Slide plate brick for slag stopping of converter, and production method thereof

A converter slag blocking and sliding brick technology, applied in the field of iron and steel smelting, can solve problems such as poor thermal shock performance, comprehensive performance needs to be improved, and low cost performance

Active Publication Date: 2017-11-24
HUNAN XIANGGANG RUITAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The publication number is CN 103864444 A "A new type of sliding brick for automatic slag-retaining sliding nozzle of converter and its preparation method" discloses an aluminum-magnesium spinel carbon reburned slag-retaining sliding brick, which improves the resistance of the slag-retaining sliding brick. Slag corrosive but poor thermal shock performance
[0008] Although the above two patents have made some improvements to some properties of the slag-blocking sliding bricks, they still need to be protected and fired at high temperature, the cost performance is not high, and the overall performance needs to be improved

Method used

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  • Slide plate brick for slag stopping of converter, and production method thereof
  • Slide plate brick for slag stopping of converter, and production method thereof

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preparation example Construction

[0051]The raw material for the preparation of the sliding brick for converter slag blocking provided by the present invention includes 45%-60% of tabular alumina, preferably 48%-57%, more preferably 45%-54%. In the present invention, the tabular alumina includes tabular alumina particles and tabular alumina fine powder. Wherein, the platy corundum particles are selected from 2-1 mm platy corundum, 1-0.5 mm platy corundum and 0.5-0 mm platy corundum, and the platy corundum fine powder is selected from 325 mesh platy corundum fine powder.

[0052] The raw material for the preparation of the sliding brick for converter slag blocking provided by the present invention also includes 10% to 30% zircon mullite, preferably 15% to 25%, more preferably 18% to 22%. Preferably, the zircon-mullite is selected from 2-1 mm zircon-mullite and 1-0 mm zircon-mullite.

[0053] In the present invention, the platy corundum and zirconium-mullite aggregates are the basic guarantees for high-quality ...

Embodiment 1

[0095] 13 parts of 325 mesh tabular corundum fine powder, 10 parts of 2.5 μm bimodal α-alumina micro powder, 2 parts of 200 mesh industrial aluminum flakes, 5 parts of 325 mesh industrial aluminum powder, 2 parts of 325 mesh clay, 2 parts of micron carbon black Put it into the premixing equipment together with 1 part of 325 mesh boron carbide, and premix for 20 minutes to prepare premixed powder. 15 parts of 2~1mm tabular alumina, 11 parts of 1~0.5mm tabular alumina, 13 parts of 0.5~0mm tabular alumina, 10 parts of 2~1mm zircon mullite, 10 parts of 1~0mm zircon mullite, 5 Put 1-0mm silicon carbide into the kneader and dry mix for 3 minutes, add 1.6 parts of MS-1 silicone resin and 2.24 parts of PF5321 phenolic resin and mix for 12 minutes, then add premixed powder and mix for 5 minutes, then add 0.4 parts of MS-1 silicone resin and 0.56 parts of PF5321 phenolic resin were mixed and milled for 3 minutes, and finally 1 part of aluminum fiber was evenly sprinkled in, and the mate...

Embodiment 2

[0097] 12 parts of 325 mesh tabular corundum fine powder, 10 parts of 2.5μm bimodal α-alumina micropowder, 2.5 parts of 200 mesh industrial aluminum flakes, 5.5 parts of 325 mesh industrial aluminum powder, 1.5 parts of 325 mesh clay, 1.5 parts of micron carbon black Add 0.5 parts of 325-mesh boron carbide into the pre-mixing equipment, and pre-mix for 15 minutes to prepare pre-mixed powder. 16 parts of 2-1mm tabular alumina, 10 parts of 1-0.5mm tabular alumina, 14 parts of 0.5-0mm tabular alumina, 9 parts of 2-1mm zircon mullite, 10 parts of 1-0mm zircon mullite, 6 Put 1~0mm silicon carbide into the kneader and dry mix for 2 minutes, add 1.65 parts of MS-1 silicone resin and 1.8 parts of PF5321 phenolic resin and mix for 10 minutes, then add premixed powder and mix for 4 minutes, then add Mix and grind 0.55 parts of MS-1 silicone resin and 0.6 parts of PF5321 phenolic resin for 2 minutes, and finally sprinkle 1.5 parts of aluminum fiber evenly, and discharge after 30 minutes ...

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Abstract

The invention provides a slide plate brick for slag stopping of a converter. The slide plate brick is produced from, by mass, 45-60% of tabular corundum, 10-30% of zirconia mullite, 6-14% of alumina micro-powder, 4-10% of metallic aluminum powder, 2-8% of silicon carbide, 1-3% of clay, 1-3% of carbon black, 0.5-1.5% of boron carbide, 0.5-1.5% of aluminum fibers and 4-6% of a composite resin binder. The slide plate brick for slag stopping of the converter is produced through selecting specific kinds and proportions of the raw materials without high temperature calcination, can be used multiple times, and has good resistance to corrosion, scour, oxidation and thermal shock.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a sliding brick for blocking slag in a converter and a preparation method thereof. Background technique [0002] Iron and steel smelting is a basic industry in modern industry and an important guarantee for industrial development. It mainly includes: feeding, slagging, slagging, molten pool stirring, dephosphorization, refining outside the furnace, molten steel stirring, and finally tapping. [0003] Among them, the steel slag produced in the converter steelmaking is harmful to the next process: it affects the life of the ladle refractory; it causes the molten steel to return to sulfur and phosphorus, which affects the quality of the molten steel; it increases the consumption of ferroalloy after the furnace; it increases the consumption of synthetic slag in the subsequent process. Dosage; prolong the processing time of the refining process. Converter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
CPCC04B35/622C04B35/66C04B2235/3217C04B2235/3463C04B2235/349C04B2235/3821C04B2235/3826C04B2235/402C04B2235/424C04B2235/5216C04B2235/9676
Inventor 朱新军曾立民徐为敏肖亘曾昆唐安山
Owner HUNAN XIANGGANG RUITAI TECH
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