CN1891670A

CN1891670A - Spinel low-cement functional refractory material pouring material

Info

Publication number: CN1891670A
Application number: CN 200510040960
Authority: CN
Inventors: 张雪松; 刘步周; 俞晓东
Original assignee: JIANGSU SUJIA GROUP NEW MATERIAL CO Ltd
Current assignee: JIANGSU SUJIA GROUP NEW MATERIAL CO Ltd
Priority date: 2005-07-07
Filing date: 2005-07-07
Publication date: 2007-01-10
Anticipated expiration: 2025-07-07
Also published as: CN100363304C

Abstract

A spinel refractory pouring material containing a poor cement quality function is one kind of refractory. According to the invention, the material contains spinel 40-65%, white corundum 15-40%, activated alumina 3-15%, crystal materials of magnesium and zirconium 0.5-8%, cement 2-5%, adjunct 0.01~4.7%,water 3-7%. There is no Cr in such kind of pouring material, so it can not cause any environmental pollution problem. The material also has a favorable anti-heating and shocking performance due to the use of the eutectic material of magnesium and zirconium.

Description

A kind of spinel low-cement functional refractory material pouring material

Technical field

The invention belongs to a kind of refractory materials.

Background technology

Refractory material casting material is mainly used in the manufacturing of steel-making refractory component, for example positions such as ladle nozzle brick cup, gas permeable brick, porous plug, steel-smelting electric furnace bottom electrode cover brick.This type of mould material of using contains Cr mostly at present ₂O ₃, because Cr ₂O ₃In Cr ³⁺In temperature-rise period, easily become Cr ⁶⁺, and contain Cr ⁶⁺Compound carcinogenesis is arranged, will the infringement operator healthy, contaminate environment.And do not contain Cr ₂O ₃Mould material anti-scour property and high temperature resistance thermal shock resistance relatively poor, work-ing life is short, can not satisfy the performance requriements of technology to material.

Summary of the invention

The objective of the invention is to seek a kind of spinel low-cement functional refractory material pouring material, this mould material does not contain the Cr element, has avoided the pollution problem of Cr to environment.Because the use of magnesium zirconium eutectic material makes this mould material have good thermal shock resistance again.Because with the magnesium-aluminium spinel is one of major ingredient, makes this mould material have good anti-scour property.

According to design provided by the present invention, this material contains magnesium-aluminium spinel 40-65%, white fused alumina 15-40%, activated alumina 3-15%, magnesium zirconium eutectic material 0.5-8%, cement 2-5%, admixture 0.01～4.7%, water 3-7%.

In magnesium zirconium eutectic material, contain zirconium dioxide 5-35%.

Described admixture comprises one or more in the following material: water reducer 0.1-1.5%; Explosion-proof fiber 0.01-0.2%; Heat-resistant steel fiber 0.2-2.0%.

Use the effect of magnesium zirconium eutectic material to be: 1, to use magnesium zirconium eutectic material to substitute magnesia powder, can prevent the hydration reaction of magnesia powder, avoid goods cracking when heating up.Because ZrO in the magnesium zirconium eutectic material ₂Be distributed in around the MgO crystal MgO and ZrO mostly ₂Between mutual dissolving, can effectively suppress the activity of MgO.Make MgO and H ₂The trend that O reacts is suppressed.2, ZrO ₂Introducing, the anti-thermal shock stability of goods is improved.Because ZrO ₂Crystal phase transition in various degree can take place under condition of different temperatures, between oblique system-tetragonal system-isometric system crystal phase transition takes place, at the inner tiny crack that produces of goods, when temperature variation, these tiny cracks can absorb expansion, thereby the thermal shock resistance of goods is improved.3, ZrO ₂Can reduce molten steel, slag is wetting to goods, improves the slag penetration resistance energy of goods.

Use magnesium-aluminium spinel can improve the anti-scour property of goods, especially make steel the erosion of basic slag.Also can prevent at Al ₂O ₃The undesirable extention of introducing more MgO in the matter mould material and causing.

Embodiment

Implement one:

The batching component of its pocket block is as follows: contain magnesium-aluminium spinel 42%, white fused alumina 33%, activated alumina 15%, magnesium zirconium eutectic material 1%, cement 3%, heat-resistant steel fiber 1.8%, water 4%, boric acid 0.2%.With this mould material cast ladle nozzle brick cup, reach work-ing life 55 times.

Implement two:

Use this mould material to produce steel-smelting electric furnace bottom electrode cover brick.To produce the product Chemical Composition as follows: contain magnesium-aluminium spinel 49%, white fused alumina 23%, activated alumina 11%, magnesium zirconium eutectic material 8%, cement 3%, water reducer 0.3% (water reducer can be one or more in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, boric acid, ADS, ADW, silicon powder, the organic water reducer of polymer), water 5.7%.Electric furnace bottom electrode cover brick with this mould material cast reaches 550 times work-ing life.ADS wherein, ADW are the water reducer trades mark of Alcoa Inc.

Embodiment three

Contain magnesium-aluminium spinel 46%, white fused alumina 33%, activated alumina 3%, magnesium zirconium eutectic material 5.1%, cement 5%, water reducer ADS or ADW 1.5%, explosion-proof fiber 0.2%, heat-resistant steel fiber 1.2%, water 5%.With this mould material cast ladle nozzle brick cup, reach work-ing life 55 times.

Embodiment four

Contain magnesium-aluminium spinel 65%, white fused alumina 15%, activated alumina 9.49%, magnesium zirconium eutectic material 0.5%, cement 4%, explosion-proof fiber 0.01%, silicon powder 0.5%, water 5.5%.With this mould material cast ladle nozzle brick cup, reach work-ing life 55 times.

Embodiment five

Contain magnesium-aluminium spinel 40%, white fused alumina 40%, activated alumina 5.3%, magnesium zirconium eutectic material 5%, cement 2%, water reducer 0.5%, explosion-proof fiber 0.2%, heat-resistant steel fiber 2.0%, silicon powder 1.0%, water 4%.With this mould material cast ladle nozzle brick cup, reach work-ing life 55 times.

Claims

1, a kind of spinel low-cement functional refractory material pouring material is characterized in that: contain magnesium-aluminium spinel 40-65%, white fused alumina 15-40%, activated alumina 3-15%, magnesium zirconium eutectic material 0.5-8%, cement 2-5%, admixture 0.01～4.7%, water 3-7%.

2, according to the described spinel low-cement functional refractory material pouring material of claim 1, it is characterized in that: contain zirconium dioxide 5-35% in the magnesium zirconium eutectic material.

According to the described spinel low-cement functional refractory material pouring material of claim 1, it is characterized in that 3, admixture comprises one or more in the following material:

Water reducer 0.1-1.5%;

Explosion-proof fiber 0.01-0.2%;

Heat-resistant steel fiber 0.2-2.0%.

According to the described spinel low-cement functional refractory material pouring material of claim 3, it is characterized in that 4, water reducer is one or more of following material: trisodium citrate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, boric acid, ADS, ADW, silicon powder, the organic water reducer of polymer.