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Preparation process of carbon-free steel packing refractory bricks

A preparation process, a technology of carbon-free ladle, applied in the field of iron and steel metallurgy, can solve the problems of low service life, thermal shock resistance, weak erosion resistance, high thermal conductivity, and achieve excellent erosion resistance, good resistance to salt-alkali erosion Excellent effect of ability and thermal insulation performance

Inactive Publication Date: 2014-05-14
WUXI CHENGBO SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of the existing ladle prefabricated block is still relatively high, its thermal shock resistance and erosion resistance are still weak, and its service life is low, which cannot fully meet the requirements of ladle refining production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A process for preparing a carbon-free steel-lined refractory brick. The refractory brick consists of the following components in parts by weight: 16 parts of 7-10mm white corundum particles, 22 parts of 4-7mm white corundum particles, 6 parts of 1-4mm white corundum particles parts, -200 mesh α-Al 2 o 3 5 parts, 6 parts of -200 mesh fused aluminum magnesium spinel powder, 7 parts of -200 mesh magnesium oxide, 2 parts of -200 mesh metal aluminum powder, 2.5 parts of sodium hexametaphosphate, 3 parts of magnesium chloride solution with a concentration of 25%, wood 1.5 parts of sodium sulfonate, described preparation method comprises the steps:

[0018] 1) Put the three kinds of white corundum particles into the mixer and mix them for 5 minutes, then take them out for later use;

[0019] 2) Add α-Al 2 o 3 , Fused aluminum-magnesium spinel powder, magnesium oxide and metal aluminum powder are put into the mixer and mixed for 10 minutes;

[0020] 3) Add the mixture pre...

Embodiment 2

[0023] A process for preparing a carbon-free steel-laden lined refractory brick. The refractory brick consists of the following components in parts by weight: 18 parts of 7-10mm white corundum particles, 20 parts of 4-7mm white corundum particles, 8 parts of 1-4mm white corundum particles parts, -200 mesh α-Al 2 o 3 3 parts, 8 parts of -200 mesh fused aluminum magnesium spinel powder, 5 parts of -200 mesh magnesium oxide, 4 parts of -200 mesh metal aluminum powder, 1.5 parts of sodium hexametaphosphate, 5 parts of magnesium chloride solution with a concentration of 25%, wood 0.5 part of sodium sulfonate, described preparation method comprises the steps:

[0024] 1) Put the three kinds of white corundum particles into the mixer and mix them for 8 minutes, then take them out for later use;

[0025] 2) Add α-Al 2 o 3 , Fused aluminum-magnesium spinel powder, magnesium oxide and metal aluminum powder are put into the mixer and mixed for 15 minutes;

[0026] 3) Add the mixtur...

Embodiment 3

[0029] A process for preparing a carbon-free steel-lined refractory brick. The refractory brick consists of the following components in parts by weight: 17 parts of 7-10mm white corundum particles, 21 parts of 4-7mm white corundum particles, 7 parts of 1-4mm white corundum particles parts, -200 mesh α-Al 2 o 3 4 parts, 7 parts of -200 mesh fused aluminum magnesium spinel powder, 6 parts of -200 mesh magnesium oxide, 3 parts of -200 mesh metal aluminum powder, 2 parts of sodium hexametaphosphate, 4 parts of magnesium chloride solution with a concentration of 25%, wood 1 part of sodium sulfonate, described preparation method comprises the steps:

[0030] 1) Put the three kinds of white corundum particles into the mixer and mix them for 6.5 minutes, then take them out for later use;

[0031] 2) Add α-Al 2 o 3 , Fused aluminum-magnesium spinel powder, magnesium oxide and metal aluminum powder were put into the mixer and mixed for 13 minutes;

[0032] 3) Add the mixture prepa...

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PUM

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Abstract

The invention discloses a preparation process of carbon-free steel packing refractory bricks, which comprises the following steps: 1) mixing 16-18 parts of 7-10mm white corundum particles, 20-22 parts of 4-7mm white corundum particles and 6-8 parts of 1-4mm white corundum particles in a mixer for 5-8 minutes; 2) mixing 3-5 parts of alpha-Al2O3 of -200 meshes, 6-8 parts of fused aluminum-magnesium spinel powder of -200 meshes, 5-7 parts of magnesium oxide of -200 meshes and 2-4 parts of metal aluminum powder of -200 meshes in a mixer for 10-15 minutes; 3) adding the mixture prepared in the step 1) into the mixer in the step 2), mixing for 10-15 minutes, adding 1.5-2.5 parts of sodium hexametaphosphate, 3-5 parts of 25% magnesium chloride solution and 0.5-1.5 parts of sodium lignin sulfonate, and mixing for 10-15 minutes before discharge; 4) aging for 1-2 hours, performing compression moulding with a press, and drying for 24 hours in a drying kiln at 200 DEG C.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a preparation process of a carbon-free steel-laden-lined refractory brick. Background technique [0002] With the development of out-of-furnace refining and continuous casting technology, the ladle has gradually changed from a single-function molten steel container to an out-of-furnace molten steel refining equipment with complex functions. The prolongation of the residence time of molten steel in the ladle and the increase of tapping temperature make the working environment of the ladle more harsh. In order to adapt to changes in the working environment of ladles, alumina-magnesia carbon bricks and aluminum-rich spinel carbon bricks are generally used in domestic ladles. However, the ladle lined with aluminum-magnesium-carbon bricks and aluminum-rich spinel carbon bricks has high thermal conductivity, and the temperature of molten steel drops rapidly, which is...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 李飞
Owner WUXI CHENGBO SCI & TECH DEV
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