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Optimized long-life low-material-consumption refining ladle

A technology for ladles and consumables, which is applied in the field of optimized high-life and low-consumables smelting ladles, can solve the problems of low thermal conductivity, thermal shock stability, no castables for circulating working layers, and no development of circulating working layers, etc., to improve Insulation performance, excellent resistance to molten steel erosion, and the effect of improving thermal shock stability

Active Publication Date: 2014-12-24
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned technical solution not only requires that the poured circulating working layer must have excellent high strength and high temperature resistance, but also must have excellent resistance to molten steel erosion and steel slag erosion, as well as low thermal conductivity and good Thermal shock stability, etc., but currently this technical field has not developed a casting material specially used for the above-mentioned circulating working layer, and there is no related report similar to the above-mentioned circulating working layer castable

Method used

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  • Optimized long-life low-material-consumption refining ladle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The castable of the circulating working layer 3 is based on 55 parts of sintered microporous corundum aggregate, 10 parts of aluminum-magnesium spinel aggregate, 20 parts of fine powder, 5 parts of fine powder, 5 parts by weight ratio of raw materials. It is composed of 3 parts of binding agent, 0.3 parts of anti-explosive agent, 1 part of water reducing agent and 0.05 part of foaming agent;

[0050] Sintered microporous corundum aggregate is divided into five levels according to particle size: 12mm<particle size≤2mm, 7mm<particle size≤12mm, 3mm<particle size≤7mm, 1mm<particle size≤3mm and 0mm<particle size≤1mm With; the weight percentages are: 13%, 32%, 18%, 22% and 15%;

[0051] Wherein, the fine powder is a mixture of fused white corundum and aluminum-magnesium spinel, and the weight ratio of fused white corundum to aluminum-magnesium spinel is 6:1;

[0052] Micropowder is SiO 2 Micropowder and active α-Al 2 O 3 Micro powder mixture, SiO 2 Micropowder and active α-Al 2 O 3...

Embodiment 2

[0056] The castable of the circulating working layer 3 is composed of 60 parts of sintered microporous corundum aggregate, 5 parts of aluminum-magnesium spinel aggregate, 20 parts of fine powder, 8 parts of fine powder, 7 parts by weight ratio of raw materials. It is composed of 2 parts of binding agent, 0.1 part of anti-explosive agent, 0.1 part of water reducing agent and 0.1 part of foaming agent;

[0057] Sintered microporous corundum aggregate is divided into five levels according to particle size: 12mm

[0058] The fine powder is a mixture of sintered tabular corundum and fused magnesia, and the weight ratio of sintered tabular corundum to fused magnesia is 3:1;

[0059] Micropowder is SiO 2 Mixture of micropowder and sintered corundum micropowder (brand number CL370), SiO 2 The weight ratio of micro po...

Embodiment 3

[0064] The castable of the circulating working layer 3 is calculated according to the weight ratio of the raw materials by 65 parts of sintered microporous corundum aggregate, 8 parts of aluminum-magnesium spinel aggregate, 25 parts of fine powder, 6 parts of micropowder, 4 It is composed of 2 parts of binding agent, 0.2 parts of anti-explosive agent, 2 parts of water reducing agent and 0.1 part of foaming agent;

[0065] Sintered microporous corundum aggregate is divided into five levels according to particle size: 12mm

[0066] The fine powder is a mixture of sintered tabular corundum and sintered magnesia, and the weight ratio of sintered tabular corundum to fused magnesia is 1:1;

[0067] Micropowder is SiO 2 Mixture of micropowder and sintered corundum micropowder; where SiO 2 The weight ratio of micropo...

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Abstract

The invention discloses an optimized long-life low-material-consumption refining ladle. The ladle comprises a ladle shell, wherein a permanent layer is built on the inner wall of the ladle shell; a cyclic work layer is poured on the inner wall of the permanent layer; a consumptive work layer is built on the inner wall of the cyclic work layer; the castable of the cyclic work layer comprises the following components in parts by weight: 55-70 parts of sintered microporous corundum aggregate, 5-10 parts of magnesium aluminum spinel aggregate, 10-25 parts of fine powder, 2-8 parts of micro powder, 3-8 parts of bonding agent, 0.1-0.5 parts of antidetonant, 0.05-2 parts of water reducing agent and 0.01-0.1 parts of foaming agent. The cast cyclic work layer improves the safety coefficient for use of the refining ladle, has good integrity and effectively blocks the penetration of molten steel from brick joints of the permanent layer, and the cast cyclic work layer has low thermal conductivity and good thermal insulation property and can greatly reduce the consumption of the refractory material per ton of steel.

Description

Technical field [0001] The present invention relates to a further improvement of the smelting ladle described in the Chinese invention patent application publication number CN103464735A, and specifically refers to an optimized smelting ladle with high life and low consumables. Background technique [0002] The refractory structure used for the traditional smelting ladle lining is mainly divided into two layers, namely the permanent layer and the working layer. The permanent layer is usually not in direct contact with the molten steel, and the thickness is about 80-150mm. Its main function is to heat insulation and prevent the temperature of the ladle from dropping. Quickly affect the quality of pouring steel. Most permanent layers are made of high-alumina bauxite bricks or casted with bauxite castables. These refractory materials have relatively low refractoriness, low strength in high-temperature use, and poor resistance to molten steel erosion and slag erosion. The working lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/02C04B35/66
Inventor 洪学勤田先明王志强雷中兴周辉易碧辉阮祥波曹志明
Owner WUGANG REFRACTORY CO LTD
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