CN105903918A - Silicon-carbon drainage agent and preparation method thereof - Google Patents
Silicon-carbon drainage agent and preparation method thereof Download PDFInfo
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- CN105903918A CN105903918A CN201610449594.3A CN201610449594A CN105903918A CN 105903918 A CN105903918 A CN 105903918A CN 201610449594 A CN201610449594 A CN 201610449594A CN 105903918 A CN105903918 A CN 105903918A
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- carborundum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
- B22D41/46—Refractory plugging masses
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
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Abstract
The invention discloses a silicon-carbon drainage agent and a preparation method thereof, and relates to the field of metallurgy. The drainage agent is composed of, by weight, 60-80 parts of quartz sand with the particle size being 0.3-0.6 mm, 1-10 parts of phosphorus slice graphite powder with the particle size being 325 meshes and the passing rate being 97%, 10-28 parts of silicon carbide with the particle size being 0.3-0.6 mm and 1-5 parts of binding agent. The preparation method of the silicon-carbon drainage agent comprises the following steps of dry mixing, wet mixing and drying. Various raw materials used for preparing the silicon-carbon drainage agent do not pollute the environment and molten steel, no impurity can be introduced in the molten steel smelting process, the purity of the molten steel of fine steel is ensured, and the requirements for using of market quality goods and cleaner production are met. The drainage agent prepared through the method is stable in performance, good in liquidity, low in heat conductivity coefficient, good in penetration resistance at high temperatures, and the free opening rate of steel ladles is increased. On the premise that the product performance is not lowered, low-price materials are used for replacing high-grade materials, and the cost is reduced.
Description
Technical field
The present invention relates to field of metallurgy, particularly relate to a kind of silicon-carbon draining ageng and preparation method thereof.
Background technology
Steel ladle drainage agent is a kind of high temperature resistant, thermal stability good, corrosion resistance is extremely strong refractory material, fill in steel pouring process in ladle upper nozzle, prevent ladle by after steel, molten steel enters in filling pipe end, open water time drainage agent can automatically fall, then molten steel flows in tundish from the mouth of a river therewith, is to ensure that continuous casting produces a kind of refractory material necessary to direct motion.
Drainage agent used by steel mill is mainly with the three major types such as siliceous, chromium matter, zirconium matter the most both at home and abroad, feeds back through life-time service and consumers' opinions, there is problems with: silica fire resistant degree is relatively low, and the coefficient of expansion is relatively big, and self-opening rate is relatively low；Chromium matter is with improving refractoriness, but this material heat transfer coefficient is higher, easily occurs excess agglomeration phenomenon in the mouth of a river, and it is serious to pollute molten steel, and it is unfavorable to there is the quality of fine work steel；Though zirconium draining ageng can solve problem above, but relatively costly, it is impossible to adapt to the need of current iron and steel enterprise energy saving and cost lowering.
Summary of the invention
The shortcoming that the present invention is to solve above-mentioned prior art, it is provided that a kind of silicon-carbon draining ageng and preparation method thereof, the drainage agent that this preparation method is produced can improve self-opening rate, it is possible to ensures the molten steel degree of purity of fine work steel, and can reduce cost.
The present invention is achieved in that a kind of silicon-carbon draining ageng, it is made up of the raw material of following weight portion: granularity is quartz sand 60-80 part of 0.3-0.6mm, granularity 325 mesh and scale graphite powder 1-10 part that percent of pass is 97%, granularity is carborundum 10-28 part of 0.3-0.6mm, binding agent 1-5 part.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2 65-80%, SiC 8-28%, C 2.5-8%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 2-10 minute, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 2-10 minute, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 5-15 minute so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be less than or equal to 500 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
Relative to prior art, the invention has the beneficial effects as follows:
The various raw materials used by silicon-carbon draining ageng prepared by the present invention, all pollution-free to environment molten steel, molten steel smelting process will not introduce impurity, it is ensured that the molten steel degree of purity of fine work steel, meet the requirement using and cleaning production of market fine work.Using drainage agent at high temperature stable performance prepared by the present invention, good fluidity, heat conductivity is low, and permeability resistance is good, improves the self-opening rate of ladle.On the premise of not reducing properties of product, inexpensive material replaces high-grade material, reduces cost.
Detailed description of the invention
Embodiment 1
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is quartz sand 60-80 part of 0.3-0.6mm, granularity 325 mesh and scale graphite powder 1-10 part that percent of pass is 97%, and granularity is carborundum 10-28 part of 0.3-0.6mm, binding agent 1-5 part.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2 65-80%, SiC 8-28%, C 2.5-8%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 2-10 minute, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 2-10 minute, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 5-15 minute so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be less than or equal to 500 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment 2
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is quartz sand 65-75 part of 0.4-0.5mm, granularity 325 mesh and scale graphite powder 3-7 part that percent of pass is 97%, and granularity is carborundum 15-23 part of 0.4-0.5mm, binding agent 1-3 part.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2 70-75%, SiC 15-20%, C 4-7%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 5-6 minute, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 3-8 minute, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 8-12 minute so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be less than or equal to 450 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment 3
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is the quartz sand 70 parts of 0.4mm, granularity 325 mesh and 5 parts of the scale graphite powder that percent of pass is 97%, and granularity is the carborundum 20 parts of 0.4mm, binding agent 2 parts.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2 72%, SiC 18%, C 5%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 5 minutes, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 5 minutes, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 10 minutes so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be equal to 430 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment 4
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is the quartz sand 60 parts of 0.3mm, granularity 325 mesh and 1 part of the scale graphite powder that percent of pass is 97%, and granularity is the carborundum 10 parts of 0.3mm, binding agent 1 part.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2 65%, SiC 8%, C 2.5%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 2 minutes, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 2 minutes, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 5 minutes so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be equal to 400 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment 5
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is the quartz sand 80 parts of 0.6mm, granularity 325 mesh and 10 parts of the scale graphite powder that percent of pass is 97%, and granularity is the carborundum 28 parts of 0.6mm, binding agent 5 parts.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2
80%, SiC 28%, C 8%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 10 minutes, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 10 minutes, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 15 minutes so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be equal to 500 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment 6
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is the quartz sand 65 parts of 0.4mm, granularity 325 mesh and 3 parts of the scale graphite powder that percent of pass is 97%, and granularity is the carborundum 15 parts of 0.4mm, binding agent 1 part.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2 70%, SiC 15%, C 4%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 5 minutes, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 3 minutes, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 8 minutes so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be equal to 430 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment 7
A kind of silicon-carbon draining ageng, is made up of the raw material of following weight portion: granularity is the quartz sand 75 parts of 0.5mm, granularity 325 mesh and 7 parts of the scale graphite powder that percent of pass is 97%, and granularity is the carborundum 23 parts of 0.5mm, binding agent 3 parts.
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
The mass percent of its effective ingredient is: SiO2
75%, SiC 20%, C 7%, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
A kind of preparation method of the silicon-carbon draining ageng described in basis, comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 6 minutes, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 8 minutes, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 12 minutes so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be equal to 450 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Other embodiments
A kind of silicon-carbon draining ageng, forms according to the raw material of the weight portion shown in table 1:
Table 1
SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
In described carborundum, the percetage by weight of carborundum is more than 90%.
The percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
SiO in the effective ingredient of described silicon-carbon draining ageng2 , SiC and C mass percent as shown in table 1, remaining is trace element.Described trace element is ferrum oxide, calcium oxide and magnesium oxide.
The present invention is by the drainage agent prepared by described raw material, pollution-free to molten steel, and self-opening rate, up to more than 99%, therefore adapts to the use demand of current fine work steel grade.Quartz sand in raw material, by high-grade quartz through crushing, grind, sieving processing, there is the advantages such as silicone content is high, fillet coefficient is big, refractoriness is high, granularity selection moderate, the coefficient of expansion is little, heat transfer coefficient low and high temperature good fluidity, and select the granularmetric composition of 0.3-0.6mm, can effectively stop the infiltration of molten steel, reduce the sinter layer thickness of drainage agent.Carborundum refractoriness caking power high, anti-is strong, have stable high-temperature performance, subsidiary Fe2O3、Al2O3, the harmful element such as MgO low, replace traditional chromium ore in sand form can reduce the pollution to molten steel with this.Preparing through the collocation of reasonable material and special process, can reach the using effect of chrome ore, and can reduce production cost, it is high that scale graphite has fusing point, and insulation effect is good, can stop the molten steel heat transfer to drainage agent, can improve again the mobility of product.
The preparation method of a kind of described silicon-carbon draining ageng, comprises the steps:
Table 2
Implement the steps of according to the embodiment combination in any of each variable in table 2:
(1) according to any one embodiment in embodiment 8-55 by quartz sand and carborundum by join join blender in stir 2-10 minute, be mixed；(2) add in blender according to the high-temperature adhesives spray of the liquid in the embodiment selected in step (1), stir 2-10 minute, make first two granular material surface be sufficiently humidified so as to；(3) add in blender according to the scale graphite powder in the embodiment selected in step (1), stir 5-15 minute so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be less than or equal to 500 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
This preparation method, by after quartz sand overlay film, can replace the using effect of chrome ore, and heat transfer coefficient is low, prevents infiltration of molten steel good, pollution-free to molten steel, effectively reduces production cost.Carborundum fillet coefficient after scale graphite overlay film is big, and proportion is moderate, good flowing properties, can be effectively improved product refractoriness, reduces the sinter layer thickness of drainage agent.The combination of scale graphite and high temperature inorganic binding agent can fully overlay film on the surface of granular material, compared with traditional Adding Way, the product using effect using preparation method of the present invention to obtain is more preferable, traditional method uses organic bond, this bonding agent refractoriness is low, during using after the drying, bonding effect can be lost by high temperature cabonization, carbonaceous material is caused to separate with granular material, do not have ideal effect, and drainage agent mobility can be made to be deteriorated, and refractoriness reduces, the self-opening rate of product is affected bigger.
Embodiment described above, the simply one of the present invention more preferably detailed description of the invention, the usual variations and alternatives that those skilled in the art is carried out in the range of technical solution of the present invention are intended to be included in protection scope of the present invention.
Claims (7)
1. a silicon-carbon draining ageng, it is characterized in that: be made up of the raw material of following weight portion: granularity is quartz sand 60-80 part of 0.3-0.6mm, granularity 325 mesh and scale graphite powder 1-10 part that percent of pass is 97%, granularity is carborundum 10-28 part of 0.3-0.6mm, binding agent 1-5 part.
Silicon-carbon draining ageng the most according to claim 1, it is characterised in that: SiO in described quartz sand2Percetage by weight more than or equal to 98%, Fe in quartz sand2O3Percentage by weight less than 0.3%.
Silicon-carbon draining ageng the most according to claim 1, it is characterised in that: in described carborundum, the percetage by weight of carborundum is more than 90%.
Silicon-carbon draining ageng the most according to claim 1, it is characterised in that: the percetage by weight of the described fixed carbon in scale graphite powder is more than 90%.
Silicon-carbon draining ageng the most according to claim 1, it is characterised in that: the mass percent of its effective ingredient is: SiO2 65-80%, SiC 8-28%, C
2.5-8%, remaining is trace element.
Silicon-carbon draining ageng the most according to claim 5, it is characterised in that: described trace element is ferrum oxide, calcium oxide and magnesium oxide.
7. the preparation method according to the arbitrary described silicon-carbon draining ageng of claim 1-5, it is characterised in that: comprise the steps: (1) by quartz sand and carborundum by join join blender in stir 2-10 minute, be mixed；(2) binding agent of liquid is sprayed in addition blender, stir 2-10 minute, make first two granular material surface be sufficiently humidified so as to；(3) scale graphite powder is added in blender, stir 5-15 minute so that it is fully overlay film, behind granular material surface, is dried；(4) dry temperature and be less than or equal to 500 DEG C, dry to moisture in product less than or equal to 0.1%(w/w) after, product is carried out metering packing warehouse-in.
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