CN1060429A - The hollow graphite electrode Processes and apparatus is produced in vibratory compaction - Google Patents
The hollow graphite electrode Processes and apparatus is produced in vibratory compaction Download PDFInfo
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- CN1060429A CN1060429A CN 91108416 CN91108416A CN1060429A CN 1060429 A CN1060429 A CN 1060429A CN 91108416 CN91108416 CN 91108416 CN 91108416 A CN91108416 A CN 91108416A CN 1060429 A CN1060429 A CN 1060429A
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- punching block
- electrode
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- graphite electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/022—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space whereby the material is subjected to vibrations
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- Carbon And Carbon Compounds (AREA)
Abstract
A kind of hollow graphite electrode moulding process and equipment, it with refinery coke, coal-tar pitch, pitch coke be raw material, through the calcining, crush and screen, be made into thickener, be heated to 120-130 ℃, be filled in the ring section of a coaxial sleeve formula punching block.At 1.0-1.5 kilograms per centimeter 2 pressure, after down upright the shaking 7-8 minute of vibrating 2500-3000 time/minute, from punching block, release, cooling, carry out roasting, graphitization processing again, be machined into desired size.Its telescoping punching block is a round jacket steel pipe 2, the coaxial core pipe 4 of a required diameter and one form with top round plate 5, the diameter of circular steel plate 5 is equal to or slightly less than the outer tube internal diameter, this legal system gets coreless armature, yield rate height, flawless, conforms with smelting requirements fully than resistance, intensity, proportion.
Description
The present invention relates to the production method of electrosmelting, particularly relate to the manufacture method of the big Graphite Electrodes of intermediate hollow with Graphite Electrodes.
Along with Electric furnace steel making and silicon metal, the increase of electric furnace power such as yellow phosphorus, artificial graphite electrode also will develop towards big specification direction.The increase of electrode diameter, make electrode in moulding, roasting graphitization process,, and cause scrap rate to increase greatly because of thermal stresses cracks.At present, the scrap rate of the artificial graphite electrode of the above specification of each charcoal ink factory ∮ 400mm is much higher than the electrode of the following specification of ∮ 350mm, and ∮ 400mm is longer than the electrode of ∮ 350mm and following specification with the roasting and the greying curve of top electrode, so just increase unit consumption, reduced output.
In order to reduce heating region and the heating efficiency that electrode thermal shocking in use and electric and magnetic oscillation improve Graphite Electrodes, EPO, 193,918, EPO.082,678, US3,422,205, US3,231,177, refer to the structure and the use of graphite heating pipe, but do not introduced the manufacturing process of hollow graphite electrode.
The objective of the invention is with refinery coke, coal-tar pitch, pitch coke is the method and apparatus of a kind of intermediate hollow electrode of raw material production, it is excessive and the drawback of crackle takes place to improve electrode thermal stresses in thermal treatment, reduce scrap rate, shorten roasting and graphited curve, the consumption reduction volume increase.Improve impregnated electrode rate of body weight gain, reduce the loss of sheet accident that electrode in use produces because of thermal shocking and electric and magnetic oscillation.
The production method of hollow electrode of the present invention be on the basis of the upright shaped electrode technology of shaking of single shaft or dual-axis vibration platform, produce, the general technology process is to be raw material with refinery coke, coal-tar pitch, pitch coke, through calcine, crush and screen, batching, mixing become thickener to be heated in the ring section of the 120-130 ℃ of coaxial sleeve tube punching block of packing into, in the 1.0-1.5 kilograms per centimeter
2Pressure, vibrate 2500-3000 time/minute under, after vertical vibrating 7-8 minute, the electrode material is released from punching block, water cooling become parison, carry out roasting again, graphitization processing is machined into desired size.Its characteristics are to vibrate compression moulding and adopt a coaxial sleeve tube punching block.Promptly at the center of circular punching block, put the stainless steel tube of a suitable diameter perpendicular to table top, its diameter of steel tube is decided on the size of electrode diameter, and installs a round plate that equates with the punching block internal diameter at the table top centre bit, and it is top that round plate central vertical weldering one equates with the stainless steel tube internal diameter.During moulding, the upper end of steel pipe is enclosed within the centre hole of electrode pressure cap, and the lower end is inserted in on the top circular steel plate.At this moment, start bobbing machine, cooperate the pasty state material to add continuously in the punching block prepared electrode, after punching block is filled it up with, promptly slowly fall weight, the pressure cap below the weight is pressed in the punching block, pick up counting this moment, shuts down the demoulding after 8 minutes.During the demoulding, earlier weight and pressure cap are mentioned, the punching block that fell again transfers to steel pipe to pass through top cap 9 with demoulding plunger again in level attitude then, the electrode base is released from punching block, and the trickle cooling gets final product rapidly.
Accompanying drawing is a hollow graphite electrode moulding process sketch
Fig. 1, reinforced completed state diagrammatic sketch;
Fig. 2 falls weight completed state diagrammatic sketch;
Fig. 3, demoulding state diagram.
The number in the figure sign, 1 punching block, 2 heating jackets, 3 thickeners, 4 hollow steel pipes, 5 are with top first steel plate, 6 shaking tables, 7 weights, 8 cool material platforms, 9 top caps, 10 demoulding plungers, 11 wireline, 12 pulleys, 13 windlasss.
Embodiment, get 70 parts of raw material refinery cokes, behind 5 parts of mixings of pitch coke in the continuous calcining stove in 1300 ℃ of temperature lower calcinations after about 17 hours, cool off, broken, levigate, screening, press granulometric composition＜0.075mm60% again, 0.8-1.0mm11%, 1-2mm14%, 2-4mm15% prepares burden, the siccative for preparing is added preheating in the mixed kneading machine, when temperature reaches 120 ℃ of left and right sides, add 25 parts of coal-tar pitch after the fusing dehydration, mix and pinch, the pasty state material of certain plasticity is evenly arranged, added then in the aforementioned punching block at 1-1.5kg/cm
2Pressure, vibrate vibratory compaction under 2500-3000 time/minute condition, vibratory compaction and stripping operation are undertaken by preceding method, obtain the electrode green compact of hollow, place stoving oven about 400 hours, in graphitizing furnace, under 2500-3000 ℃ high temperature, to carry out greying again on green compact, carry out mechanical workout after the taking-up cooling 0-1350 ℃ of roasting, electrode cylindrical and end are processed into desired size, obtain the artificial graphite electrode finished product of hollow.The electrode hollow section accounts for the long-pending 1-25% of electrode sections, is guaranteed power, the long-pending 1-10% that accounts for electrode sections of best hollow section.
The performance of the hollow artificial graphite electrode that obtains like this is not less than 9 than resistance
Mm
2/ m, folding strength is not less than 75kg/cm
2, ultimate compression strength is not less than 180kg/mm
2, true specific gravity reaches 2.18g/cm
3, flawless.
Claims (2)
1, a kind of hollow graphite electrode forming method is characterized in that the electrode paste that will be heated to 120-130 ℃, in the coaxial sleeve tube punching block ring section of packing into, in the 1.0-1.5 kilograms per centimeter
2Pressure, vibrate 2500-3000 time/minute under, upright after vibrational 7-8 minute, the electrode material is released from punching block, water cooling gets final product.
2, a kind of punching block that is used for the moulding of claim 1 manufacturing hollow graphite electrode, be characterized in the coaxial sleeve tube punching block, it is by round jacket pipe 2, the coaxial core pipe 4 of required diameter, one with top steel plate 5 compositions, external diameter with top steel plate 5 is slightly less than outer tube 2 internal diameters, and the top external diameter that is fixed on the center is equal to or slightly less than the internal diameter of core pipe 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108416 CN1026646C (en) | 1991-10-28 | 1991-10-28 | Technology and apparatus for producing hollow graphite electrode by vibration shaping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108416 CN1026646C (en) | 1991-10-28 | 1991-10-28 | Technology and apparatus for producing hollow graphite electrode by vibration shaping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060429A true CN1060429A (en) | 1992-04-22 |
| CN1026646C CN1026646C (en) | 1994-11-16 |
Family
ID=4909279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91108416 Expired - Fee Related CN1026646C (en) | 1991-10-28 | 1991-10-28 | Technology and apparatus for producing hollow graphite electrode by vibration shaping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026646C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249680A (en) * | 2010-12-20 | 2011-11-23 | 龚炳生 | Preparation method of hollow graphite electrode |
| CN102363525A (en) * | 2011-07-01 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Dry material heater |
| CN102672793A (en) * | 2012-05-26 | 2012-09-19 | 河北顺天电极有限公司 | Variable-frequency vibration forming process for carbon electrodes |
| CN102997662A (en) * | 2011-09-13 | 2013-03-27 | 黄石鑫华轮毂有限公司 | Aluminum ingot melting furnace graphite plate connection rod |
| CN107638853A (en) * | 2017-09-06 | 2018-01-30 | 河海大学 | Electrochemical reaction appts and preparation method thereof |
| CN108541096A (en) * | 2018-05-25 | 2018-09-14 | 山西丹源碳素股份有限公司 | A kind of monoblock type internal thermal tandem graphitization furnace tip electrode and preparation method thereof |
| CN110642244A (en) * | 2019-10-08 | 2020-01-03 | 杭州高烯科技有限公司 | Preparation method of graphene and graphene oxide |
| CN111116200A (en) * | 2019-12-27 | 2020-05-08 | 重庆东星炭素材料有限公司 | Carbon electrode with conical central hole and preparation method thereof |
| CN114536843A (en) * | 2022-03-02 | 2022-05-27 | 中钢新型材料股份有限公司 | Vibration molding graphite preparation equipment for artware processing and process thereof |
-
1991
- 1991-10-28 CN CN 91108416 patent/CN1026646C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249680A (en) * | 2010-12-20 | 2011-11-23 | 龚炳生 | Preparation method of hollow graphite electrode |
| CN102363525A (en) * | 2011-07-01 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Dry material heater |
| CN102363525B (en) * | 2011-07-01 | 2013-01-23 | 中国平煤神马集团开封炭素有限公司 | Dry material heater |
| CN102997662A (en) * | 2011-09-13 | 2013-03-27 | 黄石鑫华轮毂有限公司 | Aluminum ingot melting furnace graphite plate connection rod |
| CN102672793A (en) * | 2012-05-26 | 2012-09-19 | 河北顺天电极有限公司 | Variable-frequency vibration forming process for carbon electrodes |
| CN102672793B (en) * | 2012-05-26 | 2015-05-13 | 河北顺天电极有限公司 | Variable-frequency vibration forming process for carbon electrodes |
| CN107638853A (en) * | 2017-09-06 | 2018-01-30 | 河海大学 | Electrochemical reaction appts and preparation method thereof |
| CN108541096A (en) * | 2018-05-25 | 2018-09-14 | 山西丹源碳素股份有限公司 | A kind of monoblock type internal thermal tandem graphitization furnace tip electrode and preparation method thereof |
| CN110642244A (en) * | 2019-10-08 | 2020-01-03 | 杭州高烯科技有限公司 | Preparation method of graphene and graphene oxide |
| CN111116200A (en) * | 2019-12-27 | 2020-05-08 | 重庆东星炭素材料有限公司 | Carbon electrode with conical central hole and preparation method thereof |
| CN114536843A (en) * | 2022-03-02 | 2022-05-27 | 中钢新型材料股份有限公司 | Vibration molding graphite preparation equipment for artware processing and process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1026646C (en) | 1994-11-16 |
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