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Pouring material for dip pipe of RH refining furnace

A castable and refining furnace technology, which is applied in the field of castables for dipping pipes of RH refining furnaces, can solve the problem of poor corrosion resistance, slag penetration resistance and thermal shock resistance, poor thermal shock resistance of castables, and prone to crack structures, etc. To solve the problem of serious slag hanging on refractory materials, to solve the problem of poor thermal shock resistance and good oxidation resistance

Inactive Publication Date: 2013-11-06
武钢集团有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, because the castable is easy to stick to slag, the thick slag attached to the outer surface of the dipping tube will seriously affect the normal production. Poor seismic performance, prone to cracks and structural spalling
At present, there are two kinds of castables for RH furnace dipping tubes, one is aluminum magnesium (Al 2 o 3 -MgO) quality, one is aluminum spinel (Al 2 o 3 -MgO□Al 2 o 3 ) quality, since they are mainly composed of MgO and Al 2 o 3 Composition, due to the inherent reasons of the oxide itself, its corrosion resistance, slag penetration resistance and thermal shock resistance are poor, and it is also easy to stick to slag

Method used

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  • Pouring material for dip pipe of RH refining furnace
  • Pouring material for dip pipe of RH refining furnace

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Experimental program
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Embodiment Construction

[0020] Table 1 raw material composition and proportioning (percentage by weight):

[0021]

[0022] Preparation method embodiment 1:

[0023] Preparation of SiC granulated particles: Mix SiC particles with a particle size of 0.05-0.005 mm and antioxidant (α-alumina) micropowder with a particle size of 1 / 5 of the SiC particle size at a weight ratio of 1:0.4, and then add the total amount of the mixed material Measure 5% adhesive, mix again, keep the mixture at 220°C for 20 hours, and then crush it into SiC granules with a particle size of 0.01-0.1mm.

[0024] Mix the aggregate and matrix material, and then add FDN water reducer and explosion-proof organic fiber (polypropylene fiber: polyethylene fiber 1:1) and mix to make castable (1).

[0025] Preparation method embodiment 2:

[0026] Preparation of SiC granulated particles: 0.05-0.005mm SiC particles and antioxidant (zirconia) powder with a particle size of 1 / 10 of the SiC particle size are mixed in a weight ratio of 1:0...

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Abstract

The invention discloses a pouring material for a dip pipe of an RH refining furnace, which solves the problems of poor resistance to slag corrosion, poor thermal shock resistance and severity in slag adhering of refractory of the traditional pouring material. According to the technical scheme, the pouring material comprises additives and a mixture formed by an aggregate material and a matrix material, wherein the matrix material comprises 7.5-23.5% of SiC by weight. The pouring material has the advantages of simple formulation, good corrosion resistance, good resistance to slag permeability and good thermal shock resistance, the problem of severity in slag adhering of the refractory is solved, and therefore, the pouring material has broad prospects for market applications.

Description

technical field [0001] The invention relates to a casting material, in particular to a casting material for dipping pipes of an RH refining furnace. Background technique [0002] RH refining furnace is one of the indispensable important equipment for producing high-quality steel in the process of refining outside the furnace. So far, the dip tube is the key link that restricts the life of the RH furnace. The reason is that the dip tube has extremely harsh working conditions. In addition to being in direct contact with molten steel and slag, it is also subjected to the double test of extreme cold and extreme heat during intermittent operation. . On the one hand, because the castable is easy to stick to slag, the thick slag attached to the outer surface of the dipping tube will seriously affect the normal production. Poor seismic performance, prone to cracks and structural spalling. At present, there are two kinds of castables for RH furnace dipping tubes, one is aluminum m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 陈希来徐国涛邹龙刘黎陈小艳
Owner 武钢集团有限公司
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