coke with a particle size of 0-8mm. Coke, graphitized thermal insulation material with a particle size of 0-2mm, kneaded with a 3000L medium-sized kneader, preheated the kneading pot to 140°C, and added graphitized calcined coke and graphitized thermal insulation material into the kneading pot under normal pressure. Heat to 115°C, dry mix for 30 minutes, discharge the moisture in the material, add the modified asphalt into the kneading pot, and discharge the obtained paste into the hopper after wet mixing for 45 minutes; put the paste in the hopper into the preheated and preheated In the air-drying mixing drum with a heating temperature of 80°C, stir and air-dry the material for 10 minutes, and use the horizontal v...

Embodiment 2

[0031] Select 52 parts of graphitized calcined coke, 48 parts of graphitized thermal insulation material, and 20 parts of modified pitch. Mechanically crush and grind graphitized calcined coke and graphitized thermal insulation material to obtain graphitized calcined coke with a particle size of 0-8mm. Coke, graphitized thermal insulation material with a particle size of 0-2mm, kneaded with a 3000L medium-sized kneader, preheated the kneading pot to 140°C, and added graphitized calcined coke and graphitized thermal insulation material into the kneading pot under normal pressure. Heat to 117°C, dry mix for 30 minutes, discharge the moisture in the material, add the modified asphalt into the kneading pot, and discharge the obtained paste into the hopper after wet mixing for 45 minutes; put the paste in the hopper into the preheated and preheated In the air-drying mixing drum with a heating temperature of 80°C, stir and air-dry the material for 12 minutes, and use the horizontal v...

Embodiment 3

[0033] Select 52 parts of graphitized calcined coke, 48 parts of graphitized thermal insulation material, and 20 parts of modified pitch. Mechanically crush and grind graphitized calcined coke and graphitized thermal insulation material to obtain graphitized calcined coke with a particle size of 0-8mm. Coke, graphitized thermal insulation material with a particle size of 0-2mm, kneaded with a 3000L medium-sized kneader, preheated the kneading pot to 140°C, and added graphitized calcined coke and graphitized thermal insulation material into the kneading pot under normal pressure. Heat to 120°C, dry mix for 30 minutes, drain the moisture in the material, add the modified asphalt into the kneading pot, and discharge the obtained paste into the hopper after wet mixing for 45 minutes; put the paste in the hopper into the preheated and preheated In the air-drying mixing drum with a heating temperature of 80°C, stir and air-dry the material for 15 minutes, and use a horizontal vibrati...

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Abstract

The invention relates to a preparation method of a graphite porous crucible. The raw materials of the crucible comprise a solid raw material and modified asphalt, the solid raw material comprises, byweight, 52%-64% of graphitized calcined coke and 36%-48% of a graphitized thermal insulation material, and the modified asphalt accounts for 20%-24% of the solid raw material. The graphite porous crucible is not prone to breakage, low in resistivity and excellent in mechanical property, the prepared graphite crucible is high in compactness, the volume density ranges from 1.62 g / cm3 to 1.64 g / cm3,the resistivity ranges from 20 u.[Omega].M to 25 u.[Omega].M, and the breaking strength is not smaller than 5.7 Mpa; the compact green body is formed by gradually stacking and compacting under the action of self-weight and external force by adopting a horizontal vibration molding process, so that the compactness of the graphite crucible is greatly improved; and the warm roasting mode can greatly reduce the problems of bulging, cracking and the like of the crucible caused by over-high temperature rise or over-fast temperature reduction of the graphite crucible in the roasting process and the cooling process.

Description

technical field [0001] The invention relates to the technical field of crucibles, in particular to a graphite porous crucible and a preparation method thereof. Background technique [0002] With the innovation and development of high-temperature material preparation technology, modern society has put forward higher requirements for crucibles in high-temperature environments. Crucibles can be divided into three categories according to their material composition: ceramic crucibles, clay crucibles and metal crucibles. Among them, ceramic crucibles are widely used and can smelt various iron and steel, non-ferrous metals and their alloys, and have become an indispensable tool in the modern metallurgical industry. The crucible not only needs to have good high temperature resistance, but also has good vibration resistance and strong corrosion resistance. It is difficult for crucibles prepared by traditional methods to meet these requirements. [0003] Graphite has good chemical st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/52C04B35/532F27B14/10
CPCC04B35/522C04B35/532C04B35/66C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567C04B2235/658C04B2235/77C04B2235/96F27B14/10F27B2014/102
Inventor 杨秀刚游兵彭革华罗祥明冯兵梁国龙罗运鹏
Owner CHONGQING EASTSTAR HIGH TEMPERATURE MATERIAL
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