CN107268034A - A kind of cathode carbon pieces of suitable phosphorus pig iron casting and preparation method thereof - Google Patents
A kind of cathode carbon pieces of suitable phosphorus pig iron casting and preparation method thereof Download PDFInfo
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- CN107268034A CN107268034A CN201710453458.6A CN201710453458A CN107268034A CN 107268034 A CN107268034 A CN 107268034A CN 201710453458 A CN201710453458 A CN 201710453458A CN 107268034 A CN107268034 A CN 107268034A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
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Abstract
The present invention relates to a kind of cathode carbon pieces of suitable phosphorus pig iron casting and preparation method thereof, belong to cathode carbon pieces technical field.Present invention mainly solves common cathode carbon pieces during using phosphorus pig iron casting, easily there is severe crack and obtain technical problem.The technical scheme is that：A kind of cathode carbon pieces of suitable phosphorus pig iron casting, wherein：The cathode carbon pieces are made up of 80% electric calcined anthracite and 20% binding agent；The size distribution of the electric calcined anthracite is：10 12mm are 0 5%；4 10mm are 12 22%；2 4mm are 20 24%；0.15 2mm is 30 35%；0.075 0.15mm is 18 25%.A kind of preparation method of the cathode carbon pieces of suitable phosphorus pig iron casting, comprises the following steps：1), mix；2) it is, hot-forming；3), it is calcined；4), cool down.Compared with prior art, the present invention has the advantages that shake good performance, High anti bending strength, production efficiency of carbon block heat resistanceheat resistant is high.
Description
Technical field
The invention belongs to cathode carbon pieces technical field, the cathode carbon pieces of more particularly to a kind of suitable phosphorus pig iron casting and
Its preparation method.
Background technology
With the continuous progress of aluminium cell construction technology, cell lining cathode carbon pieces use phosphorus pig iron casting technology
Arise at the historic moment, according to experimental technique data analysis, phosphorus pig iron casting technology can reduce the contact drop 50mv-- of rod iron carbon block
80mv, there is obvious energy-saving effect, and 160kwh can drop in aluminium ton power consumption, and cathode carbon pieces rod iron phosphorus pig iron casting will turn into state from now on
The trend of interior aluminium cell development, has important realistic meaning to the long-run development that aluminium is looked forward to.
However, original common graphite cathode carbon block is due to its relatively backward Recipe and traditional roasting work
Skill is limited, and cathode carbon pieces serious carbon block crack problem occur during using phosphorus pig iron casting, and crackle product accounting is
20%--40%, therefore the product quality of common cathode carbon pieces is much not suitable with the construction requirement of phosphorus pig iron casting technology.
The content of the invention
It is an object of the invention to the shortcoming for overcoming prior art, there is provided a kind of cathode carbon pieces of suitable phosphorus pig iron casting
And preparation method thereof, common cathode carbon pieces are solved during using phosphorus pig iron casting, severe crack easily occur and obtain technology asking
Topic.
The present invention is achieved by the following technical solutions：
A kind of cathode carbon pieces of suitable phosphorus pig iron casting, wherein：The cathode carbon pieces by 80% electric calcined anthracite and
20% binding agent composition；
The size distribution of the electric calcined anthracite is：10-12mm is 0-5%；4-10mm is 12-22%；2-4mm is 20-
24%；0.15-2mm is 30-35%；0.075-0.15mm is 18-25%.
A kind of preparation method of the cathode carbon pieces of suitable phosphorus pig iron casting, comprises the following steps：
1), mix：Electric calcined anthracite and binding agent are well mixed in proportion；
2) it is, hot-forming：Well mixed raw material is placed in forming machine and carries out hot-forming, hot pressing temperature is
140-150 DEG C, pressure be 7500MPa；
3), it is calcined：Hot-forming carbon block is placed on roaster, sequentially passes through and is calcined with the next stage：
First stage：From room temperature to 450 ± 5 DEG C, the heat time is 207h；
Second stage：550 ± 5 DEG C are warming up to from 450 ± 5 DEG C, programming rate is 1.2 DEG C/h, and the heat time is 83h；
Phase III：650 ± 5 DEG C are warming up to from 550 ± 5 DEG C, programming rate is 1.5 DEG C/h, and the heat time is 67h；
Fourth stage：750 ± 5 DEG C are warming up to from 650 ± 5 DEG C, programming rate is 2 DEG C/h, and the heat time is 50h；
5th stage：850 ± 5 DEG C are warming up to from 750 ± 5 DEG C, programming rate is 2.5 DEG C/h, and the heat time is 40h；
6th stage：950 ± 5 DEG C are warming up to from 850 ± 5 DEG C, programming rate is 4 DEG C/h, and the heat time is 25h；
7th stage：1050 ± 5 DEG C are warming up to from 950 ± 5 DEG C, programming rate is 5 DEG C/h, and the heat time is 40h；
8th stage：72h is incubated at a temperature of 1050 ± 5 DEG C；
4), cool down：Room temperature is air-cooled to after being furnace-cooled to 400 DEG C, you can complete to be adapted to the system of the cathode carbon pieces of phosphorus pig iron casting
It is standby.
Adjustment of the invention by matching somebody with somebody to composition of raw materials and sieve classification so that the total purity of powder have dropped 33%, reduce
There is the possibility of crackle in carbon block；The adjustment of Baking profile, improve carbon block heat resistanceheat resistant shake performance and rupture strength, reduce heat
The coefficient of expansion, controls the generation of carbon block crackle, effectively increases the quality and carbon block casting success rate of carbon block.
Compared with prior art, the present invention has shake good performance, High anti bending strength, production efficiency height etc. of carbon block heat resistanceheat resistant excellent
Point.
Embodiment
Below by embodiment, the present invention is described in further detail.
Embodiment 1
A kind of cathode carbon pieces of suitable phosphorus pig iron casting in the present embodiment, wherein：The cathode carbon pieces by 80% electricity
Forge anthracite and 20% binding agent composition；
The size distribution of the electric calcined anthracite is：10-12mm is 1%；4-10mm is 22%；2-4mm is 24%；
0.15-2mm is 35%；0.075-0.15mm is 18%.
A kind of preparation method of the cathode carbon pieces of suitable phosphorus pig iron casting, comprises the following steps：
1), mix：Electric calcined anthracite and binding agent are well mixed in proportion；
2) it is, hot-forming：Well mixed raw material is placed in forming machine and carries out hot-forming, hot pressing temperature is
140-150 DEG C, pressure be 7500MPa；
3), it is calcined：Hot-forming carbon block is placed on roaster, sequentially passes through and is calcined with the next stage：
First stage：From room temperature to 450 ± 5 DEG C, the heat time is 207h；
Second stage：550 ± 5 DEG C are warming up to from 450 ± 5 DEG C, programming rate is 1.2 DEG C/h, and the heat time is 83h；
Phase III：650 ± 5 DEG C are warming up to from 550 ± 5 DEG C, programming rate is 1.5 DEG C/h, and the heat time is 67h；
Fourth stage：750 ± 5 DEG C are warming up to from 650 ± 5 DEG C, programming rate is 2 DEG C/h, and the heat time is 50h；
5th stage：850 ± 5 DEG C are warming up to from 750 ± 5 DEG C, programming rate is 2.5 DEG C/h, and the heat time is 40h；
6th stage：950 ± 5 DEG C are warming up to from 850 ± 5 DEG C, programming rate is 4 DEG C/h, and the heat time is 25h；
7th stage：1050 ± 5 DEG C are warming up to from 950 ± 5 DEG C, programming rate is 5 DEG C/h, and the heat time is 40h；
8th stage：72h is incubated at a temperature of 1050 ± 5 DEG C；
4), cool down：Room temperature is air-cooled to after being furnace-cooled to 400 DEG C, you can complete to be adapted to the system of the cathode carbon pieces of phosphorus pig iron casting
It is standby.
Embodiment 2
A kind of cathode carbon pieces of suitable phosphorus pig iron casting in the present embodiment, wherein：The cathode carbon pieces by 80% electricity
Forge anthracite and 20% binding agent composition；
The size distribution of the electric calcined anthracite is：4-10mm is 22%；2-4mm is 20%；0.15-2mm is 35%；
0.075-0.15mm is 23%.
A kind of preparation method of the cathode carbon pieces of suitable phosphorus pig iron casting, comprises the following steps：
1), mix：Electric calcined anthracite and binding agent are well mixed in proportion；
2) it is, hot-forming：Well mixed raw material is placed in forming machine and carries out hot-forming, hot pressing temperature is
140-150 DEG C, pressure be 7500MPa；
3), it is calcined：Hot-forming carbon block is placed on roaster, sequentially passes through and is calcined with the next stage：
First stage：From room temperature to 450 ± 5 DEG C, the heat time is 207h；
Second stage：550 ± 5 DEG C are warming up to from 450 ± 5 DEG C, programming rate is 1.2 DEG C/h, and the heat time is 83h；
Phase III：650 ± 5 DEG C are warming up to from 550 ± 5 DEG C, programming rate is 1.5 DEG C/h, and the heat time is 67h；
Fourth stage：750 ± 5 DEG C are warming up to from 650 ± 5 DEG C, programming rate is 2 DEG C/h, and the heat time is 50h；
5th stage：850 ± 5 DEG C are warming up to from 750 ± 5 DEG C, programming rate is 2.5 DEG C/h, and the heat time is 40h；
6th stage：950 ± 5 DEG C are warming up to from 850 ± 5 DEG C, programming rate is 4 DEG C/h, and the heat time is 25h；
7th stage：1050 ± 5 DEG C are warming up to from 950 ± 5 DEG C, programming rate is 5 DEG C/h, and the heat time is 40h；
8th stage：72h is incubated at a temperature of 1050 ± 5 DEG C；
4), cool down：Room temperature is air-cooled to after being furnace-cooled to 400 DEG C, you can complete to be adapted to the system of the cathode carbon pieces of phosphorus pig iron casting
It is standby.
Embodiment 3
A kind of cathode carbon pieces of suitable phosphorus pig iron casting in the present embodiment, wherein：The cathode carbon pieces by 80% electricity
Forge anthracite and 20% binding agent composition；
The size distribution of the electric calcined anthracite is：10-12mm is 5%；4-10mm is 12%；2-4mm is 24%；
0.15-2mm is 34%；0.075-0.15mm is 25%.
A kind of preparation method of the cathode carbon pieces of suitable phosphorus pig iron casting, comprises the following steps：
1), mix：Electric calcined anthracite and binding agent are well mixed in proportion；
2) it is, hot-forming：Well mixed raw material is placed in forming machine and carries out hot-forming, hot pressing temperature is
140-150 DEG C, pressure be 7500MPa；
3), it is calcined：Hot-forming carbon block is placed on roaster, sequentially passes through and is calcined with the next stage：
First stage：From room temperature to 450 ± 5 DEG C, the heat time is 207h；
Second stage：550 ± 5 DEG C are warming up to from 450 ± 5 DEG C, programming rate is 1.2 DEG C/h, and the heat time is 83h；
Phase III：650 ± 5 DEG C are warming up to from 550 ± 5 DEG C, programming rate is 1.5 DEG C/h, and the heat time is 67h；
Fourth stage：750 ± 5 DEG C are warming up to from 650 ± 5 DEG C, programming rate is 2 DEG C/h, and the heat time is 50h；
5th stage：850 ± 5 DEG C are warming up to from 750 ± 5 DEG C, programming rate is 2.5 DEG C/h, and the heat time is 40h；
6th stage：950 ± 5 DEG C are warming up to from 850 ± 5 DEG C, programming rate is 4 DEG C/h, and the heat time is 25h；
7th stage：1050 ± 5 DEG C are warming up to from 950 ± 5 DEG C, programming rate is 5 DEG C/h, and the heat time is 40h；
8th stage：72h is incubated at a temperature of 1050 ± 5 DEG C；
4), cool down：Room temperature is air-cooled to after being furnace-cooled to 400 DEG C, you can complete to be adapted to the system of the cathode carbon pieces of phosphorus pig iron casting
It is standby.
Embodiment 4
A kind of cathode carbon pieces of suitable phosphorus pig iron casting in the present embodiment, wherein：The cathode carbon pieces by 80% electricity
Forge anthracite and 20% binding agent composition；
The size distribution of the electric calcined anthracite is：10-12mm is 5%；4-10mm is 16%；2-4mm is 24%；
0.15-2mm is 30%；0.075-0.15mm is 25%.
A kind of preparation method of the cathode carbon pieces of suitable phosphorus pig iron casting, comprises the following steps：
1), mix：Electric calcined anthracite and binding agent are well mixed in proportion；
2) it is, hot-forming：Well mixed raw material is placed in forming machine and carries out hot-forming, hot pressing temperature is
140-150 DEG C, pressure be 7500MPa；
3), it is calcined：Hot-forming carbon block is placed on roaster, sequentially passes through and is calcined with the next stage：
First stage：From room temperature to 450 ± 5 DEG C, the heat time is 207h；
Second stage：550 ± 5 DEG C are warming up to from 450 ± 5 DEG C, programming rate is 1.2 DEG C/h, and the heat time is 83h；
Phase III：650 ± 5 DEG C are warming up to from 550 ± 5 DEG C, programming rate is 1.5 DEG C/h, and the heat time is 67h；
Fourth stage：750 ± 5 DEG C are warming up to from 650 ± 5 DEG C, programming rate is 2 DEG C/h, and the heat time is 50h；
5th stage：850 ± 5 DEG C are warming up to from 750 ± 5 DEG C, programming rate is 2.5 DEG C/h, and the heat time is 40h；
6th stage：950 ± 5 DEG C are warming up to from 850 ± 5 DEG C, programming rate is 4 DEG C/h, and the heat time is 25h；
7th stage：1050 ± 5 DEG C are warming up to from 950 ± 5 DEG C, programming rate is 5 DEG C/h, and the heat time is 40h；
8th stage：72h is incubated at a temperature of 1050 ± 5 DEG C；
4), cool down：Room temperature is air-cooled to after being furnace-cooled to 400 DEG C, you can complete to be adapted to the system of the cathode carbon pieces of phosphorus pig iron casting
It is standby.
The present invention can be embodied without departing from the spiritual or substantive of invention in a variety of forms, it should therefore be appreciated that on
State embodiment and be not limited to foregoing details, and should widely be explained in claim limited range, therefore fall into right
It is required that or the change in its equivalent scope and remodeling all should be claim and covered.
Claims (2)
1. a kind of cathode carbon pieces of suitable phosphorus pig iron casting, it is characterised in that：The cathode carbon pieces by 80% electric calcined anthracite
Binding agent with 20% is constituted；
The size distribution of the electric calcined anthracite is：10-12mm is 0-5%；4-10mm is 12-22%；2-4mm is 20-24%；
0.15-2mm is 30-35%；0.075-0.15mm is 18-25%.
2. a kind of method of the cathode carbon pieces of the suitable phosphorus pig iron casting prepared described in claim 1, it is characterised in that：Including with
Lower step：
1), mix：Electric calcined anthracite and binding agent are well mixed in proportion；
2) it is, hot-forming：Well mixed raw material is placed in forming machine and carries out hot-forming, hot pressing temperature is 140-150
DEG C, pressure be 7500MPa；
3), it is calcined：Hot-forming carbon block is placed on roaster, sequentially passes through and is calcined with the next stage：
First stage：From room temperature to 450 ± 5 DEG C, the heat time is 207h；
Second stage：550 ± 5 DEG C are warming up to from 450 ± 5 DEG C, programming rate is 1.2 DEG C/h, and the heat time is 83h；
Phase III：650 ± 5 DEG C are warming up to from 550 ± 5 DEG C, programming rate is 1.5 DEG C/h, and the heat time is 67h；
Fourth stage：750 ± 5 DEG C are warming up to from 650 ± 5 DEG C, programming rate is 2 DEG C/h, and the heat time is 50h；
5th stage：850 ± 5 DEG C are warming up to from 750 ± 5 DEG C, programming rate is 2.5 DEG C/h, and the heat time is 40h；
6th stage：950 ± 5 DEG C are warming up to from 850 ± 5 DEG C, programming rate is 4 DEG C/h, and the heat time is 25h；
7th stage：1050 ± 5 DEG C are warming up to from 950 ± 5 DEG C, programming rate is 5 DEG C/h, and the heat time is 40h；
8th stage：72h is incubated at a temperature of 1050 ± 5 DEG C；
4), cool down：Room temperature is air-cooled to after being furnace-cooled to 400 DEG C, you can complete to be adapted to the preparation of the cathode carbon pieces of phosphorus pig iron casting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457383A (en) * | 2022-02-28 | 2022-05-10 | 山西亮宇炭素有限公司 | Cathode tamping paste for environment-friendly aluminum electrolysis cell |
| CN116589292A (en) * | 2023-06-02 | 2023-08-15 | 平罗县中兴碳素有限公司 | Preparation method of high-conductivity cold ramming steel bar paste for aluminum electrolysis cell |
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| CN102995057A (en) * | 2012-12-05 | 2013-03-27 | 中电投宁夏青铜峡能源铝业集团有限公司 | Cathode carbon block with planar surface or V-shaped surface and staggered carbon bowls and preparation method |
| CN104649263A (en) * | 2015-03-06 | 2015-05-27 | 山西亮宇炭素有限公司 | Preparation method of carbon-graphite composite material |
| CN105420758A (en) * | 2015-12-01 | 2016-03-23 | 宁夏宁平炭素有限责任公司 | Preparing method for whole-coal carbon block cathodes |
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2017
- 2017-06-15 CN CN201710453458.6A patent/CN107268034A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3975144A (en) * | 1975-03-11 | 1976-08-17 | Reynolds Metals Company | Cathode baking system |
| CN1480562A (en) * | 2003-08-04 | 2004-03-10 | 青铜峡市青鑫炭素有限责任公司 | High graphite cathode carbon block and its producing method |
| CN102011147A (en) * | 2010-12-03 | 2011-04-13 | 伊川龙海科技实业有限公司 | Method for producing carbon electrodes by floating carbon powder and coal tar pitch with spent potlining (SPL) of aluminium electrolysis |
| CN102995057A (en) * | 2012-12-05 | 2013-03-27 | 中电投宁夏青铜峡能源铝业集团有限公司 | Cathode carbon block with planar surface or V-shaped surface and staggered carbon bowls and preparation method |
| CN104649263A (en) * | 2015-03-06 | 2015-05-27 | 山西亮宇炭素有限公司 | Preparation method of carbon-graphite composite material |
| CN105420758A (en) * | 2015-12-01 | 2016-03-23 | 宁夏宁平炭素有限责任公司 | Preparing method for whole-coal carbon block cathodes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457383A (en) * | 2022-02-28 | 2022-05-10 | 山西亮宇炭素有限公司 | Cathode tamping paste for environment-friendly aluminum electrolysis cell |
| CN114457383B (en) * | 2022-02-28 | 2023-05-23 | 山西亮宇炭素有限公司 | Cathode tamping paste for environment-friendly aluminum electrolysis cell |
| CN116589292A (en) * | 2023-06-02 | 2023-08-15 | 平罗县中兴碳素有限公司 | Preparation method of high-conductivity cold ramming steel bar paste for aluminum electrolysis cell |
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Application publication date: 20171020 |