CN1247451C - High density and intensity abrasive resistant graphite materials and producing process thereof - Google Patents

High density and intensity abrasive resistant graphite materials and producing process thereof Download PDF

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Publication number
CN1247451C
CN1247451C CN 200410044348 CN200410044348A CN1247451C CN 1247451 C CN1247451 C CN 1247451C CN 200410044348 CN200410044348 CN 200410044348 CN 200410044348 A CN200410044348 A CN 200410044348A CN 1247451 C CN1247451 C CN 1247451C
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graphite
roasting
density
briquetting
siccative
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CN 200410044348
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CN1583557A (en
Inventor
靳登永
张凤英
任泽军
张佃宏
孙慧
赵龙
石建平
南效凯
赵旭江
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XINGHE XINGYONG CARBON CO Ltd
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XINGHE XINGYONG CARBON CO Ltd
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Abstract

The present invention discloses a graphite material with high density, high strength and wear resistance and a production technology thereof, the graphite material is suitable for electric spark processing, or the graphite material can be used for wear resistant materials. The graphite material comprises dry materials and binders, and is prepared by kneading, sheet rolling, secondary grinding, briquetting, roasting, impregnating, re-roasting, graphitizing, etc. The present invention has the advantages that the graphite material produced by the technology has high quality, is suitable for the electric spark processing or the wear resistant materials and has the characteristics of high purity, high density, high strength, good wear resistant performance and long service life.

Description

The production technique of high-density, high strength and wear-resisting graphite material
Technical field:
The present invention relates to a kind of production technique of graphite material, especially relate to a kind of electrospark machining that is applicable to and use or can be used for the production technique of high-density, high strength and the wear-resisting graphite material of high-abrasive material.
Background technology:
The existing graphite material that is used for the graphite material of electrical spark or is used for high-abrasive material is that purity is low, intensity difference, use properties be bad mostly, and wear resisting property is poor, and work-ing life is short, the cost height.
Summary of the invention:
The object of the present invention is to provide high purity, the high-density, high-intensity of using or can be used for high-abrasive material applicable to electrospark machining, wear resisting property is good, a kind of graphite material of long service life.
Another object of the present invention is high purity, the high-density, high-intensity of using or can be used for high-abrasive material applicable to electrospark machining is provided, and wear resisting property is good, the production technique of a kind of graphite material of long service life.
First purpose of the present invention is implemented by following technical scheme: high-density, high strength, wear-resisting graphite material, and it includes siccative and binding agent, through mixing alunite, rolls sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. make again, and wherein by weight, siccative includes after-smithing petroleum coke 0~55, pitch coke 25~80, and a stage powder 15~40, Graphite Powder 99 5~10 mixes; Wherein by weight, per 100 parts of siccatives add 42 parts~48 parts binding agent.
By weight, a described stage powder is per 100 parts of carbon blacks, add and dissolve 60~70 parts of viscid bitumens.
Another object of the present invention is implemented by following technical scheme: it includes stage powder preparation; Siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. again;
(1), the preparation of a stage powder: at first 100 parts of carbon blacks are done by weight and mixed 15~25 minutes, after reaching temperature and being 80 ℃~120 ℃, add temperature and be 140 ℃~160 ℃ 60~70 parts the viscid bitumen that dissolves, mixed alunite 60 minutes~70 minutes, 140 ℃~160 ℃ of drop temperatures; Then will go out good material briquetting, and go in the stoving oven to carry out roasting with the material that presses is packaged, at described roasting kiln roasting, it was warmed up to 1200 ℃~1250 ℃ through 230 hours~250 hours; And then with baked material fragmentation, abrasive dust, its granularity is below 325 orders, makes a stage powder;
(2): siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting:
(a): siccative is formed: by weight, after-smithing petroleum coke is 0~55, pitch coke 25~80, and a stage powder is 15~40, Graphite Powder 99 is 5~10 mixing;
(b): siccative and binding agent mix alunite: will do in the pot mixed 30~45 minutes mixing to pinch as siccative as described in (a), reach 100 ℃~120 ℃, the binding agent that adds 140 ℃~160 ℃, mixed alunite 70 minutes~90 minutes, wherein by weight, as (a) described per 100 parts of siccatives, the binding agent that adds 42 parts~48 parts, drop temperature is 140 ℃~160 ℃ and takes the dish out of the pot, by rolling sheet twice, the thick 3mm that is not more than of sheet;
(c), secondary abrasive dust, briquetting: the secondary of (b) gained is rolled sheet stock carry out the abrasive dust second time, promptly get the secondary powder; Then with its briquetting; The shape of briquetting can be pressed into different shapes as the case may be, and the pressure of press varies in size, and makes the volume density difference of briquetting.
(3), sinter process:
Go in the roasting furnace the carbon of compression moulding is packaged, be heated to 1200 ℃~1250 ℃ through 300~600 hours, obtain baked article at the stampings of following (2) gained of airtight situation;
(4), impregnation technology: it is 240~340 ℃ that baked article is preheating to temperature, flood pack impregnating autoclave in for being no less than 8 hours warm up time, and wherein the pumpdown time is for being no less than 45 minutes, vacuum tightness: be not less than 0.086Mpa, moulding pressure 7~15kg/cm 2, be no less than 6 hours clamping time;
(5), sinter process again: impregnated goods are carried out roasting as described in (3); The gained baked article can be carried out double-steeping as required, three roastings or three dippings, and four roastings obtain roasting product.
(6), graphitization technique: the goods after the roasting are packed in the graphitizing furnace, switch under airtight situation, make goods through 70~170 hours, temperature reaches 2500~2800 ℃, promptly gets graphite material.
Described carbon black can be spray carbon black, semi-reinforcing carbon black, dim, channel black etc.
During described siccative was formed, wherein Graphite Powder 99 also can adopt natural graphite powder.
Described binding agent can be medium temperature coal pitch or resin.
Described resin can be furane resin, resol etc.
Advantage of the present invention is: by the graphite material quality height that this explained hereafter goes out, this graphite material is applicable to electrospark machining usefulness or high-abrasive material usefulness, and it has high purity, high-density, high-intensity, and wear resisting property is good, the characteristic of long service life.
Embodiment:
Embodiment 1: high-density, high strength and wear-resisting graphite material, include siccative and binding agent, and through mixing alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. make again, and wherein by weight, it is 15 that siccative includes 80, one stage of pitch coke powder, and Graphite Powder 99 is 5 mixing; Wherein by weight, per 100 parts of siccatives add 42 parts binding agent.By weight, a stage powder is per 100 parts of semi-reinforcing carbon blacks, add and dissolve 60 parts of viscid bitumens.
The production technique of high-density, high strength and wear-resisting graphite material includes stage powder preparation; Siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. again;
(1), the preparation of a stage powder: at first 100 parts of semi-reinforcing carbon blacks are done and were mixed 15 minutes, after reaching temperature and being 80 ℃, add temperature and be 140 ℃ dissolve 60 parts of viscid bitumens, mixed alunite 60 minutes, 140 ℃ of drop temperatures; Then will go out good material briquetting, the material piece that presses is put into stoving oven carries out roasting, and at the roasting kiln roasting, it was warmed up to 1200 ℃ through 230 hours; And then with baked material fragmentation, abrasive dust, its granularity is below 325 orders, makes a stage powder;
(2): siccative and binding agent medium temperature coal pitch mix alunite, roll sheet, secondary abrasive dust, briquetting:
(a): siccative is formed: by weight, 80, one stage of pitch coke powder is 15, and Graphite Powder 99 is 5 mixing;
(b): siccative and binding agent mix alunite: will do in the pot mixed 30 minutes mixed pinching as the siccative of (a), reach 100 ℃, the binding agent that adds 140 ℃, mixed alunite 70 minutes, wherein by weight, as per 100 parts of siccatives of (a), the binding agent that adds 42 parts, drop temperature is 140 ℃ and takes the dish out of the pot that by rolling sheet twice, sheet is thick to be 3mm;
(c), secondary abrasive dust, briquetting: the secondary of (b) gained is rolled sheet stock carry out the abrasive dust second time, promptly get the secondary powder; Then with its briquetting; The shape of briquetting can be pressed into different shapes as the case may be, and as 320 * 270 * 100mm, the pressure of press varies in size, and makes the volume density difference of briquetting, is 500 tons as press, and pressure is 250kg/cm 2, the volume density of its briquetting is 1.42g/cm 3
(3), sinter process:
Carbon piece 320 * 270 * 100mm of compression moulding is packed in the roasting furnace, be heated to 1200 ℃ at the stampings of following (2) gained of airtight situation through 320 hours and obtain baked article;
(4), impregnation technology: it is 240 ℃ that baked article is preheating to temperature, and be 5 hours warm up time, floods in the impregnating autoclave of packing into, and wherein the pumpdown time is 45 minutes, and vacuum tightness is 0.086Mpa, and moulding pressure is 7kg/cm 2, be 4 hours clamping time;
(5), sinter process again: impregnated goods are carried out roasting as described in (3);
(6), graphitization technique: the goods after the roasting are packed in the graphitizing furnace, switch under airtight situation, make goods through 70 hours, temperature reaches 2500 ℃, promptly gets graphite material.
Embodiment 2: high-density, high strength and wear-resisting graphite material, include siccative and binding agent, and through mixing alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. make again, and wherein by weight, it is 55 that siccative includes after-smithing petroleum coke, and 30, one stage of pitch coke powder is 20, and Graphite Powder 99 is 10 mixing; Wherein by weight, per 100 parts of siccatives add 48 parts binding agent.By weight, a stage powder is per 100 parts of spray carbon blacks, add and dissolve 70 parts of viscid bitumens.
The production technique of high-density, high strength and wear-resisting graphite material includes stage powder preparation; Siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. again;
(1), the preparation of a stage powder: at first spray carbon black is done for 100 parts and was mixed 25 minutes, after reaching temperature and being 120 ℃, add temperature and be 160 ℃ dissolve 70 parts of viscid bitumens, mixed alunite 70 minutes, 160 ℃ of drop temperatures; Then will go out good material briquetting, and go in the stoving oven to carry out roasting with the material that presses is packaged,, it was warmed up to 1250 ℃ through 250 hours; And then with baked material fragmentation, abrasive dust, its granularity is below 325 orders, makes a stage powder;
(2): siccative and binding agent furane resin mix alunite, roll sheet, secondary abrasive dust, briquetting:
(a): siccative is formed: by weight, after-smithing petroleum coke is 40, and 30, one stage of pitch coke powder is 20, and Graphite Powder 99 is 10 mixing;
(b): siccative and binding agent mix alunite: will do in the pot mixed 45 minutes mixed pinching as the siccative of (a), reach 120 ℃, the binding agent that adds 160 ℃, mixed alunite 90 minutes, wherein by weight, as per 100 parts of siccatives of (a), the binding agent that adds 48 parts, drop temperature is 160 ℃ and takes the dish out of the pot that by rolling sheet twice, sheet is thick to be 2.5mm;
(c), secondary abrasive dust, briquetting: the secondary of (b) gained is rolled sheet stock carry out the abrasive dust second time, promptly get the secondary powder; Then with its briquetting; The shape of briquetting can be pressed into different shapes as the case may be, and as 320 * 220 * 220mm, the pressure of press varies in size, and makes the volume density difference of briquetting, is 1000 tons as press, and pressure is 150kg/cm 2, the volume density of its briquetting is 1.50g/cm 3
(3), sinter process:
Carbon piece 320 * 220 * 220mm of compression moulding is packed in the roasting furnace, be heated to 1250 ℃ at the stampings of following (2) gained of airtight situation through 500 hours and obtain baked article;
(4), impregnation technology: it is 300 ℃ that baked article is preheating to temperature, and be 6 hours warm up time, floods in the impregnating autoclave of packing into, and wherein the pumpdown time is 45 minutes, and vacuum tightness is 0.086Mpa, and moulding pressure is 10kg/cm 2, be 5 hours clamping time;
(5), sinter process again: impregnated goods are carried out roasting as described in (3); The gained baked article can be carried out double-steeping as required, and three roastings obtain roasting product.
(6), graphitization technique: the goods after the roasting are packed in the graphitizing furnace, switch under airtight situation, make goods through 120 hours, temperature reaches 2600 ℃, promptly gets graphite material.
Embodiment 3: high-density, high strength and wear-resisting graphite material, include siccative and binding agent, and through mixing alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. make again, and wherein by weight, siccative comprises 23 parts of after-smithing petroleum cokes, 33 parts of pitch cokes, and a stage powder is 40 parts, 7 parts of mixing of natural graphite powder; Wherein by weight, per 100 parts of siccatives add 45 parts binding agent.One stage powder is per 100 parts of channel blacks, add to dissolve 65 parts of viscid bitumens.
The production technique of high-density, high strength and wear-resisting graphite material includes stage powder preparation; Siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique etc. again;
(1), the preparation of a stage powder: at first 100 parts of channel blacks are done and were mixed 20 minutes, after reaching temperature and being 100 ℃, add temperature and be 150 ℃ dissolve 65 parts of viscid bitumens, mixed alunite 65 minutes, 150 ℃ of drop temperatures; Then will go out good material briquetting, and go in the stoving oven to carry out roasting with the material that presses is packaged, at the roasting kiln roasting, it was warmed up to 1200 ℃ through 240 hours; And then with baked material fragmentation, abrasive dust, its granularity is below 325 orders, makes a stage powder;
(2): siccative and binding agent medium temperature coal pitch mix alunite, roll sheet, secondary abrasive dust, briquetting:
(a): siccative is formed: by weight, after-smithing petroleum coke is 23, and 33, one stage of pitch coke powder is 40, and natural graphite powder is 7 mixing;
(b): siccative and binding agent mix alunite: will do in the pot mixed 40 minutes mixed pinching as the siccative of (a), reach 110 ℃, the binding agent that adds 150 ℃, mixed alunite 80 minutes, wherein by weight, as per 100 parts of siccatives of (a), the binding agent that adds 45 parts, drop temperature is 150 ℃ and takes the dish out of the pot that by rolling sheet twice, sheet is thick to be 2mm;
(c), secondary abrasive dust, briquetting: the secondary of (b) gained is rolled sheet stock carry out the abrasive dust second time, promptly get the secondary powder; Then with its briquetting; The shape of briquetting can be pressed into different shapes as the case may be, is 660 * 320mm right cylinder as diameter, and the pressure of press varies in size, and makes the volume density difference of briquetting, is 1700 tons as press, and pressure is 230kg/cm 2, the volume density of its briquetting is 1.38g/cm 3
(3), sinter process:
With the carbon piece diameter of compression moulding is that 660 * 320mm right cylinder is packed in the roasting furnace, is heated to 1230 ℃ at the stampings of following (2) gained of airtight situation through 600 hours and obtains baked article;
(4), impregnation technology: it is 340 ℃ that baked article is preheating to temperature, and be 8 hours warm up time, floods in the impregnating autoclave of packing into, and wherein the pumpdown time is 45 minutes, and vacuum tightness is 0.086Mpa, and moulding pressure is 13kg/cm 2, be 6 hours clamping time;
(5), sinter process again: impregnated goods are carried out roasting as described in (3); The gained baked article can be carried out dipping three times, and four roastings obtain roasting product.
(6), graphitization technique: the goods after the roasting are packed in the graphitizing furnace, switch under airtight situation, make goods through 170 hours, temperature reaches 2700 ℃, promptly gets graphite material.

Claims (6)

1, the production technique of a kind of high-density, high strength and wear-resisting graphite material is characterized in that: it includes stage powder preparation; Siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting; Sinter process; Impregnation technology; Sinter process and graphitization technique again;
(1), the preparation of a stage powder: at first 100 parts of carbon blacks are done by weight and mixed 15~25 minutes, after reaching temperature and being 80 ℃~120 ℃, add temperature and be 140 ℃~160 ℃ 60~70 parts the viscid bitumen that dissolves, mixed alunite 60 minutes~70 minutes, 140 ℃~160 ℃ of drop temperatures; Then will go out good material briquetting, and go in the stoving oven to carry out roasting with the material that presses is packaged, at described roasting kiln roasting, it was warmed up to 1200 ℃~1250 ℃ through 230 hours~250 hours; And then with baked material fragmentation, abrasive dust, its granularity is below 325 orders, makes a stage powder;
(2): siccative and binding agent mix alunite, roll sheet, secondary abrasive dust, briquetting:
(a): siccative is formed: by weight, after-smithing petroleum coke is 0~55, pitch coke 25~80, and a stage powder is 15~40, Graphite Powder 99 is 5~10 mixing;
(b): siccative and binding agent mix alunite: will do in the pot mixed 30~45 minutes mixing to pinch as siccative as described in (a), reach 100 ℃~120 ℃, the binding agent that adds 140 ℃~160 ℃, mixed alunite 70 minutes~90 minutes, wherein by weight, as (a) described per 100 parts of siccatives, the binding agent that adds 42 parts~48 parts, drop temperature is 140 ℃~160 ℃ and takes the dish out of the pot, by rolling sheet twice, the thick 3mm that is not more than of sheet;
(c), secondary abrasive dust, briquetting: the secondary of (b) gained is rolled sheet stock carry out the abrasive dust second time, promptly get the secondary powder; Then with its briquetting;
(3), sinter process:
Go in the roasting furnace the carbon of compression moulding is packaged, be heated to 1200 ℃~1250 ℃ through 300~600 hours, obtain baked article at the stampings of following (2) gained of airtight situation;
(4), impregnation technology: it is 240~340 ℃ that baked article is preheating to temperature, flood pack impregnating autoclave in for being no less than 8 hours warm up time, and wherein the pumpdown time is for being no less than 45 minutes, vacuum tightness: be not less than 0.086Mpa, moulding pressure 7~15kg/cm 2, be no less than 6 hours clamping time;
(5), sinter process again: impregnated goods are carried out roasting as described in (3);
(6), graphitization technique: the goods after the roasting are packed in the graphitizing furnace, switch under airtight situation, make goods through 70~170 hours, temperature reaches 2500~2800 ℃, promptly gets graphite material.
2, the production technique of a kind of high-density according to claim 1, high strength and wear-resisting graphite material is characterized in that, described carbon black is spray carbon black, semi-reinforcing carbon black, dim or channel black.
3, the production technique of a kind of high-density according to claim 1, high strength and wear-resisting graphite material is characterized in that, during described siccative was formed, wherein Graphite Powder 99 adopted natural graphite powder.
4, the production technique of a kind of high-density according to claim 1, high strength and wear-resisting graphite material is characterized in that, described binding agent is medium temperature coal pitch or resin.
5, the production technique of a kind of high-density according to claim 4, high strength and wear-resisting graphite material is characterized in that, described resin is Resins, epoxy or resol.
6, the production technique of a kind of high-density according to claim 1, high strength and wear-resisting graphite material is characterized in that, the gained baked article is carried out double-steeping, three roastings or three dippings, and four roastings obtain roasting product.
CN 200410044348 2004-05-27 2004-05-27 High density and intensity abrasive resistant graphite materials and producing process thereof Expired - Fee Related CN1247451C (en)

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CN102774830A (en) * 2012-08-10 2012-11-14 昆明冶金研究院 Method for impregnating high-purity graphite by using high-purity coal tar pitch
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