CN102011145B - Method for recycling electrolytes and producing aluminum-silicon alloy as byproduct by using aluminum electrolysis waste mixing material - Google Patents
Method for recycling electrolytes and producing aluminum-silicon alloy as byproduct by using aluminum electrolysis waste mixing material Download PDFInfo
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- CN102011145B CN102011145B CN201010571289A CN201010571289A CN102011145B CN 102011145 B CN102011145 B CN 102011145B CN 201010571289 A CN201010571289 A CN 201010571289A CN 201010571289 A CN201010571289 A CN 201010571289A CN 102011145 B CN102011145 B CN 102011145B
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- ionogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for recycling electrolytes and producing an aluminum-silicon alloy as a byproduct by using an aluminum electrolysis waste mixing material, relating to the technical field of recycling of the aluminum electrolysis waste mixing material, wherein the aluminum electrolysis waste mixing material mainly refers to the mixture of multiple refractory materials without the waste cathode carbon blocks and the side silicon carbide. The application of the method provided by the invention comprises the following steps: crushing the aluminum electrolysis cell waste mixing material into the particles the particle size of which is 0 to 6 mm; and then adding the particles into the running aluminum electrolysis cell periodically, wherein the addition of the particles is performed twice per day, the time interval is 6 to 12 hours, the addition amount is 10 to 50 kg, the particles are added from the aluminum discharging end of the aluminum electrolysis cell or from the opening when the anode is replaced, and the addition is realized mainly by manually and also can be realized mechanically. In the invention, the innocent treatment is adopted, the pollution problem of the aluminum electrolysis waste refractory materials is solved effectively, and the recycling of the solid wastes with certain economic benefit is realized.
Description
Technical field
The present invention relates to the useless blended stock recovery and utilization technology field of electrolysis of aluminum; Relate generally to the innoxious use method of the various waste materials that do not comprise rod iron that discharge in the electrolysis of aluminum overhaul process, be specifically related to a kind of method of utilizing the useless blended stock of electrolysis of aluminum to reclaim ionogen and by-product aluminum silicon alloy.
Background technology
The solid waste of electrolytic aluminium factory discharging mainly is the electrolysis of aluminum waste tank lining, and waste tank lining mainly consists of: cathode carbon pieces, insulating brick, refractory brick, refractory powder (dry type is prevented bleed), fire mortar and heat-insulating shield etc.This waste tank lining contains a large amount of soluble fluoride, prussiate, belongs to Hazardous wastes, is that electrolytic aluminium factory causes one of principal element of environmental pollution.And this waste tank lining quantity is bigger, and the end of the year 2005, domestic primary aluminum output reached 7,800,000 tons, produced aluminium cell waste tank lining 180 kilotons approximately.
At present the most of electrolytic aluminium factory of China does not also solve the pollution problem of electrolysis of aluminum waste tank lining, more employing antiseepage landfill disposal, but landfill disposal contaminated soil again, and with the rainwater polluted underground water that permeates the ground; Indivedual aluminium electrolysis enterprise research Wet techniques are handled waste tank lining; But the Wet technique existence causes secondary pollution easily, equipment corrosion is serious and handle halfway drawback, and promptly antiseepage landfill and Wet technique all can not be realized the harmless treatment and the recycling of waste tank lining.
The pyrogenic process harmless treatment waste tank lining technology that occurs in recent years obtains certain breakthrough aspect harmless treatment; This technology mainly is to be reagent with lime or Wingdale; With silica containing material is additive; Through the calcination process waste tank lining, tail gas makes objectionable impurities fluorochemical and prussiate qualified discharge through purifying treatment.But the aluminium cell waste liner after handling can't become valuable raw material or resource, only can be as the pavior utilization of cheapness, and pyrogenic process harmless treatment cost is higher, handles about 960 yuan of one ton of waste tank lining need.
Summary of the invention
What the purpose of this invention is to provide a kind of electrolysis of aluminum waste refractory materials effectively utilizes method; In utilizing process, take the harmless treatment measure; Effectively solve the pollution problem of electrolysis of aluminum waste refractory materials, realize the recycling of solid waste, and have certain economic benefit.
The objective of the invention is to realize through following technical scheme:
The electrolysis of aluminum of the present invention blended stock that gives up; Relate to the useless blended stock that electrolytic cell overhaul produces in the Aluminum Electrolysis Production process; Also claim aluminium cell overhaul waste residue or electrolysis of aluminum waste tank lining; Mainly refer to remove the multiple refractory materials mixtinite of waste cathode carbon block and sidepiece carborundum, mainly comprise: dry type prevents that bleed, insulating fire brick are insulating brick, refractory brick, asbestos material (asbestos plate, asbestos powder, asbestos wool), calcium silicate board, carbon paste (comprising paste, rod iron paste, end paste between paste, carbon on every side), refractory particle and refractory powder etc.
Soluble fluoride content is very high in the electrolysis of aluminum waste tank lining, and prussiate also exceeds standard.Therefore, must take harmless treatment measures, when utilizing the useless blended stock of electrolysis of aluminum to reclaim ionogen and by-product aluminum silicon alloy, make soluble fluoride and prussiate reach environmental requirement.
The method of utilizing the useless blended stock of electrolysis of aluminum to reclaim ionogen and by-product aluminum silicon alloy of the present invention; Be that the useless blended stock after the aluminium cell overhaul is broken for particle; Periodically join in the operating aluminium cell then, reclaim ionogen, simultaneously the aluminum silicon alloy of output low silicon content.
Be better implement the invention, the ground grains granularity is 0～6mm.
Be better implement the invention, periodically be incorporated as and implement at least every day once to add.
Be better implement the invention, implement every day once to add that each addition is 20～double centner.
Be better implement the invention, when implementing every day to add for twice, twice is added the timed interval is 6～12 hours.
Be better implement the invention, when implementing every day to add for twice, each addition is 10～50 kilograms.
Be better implement the invention, the adding mode is to add or unlimited interpolation when changing anode from the aluminium cell aluminium inlet.
Owing to adopted technique scheme, the invention to have following beneficial effect:
When 1, the invention was implemented, because aluminium cell operates under 900 ℃～980 ℃ high temperature, prussiate was decomposed into harmless composition fully, reaches national requirements for environmental protection.It is that 100mg/L, prussiate are (with CN that national environmental protection leaches toxicity judging standard value (GB 5085.3-2007) inorganic fluoride (not comprising Calcium Fluoride (Fluorspan)) to solid waste
-) be 5 mg/L.
2, the ionogen soluble fluoride in the useless blended stock of electrolysis of aluminum is able to reclaim as fusing assistant when aluminium cell moves, and makes objectionable impurities realize second stage employ; Ionogen soluble fluoride fusing under the electrolyzer high temperature of operation in the useless blended stock of electrolysis of aluminum; The ionogen of fusing is used to fill up the ionogen fluoride salt that normal operation electrolyzer consumes; Thereby can practice thrift fluoride salt 20 kilograms/groove day, cost savings 100 yuan/groove day.
3, the silicon compound in the useless blended stock of electrolysis of aluminum combines with aluminium to produce aluminum silicon alloy in the aluminium electrolysis process overwhelming majority, and silicon is effectively used.Above-mentioned enforcement mechanism has embodied the innoxious measure of control of the invention.
Embodiment
Instance one:
Present embodiment is an example with the 300KA aluminium cell, and aluminum oxide powder is normal to be added automatically.
With 1800 kilograms of the useless blended stocks of aluminium cell overhaul of removing rod iron after the letter sorting classification, be broken for particle less than 6mm; Join for twice every day in the aluminium cell of operation, twice 8 hours at interval joining day, each addition is 30 kilograms, and main the employing artificial the adding also can adopt mechanical adding way to realize.Then actual addition on the one is 60 kilograms, joins in the aluminium cell of operation 1800 kilograms in one month.Through measuring and calculating, recyclable ionogen is 450 kilograms altogether, produces 64 tons of aluminum silicon alloys, silicone content 0.11-0.14%.Cyanide content is 0.00mg/L in ionogen and the aluminum silicon alloy, and cyanide content is 0.00mg/L in the flue gas, explains to reach the national environmental standard requirement; National environmental protection leaches toxicity judging standard value (GB 5085.3-2007) prussiate (with CN to solid waste
-) be 5 mg/L.
Instance two:
Present embodiment is an example with the 300KA aluminium cell, and aluminum oxide powder is normal to be added automatically.
With 2400 kilograms of the useless blended stocks of aluminium cell overhaul of removing rod iron after the letter sorting classification, be broken for particle less than 6mm; Join for twice every day in the aluminium cell of operation, twice 10 hours at interval joining day, each addition is 40 kilograms, adopts artificial the adding, and actual addition was 80 kilograms on 1st, joins in the aluminium cell of operation 2400 kilograms in one month.Through measuring and calculating, recyclable ionogen is 520 kilograms altogether, produces 64 tons of aluminum silicon alloys, silicone content 0.12-0.18%.Cyanide content is 0.00mg/L in ionogen and the aluminum silicon alloy, and cyanide content is 0.00mg/L in the flue gas, explains to reach the national environmental standard requirement, and national environmental protection leaches toxicity judging standard value (GB5085.3-2007) prussiate (with CN to solid waste
-) be 5 mg/L.
Claims (1)
1. utilize the useless blended stock of electrolysis of aluminum to reclaim the method for ionogen and by-product aluminum silicon alloy; It is characterized in that: the aluminium electrolytic blended stock is broken for particle; Periodically join in the operating aluminium cell then, reclaim ionogen, simultaneously the aluminum silicon alloy of output low silicon content; Wherein, Said aluminium electrolytic blended stock is an aluminium cell overhaul waste residue; Mainly refer to remove the multiple refractory materials mixtinite of waste cathode carbon block and sidepiece carborundum, mainly comprise: dry type is prevented bleed, insulating brick, refractory brick, asbestos material, calcium silicate board, carbon paste, refractory particle and refractory powder.
2, the useless blended stock of electrolysis of aluminum according to claim 1 reclaims the method for ionogen and by-product aluminum silicon alloy, and it is characterized in that: the ground grains granularity is 0～6mm.
3, the useless blended stock of electrolysis of aluminum according to claim 1 reclaims the method for ionogen and by-product aluminum silicon alloy, it is characterized in that: periodically add and implement at least every day once to add.
4, according to the method for claim 1 or useless blended stock recovery ionogen of 3 described electrolysis of aluminum and by-product aluminum silicon alloy, it is characterized in that: every day, each addition was 20～double centner when implementing once to add.
5, according to the method for claim 1 or useless blended stock recovery ionogen of 3 described electrolysis of aluminum and by-product aluminum silicon alloy, it is characterized in that: when implementing every day to add for twice, each addition is 10～50 kilograms.
6, the useless blended stock of electrolysis of aluminum according to claim 5 reclaims the method for ionogen and by-product aluminum silicon alloy, and it is characterized in that: twice is added the timed interval is 6～12 hours.
7, the useless blended stock of electrolysis of aluminum according to claim 1 reclaims the method for ionogen and by-product aluminum silicon alloy, it is characterized in that: the adding mode is to add or unlimited interpolation when changing anode from the aluminium cell aluminium inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571289A CN102011145B (en) | 2010-12-03 | 2010-12-03 | Method for recycling electrolytes and producing aluminum-silicon alloy as byproduct by using aluminum electrolysis waste mixing material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571289A CN102011145B (en) | 2010-12-03 | 2010-12-03 | Method for recycling electrolytes and producing aluminum-silicon alloy as byproduct by using aluminum electrolysis waste mixing material |
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| Publication Number | Publication Date |
|---|---|
| CN102011145A CN102011145A (en) | 2011-04-13 |
| CN102011145B true CN102011145B (en) | 2012-08-29 |
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| CN201010571289A Expired - Fee Related CN102011145B (en) | 2010-12-03 | 2010-12-03 | Method for recycling electrolytes and producing aluminum-silicon alloy as byproduct by using aluminum electrolysis waste mixing material |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107626712A (en) * | 2017-08-29 | 2018-01-26 | 陕西三秦能源长宏铝业有限公司 | A kind of aluminium electroloysis danger solid waste integrated conduct method and recycling |
| CN109913911A (en) * | 2019-04-11 | 2019-06-21 | 中南大学 | The processing method of alumina-silica solid waste in a kind of aluminum cell waste liner |
| CN112899729A (en) * | 2021-01-26 | 2021-06-04 | 覃海棠 | Method for electrolyzing lining waste |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043350A (en) * | 1989-11-24 | 1990-06-27 | 郑州轻金属研究所 | Aluminium cell flue dust reclaimed materials is used for a kind of method of electrolysis of aluminum |
| CN1239742A (en) * | 1998-06-22 | 1999-12-29 | 田应甫 | Dry fume purifying system for self-roasting anodic aluminium electrolysis |
| CN101357367A (en) * | 2008-09-19 | 2009-02-04 | 昆明理工大学 | Method for processing waste cell-lining of aluminum cell using coal slack |
| CN101444660A (en) * | 2008-12-30 | 2009-06-03 | 吴正建 | Innocent treatment of cyanide and fluoride in solid waste residues and recycling process thereof |
| CN101798691A (en) * | 2010-04-28 | 2010-08-11 | 四川启明星铝业有限责任公司 | Method for recovering waste cathode of aluminum electrolytic cell |
-
2010
- 2010-12-03 CN CN201010571289A patent/CN102011145B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043350A (en) * | 1989-11-24 | 1990-06-27 | 郑州轻金属研究所 | Aluminium cell flue dust reclaimed materials is used for a kind of method of electrolysis of aluminum |
| CN1239742A (en) * | 1998-06-22 | 1999-12-29 | 田应甫 | Dry fume purifying system for self-roasting anodic aluminium electrolysis |
| CN101357367A (en) * | 2008-09-19 | 2009-02-04 | 昆明理工大学 | Method for processing waste cell-lining of aluminum cell using coal slack |
| CN101444660A (en) * | 2008-12-30 | 2009-06-03 | 吴正建 | Innocent treatment of cyanide and fluoride in solid waste residues and recycling process thereof |
| CN101798691A (en) * | 2010-04-28 | 2010-08-11 | 四川启明星铝业有限责任公司 | Method for recovering waste cathode of aluminum electrolytic cell |
Non-Patent Citations (1)
| Title |
|---|
| 李方义等.铝电解槽废阴极内衬的回收利用.《矿产保护与利用》.2001,(第4期),第51-54页. * |
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