CN102443733B - Phosphorus pig iron for improving conducting performance of graphite cathode carbon block - Google Patents
Phosphorus pig iron for improving conducting performance of graphite cathode carbon block Download PDFInfo
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- CN102443733B CN102443733B CN 201110408608 CN201110408608A CN102443733B CN 102443733 B CN102443733 B CN 102443733B CN 201110408608 CN201110408608 CN 201110408608 CN 201110408608 A CN201110408608 A CN 201110408608A CN 102443733 B CN102443733 B CN 102443733B
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Abstract
The invention discloses phosphorus pig iron for improving the conducting performance of a graphite cathode carbon block. The formula of phosphorus pig iron casting material comprises the following components of 3.3+/-0.2 percent of C, 2.2+/-0.2 percent of Si, 1.0+/-0.2 percent of Mn, 1.0+/-0.2 percent of P, less than or equal to 0.05 percent of S and the balance iron, wherein the tapping temperature of the phosphorus pig iron casting material is 1400-1480DEG C; before casting, the pre-prepared alloy elements are added, so that the alloy elements comprise the following components of: 0.02-0.04 percent of Ni, 0.03-0.04 percent of Cr, 0.04-0.05 percent of V, 0.08-0.12 percent of Cu and 0.15-0.18 percent of Ti. The phosphorus pig iron has casting performances such as favorable flowability, proper contractibility and the like as well as favorable conductivity. In the aluminum electrolysis process, the internal stress of the cathode carbon block can be basically kept in a balanced state; the iron carbon pressure drop can be kept at a lower pressure drop value; and the direct current power consumption of tons of aluminum is effectively improved.
Description
Technical field
[0001] the present invention relates to technical field of aluminum electrolysis, particularly a kind of phosphorus pig iron that improves aluminum electrolyzing cell used graphite cathode carbon block conductivity.
Background technology
[0002] traditional cathode carbon block for aluminium electrolysis phosphorus pig iron, the graphite cathode carbon block iron charcoal pressure drop that composition makes casting because its casting material is filled a prescription is more than 30mV, and efficiency is low, average utilising efficiency less than 50%.
[0003] be further to reduce the pressure drop of iron charcoal, the present invention researchs and develops out the New Phosphorus pig iron of energy Effective Raise conductivity.
[0004] technology contents
The purpose of this invention is to provide a kind of phosphorus pig iron that can carry the cloudy charcoal piece of high graphite utmost point conductivity.
[0005] technical scheme of the present invention is: the prescription of graphite cathode carbon block phosphorus pig iron casting material is: C3.3 ± 0.2, Si2.2 ± 0.2, Mn1.0 ± 0.2, P1.0 ± 0.2, S≤0.05, all the other compositions are iron, phosphorus pig iron casting material tapping temperature is 1400 ℃-1480 ℃, before casting, add the alloying element that configures in advance, make the molten iron alloy element component at following scope: Ni0.02-0.04, Cr0.03-0.04, V0.04-0.05, Cu0.08-0.12, Ti0.15-0.18.
[0006], two kinds of elements of Cr have susceptibility to the phosphorus pig iron coefficient of expansion.With the increase of Cr, Ni constituent content, the alloy coefficient of expansion also increases.The Ni element has the low-temperature-sensitive perception, and larger on coefficient of expansion impact below 400 ℃, the Cr element has sensitive, and is larger on coefficient of expansion impact more than 400 ℃.The increase of Cu content, the linear expansivity of the phosphorus pig iron reduces.V, Ti have obvious anti-graphitizing, can play the good dies refinement, effectively reduce resistivity, improve the effect of cathode carbon pieces conductivity.
[0007], five kinds of alloys trace elements of Cr, V, Cu, Ti reasonable disposition, be the castabilitys such as shrinkability that keep suitable, guarantee that graphite matter charcoal piece casting forming effect reaches optimum regime, the pressure drop of iron charcoal can keep more low pressure depreciation.
[0008] this phosphorus pig iron has outside good fluidity and the suitable castabilitys such as shrinkability, has satisfactory electrical conductivity.Be mainly used in the graphite cathode carbon block casting, when can keep good the shaping, the charcoal piece is in tensile stress state under the normal temperature, and the pressure drop of iron charcoal can remain on below the 25mV.In the aluminium electrolysis process, cathode carbon pieces self internal stress can keep an equilibrium state substantially, and the pressure drop of iron charcoal can remain on a more low pressure depreciation, Effective Raise the ton aluminum direct current consumes.
Embodiment
[0009] embodiment 1:
Graphite cathode carbon block phosphorus pig iron casting material formula is C3.3 ± 0.2, Si2.2 ± 0.2, Mn1.0 ± 0.2, P1.0 ± 0.2, S≤0.05, all the other compositions are iron, temperature when phosphorus pig iron casting material is come out of the stove from intermediate frequency furnace is 1400 ℃, phosphorus molten pig iron enters in the casting ladle before casting, adds the alloying element that configures in advance, makes phosphorus pig iron casting material alloy element component be: Ni0.02, Cr0.03, V0.04, Cu0.08, Ti0.15.
Embodiment 2:
Graphite cathode carbon block phosphorus pig iron casting material formula is C3.3 ± 0.2, Si2.2 ± 0.2, Mn1.0 ± 0.2, P1.0 ± 0.2, S≤0.05, all the other compositions are iron, temperature when phosphorus pig iron casting material is come out of the stove from intermediate frequency furnace is 1450 ℃, phosphorus molten pig iron enters in the casting ladle before casting, adds the alloying element that configures in advance, makes phosphorus pig iron casting material alloy element component be: Ni0.04, Cr0.04, V0.05, Cu0.12, Ti0.18.
[0010] embodiment 3:
Graphite cathode carbon block phosphorus pig iron casting material formula is C3.3 ± 0.2, Si2.2 ± 0.2, Mn1.0 ± 0.2, P1.0 ± 0.2, S≤0.05, all the other compositions are iron, temperature when phosphorus pig iron casting material is come out of the stove from intermediate frequency furnace is 1480 ℃, phosphorus molten pig iron enters in the casting ladle before casting, adds the alloying element that configures in advance, makes phosphorus pig iron casting material alloy element component be: Ni0.03, Cr0.35, V0.45, Cu0.1, Ti0.17.
Claims (1)
1. phosphorus pig iron that improves the graphite cathode carbon block conductivity, the prescription that it is characterized in that phosphorus pig iron casting material is: C3.3 ± 0.2, Si2.2 ± 0.2, Mn1.0 ± 0.2, P1.0 ± 0.2, S≤0.05, all the other compositions are iron, phosphorus pig iron casting material tapping temperature is 1400 ℃-1480 ℃, before casting, add the alloying element that configures in advance, make the molten iron alloy element component at following scope: Ni0.02-0.04, Cr0.03-0.04, V0.04-0.05, Cu0.08-0.12, Ti0.15-0.18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110408608 CN102443733B (en) | 2011-12-09 | 2011-12-09 | Phosphorus pig iron for improving conducting performance of graphite cathode carbon block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110408608 CN102443733B (en) | 2011-12-09 | 2011-12-09 | Phosphorus pig iron for improving conducting performance of graphite cathode carbon block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102443733A CN102443733A (en) | 2012-05-09 |
| CN102443733B true CN102443733B (en) | 2013-01-23 |
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| CN 201110408608 Active CN102443733B (en) | 2011-12-09 | 2011-12-09 | Phosphorus pig iron for improving conducting performance of graphite cathode carbon block |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048876A (en) * | 2017-12-04 | 2018-05-18 | 王明 | Dedicated hematite iron of aluminium electrolysis anode and preparation method and application |
| CN108060431B (en) * | 2017-12-05 | 2019-07-30 | 聊城信源集团有限公司 | A kind of method of 50% high graphite cathode carbon block and cathode steel bar assembling |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60247037A (en) * | 1984-05-22 | 1985-12-06 | Mitsui Eng & Shipbuild Co Ltd | Cv-cast iron cylinder liner |
| CN1111610C (en) * | 1999-04-30 | 2003-06-18 | 中国铝业股份有限公司 | Phosphorous pig iron for assembling anode for electrolysis of aluminium |
| CN1974819A (en) * | 2006-12-08 | 2007-06-06 | 中国铝业股份有限公司 | Phosphorus-containing pig iron for electrolyzing aluminium |
| CN101397643B (en) * | 2008-09-23 | 2011-03-23 | 兰州连城陇兴铝业有限责任公司 | Novel phosphorus and sulphur pig iron for aluminum electrolysis |
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Effective date of registration: 20180621 Address after: 654300 Sheep Street New Industrial Park, Jianshui County, Honghe Hani and Yi Autonomous Prefecture, Yunnan Patentee after: Yunnan Yunnan Aluminum green source Hui Bang Engineering Technology Co., Ltd. Address before: 650000 Chenggong, Kunming, Yunnan Patentee before: Yunnan Aluminium Co., Ltd. |