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Molten iron erosion-resisting blast furnace carbon brick and preparation method thereof

A technology of carbon bricks and blast furnaces, which is applied to blast furnaces, blast furnace details, blast furnace parts, etc., can solve the problems of accelerated erosion of hearth and bottom carbon bricks, affecting the production and life of blast furnaces, etc., to ensure safe production and improve corrosion resistance of molten iron Sexuality and the effect of prolonging the life of the blast furnace

Inactive Publication Date: 2012-01-18
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of the smelting intensity of the blast furnace, the erosion of the hearth bottom carbon brick is accelerated, which has become a key factor affecting the production and life of the blast furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] It is prepared from the following raw materials by weight percentage: Si powder 10%, α-Al 2 o 3 4%, corundum 8%, binder 20%, and the balance is carbon brick base material.

[0020] (1), Si powder 10%, α-Al 2 o 3 4%, corundum 8% and carbon brick base material mixed evenly;

[0021] (2), grind the uniformly mixed raw materials into fine powder;

[0022] (3), roasting the ground raw material fine powder at a temperature higher than 1450°C;

[0023] (4), after roasting, add 20% binder by weight, and then send it into an extruder for extrusion molding.

Embodiment 2

[0025] It is prepared from the following raw materials by weight percentage: Si powder 8%, α-Al 2 o 3 3%, corundum 6%, binder 15%, and the balance is carbon brick base material.

[0026] (1), Si powder 8%, α-Al 2 o 3 3%, corundum 6% and carbon brick base material mixed evenly;

[0027] (2), grind the uniformly mixed raw materials into fine powder;

[0028] (3), roasting the ground raw material fine powder at a temperature higher than 1500°C;

[0029] (4), add the binding agent that is 15% by weight after roasting, then send into extrusion machine and carry out extrusion molding.

Embodiment 3

[0031] It is prepared from the following raw materials by weight percentage: Si powder 12%, α-Al 2 o 3 6%, corundum 10%, binder 25%, and the balance is carbon brick base material.

[0032] (1), Si powder 12%, α-Al 2 o 3 6%, corundum 10% and carbon brick base material mixed evenly;

[0033] (2), grind the uniformly mixed raw materials into fine powder;

[0034] (3), roasting the ground raw material fine powder at a temperature higher than 1500°C;

[0035] (4), add the binding agent that is 25% by weight after roasting, then send into extrusion machine and carry out extrusion molding.

[0036] The comparative experiment results are as follows:

[0037] serial number

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PUM

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Abstract

The invention relates to a refractory material for the lining of a blast furnace, in particular to a molten iron erosion-resisting blast furnace carbon brick and a preparation method thereof. The carbon brick is prepared from the following raw materials by weight percent: 8 to 12 percent of Si powder, 3 to 6 percent of alpha-Al2O3, 6 to 10 percent of corundum, 15 to 25 percent of bonding agent and the balance of carbon brick base materials. The invention can greatly reduce the erosion rate of molten iron of the carbon brick from nearly 30 percents to 15 percent and below 15 percent, prolong the service life of the blast furnace and guarantee the safe production of the blast furnace. The invention is suitable for half-graphite carbon bricks, microporous carbon bricks and ultramicropore carbonbricks, and improves the molten iron erosion resistance of the carbon blocks.

Description

technical field [0001] The invention relates to a blast furnace lining refractory material, in particular to a blast furnace carbon brick with corrosion resistance to molten iron corrosion and a preparation method thereof. Background technique [0002] Since 1958, my country's blast furnaces have begun to use integrated furnace bottoms, and the hearth ring wall has used carbon bricks. Since the 1970s, some blast furnaces have used water-cooled carbon brick bottoms. The life of a blast furnace with this structure can reach 10 years under normal circumstances. above. However, with the continuous improvement of blast furnace smelting intensity, the erosion of hearth and bottom carbon bricks is accelerated, which has become a key factor affecting the production and life of blast furnaces. The results of blast furnace damage investigation show that the most severely eroded parts of hearth and furnace bottom carbon bricks are the circumferential side walls and furnace bottom carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C21B7/04
Inventor 邹祖桥宋木森唐德明
Owner 武钢集团有限公司
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