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Blast furnace tapping channel castable

A technology for tapping troughs and castables, which is applied in the field of refractory castables, can solve problems such as hidden dangers in blast furnace tapping safety production, low durability, and high melting loss rate, and achieve improved thermal shock 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

[0005] 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. It is used on the tapping trough of large and medium blast furnaces

Method used

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  • Blast furnace tapping channel castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Use formula 1 to prepare blast furnace tapping trough: vibrate in the vibrating device for 3 minutes after formulating the ingredients according to formula 1, install a mold in the tapping trough where molten iron flows through, add the vibrating ingredients to the 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 a blast furnace tapping trough.

[0052]

Embodiment 2

[0054] Use formula 2 to prepare blast furnace tapping trough: vibrate in the vibrating device for 5 minutes after batching according to formula 2, install the mold in the tapping trough where molten iron flows through, add the vibrating 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 a blast furnace tapping trough.

[0055]

Embodiment 3

[0057] Use formula 3 to prepare the blast furnace tapping trough: vibrate in the vibrating device for 4 minutes after ingredients according to formula 3, install the mold in the tapping trough where the molten iron flows through, add the 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, it is naturally cured for 1.5 hours and then demoulded to obtain a blast furnace tapping trough.

[0058]

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Abstract

The invention relates to a blast furnace tapping channel castable and belongs to the field of refractory castable. The blast furnace tapping channel castable comprises the following components in part by weight: 40-50 parts of alumina, 15-30 parts of sintered 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, 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 tapping channel with long service life and low melting loss rate can be prepared by the blast furnace tapping channel castable.

Description

technical field [0001] The invention relates to a castable for a blast furnace tapping trough, which belongs to the field of refractory castables. Background technique [0002] The blast furnace tapping trough is the channel through which high-temperature molten iron and slag flow. The existing castable castables are ordinary Al 2 o 3 -SiC-C castables, but ordinary Al 2 o 3 -SiC-C castable iron trough 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 intensification of smelting, the need to increase production has become increasingly prominent, and the requirements for the amount of iron passing through the tap trough at one time have become more and more stringent, but the amount of iron passing through is not ideal. [0003] CN100519483 (2009-7-29) discloses a tap channel material and a preparation method thereof. The tap channel material is made of brown corundum, white corundum, silicon carbide, p...

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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