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Preparation method of graphite crucible

A technology for graphite crucibles and crucibles, which is applied in the field of preparation of graphite crucibles, can solve the problems of not being able to meet the needs of use, consume more energy, and have a long production cycle, and achieve remarkable energy-saving effects, simple process conditions, and low resource waste rates.

Inactive Publication Date: 2013-01-30
江苏海菱碳制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation methods of graphite crucibles have the disadvantages of complex procedures, large footprint, high energy consumption, low pass rate, and long production cycle, which cannot meet the needs of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of graphite crucible, is characterized in that, comprises the steps:

[0017] a, add the natural graphite that is 45% by weight in container, the petroleum coke particle that percentage by weight is 9% silicon, the petroleum coke particle that percentage by weight is 35%, stir, and control stirring speed is 1000r / min, again Adding the phenolic resin that weight percentage is 11% in the container;

[0018] b. Continue to stir, control the stirring time to 20 minutes, and use a pressure molding machine to form;

[0019] c. Put the formed crucible green body into a crucible incinerator for roasting, control the roasting time to 10 hours, and the roasting temperature is 200° C. to obtain a roasted product crucible;

[0020] d. Dry the crucible of the roasted product for 20 hours, and control the drying temperature to 100°C;

[0021] e. Prepare the SIC inner layer on the surface of the baked product crucible by CVD method, and densify the SIC inner lay...

Embodiment 2

[0024] A preparation method of graphite crucible, is characterized in that, comprises the steps:

[0025] a, adding in the container is 43% by weight of natural graphite, 12% by weight of silicon metal, 37% by weight of petroleum coke particles, stirring, the control stirring speed is 1200r / min, and then Adding the phenolic resin that weight percentage is 8% in container;

[0026] b. Continue to stir, control the stirring time to 25min, and use a pressure molding machine to form;

[0027] c. Put the shaped crucible green body into the crucible incinerator for roasting, control the roasting time to 15h, and the roasting temperature is 250°C to obtain the roasted product crucible;

[0028] d. Dry the crucible of the roasted product for 30 hours, and control the drying temperature to 150°C;

[0029] e. Prepare the SIC inner layer on the surface of the baked product crucible by CVD method, and densify the SIC inner layer.

[0030] The particle size of natural graphite is 500 me...

Embodiment 3

[0032] A preparation method of graphite crucible, is characterized in that, comprises the steps:

[0033] a, add the natural graphite that is 50% by weight, 10% metal silicon by weight, and 30% petroleum coke particles by weight in the container, stir, control the stirring speed to be 1500r / min, and then Adding the phenolic resin that weight percentage is 10% in container;

[0034] b. Continue to stir, control the stirring time to 30 minutes, and use a pressure molding machine to form;

[0035] c. Put the shaped crucible green body into a crucible incinerator for roasting, control the roasting time to 20 hours, and roast at a temperature of 300°C to obtain a roasted product crucible;

[0036] d. Dry the crucible of the roasted product for 40 hours, and control the drying temperature to 200°C;

[0037] e. Prepare the SIC inner layer on the surface of the baked product crucible by CVD method, and densify the SIC inner layer.

[0038] The particle size of natural graphite is 6...

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Abstract

The invention discloses a preparation method of a graphite crucible, which is characterized by comprising the following steps: a, adding 40-50wt% of natural graphite, 9-15wt% of metallic silicon and 30-40wt% of petroleum coke particle into a container, stirring, and then adding 8-15wt% of phenol formaldehyde resin into the container; b, further stirring, and molding with a compression molding machine; c, roasting the molded crucible green body, and controlling the roasting time at 10-20 hours to obtain a roasted crucible; d, drying the roasted crucible for 20-40 hours, and controlling the drying temperature at 100-200 DEG C; and e, preparing an SiC inner layer on the surface of the roasted crucible in the step d through a CVD (chemical vapor deposition) method, and densifying the SiC inner layer. The invention has the following advantages: the technological conditions are simple; the conditions are easy to implement; and the graphite crucible manufactured by the method has high product qualification rate, low resource waste rate and obvious energy saving effect.

Description

technical field [0001] The invention relates to a preparation method of a graphite crucible. Background technique [0002] Graphite crucible has been widely used in metallurgy, casting, machinery, chemical industry and other industrial sectors because of its good conductivity and high temperature resistance. The existing graphite crucible preparation methods have the disadvantages of complex procedures, large floor space, high energy consumption, low pass rate, and long production cycle, which cannot meet the needs of use. Therefore, a new technical solution should be provided to solve the above problems. Contents of the invention [0003] The object of the present invention is to provide a method for preparing a graphite crucible with small deformation, high pass rate and low resource consumption in view of the above deficiencies. [0004] In order to achieve the above object, the technical solution adopted in the present invention is: a preparation method of a graphite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C04B35/52C04B41/87
Inventor 周小兵
Owner 江苏海菱碳制品有限公司
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