CN101665365B - Refractory material of carbon protective sleeve and preparation method thereof - Google Patents
Refractory material of carbon protective sleeve and preparation method thereof Download PDFInfo
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- CN101665365B CN101665365B CN2009101804926A CN200910180492A CN101665365B CN 101665365 B CN101665365 B CN 101665365B CN 2009101804926 A CN2009101804926 A CN 2009101804926A CN 200910180492 A CN200910180492 A CN 200910180492A CN 101665365 B CN101665365 B CN 101665365B
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Abstract
The invention discloses a refractory material of a mold protective sleeve and a preparation method thereof, and the refractory material comprises the following components: 40%-60% of carbon material, 2%-10% of ultrafine carbon material, 2%-5% of anti-oxidant, 20%-40% of non-oxide abrasive and 3%-8% of binding agent. The prepration method comprises the following steps: selecting the carbon material, adding the ultrafine carbon material, the anti-oxidant and the binding agent, mixing the ingredients, then pressing into a product with the required size, drying the product at the temperature of about 180 DEG C, impregnating in asphalt, cooling, and finally carrying out baking treatment on the product. The carbon material with the low price is used for replacing the material of the high-aluminum mold protective sleeve, thereby prolonging the service life of the vacuum cast ingot protective sleeve and reducing the consumption and the production cost of the refractory material.
Description
Technical field
The present invention relates to technical field of refractory materials, relate in particular to a kind of refractory material of carbon protective sleeve that is used for the steel ingot casting and preparation method thereof.
Background technology
At present, iron and steel enterprise all adopts the method for vacuum-casting to produce steel ingot when producing steel ingot basically.Because single ingot weight ratio is bigger, be generally 70-80 ton steel ingot in process of production, maximum steel ingot weighs 300 tons, thereby the time that causes pouring into a mould is long, and the ingot mold refractory sleeve is impaired seriously.Also there is the high alumina refractories of use to build the mold telescopic by laying bricks or stones both at home and abroad; As one Chinese patent application number be 4191849.1, name is called " pattern of casting of metals and method and be used for fire proofing composition wherein ", disclose a kind of alumina content that comprises and be at least about 40% weight, salic and the hollow microsphere of silicon-dioxide and a kind of bonded refractory composition of sticker.Said composition can be in suitable mold, by hand or with mechanical hammering blending ingredients or with air blast or spray blending ingredients, they is sent into the method in the mold, makes the profiled member such as forms such as sleeve or templates.But the fire proofing composition of this patent is that to be at least about the hollow microsphere and the sticker of salic and silicon-dioxide of 40% weight with alumina content made; The mold sleeve pipe of building by laying bricks or stones with high alumina refractories is the same; It is fast to cause steel outlet hole to corrode in use easily; Varying aperture is big, washes away seriously, and the bottom is prone to dross.
The external mold graphite protective casing that the use global formation is also arranged.But its to the overall dimensions of equipment with very high requirement is installed, and the component content that is adopted etc. not too is fit to the deficiencies such as actual production requirement of enterprise, its valuable product of this external cause, production cost significantly increases and rare use.
Summary of the invention
The objective of the invention is to solve the problem of above-mentioned high alumina matter and the appearance of graphite matter mold sleeve pipe, and a kind of mold protective casing material that substitutes high alumina matter with cheap carbon materials is provided.Prolonged the work-ing life of ingot casting protective casing, reduce the consumption and the production cost of refractory materials.
Technical solution of the present invention is following: one of technical scheme is a kind of refractory materials of carbon protective sleeve; Its characteristics are to comprise by percentage to the quality the carbon materials of following component: 40%-60%; The ultra-fine carbon materials of 2%-10%; The oxidation inhibitor of 2%-5%, the non-oxidized substance abrasive material of 20%-40%, 3%～8% wedding agent.
Two of technical scheme of the present invention is the preparation method of refractory material of carbon protective sleeve, and adopts this refractory materials of following steps preparation:
A selects for use following component to carry out proportioning by percentage to the quality: 40%-60% carbon materials, the ultra-fine carbon materials of 2%-10%, the oxidation inhibitor of 2%-5%, the non-oxidized substance abrasive material of 20%-40%, 3%～8% wedding agent;
B is pressed into the product of desired size then with the above batching 8～15min that mixes;
C is dried product under 180 ± 5 ℃ temperature condition,
D cools off after the product of drying is flooded in pitch,
E carries out calcination process with cooled product at last.
Above-described carbon materials is one or more in electrode particle, graphite, silit, the pitch, and its granularity is the 4-200 order; Described ultra-fine carbon materials is one or more in carbon black, graphite, the pitch, and its granularity is the 400-1000 order; Described oxidation inhibitor is one or more in Pure Silicon Metal, silit, norbide, the silicon nitride, and its granularity is the 200-325 order; Described non-oxidized substance abrasive material is one or more in silit, silicon nitride, the SP 1, and its granularity is the 200-325 order; Described wedding agent is one or more in resol, Sodium hexametaphosphate 99, CMC 99.5, calcium lignin sulphonate, water glass, the lignosulfite.
Advantage of the present invention and positively effect are:
1) the present invention can decompose production, and combination is used, and makes to produce and use all to become to be easy to;
2) product price of the present invention is cheap, has only 1/8th of import refractory materials of same type price;
3) product strength of the present invention is high, and erosion resistibility is strong, and performance is good,
4) long product lifecycle of the present invention.
Embodiment
Below in conjunction with embodiment and effect technical scheme of the present invention is described in detail:
The invention discloses two kinds of technical solutions, a kind of is refractory material of carbon protective sleeve, and a kind of is the preparation method of refractory material of carbon protective sleeve.This material comprises following component by percentage to the quality: 40%-60% carbon materials, its granularity are the 4-200 order; The ultra-fine carbon materials of 2-10%, its granularity are the 400-1000 order; The oxidation inhibitor of 2-5%, the non-oxidized substance abrasive material of 20%-40% and 3～8% wedding agent.
The present invention adopts following steps to prepare above-mentioned refractory materials:
A selects the 40%-60% carbon materials by percentage to the quality for use, the ultra-fine carbon materials of 2-10%, and the oxidation inhibitor of 2-5%, the non-oxidized substance abrasive material of 20%-40%, and 3～8% wedding agent carries out proportioning;
B carries out mixing of 8～15min with above batching with the high speed mixing pan or mixes, and is pressed into the product of desired size then with 315 tons friction press;
With the product oven dry, drying time is within 24h under 180 ± 5 ℃ temperature condition for c;
D adopts pressure with the product of oven dry in the vacuum intruded pitch system be that the high pressure pitch of 0.2-0.8MPa floods, and then cools off;
E carries out roasting with cooled product at last in roasting kiln, its maturing temperature is 500-800 ℃, and roasting time is 4-10hrs.Described roasting is a subzero treatment, and its effect is the remaining pitch of ablation product surface, makes its inner network structure that forms carbon, can increase substantially the intensity of product.
Carbon materials described in refractory materials of the present invention and the preparation method is one or more in electrode particle, graphite, silit, the pitch, and its granularity is that granularity is the 4-200 order; Described ultra-fine carbon materials is the product of organic substance incomplete combustion or decomposes, and its particle is thin, and adsorptivity is strong, and ultra-fine carbon materials is one or more in carbon black, graphite, the pitch, and its granularity is that granularity is the 400-1000 order; Described oxidation inhibitor is one or more in Pure Silicon Metal, silit, norbide, the silicon nitride; Described non-oxidized substance abrasive material is one or more in silit, silicon nitride, the SP 1; Described wedding agent is one or more in resol, Sodium hexametaphosphate 99, CMC 99.5, calcium lignin sulphonate, water glass, the lignosulfite.
Though electrode particle used in the present invention, graphite, carbon black, pitch etc. all belong to carbon materials, because of particle size differences is bigger, effect also differs widely during use.As being skeleton with the electrode particle, fine powder and super-fine powder rise fills and crosslinked action; Pure Silicon Metal, silit, norbide etc. add in refractory materials on a small quantity, mainly act as inhibitor; Silit, silicon nitride, SP 1 etc. are the non-oxidized substance abrasive material, and its major function is intensity and the toughness that increases refractory materials.
Goods of the present invention are internal diameter 300-500mm, and the class annulus of external diameter 600-700mm like direct production easy-formation not, in transportation, also difficulty when installing, so can decompose production, is combined into type during use.
On behalf of it, composition that the present invention does not use in following examples or element to implement, and following examples only are the preferred embodiment of the invention, adopts all the components of the present invention or element all can reach invention effect of the present invention.
The present invention is employed carbon materials composition such as table 1 in practical implementation:
Table 1 carbon materials composition
| Material | F.C％ | SiC％ | Fe 2O 3％ | Fugitive constituent % | Moisture content % |
| Electrode particle | ≥95 | ||||
| Silit | ≤0.3 | ≥95 | ≤1 | ||
| Pitch | ≥50 | ||||
| L-190 graphite | ≥90 | ≤2 | ≤1 | ||
| L-195 graphite | ≥95 | ≤1.5 | ≤0.8 | ||
| L-198 graphite | ≥98 | ≤1.0 | ≤0.6 |
Embodiment 1
Employed carbon materials composition is seen table 2 among the embodiment 1:
Table 2 carbon materials composition
| Material | F.C％ | SiC％ | Fe 2O 3％ | Fugitive constituent % | Moisture content % |
| Electrode particle | ≥95 | ||||
| Silit | ≤0.3 | ≥95 | ≤1 | ||
| L-198 graphite | ≥98 | ≤1.0 | ≤0.6 |
Be 100 purpose electrode particles 40% with table 2 granularity earlier, L-198 graphite 5%, silit 10% mixes by proportioning; Adding granularity again is ultra-fine carbon materials carbon black 2% of 400 purposes and ultra-fine carbon materials graphite 3%; Add granularity and be 200 purpose oxidation inhibitor Pure Silicon Metals 1%, silit 1%, silicon nitride 1%; Add 325 purpose non-oxidized substance abrasive materials, i.e. silit 15%, SP 1 12%; The wedding agent that then adds resol 3%, calcium lignin sulphonate 3%; The component that above proportioning is the good 15min discharging of on the high speed mixing pan, mixing is pressed into the product of (confirming corresponding product size according to user's working conditions) with 315 tons of friction presses, under 180 ± 5 ℃ temperature condition, carries out the oven dry of 24h; Then the product of drying being adopted pressure in the vacuum intruded pitch system is the high pressure bituminizing of 0.5Mpa; With in roasting kiln, carrying out roasting again after the cooling of the product behind the dipping, maturing temperature is 500 ℃, and roasting time is 10hrs.
The carbon protective sleeve material of present embodiment 1 is applied on the vacuum-casting mould of China heavy-duty machinery group company, and the casting amount of product exceeds 20% than with high alumina quality guarantee protecting pipe, and cost is merely 1/8th of existing import like product, and result of use is fine.
Embodiment 2
Employed carbon materials composition is seen table 3 among the embodiment 2:
Table 3 carbon materials composition
| Material | F.C％ | SiC％ | Fe 2O 3％ | Fugitive constituent % | Moisture content % |
| Electrode particle | ≥95 | ||||
| Silit | ≤0.3 | ≥95 | ≤1 | ||
| Pitch | ≥50 | ||||
| L-195 graphite | ≥95 | ≤1.5 | ≤0.8 | ||
| L-198 graphite | ≥98 | ≤1.0 | ≤0.6 |
With the granularity of table 3 is 200 purpose carbon materials electrode particles 45%, L-195 graphite 2%, and L-198 graphite 2%, silit 5%, pitch 3% mixes by proportioning; Adding granularity again is ultra-fine carbon materials carbon black 2% of 700 purposes and pitch 5%; Adding granularity is 250 purpose oxidation inhibitors, and promptly silit 2%, norbide 3%; Add 200 purpose non-oxidized substance abrasive materials, i.e. silit 5%, silicon nitride 10% SP 1 10%; Then add resol 2%, 2% water glass as wedding agent; The component that above proportioning is the good 8min discharging of on the high speed mixing pan, mixing is pressed into the product of (confirming corresponding product size according to user's working conditions) with 315 tons of friction presses, under 180 ± 5 ℃ temperature condition, carries out the oven dry of 24h; Then the product of drying being adopted pressure in the vacuum intruded pitch system is the high pressure bituminizing of 0.8Mpa; With its cooling after again with product at the roasting roasting in kilns, its maturing temperature is 800 ℃, roasting time is 4hrs.
The carbon protective sleeve material of present embodiment 2 is applied on the ingot mould of China heavy-duty machinery group company; The casting amount of product exceeds 20% than with the graphite protective casing; Cost declines to a great extent, and telescopic is more than a times of prior art work-ing life, and is functional.
Embodiment 3
Employed carbon materials composition sees the following form 4 among the embodiment 3:
Table 4 carbon materials composition
| Material | F.C％ | SiC％ | Fe 2O 3％ | Fugitive constituent % | Moisture content % |
| Electrode particle | ≥95 | ||||
| Silit | ≤0.3 | ≥95 | ≤1 | ||
| L-190 graphite | ≥90 | ≤2 | ≤1 | ||
| L-198 graphite | ≥98 | ≤1.0 | ≤0.6 |
With the granularity of table 4 is 50 purpose carbon materials electrode particles 40%, L-198 graphite 3%, and silit 3% mixes by proportioning; Adding granularity again is ultra-fine carbon materials carbon black 5% of 900 purposes and ultra-fine carbon materials graphite 5%; Adding granularity is 325 purpose oxidation inhibitors, i.e. Pure Silicon Metal 2%, silit 1%, norbide 1%; Add 250 purpose non-oxidized substance abrasive materials, promptly silit 10%, silicon nitride 10%, SP 1 10%; Add resol 2%, calcium lignin sulphonate 3%, water glass 2% is as wedding agent; The component that above proportioning is the good 12min discharging of on the high speed mixing pan, mixing is pressed into the product of (confirming corresponding product size according to user's working conditions) with 315 tons of friction presses, under 180 ± 5 ℃ temperature condition, about 24h, dries; Then the product of drying being adopted pressure in the vacuum intruded pitch system is the high pressure bituminizing of 0.3Mpa; With its cooling after again with product at the roasting roasting in kilns, its maturing temperature is 650 ℃, roasting time is 7hrs.
The carbon protective sleeve of present embodiment 3 is applied on the ingot mould of China foundry, and the casting amount of product exceeds 20% than with graphite or high alumina quality guarantee protecting pipe, and surperficial erosion resistibility is strong, and intensity is apparently higher than prior art, and use properties is good.
Adopt technique scheme, the product of being developed detects physical and chemical index and compares with the physical and chemical index that has domestic and international protective casing now, and the result sees table 5.
The physical and chemical index contrast of table 5 the present invention and prior art
| The trade mark | Void content % | Volume density g/cm 3 | Compressive strength Mpa | Fe 2O 3％ | F.C％ | SiC+Si％ |
| The present invention | 19.5 | 1.85 | 15.2 | 1.8 | 66.2 | 24.2 |
| Prior art 123 (import) | ?23.6 26.4 21.3 | ?1.76 1.62 1.82 | ?9.3 6.4 12.3 | ?2.4 3.0 2.1 | ?63.1 59.8 65.7 | ?22.6 20.8 23.9 |
Can find out by table 5, the carbon protective sleeve that the present invention develops with compare with imported product with the prior art of class that void content is low, volume density is big, compressive strength is high; Carbon content is high, silicon content is high and Fe
2O
3Content is low.The refractory materials that this product can be used as the vacuum-casting protective casing fully uses, and preparation cost is cheap.
For the carbon protective sleeve of investigating the present invention preparation feasibility, specially produced a lot sample piece with the preparation method and on the vacuum oven of China heavy-duty machinery enterprise, tried out according to the component of the invention described above as vacuum-casting protective tube refractory materials.In use the casting amount of test products of the present invention goes out 20% than prior art high alumina matter and graphite matter telescopic imported product are taller; It is functional to use the result to show with the carbon protective sleeve of the present invention's preparation; Production efficiency is high; Prolonged the work-ing life of ingot casting protective casing, reduced the consumption and the production cost of refractory materials, can be used to substitute high alumina matter or graphite matter product fully.
Claims (3)
1. refractory material of carbon protective sleeve; It is characterized in that comprising by percentage to the quality the carbon materials of following component: 40%-60%, the ultra-fine carbon materials of 2%-10%, the oxidation inhibitor of 2%-5%; The non-oxidized substance abrasive material of 20%-40%, 3%～8% wedding agent;
Wherein, described ultra-fine carbon materials is one or more in carbon black, graphite, the pitch, and its granularity is the 400-1000 order; Described oxidation inhibitor is one or more in Pure Silicon Metal, silit, norbide, the silicon nitride; Its granularity is the 200-325 order; Described non-oxidized substance abrasive material is one or more in silit, silicon nitride, the SP 1; Its granularity is the 200-325 order; Described wedding agent is one or more in resol, Sodium hexametaphosphate 99, CMC 99.5, calcium lignin sulphonate, water glass, the lignosulfite; Described carbon materials is one or more in electrode particle, graphite, the pitch, and its granularity is the 4-200 order.
2. the preparation method of a refractory material of carbon protective sleeve according to claim 1 is characterized in that adopting following steps to prepare:
A selects for use following component to carry out the carbon materials of proportioning: 40%-60%, the ultra-fine carbon materials of 2%-10%, the oxidation inhibitor of 2%-5%, the non-oxidized substance abrasive material of 20%-40%, 3%～8% wedding agent by percentage to the quality;
B is pressed into the product of desired size then with the above batching 8～15min that mixes;
C is dried product under 180 ± 5 ℃ temperature condition;
D cools off after the product of drying is flooded in pitch;
E carries out calcination process with cooled product at roasting kiln at last, and maturing temperature is 500-800 ℃, and roasting time is 4-10hrs.
3. the preparation method of refractory material of carbon protective sleeve according to claim 2 is characterized in that adopting the high pressure bituminizing, and high pressure is 0.2-0.8MPa.
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| CN102212844B (en) * | 2010-04-07 | 2014-10-01 | 中钢集团耐火材料有限公司 | Carbon metal compound composite material |
| CN101935230B (en) * | 2010-08-27 | 2013-01-30 | 南通京通石墨设备有限公司 | Method for producing machining type impregnated graphite tube |
| CN102527953A (en) * | 2012-01-20 | 2012-07-04 | 吴绍相 | Explosion prevention water-cooling ingot mould |
| CN104002460A (en) * | 2014-05-13 | 2014-08-27 | 龚孝祥 | Graphite pipe manufacturing method for eliminating extruding internal stress and microcracks |
| CN106810274A (en) * | 2015-12-01 | 2017-06-09 | 镇江市润州金山金属粉末厂 | A kind of carbon zinc refractory material |
| CN105924171B (en) * | 2016-03-30 | 2018-09-18 | 常州英诺新材料有限公司 | Protection sleeve pipe and preparation method thereof both with a kind of corrosion of resistance to oxidation and thermal shock resistance |
| CN106986646A (en) * | 2017-04-12 | 2017-07-28 | 郑州嵩山硼业科技有限公司 | A kind of oxidation-resistant graphite electrode |
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| CN101429038A (en) * | 2007-11-07 | 2009-05-13 | 鞍钢集团耐火材料公司 | Charge mode of resin combining with carbonaceous refractory material |
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