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Casting molded ladle prefabricated heat insulating brick

A pouring forming and ladle technology, applied in the field of ladle heat insulation, to achieve the effects of improving collective strength, improving heat insulation performance and bonding performance, and improving service performance

Active Publication Date: 2019-03-08
WUHAN RUXING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve the purpose of reducing the temperature of the ladle shell, the use of materials such as over-thick nano-insulation boards and light-weight permanent layers will have greater safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A prefabricated heat insulating brick for pouring and forming ladles, the raw materials of which are formulated as follows in parts by weight:

[0023] 15 parts of the first andalusite, 20 parts of the second andalusite, 5 parts of the third andalusite, 5 parts of high-purity light material mullite, 5 parts of tabular corundum fine powder, 1 part of activated alumina, 2 parts of calcined alumina 3 parts, 3 parts of nano-silica airgel particle powder, 6 parts of aluminum silicate fiber chopped strands, 18 parts of binder, 0.08 part of dispersant, and 0.05 part of coagulation accelerator.

[0024] The binder is a mixture of hydrated alumina and 30% silica sol, and the weight ratio of the hydrated alumina and 30% silica sol is 1:3.

[0025] The coagulant is fused magnesia with a content of 97%.

[0026] The invention also discloses a preparation process of prefabricated heat insulating bricks for pouring and forming ladles, which includes the following steps:

[0027] S1...

Embodiment 2

[0033] A prefabricated heat insulating brick for pouring and forming ladles, the raw materials of which are formulated as follows in parts by weight:

[0034] 18 parts of the first andalusite, 25 parts of the second andalusite, 8 parts of the third andalusite, 6 parts of high-purity light material mullite, 8 parts of tabular corundum fine powder, 2 parts of activated alumina, 3 parts of calcined alumina 4 parts, 4 parts of nano-silica airgel particle powder, 7 parts of aluminum silicate fiber chopped strands, 25 parts of binder, 0.1 part of dispersant, and 0.2 part of coagulation accelerator.

[0035] The binder is a mixture of hydrated alumina and 30% silica sol, and the weight ratio of the hydrated alumina and 30% silica sol is 1:3.

[0036] The coagulant is fused magnesia with a content of 97%.

[0037] The invention also discloses a preparation process of prefabricated heat insulating bricks for pouring and forming ladles, which includes the following steps:

[0038] S1....

Embodiment 3

[0044] A prefabricated heat insulating brick for pouring and forming ladles, the raw materials of which are formulated as follows in parts by weight:

[0045] 25 parts of the first andalusite, 35 parts of the second andalusite, 12 parts of the third andalusite, 8 parts of high-purity light material mullite, 16 parts of platy corundum fine powder, 4 parts of activated alumina, 7 parts of calcined alumina 8 parts, 8 parts of nano-silica airgel particle powder, 15 parts of aluminum silicate fiber chopped strands, 40 parts of binder, 0.18 parts of dispersant, and 0.3 part of coagulation accelerator.

[0046] The binder is a mixture of hydrated alumina and 30% silica sol, and the weight ratio of the hydrated alumina and 30% silica sol is 1:3.

[0047] The coagulant is fused magnesia with a content of 97%.

[0048] The invention also discloses a preparation process of prefabricated heat insulating bricks for pouring and forming ladles, which includes the following steps:

[0049] ...

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Abstract

The invention relates to the technical field of ladle heat insulation, and particularly relates to a casting molded ladle prefabricated heat insulating brick. The casting molded ladle prefabricated heat insulating brick adopts a raw material formula as follows in part by weight: 15 to 30 parts of first andalusite, 20 to 40 parts of second andalusite, 5 to 15 parts of third andalusite, 5 to 10 parts of high-purity lightweight material mullite, 5 to 20 parts of tabular corundum fine powder, 1 to 6 parts of activated aluminium oxide, 2 to 10 parts of calcined alumina, 3 to 10 parts of nano silicon dioxide aerogel particle powder, 6 to 20 parts of chopped alumina silicate fiber, 18 to 45 parts of binding agent, 0.08 to 0.2 part of dispersing agent and 0.05 to 0.5 part of coagulant. According to the invention, the formula of the ladle heat insulating brick is improved; the using region of the casting molded ladle prefabricated heat insulating brick is between a nano heat insulating plate and a safety permanent layer castable; after the nano heat insulating plate with a thickness of 5 to 7mm is adhered to the inner wall of a ladle wall steel shell, the prefabricated heat insulating brickdisclosed by the invention is adhered with fire clay, and then a die is fed to cast a safety permanent layer. Such mode improves a problem of excessive thickness of the heat insulating plate, also improves a problem of poor heat insulating effect caused by an excessively thin insulating plate, improves safety of use, the heat insulating effect and the service life of the ladle heat insulating layer.

Description

technical field [0001] The invention relates to the technical field of ladle heat insulation, in particular to a prefabricated heat insulation brick for pouring and forming a ladle. Background technique [0002] Ladle is an important steel-holding and steel-making container in iron and steel smelting. With the deepening of energy-saving and environmental protection theory, its thermal insulation performance has become an important indicator. Practice has proved that if the heat insulation performance of the ladle is well done, the temperature drop of molten steel in the process is small, and the tapping temperature of the converter can be greatly reduced. Every time the converter tapping temperature is lowered by 1 degree, the cost can be saved by investing 1 yuan / ton of steel. At present, the choice of ladle heat insulation layer is mainly to adopt nano heat insulation board and light permanent layer. In order to achieve the purpose of reducing the temperature of the ladl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3206C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/5228
Inventor 刘星郭城成徐圣
Owner WUHAN RUXING TECH CO LTD