Low-iron low-aluminum mullite brick for coke oven and preparation method thereof

A mullite brick and coke oven technology, which is applied in the field of refractory materials for coke oven regenerators, can solve the problems of coke oven dust adsorption, small expansion and contraction deformation, etc., and achieve the effect of avoiding deformation and reducing adsorption

Active Publication Date: 2017-08-11
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the said product is used in the coke oven atmosphere, because it is added with silicon carbide, it is difficult to ensure that the coke oven requires less dust adsorption, and the ex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A low-iron and low-aluminum mullite brick for coke ovens, which includes raw material composition and weight percentage content: calcined kaolin clinker with a particle size greater than 1 to ≤5mm: 40%; calcined kaolin with a particle size greater than 0.1mm to ≤1mm Clinker: 15%, calcined kaolin clinker fine powder with a particle size of ≤0.088mm: 35%, of which calcined kaolin fine powder with a particle size of <0.01mm accounts for 8%; clay powder with a particle size of ≤0.088mm: 9.5%; binder - Methyl hydroxymethyl cellulose 0.5%; and add water according to 2% of the total amount of the above raw materials; in the total raw materials: the total amount of potassium oxide and sodium oxide is 0.7%, and the total amount of metallic iron and iron oxide is 1.0%;

[0032] Preparation steps:

[0033] 1) Calcined kaolin clinker with particle size greater than 1 to ≤5mm: 40%; calcined kaolin clinker with particle size greater than 0.1mm to ≤1mm: 15%, calcined kaolin clinker fi...

Embodiment 2

[0038] A low-iron and low-aluminum mullite brick for coke ovens, which includes raw material composition and weight percentage content: calcined kaolin clinker with a particle size greater than 1 to ≤5mm: 60%; calcined kaolin with a particle size greater than 0.1mm to ≤1mm Clinker: 8%, calcined kaolin clinker fine powder with particle size ≤0.088mm: 21.9%, of which calcined kaolin fine powder with particle size<0.01mm accounted for 5%; clay powder with particle size ≤0.088mm 5%; binder- Methyl hydroxymethyl cellulose 0.1%, pyrophyllite powder with particle size <0.088mm 5%; add water according to 3% of the total amount of the above raw materials; in the total raw materials: the total amount of potassium oxide and sodium oxide is 0.59%, metal iron And the total amount of iron oxide is 0.8%;

[0039] Preparation steps:

[0040] 1) First calcined kaolin clinker with a particle size greater than 1 to ≤5mm: 60%; calcined kaolin clinker with a particle size greater than 0.1mm to ≤1...

Embodiment 3

[0045] A low-iron and low-aluminum mullite brick for coke ovens, which includes raw material composition and weight percentage content: calcined kaolin clinker with a particle size greater than 1 to ≤5mm: 48%; calcined kaolin with a particle size greater than 0.1mm to ≤1mm Clinker: 12%, calcined kaolin clinker fine powder with particle size ≤0.088mm: 15%, of which calcined kaolin fine powder with particle size <0.01mm accounted for 3%; clay powder with particle size ≤0.088mm 7%; binder- Dextrin powder 3%, pyrophyllite powder with particle size <0.088mm 15%; add water according to 1% of the total amount of the above raw materials; in the total raw materials: the total amount of potassium oxide and sodium oxide is 0.5%, metal iron and iron oxide The total amount is 0.88%;

[0046] Preparation steps:

[0047] 1) Calcined kaolin clinker with particle size greater than 1 to ≤5mm: 48%; calcined kaolin clinker with particle size greater than 0.1mm to ≤1mm: 12%, calcined kaolin fine ...

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PUM

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Abstract

A low-iron low-aluminum mullite brick for a coke oven comprises, by wt%, 40-60% of calcined kaolin clinker with the particle size larger than 1 mm and equal to or smaller than 5 mm, 8-15% of calcined kaolin clinker with the particle size larger than 0.1 mm and equal to or smaller than 1 mm, 15-35% of calcined kaolin clinker fines with the particle size equal to or smaller than 0.088 mm, 5-15% of clay powder with the particle size equal to or smaller than 0.088 mm and 0.1-3% of methyl cellulose, and water accounting for 1-3.5% the total weight of the raw materials is added. A preparation method comprises the steps of mixing powders of the raw materials; adding water and evenly mixing the mixing powders of the raw materials; and performing pressurization forming and drying firing. The low-iron low-aluminum mullite brick for the coke oven can reduce adsorption, permeation and reaction of dust in a coke oven heat storage chamber, deformation and foaming in use are avoided, the thermal destruction resistance is improved, so that the recycling times are no less than 20 times under 1000 DEG C water cooling, and refractoriness under load is not lower than 1400 DEG C. By trial in the 7.63-meter coke oven, a phenomenon that black smoke is produced and a furnace temperature is abnormal does not occur yet.

Description

technical field [0001] The invention relates to a refractory material for a metallurgical furnace and a preparation method thereof, and specifically belongs to a refractory material for a coke oven regenerator used in the coking industry and a refractory material for checker bricks in other regenerators and a preparation method thereof. Background technique [0002] The service life of coke ovens is long, and some even reach ten years. In existing coke ovens, clay bricks, semi-silica bricks, and silica bricks are generally used in the working layer of the coke oven regenerator, which are mature refractory products. Therefore, people often ignore the performance and application research of refractories used in coke ovens. In recent years, due to factors such as enhanced smelting, the coking time of some coke ovens has been shortened to more than 20 hours. Its coking time is short, which means that the number of cold and hot cycles increases, which leads to more damage to th...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B33/13
CPCC04B33/13C04B35/66C04B2235/5427C04B2235/5436C04B2235/72
Inventor 徐国涛盛军波冯强杨帆陈胜春张洪雷刘黎
Owner 武汉钢铁有限公司
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