CN102010932A - Method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis - Google Patents
Method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis Download PDFInfo
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- CN102010932A CN102010932A CN2010105714584A CN201010571458A CN102010932A CN 102010932 A CN102010932 A CN 102010932A CN 2010105714584 A CN2010105714584 A CN 2010105714584A CN 201010571458 A CN201010571458 A CN 201010571458A CN 102010932 A CN102010932 A CN 102010932A
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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 relates to a method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis, relating to the technical field of recycling of aluminium electrolysis waste silicon carbide. The aluminium electrolysis waste silicon carbide is mainly silicon carbide brick at the lateral part of an aluminium electrolysis cell. The method comprises the following steps: (1) sorting separation: aluminium electrolysis cell waste silicon carbide after overhaul is sorted and separated from other waste refractory materials and corrosion part on the surface of the waste silicon carbide is removed; (2) crushing: the separated waste silicon carbide is crushed and ground; (3) free treatment: the corrosive waste silicon carbide separated in the step (1) is delivered into a free treatment system to be treated; (4) burdening and mixing: the ground silicon carbide powder is added with water and resin, and the mixture are evenly stirred; (5) balling: the mixed material is delivered to a pelletizing machine to be pelletized into small balls; and (6) curing: the obtained small balls are subject to natural curing for 4-7 days, thus obtaining the deoxidizer. According to the invention, the pollution problem of the aluminium electrolysis waste silicon carbide is effectively solved and the recycling of solid wastes is realized.
Description
Technical field
The present invention relates to the useless silicon carbide recovery and utilization technology field of electrolysis of aluminum, relate generally to the innoxious use method of the useless silicon carbide that does not comprise useless carbonaceous material of electrolysis of aluminum overhaul process discharging, be specifically related to a kind of method of utilizing the reductor that the useless silicon carbide production of electrolysis of aluminum is used to make steel.
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, useless silicon carbide, 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 dry method harmless treatment waste tank lining technology of Chu Xianing obtains certain breakthrough aspect harmless treatment in recent years, this technology mainly is to be reagent with lime or Wingdale, with silica containing material is additive, by 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 liner need.
In the electric-arc furnace steelmaking operation, usually oxidation being skimmed to finish latter stage calls reduction period during this period of time to tapping.Main task during this section be make that reducing slag spreads, deoxidation, desulfurization, control chemical ingredients and adjust temperature.For improving the quality of steel, to shorten the heat, the simplification technological process also reduces production costs, and deoxidation in most cases and alloying are carried out simultaneously, and the reductor part in the adding steel is consumed in the deoxidation of steel, is converted into deoxidation products and discharges; Another part is then absorbed by molten steel, plays alloying action.Reductor commonly used has Fe-Mn, Fe-Si, Mn-Si, alloys such as Ca-Si.During blow end point, silicon content is extremely low in the molten steel, for reaching the requirement of each grade of steel to silicone content, must add a certain amount of silicon with the alloy material form, and this process is called and increases silicon; The silicon that is added also makes the silicon in the molten steel increase except as the reductor consumption part.Increase the silicon amount and will can not surpass the blowing scope that steel grade allowed through accurately calculating.
Summary of the invention
What the purpose of this invention is to provide the useless silicon carbide of a kind of electrolysis of aluminum effectively utilizes method, and takes the harmless treatment measure in utilizing process, effectively solves the pollution problem of the useless silicon carbide of electrolysis of aluminum, realizes the recycling of solid waste.
The objective of the invention is to be achieved through the following technical solutions:
The useless silicon carbide of the electrolysis of aluminum that the present invention uses relates to the useless silicon carbide that electrolytic cell overhaul produces in the Aluminum Electrolysis Production process, mainly refers to the aluminum cell side silicon carbide brick; The useless siliceous composition height of silicon carbide is than good utilisation; But sidepiece silicon carbide hardness density is big, generally is not used in the manufacturing lagging material.
The method that the useless silicon carbide of electrolysis of aluminum of the present invention is produced reductor, realize by following steps:
A, letter sorting separate: the aluminium electrolytic silicon carbide and the letter sorting of other waste refractory materials of overhaul are opened, remove useless silicon carbide corrosion part with mechanically cutting or extruding way again;
B, fragmentation: the useless silicon carbide fragmentation after will separating, carry out in small, broken bits again;
C, innoxious: send innoxious system to handle in the useless silicon carbide of isolating corrosion among the step a;
D, batching batch mixing: the carborundum powder after in small, broken bits is added water and wilkinite stirs;
E, balling-up: the silicon carbide materials that will be mixed is sent into the bead that a ball mechanism becomes.
F, maintenance:, be reductor with the bead natural curing of making 4～7 days.
Further, will give up silicon carbide in small, broken bits to granularity be 100～200 purpose fine powders.
Further, the water of adding accounts for 10～20% of total material quality.
Further, the wilkinite of adding accounts for 1～5% of total material quality.
Further, the little spherical diameter of the group's of sending into ball mechanism one-tenth is Ф 2～4mm.
The reductor master composition that the present invention makes effectively utilizes the discarded silicon carbide of aluminium cell, the one, solved the pollution problem of depleted silicon carbide, the 2nd, depleted silicon carbide is fully utilized, and utilize with low costly, but the reductor of producing per ton is saved 2000 yuan than similar silicon carbide reductor.As be used for steelmaking process, can make the steel production enterprise of producing 5000000 tons per year save cost more than 3,000 ten thousand yuan.
Embodiment
To successively adopt jaw crusher, Raymond mill or ball mill to be crushed to 100～200 purpose fine powders except that 800 kilograms in the useless silicon carbide of the electrolysis of aluminum of corrosion removal part; The wilkinite that adds 150 kg water and 20 kilograms.Above-mentioned material is adopted the stirrer batch mixing, ensure that batch mixing is even; Send innocuity disposal system with the useless silicon carbide of corrosive small portion simultaneously, it should be noted that, the innocuity disposal system that present embodiment is mentioned relates to the applicant's patented technology independently in addition, and does not influence the enforcement of the invention technical scheme, therefore is not described in detail.The group's of employing ball mechanism becomes Ф 2～4mm silicon carbide bead then, and 950 kilograms of silicon carbide beads are produced in natural curing 7 days.
Claims (8)
1. method of utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor is characterized in that: specifically may further comprise the steps:
A, letter sorting separate: the aluminium electrolytic silicon carbide and the letter sorting of other waste refractory materials of overhaul are opened, remove useless silicon carbide corrosion part;
B, fragmentation: the useless silicon carbide fragmentation after will separating, advance in small, broken bits again;
C, batching batch mixing: the carborundum powder after in small, broken bits is added water and wilkinite stirs;
D, balling-up: the silicon carbide materials that will be mixed is made bead;
E, maintenance:, be reductor with the bead natural curing after the moulding 4～7 days.
2. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1, it is characterized in that: described aluminium electrolytic silicon carbide is aluminum cell side silicon carbide.
3. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1 is characterized in that: adopt mechanically cutting or extruding way to remove useless silicon carbide corrosion part.
4. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1 is characterized in that: among the step b useless silicon carbide in small, broken bits to granularity be 100～200 purpose fine powders.
5. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1, it is characterized in that: the water that adds among the step c accounts for 10～20% of total material quality.
6. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1, it is characterized in that: the wilkinite that adds among the step c accounts for 1～5% of total material quality.
7. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1, it is characterized in that: the silicon carbide materials that will be mixed in the steps d is sent into a ball mechanism and is become bead, and the little spherical diameter of making is Ф 2～4mm.
8. the method for utilizing the useless silicon carbide of electrolysis of aluminum to produce reductor according to claim 1 is characterized in that: send innoxious system to handle in the useless silicon carbide of isolating corrosion among the step a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571458A CN102010932B (en) | 2010-12-03 | 2010-12-03 | Method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010571458A CN102010932B (en) | 2010-12-03 | 2010-12-03 | Method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis |
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| CN102010932A true CN102010932A (en) | 2011-04-13 |
| CN102010932B CN102010932B (en) | 2012-08-29 |
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| CN201010571458A Expired - Fee Related CN102010932B (en) | 2010-12-03 | 2010-12-03 | Method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033208A (en) * | 2015-07-14 | 2015-11-11 | 河南科技大学 | High-carbon low-chromium stainless steel crystallizer casting powder and preparation method thereof |
| CN106744964A (en) * | 2016-11-21 | 2017-05-31 | 西北矿冶研究院 | Process for recovering silicon carbide from silicon carbide waste |
| CN106755736A (en) * | 2017-01-24 | 2017-05-31 | 西安建筑科技大学 | A kind of deoxidizing alloy and preparation method thereof |
| CN106868253A (en) * | 2017-01-24 | 2017-06-20 | 西安建筑科技大学 | A kind of LF furnace refining slags and preparation method thereof |
| CN106939368A (en) * | 2017-01-24 | 2017-07-11 | 西安建筑科技大学 | A kind of ladle carburant and preparation method thereof |
| CN107201424A (en) * | 2017-06-15 | 2017-09-26 | 王强 | The technique that a kind of utilization electrolytic aluminium factory aluminium cell slag from delining produces deoxidizer in steel production |
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| JP2002003929A (en) * | 2000-06-19 | 2002-01-09 | Asahi Giken Hanbai Kk | SLAG-MAKING AGENT FOR DEOXIDATION COMPOSED OF ALUMINUM DUST AND SiC |
| US6471931B1 (en) * | 1998-11-20 | 2002-10-29 | Clemson University | Process for recycling spent pot liner |
| CN1895803A (en) * | 2006-06-22 | 2007-01-17 | 中国铝业股份有限公司 | Treatment of aluminum electrolytic-cell waste lining |
| US20070231237A1 (en) * | 2006-03-28 | 2007-10-04 | Council Of Scientific And Industrial Research | Process for the preparation of silicon carbide from spent pot liners generated from aluminum smelter plants |
| CN101306798A (en) * | 2008-06-24 | 2008-11-19 | 中国铝业股份有限公司 | Process for treating waste liner of aluminium cell catalyzed by coal |
| 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 |
-
2010
- 2010-12-03 CN CN201010571458A patent/CN102010932B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6471931B1 (en) * | 1998-11-20 | 2002-10-29 | Clemson University | Process for recycling spent pot liner |
| JP2002003929A (en) * | 2000-06-19 | 2002-01-09 | Asahi Giken Hanbai Kk | SLAG-MAKING AGENT FOR DEOXIDATION COMPOSED OF ALUMINUM DUST AND SiC |
| US20070231237A1 (en) * | 2006-03-28 | 2007-10-04 | Council Of Scientific And Industrial Research | Process for the preparation of silicon carbide from spent pot liners generated from aluminum smelter plants |
| CN1895803A (en) * | 2006-06-22 | 2007-01-17 | 中国铝业股份有限公司 | Treatment of aluminum electrolytic-cell waste lining |
| CN101306798A (en) * | 2008-06-24 | 2008-11-19 | 中国铝业股份有限公司 | Process for treating waste liner of aluminium cell catalyzed by coal |
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033208A (en) * | 2015-07-14 | 2015-11-11 | 河南科技大学 | High-carbon low-chromium stainless steel crystallizer casting powder and preparation method thereof |
| CN105033208B (en) * | 2015-07-14 | 2017-05-03 | 河南科技大学 | High-carbon low-chromium stainless steel crystallizer casting powder and preparation method thereof |
| CN106744964A (en) * | 2016-11-21 | 2017-05-31 | 西北矿冶研究院 | Process for recovering silicon carbide from silicon carbide waste |
| CN106755736A (en) * | 2017-01-24 | 2017-05-31 | 西安建筑科技大学 | A kind of deoxidizing alloy and preparation method thereof |
| CN106868253A (en) * | 2017-01-24 | 2017-06-20 | 西安建筑科技大学 | A kind of LF furnace refining slags and preparation method thereof |
| CN106939368A (en) * | 2017-01-24 | 2017-07-11 | 西安建筑科技大学 | A kind of ladle carburant and preparation method thereof |
| CN107201424A (en) * | 2017-06-15 | 2017-09-26 | 王强 | The technique that a kind of utilization electrolytic aluminium factory aluminium cell slag from delining produces deoxidizer in steel production |
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| CN102010932B (en) | 2012-08-29 |
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Granted publication date: 20120829 Termination date: 20121203 |