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Method for roasting fine particle structure graphite products in open ring furnace and graphite products obtained by the method

A technology of graphite products and fine particles, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low yield and easy cracking, and achieve the goals of saving roasting costs, improving heat energy utilization, and ensuring roasting effects Effect

Active Publication Date: 2019-01-08
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that fine-grain structure graphite products are easily cracked by using an open-ring type roasting furnace, the present invention provides a method for roasting fine-grain structure graphite products in an open-ring type furnace and the obtained graphite products, using the roasting method of the present invention can not only improve the yield but also ensure that the product has a high volume density

Method used

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  • Method for roasting fine particle structure graphite products in open ring furnace and graphite products obtained by the method
  • Method for roasting fine particle structure graphite products in open ring furnace and graphite products obtained by the method
  • Method for roasting fine particle structure graphite products in open ring furnace and graphite products obtained by the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The circular charcoal products with a specification of φ550mm are roasted for the first time in an open ring roaster, and the steps are as follows:

[0022] 1) Furnace loading:

[0023] Furnace products: round charcoal products with a specification of φ550mm.

[0024] Filler: filler with a mass ratio of metallurgical coke:quartz sand=5.5:4.5.

[0025] Furnace charging operation: Carry out furnace charging according to the conventional furnace charging operation. (For conventional furnace charging operations, please refer to "Carbon Technology", Metallurgical Industry Press, 2012 edition, edited by Jiang Wenzhong)

[0026] There are no special restrictions on the specifications of the quartz sand in the filling material. The particle size range and respective proportions of metallurgical coke are shown in the following table:

[0027]

[0028] 2) Start the heating program and set the firing curve of the heating process as follows: at 150-350°C, the heating rate is ...

Embodiment 2

[0032] The circular charcoal products with a specification of φ1100mm are roasted for the first time in an open ring roaster, and the steps are as follows:

[0033] 1) Furnace loading:

[0034] Furnace products: round charcoal products with a specification of φ1100mm.

[0035] Filler: filler with a mass ratio of metallurgical coke:quartz sand=7.5:2.5.

[0036] Furnace charging operation: Carry out furnace charging according to the conventional furnace charging operation. (For conventional furnace charging operations, please refer to "Carbon Technology", Metallurgical Industry Press, 2012 edition, edited by Jiang Wenzhong)

[0037] The particle size range and respective proportions of metallurgical coke and quartz sand in the filler are shown in the table below:

[0038]

[0039] 2) Start the heating program and set the firing curve of the heating process as follows: at 150-350°C, the heating rate is 1.2°C / h; at 350-600°C, the heating rate is 0.7°C / h; at 600-750°C At 750...

Embodiment 3

[0043] The square charcoal products with a specification of 450mm×550mm are roasted for the first time in an open ring roaster, and the steps are as follows:

[0044] 1) Furnace loading:

[0045]Furnace products: cube products with specifications of 450mm×550mm.

[0046] Filling material: the mass ratio is a mixture of metallurgical coke: quartz sand = 7:3.

[0047] Furnace loading operation: Place the raw charcoal blocks roasted for the first time on the lower layer of the furnace, and place the charcoal blocks roasted twice or more times on the upper layer, and ensure that the distance between the charcoal products is kept at about 50mm. Finally, the impregnated product is loaded to protect against outgassing.

[0048] The particle size range and respective proportions of metallurgical coke and quartz sand in the filler are shown in the table below:

[0049]

[0050] 2) Start the heating program and set the firing curve of the heating process as follows: at 150-350°C, ...

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Abstract

The invention discloses a method for baking a fine-particle-structure graphite product with an open ring type furnace and the graphite product obtained by the method, and belongs to the field of graphite material manufacturing and processing. The method comprises the steps: charging, heating up, cooling and discharging, wherein a sintering curve for the heating-up step is controlled: when the temperature is 150-350 DEG C, the heating-up rate is 1.2-1.5 DEG C / h; when the temperature is 350-600 DEG C, the heating-up rate is 0.6-0.8 DEG C / h; when the temperature is 600-750 DEG C, the heating-up rate is 0.8-1.0 DEG C / h; and when the temperature is 750-1050 DEG C, the heating-up rate is 2.1-2.3 DEG C / h. The method meets the requirements for baking the fine-particle-structure graphite product, and the prepared graphite product has the advantages of high volume density and high finished product rate.

Description

technical field [0001] The invention belongs to the field of graphite material manufacturing and processing, and in particular relates to a method for roasting graphite products with fine particle structure in an open-ring furnace and graphite products obtained by the method. Background technique [0002] In the existing graphite production process, the first roasting of carbonaceous raw materials after molding is a very important process. The specific process is to place the carbonaceous blocks made of shaped carbonaceous raw materials in an underground roasting tunnel and carry out 1200-1500 ° C Roasting at high temperature. The purpose of roasting is to carbonize the medium-temperature pitch in the binder, form a coke grid between aggregate particles, and firmly bond aggregates of different particle sizes into a whole. As an important kiln in the roasting process, the open-type ring-type roasting furnace has the advantages of large output of processed products, energy sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205
Inventor 祁进君张培林赤九林张培模纪永良刘伟凯
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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