CN101210332A - Graphitization cathode carbon block - Google Patents
Graphitization cathode carbon block Download PDFInfo
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- CN101210332A CN101210332A CNA2006101600338A CN200610160033A CN101210332A CN 101210332 A CN101210332 A CN 101210332A CN A2006101600338 A CNA2006101600338 A CN A2006101600338A CN 200610160033 A CN200610160033 A CN 200610160033A CN 101210332 A CN101210332 A CN 101210332A
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Abstract
The invention belongs to a graphitized cathode production technique. The provided graphitized cathode carbon block mainly consists of calcined coke and modified pitch, wherein the calcined coke contains particles of five grades including -8+4 mm,-4+2 mm,-2+0.5mm,-0.5 mm and-0.075 mm. By improving the size range of the dry materials in the raw materials, i.e. the calcined coke and baked scraps, it is verified by graphitization that the process can improve the qualified rate of graphitization from 20 to 30% to the current range of 80 to 85% after increasing the particle diameter. Repeated experiment, practice and demonstration determine that that the yield of the graphitized cathode carbon block is up to 92% by combining the sizes of the calcined coke and the baked scraps.
Description
Technical field
The invention belongs to the graphitization cathode production technology, mainly propose a kind of graphitization cathode carbon block.
Background technology
Graphitization cathode carbon block has bright development prospect, and it not only is used in the electrolysis of aluminum industry, and at present in other high-tech area: military project, medicine, metallurgy, chemical industry, aerospace etc. also have purposes widely.Graphitization cathode carbon block has four big advantages: good electrical conductivity, wear resistance, heat-shock resistance and excellent mechanical intensity are arranged.It is the best product that substitutes graphite cathode that graphitization cathode is known as by the world aluminum processing industry.The graphitization cathode technology all is in the research and development starting stage in the whole world, it is representing the developing direction of aluminum electrolysis industry, use electrolyzer unit's production capacity of graphitization cathode can improve 10-15%, one ton of aluminium of every production can economize on electricity more than 500 degree, and the work-ing life that can effectively improve electrolyzer.
The production technique of graphitization cathode is: the refinery coke of 1A level reaches than resistance less than 550 μ Ω m, very close greater than 2.07g/cm raw material through the calcining of pot furnace
3To forge the back burnt, after process crushing system, screening system are divided into the various size fractionated that meet processing requirement, enter batch bin separately,-200 order content made from scratch system are 70% powder, carry out proportioning according to certain ratio by burden balance, put into then to mix and pinch after the pot preheating reaches technological temperature, through certain routine processes, add quantitative liquid modified pitch, mix again pinch, cool material, vibratory compaction obtain giving birth to cathode block; Behind bakes to burn the article, dipping, re-baking, put into graphitizing furnace again, under 3000 ℃ of high temperature, carry out greying,, supply with industries such as electrolysis of aluminum, metallurgy and use then through the graphitization cathode carbon block of rough milling, finish-milling becomes different size.
Graphitization cathode carbon block is mainly formed by forging the burnt and modified pitch in back, also often adds roasting broken (refinery coke become after high-temperature calcination forge Jiao afterwards, it is broken that the useless cathode block after the roasting is called as roasting) in actual production for reducing production costs.The theory of design is that small-particle is formed for the raw material particle in existing the production, it is 4-0 totally four grades that particle requires, be divided into 4-2mm, 2-1mm, 1-0.5mm ,-0.5mm, with the cathode block of this grade raw material production through roasting, greying after, scrap rate is more, what greying was minimum only has about 30%, even lower.
Summary of the invention
The purpose that the present invention proposes graphitization cathode carbon block just is by the improvement to grain size of raw material assembly adding, improves the qualification rate of graphitization cathode carbon block.
In the graphitization cathode carbon block of the present invention, its raw material mainly contains forges back Jiao and modified pitch, and what added forges the particle that back Jiao has five grades, and its five grades are-8+4mm-4+2mm ,-2+0.5mm ,-0.5mm ,-0.075mm.
From the consideration that reduces production costs, it is broken to add roasting in the raw material, and it has the particle of two grades, promptly-12+4mm and-4+0mm.
Forge the siccative in back Jiao and the broken formation raw materials for production of roasting, forge the 85-95% that the burnt amount of allocating in back accounts for the siccative gross weight, the broken amount of allocating into of roasting accounts for the 5-15% of siccative gross weight.Wherein, forging afterwards, the weight ratio of its add-on of particle of five grades of Jiao is :-8+4mm 8-13% ,-4+2mm 15-20% ,-2+0.5mm 13-18% ,-0.5mm 19-20% ,-0.075mm 25-30%.The weight ratio of its add-on of particle of broken two grades of roasting is :-12+4mm 3-10% ,-4+0mm 2-5%.
The liquid modified pitch with become thickener through the siccative of preheating through mixing to pinch, modified pitch accounts for the 17-19% of thickener weight.
In the production technique of the present invention by siccative in the raw material promptly being forged the improvement of the burnt and roasting particle level in back, strengthen particle dia, through the greying checking, after particle dia strengthens, the greying qualification rate is brought up in the present 80-85% stable range by original 20-30%, determine to forge back Jiao and the broken grade assembly of roasting through testing repeatedly, put into practice and proving, make the graphitization cathode carbon block qualification rate reach 92%.
Embodiment
Provide specific embodiments of the invention:
Embodiment 1:
Mainly the back is burnt, roasting is broken and modified pitch is formed by forging for raw material, and wherein, the weight ratio of forging its add-on of particle of burnt five grades in back is :-8+4mm 13%, and-4+2mm 20%, and-2+0.5mm 18%, and-0.5mm 19%, and-0.075mm 25%; The weight ratio of its add-on of particle of broken two grades of roasting is :-12+4mm 3%, and-4+0mm 2%; Modified pitch accounts for 17% of thickener weight.The production technique of its production technique and existing graphitization cathode carbon block is basic identical.
Embodiment 2:
The back is burnt, roasting is broken and modified pitch is formed by forging for raw material, and wherein, the weight ratio of forging its add-on of particle of burnt five grades in back is :-8+4mm 10%, and-4+2mm 18%, and-2+0.5mm 15% ,-0.5mm20%, and-0.075mm 27%; The weight ratio of its add-on of particle of broken two grades of roasting is :-12+4mm5%, and-4+0mm 5%; Modified pitch accounts for 18.5% of thickener weight.The production technique of its production technique and existing graphitization cathode carbon block is basic identical.
Embodiment 3:
The back is burnt, roasting is broken and modified pitch is formed by forging for raw material, and wherein, the weight ratio of forging its add-on of particle of burnt five grades in back is :-8+4mm 8%, and-4+2mm 15%, and-2+0.5mm 13% ,-0.5mm19%, and-0.075mm 30%; The weight ratio of its add-on of particle of broken two grades of roasting is :-12+4mm10%, and-4+0mm 5%; Modified pitch accounts for 19% of thickener weight.The production technique of its production technique and existing graphitization cathode carbon block is basic identical.
Claims (4)
1. graphitization cathode carbon block, its raw material mainly contain to be forged the burnt and modified pitch in back and form, and feature of the present invention is: what added forges the particle that back Jiao has five grades, and its five grades are :-8+4mm ,-4+2mm ,-2+0.5mm ,-0.5mm ,-0.075mm.
2. graphitization cathode carbon block according to claim 1 is characterized in that: adding in the raw material has roasting broken, the broken particle of roasting with two grades, and two grade is :-12+4mm ,-4+0mm.
3. graphitization cathode carbon block according to claim 1 and 2, it is characterized in that: described weight ratio of forging its add-on of particle of burnt five grades in back is :-8+4mm 8-13% ,-4+2mm 15-20% ,-2+0.5mm 13-18%,-0.5mm 19-20% ,-0.075mm 25-30%;
The weight ratio of its add-on of particle of broken two grades of roasting is :-12+4mm 3-10% ,-4+0mm2-5%.
4. graphitization cathode carbon block according to claim 1 is characterized in that: the add-on of modified pitch accounts for the 17-19% of thickener gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101600338A CN101210332A (en) | 2006-12-31 | 2006-12-31 | Graphitization cathode carbon block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101600338A CN101210332A (en) | 2006-12-31 | 2006-12-31 | Graphitization cathode carbon block |
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| Publication Number | Publication Date |
|---|---|
| CN101210332A true CN101210332A (en) | 2008-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101600338A Pending CN101210332A (en) | 2006-12-31 | 2006-12-31 | Graphitization cathode carbon block |
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| CN (1) | CN101210332A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665957B (en) * | 2009-09-23 | 2011-01-12 | 四川广汉士达炭素股份有限公司 | Anti-abrasion graphitization cathode carbon blocks used for aluminum electrolytic cell and manufacturing method thereof |
| CN107986786A (en) * | 2017-11-24 | 2018-05-04 | 大同新成新材料股份有限公司 | A kind of graphite product and production method |
| CN113372119A (en) * | 2020-04-28 | 2021-09-10 | 吉林炭素有限公司 | Design method for dry material particle size composition in graphite electrode body formula |
-
2006
- 2006-12-31 CN CNA2006101600338A patent/CN101210332A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665957B (en) * | 2009-09-23 | 2011-01-12 | 四川广汉士达炭素股份有限公司 | Anti-abrasion graphitization cathode carbon blocks used for aluminum electrolytic cell and manufacturing method thereof |
| CN107986786A (en) * | 2017-11-24 | 2018-05-04 | 大同新成新材料股份有限公司 | A kind of graphite product and production method |
| CN113372119A (en) * | 2020-04-28 | 2021-09-10 | 吉林炭素有限公司 | Design method for dry material particle size composition in graphite electrode body formula |
| CN113372119B (en) * | 2020-04-28 | 2022-12-30 | 吉林炭素有限公司 | Design method for particle size composition of dry materials in graphite electrode body formula |
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Open date: 20080702 |