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A method for preparing high-strength molded coke by cold pressing

A cold forming, high-strength technology, applied in building components, building insulation materials, construction, etc., can solve problems such as inability to provide high-temperature strength, health hazards to workers, loss of cohesion, etc., to improve high-temperature performance instability, Strengthen the anti-oxidation ability and improve the effect of adhesion

Active Publication Date: 2022-01-25
孝义诚远环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, xylene is a highly carcinogenic organic compound. Long-term production and operation in this environment will cause great harm to the health of workers.
Corn starch is an organic binder at room temperature, which can be converted into gelatinized starch at 70-90°C. Due to the higher viscosity of gelatinized starch, the mold scorch strength is further improved, but carbonization will occur above 200°C. Loss of cohesiveness, unable to provide high temperature strength

Method used

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  • A method for preparing high-strength molded coke by cold pressing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing high-strength form coke by cold pressing, characterized in that it comprises the following specific steps:

[0032] (1) Use a crusher to crush the coke powder to a particle size of less than 3mm;

[0033] (2) Mix the binder components, stir and mix well. The binder components include the following mass proportions: 0-20 parts of normal temperature binder, 60-80 parts of asphalt, 0-5 parts of asphalt modifier, and the strength of the coke 0-10 parts of stabilizer, 0-2 parts of starch gelatinization modifier;

[0034] (3) In the crusher, mix coke powder and binder components, adjust the ratio of coke powder and binder components, and the total ratio of binder is 8.6%-10.7% of the mass of coke powder;

[0035] (4) In the mixer, mix coke powder and binder components, add water and steam to obtain the final material, the temperature of the material at the outlet of the mixer is required to be 70-90°C, and the moisture content of the final material is ...

Embodiment 2

[0041] Example 2: The raw materials are metallurgical coke powder, 20 parts of cornstarch, 60 parts of high-temperature pitch, 4 parts of artificial graphite, 2 parts of sodium hydroxide, the total amount of binder is 8.6% of the mass of metallurgical coke, and others are the same as in Example 1. The coke drop strength is 7 times (1m) -1 , the cold strength is 1230N, and the high temperature compressive strength at 900°C is 1280N. The ash content of molded coke is 14.13%, volatile matter is 5.15%, fixed carbon is 78.53%, and the rest is water.

Embodiment 3

[0042] Example 3: The raw materials are metallurgical coke powder, 20 parts of cornstarch, 60 parts of high-temperature asphalt, 10 parts of magnesium oxide, 2 parts of sodium hydroxide, the total amount of binder is 9.2% of the mass of metallurgical coke, and the others are the same as in Example 1. The coke drop strength is 8 times (1m) -1 , the cold strength is 1280N, and the high temperature compressive strength at 900°C is 1210N. The molded coke has 14.54% ash, 5.93% volatile matter, 78.26% fixed carbon, and the rest is water.

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Abstract

The invention relates to a form coke forming process, and discloses a method for preparing high-strength form coke by cold pressing. The mass ratio of the binder used is: 0-20 parts of corn starch, 60-80 parts of asphalt, 0-5 parts of artificial graphite or boron compound, 0-10 parts of cement or magnesium oxide, 0-20 parts of ethyl acetate, 0-2 parts of sodium hydroxide. The total ratio of the binder is 8.6%-10.7% of the coke powder mass. Pre-mix the mixed binder and coke powder (metallurgical coke or petroleum coke), then add a certain amount of water, and often warm and cold press to obtain molded coke. The form coke prepared by the invention has excellent characteristics such as high cold and hot strength, good thermal stability, high molding rate and low cost.

Description

technical field [0001] The invention belongs to a coke molding process, and relates to a method for preparing a coke with high cold and hot strength by mixing a binder and coke powder at normal temperature and then pressing and molding. Background technique [0002] Form coke is made of waste coke powder as raw material, mixed with binder and then pressed into shape to prepare a product with certain mechanical strength and meet the needs of smelting. Pitch is an organic binder commonly used in the production of coke, in which the β resin can provide the cold strength of the coke, and high-temperature carbonization forms a carbon skeleton to provide the hot strength of the coke. However, since asphalt is solid at room temperature and has no bonding properties, it needs to be heated above the melting point to function as a binder. Chinese patent [Application No. CN201210139885.4] points out that the traditional asphalt addition method is to melt the asphalt at a temperature (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L3/02C08K13/02C08K3/04C08K3/22C08K3/24C08K3/38B29C43/00B29C43/02C08B30/18
CPCC08L95/00B29C43/003B29C43/02C08B30/18C08K2201/014C08K2003/222C08L3/02C08K13/02C08K3/04C08K3/22C08K3/24C08K3/38
Inventor 张斌
Owner 孝义诚远环保科技有限公司
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