A kind of gunning material for non-carbon ladle and its preparation method and application

A carbon-free ladle and gunning material technology, applied in the field of iron and steel smelting, can solve the problems of weak bonding performance, poor pressure resistance and high temperature bending resistance, and achieve the effects of reasonable ratio, enhanced fire resistance, and reduced labor intensity.

Active Publication Date: 2020-02-21
SHANGHAI LIER REFRACTORY MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But unfortunately, at present, the gunning materials used for carbon-free ladle lining in large domestic steel mills have always had the defects of weak bonding performance, poor pressure resistance and high temperature bending resistance.

Method used

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  • A kind of gunning material for non-carbon ladle and its preparation method and application
  • A kind of gunning material for non-carbon ladle and its preparation method and application
  • A kind of gunning material for non-carbon ladle and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A gunning material for a carbon-free steel ladle, consisting of the following raw materials:

[0043] 5 ~ 3mm plate corundum: 20Kg; 3 ~ 1mm plate corundum: 15Kg; 1 ~ 0mm spinel: 20Kg; 325 mesh spinel: 23Kg; α-Al 2 o 3 Micropowder: 8Kg; Calcium aluminate cement: 10Kg; Explosion-proof fiber: 0.5Kg; Metal aluminum powder: 0.5Kg; Polycarboxylate anti-slump agent: 0.5Kg;

[0044] Wherein, the Al in the tabular corundum 2 o3 The content of ≥99.5%, Al in the spinel 2 o 3 The content of MgO is ≥78%, and the content of MgO is ≥21%.

[0045] The preparation process is as follows: the above-mentioned raw materials are weighed according to the formula, put into a forced stirrer and stirred evenly, and then the carbon-free ladle gunning material is obtained.

[0046] The physical and chemical indicators of the gunning material for the carbon-free ladle were detected, and the specific detection results are shown in Table 1. According to the data shown in Table 1, it can be seen...

Embodiment 2

[0051] A gunning material for a carbon-free steel ladle, consisting of the following raw materials:

[0052] 5 ~ 3mm plate corundum: 16Kg; 3 ~ 1mm plate corundum: 15Kg; 1 ~ 0mm spinel: 20Kg; 325 mesh spinel: 25Kg; α-Al 2 o 3 Micropowder: 5Kg; calcium aluminate cement: 8Kg; explosion-proof fiber: 0.08Kg; metal aluminum powder: 0.05Kg; polycarboxylate slump stabilizer: 0.05Kg;

[0053] Wherein, the Al in the tabular corundum 2 o 3 The content of ≥99.5%, Al in the spinel 2 o 3 The content of MgO is ≥78%, and the content of MgO is ≥21%.

[0054] The preparation process is as follows: the above-mentioned raw materials are weighed according to the formula, put into a forced stirrer and stirred evenly, and then the carbon-free ladle gunning material is obtained.

[0055] The physical and chemical indicators of the gunning material for the carbon-free ladle were detected, and the specific detection results are shown in Table 2. According to the data shown in Table 2, it can be ...

Embodiment 3

[0060] A gunning material for a carbon-free steel ladle, consisting of the following raw materials:

[0061] 5 ~ 3mm tabular alumina: 20Kg; 3 ~ 1mm tabular alumina: 15Kg; 1 ~ 0mm spinel: 25Kg; 325 mesh spinel: 20Kg; α-Al 2 o 3 Micropowder: 12Kg; Calcium aluminate cement: 10Kg; Explosion-proof fiber: 2Kg; Metal aluminum powder: 2Kg; Polycarboxylate anti-slump agent: 1Kg;

[0062] Wherein, the Al in the tabular corundum 2 o 3 The content of ≥99.5%.

[0063] The preparation process is as follows: the above-mentioned raw materials are weighed according to the formula, put into a forced stirrer and stirred evenly, and then the carbon-free ladle gunning material is obtained.

[0064] The physical and chemical indicators of the gunning material for the carbon-free ladle were detected, and the specific detection results are shown in Table 3. According to the data shown in Table 3, it can be seen that the bulk density of the gunning material described in Example 3 is suitable, and...

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Abstract

The invention provides a gunning material for a carbon-free steel ladle as well as a preparation method and an application of the gunning material. The gunning material is mainly prepared from the following raw materials in parts by weight: 32-35 parts of corundum, 40-45 parts of spinel, 5-12 parts of alpha-Al2O3 fine powder, 8.5-12 parts of a binding agent, 0.09-3 parts of an antiknock agent and 0.01-1 part of a slump retaining agent. The gunning material has the advantages of being good in viscosity, resistant to high-temperature compression and high in fracture resistance and avoiding introduction of carbon impurities. The gunning material for the carbon-free steel ladle can be directly used for performing gunning repair at parts with excessive local melting loss and insufficient residual thickness during cold repair, so that the service life of the carbon-free steel ladle is effectively prolonged, and good molten steel corrosion resistance and erosion resistance are shown in the use process. Refractory consumption of steel per ton can be significantly / remarkably reduced, labor intensity of workers is reduced, economic benefits of enterprises are increased, and the gunning material has great economic significance.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a carbon-free steel ladle gunning material and its preparation method and application. Background technique [0002] Ladle, also known as ladle, was originally used in steelmaking plants and foundries to receive molten steel and perform pouring operations in front of open hearth furnaces, electric furnaces or converters, and is only used as a transmission device on the molten steel continuous casting operation line. With the development of out-of-furnace refining and continuous casting technology, the use of ladles for secondary refining has become the mainstream process of major steel mills and is a key link in the production of high-quality steel. At the same time, in order to meet the user's requirements for high-purity, high-cleanliness low-carbon steel, steelmakers must further control the cleanliness of molten steel during the smelting process, especially for low-carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/443B22D41/02C04B35/63
CPCB22D41/02C04B35/443C04B35/6303C04B35/66C04B2235/3217C04B2235/402C04B2235/447C04B2235/5212C04B2235/77C04B2235/96
Inventor 李维锋李洪波汪正峰颜浩邹新国李勇伟马四凯
Owner SHANGHAI LIER REFRACTORY MATERIAL
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