CN103249194A - Large-diameter high-graphite carbon electrode and production method thereof - Google Patents
Large-diameter high-graphite carbon electrode and production method thereof Download PDFInfo
- Publication number
- CN103249194A CN103249194A CN2013101893911A CN201310189391A CN103249194A CN 103249194 A CN103249194 A CN 103249194A CN 2013101893911 A CN2013101893911 A CN 2013101893911A CN 201310189391 A CN201310189391 A CN 201310189391A CN 103249194 A CN103249194 A CN 103249194A
- Authority
- CN
- China
- Prior art keywords
- graphite
- resistance rod
- carbon resistance
- graphite carbon
- major diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Carbon And Carbon Compounds (AREA)
- Discharge Heating (AREA)
Abstract
The invention discloses a large-diameter high-graphite carbon electrode. The invention is characterized in that the large-diameter high-graphite carbon electrode is prepared from the following materials in weight percentage: 20 percent of coal pitch, 55 percent of graphite material and 25 percent of calcined-coke. The graphite material and the calcined-coke are evenly distributed in a coal pitch bonding medium. Compared with the prior art, the graphite content of the large-diameter carbon electrode disclosed by the invention can reach 50 percent. Moreover, the mechanical strength is high, so that the phenomena of cracking, fracturing and softening cannot easily occur.
Description
Technical field
The present invention relates to a kind of major diameter high graphite carbon resistance rod and production method thereof.
Background technology
In smelting production, conductive electrode is important component part in the hot stove conducting system in ore deposit, " heart " that is called as the hot stove in ore deposit, also be one of main consumable material during the hot stove in ore deposit is produced, can the kind of conductive electrode and relationship between quality normally carry out examination with every economic and technical norms to ferroalloy production.Have three classes as the hot stove conductive electrode in ore deposit on the market at present: graphite electrode, carbon resistance rod and self-baking electrode.
The graphite electrode ash content is low, resistivity is low, permission current density height, examination on power consumption, graphite electrode should be optimal selection, but the technological process of production of graphite electrode is long, when graphitization, need expend a large amount of electric energy especially, according to data, 1 ton of graphitization power consumption is about 4500 kwh to 5000kwh, its product price is also quite high, be carbon resistance rod and self-baking electrode price two to four times, moreover graphite electrode is subjected to its moulding process (extrusion modling) restriction, and product specification is 700mm to the maximum, can not satisfy the trend requirement that the hot heat size in ore deposit constantly enlarges.And self-baking electrode is not because passing through calcining process in manufacturer, decompose during hot stove roasting in the ore deposit and to discharge a large amount of bitumen flue gas and can't focus on and directly be discharged in the atmosphere, worsen the hot furnace operating environment in ore deposit, bring serious harm to atmospheric environment simultaneously, and self-baking electrode resistivity is big, unit product power consumption is big, of poor quality, and the soft disconnected or hard disconnected quality accident that waits very easily takes place, and brings great hidden danger of quality and personal safety hidden danger to the hot furnace operating in ore deposit.
At present, the capacity of the hot stove in ore deposit increasing (external large-scale ore heat furnace transformer capacity has reached 1000000KVA), country is more and more tighter to requirement on environmental protection.The transformer capacity of the hot stove in ore deposit is more big, just mean needs conductive electrode diameter just more big, quality requirement is just more high.High graphite carbon resistance rod and above-mentioned three kinds of electrode ratios, not only price is low, quality is high, and can realize large diameter requirement.
Common carbon resistance rod main component is electric forging coal, forges back Jiao, coal tar pitch and a spot of graphite material on the market now, and its conductivity is relatively poor, intensity is not high.According to the influence of carbon electrode material to its electric conductivity, graphite material content is more high, resistivity just more low, electric conductivity is just more high, smelting industry power consumption is just more low, but along with the content of graphite material increases gradually, will bring the difficulty of electrode blank moulding, big because of electrode diameter simultaneously, roasted product crackle and electrode inside and outside easily take place cause product quality inconsistent greatly because of the temperature difference, the difficulty of the production of major diameter carbon resistance rod is bigger.
The Chinese patent 2010101369138 that my company has, the applying date is on March 31st, 2010, and Granted publication day is on December 28th, 2011, discloses a kind of major diameter semi-graphite carbon electrode and production method thereof, and the content of graphite of this carbon resistance rod has reached 40%.It has that conductive effect is good, compact structure, mechanical strength height, be not easy to occur the advantage of crackle, fracture or ruckbildung.But the technical scheme content of graphite that this patent adopts has reached the limit, if improve the content of graphite again, the electrode blank moulding will difficulty.
Summary of the invention
The invention provides a kind of major diameter high graphite carbon resistance rod and production method thereof.
Technical scheme of the present invention is: a kind of major diameter high graphite carbon resistance rod, made by the material of following percentage by weight: and 20% coal tar pitch, 55% graphite material, burnt after 25% the forging; Described graphite material, forging back Jiao are evenly distributed in the coal tar pitch cementing medium.
Further, described graphite material is that graphite powder is or/and graphite scrap.
Further, described coal tar pitch is modified coal asphalt.
Further, the diameter of described major diameter high graphite carbon resistance rod is greater than 1200mm.
A kind of production method of major diameter high graphite carbon resistance rod may further comprise the steps:
1) material metage of following percentage by weight is standby: 20% coal tar pitch, 55% graphite material, burnt after 25% the forging;
2) will mix pinch the pot be preheated to 140 ℃, under the normal pressure electro-forge coal, graphite material are added mixed pinching and be heated to 140 ℃ in the pot, do and mix 15min, discharge the moisture in the material, add then and melt fully and through sufficient standing and the temperature coal tar pitch at 180 ℃, wet mixing was the thickener shape in 45 minutes and takes the dish out of the pot, and entered in the hopper;
3) thickener in the hopper is put into through preheating and temperature stabilization mixed tube at 80 ℃ the material that dries in the air, through 15 minutes the stirring material that dries in the air, the bitumen flue gas in the thickener does not have most of discharge, when the thickener temperature reaches 110 ℃, puts into meausring apparatus and weighs;
4) adopting horizontal type bidirectional vibration molding technique, is high graphite carbon resistance rod green compact with the thickener vibration moulding after weighing;
5) adopt energy-efficient ring-form calcining furnace, high graphite carbon resistance rod green compact under the protection of protective medium, under the secluding air condition, are carried out roasting to green compact;
6) the semi-graphite carbon resistance rod of roasting being finished carries out processing excircles and screw thread at lathe.
Compared with prior art, major diameter carbon resistance rod content of graphite of the present invention can reach 50%, and the mechanical strength height, is not easy to occur occurring easily crackle, fracture and ruckbildung.
Embodiment
The present invention will be further described below by specific embodiment.
1) material metage of following percentage by weight is standby: 20% coal tar pitch, 55% graphite material, burnt after 25% the forging;
2) will mix pinch the pot be preheated to 140 ℃, under the normal pressure electro-forge coal, graphite material are added mixed pinching and be heated to 140 ℃ in the pot, do and mix 15min, discharge the moisture in the material, add then and melt fully and through sufficient standing and the temperature coal tar pitch at 180 ℃, wet mixing was the thickener shape in 45 minutes and takes the dish out of the pot, and entered in the hopper;
3) thickener in the hopper is put into through preheating and temperature stabilization mixed tube at 80 ℃ the material that dries in the air, through 15 minutes the stirring material that dries in the air, the bitumen flue gas in the thickener does not have most of discharge, when the thickener temperature reaches 110 ℃, puts into meausring apparatus and weighs;
4) adopting horizontal type bidirectional vibration molding technique, is high graphite carbon resistance rod green compact with the thickener vibration moulding after weighing;
5) adopt energy-efficient ring-form calcining furnace, high graphite carbon resistance rod green compact under the protection of protective medium, under the secluding air condition, are carried out roasting to green compact;
6) the high graphite carbon resistance rod of roasting being finished carries out processing excircles and screw thread at lathe.
High graphite carbon resistance rod diameter of the present invention can reach more than the 1200mm, is processed into different specifications as required, is that 1200mm, diameter are 1400mm as diameter, and its technical indicator can reach: resistivity 10.0～15.0 μ Ω m; Rupture strength 9.0～10.0 Mpa; Ash content≤2.0 %.
All simple distortion of making under the situation that does not break away from core of the present invention or modification all fall into protection scope of the present invention.
Claims (5)
1. a major diameter high graphite carbon resistance rod is characterized in that, is made by the material of following percentage by weight: burnt after 20% coal tar pitch, 55% graphite material, 25% the forging; Described graphite material, forging back Jiao are evenly distributed in the coal tar pitch cementing medium.
2. a kind of major diameter high graphite carbon resistance rod according to claim 1 is characterized in that, described graphite material is that graphite powder is or/and graphite scrap.
3. a kind of major diameter high graphite carbon resistance rod according to claim 1 is characterized in that described coal tar pitch is modified coal asphalt.
4. a kind of major diameter high graphite carbon resistance rod according to claim 1 is characterized in that the diameter of described major diameter high graphite carbon resistance rod is greater than 1200mm.
5. the production method of a major diameter high graphite carbon resistance rod is characterized in that, may further comprise the steps:
1) material metage of following percentage by weight is standby: 20% coal tar pitch, 55% graphite material, burnt after 25% the forging;
2) will mix pinch the pot be preheated to 140 ℃, under the normal pressure electro-forge coal, graphite material are added mixed pinching and be heated to 140 ℃ in the pot, do and mix 15min, discharge the moisture in the material, add then and melt fully and through sufficient standing and the temperature coal tar pitch at 180 ℃, wet mixing was the thickener shape in 45 minutes and takes the dish out of the pot, and entered in the hopper;
3) thickener in the hopper is put into through preheating and temperature stabilization mixed tube at 80 ℃ the material that dries in the air, through 15 minutes the stirring material that dries in the air, the bitumen flue gas in the thickener does not have most of discharge, when the thickener temperature reaches 110 ℃, puts into meausring apparatus and weighs;
4) adopting horizontal type bidirectional vibration molding technique, is high graphite carbon resistance rod green compact with the thickener vibration moulding after weighing;
5) adopt energy-efficient ring-form calcining furnace, high graphite carbon resistance rod green compact under the protection of protective medium, under the secluding air condition, are carried out roasting to green compact;
6) the semi-graphite carbon resistance rod of roasting being finished carries out processing excircles and screw thread at lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189391.1A CN103249194B (en) | 2013-05-21 | 2013-05-21 | A kind of large-diameter high-graphite carbon electrode and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189391.1A CN103249194B (en) | 2013-05-21 | 2013-05-21 | A kind of large-diameter high-graphite carbon electrode and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103249194A true CN103249194A (en) | 2013-08-14 |
| CN103249194B CN103249194B (en) | 2016-04-06 |
Family
ID=48928343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310189391.1A Active CN103249194B (en) | 2013-05-21 | 2013-05-21 | A kind of large-diameter high-graphite carbon electrode and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103249194B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561498A (en) * | 2013-11-19 | 2014-02-05 | 重庆东星高温材料有限公司 | Carbon electrode special for ferrochrome smelting and manufacturing method thereof |
| CN108892136A (en) * | 2018-07-03 | 2018-11-27 | 大同新成新材料股份有限公司 | A kind of manufacturing process of high-heat resistance shock resistant graphite electrode |
| 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 |
| CN114804879A (en) * | 2022-03-28 | 2022-07-29 | 重庆东星炭素材料有限公司 | High graphite vertical forming production method |
| CN117438129A (en) * | 2023-10-26 | 2024-01-23 | 重庆森仟烨新材料科技股份有限公司 | Regenerated graphite electrode and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2058639C1 (en) * | 1992-12-28 | 1996-04-20 | Государственный научно-исследовательский институт конструкционных материалов на основе графита | Material for electric brushes and its production process |
| CN101808435A (en) * | 2010-03-31 | 2010-08-18 | 焦作市东星炭电极有限公司 | Full-diameter carbon electrode made from schungite and production method thereof |
| CN101983002A (en) * | 2010-11-26 | 2011-03-02 | 河北联冠电极股份有限公司 | Special carbon electrode for smelting of titanium slag and preparation method thereof |
-
2013
- 2013-05-21 CN CN201310189391.1A patent/CN103249194B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2058639C1 (en) * | 1992-12-28 | 1996-04-20 | Государственный научно-исследовательский институт конструкционных материалов на основе графита | Material for electric brushes and its production process |
| CN101808435A (en) * | 2010-03-31 | 2010-08-18 | 焦作市东星炭电极有限公司 | Full-diameter carbon electrode made from schungite and production method thereof |
| CN101983002A (en) * | 2010-11-26 | 2011-03-02 | 河北联冠电极股份有限公司 | Special carbon electrode for smelting of titanium slag and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561498A (en) * | 2013-11-19 | 2014-02-05 | 重庆东星高温材料有限公司 | Carbon electrode special for ferrochrome smelting and manufacturing method thereof |
| CN108892136A (en) * | 2018-07-03 | 2018-11-27 | 大同新成新材料股份有限公司 | A kind of manufacturing process of high-heat resistance shock resistant graphite electrode |
| 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 |
| CN114804879A (en) * | 2022-03-28 | 2022-07-29 | 重庆东星炭素材料有限公司 | High graphite vertical forming production method |
| CN117438129A (en) * | 2023-10-26 | 2024-01-23 | 重庆森仟烨新材料科技股份有限公司 | Regenerated graphite electrode and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103249194B (en) | 2016-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101808435B (en) | Full-diameter carbon electrode made from schungite and production method thereof | |
| CN103249194B (en) | A kind of large-diameter high-graphite carbon electrode and production method thereof | |
| CN107032791B (en) | Large-size high-power graphite electrode and manufacturing method thereof | |
| CN106376121B (en) | High-graphite carbon electrode and preparation method thereof | |
| CN107651961B (en) | High-power carbon electrode for submerged arc furnace and preparation method thereof | |
| CN103796366A (en) | Airtight electrode paste and manufacturing method thereof | |
| CN101696116A (en) | Production method of large-size graphite electrode | |
| CN102363526A (en) | Ultra high power graphite electrode with its diameter being 650mm and production method thereof | |
| CN101983002B (en) | Special carbon electrode for smelting of titanium slag and preparation method thereof | |
| CN110628446A (en) | Coking method for increasing coke granularity | |
| CN105271207A (en) | Preparation process of isostatic pressing isotropic graphite | |
| CN107857261A (en) | A kind of preparation method of nuclear graphite materials | |
| CN101696003B (en) | Technical formulation for carbon electrode and method for producing carbon electrode | |
| CN102815731A (en) | Smelting technique of brown corundum | |
| CN102355759A (en) | Charcoal electrode specially used in smelting of ferroalloy and preparation method thereof | |
| CN105039626A (en) | Vanadium slag preparation method | |
| CN103979981B (en) | A kind of big specification semi-graphite carborundum carbon brick and production technology thereof | |
| CN117438129A (en) | Regenerated graphite electrode and preparation method thereof | |
| CN104692427B (en) | A kind of Brown Alundum smelting process | |
| CN102765735A (en) | Production method of special additive for electrical high temperature magnesium oxide | |
| CN102285788A (en) | Method for preparing electroconductive ceramic product from pyrite cinder | |
| CN104661337A (en) | Resistance material and use method thereof | |
| CN101420801A (en) | Graphite electrode with quasi-ultra-high power | |
| CN107642997A (en) | A kind of equipment smelted for steel | |
| CN107902908A (en) | It is a kind of to utilize devitrified glass of iron tailings processing and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |