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Process for producing MgO-C Bricks by using waste MgO-C Bricks as main raw material

A technology of waste magnesia-carbon bricks and magnesia-carbon bricks, which is applied in the field of producing magnesia-carbon bricks with waste magnesia-carbon bricks as the main raw material, which can solve the problems of waste of graphite resources, increase of production costs, energy consumption, etc. The effect of volume and removal of industrial waste

Inactive Publication Date: 2008-12-31
ZHENGZHOU ZHENDONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since graphite itself is also a high-quality non-renewable resource, carbon removal treatment will inevitably cause waste of graphite resources, and also consume energy, pollute the environment, and increase production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for producing magnesia-carbon bricks using waste magnesia-carbon bricks as the main raw material of the present invention is to use 62 parts of waste magnesia-carbon bricks as the main raw material; 25 parts of fused magnesia, 22 parts of sintered magnesia; 1 part of high-temperature asphalt powder (particle size not greater than 0.088mm), 5 parts of synthetic antioxidant (particle size not greater than 0.074mm), 2 parts of metal silicon powder (particle size not greater than 0.074mm), 7 parts of graphite (grade -195) produced according to the following steps:

[0023] (1) Sorting and homogenization: Classify the recycled waste magnesia-carbon bricks, remove steel slag, soil or other impurities, and mix them in batches of about 120 tons, so that the proportion of waste bricks of the same material and different components tend to balance;

[0024] (2) Crushing: The homogenized waste magnesia carbon bricks are broken into granules and powders below φ10mm, where...

Embodiment 2

[0028] The method for producing magnesia-carbon bricks using waste magnesia-carbon bricks as the main raw material of the present invention comprises 80 parts of waste magnesia-carbon bricks as the main raw material; 20 parts of sintered magnesia; 2 parts of high-temperature pitch powder (with a particle size not greater than 0.088mm) , 2 parts of metal silicon powder (particle size not greater than 0.074mm), 2 parts of graphite (brand is -195) produced according to the following steps:

[0029] (1) Sorting and homogenization: Classify the recycled waste magnesia-carbon bricks, remove steel slag, soil or other impurities, and mix them in batches of about 120 tons, so that the proportion of waste bricks of the same material and different components tend to balance;

[0030] (2) Crushing: The homogenized waste magnesia-carbon bricks are broken into granules and powders below φ10mm, wherein φ10-φ3mm granules account for 47%, φ3-φ0.074mm granules account for 24%, φ0 Powder below ...

Embodiment 3

[0034] The method for producing magnesia-carbon bricks with waste magnesia-carbon bricks as the main raw material of the present invention is to use 98 parts of main raw material waste magnesia-carbon bricks; 2 parts of seawater magnesia (particle size is not more than 1mm); 0.2 part of metal magnesium powder ( particle size not greater than 0.074mm) produced according to the following steps:

[0035] (1) Sorting and homogenization: Classify the recycled waste magnesia-carbon bricks, remove steel slag, soil or other impurities, and mix them in batches of about 120 tons, so that the proportion of waste bricks of the same material and different components tend to balance;

[0036] (2) Crushing: The homogenized waste magnesia carbon bricks are broken into granules and powders below φ9mm, wherein φ9mm-φ3mm granules account for 46%, φ3-φ0.074mm granules account for 24%, φ0 Powder below .074mm accounts for 30%;

[0037] (3) Mixing: Add the crushed waste magnesia-carbon brick granu...

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Abstract

The invention discloses a method which uses waste magnesia-carbon bricks as main raw materials to produce magnesia-carbon bricks; the method uses and processes 62-98 portions of waste magnesia-carbon bricks as main raw materials, 0-47 portions of magnesia, and 0.2-15 portions of additives through the following steps: (1), selection and homogenization: classifying and sorting the reclaimed waste magnesia-carbon bricks, doping the bricks based on batches, so that the proportions of the reclaimed waste bricks with same material and different components can tend to balance; (2) crushing: breaking the homogenized waste magnesia-carbon bricks into granular materials and powder materials, with the diameter Phi below 12mm; (3) mixing: adding the crushed granular materials and powder materials of the waste magnesia-carbon bricks, the magnesia, as well as the additives sequentially into a mixer, and adding a right amount of bonding agent based on the total amount of the materials, then mixing all the components uniformly; (4) forming: pressing and forming the evenly mixed moist materials on a press, and drying the formed materials in a furnace, maintaining the dried materials for 12 hours at 110-250 DEG C so as to obtain the finished product.

Description

technical field [0001] The invention relates to a production method of magnesia-carbon bricks, in particular to a method for producing magnesia-carbon bricks with waste magnesia-carbon bricks as the main raw material. Background technique [0002] Magnesia-carbon bricks are used as refractory bricks for steel kilns. With the rapid development of my country's steel industry, the annual consumption of magnesia-carbon bricks has reached more than 1.8 million tons, and at least 630,000 tons of waste magnesia-carbon bricks have been scrapped after use. These Industrial waste not only takes up a lot of space, but also pollutes the environment. The invention patent declared by our company on September 22, 2005 (named: Recycling method of waste magnesia carbon bricks, patent number: 200510018029.3) discloses a method of decarbonizing waste magnesia carbon bricks (that is, waste magnesia carbon bricks The graphite contained in the brick is removed) to obtain recycled materials, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 侯振东
Owner ZHENGZHOU ZHENDONG TECH
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