CN1400334A - Large-type aluminium electrolyzer cathode carbon block - Google Patents
Large-type aluminium electrolyzer cathode carbon block Download PDFInfo
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- CN1400334A CN1400334A CN 02141830 CN02141830A CN1400334A CN 1400334 A CN1400334 A CN 1400334A CN 02141830 CN02141830 CN 02141830 CN 02141830 A CN02141830 A CN 02141830A CN 1400334 A CN1400334 A CN 1400334A
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Abstract
The large-size aluminium cell cathode carbon block is characterized by that its adopted raw material and ratios are as follows: calcined petroleum coke (including delayed coke, needle coke or graphitized delayed coke) 40-70%, broken calcines 5-30%, broken graphite 5-25% and modified asphalt 14-23%. Said invented cathode carbon block is used in aluminium cell, anti-corrosive and its service life is long, and its cost is low.
Description
Technical field
The present invention relates to a kind of large-scale aluminium electrolysis groove cathode carbon block.
Background technology
In the production process of electrolysis of aluminum, cathode block is among ice crystal-alumina molten salt electrolysis matter, bearing the complex reaction resultant of high temperature, ionogen and electrolytic process, the effect of electromagnetic field, thermal shocking in addition, so the breakage of the cathode block of aluminium cell is very serious; The damaged form of common aluminium electrolysis cell cathode carbon block liner generally has following several: furnace bottom protuberance, cathode block form the erosion hole, the cathode block layer is peeled off, pricked seam and sticks with paste aliquation, perforation, longitudinal fracture and sidewall carbon brick breakage.Impelling the damaged reason for corrosion of aluminium electrolysis cell cathode carbon block mainly is the following aspects: 1, the expansion of cathode material and contraction; 2, sodium ion is to the intrusion of cathode block liner; 3, ionogen and aluminium water infiltration; 4, electrochemistry or chemical corrosion; 5, atmospheric oxidation; 6, the quality of inner lining material; 7, inside lining building quality; 8, electrolyzer preheating, starting, operation, managerial reason.Therefore how to solve the damaging problem of aluminium electrolysis cell cathode carbon block, become a great problem of this area research, use now with hard coal, metallurgical coke cathode block as raw material, exist not corrosion-resistant, work-ing life is short, produce and the higher shortcoming of use cost, and cause aluminium cell shortening in work-ing life; And after-smithing petroleum coke, graphite is broken and the roasting fragility can be good, fail to be applied to the making of cathode block so far, has both caused a kind of waste of raw material, also environmental protection is exerted an influence.
Summary of the invention
Shortcoming at above-mentioned prior art exists the invention provides a kind of large-scale aluminium electrolysis groove cathode carbon block.
The technical solution used in the present invention is: a kind of large-scale aluminium electrolysis groove cathode carbon block is characterized in that: raw material type and ratio that it adopts are:
After-smithing petroleum coke (comprising delay coke, needle coke or greying delay coke) 40-70%, the broken 5-30% of roasting, the broken 5-25% of graphite, modified pitch (softening temperature 90-115 ℃) 14-23%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤10% 8-15% 12-20% 10-16% 30-50%
+ 12
MmBe granularity 〉=12
Mm,-12+8
MmBe granularity＜12 ∽〉8
Mm,-8+4
MmBe granularity＜8 ∽〉4
Mm,-4+2
MmBe granularity＜4 ∽〉2
Mm,-2+0
MmIt is granularity＜2 ∽＞0
Mm,-0.075
MmIt is granularity＜0.075
Mm,
A kind of preferable raw material type and ratio that it adopts are:
Forge back delay coke 53%, roasting is broken 20%, and graphite is broken 10%, modified pitch 17%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤3% 10 ± 1% 16 ± 1% 12 ± 1% 40 ± 1%
Another kind of preferable raw material type and ratio that it adopts are: forge back delay coke 50%, roasting is broken 22%, and graphite is broken 10%, modified pitch 18%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤1% 9 ± 1% 17 ± 1% 13 ± 1% 45 ± 1%
Another preferable raw material type and ratio that it adopts are: forge the back mix burnt (graphite Jiao: delay coke=1: 4) 50%, roasting is broken 25%, graphite is broken 7%, modified pitch 18%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤2% 10 ± 1% 14 ± 1% 10 ± 1% 43 ± 1%
Cathode block of the present invention is applied to aluminium cell, and is corrosion-resistant, and long service life therefore by the present invention, has reduced production cost and use cost, has improved economic benefit, has also saved starting material, has reduced environmental pollution.
Embodiment
The present invention is described in further detail below in conjunction with specific embodiment.
The manufacture craft of making the large-scale aluminium electrolysis groove cathode carbon block belongs to known technology, does not repeat them here.
Embodiment 1
Raw material type and ratio that the large-scale aluminium electrolysis groove cathode carbon block adopts:
After-smithing petroleum coke 53%, roasting is broken 20%, and graphite is broken 10%, modified pitch 17%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤3% 10 ± 1% 16 ± 1% 12 ± 1% 40 ± 1%
The batching of above-mentioned raw materials ratio, size composition is made cathode block by following technology.
Batching → mix pinching → moulding → roasting → or greying → machining → finished product.
Embodiment 2
Raw material type and ratio that the large-scale aluminium electrolysis groove cathode carbon block adopts:
Forge back delay coke 50%, roasting is broken 22%, and graphite is broken 10%, modified pitch 18%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤1% 9 ± 1% 17 ± 1% 13 ± 1% 45 ± 1%
The batching of above-mentioned raw materials ratio, size composition is made cathode block by following technology.
Batching → mix pinching → moulding → roasting → or greying → machining → finished product.
Embodiment 3
Raw material type and ratio that the large-scale aluminium electrolysis groove cathode carbon block adopts:
Forge the back mix burnt (graphite Jiao: delay coke=1: 4) 50%, roasting is broken 25%, graphite is broken 7%, modified pitch 18%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤2% 10 ± 1% 14 ± 1% 10 ± 1% 43 ± 1%
The batching of above-mentioned raw materials ratio, size composition is made cathode block by following technology.
Batching → mix pinching → moulding → roasting → or greying → machining → finished product.
Being preferred embodiment of the present invention in sum, is not to be used to limit practical range of the present invention, and the equivalent technologies that every technical conceive of the present invention is done is replaced, and all belongs to protection scope of the present invention.
Claims (8)
1, plant the large-scale aluminium electrolysis groove cathode carbon block, it is characterized in that: raw material type and ratio that it adopts are:
After-smithing petroleum coke (comprising delay coke, needle coke or greying delay coke) 40-70%, the broken 5-30% of roasting, the broken 5-25% of graphite, modified pitch 14-23%.
2, large-scale aluminium electrolysis groove cathode carbon block as claimed in claim 1 is characterized in that: after-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity that adopts during making is:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
3, large-scale aluminium electrolysis groove cathode carbon block as claimed in claim 2, it is characterized in that: the proportion of composing of above-mentioned dried raw material granularity is:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤10% 8-15% 12-20% 10-16% 30-50%
4, large-scale aluminium electrolysis groove cathode carbon block as claimed in claim 1 is characterized in that: a kind of preferable raw material type and ratio that it adopts are:
Forge back delay coke 53%, roasting is broken 20%, and graphite is broken 10%, modified pitch 17%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤3% 10 ± 1% 16 ± 1% 12 ± 1% 40 ± 1%
5, large-scale aluminium electrolysis groove cathode carbon block as claimed in claim 1 is characterized in that: another kind of preferable raw material type and ratio that it adopts are: forge back delay coke 50%, roasting is broken 22%, and graphite is broken 10%, modified pitch 18%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤1% 9 ± 1% 17 ± 1% 13 ± 1% 45 ± 1%
6, large-scale aluminium electrolysis groove cathode carbon block as claimed in claim 1 is characterized in that: another preferable raw material type and ratio that it adopts are: forge the back and mix burntly 50%, roasting is broken 25%, and graphite is broken 7%, modified pitch 18%;
After-smithing petroleum coke, the roasting of aforementioned proportion is broken, the dried raw material of the broken composition of graphite; The dried raw material granularity and the ratio that adopt during making are:
Granularity :+12
Mm-12+8
Mm-8+4
Mm-4+2
Mm-2+0
Mm-0.075
Mm
Proportion of composing :≤2% 10 ± 1% 14 ± 1% 10 ± 1% 43 ± 1%
7, large-scale aluminium electrolysis groove cathode carbon block as claimed in claim 6 is characterized in that: burnt mixing Jiao for graphite Jiao and delay coke is mixed in the above-mentioned back of forging, and its ratio is: graphite Jiao: delay coke=1: 4.
8, as claim 1 or 4 or 5 or 6 described large-scale aluminium electrolysis groove cathode carbon blocks, it is characterized in that: above-mentioned modified pitch employing softening temperature is 90-115 ℃ a modified pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141830 CN1400334A (en) | 2002-08-22 | 2002-08-22 | Large-type aluminium electrolyzer cathode carbon block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141830 CN1400334A (en) | 2002-08-22 | 2002-08-22 | Large-type aluminium electrolyzer cathode carbon block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1400334A true CN1400334A (en) | 2003-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02141830 Pending CN1400334A (en) | 2002-08-22 | 2002-08-22 | Large-type aluminium electrolyzer cathode carbon block |
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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 |
| CN101949034A (en) * | 2010-09-30 | 2011-01-19 | 广西强强碳素股份有限公司 | Cathode graphitizing current stop block for aluminum electrolysis |
| CN105668553A (en) * | 2015-12-31 | 2016-06-15 | 平顶山东方碳素股份有限公司 | Process of preparing high-strength carbon material from waste materials |
| CN111621813A (en) * | 2020-07-06 | 2020-09-04 | 山西三晋碳素股份有限公司 | Cathode carbon block material for aluminum electrolysis |
-
2002
- 2002-08-22 CN CN 02141830 patent/CN1400334A/en active Pending
Cited By (5)
| 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 |
| CN101949034A (en) * | 2010-09-30 | 2011-01-19 | 广西强强碳素股份有限公司 | Cathode graphitizing current stop block for aluminum electrolysis |
| CN105668553A (en) * | 2015-12-31 | 2016-06-15 | 平顶山东方碳素股份有限公司 | Process of preparing high-strength carbon material from waste materials |
| CN105668553B (en) * | 2015-12-31 | 2017-10-10 | 平顶山东方碳素股份有限公司 | The technique for preparing high-strength carbon material using waste material |
| CN111621813A (en) * | 2020-07-06 | 2020-09-04 | 山西三晋碳素股份有限公司 | Cathode carbon block material for aluminum electrolysis |
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