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Small blast furnace main iron runner castable

A technology of castables and main iron channels, which is applied in the field of metallurgical refractory materials, can solve the problems of stable and safe production of blast furnaces, poor thermal shock resistance, and thermal spalling structures, etc., to reduce the amount of admixtures, high thermal shock resistance, Effect of improving thermal shock resistance

Inactive Publication Date: 2015-06-10
占丽青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of castable with brown corundum as the main component has poor thermal shock resistance, which is easy to cause thermal spalling and structural spalling, which greatly increases the frequency of repairing the main iron trench and brings great hidden dangers to the stable and safe production of blast furnaces. Improve

Method used

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  • Small blast furnace main iron runner castable

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use formula 1 to prepare blast furnace main iron trough: mix ingredients according to formula 1 and mix them with a mixer to form castables, then add castables to the mold installed in the main iron trough where molten iron flows through, and naturally maintain for 1 hour to demould to obtain blast furnace main iron ditch.

Embodiment 2

[0020] Use Formula 2 to prepare the main iron trough of the small blast furnace: mix the ingredients according to Formula 1 and stir it with a mixer to form the castable, then add the castable to the mold installed in the main iron trough where the molten iron flows, and let it be naturally cured for 1 hour to demould to obtain the blast furnace main iron ditch.

Embodiment 3

[0022] Use Formula 3 to prepare the main iron trough of the small blast furnace: mix the ingredients according to Formula 1 and stir it with a mixer to form a castable, then add the castable to the mold installed in the main iron trough where the molten iron flows, and let it be naturally cured for 1 hour to demould to obtain the blast furnace main iron ditch. Specific indicators see the table below

[0023]

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PUM

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Abstract

The invention relates to a small blast furnace main iron runner castable, belonging to the field of refractory castables. The small blast furnace main iron runner castable comprises the following components in parts by weight: 48-56 parts of alumina, 1-8 parts of zirconium mullite hollow sphere, 3-10 parts of metallic silicon powder, 10-25 parts of gahnite powder, 10-15 parts of waste smelting furnace casing, 3-10 parts of strontium titanate powder, 1-2 parts of Gangxi sludge, 1-5 parts of silicon nitride, and additionally 0.1-0.2 part of sodium tripolyphosphate, 0.05-0.2 part of styrene maleic anhydride and 3-8 parts of aluminum sol suspension. The waste smelting furnace casing is a graphite production furnace casing which is mainly composed of 56-68% of SiC, 10-20% of C and 3-10% of SiO2. The blast furnace iron runner prepared from the castable has the characteristics of favorable thermal shock resistance, high corrosion peeling resistance, high iron flux and long service life.

Description

Technical field [0001] The present invention involves a small blast furnace main iron ditch pouring material, which belongs to the field of metallurgical refractory materials. Background technique [0002] Most of the existing main iron ditch pouring is al 2 O 3 -SIC-C pouring, but ordinary AL 2 O 3 -SIC-C main iron ditch pouring materials are used on the blast furnace, with a one-time iron volume of about 100,000 tons.With the strengthening of smelting and improving the demand for iron water production, the demand for large iron volume to require a large amount of iron at one time is becoming increasingly urgent.It is an important reason for the short life of the main iron ditch without resistance. [0003] CN102101782A revealed a main iron groove pouring material, which is poured by alum, brown corporal jade, silicon carbide, modified nano -carbon powder, SIO, SIO, SIO, SIO 2 Micro powder, calcium aluminate cement, α-al2O3 microfim, explosion-proof fiber, metal silicon powder, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 占丽青
Owner 占丽青