Low-temperature carbonization method of directly heating formed coke

A low-temperature carbonization and heating technology, which is used in the coking of carbon-containing materials, coke ovens, petroleum industry, etc., can solve the problems of increasing production costs and complicating the process flow of coke, so as to improve the coking value, shorten the carbonization and coking time, Effect of promoting thermal decomposition polycondensation behavior

Active Publication Date: 2012-10-31
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the above considerations, the coke process is complicated and the production cost is greatly increased.

Method used

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  • Low-temperature carbonization method of directly heating formed coke
  • Low-temperature carbonization method of directly heating formed coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: 10% coal tar pitch with a mass ratio of 10% and fine coke powder with a mass ratio of 10% are pre-co-milled. After co-grinding, the volume average particle size of the powder is less than 30.0 μm, and the asphalt particle size is less than 0.15 mm. Then mix it with coke powder with a mass ratio of 80% and a particle size of -5mm, and then add water accounting for 10% of the total mass of the mixed material and xylene accounting for 20% of the asphalt mass, and mix again, and often warm and compact Forming and volatilization treatment at 370°C for 20 minutes to obtain volatile blocks, and finally put the volatile blocks in N 2 Formed coke was obtained by carbonizing at 600°C for 30 minutes in an ordinary electric resistance furnace under atmosphere. The compressive strength of the coke is 18.8Mpa.

Embodiment 2

[0023] Embodiment 2: the volatilization block among the embodiment 1 is in CO 2 Formed coke was obtained by carbonizing at 600°C for 30 minutes in an ordinary electric resistance furnace under atmosphere. The compressive strength of the coke is 19.1Mpa.

Embodiment 3

[0024] Example 3: Take the volatile block in Example 1, and carbonize the volatile block in an ordinary electric resistance furnace at 600° C. for 30 minutes in an air atmosphere to obtain a carbonized block with a compressive strength of 18.1 MPa.

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Abstract

The invention discloses a low-temperature carbonization method of directly heating formed coke. The low-temperature carbonization method comprises the steps of: performing advanced co-grinding treatment on asphalt and a certain amount of powder material (the powder material is coke powder or pulverized coal); then adding the mixture into the coke powder to be mixed uniformly; then adding a certain amount of water and a dimethylbenzene activator in the uniformly mixed material; performing normal-temperature briquetting forming and volatilization treatment; and finally directly heating the formed coke to realize low-temperature carbonization of the formed coke, thereby obtaining the carbonized formed coke. Through the measures, the low-temperature carbonization and solidification of the formed coke is realized through direct heating on the premise that the quality of the formed coke is guaranteed. Only by pre-treating the raw materials, can the formed coke be carbonized at low temperature by direct heating under an air, nitrogen or carbon dioxide atmosphere; therefore, the low-temperature carbonization method of directly heating the formed coke, disclosed by the invention, has the advantages of simplifying the subsequent process flow, reducing the production cost and breaking the limitation that the formed coke in the traditional formed coke process must be indirectly heated to a high temperature for the carbonization under a sealing condition.

Description

technical field [0001] The invention belongs to the technical field of coke powder molding, and relates to a form coke process using pitch as a binder, in particular to a method for direct low-temperature carbonization of form coke in an air atmosphere. Background technique [0002] Form coke is made of waste coke powder as raw material, mixed with binder, kneaded, stirred, pressed and formed, and then carbonized to prepare a form with a certain degree of lumpiness, certain mechanical strength, and meeting the requirements of smelting applications. Form coke products are used for industrial or civil block fuel and gasification raw materials, and can also replace conventional coke for ironmaking and foundry industries. Due to the advantages of continuous production, less pollution, and high degree of automation, many countries have invested a lot of research and development for a long time. At present, more than 20 types of coke processes have been developed in the world. Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/06C10B55/02
Inventor 杨永斌李骞姜涛钟强郭宇峰郑琼香陈丽娟李光辉范晓慧黄柱成白国华
Owner CENT SOUTH UNIV
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