CN1014910B - Method for manufacturing natural graphite cathode carbon pieces - Google Patents
Method for manufacturing natural graphite cathode carbon piecesInfo
- Publication number
- CN1014910B CN1014910B CN 89100108 CN89100108A CN1014910B CN 1014910 B CN1014910 B CN 1014910B CN 89100108 CN89100108 CN 89100108 CN 89100108 A CN89100108 A CN 89100108A CN 1014910 B CN1014910 B CN 1014910B
- Authority
- CN
- China
- Prior art keywords
- cathode carbon
- natural graphite
- carbon pieces
- mix
- roasting
- 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.)
- Expired
Links
Landscapes
- Electrolytic Production Of Metals (AREA)
- Ceramic Products (AREA)
Abstract
The present invention relates to a graphite cathode carbon block for an aluminium electrolytic cell and a preparation method thereof. The present invention is mainly characterized in that natural graphite is used as aggregates for producing the cathode carbon block, and the unique part in the method is the preparation of the natural graphite as the aggregates. In products of the present invention, the cathode carbon block does not need to be graphitized, and main technical indexes exceed those of common and half graphite cathode carbon blocks and are approximate to even exceed those of half graphitized cathode carbon blocks. Resources are reasonably used, energy resources is saved, and the cost of aluminium can be reduced in use.
Description
The present invention is a kind of manufacture method of aluminum electrolyzing cell used graphite cathode charcoal piece.
At present, aluminum electrolyzing cell used cathode carbon pieces has four kinds: common hard coal cathode carbon pieces, semi-graphite cathode carbon block, semi-graphited cathode carbon pieces and graphitized cathode carbon block.The aggregate of these four kinds of cathode carbon pieces all is to be made by the refinery coke after hard coal after the calcining or the calcining, and only the calcining temperature of the used aggregate of coal charcoal piece is different with proportioning.The calcination process purpose is to remove the volatile matter and the attached water of hard coal and refinery coke, and the physical and chemical index that changes them makes it to be suitable for producing the requirement of cathode carbon pieces.But consume certain energy; And it is bigger to produce the ratio resistance of going up the cathode carbon pieces of using at present.For this reason, people manage again to improve.Such as, be placed on again behind the cathode charcoal roasting under 2500～3000 ℃ the hot environment and make the carbon crystallization, become greying or semi-graphited.Yet make 2500～3000 ℃ hot environment not a duck soup, make cathode carbon pieces greying or semi-graphited simultaneously in this environment, with power consumption 3000～6000 degree/ton cathode carbon pieces, the electric energy of consumption is bigger.
Use specific technical process, make natural graphite cathode carbon pieces, and make every effort to make the ratio resistance of this kind charcoal piece to decrease than the ratio resistance that has various types of cathode carbon pieces now, the power consumption during with the minimizing electrolysis of aluminum is received comprehensive benefit.Through test of many times, obtained success, the purpose of invention is satisfied.
Now that particular content of the present invention is as follows:
1, the product that the present invention produces is a kind of graphite cathode charcoal piece, and the major ingredient of this graphite cathode charcoal piece is a carbon, also contains a spot of ash and grades, and the aggregate that it is characterized in that graphite cathode charcoal piece is to be formed by the natural graphite processing and fabricating.
2, be that aggregate is made neoteric graphite cathode charcoal piece and needed a whole set of production method with the natural graphite, include in this method: aggregate preparation, batching, mix and operation such as pinch, cool material, moulding, roasting and machine add.
The feature of preparation aggregate operation is as follows:
(1) carbon content (weight percentage) is crushed to 100～200 orders (0.127mm～0.254mm) greater than 80% natural graphite;
(2) percentage ratio is got natural graphite after 30% mid-temperature pitch (measure with ring and ball method, its softening temperature is 65 ℃～75 ℃) and 70% is pulverized by weight, places to mix to pinch that pot is mixed to be pinched 20～50 minutes, and kneading temperature is 130～145 ℃.
(3) will mix thickener after pinching and pack in the cooler or artificial cool material, and make thickener be cooled to 90～110 ℃, thickener will be pressed into living charcoal piece with the above pressing machine of kiloton;
(4) will give birth to the charcoal piece and place 1150～1350 ℃ environment roasting, roasting time is 320～480 hours.Broken roasting charcoal piece promptly can be used as aggregate.
Aggregate can be made the cathode carbon pieces processing method according to routine and produce after obtaining, as:
Mix and pinch.
72～74%(weight percentage) aggregate preheating to 100 ℃ about, stirred 25～30 minutes, add 26～28% middle geothermal liquid pitch (temperature is at 130～140 ℃), then, mix and pinched 20 minutes, make thickener.
Cool material.
The thickener that comes out from kneading machine enters into cooler and carries out the cold material, and cool material temperature is 90 ℃～160 ℃.
Moulding.
Pack into horizontal vibration forming machine or the pressing machine more than the kiloton of 100 ℃ thickener is pressed into living cathode carbon pieces.
Roasting.
Give birth to cathode carbon pieces at open type or formula ring-form calcining furnace with cover through 1150～1350 ℃ of roastings.
Machining makes it to become the product of certain specification.
This invention has been tested enforcement.Natural graphite cathode carbon pieces that produces and the contrast of the physical and chemical index of other like products are as follows:
The physical and chemical index of various cathode carbon pieces
The common hard coal semi-graphite of cathode carbon pieces semi-graphited greying natural graphite
Title cathode carbon pieces cathode carbon pieces cathode carbon pieces cathode carbon pieces cathode carbon pieces
Physical and chemical index
Ash content, (%) ≯ 8 5.63 8.43 0.30 7.81
Cell size, (%) ≯ 23 19.10 25.30 25.10 22
Ultimate compression strength (kg/cm
2) ≮ 300 277 235 252＞300
Than resistance Ω mm
3/ m ≯ 60 44 36 11 25
Damage coefficient ≯ 1.5---0.8
It is identical with preceding method to make the method that natural graphite cathode carbon pieces adopted during enforcement.
From examples of implementation as can be seen, this invention is an aggregate of producing cathode carbon pieces with natural graphite, and the major advantage of its method and product is:
1, the raw material of producing aggregate has saved calcination process, has saved the energy.
2, hard coal or the refinery coke after replacing forging with natural graphite makes resource obtain reasonable utilization.
3, some physical and chemical index (as cell size and ultimate compression strength etc.) of product is better than semi-graphited cathode carbon pieces and graphitized cathode carbon block.Than the low 35 Ω mm of the more common hard coal cathode carbon pieces of resistance
2/ m is than the low 19 Ω mm of semi-graphite cathode carbon block
2/ m.In making processes, need not carry out graphitization processing, save a large amount of electric energy.
4, because this natural graphite cathode carbon pieces is littler than the cell size of widely used common hard coal cathode carbon pieces or semi-graphite cathode carbon block in the daily production, intensity big, lower than resistance, so can prolong the work-ing life of electrolyzer, improve utilization rate of electrical, reduce the production cost of aluminium, received comprehensive economic benefit.
Claims (1)
1, a kind of manufacture method of aluminum electrolyzing cell used graphite cathode charcoal piece, this method include preparation aggregate, batching, mix and operation such as pinch, cool material, moulding, roasting, machine add, and it is characterized in that the operation for preparing aggregate is:
1) carbon content (weight percentage) is crushed to 100～200 orders (0.127mm～0.254mm) greater than 80% natural graphite;
2) percentage ratio is got natural graphite after 30% mid-temperature pitch and 70% is pulverized and is placed to mix and pinch pot and mix and pinched 20～45 minutes by weight, and kneading temperature is 130～145 ℃;
3) will mix thickener after pinching and be encased in and be cooled to 90～110 ℃ in the cooler, be pressed into living charcoal piece with the above pressing machine of kiloton;
4) will give birth to the charcoal piece and place 1150～1350 ℃ environment roasting, roasting time 320～480 hours, broken roasting charcoal piece is made aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100108 CN1014910B (en) | 1989-01-04 | 1989-01-04 | Method for manufacturing natural graphite cathode carbon pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100108 CN1014910B (en) | 1989-01-04 | 1989-01-04 | Method for manufacturing natural graphite cathode carbon pieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043964A CN1043964A (en) | 1990-07-18 |
| CN1014910B true CN1014910B (en) | 1991-11-27 |
Family
ID=4853697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100108 Expired CN1014910B (en) | 1989-01-04 | 1989-01-04 | Method for manufacturing natural graphite cathode carbon pieces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014910B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306949B (en) * | 2008-01-31 | 2011-05-11 | 四川启明星铝业有限责任公司 | Charcoal blocks with semi- graphitic side part for electrolyzing aluminium and production process thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408106A (en) * | 2010-09-17 | 2012-04-11 | 豪亚兴业有限公司 | Method for making porous graphite block by using graphite powder |
| CN103374730A (en) * | 2012-04-28 | 2013-10-30 | 夏华松 | Wettable cathode cylinder with crystal graphite as plastid and production method thereof |
-
1989
- 1989-01-04 CN CN 89100108 patent/CN1014910B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306949B (en) * | 2008-01-31 | 2011-05-11 | 四川启明星铝业有限责任公司 | Charcoal blocks with semi- graphitic side part for electrolyzing aluminium and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043964A (en) | 1990-07-18 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |