Blast furnace main iron channel castable

A main iron channel and castable technology, which is applied in the field of refractory castables, can solve the problems of hidden dangers in blast furnace iron production safety, low durability, high melting loss rate, etc., and achieve strong high temperature volume stability and high thermal shock stability , the effect of low melting loss rate

Inactive Publication Date: 2012-11-14
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this kind of castable with brown corundum as the main particles has a high melting loss rate and low durability, which greatly increases the frequency of iron trench repair operations and brings great hidden dangers to the safe production of blast furnace iron. Used on the main iron trough of large and medium blast furnaces

Method used

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  • Blast furnace main iron channel castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Use formula 1 to prepare blast furnace main iron trough: vibrate in vibrating device for 3 minutes after batching according to formula 1, install mold in main iron trough where molten iron flows through, add vibrated ingredients to mold, then add liquid sodium silicate, liquid The weight of sodium silicate is 3% of the total amount of castables. After stirring for 10 minutes, it is naturally cured for 1 hour and then demoulded to obtain the main iron channel of the blast furnace.

[0047]

Embodiment 2

[0049]Use formula 2 to prepare blast furnace main iron trough: vibrate in the vibrating device for 5 minutes after ingredients according to formula 2, install a mold in the main iron trough where molten iron flows through, add vibrated ingredients to the mold, then add liquid sodium silicate, liquid The weight of sodium silicate is 8% of the total amount of castables. After stirring for 15 minutes, it is naturally cured for 2 hours and then demoulded to obtain the main iron channel of the blast furnace.

[0050]

Embodiment 3

[0052] Use formula 3 to prepare blast furnace main iron trough: vibrate in the vibrating device for 4 minutes after ingredients according to formula 3, install a mold in the main iron trough where molten iron flows through, add vibrating ingredients to the mold, then add liquid sodium silicate, liquid The weight of sodium silicate is 5% of the total amount of castables. After stirring for 12 minutes, and natural curing for 1.5 hours, the main iron channel of the blast furnace is demoulded.

[0053]

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Abstract

The invention relates to a blast furnace main iron channel castable and belongs to the field of refractory castables. The blast furnace main iron channel castable comprises the following components in part by weight: 50-65 parts of tabular corundum, 10-15 parts of andalusite, 1-8 parts of alumina hollow ball, 3-10 parts of electric smelting zirconia, 10-25 parts of alumina micro powder, 10-15 parts of silicon carbide, 8-12 parts of ferro silicon nitride, 3-10 parts of alumina micro powder, 4-8 parts of alumina and silica sol composite suspension, 1-2 parts of nano ceramic powder, 0.1-0.3 part of mixture of sodium tripolyphosphate and sodium hexametaphosphate and 0.3-0.4 part of explosion-proof fiber. A blast furnace main iron channel prepared by the castable has the advantages of long service life, low melting loss rate and strong oxidation resistance.

Description

technical field [0001] The invention relates to a castable for a main iron trough of a blast furnace, which belongs to the field of refractory castables. Background technique [0002] The existing main iron trough castable is ordinary Al 2 o 3 -SiC-C castables, but ordinary Al 2 o 3 -SiC-C main iron ditch castable at 2500m 3 It is used on a blast furnace, and the amount of iron passing through at one time is 170,000 tons. With the strengthening of smelting, the need to increase production has become increasingly prominent, and the requirements for the amount of iron passing through the main iron trough at one time have become more and more stringent, but the amount of iron passing through is not ideal. [0003] CN102101782 (2011-6-22) discloses a castable for main iron trough, the castable is composed of alumina, brown corundum, SiC, modified nano-carbon powder, SiO 2 Micropowder, calcium aluminate cement, α-A1 2 o 3 Micropowder, explosion-proof fiber, metal silicon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 朱国平常正钦山国强朱其良彭晶晶
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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