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Flow controlling water gap for production of mineral wool from blast furnace slag and production process thereof

A technology of blast furnace slag and mineral wool, applied in the field of refractory materials, can solve problems affecting furnace operation efficiency, operation safety, and short life

Active Publication Date: 2015-03-04
RUITAI MATERIALS TECHNOLOGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stopper rod and the upper nozzle are severely eroded by the slag liquid, thermal shock and oxidation, and the general materials cannot withstand the harsh working conditions. The life of the graphite stopper and nozzle currently used is very short (generally less than 4 days) , which seriously affects the operating efficiency and safety of the furnace

Method used

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  • Flow controlling water gap for production of mineral wool from blast furnace slag and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material formula that adopts is as follows:

[0030] (1) Fused zirconia corundum (AZS41#) with a particle size of 3-1mm, 4%;

[0031] (2) Fused zirconia corundum (AZS41#) with particle size ≤0.088mm, 20%;

[0032] (3) Green silicon carbide with a particle size of 1-0.5mm, 33%;

[0033] (4) Green silicon carbide with a particle size of 0.5-0.21mm, 7%;

[0034] (5) Green silicon carbide with a particle size of 0.21-0.088mm, 25%;

[0035] (6) Fused silica with a particle size of 0.5-0.21mm, 5%;

[0036] (7) Fused silica with a particle size of 0.21 to 0.088mm, 1%;

[0037] (8) Expanded graphite with particle size ≤0.020mm, 1%;

[0038] (9) Chrome green with particle size ≤0.020mm, 2%;

[0039] (10) Silicon powder with particle size ≤0.010mm, 2%;

[0040] The specific production process is as follows:

[0041] (1) Premix the powder. Green silicon carbide and fused silica with a particle size of 0.21-0.088mm, fused zirconia corundum with a particle size of ≤...

Embodiment 2

[0055] The raw material formula that adopts is as follows:

[0056](1) Fused zirconia corundum (AZS41#) with a particle size of 3-1mm, 6%;

[0057] (2) Fused zirconia corundum (AZS41#) with particle size ≤0.088mm, 23%;

[0058] (3) Green silicon carbide with a particle size of 1-0.5mm, 29%;

[0059] (4) Green silicon carbide with a particle size of 0.5-0.21mm, 10%;

[0060] (5) Green silicon carbide with a particle size of 0.21-0.088mm, 21%;

[0061] (6) Fused silica with a particle size of 0.5-0.21mm, 4%;

[0062] (7) Fused silica with a particle size of 0.21 to 0.088mm, 2%;

[0063] (8) Expanded graphite with particle size ≤0.020mm, 1%;

[0064] (9) Chrome green with particle size ≤0.020mm, 3%;

[0065] (10) Silicon powder with particle size ≤0.010mm, 1%;

[0066] The specific production process is as follows:

[0067] (1) Premix the powder. Green silicon carbide and fused silica with a particle size of 0.21-0.088mm, fused zirconia corundum with a particle size of ≤...

Embodiment 3

[0079] The raw material formula that adopts is as follows:

[0080] (1) Fused zirconia corundum (AZS41#) with a particle size of 3-1mm, 5%;

[0081] (2) Fused zirconia corundum (AZS41#) with particle size ≤0.088mm, 25%;

[0082] (3) Green silicon carbide with a particle size of 1-0.5mm, 26%;

[0083] (4) Green silicon carbide with a particle size of 0.5-0.21mm, 13%;

[0084] (5) Green silicon carbide with a particle size of 0.21-0.088mm, 20%;

[0085] (6) Fused silica with a particle size of 0.5-0.21mm, 3%;

[0086] (7) Fused silica with a particle size of 0.21 to 0.088mm, 2%;

[0087] (8) Expanded graphite with particle size ≤0.020mm, 2%;

[0088] (9) Chrome green with particle size ≤0.020mm, 1%;

[0089] (10) Silicon powder with particle size ≤0.010mm, 1%;

[0090] The specific production process is as follows:

[0091] (1) Premix the powder. Green silicon carbide and fused silica with a particle size of 0.21-0.088mm, fused zirconia corundum with a particle size of ...

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Abstract

The invention relates to a flow controlling water gap for production of mineral wool from blast furnace slag and a production process thereof, and belongs to the field of refractory materials. The flow controlling water gap is prepared from the following components: 3-6% of electrically-fused zirconia corundum with the granularity of 3-1mm, 20-25% of electrically-fused zirconia corundum with the granularity smaller than or equal to 0.088mm, 25-35% of green silicon carbide with the granularity of 1-0.5mm, 5-15% of green silicon carbide with the granularity of 0.5-0.21mm, 20-25% of green silicon carbide with the granularity of 0.21-0.088mm, 3-5% of fused quartz with the granularity of 0.5-0.21mm, 1-2% of fused quartz with the granularity of 0.21-0.088mm, 1-2% of expanded graphite with the granularity of smaller than or equal to 0.020mm, 2-3% of chrome green with the granularity of smaller than or equal to 0.020mm, 1-2% of silicon powder with the granularity of smaller than or equal to 0.010mm and 2-4% of plaenolic resin binder. The production process comprises the following steps: mixing, ageing a mixture, performing isostatic pressing forming, drying, sintering, performing flaw detection, performing glaze spraying and the like. The flow controlling water gap has excellent erosion resistance, heat shock resistance and oxidation resistance, and has the service life of more than 20 days, which is far longer than the service life of graphite water gap (about 4 days).

Description

technical field [0001] The invention relates to a nozzle for controlling flow of mineral wool produced from blast furnace slag and a production process thereof, belonging to the field of refractory materials. Background technique [0002] A large amount of high-temperature molten slag (or blast furnace slag, accounting for about 1 / 3 of iron production) produced in the iron and steel production process has a discharge temperature as high as 1400-1500 ° C. Since my country's iron and steel enterprises usually use water quenching process to process blast furnace slag, hot slag The heat carried is not utilized, but precious water resources are wasted, and the sewage and harmful gases generated during the water quenching process pollute the environment. Faced with the increasing discharge of blast furnace slag, which occupies a large amount of land, the current molten slag treatment process has problems such as energy, resource waste, and environmental pollution. The use of hot b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B41/86
Inventor 陈松林曾鲁举蒋正跃胡建坤刘士范胡列江杨胜利李文明
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
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