CN105483752A - Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod - Google Patents
Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod Download PDFInfo
- Publication number
- CN105483752A CN105483752A CN201510984455.6A CN201510984455A CN105483752A CN 105483752 A CN105483752 A CN 105483752A CN 201510984455 A CN201510984455 A CN 201510984455A CN 105483752 A CN105483752 A CN 105483752A
- Authority
- CN
- China
- Prior art keywords
- high conductivity
- cathode steel
- steel bar
- waste
- recovery method
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C25C3/12—Anodes
Abstract
The invention provides a recovery method of a waste high-conductivity aluminum electrolysis cathode steel rod. Firstly, a waste cathode steel rod is straightened; then, a carburized layer about 2 mm on the outer surface layer of the steel rod is cut off by using a machining method; and finally, a machined high-conductivity cathode steel rod serves as a raw material for smelting, is used for producing a high-conductivity anode steel jaw through a casting method, and is returned to electrolytic aluminum production for use to realize closed-loop recycling of the cathode steel rod. As the recovery method reasonably uses the waste cathode steel rod, the resource recycling is realized, the production cost of an electrolytic aluminum factory is largely reduced, the effect of killing two birds with one stone is achieved, and the economic benefit is effectively improved.
Description
Technical field
The present invention relates to a kind of recovery method of waste and old high conductivity aluminium electrolysis cathode rod iron, belong to electrolysis of aluminum solid waste resource recovery and utilize technical field.
Background technology
Cathode steel bar plays very important effect in Aluminium Electrolysis, and its quality directly has influence on that can electrolysis production be stablized, the height of efficient and production cost.At present, adopt high conductivity steel to make current conducting rod, improve cathodic conductivity energy, decrease cathode steel bar pressure drop; And at cathode collector bar correct position wrap insulate material, decrease negative electrode horizontal current intensity, improve electrolyzer Distribution of Magnetic Field, stabilize electrolyzer aluminum liquid horizontal, and then decrease a ton aluminium power consumption.Therefore, although high conductivity cathode steel bar price is far away higher than original plain carbon stool cathode steel bar, but still electrolysis of aluminum industry is more and more applied in its higher cost performance.
But, along with the prolongation of cathode steel bar duration of service on electrolyzer, what on the one hand rod iron can present in various degree is bending, on the other hand, rod iron corrode by the Al that bleeds, generate Fe-Al alloy, after the fusing point of this alloy melts lower than refractory bricks, resistance increases, and causes the pressure drop of cathode steel bar to increase.Further, after cathode steel bar is corroded, conductive area reduces, and the pressure drop of cathode steel bar also can be made to increase.In addition, rod iron is after operation for some time, and cathode block can, to carburizing in rod iron, cause cathode steel bar resistivity to raise, and energy consumption increases, and causes enterprise's production cost higher.Therefore, during aluminium electrolytic cell cathode overhaul, have to again change cathode steel bar.For the waste and old cathode rod iron taken out after negative electrode overhaul, the method that most of electrolytic aluminium factory adopts is as steel scrap process, price is hundreds of unit only, and the commercial value of steel scrap and the purchase price of cathode steel bar differ greatly, be not only a kind of waste of resource like this, and considerably increase the production cost of enterprise.
In Aluminium Electrolysis process, anode is described as " heart of electrolysis ", and the pressure drop of anode steel jaw as one of the vitals of anode assembling, affect the power consumption of ton aluminium to a certain extent.What current electrolysis aluminium enterprise used is plain carbon stool anode steel jaw, and pressure drop reaches 50-80mV usually, even higher.If using waste and old high conductivity cathode steel bar as starting material melting, obtain the high conductivity cast steel material of chemical composition the same as cathode steel bar, make anode steel jaw, played the effect of making a silk purse out of a sow's ear.
Summary of the invention
The present invention want technical solution problem to be to provide a kind of recovery method of waste and old high conductivity aluminium electrolysis cathode rod iron, overcome the wasting of resources that the improper process of waste and old cathode rod iron causes.
The present invention is achieved through the following technical solutions:
First high conductivity cathode steel bar waste and old in aluminium cell is carried out straightening process, then mechanically the cementation zone of high conductivity cathode steel bar extexine is excised; Again using process after high conductivity cathode steel bar as smelting iron and steel raw material, by casting method production high conductivity anode steel jaw, return in Aluminum Electrolysis Production and use, achieve the recycling of high conductivity cathode steel bar.
The straightening method of high conductivity cathode steel bar is: waste and old high conductivity cathode steel bar places it on plate leveler, carries out straightening by upper and lower mould and roller after taking out cooling; Or waste and old high conductivity cathode steel bar is put into process furnace heat, temperature controls at 800 degrees centigrade, rod iron burn in process furnace red after, hang out and be placed on smooth Plate Steel, with pneumatic hammer by rod iron straightening, slinging after straightening to be placed on smooth ground allows its naturally cooling.
Adopt the mechanical means of milling or planing, excised by the cementation zone of high conductivity cathode steel bar outside surface, excision thickness is about 2mm.
The production method of described high conductivity anode steel jaw is: using the high conductivity cathode steel bar after process as raw material, utilize intermediate frequency furnace to carry out melting, adopts sand mold casting or lost foam casting process, production high conductivity anode steel jaw.
Tool of the present invention has the following advantages:
1, to waste and old high conductivity cathode steel bar layered shaping, turn waste into wealth.Originally carry out the waste and old high conductivity cathode steel bar reclaimed as steel scrap, unit take-back cost per ton is hundreds of unit only; Now by aligning, top layer milling or planing operation, melting and casting process, obtain novel energy-conserving anode steel jaw, price about about 8000 yuan, even if consider refining losses, economic benefit is highly significant also.
2, waste and old high conductivity cathode steel bar reclaims the anode steel jaw made, and resistance value reduces than ordinary steel pawl, can bring considerable economic benefit and environmental benefit, play the effect of making a silk purse out of a sow's ear.
Embodiment
Embodiment 1
Waste and old cathode rod iron (deformation extent is less) is taken out from electrolyzer, places after slinging and allow its naturally cooling on the ground, after for some time, place it on plate leveler, carry out straightening processing by upper and lower mould and roller; Then with the machining process of milling or planing, remove rod iron extexine and be about the thick cementation zone of 2mm; Utilize intermediate frequency furnace to carry out melting the rod iron after processing again, adopt sand mold casting or lost foam casting process, produce novel energy-conserving anode steel jaw.Resistance value reduces 20-30% than ordinary steel pawl, makes anode steel jaw average pressure drop to below 40mV, and ton aluminium on average economizes on electricity 40--60kWh, produces 3000000 tons of primary aluminum per year and calculates, can save about 100,000,000 yuan of electricity charge every year with scale aluminium electrolysis enterprise company.If be generalized to the 4000 ten thousand tons of electrolytic aluminum production capacities in the whole nation, the electricity charge more than 1,000,000,000 yuan can be saved every year.
Embodiment 2
Waste and old cathode steel bar (deformation extent is larger) is taken out from electrolyzer, put into process furnace heating, temperature controls at 800 degrees centigrade, until rod iron burn in stove red after, hang out and be placed on smooth Plate Steel, with pneumatic hammer by rod iron straightening, slinging after straightening to be placed on smooth ground allows its naturally cooling; Then with the machining process of milling or planing, remove rod iron extexine and be about the thick cementation zone of 2mm; Utilize intermediate frequency furnace to carry out melting the rod iron after processing again, adopt sand mold casting or lost foam casting process, produce novel energy-conserving anode steel jaw.
Claims (5)
1. a recovery method for waste and old high conductivity aluminium electrolysis cathode rod iron, is characterized in that:
First high conductivity cathode steel bar waste and old in aluminium cell is carried out straightening process, then mechanically the cementation zone of high conductivity cathode steel bar extexine is excised; Again using process after high conductivity cathode steel bar as smelting iron and steel raw material, by casting method production high conductivity anode steel jaw, return in Aluminum Electrolysis Production and use, achieve the recycling of high conductivity cathode steel bar.
2. recovery method according to claim 1, is characterized in that, the straightening method of high conductivity cathode steel bar is: waste and old high conductivity cathode steel bar places it on plate leveler, carries out straightening by upper and lower mould and roller after taking out cooling.
3. recovery method according to claim 1, it is characterized in that, the straightening method of high conductivity cathode steel bar is: waste and old high conductivity cathode steel bar is put into process furnace and heats, temperature controls at 800 degrees centigrade, rod iron burn in process furnace red after, hang out and be placed on smooth Plate Steel, with pneumatic hammer by rod iron straightening, slinging after straightening to be placed on smooth ground allows its naturally cooling.
4. recovery method according to claim 1, is characterized in that, adopts the mechanical means of milling or planing, and excised by the cementation zone of high conductivity cathode steel bar outside surface, excision thickness is 2mm.
5. recovery method according to claim 1, is characterized in that, using the high conductivity cathode steel bar after process as raw material, utilizes intermediate frequency furnace to carry out melting, adopts sand mold casting or lost foam casting process, production high conductivity anode steel jaw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510984455.6A CN105483752A (en) | 2015-12-25 | 2015-12-25 | Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510984455.6A CN105483752A (en) | 2015-12-25 | 2015-12-25 | Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105483752A true CN105483752A (en) | 2016-04-13 |
Family
ID=55671009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510984455.6A Pending CN105483752A (en) | 2015-12-25 | 2015-12-25 | Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105483752A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115747679A (en) * | 2022-08-23 | 2023-03-07 | 云南云铝绿源慧邦工程技术有限公司 | Preparation method of high-performance microalloyed anode steel claw |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202081182U (en) * | 2011-04-21 | 2011-12-21 | 郑州经纬科技实业有限公司 | High conductivity cathode collector bar of electrolytic cell |
| CN103305747A (en) * | 2013-06-26 | 2013-09-18 | 李会民 | Steel bar or steel claw section for electric conduction of electrolytic aluminum and manufacturing method of steel bar or steel claw section |
-
2015
- 2015-12-25 CN CN201510984455.6A patent/CN105483752A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202081182U (en) * | 2011-04-21 | 2011-12-21 | 郑州经纬科技实业有限公司 | High conductivity cathode collector bar of electrolytic cell |
| CN103305747A (en) * | 2013-06-26 | 2013-09-18 | 李会民 | Steel bar or steel claw section for electric conduction of electrolytic aluminum and manufacturing method of steel bar or steel claw section |
Non-Patent Citations (5)
| Title |
|---|
| 刘海林: ""高导电性阴极钢棒应用技术分析"", 《企业技术开发》 * |
| 张志强: ""改善阳极钢爪性能、提高预焙铝电解槽综合经济效益"", 《轻金属》 * |
| 王从曾 等: ""提高阳极钢爪导电性能的途径"", 《轻金属》 * |
| 谷万铎 等: ""高导电性阴极钢棒在铝电解槽的应用"", 《世界有色金属》 * |
| 黄英科 等: ""铝电解槽废旧阴极钢棒的回收利用"", 《有色金属（冶炼部分）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115747679A (en) * | 2022-08-23 | 2023-03-07 | 云南云铝绿源慧邦工程技术有限公司 | Preparation method of high-performance microalloyed anode steel claw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105543896B (en) | A kind of Prebaked Anode In Aluminium Cell group structure | |
| CN105803487B (en) | A kind of prd-baked Al electrolysis production method that no anode anode scrap generates | |
| NO340775B1 (en) | Cathode for aluminum electrolysis cell, method for producing such cathode and aluminum electrolysis cell with such cathode. | |
| CN106756082B (en) | A kind of technique of electron-beam cold bed furnace recycling remelting TC11 crumbles | |
| CN101319333A (en) | Titanium/aluminum composite board and production method thereof | |
| CN103691901B (en) | Cored crystallizer for upwardly drawing continuous casting copper tubes and method for manufacturing high-performance copper alloy tubes | |
| CN104152806B (en) | A kind of large mould steel shaping roll casting production process | |
| CN102818454A (en) | Composite crucible with advantages of energy saving, low cost and capability of being alloyed | |
| CN107012361A (en) | A kind of electrodepositing zinc rare earth alloy anode and preparation method thereof | |
| CN107058854A (en) | A kind of vacuum smelting method of the high manganese high-aluminum steel of Nb, V, Ti microalloying | |
| CN105483752A (en) | Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod | |
| CN105887133B (en) | A kind of electrolytic manganese dioxide produces the preparation method of high resistance of deformation Ni―Ti anode | |
| CN105463516A (en) | Lead alloy anode plate production method | |
| CN101024885B (en) | Aluminium steel composite structure anode steel grab cross-beam manufacture technology | |
| CN104190814B (en) | A kind of high-quality turbine blade hot moulding method | |
| CN106400053A (en) | Integrally-formed aluminum electrolytic cell based on cathode inner liner and integral forming method thereof | |
| CN102672421B (en) | Method for processing Cu-Cr alloy contact, contact finger or contact seat part for high voltage switch | |
| CN104789990A (en) | Aluminum electrolysis anode aluminum claw | |
| CN105420548B (en) | A kind of lead-calcium alloy production method | |
| CN2832833Y (en) | Crust breaking chips of prebaked anode aluminium cell | |
| CN109898101B (en) | Novel energy-saving anticorrosion anode steel claw for electrolytic aluminum and design method | |
| CN105839142B (en) | Aluminum electrolyzing cell used anode steel claw and preparation method thereof | |
| CN205556800U (en) | Mechanical type anode steel claw structure for pre -baked aluminum reduction cells | |
| CN104894350A (en) | Waste heat water toughening method and device for multi-mold assemblage casted high manganese steel casting | |
| CN103966629A (en) | Anode carbon block group for aluminum electrolysis cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160413 |