CN102249719B - Light-burning corundum precast block for refining steel ladle - Google Patents
Light-burning corundum precast block for refining steel ladle Download PDFInfo
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- CN102249719B CN102249719B CN 201110173029 CN201110173029A CN102249719B CN 102249719 B CN102249719 B CN 102249719B CN 201110173029 CN201110173029 CN 201110173029 CN 201110173029 A CN201110173029 A CN 201110173029A CN 102249719 B CN102249719 B CN 102249719B
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Abstract
The invention discloses a light-burning corundum precast block for a refining steel ladle, comprising the following raw materials: 60-75 parts of corundum granules, 6-18 parts of fine corundum powder, 3-8 parts of fused magnesia powder, 2-5 parts of rho-Al2O3 micro powder, 0-3 parts of Falaki cement, 5-15 parts of synthesized spinel powder, 3-7 parts of alpha-Al2O3 micro powder, 0-0.1 part of coagulant, 0.1-1.5 parts of water reducing agent. A preparation method of the light-burning corundum precast block comprises the following steps of: placing the raw materials into a blender and carrying out dry blending for 5 minutes, and then adding a right amount of water and uniformly blending; pouring the mixture into a mould for vibration moulding; carrying out natural curing for 2 hours, and then demoulding; drying till moisture is less than 0.5 percent, then placing a blank body into a kiln, and sintering at 1300-1400 DEG C under ordinary pressure so as to obtain the light-burning corundum precast block. The invention has the advantages that a formula of the raw materials of the traditional corundum precast block is changed; a certain quantity of spinel interlocking structures are generated through presintering at specific temperature so that the thermodynamic property of the corundum precast block is changed, and therefore, the using property of the corundum precast block is enhanced and a product is greatly superior to the corundum precast block obtained through low-temperature processing in the loading and unloading/transporting/masoning/baking/using process.
Description
Technical field
The present invention relates to Carbon-free refractories, especially relate to a kind of light-burning corundum precast block for refining steel ladle.
Background technology
Along with popularizing and widespread use of liquid steel refining and Liquid Iron Pretreatment Technology, for the control Cleanliness of Molten Steel, avoid to greatest extent refractory materials that the pollution of melted steel container has been proposed harsher requirement when smelting low carbon steel, ultra low-carbon steel, for this reason, research and development low-carbon (LC), Ultra-low carbon and Carbon-free refractories goods are anti-material industry obligation one can't decline and obligation.
Summary of the invention
The object of the present invention is to provide a kind of Carbon-free refractories that is suitable for refined steel ladles-light-burned corundum prefabricated section, these goods can be applicable to 300 tons and above ladle liner.
For achieving the above object, the present invention can take following technical proposals:
Light-burning corundum precast block for refining steel ladle of the present invention, comprise raw material corundum in granules, corundum fine powder, electrofusion magnesia powder, ρ-Al O3, the basic cement of farad, synthetic spinel, α-Al O, setting accelerator and water reducer, the weight part proportioning of described raw material is:
Corundum in granules 60-75 part of particle diameter 0.1-10mm, particle diameter 200 purpose corundum fine powder 6-18 parts, particle diameter 200 purpose electrofusion magnesia powder 3-8 parts, ρ-Al O
3Micro mist 2-5 part, the basic cement 0-3 part of farad, particle diameter 200 purpose synthetic spinel powder 5-15 parts, α-Al O micro mist 3-7 part, setting accelerator 0-0.1 part, water reducer 0.1-1.5 part;
According to said ratio each raw material is put into and to be added suitable quantity of water after stirrer is dry mixed 5 minutes and mix, pour mould internal vibration moulding into, natural curing demoulding after 2 hours, being dried to the rear base substrate of moisture＜0.5% enters a kiln 1300-1400 ℃ normal pressure and burns till, the physical and chemical index of moulded products is: void content≤17%, volume density 〉=3.0g/cm
3, MgO 3-8%, Al
2O
3+ MgO 〉=92%, compressive strength 〉=90MPa, folding strength 〉=12MPa, line variability ± 0.1%.
Described corundum comprises plate diamond spar, white fused alumina, brown corundum.
The invention has the advantages that the prescription that has changed traditional corundum prefabricated section raw material, pre-burning by specified temp, generate a certain amount of spinel interlocking structure, changed the thermomechanical property of corundum prefabricated section, thereby improved the use properties of corundum prefabricated section, make goods loading and unloading/transporting/building by laying bricks or stones/toast/use procedure in, be superior to greatly the corundum prefabricated section of subzero treatment.
Embodiment
Embodiment 1:
Light-burning corundum precast block for refining steel ladle of the present invention comprises the raw material of following weight parts proportioning:
20 parts of the plate diamond spars of 5mm＜granularity≤10mm, 17 parts of the plate diamond spars of 3mm＜granularity≤5mm, 16 parts of the plate diamond spars of 1mm＜granularity≤3mm, 0.1mm 7 parts of the plate diamond spars of＜granularity≤1mm, 6 parts of plate diamond spar fine powders (particle diameter 200 orders), 3 parts of electrofusion magnesia powders (particle diameter 200 orders), ρ-Al O
35 parts of micro mists, 5 parts in synthetic spinel powder (particle diameter 200 orders), 3 parts of α-Al O micro mist, 0.1 part of ADW1 setting accelerator, 0.02 part of FS-10 water reducer, 0.08 part of FW10 water reducer;
In advance mould is assembled by compact dimensions, be coated with lubricant on the die wall, place on the shaking table, according to said ratio each raw material is put into and to be added 4 parts in water after stirrer is dry mixed 5 minutes and mix, pour mould internal vibration moulding into, surperficial troweling, natural curing demoulding after 2 hours; Work in-process after the moulding are moved in the drying shed by the drying curve drying that slowly heats up, and dry terminal temperature is controlled between 200-300 ℃, and time of drying should be greater than 24 hours, dry after the residual water-content＜0.5% of goods; Dried goods are contained on the kiln car by the entrucking requirement, push in shuttle kiln or the tunnel furnace, be warming up to 1300-1400 ℃ by the heating curve requirement, be incubated and naturally cool to normal temperature after 4 hours, open wicket behind naturally cooling kiln discharge both light-burned corundum prefabricated section finished product; The change index of moulded products is: void content≤17%, volume density 〉=3.0g/cm
3, MgO 3-8%, Al
2O
3+ MgO 〉=92%, compressive strength 〉=90MPa, folding strength 〉=12MPa, line variability ± 0.1%; The finished product block-by-block is checked, marked, the packing warehouse-in.
Embodiment 2:
Light-burning corundum precast block for refining steel ladle of the present invention comprises the raw material of following weight parts proportioning:
24 parts in the brown corundum of 5mm＜granularity≤10mm, 5 parts in the brown corundum of 3mm＜granularity≤5mm, 12 parts of the white fused aluminas of 3mm＜granularity≤5mm, 14 parts of the plate diamond spars of 1mm＜granularity≤3mm, 0.1mm 12 parts of the plate diamond spars of＜granularity≤1mm, 10 parts of plate diamond spar fine powders (particle diameter 200 orders), 5 parts of electrofusion magnesia powders (particle diameter 200 orders), ρ-Al O
32 parts of micro mists, 10 parts in synthetic spinel powder (particle diameter 200 orders), 5 parts of α-Al O micro mist, 1.5 parts of the basic cement of farad, 0.5 part of FS-10 water reducer, 0.3 part of FW10 water reducer;
The preparation method is with embodiment 1.
Embodiment 3:
Light-burning corundum precast block for refining steel ladle of the present invention comprises the raw material of following weight parts proportioning:
26 parts in the brown corundum of 5mm＜granularity≤10mm, 6 parts in the brown corundum of 3mm＜granularity≤5mm, 14 parts of the white fused aluminas of 3mm＜granularity≤5mm, 15 parts of the plate diamond spars of 1mm＜granularity≤3mm, 0.1mm 14 parts of the plate diamond spars of＜granularity≤1mm, 18 parts of plate diamond spar fine powders (particle diameter 200 orders), 8 parts of electrofusion magnesia powders (particle diameter 200 orders), ρ-Al O
34 parts of micro mists, 15 parts in synthetic spinel powder (particle diameter 200 orders), 7 parts of α-Al O micro mist, 0.5 part of FS-10 water reducer, 1 part of FW10 water reducer;
The preparation method is with embodiment 1.
Claims (2)
1. light-burning corundum precast block for refining steel ladle, it is characterized in that: comprise raw material corundum in granules, corundum fine powder, electrofusion magnesia powder, ρ-Al O3, the basic cement of farad, synthetic spinel, α-Al O, setting accelerator and water reducer, the weight part proportioning of described raw material is:
Corundum in granules 60-75 part of particle diameter 0.1-10mm, particle diameter 200 purpose corundum fine powder 6-18 parts, particle diameter 200 purpose electrofusion magnesia powder 3-8 parts, ρ-Al O
3Micro mist 2-5 part, the basic cement 0-3 part of farad, particle diameter 200 purpose synthetic spinel powder 5-15 parts, α-Al O micro mist 3-7 part, setting accelerator 0-0.1 part, water reducer 0.1-1.5 part;
According to said ratio each raw material is put into and to be added suitable quantity of water after stirrer is dry mixed 5 minutes and mix, pour mould internal vibration moulding into, natural curing demoulding after 2 hours, being dried to the rear base substrate of moisture＜0.5% enters a kiln 1300-1400 ℃ normal pressure and burns till, the physical and chemical index of moulded products is: void content≤17%, volume density 〉=3.0g/cm
3, MgO 3-8%, Al
2O
3+ MgO 〉=92%, compressive strength 〉=90MPa, folding strength 〉=12MPa, line variability ± 0.1%.
2. light-burning corundum precast block for refining steel ladle according to claim 1, it is characterized in that: described corundum comprises plate diamond spar, white fused alumina, brown corundum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110173029 CN102249719B (en) | 2011-06-24 | 2011-06-24 | Light-burning corundum precast block for refining steel ladle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110173029 CN102249719B (en) | 2011-06-24 | 2011-06-24 | Light-burning corundum precast block for refining steel ladle |
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| CN102249719A CN102249719A (en) | 2011-11-23 |
| CN102249719B true CN102249719B (en) | 2013-03-06 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775114B (en) * | 2012-07-30 | 2013-10-23 | 浙江锦诚耐火材料有限公司 | Choke block for aluminum electrolytic bath |
| CN106064422B (en) * | 2016-07-29 | 2018-07-13 | 山西高科耐火材料股份有限公司 | The production mould and its application method of refined steel ladles small-sized precast block |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740115A (en) * | 2004-08-25 | 2006-03-01 | 武汉科技大学 | Sailon corundum refractory material for permeable ladle stopper and its prepn process |
| CN1891670A (en) * | 2005-07-07 | 2007-01-10 | 江苏苏嘉集团新材料有限公司 | Spinel low-cement functional refractory material pouring material |
| CN101157562A (en) * | 2007-09-21 | 2008-04-09 | 郑州荣达工矿集团有限公司 | Corundum ladle seat brick casting material |
| CN101607827A (en) * | 2009-07-20 | 2009-12-23 | 卫辉熔金高温材料有限责任公司 | Steel ladle using casting material prefabricated lower casting nozzle brick and production method thereof |
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
-
2011
- 2011-06-24 CN CN 201110173029 patent/CN102249719B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740115A (en) * | 2004-08-25 | 2006-03-01 | 武汉科技大学 | Sailon corundum refractory material for permeable ladle stopper and its prepn process |
| CN1891670A (en) * | 2005-07-07 | 2007-01-10 | 江苏苏嘉集团新材料有限公司 | Spinel low-cement functional refractory material pouring material |
| CN101157562A (en) * | 2007-09-21 | 2008-04-09 | 郑州荣达工矿集团有限公司 | Corundum ladle seat brick casting material |
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
| CN101607827A (en) * | 2009-07-20 | 2009-12-23 | 卫辉熔金高温材料有限责任公司 | Steel ladle using casting material prefabricated lower casting nozzle brick and production method thereof |
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