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Desulphurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory

A technology for refractory castables and molten iron tanks, which is applied in the field of steel fiber reinforced refractory castables for desulfurized molten iron tanks, refractory castables, and can solve the problems of expensive castables, low overall performance and mechanical damage resistance

Inactive Publication Date: 2009-01-28
WUHAN IRON & STEEL (GROUP) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problems of low comprehensive overall performance and low mechanical damage resistance of the working lining along the desulfurized hot metal tank, and expensive castables

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation of 2056 kg of desulfurized iron ladle along the steel fiber reinforced refractory castable: its raw material composition and weight percentage are: regenerated waste desulfurization spray gun refractory material working lining recycled material 55%, high alumina clinker 18%, bauxite cement 10% , microsilica powder 6.55%, regenerated aluminum silicate fiber 3%, regenerated heat-resistant steel fiber 4%, Portland cement 3%, sodium tripolyphosphate 0.3%, calcium lignosulfonate 0.15%. Among them, the waste desulfurization spray gun refractory working lining recycled materials are composed of six particle gradations with particle sizes of 15-10mm, 10-5mm, 5-3mm, 3-1mm, 1-0.1 and 2 o 3 The weight percentage content is ≥ 60%, which is composed of two particle gradations with a particle size of 1-0.1mm and <0.088mm, and the weight percentage is 2% and 10% respectively; the recycled heat-resistant steel fiber is the discarded desulfurization spray gun working lining ...

Embodiment 2

[0016] Preparation of 2056 kg of desulfurized iron ladle along the steel fiber reinforced refractory castable: its raw material composition and weight percentage are: 75% of regenerated waste desulfurization spray gun refractory material, 75% of regenerated material, 10% of high alumina clinker, 5% of alumina cement , microsilica powder 3.85%, regenerated aluminum silicate fiber 3%, regenerated heat-resistant steel fiber 2%, Portland cement 1%, sodium tripolyphosphate 0.1%, calcium lignosulfonate 0.3%. Among them, the waste desulfurization spray gun refractory working lining recycled materials are composed of six particle gradations with particle sizes of 15-10mm, 10-5mm, 5-3mm, 3-1mm, 1-0.1 and 2 o 3 The weight percentage content is ≥60%, which is composed of two particle gradations with particle sizes of 1-0.1mm and <0.088mm respectively, and the weight percentages are 5% and 13% respectively; the regenerated heat-resistant steel fiber is the discarded desulfurization spray g...

Embodiment 3

[0018] Preparation of 2056 kg of desulfurized iron ladle along the steel fiber reinforced refractory castable: its raw material composition and weight percentage are: regenerated waste desulfurization spray gun refractory material working lining recycled material 70%, high alumina clinker 14%, bauxite cement 6% , microsilica powder 3%, recycled aluminum silicate fiber 2%, recycled heat-resistant steel fiber 2.2%, Portland cement 2.5%, sodium tripolyphosphate 0.2%, calcium lignosulfonate 0.1%. Among them, the waste desulfurization spray gun refractory working lining recycled materials are composed of six particle gradations with particle sizes of 15-10mm, 10-5mm, 5-3mm, 3-1mm, 1-0.1 and 2 o 3 The weight percentage content is ≥60%, which is composed of two particle gradations with particle sizes of 1-0.1mm and <0.088mm, and the weight percentages are 7% and 8% respectively; among them, the regenerated heat-resistant steel fiber is the working lining of the waste desulfurization s...

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Abstract

The invention discloses a steel fiber reinforced refractory castable for the edge of a desulfurization hot metal tank, which is made from the following raw materials with the weight percentages: 55-75% of a reclaimed material of a working lining of a desulfurization spray gun refractory material, 10-20% of high-alumina clinker, 5-10% of alumina cement, 3-7% of silica micropowder, 1-3% of reclaimed aluminum silicate fiber, 2-4% of reclaimed refractory steel fiber, 1-3% of Portland cement, 0.1-0.3% of sodium tripolyphosphate and 0.05-0.15% of calcium lignosulphonate. In the invention, the waste refractory working lining material decomposed by the desulfurization spray gun is taken as the resource of the main raw material of the castable, and finally the steel fiber reinforced refractory castable for the edge of the desulfurization hot metal tank with low cost, convenient preparation and simple use and with the reclaimed material of the waste refractory material as the main raw material is obtained, which greatly improves the integrated overall performance and anti-mechanical damage performance of the working lining of the tank edge.

Description

technical field [0001] The invention relates to a steel fiber-reinforced refractory castable for desulfurized molten iron tanks, in particular to a refractory castable that is integrally cast along the working lining of molten iron tanks for desulfurization pretreatment of molten iron, and belongs to the field of amorphous refractory materials . Background technique [0002] With the continuous desulfurization of molten iron, slagging of iron on the nozzle, edge and slag line of the desulfurized molten iron tank is gradually serious, resulting in an increase in the weight of the empty tank and a shift of the center of gravity, which seriously affects the production organization and production of iron and steelmaking. Safe; at the same time, due to the hardness of the slag chill and the slag condensation precipitate and the rivet bonding effect of the chill iron penetration, it is very difficult to remove the sticky slag. In actual production, the flame cutting method is gen...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 欧阳德刚王清方蒋扬虎李具中罗安智陶晓林刘守堂胡清明李明晖张爱平
Owner WUHAN IRON & STEEL (GROUP) CORP
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