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A kind of composite magnesia-carbon brick and preparation method thereof

A composite magnesia-carbon brick and binder technology, which is applied in the field of refractory materials, can solve the problems of difficult production, high price, and high manufacturing cost, and achieve the effects of high refractoriness, low solubility, and low thermal conductivity

Active Publication Date: 2020-08-11
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, domestic and foreign magnesia-carbon brick manufacturers have made great progress in strengthening the research on the performance of magnesia-carbon bricks. The existing magnesia-carbon bricks mainly use nano-systems and additives to improve various properties of products, such as: adding nano-oxidized Zinc, B4C-C composite powder and nano-TiC powder, nano-scale non-oxide (including nitride, sialon or boride), etc., although these methods solve certain problems, they are expensive and have high manufacturing costs. Industrial production is difficult

Method used

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  • A kind of composite magnesia-carbon brick and preparation method thereof
  • A kind of composite magnesia-carbon brick and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The method of using composite additives to strengthen the preparation of magnesia carbon bricks is as follows.

[0026] Step 1. Prepare aggregate: 45% of regenerated magnesia-carbon bricks with a particle size of 1-10mm, 5% of fused magnesia with a particle size of 3-5mm, 10% of fused magnesia with a particle size of 1-3mm, and fused magnesia with a particle size of 0.1-1mm Magnesia 15%, mixed according to the required ratio, set aside.

[0027] Step 2. Preparation of premixed powder: fused magnesia fine powder with a particle size of 0.1 μm-88 μm, the percentage by weight is 10%; Bonite fine powder (calcium hexaaluminate (CA6)) 4%, metal Aluminum fiber 0.5%, magnesium-forsterite synthetic sand fine powder 2% synthetic sand fine powder; asphalt powder 0.5%, metal silicon powder 1.5%, metal aluminum-magnesium alloy powder 1.5%, pre-mixed in proportion for later use.

[0028] Step 3, mixing: add the aggregate and premixed powder in step 1 and step 2, the particle size is...

Embodiment 2

[0038] A method for enhancing the preparation of magnesia carbon bricks with composite additives.

[0039] Step 1. Prepare aggregate: 50% of regenerated magnesia-carbon bricks with a particle size of 1-10mm, 5% of fused magnesia with a particle size of 3-5mm, 5% of fused magnesia with a particle size of 1-3mm, and fused magnesia with a particle size of 0.1-1mm 10% magnesia, mixed according to the required ratio, set aside.

[0040] Step 2. Preparation of pre-mixed powder: fused magnesia fine powder with a particle size of 0.1 μm-88 μm, the weight percentage is 9%; Bonite fine powder (calcium hexaaluminate (CA6)) 3%, metal Aluminum fiber 0.5%, magnesium-forsterite synthetic sand fine powder 2% synthetic sand fine powder; asphalt powder 1%, metal silicon powder 1%, metal aluminum-magnesium alloy powder 1.5%, pre-mix according to the proportion, and set aside.

[0041] Step 3, mixing: Add the aggregate and mixed powder in step 1 and step 2, 8% of graphite with a particle size of...

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Abstract

The invention belongs to the field of refractory matters, and in particular relates to a composite magnesia carbon brick and a preparation method thereof. The composite magnesia carbon brick comprises the following raw materials in percentage by weight: 40-50% of regenerated magnesia carbon bricks, 25-40% of fused magnesite, 3-6% of Bonite fine powder, 0.5-2% of metallic aluminum fibers, 2-5% of magnesium-forsterite synthetic sand fine powder, 0.5-1% of asphalt powder, 1-5% of an anti-oxidation additive, 1-10% of graphite and 1-8% of fused quartz, wherein an external binding agent accounts for 2.8-3% of the total weight of the raw materials. The composite magnesia carbon brick is good in high temperature resistance and corrosion resistance, and is relatively good in thermal shock resistance.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to a composite magnesia-carbon brick and a preparation method thereof. Background technique [0002] As the iron and steel industry vigorously develops the refining process outside the furnace, the output of pure steel, stainless steel, low carbon steel and ultra-low carbon steel is getting higher and higher. The process of producing clean steel requires strict control of the carbon content in refractory materials, reducing carbon-containing linings to add carbon to the steel, and requiring that the total carbon content of the lining should not exceed 6%, which can significantly reduce the thermal conductivity of the material and reduce heat loss. Meet the requirements of the secondary refining process. Traditional magnesia-carbon bricks are no longer suitable for the new requirements of refractory materials in the development of smelting technology. How to develop a brick that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043C04B35/76
CPCC04B35/043C04B35/76C04B2235/3208C04B2235/3217C04B2235/3418C04B2235/3826C04B2235/402C04B2235/425C04B2235/428C04B2235/77C04B2235/96C04B2235/9607
Inventor 王树山金耀东关彦王利付伟付宇张君
Owner LIAONING ZHONGMEI HLDG
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