CN1583668A - Graphite sleeves of rollers at furnace bottom and their dipping process and special apparatus thereof - Google Patents
Graphite sleeves of rollers at furnace bottom and their dipping process and special apparatus thereof Download PDFInfo
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- CN1583668A CN1583668A CN 200410024261 CN200410024261A CN1583668A CN 1583668 A CN1583668 A CN 1583668A CN 200410024261 CN200410024261 CN 200410024261 CN 200410024261 A CN200410024261 A CN 200410024261A CN 1583668 A CN1583668 A CN 1583668A
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Abstract
A graphite carbon sleeve of the roller at furnace bearth is prepared from calcined coke powder, adhesive, and additional coke through proportional mixing, kneading, die pressing, calcining, high-pressure dipping in metallic phosphate solution, graphitizing machining for shaping, chemical treating and high-temp treating. Its dipping method and dedicated apparatus are also disclosed.
Description
Described technical field:
The invention belongs to special high-temperature refractory, particularly be to be used for type furnace bottom roll graphite carbon sleeve and dip treating method and the specific equipment that the siliconized plate heat treatment furnace is used.
Background technology:
Siliconized plate thermal treatment soaking pit furnace bottom carrying roller is divided from making the material aspect, metallic roll is arranged, make pottery and support roller and graphite roller.Metallic roll high temperature steel manufacturing, its maximum problem is yielding and easy dross, makes siliconized plate be difficult for flattening and easily siliconized plate being pressed against wound, thereby reduces the quality of siliconized plate greatly, so metallic roll is eliminated in siliconized plate heat treatment furnace soaking zone.The pottery roller is except also easily taking place the above-mentioned dross phenomenon, in case and dross just can't eliminate by grinding roller (motion that stops siliconized plate allowing carrying roller rotation).This because of " tumor " little graphite roller on ceramic roller owing to its good thermotolerance, self lubricity and suitable hardness are widely used.It is poor that but the weakness that graphite roller is fatal is an antioxidant property, particularly extremely short work-ing life in the high-temperature zone more than 920 ℃, and what influence was produced normally carries out, and production cost also is difficult to bear, and is exactly the key point of dealing with problems so improve the antioxidant property of graphite roller.The our factory is in ZL94110738.8 furnace bottom roll graphite carbon sleeve and dip treating method and specific equipment and two patents of ZL94241025.4 of application in 1994 and mandate.Respond well according to furnace bottom roll graphite carbon sleeve cold zone in siliconized plate thermal treatment that this technology is produced, replacing whole import already.
The dip treating graphite carbon sleeve why can high its antioxygen property be because: metal oxide, nonmetal oxide, chromic acid itself is not oxidized or be difficult for oxidation, they can fill pore well, barrier gas passes through, so just can prevent the erosion of gas effectively to graphite matrix, thereby reach the purpose that improves the graphite carbon sleeve antioxidant property, and then the work-ing life of having improved graphite carbon sleeve greatly.But the graphite carbon sleeve through above-mentioned processing still can not use under the temperature more than 920 ℃, can not satisfy the needs that improve the siliconized plate class, this be because above-mentioned mineral compound have under so high temperature, itself just and matrix graphite generation chemical reaction, as chromic anhydride.The furnace bottom roll China ink carbon cover base substrate that utilizes ZL94110738.8 invention to produce in addition, the size of void content height and pore and skewness cause the dross of siliconized plate easily in the process of using, reduce the commercial value of siliconized plate.Particularly along with the further raising of siliconized plate linear velocity in stove, the wear resisting property of the graphite furnace bottom roller that above-mentioned technology is produced has been difficult to adapt to new requirement.
Summary of the invention:
The purpose of this invention is to provide a kind of deficiency that overcomes currently available products of on the basis of above-mentioned prior art, developing, obtain high-quality both high temperature resistant, resistive connection knurl, attrition resistant again furnace bottom roll graphite carbon sleeve and dip treating method and specific equipment.
The object of the present invention is achieved like this: specify as follows:
A kind of furnace bottom roll graphite carbon sleeve, by calcining coke powder, wedding agent, adding the raw material that burnt material is formed, through batching, mix pinch, die mould, roasting, high-pressure impregnation, greying, machining moulding, chemical impregnation are handled, the pyroprocessing series of processes is finished, it is characterized in that: described raw material is formed and is by weight percentage:
With the calcining coke powder is major ingredient, and varigrained content respectively is: that 0.5mm is following is 40-70%, and that 0.5-0.8mm is 20-55%, 0.8-1mm be 0.5-5%, described wedding agent pitch is 18-23%, and described additional burnt material is needle coke, and content is 20-30%.
Above-mentioned furnace bottom roll graphite carbon sleeve is characterized in that the composition of described raw material is by weight percentage:
The burnt 0-0.5mm's of calcination is 57%, and 0.5-0.8mm's is 22%, and 0.8-1mm's is 1%, and mid-temperature pitch is 20% as wedding agent, and needle coke is 30%.
The dip treating method of above-mentioned furnace bottom roll graphite carbon sleeve is, select analytical pure aluminium dihydrogen phosphate or primary magnesium phosphate or their combination for use, be dissolved in pure water and make the solution of 45-60% mass percent concentration, again the furnace bottom roll graphite carbon sleeve is placed impregnating autoclave, be evacuated down to-0.095MPa, the above-mentioned solution for preparing is injected jar, be pressurized to 0.6MPa and pressurize 2-3 hour again, from impregnating autoclave, take out graphite carbon sleeve then, handle through the oven dry of normal temperature to 250 ℃ again, promptly finish phosphatic chemical impregnation process.
Above-mentioned furnace bottom roll graphite carbon sleeve dedicated treatment facility is made up of power distribution cabinet, circulation water tower, vacuum pump, vacuum resistance furnace, is characterized in that the vacuum resistance body of heater is made of furnace wall layer, burner hearth, product frame, heating unit, pipeline, test chart; The furnace wall layer is made up of furnace shell and flue sealing, establishes lightweight thermal insulation layer, insulating brick-layer, heating unit layer between its furnace shell sidewall and the flue successively; Upwards establish insulating brick backing layer at the bottom of the furnace shell and between the flue successively; Seal by tight lid screw between bell and furnace wall layer are suitable for reading; The water pump and the water pipe that set out air valve, vacuum meter, vertical thermoelectric corner, tensimeter on the bell respectively and be communicated with the circulation water tower; The thermoelectric corner of level is located at respectively in the layer sidewall of furnace wall; Establish the product frame between the inboard wall of furnace in the burner hearth, product furnace bottom roll graphite carbon sleeve lower end places on the product base, and its top is fixed on the product frame.
Advantage of the present invention is clearly:
The blank that above-mentioned raw materials and ratio are produced, Key Quality Indicator is as follows:
| Resistivity (ц Ω m) | Folding strength (MPa) | Body close (g/cm) | Ash content (%) | Iron content (ppm) | Calcic (ppm) | Apparent pore (%) |
| ≤7.5 | ≥22 | ≥1.75 | ≤0.3 | ≤200 | ≤250 | ≤15 |
The furnace bottom roll graphite carbon sleeve blank of producing after the last adjustment proportioning raw materials, volume density is big, and resistivity reduces, pore is little and be evenly distributed, and the particularly reduction of iron calcium constituent improves the antioxidant property of graphite carbon sleeve greatly; The selected soaker of chemical treatment is metal phosphate, as aluminium dihydrogen phosphate, primary magnesium phosphate etc.; Metal phosphate at high temperature changes into a metaphosphate that is tied to, pyrophosphate salt etc., and they can also form one deck viscosity protective membrane at matrix pore inwall when stopping up graphite carbon sleeve matrix pore, with O
2-H
2Reactant gasess such as O and matrix graphite separate, thereby reach the purpose of antioxidant property, make the use temperature of graphite carbon sleeve bring up to 1050 ℃.The height of handling with chromic acid through the hardness ratio of parkerized graphite carbon sleeve, thereby wear resisting property improves greatly, satisfied the needs of siliconized plate heat treatment furnace high-temperature section; The prescription of above-mentioned furnace bottom roll graphite carbon sleeve, iron level reduce to that 200ppm is following, calcium contents reduces to that 250ppm is following, the high-temperature processing technology behind selected soaker metal phosphate and the dipping is an inventive point of the present invention.
Description of drawings:
Accompanying drawing 1 is specific equipment diagrammatic cross-section of the present invention.
Among the figure: the 1st, power distribution cabinet, the 2nd, tightly cover screw, the 3rd, air outlet valve; the 4th, vacuum meter, the 5th, vertical thermoelectric every, the 6th, tensimeter; the 7th, air outlet valve, the 8th, bell, the 9th, shielding gas valve; the 10th, water pump, the 11st, vacuum valve, the 12nd, circulation water tower; the 13rd, vacuum pump, the 14th, product frame, the 15th, product; the 16th, flue, the 17th, insulating brick, the 18th, product base; the 19th, insulating brick backing, the 20th, pipeline, the 21st, stove leg; the 22nd, lightweight thermal insulation layer, the 23rd, furnace shell, the 24th, heating unit; the 25th, level thermoelectricity every, the 26th, supply lead, the 27th, the hole wall; the 28th, Horizon, the 29th, burner hearth, 30 is fan.
Can be found out by accompanying drawing: vacuum resistance furnace is made up of power distribution cabinet 1, circulation water tower 12, vacuum pump 13, vacuum resistance body of heater, is characterized in that the vacuum resistance body of heater is made of furnace wall layer, burner hearth, product frame, Heating element, pipeline, various test chart; The furnace wall layer is made up of furnace shell 23 and flue 16 sealings, establishes lightweight thermal insulation layer 22, insulating brick-layer 17, heating unit layer 24 successively between its furnace shell 23 sidewalls and the flue 16; Establish insulating brick backing layer 19 between furnace shell 23 diapires and flue 16 bottoms; Seal by tight lid screw 2 between bell 8 and furnace shell 23 and the flue 16 upper end sealing ends; Set out air valve 3, vacuum meter 4, vertical thermoelectric corner 5, tensimeter 6 on the bell respectively; The water pump 10 that circulation water tower 12 is communicated with is communicated with water cavity right-hand member in the bell 8 by water inlet pipe, and the water cavity left end is communicated with rising pipe in the bell 8, and rising pipe connects and is communicated with circulation water tower 12 again, forms the loop; The thermoelectric corner 25 of level is located at respectively in the layer sidewall of furnace wall; Pipeline 20 lower ends are passed layer bottom, furnace wall and are communicated with burner hearth 29, and its upper end is communicated with the control air-flow by vacuum valve 11 with vacuum pump 13, and shielding gas is by shielding gas valve 9 turnover burner hearths 29; Flue 16 inwalls in the burner hearth 29 are established product frame 14, and product furnace bottom roll graphite carbon sleeve lower end places on the product base 18, and its top is fixed on the product frame 14.Stove integral body is supported by stove leg 21.The shaft extension that is fixed on the motor of bell top is gone in the burner hearth 29, and the end establishes fan 30, plays temperature in the adjustment burner hearth 29.
Embodiment:
The Production Flow Chart of furnace bottom roll graphite carbon sleeve is:
(1) at first produces the furnace bottom roll graphite carbon sleeve: raw material is mediated evenly back extrusion molding on 2500 tons of extrusion machines by prescription; Again through roasting, dipping, roasting again, again dipping, again after the roasting, promptly get furnace bottom roll graphite carbon sleeve blank, machining moulding by drawing through 2600-2800 ℃ of greying;
(2) chemical treatment dipping and pyroprocessing: 1. the analytical pure metal phosphate is dissolved in pure water by 40%-60% concentration; 2. the furnace bottom roll graphite carbon sleeve that processes is put in the special-purpose dip treating jar; 3. do first vacuum (vacuum tightness reaches-0.095Mpa); 4. pressurization (pressure reaches 0.6Mpa) dip treating after; 5. again through air-dry; 6. oven dry (normal temperature-250 ℃); 7. pyroprocessing (normal temperature-950 ℃) and 8. the polishing fluting be finished product furnace bottom roll graphite carbon sleeve.Wherein high-temperature process is: will flood furnace bottom roll graphite carbon sleeve after metal phosphate and the drying and pack in the vacuum resistance furnace; under nitrogen or argon shield, begin progressively to be warmed up to stage by stage 950 ℃ from normal temperature; be incubated 2-3 hour, cool to normal temperature then naturally and come out of the stove.
Blank processing formula for raw stock and embodiment:
| Calcined coke granularity (mm) | 0-0.5 | 0.5-0.8 | 0.8-1 | Pitch | Needle coke |
| Shared weight (%) | 57 | 22 | 1 | 20 | 30 |
Embodiment 1: will be processed into the furnace bottom roll graphite carbon sleeve by the base substrate of above-mentioned formula for raw stock production, put into impregnating autoclave, be evacuated down to-0.095Mpa, the phosphate dihydrogen aluminum solution of implantation quality percentage concentration 50% then, be pressurized to 0.6Mpa, pressurize was taken out after 2 hours, through air-dry and 230 ℃ of oven dry, through 950 ℃ of pyroprocessing, the polishing fluting is a finished product bottom roller graphite carbon sleeve again.
Embodiment 2: base substrate is identical with embodiment 1, and dipping, air-dry, oven dry and high-temperature processing technology are also identical, and changing dipping solution into mass percent concentration is 50% biphosphate magnesium solution.
Embodiment 3: base substrate is identical with embodiment 1, and dipping, air-dry, oven dry and high-temperature processing technology are also identical, dipping solution is changed into the mixed solution of the biphosphate magnesium solution of mass percent concentration 50% phosphate dihydrogen aluminum solution and mass percent concentration 50%.
Embodiment 4: the raw material of above-mentioned furnace bottom graphite carbon sleeve is formed best proportioning and is by weight percentage:
57% of calcined coke 0-0.5mm, 22% of 0.5-0.8mm, 1% of 0.8-1mm, mid-temperature pitch is made wedding agent, accounts for 20%, 30% needle coke and sneaks into by above-mentioned three kinds of size compositions.
Further specify effect of the present invention:
Below be this embodiment and comparing result and explanation (real stove use, the atmosphere N of comparative example
2-N
2-N
2O, 1050 ℃ of temperature)
| Numbering | Chemical treatment type | Duration of service | Situation after the use |
| Comparative example 1 | Do not have | 7 days | Oxidation is serious, and is loose porous, can not use again |
| Comparative example 2 | Do not have | 9 days | One end oxidation is serious, can not use again |
| Comparative example 3 | Chromic acid | 6 hours | Severe oxidation, efflorescence can not be used again |
| Comparative example 4 | Chromic acid | 6 hours | The same |
| Comparative example 5 | Phosphoric acid salt | 60 days | Slight oxidation can re-use |
| Comparative example 6 | Phosphoric acid salt | 65 days | Slight oxidation has the cut at a place 5, can not re-use. |
As can be seen from the above table, the graphite carbon sleeve that does not flood and flooded chromic acid can not use under 1050 ℃ temperature at all, particularly flooded the chromic acid graphite carbon sleeve, not only do not improve its antioxidant property and quickened oxidation on the contrary, and flooded phosphatic graphite carbon sleeve, prolong work-ing life greatly, can keep a normal turnaround, reaches service requirements.
Claims (10)
1, a kind of furnace bottom roll graphite carbon sleeve, by the calcining coke powder, wedding agent, the raw material that additional burnt material is formed, through batching, mix and pinch, die mould, roasting, high-pressure impregnation, greying, the machining moulding, chemical treatment, the pyroprocessing operation forms, it is characterized in that: described raw material composition is by weight percentage: with the calcining coke powder is major ingredient, varigrained content respectively is: that 0.5mm is following is 40-70%, 0.5-0.8mm account for 20-55%, 0.8-1mm account for 0.5-5%, described wedding agent pitch accounts for 18-23%, above-mentioned additional burnt material is needle coke, and its content accounts for 20-30%.
2, furnace bottom roll graphite carbon sleeve according to claim 1 is characterized in that the composition of described raw material is by weight percentage:
57% of the burnt 0-0.5mm of calcination, 22% of 0.5-0.8mm, 1% of 0.8-1mm, mid-temperature pitch accounts for 20% as wedding agent, and needle coke accounts for 30%.
3, a kind of dip treating method of furnace bottom roll graphite carbon sleeve according to claim 1, it is characterized in that: select the analytical pure aluminium dihydrogen phosphate for use, be dissolved in pure water and make the solution of 45-60% mass percent concentration, again the furnace bottom roll graphite carbon sleeve is placed impregnating autoclave, be evacuated down to-0.095Mpa, the above-mentioned solution for preparing is injected jar, be pressurized to 0.6Mpa and pressurize 2-3 hour again, from impregnating autoclave, take out graphite carbon sleeve then, handle through the oven dry of normal temperature to 250 ℃ again, promptly finish phosphatic chemical impregnation process.
4, the dip treating method of furnace bottom roll graphite carbon sleeve according to claim 3, it is characterized in that: select the analytical pure primary magnesium phosphate for use, be dissolved in pure water and make the solution of 45-60% mass percent concentration, again the furnace bottom roll graphite carbon sleeve is placed impregnating autoclave, be evacuated down to-0.095Mpa, the above-mentioned solution for preparing is injected jar, be pressurized to 0.6Mpa and pressurize 2-3 hour again, from impregnating autoclave, take out graphite carbon sleeve then, handle through the oven dry of normal temperature to 250 ℃ again, promptly finish phosphatic chemical impregnation process.
5, the dip treating method of furnace bottom roll graphite carbon sleeve according to claim 3, it is characterized in that: the composition of selecting analytical pure aluminium dihydrogen phosphate and primary magnesium phosphate for use, be dissolved in pure water and make the solution of 45-60% mass percent concentration, again the furnace bottom roll graphite carbon sleeve is placed impregnating autoclave, be evacuated down to-0.095Mpa, the above-mentioned solution for preparing is injected jar, be pressurized to 0.6Mpa and pressurize 2-3 hour again, from impregnating autoclave, take out graphite carbon sleeve then, handle through the oven dry of normal temperature to 250 ℃ again, promptly finish phosphatic chemical impregnation process.
6, a kind of specific equipment according to the described furnace bottom roll graphite carbon sleeve of claim 1, form by power distribution cabinet, circulation water tower, vacuum pump, vacuum resistance body of heater, it is characterized in that: the furnace wall furnace bottom layer of vacuum resistance furnace is made up of furnace shell and flue sealing, establishes lightweight thermal insulation layer, insulating brick-layer, heating unit layer in the chamber of its furnace shell sidewall and flue sidewall successively; Establish insulating brick backing layer at the bottom of the furnace shell and between at the bottom of the flue; Between bell and the upper port after fixedlying connected in furnace wall and flue by tight lid screw closed and butted; Thermoelectric corner of each level and heavy directly-heated electricity corner one end insert in the furnace shell sidewall respectively and bell in lagging material in, its other end all with power distribution cabinet in the circuit electrical coupling.
7, according to the processing specific equipment of the described furnace bottom roll graphite carbon sleeve of claim 6, it is characterized in that: in the vacuum resistance furnace, be respectively equipped with air valve, vacuum meter, tensimeter on the bell.
8, according to the processing specific equipment of the described furnace bottom roll graphite carbon sleeve of claim 6, it is characterized in that: establish the product frame between the inboard wall of furnace in the burner hearth in the vacuum resistance furnace, product furnace bottom roll graphite carbon sleeve lower end places on the product base, and its top is fixed on the product frame.
9, according to the processing specific equipment of the described furnace bottom roll graphite carbon sleeve of claim 6, it is characterized in that: the circulation water tower by water pump, water pipe, bell water cavity,, return water pipe communication loop water tower, constitute circulation.
10, according to the processing specific equipment of the described furnace bottom roll graphite carbon sleeve of claim 6, it is characterized in that: vacuum pump communicates with burner hearth by gas pipeline, and shielding gas can add or discharge by the shielding gas valve; Motor shaft on the bell stretches on the lower end in the burner hearth and adorns ceiling fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100242613A CN100425571C (en) | 2004-06-10 | 2004-06-10 | Graphite sleeves of rollers at furnace bottom and their dipping process and special apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100242613A CN100425571C (en) | 2004-06-10 | 2004-06-10 | Graphite sleeves of rollers at furnace bottom and their dipping process and special apparatus thereof |
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| CN1583668A true CN1583668A (en) | 2005-02-23 |
| CN100425571C CN100425571C (en) | 2008-10-15 |
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|---|---|---|---|
| CNB2004100242613A Expired - Fee Related CN100425571C (en) | 2004-06-10 | 2004-06-10 | Graphite sleeves of rollers at furnace bottom and their dipping process and special apparatus thereof |
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| CN101342990B (en) * | 2007-07-11 | 2011-01-26 | 焦作市中州炭素有限责任公司 | Process for manufacturing hollow plumbago support roller sleeve |
| CN102173863A (en) * | 2010-12-31 | 2011-09-07 | 中国科学院过程工程研究所 | Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution |
| CN101768002B (en) * | 2009-12-29 | 2012-07-25 | 武汉科技大学 | Durable silicon steel furnace bottom roller sleeve and preparation method thereof |
| CN101817687B (en) * | 2009-12-29 | 2012-09-19 | 武汉科技大学 | Silicon steel hearth roll sleeve and preparation method thereof |
| CN102776347A (en) * | 2011-05-10 | 2012-11-14 | 鞍钢股份有限公司 | On-line roll grinding method for carbon jacket hearth roll |
| CN102776351A (en) * | 2011-05-10 | 2012-11-14 | 鞍钢股份有限公司 | Two-stage treating method for accretion in carbon jacket hearth roll of continuous annealing furnace |
| CN102910909A (en) * | 2012-10-19 | 2013-02-06 | 辽宁辽洛科技发展有限公司 | Graphite carbon cover and antioxidation dipping treatment method thereof |
| CN101696121B (en) * | 2009-10-26 | 2013-02-13 | 大连精艺碳素有限公司 | High-temperature graphite carbon bush and production method |
| CN103322824A (en) * | 2012-03-22 | 2013-09-25 | 宝山钢铁股份有限公司 | Treating method of furnace roller nodule |
| CN103820627A (en) * | 2014-01-02 | 2014-05-28 | 中国平煤神马集团开封炭素有限公司 | Graphitic carbon sleeve production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57140377A (en) * | 1981-02-25 | 1982-08-30 | Kawasaki Steel Co | Graphitic carbon material for heat treatment furnace hearth roll |
| CN2199206Y (en) * | 1994-07-29 | 1995-05-31 | 山东省生建八三厂特种耐火材料厂 | Graphitic carbon sleeve metal infiltrating treating equipment |
| CN1056193C (en) * | 1994-08-22 | 2000-09-06 | 山东省生建八三厂特种耐火材料厂 | Graphite sleeve of furnace bed roller and metal infiltration method, and special equipment for it |
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2004
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| CN101342990B (en) * | 2007-07-11 | 2011-01-26 | 焦作市中州炭素有限责任公司 | Process for manufacturing hollow plumbago support roller sleeve |
| CN101696121B (en) * | 2009-10-26 | 2013-02-13 | 大连精艺碳素有限公司 | High-temperature graphite carbon bush and production method |
| CN101768002B (en) * | 2009-12-29 | 2012-07-25 | 武汉科技大学 | Durable silicon steel furnace bottom roller sleeve and preparation method thereof |
| CN101817687B (en) * | 2009-12-29 | 2012-09-19 | 武汉科技大学 | Silicon steel hearth roll sleeve and preparation method thereof |
| CN102173863A (en) * | 2010-12-31 | 2011-09-07 | 中国科学院过程工程研究所 | Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution |
| CN102173863B (en) * | 2010-12-31 | 2015-02-18 | 中国科学院过程工程研究所 | Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution |
| CN102776347B (en) * | 2011-05-10 | 2014-03-12 | 鞍钢股份有限公司 | On-line roll grinding method for carbon jacket hearth roll |
| CN102776347A (en) * | 2011-05-10 | 2012-11-14 | 鞍钢股份有限公司 | On-line roll grinding method for carbon jacket hearth roll |
| CN102776351A (en) * | 2011-05-10 | 2012-11-14 | 鞍钢股份有限公司 | Two-stage treating method for accretion in carbon jacket hearth roll of continuous annealing furnace |
| CN103322824A (en) * | 2012-03-22 | 2013-09-25 | 宝山钢铁股份有限公司 | Treating method of furnace roller nodule |
| CN103322824B (en) * | 2012-03-22 | 2015-06-17 | 宝山钢铁股份有限公司 | Treating method of furnace roller nodule |
| CN102910909A (en) * | 2012-10-19 | 2013-02-06 | 辽宁辽洛科技发展有限公司 | Graphite carbon cover and antioxidation dipping treatment method thereof |
| CN103820627A (en) * | 2014-01-02 | 2014-05-28 | 中国平煤神马集团开封炭素有限公司 | Graphitic carbon sleeve production method |
| CN103820627B (en) * | 2014-01-02 | 2015-11-25 | 中国平煤神马集团开封炭素有限公司 | A kind of graphite charcoal cover production method |
| WO2015124078A1 (en) * | 2014-02-18 | 2015-08-27 | 朱建新 | Combined directly-heating resistance furnace |
| CN114773065A (en) * | 2022-04-13 | 2022-07-22 | 廊坊中英石棉化工有限公司 | High and low temperature resistant graphite pad and preparation method thereof |
| CN117848047A (en) * | 2024-03-07 | 2024-04-09 | 山西科福能源科技有限公司 | Pressure roasting furnace for graphite preparation |
| CN117848047B (en) * | 2024-03-07 | 2024-05-07 | 山西科福能源科技有限公司 | Pressure roasting furnace for graphite preparation |
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