CN104557078B

CN104557078B - A kind of high fine and close resistance to thermal shock refractory castable for ladle

Info

Publication number: CN104557078B
Application number: CN201410764236.2A
Authority: CN
Inventors: 江红芬; 应思远; 荆人杰; 费勇; 荆元明; 蒋志忠
Original assignee: CHANGXING YOULIANMA TECHNOLOGY Co Ltd
Current assignee: CHANGXING YOULIANMA TECHNOLOGY Co Ltd
Priority date: 2014-12-12
Filing date: 2014-12-12
Publication date: 2016-08-24
Anticipated expiration: 2034-12-12
Also published as: CN104557078A

Abstract

The invention discloses a kind of high fine and close resistance to thermal shock refractory castable for ladle, being made up of castable base material and additive, the component of described castable base material and percentage by weight are respectively as follows: aluminum-spinel 50～75%, schmigel 10～20%, activity spinel powder 1～10%, fused magnesite fine powder 1～20%, silicon powder 1～7%, activity magnalium glue 2～4%；The component of described additive and percentage by weight are respectively as follows: sodium lignin sulfonate water reducer 1～3%, organic fiber 1～2%, hydroxide silica flour 1～2%, sodium hexameta phosphate 2～3%；The mass percent summation of each component is 100%.The present invention improves its thermal shock resistance and erosion resisting, has stronger suppression osmosis, improves fillibility and agglutinating property, improves consistency, reduces the porosity, improves intensity.It addition, introduce the component that slag is difficult to moisten, slag can be reduced and invade.

Description

A kind of high fine and close resistance to thermal shock refractory castable for ladle

Technical field

The invention belongs to technical field of refractory materials, relate to a kind of high fine and close resistance to thermal shock foundry ladle refractory casting Material.

Background technology

The use link of ladle is one of important step in the whole production line of iron company, if peace Overall height effect is directly connected to produce whether trouble-free operation.At present, tundish is integrated poured is forever lined with Al₂O₃- SiO₂Based material, Al₂O₃-MgO based material, add Low Cement Castable that micropowder and other additive be characterized, A series of product such as ultra-low cement deposit material, cement-free castable, product aggregate fraction commonly use corundum, Mullite, zircon, carborundum, Alumina etc..Anti-wear performance and the thermal shock resistance of castable are poor, become This is the highest.Used by the ladle of normal steel ironworks, refractory material is with the amorphous refractory such as clay brick and high-alumina brick It is main, there is brickwork joint and step, easily make molten iron slag land cause dry slag.And unshape refractory is general It is that material is with Al₂O₃-SiC is main castable, and this material adapts to the use temperature of ladle, and intensity is higher Can improve its service life, be used by most producer, its shortcoming is easily oxidation, and resistance to slag is poor, extensively The suitability is the strongest.

Therefore, how to improve the tight intensity of refractory brick, anti-thermal shock and wearability, be those skilled in the art's mesh The front technical issues that need to address.

Summary of the invention

It is an object of the invention to provide a kind of high fine and close resistance to thermal shock refractory castable for ladle,

For solving technical problem, the present invention adopts the following technical scheme that

A kind of high fine and close resistance to thermal shock refractory castable for ladle, is made up of castable base material and additive, institute State the component of castable base material and percentage by weight be respectively as follows: aluminum-spinel 50～75%, schmigel 10～ 20%, activity spinel powder 1～10%, fused magnesite fine powder 1～20%, silicon powder 1～7%, activity magnalium glue 2～4%；The component of described additive and percentage by weight be respectively as follows: sodium lignin sulfonate water reducer 1～3%, Organic fiber 1～2%, hydroxide silica flour 1～2%, sodium hexameta phosphate 2～3%；The mass percent of each component Summation is 100%.

The castable of the present invention selects superfine or one-level high aluminium material, and principal crystalline phase belongs to Al₂O₃-SiO₂System, can be formed The network interweaved.Castable is hankered and corundum adding due to the aluminum-spinel existed and fused magnesite The spinelle that powder generates produces and expands and micro-crack and the effect of hydroxide silica flour, has buffered material internal Thermal stress, improves its thermal shock resistance and erosion resisting, and meanwhile, molten iron slag is had relatively by substantial amounts of spinelle Strong suppression osmosis.Aluminum oxide fine powder is introduced to improve fillibility and agglutinating property in cast is enough；Grain Degree distribution uses multiple stage material compounding, introduces silicon powder and the measure such as hydroxide silica flour and water reducer, makes construction add water Amount is greatly reduced, thus improves consistency, reduces the porosity, improves intensity.It addition, from controlling chemical mine Thing composition is set about, and adjusts the raw materials used combination of castable, introduces the component that slag is difficult to moisten, can reduce slag Invade.The present invention uses activated carbon aluminium glue as bonding agent, improves and makees the high-purity of bonding agent with activated carbon aluminium glue Magnesium castable and spinelle combine the performance of castable, utilize the activity of magnalium glue, make both excellent performances Goods can burn till at 1550 DEG C, can for firing in the kiln Shanghai of common fire-resistant factory that this kind of senior goods provide Can, but high-purity goods of excellent performance are suffered from higher firing temperature the most always and are restricted, and use and live Property spinel powder can drop to less than 1660 DEG C external superhigh temperature firing process.

Preferably, the component of described castable base material and percentage by weight are respectively as follows: aluminum-spinel 50%, just Beautiful powder 15%, activity spinel powder 10%, fused magnesite fine powder 10%, silicon powder 3%, activity magnalium glue 3%； The component of described additive and percentage by weight be respectively as follows: sodium lignin sulfonate water reducer 3%, organic fiber 2%, Hydroxide silica flour 2%, sodium hexameta phosphate 2%.

Preferably, the component of described castable base material and percentage by weight are respectively as follows: aluminum-spinel 60%, just Beautiful powder 10%, activity spinel powder 5%, fused magnesite fine powder 7%, silicon powder 7%, activity magnalium glue 4%；Institute State the component of additive and percentage by weight be respectively as follows: sodium lignin sulfonate water reducer 2%, organic fiber 1%, Hydroxide silica flour 1%, sodium hexameta phosphate 3%.

Preferably, the component of described castable base material and percentage by weight are respectively as follows: aluminum-spinel 73%, just Beautiful powder 12%, activity spinel powder 2%, fused magnesite fine powder 2%, silicon powder 3%, activity magnalium glue 2%；Institute State the component of additive and percentage by weight be respectively as follows: sodium lignin sulfonate water reducer 1%, organic fiber 2%, Hydroxide silica flour 1%, sodium hexameta phosphate 2%.

Preferably, the granularity size of described schmigel is 1～5mm, the granularity size of activity spinel powder Being 15～40 μm, the granularity size of fused magnesite fine powder is 3～8mm, and the granularity size of silicon powder is 20～50 μm, the granularity size of hydroxide silica flour is 5～15mm.

Compared with prior art, the aluminum-spinel in the present invention and fused magnesite are hankered and schmigel adding The spinelle generated produces and expands and micro-crack, adds the effect of hydroxide silica flour, has buffered material internal Thermal stress, improves its thermal shock resistance and erosion resisting, and meanwhile, molten iron slag is had relatively by substantial amounts of spinelle Strong suppression osmosis.Aluminum oxide fine powder is introduced to improve fillibility and agglutinating property in cast is enough；Grain Degree distribution uses multiple stage material compounding, introduces silicon powder and the measure such as hydroxide silica flour and water reducer, makes construction add water Amount is greatly reduced, thus improves consistency, reduces the porosity, improves intensity.It addition, from controlling chemical mine Thing composition is set about, and adjusts the raw materials used combination of castable, introduces the component that slag is difficult to moisten, can reduce slag Invade.

Below in conjunction with detailed description of the invention, the invention will be further described:

Detailed description of the invention

One height densification resistance to thermal shock refractory castable for ladle embodiment 1 of the present invention, by castable base material and adding Adding agent composition, component and the percentage by weight of described castable base material are respectively as follows: aluminum-spinel 50%, corundum Powder 15%, activity spinel powder 10%, fused magnesite fine powder 10%, silicon powder 3%, activity magnalium glue 3%；Institute State the component of additive and percentage by weight be respectively as follows: sodium lignin sulfonate water reducer 3%, organic fiber 2%, Hydroxide silica flour 2%, sodium hexameta phosphate 2%.Wherein, the granularity size of described schmigel is 1～5mm, lives The granularity size of property spinel powder is 15～40 μm, and the granularity size of fused magnesite fine powder is 3～8mm, The granularity size of silicon powder is 20～50 μm, and the granularity size of hydroxide silica flour is 5～15mm.

One height densification resistance to thermal shock refractory castable for ladle embodiment 2 of the present invention, by castable base material and adding Adding agent composition, component and the percentage by weight of described castable base material are respectively as follows: aluminum-spinel 60%, corundum Powder 10%, activity spinel powder 5%, fused magnesite fine powder 7%, silicon powder 7%, activity magnalium glue 4%；Described The component of additive and percentage by weight are respectively as follows: sodium lignin sulfonate water reducer 2%, organic fiber 1%, hydrogen Silica powder 1%, sodium hexameta phosphate 3%.

One height densification resistance to thermal shock refractory castable for ladle embodiment 3 of the present invention, by castable base material and adding Adding agent composition, component and the percentage by weight of described castable base material are respectively as follows: aluminum-spinel 73%, corundum Powder 12%, activity spinel powder 2%, fused magnesite fine powder 2%, silicon powder 3%, activity magnalium glue 2%；Described The component of additive and percentage by weight are respectively as follows: sodium lignin sulfonate water reducer 1%, organic fiber 2%, hydrogen Silica powder 1%, sodium hexameta phosphate 2%.

The high fine and close resistance to thermal shock refractory castable for ladle obtaining embodiment 1～3 introduces aluminum-spinel and does Aggregate adds in formula with powder, adjusts suitable substrate composition, thus improves the anti-wear performance of castable, Improving thermal shock resistance, under square one, anti-wear performance improves 20～30% than prior art, and thermal shock resistance is More than the twice of prior art.Reduce cost simultaneously, reduce environmental pollution, there is high financial profit, performance The feature accorded with the demands of the market.

The foregoing is only the specific embodiment of the present invention, but the technical characteristic of the present invention be not limited thereto, Any those skilled in the art is in the field of the invention, and change or the modification made all are contained in the present invention The scope of the claims among.

Claims

1. a high fine and close resistance to thermal shock refractory castable for ladle, is made up of castable base material and additive, and it is special Levy and be: the component of described castable base material and percentage by weight be respectively as follows: aluminum-spinel 50～75%, Schmigel 10～20%, activity spinel powder 1～10%, fused magnesite fine powder 1～20%, silicon powder 1～ 7%, activity magnalium glue 2～4%；Component and the percentage by weight of described additive are respectively as follows: sulfomethylated lignin Acid sodium water reducer 1～3%, organic fiber 1～2%, hydroxide silica flour 1～2%, sodium hexameta phosphate 2～3%； The mass percent summation of each component is 100%.

2. a kind of high fine and close resistance to thermal shock refractory castable for ladle as claimed in claim 1, it is characterised in that: The component of described castable base material and percentage by weight be respectively as follows: aluminum-spinel 50%, schmigel 15%, Activity spinel powder 10%, fused magnesite fine powder 10%, silicon powder 3%, activity magnalium glue 3%；Described add Add the component of agent and percentage by weight be respectively as follows: sodium lignin sulfonate water reducer 3%, organic fiber 2%, Hydroxide silica flour 2%, sodium hexameta phosphate 2%.

3. a kind of high fine and close resistance to thermal shock refractory castable for ladle as claimed in claim 1, it is characterised in that: The component of described castable base material and percentage by weight be respectively as follows: aluminum-spinel 60%, schmigel 10%, Activity spinel powder 5%, fused magnesite fine powder 7%, silicon powder 7%, activity magnalium glue 4%；Described interpolation The component of agent and percentage by weight are respectively as follows: sodium lignin sulfonate water reducer 2%, organic fiber 1%, hydrogen Silica powder 1%, sodium hexameta phosphate 3%.

4. a kind of high fine and close resistance to thermal shock refractory castable for ladle as claimed in claim 1, it is characterised in that: The component of described castable base material and percentage by weight be respectively as follows: aluminum-spinel 73%, schmigel 12%, Activity spinel powder 2%, fused magnesite fine powder 2%, silicon powder 3%, activity magnalium glue 2%；Described interpolation The component of agent and percentage by weight are respectively as follows: sodium lignin sulfonate water reducer 1%, organic fiber 2%, hydrogen Silica powder 1%, sodium hexameta phosphate 2%.

5. a kind of high fine and close resistance to thermal shock refractory castable for ladle as described in Claims 1-4 any one, It is characterized in that: the granularity size of described schmigel is 1～5mm, the granularity of activity spinel powder is big Little is 15～40 μm, and the granularity size of fused magnesite fine powder is 3～8mm, and the granularity of silicon powder is big Little is 20～50 μm, and the granularity size of hydroxide silica flour is 5～15mm.