CN104928717A - Tamping paste for aluminum cell - Google Patents
Tamping paste for aluminum cell Download PDFInfo
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- CN104928717A CN104928717A CN201510336297.3A CN201510336297A CN104928717A CN 104928717 A CN104928717 A CN 104928717A CN 201510336297 A CN201510336297 A CN 201510336297A CN 104928717 A CN104928717 A CN 104928717A
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- powder
- paste
- mixture
- ramming paste
- pitch
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Discharge Heating (AREA)
Abstract
The invention relates to tamping paste for an aluminum cell. The tamping paste comprises, 10%-40% of binding materials, 30%-70% of electric conduction aggregate and 5%-40% of annexing agents; the binding materials are a mixture of 5%-20% of pitch and 5%-20% of diluent naphtha; the electric conduction aggregate is a mixture of 10%-30% of smashed residual anodes, 10%-30% of calcined coke and 10%-30% of crystalline flake graphite; the annexing agents are a mixture of any one or more of BPO4 powder, TiF3 powder, ZrF4 powder, TiB2 powder, Al2O3 powder, B2O3 powder and SiO2 powder. Compared with the correlation technique, the tamping paste has the advantages that the paste can be used at the normal temperature like 30 DEG C, the high expansion index and the good corrosion resistance are achieved, and the contact voltage drop between a cathode steel rod and a cathode carbon block can be substantially reduced.
Description
[technical field]
The invention belongs to cell technologies field, particularly relate to a kind of aluminum electrolyzing cell used ramming paste.
[background technology]
In prebaked cell for aluminum-reduction, negative electrode is made up of aluminium liquid, cathode carbon pieces and cathode steel bar, fills cathode steel bar and sticks with paste, rise and connect electric action between cathode carbon pieces and cathode steel bar.The airtight quality of ramming paste determines the damaged speed of electrolytic bath and cathode drop to a great extent.In correlation technique, adopt carbon element ramming paste as the filler between rod iron and cathode carbon pieces.Ramming paste is divided into heat to smash sticking with paste and coldly smash paste.Ramming paste construction temperature is generally more than 100 DEG C, and under comparatively high temps, thickener volatilizes a large amount of toxic gas, serious environment pollution.Cold paste of smashing has easy construction, Environmental Safety, saving equipment and factory building investment, saves energy and the plurality of advantages such as artificial and is subject to the favor of increasing enterprise.The deficiency of correlation technique is, during electrobath start roasting, cold ramming paste is from normal temperature to nearly 900 DEG C of high temperature, at high temperature pyrogenic reaction occurs, carbon is smash body and is experienced first expansion post shrinkage process, there is larger gap between cathode carbon pieces and rod iron, make the contact drop of cathode carbon pieces and rod iron up to more than 120mV, add bath voltage, reduce energy efficiency, also considerable influence is produced to cell life simultaneously.
Therefore, be necessary to provide a kind of aluminum electrolyzing cell used ramming paste newly to solve the problems of the technologies described above in fact.
[summary of the invention]
The technical issues that need to address of the present invention are to provide a kind ofly has high exponent of expansion, good erosion resistance, significantly can reduce the aluminum electrolyzing cell used ramming paste of the contact drop between cathode steel bar and cathode carbon pieces.
A kind of aluminum electrolyzing cell used ramming paste of the present invention, composition and the percentage composition thereof of described aluminum electrolyzing cell used ramming paste are:
Caking agent: 10-40%;
Conduction aggregate: 30-70%;
Additive: 5-40%;
Described bonding dosage is the mixture of the pitch of 5-20% and the diluent naphtha of 5-20%;
Described conduction aggregate is the broken anode scrap of 10-30%, the mixture of 10-30% calcined coke and 10-30% crystalline flake graphite;
Described additive is any one or multiple mixture in BPO4 powder, TiF3 powder, ZrF4 powder, TiB2 powder, Al2O3 powder, B2O3 powder, SiO2 powder.
Compared with correlation technique, beneficial effect of the present invention is: this kind of thickener at normal temperatures, such as, can use under 30 DEG C of conditions, have high exponent of expansion, good erosion resistance, significantly can reduce the contact drop between cathode steel bar and cathode carbon pieces.
[embodiment]
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
A kind of aluminum electrolyzing cell used ramming paste, composition and the percentage composition thereof of described aluminum electrolyzing cell used ramming paste are: broken anode scrap 30%, calcined coke 30%, crystalline flake graphite 10%, pitch 5%, petroleum naphtha 5%, TiF
3powder 4%, ZrF
4powder 5%, Al
2o
3powder 1%, B
2o
3powder 5%, SiO
2powder 2%, BPO
43%.
Above-mentioned solid materials (except pitch and petroleum naphtha) is prepared powder mixture material according to weight ratio Homogeneous phase mixing; Above-mentioned pitch and petroleum naphtha are prepared liquid adhesive according to weight ratio Homogeneous phase mixing.By powder mixture material and liquid adhesive Homogeneous phase mixing 30 minutes under 100 DEG C of conditions, complete ramming paste preparation.
Testing performance index result carried out to the ramming paste of preparation as follows: make density=1.66g/cm firm by ramming
3, resistivity=61 μ Ω m, the coefficient of expansion=(4.45) 10
-6/ DEG C, room temperature thermal conductivity=5.6W/m DEG C, 900 DEG C of shrinking percentage=0.21%.
Embodiment 2
A kind of aluminum electrolyzing cell used ramming paste, composition and the percentage composition thereof of described aluminum electrolyzing cell used ramming paste are: broken anode scrap 10%, calcined coke 10%, crystalline flake graphite 30%, pitch 20%, petroleum naphtha 20%, TiF
3powder 2%, ZrF
4powder 1%, Al
2o
3powder 2%, B
2o
3powder 3%, SiO
2powder 1%, BPO
41%.
Above-mentioned solid materials (except pitch and petroleum naphtha) is prepared powder mixture material according to weight ratio Homogeneous phase mixing; Above-mentioned pitch and petroleum naphtha are prepared liquid adhesive according to weight ratio Homogeneous phase mixing.By powder mixture material and liquid adhesive Homogeneous phase mixing 30 minutes under 100 DEG C of conditions, complete ramming paste preparation.
Testing performance index result carried out to the ramming paste of preparation as follows: make density=1.69g/cm firm by ramming
3, resistivity=57 μ Ω m, the coefficient of expansion=(4.58) 10
-6/ DEG C, room temperature thermal conductivity=5.5W/m DEG C, 900 DEG C of shrinking percentage=0.11%.
Embodiment 3
A kind of aluminum electrolyzing cell used ramming paste, composition and the percentage composition thereof of described aluminum electrolyzing cell used ramming paste are: broken anode scrap 20%, calcined coke 20%, crystalline flake graphite 20%, pitch 12.5%, petroleum naphtha 12.5%, TiF
3powder 5%, ZrF
4powder 5%, B
2o
3powder 3%, BPO
42%.
Above-mentioned solid materials (except pitch and petroleum naphtha) is prepared powder mixture material according to weight ratio Homogeneous phase mixing; Above-mentioned pitch and petroleum naphtha are prepared liquid adhesive according to weight ratio Homogeneous phase mixing.By powder mixture material and liquid adhesive Homogeneous phase mixing 30 minutes under 100 DEG C of conditions, complete ramming paste preparation.
Testing performance index result carried out to the ramming paste of preparation as follows: make density=1.69g/cm firm by ramming
3, resistivity=55 μ Ω m, the coefficient of expansion=(4.59) 10
-6/ DEG C, room temperature thermal conductivity=5.5W/m DEG C, 900 DEG C of shrinking percentage=0.10%.
Embodiment 4
A kind of aluminum electrolyzing cell used ramming paste, composition and the percentage composition thereof of described aluminum electrolyzing cell used ramming paste are: broken anode scrap 20%, calcined coke 20%, crystalline flake graphite 20%, pitch 12.5%, petroleum naphtha 12.5%, Al
2o
3powder 5%, B
2o
3powder 5%, SiO
2powder 5%.
Above-mentioned solid materials (except pitch and petroleum naphtha) is prepared powder mixture material according to weight ratio Homogeneous phase mixing; Above-mentioned pitch and petroleum naphtha are prepared liquid adhesive according to weight ratio Homogeneous phase mixing.By powder mixture material and liquid adhesive Homogeneous phase mixing 30 minutes under 100 DEG C of conditions, complete ramming paste preparation.
Testing performance index result carried out to the ramming paste of preparation as follows: make density=1.69g/cm firm by ramming
3, resistivity=65 μ Ω m, the coefficient of expansion=(4.63) 10
-6/ DEG C, room temperature thermal conductivity=5.7W/m DEG C, 900 DEG C of shrinking percentage=0.13%.
Compared with correlation technique, beneficial effect of the present invention is: this kind of thickener at normal temperatures, such as, can use under 30 DEG C of conditions, have high exponent of expansion, good erosion resistance, significantly can reduce the contact drop between cathode steel bar and cathode carbon pieces.
Above-described is only embodiments of the present invention, it should be pointed out that for the person of ordinary skill of the art at this, without departing from the concept of the premise of the invention, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (1)
1. an aluminum electrolyzing cell used ramming paste, is characterized in that, composition and the percentage composition thereof of described aluminum electrolyzing cell used ramming paste are:
Caking agent: 10-40%;
Conduction aggregate: 30-70%;
Additive: 5-40%;
Described bonding dosage is the mixture of the pitch of 5-20% and the diluent naphtha of 5-20%;
Described conduction aggregate is the broken anode scrap of 10-30%, the mixture of 10-30% calcined coke and 10-30% crystalline flake graphite;
Described additive is any one or multiple mixture in BPO4 powder, TiF3 powder, ZrF4 powder, TiB2 powder, Al2O3 powder, B2O3 powder, SiO2 powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510336297.3A CN104928717A (en) | 2015-06-17 | 2015-06-17 | Tamping paste for aluminum cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510336297.3A CN104928717A (en) | 2015-06-17 | 2015-06-17 | Tamping paste for aluminum cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104928717A true CN104928717A (en) | 2015-09-23 |
Family
ID=54116135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510336297.3A Pending CN104928717A (en) | 2015-06-17 | 2015-06-17 | Tamping paste for aluminum cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104928717A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347824A (en) * | 2015-11-19 | 2016-02-24 | 湖南祯晟炭素实业有限公司 | Preparation method of cold ramming paste specially used for submerged arc furnace whole furnace construction |
| CN105350019A (en) * | 2015-12-08 | 2016-02-24 | 贵州师范大学 | Micro-expansion low-shrinkage carbon block paste used for aluminum electrolysis of silicon-contained additives and preparation method of carbon block paste |
| CN106085320A (en) * | 2016-06-16 | 2016-11-09 | 宜兴新威利成耐火材料有限公司 | Aluminum electrolyzing cell used composite brick bonding agent and preparation method thereof |
| CN106435644A (en) * | 2016-12-05 | 2017-02-22 | 中南大学 | Tamping paste for aluminum electrolytic cell and use method of tamping paste |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147028A (en) * | 1996-06-20 | 1997-04-09 | 崔学理 | Expansion cathode paste |
| US5961811A (en) * | 1997-10-02 | 1999-10-05 | Emec Consultants | Potlining to enhance cell performance in aluminum production |
| US6258224B1 (en) * | 1998-12-16 | 2001-07-10 | Alcan International Limited | Multi-layer cathode structures |
| CN1546428A (en) * | 2003-12-17 | 2004-11-17 | 中国铝业股份有限公司 | Wettable cathode paste and its using method |
| CN1762902A (en) * | 2005-09-12 | 2006-04-26 | 山东八三特种耐火材料厂 | Composite sludge for aluminum electrolytic cell and its preparation method |
| CN1788109A (en) * | 2003-03-12 | 2006-06-14 | 艾尔坎国际有限公司 | High swelling ramming paste for aluminum electrolysis cell |
| CN1880510A (en) * | 2005-02-27 | 2006-12-20 | 高德金 | Dedicated filling paste for cathode carbon block slot in aluminium cell |
| CN102010202A (en) * | 2010-12-10 | 2011-04-13 | 昆明冶金研究院 | Method for preparing cold ramming paste for electrolytic aluminum |
| CN103449401A (en) * | 2013-08-15 | 2013-12-18 | 河南科技大学 | Preparation method of high-graphite cold ramming paste |
-
2015
- 2015-06-17 CN CN201510336297.3A patent/CN104928717A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147028A (en) * | 1996-06-20 | 1997-04-09 | 崔学理 | Expansion cathode paste |
| US5961811A (en) * | 1997-10-02 | 1999-10-05 | Emec Consultants | Potlining to enhance cell performance in aluminum production |
| US6258224B1 (en) * | 1998-12-16 | 2001-07-10 | Alcan International Limited | Multi-layer cathode structures |
| CN1788109A (en) * | 2003-03-12 | 2006-06-14 | 艾尔坎国际有限公司 | High swelling ramming paste for aluminum electrolysis cell |
| CN1546428A (en) * | 2003-12-17 | 2004-11-17 | 中国铝业股份有限公司 | Wettable cathode paste and its using method |
| CN1880510A (en) * | 2005-02-27 | 2006-12-20 | 高德金 | Dedicated filling paste for cathode carbon block slot in aluminium cell |
| CN1762902A (en) * | 2005-09-12 | 2006-04-26 | 山东八三特种耐火材料厂 | Composite sludge for aluminum electrolytic cell and its preparation method |
| CN102010202A (en) * | 2010-12-10 | 2011-04-13 | 昆明冶金研究院 | Method for preparing cold ramming paste for electrolytic aluminum |
| CN103449401A (en) * | 2013-08-15 | 2013-12-18 | 河南科技大学 | Preparation method of high-graphite cold ramming paste |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347824A (en) * | 2015-11-19 | 2016-02-24 | 湖南祯晟炭素实业有限公司 | Preparation method of cold ramming paste specially used for submerged arc furnace whole furnace construction |
| CN105350019A (en) * | 2015-12-08 | 2016-02-24 | 贵州师范大学 | Micro-expansion low-shrinkage carbon block paste used for aluminum electrolysis of silicon-contained additives and preparation method of carbon block paste |
| CN105350019B (en) * | 2015-12-08 | 2019-04-30 | 贵州师范大学 | A kind of microdilatancy lower shrinkage carbon paste used for aluminium electrolysis of silicon-containing additive and preparation method thereof |
| CN106085320A (en) * | 2016-06-16 | 2016-11-09 | 宜兴新威利成耐火材料有限公司 | Aluminum electrolyzing cell used composite brick bonding agent and preparation method thereof |
| CN106435644A (en) * | 2016-12-05 | 2017-02-22 | 中南大学 | Tamping paste for aluminum electrolytic cell and use method of tamping paste |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170824 Address after: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Applicant after: Suntown Technology Group Corporation Address before: Taoyuan County in Hunan province Changde city 415700 disk town Chuangyuan Industrial Park Applicant before: Hunan Chuangyuan Aluminium Industry Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |