CN106365646A

CN106365646A - Refractory

Info

Publication number: CN106365646A
Application number: CN201610732047.6A
Authority: CN
Inventors: 张婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-02
Filing date: 2015-07-02
Publication date: 2017-02-01
Also published as: CN106365647A; CN104944990A; CN106220206A; CN104944990B

Abstract

The invention relates to a refractory, in particular a refractory used for ladle lining or work layer. The technical problem to be solved is to provide a refractory; the service part is the direct inner lining of the touch point between steel ladle and liquid steel. The refractory is prepared from, by weight, 8-20% of sub-white fused alumina 12-8 mm, l1-15% of sintered porous alumina spinel 8-5 mm, 12-15% of sintered porous alumina spinel 5-3 mm, 10-15% of sintered porous alumina spinel 3-l mm, 30-35% sintered porous alumina spinel <= 1mm, 0-5% of modified calcium magnesium sand <= 1mm, 1% of two-carbon three-chromium powder, 3-5% of compound gel powder, 1% of hydrate alumina powder, 1% of pearl clay powder, 0.5% of germanium acid bismuth powder, 3-5% of modified pure calcium aluminate cement, and an additional 0.1% of C7H10N2O2S, 0.1% of C21H14Na2O6S2, 0.05% of 2-morpholineethanesulfonic acid. The refractory can decrease the reaction degree between the ladle lining material and the slag; increases the resistance of slags, the high-temperature performance of steel ladle products and the corrosion resistance of slags. The refractory substantially strengthens the thermal shock resistance of steel ladle, effectively increases the service life of the overall refractory steel ladle, the increase is 30% or more than the service life of same-type normal steel ladle.

Description

A kind of castable

The application is the divisional application of Application No. 201510380582.5.

Technical field

The present invention relates to a kind of refractory material, specifically a kind of castable refractory using in steel ladle working layer.

Background technology

It is referred to as steel ladle working layer with the refractory material of molten steel directly contact in ladle.In prior art, steel ladle working layer is general Using spinel pouring material, but the properties of current ladle liner are general, therefore, directly affects the service life of ladle, How to improve the service life of ladle, the performance improving steel ladle working layer is the most key, therefore the performance of ladle liner castable Improve and become the key extending ladle service life.

Content of the invention

In order to solve above-mentioned technical problem, the present invention provides a kind of castable, can reduce lining material in the ladle and slag The extent of reaction, improve high-temperature behavior, the anti-scour property of its slag resistance ladle product, be added significantly to the heat resistanceheat resistant of ladle Shock stability, generally improves the combination property of ladle, and the service life of final ladle is significantly increased.

The technical problem to be solved is to provide a kind of castable, straight for ladle and steel contacts using position Connect liner, wherein each weight percentages of components is: sub-white corundum 12 8mm is 8～20%, sintered microporous aluminate 8 5mm For l1～15%, sintered microporous aluminate 5 3mm be 12～15%, sintered microporous aluminate 3 one lmm be 10～15%, Sintered microporous aluminate≤1mm is 30～35%, modified calcium magnesite≤1mm0～5%, Cr3C2 powder 1%, pluralgel Powder 3～5%, hydrated alumina micropowder 1%, nacrite powder 1%, germanic acid bismuth meal 0.5%, modified pure calcium aluminate cement 3～5%, outward Plus c₇h₁₀n₂o₂S0.1%, c₂₁h₁₄na₂o₆s₂0.1%, MES 0.05%.

Described pluralgel powder is the composite powder of zirconium gel powder and alumina gel powder, and its weight ratio is for 1:2.

Described modification calcium magnesite refers to calcium magnesite h₂c₂o₄Carry out dipping and carbonating is processed, so that film on MgO-CaO clinker is formed The coating film of hydration-resisting.

Described sintered microporous aluminate is alumina content >=78%, aperture≤5 micron of micropore of remaining silent, micropore of remaining silent Account for more than the 80% of total pore.

Aluminium content >=30% of described nacrite.

, for adding 5% aluminate in cement production process, 3% zirconium carbonate is again through height for described modification pure calcium aluminate cement The characteristic cement that temperature sintering manufactures, aluminium content >=75% of modified calcium aluminate cement.

The invention has the beneficial effects as follows:

The present invention can reduce the extent of reaction of lining material in the ladle and slag, improves the high temperatures of its slag resistance ladle product Energy, anti-scour property, are added significantly to the thermal shock resistance of ladle, effectively increase the service life of integrated poured ladle, Improve more than 30% than the ladle life of conventional same type.

Specific embodiment

Embodiment 1:

A kind of castable, using position for ladle and steel contacts direct liner, wherein each weight percentages of components is: each group Point percentage by weight is: sub-white corundum 12 8mm is 15%, sintered microporous aluminate 8 5mm is 14%, sintered microporous aluminum Spinelle 5 3mm is 15%, and sintered microporous aluminate 3 one lmm is 13%, sintered microporous aluminate≤1mm is 30%, Cr3C2 powder 1%, pluralgel powder 5%, hydrated alumina micropowder 1%, nacrite powder 1%, germanic acid bismuth meal 0.5% is modified pure Aluminous cement 4.5%, additional c₇h₁₀n₂o₂S0.1%, c₂₁h₁₄na₂o₆s₂0.1%, MES 0.05%.Join above-mentioned Material mix homogeneously obtains final product pouring materialfor steel ladle.

Experiment test: the additional water accounting for above-mentioned formula proportion weight 5wt% is carried out with a kind of casting material formula of embodiment 1, Test performance index is as follows: bulk density is 2.9/cm³；After 1600 DEG C × 3h burns, rupture strength is 18.5mpa；1600℃× After 3h burns, compressive resistance is 78.2mpa；After 1100 DEG C of water-cooleds 10 times, rupture strength conservation rate is 40.12%；1500 DEG C of revolution crucibles Method anti-slag tests erosion index 15.2%；Penetration index 25.2%.Basicity cao/sio2=2.03 of the slag that experiment uses.Than normal The ladle life of rule same type improves more than 30%.

Embodiment 2:

A kind of castable, wherein each weight percentages of components is: each weight percentages of components is: sub-white corundum 12 8mm is 14%th, sintered microporous aluminate 8 5mm be 15%, sintered microporous aluminate 5 3mm be 15%, sintered microporous aluminum point is brilliant Stone 3 one lmm is 12%, sintered microporous aluminate≤1mm is 30%, and modified calcium magnesite≤1mm is 2%, Cr3C2 powder 1%, pluralgel powder 5%, hydrated alumina micropowder 1%, nacrite powder 1%, germanic acid bismuth meal 0.5%, modified pure calcium aluminate cement 3.5%, additional c₇h₁₀n₂o₂S0.1%, c₂₁h₁₄na₂o₆s₂0.1%, MES 0.05%.By above-mentioned dispensing mix homogeneously Obtain final product pouring materialfor steel ladle.

Experiment test: the additional water accounting for above-mentioned formula proportion weight 6wt% is carried out with the casting material formula of embodiment 2, test Performance indications are as follows: bulk density is 2.9/cm³；After 1600 DEG C × 3h burns, rupture strength is 17.56mpa；1600 DEG C × 3h burns Compressive resistance is 70.8mpa afterwards；After 1100 DEG C of water-cooleds 10 times, rupture strength conservation rate is 54%；1500 DEG C of revolution crucible method anti-slags Experiment erosion index 13%；Penetration index 20%.Basicity cao/sio2=2.03 of the slag that experiment uses.Than conventional same type Ladle life improves more than 34%.

Claims

1. a kind of castable is it is characterised in that each weight percentages of components is: sub-white corundum 12 8mm is 8～20%, sintering Micropore aluminate 8 5mm is l1～15%, sintered microporous aluminate 5 3mm is 12～15%, and sintered microporous aluminum point is brilliant Stone 3 one lmm is 10～15%, sintered microporous aluminate≤1mm is 30～35%, modified calcium magnesite≤1mm0～5%, two carbon Change three chromium powders 1%, pluralgel powder 3～5%, hydrated alumina micropowder 1%, nacrite powder 1%, germanic acid bismuth meal 0.5%, modification is pure Aluminous cement 3～5%, additional c₇h₁₀n₂o₂S0.1%, c₂₁h₁₄na₂o₆s₂0.1%, MES 0.05%.

2. as claimed in claim 1 a kind of castable it is characterised in that described pluralgel powder is zirconium gel powder and aluminum coagulates The composite powder of rubber powder, its weight is than for 1:2.

3. as claimed in claim 1 a kind of castable it is characterised in that described sintered microporous aluminate be alumina content >=78%, aperture≤5 micron of micropore of remaining silent, micropore of remaining silent accounts for more than the 80% of total pore.

4. as claimed in claim 1 a kind of castable it is characterised in that described modification calcium magnesite refer to calcium magnesite h₂c₂o₄Enter Row dipping and carbonating are processed, and make film on MgO-CaO clinker form the coating film of hydration-resisting.

5. as claimed in claim 1 a kind of castable it is characterised in that aluminium content >=30% of described nacrite.

6. as claimed in claim 1 a kind of castable it is characterised in that described modification pure calcium aluminate cement be manufacture of cement mistake 5% aluminate is added in journey, the characteristic cement that 3% zirconium carbonate manufactures through high temperature sintering again, modified calcium aluminate cement Aluminium content >=75%.