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One-time roasting method for isostatic graphite product

A graphite product and secondary roasting technology, which is applied in the field of primary roasting of static pressure graphite products, can solve the problems of cracks in small particles and low yield, and achieve the effects of overcoming cracks, increasing coking rate, and ensuring comprehensive indicators and yield

Inactive Publication Date: 2015-04-01
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for roasting isostatic graphite products, which can effectively improve the yield of the primary roasting stage, and overcome the problems of cracks and low yield caused by small particles

Method used

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  • One-time roasting method for isostatic graphite product
  • One-time roasting method for isostatic graphite product
  • One-time roasting method for isostatic graphite product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The compacted green body is put into a sagger and roasted once, wherein, the first roasting is divided into the following three heating stages:

[0031] At 100-300°C, the heating rate is 0.5°C / h;

[0032] At 300-650°C, the heating rate is 0.2°C / h;

[0033] At 650-1000°C, the heating rate is 1.0°C / h.

Embodiment 2

[0035] The compacted green body is put into a sagger and roasted once, wherein, the first roasting is divided into the following three heating stages:

[0036] At 100-300°C, the heating rate is 1.0°C / h;

[0037] At 300-650°C, the heating rate is 0.3°C / h;

[0038] At 650-1000°C, the heating rate is 1.5°C / h.

Embodiment 3

[0040] The compacted green body is put into a sagger and roasted once, wherein, the first roasting is divided into the following three heating stages:

[0041] At 100-300°C, the heating rate is 0.8°C / h;

[0042] At 300-650°C, the heating rate is 0.25°C / h;

[0043] At 650-1000°C, the heating rate is 1.2°C / h.

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Abstract

The invention belongs to the field of processing of isostatic graphite materials, and in particular relates to a one-time roasting method for an isostatic graphite product. The one-time roasting method for the isostatic graphite product comprises the step of performing one-time roasting on a pressed green body in a sagger, wherein the one-time roasting includes three temperature rising stages: when the temperature is 100-300 DEG C, temperature rising rate is 0.5-1.0 DEG C / h; when the temperature is 300-650 DEG C, temperature rising rate is 0.2-0.3 DEG C / h; when the temperature is 650 -1000 DEG C, temperature rising rate is 1.0-1.5 DEG C / h. Compared with the prior art, by optimizing and improving the temperature rising curve, heating duration and like factors of the one-time roasting, the method disclosed by the invention can be used for improving the coking rate of a binder, and the method can be also used for overcoming the shortcomings of crack and low product rate caused by small particles.

Description

technical field [0001] The invention belongs to the field of manufacturing and processing of isostatic graphite materials, and in particular relates to a primary roasting method of isostatic graphite products. Background technique [0002] Isostatic graphite is a new type of carbon graphite material developed in the 1960s. Because of its high temperature resistance, corrosion resistance, high strength, good electrical and thermal conductivity, self-lubrication, low thermal expansion coefficient and high temperature Maintaining good strength and other properties, it is widely used in high-tech fields such as machinery, chemicals, electronics, aerospace and nuclear industries. [0003] Due to the very fine particle size and different molding processes of isostatic pressed products, the process of preparing isostatic graphite is fundamentally different from the production process of medium and coarse graphite products. The kiln for firing medium and coarse graphite products is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 张培模张培林赤九林张日清祁进君钱晶荣杨晓峰
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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