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Preparation method of blast furnace tapping channel

A blast furnace tapping and alumina fine powder technology is applied in the field of refractory castables, which can solve the problems of safe production of blast furnace tapping, unsuitable use, large melting loss rate, etc. The effect of low melting loss rate

Active Publication Date: 2014-05-21
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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  • Preparation method of blast furnace tapping channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Use formula 1 to prepare blast furnace tapping trough: vibrate in the vibrating device for 3 minutes after mixing ingredients according to formula 1, install a mold in the tapping trough where molten iron flows through, add 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.

Embodiment 2

[0050] Use formula 2 to prepare blast furnace tapping trough: vibrate in the vibrating device for 5 minutes after formulating the ingredients 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.

Embodiment 3

[0052] Use formula 3 to prepare blast furnace tapping trough: vibrate in the vibrating device for 4 minutes after batching according to formula 3, 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 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.

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Abstract

The invention relates to a preparation method of a blast furnace tapping channel and belongs to the field of refractory castables. The preparation method of the blast furnace tapping channel comprises the following steps of: weighing the following raw materials in parts 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; then vibrating for 3-5 minutes in a vibration device; and installing a mould in a tapping channel through which molten iron flows, adding vibrated ingredients into the mould, adding liquid sodium silicate with a weight of 3-8 percent of total quantity of a castable, agitating for 10-15 minutes, naturally curing for 1-2 hours and demoulding to obtain the blast furnace tapping channel. The blast furnace tapping channel with long service life and the low melting loss rate can be prepared by the preparation method.

Description

technical field [0001] The invention relates to a method for preparing 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 ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 朱国平常正钦山国强朱其良彭晶晶
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD