Microwave sintering method of clay-graphite crucible

A graphite crucible and microwave sintering technology, which is applied in the field of clay graphite crucible preparation, can solve the problems of low production efficiency and high labor intensity, and achieve the effects of short sintering time, improved utilization rate, and safe and pollution-free production environment

Inactive Publication Date: 2011-09-07
宜昌浩诚工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It takes 4 hours to sinter in the traditional smoke kiln, the prod

Method used

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  • Microwave sintering method of clay-graphite crucible
  • Microwave sintering method of clay-graphite crucible

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The clay and graphite are prepared according to the formula ratio, and then fully mixed and aged to obtain a mud material with good molding properties. Then 30g of mud is pressed into a small-volume model with the same proportion as the actual clay-graphite crucible product, and placed in a vacuum drying oven for low-temperature drying. After the drying is completed, glaze the outer surface of the sample 6 and dry it, put the dried sample 6 into the small corundum crucible 5, press figure 1 The medium structure is put into the microwave oven 3 for sintering, the microwave frequency is 2450HMz, the output power adjustment range is 500-2000W, and the temperature rise curve of the sample 6 is controlled appropriately, and the sintering time is 1.5h; after the sintering is completed, the sample 6 is cooled with the furnace. The completion of sintering was preliminarily judged by the amount of water loss, and then the strength and hardness of sample 6 after sintering were co...

Embodiment 2

[0029] The clay and graphite are prepared according to the formula ratio, and then fully mixed and aged to obtain a mud material with good molding properties. Then 50g of mud is pressed into a small-volume model with the same proportion as the actual clay-graphite crucible product, and placed in a vacuum drying oven for low-temperature drying. After the drying is completed, glaze the outer surface of the sample 6 and dry it, put the dried sample 6 into the small corundum crucible 5, press figure 1 The medium structure is put into the microwave oven 3 for sintering, the microwave frequency is 2450HMz, the output power adjustment range is 500-2000W, the temperature rise curve of the sample 6 is controlled properly, and the sintering time is 2h; after the sintering is completed, the sample 6 is cooled with the furnace. The completion of sintering was preliminarily judged by the amount of water loss, and then the strength and hardness of sample 6 after sintering were compared with...

Embodiment 3

[0031] The clay and graphite are prepared according to the formula ratio, and then fully mixed and aged to obtain a mud material with good molding properties. Then 100g of mud is pressed into a small-volume model with the same proportion as the actual clay-graphite crucible product, and placed in a vacuum drying oven for low-temperature drying. After the drying is completed, glaze the outer surface of the sample 6 and dry it, put the dried sample 6 into the small corundum crucible 5, press figure 1 The medium structure is put into the microwave oven 3 for sintering, the microwave frequency is 2450HMz, the output power adjustment range is 500-3000W, and the temperature rise curve of the sample 6 is controlled appropriately, and the sintering time is 1.5h; after the sintering is completed, the sample 6 is cooled with the furnace. The completion of sintering was preliminarily judged by the amount of water loss, and then the strength and hardness of sample 6 after sintering were c...

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Abstract

The invention relates to a microwave sintering method of a clay-graphite crucible, which comprises the following steps: mixing materials, aging, forming, glazing, carrying out vacuum drying to obtain a sample, putting the sample into a thermal insulator, and sintering in a microwave oven. The invention utilizes microwaves to heat and sinter the clay-graphite crucible so as to maximally increase the utilization ratio of energy sources, thereby greatly shortening the sintering time. In addition, since microwave heating has favorable uniformity, the invention can greatly enhance the quality stability of the sintered product.

Description

technical field [0001] The invention belongs to the field of clay graphite crucible preparation, in particular to a microwave sintering method of clay graphite crucible. Background technique [0002] Clay graphite crucible is a refractory graphite crucible mainly used in smelting special alloy steel, melting non-ferrous metals and their alloys, which is made of crystalline natural graphite as the main raw material, plastic refractory clay as binder, and mixed with different types of clinker. . In terms of product performance and usage, graphite crucible is an important part of refractory materials, and is widely used in non-ferrous metal smelting, casting, machinery, chemical and other industries. [0003] In the existing domestic production field, the clay graphite crucible is in a backward position with low efficiency, low quality, high energy consumption and high pollution, especially the sintering process. The traditional sintering process uses fossil fuels as energy s...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 郝成靳松
Owner 宜昌浩诚工贸有限公司
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