CN107663582B - A method of cooled agglomerated pellet is made with light dolomite dedusting ash - Google Patents

A method of cooled agglomerated pellet is made with light dolomite dedusting ash Download PDF

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Publication number
CN107663582B
CN107663582B CN201610609385.0A CN201610609385A CN107663582B CN 107663582 B CN107663582 B CN 107663582B CN 201610609385 A CN201610609385 A CN 201610609385A CN 107663582 B CN107663582 B CN 107663582B
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Prior art keywords
dedusting ash
light dolomite
agglomerated pellet
cooled agglomerated
magnesite
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CN201610609385.0A
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CN107663582A (en
Inventor
洪建国
宋旭飞
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Shanghai Meishan Iron and Steel Co Ltd
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Shanghai Meishan Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention relates to a kind of methods with light dolomite dedusting ash production cooled agglomerated pellet, mainly solve the technical issues of light dolomite dedusting ash can not recycle in the prior art.The method of the present invention includes: 1) ingredient, weighs light dolomite dedusting ash, magnesite, continuous casting steel billet iron scale, waterglass and cement according to the ratio, obtains once mixing material after mixing, it is primary mix added water and stirred uniformly in material after secondary mixings obtained expect；2) the secondary mixing material formed in step 1) is pressed by the pelletizing that outer dimension is 40 × 40 × 30mm by high pressure double-roll type ball press；3) cooled agglomerated pellet for conserving the pelletizing being pressed into dry and ventilated environment 9~10 days qualified.The method of the present invention prepares cooled agglomerated pellet and uses in converter molten steel smelting process as alkalinity regulator and furnace retaining, so that being recycled for light dolomite dedusting ash, continuous casting steel billet iron scale, reduces the smelting cost of iron and steel enterprise's molten steel.

Description

A method of cooled agglomerated pellet is made with light dolomite dedusting ash
Technical field
The present invention relates to a kind of processing methods of light dolomite dedusting ash, in particular to a kind of to use light dolomite dedusting The method of ash production cooled agglomerated pellet.
Background technique
Iron and steel enterprise is the cost for reducing outsourcing light dolomite, is produced by the sleeve lime kiln dolime provided for oneself Light dolomite out uses dry method dust in process of production, and then produces certain light dolomite dedusting ash, for The light dolomite dedusting ash of generation lacks always effective processing.
File " recycling for pneumatic steelmaking production line magnesium carbonaceous waste " (author Wu Hanyuan, " refractory material " P154- 155, ISSN 1001-1935, in April, 2015 publish), it discloses using MgO as the refractory material of principal component and realizes full dose in steel mill Or it is partially substituted recycling and utilize, will the waste of converter and ladle magnesia carbon brick and tundish magnesium calcium paint crush after plus Bonding agent is pressed into magnesium ball, substitutes the dolomite that traditional process for making uses with its full dose or part, produces BOF steelmaking shop Raw waste has obtained maximum recycling, is also beneficial to reduce the quantity of slag generated in converter steelmaking process, improve Metallurgical effect, this article are to add bonding agent after crushing the waste of converter and ladle magnesia carbon brick and tundish magnesium calcium paint It is pressed into magnesium ball.
Chinese patent document CN 104046772A is disclosed and a kind of is manufactured cold-consolidated ball with converter gas dry method electro-precipitating dust Group method, solve the problems, such as converter gas dry method electro-precipitating dust can not balling-up so that converter gas dry method electro-precipitating dust is raw again It produces to utilize and be operated, but add hydraulic art since its technique uses twice, first is that converter gas dry method electro-precipitating dust is added water It is digested, amount of water is 10% or so, second is that water is added to be stirred balling-up again in balling-up, amount of water is 5% or so, in this way It causes the moisture content of finished ball high, 12% or so, converter is added in use, the case where being easy to appear splash, smoldering；And by In which employs the bonding agent of waterglass, its high production cost is caused.
Summary of the invention
The object of the present invention is to provide a kind of methods with light dolomite dedusting ash production cooled agglomerated pellet, mainly solve existing There is the technical issues of light dolomite dedusting ash can not recycle in technology.
The technical solution adopted by the present invention is that: a method of cooled agglomerated pellet being made with light dolomite dedusting ash, including Following steps:
1) ingredient weighs light dolomite dedusting ash, magnesite, continuous casting steel billet iron scale, waterglass and water according to the ratio Mud obtains once mixing after mixing and expect, uniformly rear secondary mixing material obtained, secondary mixing are added water and stirred in material in primary mix Expect the mass percent of component are as follows: light dolomite dedusting ash 29.2~31.5%, magnesite 29.2~31.5%, continuous casting steel billet Iron scale 29.2~31.5%, waterglass 2.3~3.5%, cement 2.3~3.5%, water 3.1~5.5%.
2) by high pressure double-roll type ball press by the secondary mixing material formed in step 1) be pressed into outer dimension be 40 × The pelletizing of 40 × 30mm；
3) cooled agglomerated pellet for conserving the pelletizing being pressed into dry and ventilated environment 9~10 days qualified.
Light dolomite dedusting ash partial size≤5mm of the present invention, the partial size 30-50mm of magnesite, continuous casting steel billet iron scale Partial size 10-20mm, three granularity is different, is conducive to balling-up, while reacting using magnesia powder and calcium oxide and moisture Promote the characteristic of balling-up, reaction equation: MgO+CaO+2H2O=Ca (OH)2+Mg(OH)2。
Further, magnesite of the present invention, light dolomite dedusting ash, continuous casting steel billet iron scale proportion are appropriate, magnesite Ore particle diameter is larger, and magnesite mineral content is high-leveled and difficult sufficiently to digest light dolomite dedusting ash, continuous casting steel billet iron scale, while water chestnut Magnesium mine is outsourcing product, and additional proportion is excessively high, also increases cost；Magnesite addition is too low, then is difficult to balling-up again, applicant passes through During a large amount of test determines that the secondary mixing of the present invention is expected, light dolomite dedusting ash 29.2~31.5%, magnesite 29.2~ 31.5%, 29.2~31.5% effect of continuous casting steel billet iron scale is preferred.
The mass percent of light dolomite dedusting ash component in the present invention are as follows: MgO 35~65%, CaO 45~55%, S≤0.035%, P≤0.14%；The mass percent of magnesite component are as follows: MgCO3>=95%, Fe≤8%；Continuous casting steel billet oxygen Change iron sheet component mass percent be；TFe >=75%, H2O≤5%.
Cement is to be convenient for early stage balling-up during pressure ball to improve its early strength as bonding agent in the present invention, Its additional proportion is not easy excessively high, because the silica composition in cement is higher, this does not utilize steel-making, and additional proportion is too low, The effect for not having early strength then, through overtesting, additional proportion control 2.3~3.5%, single finished product cooled agglomerated pellet Intensity is 800-1500N.
Further, the cement that the present invention uses marked as 425R, the synthesis cost performance for the cooled agglomerated pellet produced is preferred.
Waterglass is a kind of water-soluble silicate, and aqueous solution is commonly called as waterglass, is a kind of mine binder.Its chemical formula is R2O·nSiO2, R in formula2O is alkali metal oxide, and n is the ratio of silica and alkali metal oxide molal quantity, referred to as water The number that rubs of glass.Common waterglass is the aqueous solution of sodium metasilicate in building.Cohesive force is strong, intensity is higher, acid resistance, heat resistance It is good, alkali resistance and poor water resistance.The aerial condensation cure of waterglass and the condensation cure of lime are closely similar, mainly pass through Carbonization and dehydration crystallization consolidate two processes to realize, with the progress of carburizing reagent, amount of silica gel increases, then free moisture Evaporation and Silicagel dehydration condense hardening at solid.Its additional proportion be not easy it is excessively high because silica in waterglass at Point higher, this does not utilize steel-making, and additional proportion is too low, then does not have bond effect, and through overtesting, additional proportion, which controls, to exist 2.3~3.5%.
The present invention can well utilize light dolomite precipitator dust reclaim, while the cold-pressing balls moisture control produced exists 6% hereinafter, and the continuous casting steel billet iron scale generated in iron and steel enterprise is recycled, both solve environmental problem Benefit is brought for company again, realizes the green management of company.
A kind of method with light dolomite dedusting ash production cooled agglomerated pellet disclosed by the invention, by by light dolomite Dedusting ash, magnesite, continuous casting steel billet iron scale mix and are pressed into cooled agglomerated pellet after adding certain bonding agent, and cooled agglomerated pellet exists It is used in converter molten steel smelting process as alkalinity regulator and furnace retaining, so that light dolomite dedusting ash, continuous casting steel billet aoxidize Iron sheet is recycled, and the smelting cost of iron and steel enterprise's molten steel is reduced.
The present invention has following good effect compared with prior art: 1, the present invention realizes light dolomite dedusting ash, connects Cast iron mud recycles, and has filled up the blank of existing light dolomite dedusting ash effective use.2, cold-pressing balls produced by the invention Finished ball water content be lower than 6%, do not occur the case where splash, smolder in use.
Specific embodiment
With reference to embodiment, the present invention is furture elucidated, it should be understood that following specific embodiments are only used for It is bright the present invention rather than limit the scope of the invention.
A method of cooled agglomerated pellet is made with light dolomite dedusting ash, comprising the following steps:
1) ingredient weighs light dolomite dedusting ash, magnesite, continuous casting steel billet iron scale, waterglass and water according to the ratio Mud obtains once mixing after mixing and expect, uniformly rear secondary mixing material obtained, secondary mixing are added water and stirred in material in primary mix Expect the mass percent of component are as follows: light dolomite dedusting ash 29.2~31.5%, magnesite 29.2~31.5%, continuous casting steel billet Iron scale 29.2~31.5%, waterglass 2.3~3.5%, cement 2.3~3.5%, water 3.1~5.5%.
2) by high pressure double-roll type ball press by the secondary mixing material formed in step 1) be pressed into outer dimension be 40 × The pelletizing of 40 × 30mm；
3) cooled agglomerated pellet for conserving the pelletizing being pressed into dry and ventilated environment 9~10 days qualified.
Cement used marked as 425R in embodiment.
The raw material proportioning of the embodiment of the present invention is shown in Table 1.
The mass percentage of water in the raw material proportioning and cooled agglomerated pellet finished product of 1 embodiment of the present invention of table
A kind of method with light dolomite dedusting ash production cooled agglomerated pellet disclosed by the invention, utilizes this method embodiment 1~5, this is respectively 1.56,2.55,1.55,1.54,1.56 yuan to ton steel drop, the mass percentage in the cooled agglomerated pellet of production Respectively 5.8%, 5.5%, 4%, 3.8%, 3.0% do not occur the case where splash, smolder after use is added.
The method of the present invention realizes light dolomite dedusting ash, continuous casting steel billet iron scale recycles, and reduces steel The smelting cost of enterprise's molten steel.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape At technical solution, fall within the scope of protection required by the present invention.

Claims (4)

1. a kind of method with light dolomite dedusting ash production cooled agglomerated pellet, characterized in that the method includes following step It is rapid:
1) ingredient weighs light dolomite dedusting ash, magnesite, continuous casting steel billet iron scale, waterglass and cement according to the ratio, mixes It obtains once mixing after even and expect, add water and stir uniformly rear secondary mixing material obtained, secondary mixing material group in material in primary mix The mass percent divided are as follows: light dolomite dedusting ash 29.2~31.5%, magnesite 29.2~31.5%, continuous casting steel billet oxidation Iron sheet 29.2~31.5%, waterglass 2.3~3.5%, cement 2.3~3.5%, water 3.1~5.5%；The light dolomite The mass percent of dedusting ash component are as follows: MgO 35~65%, CaO 45~55%, S≤0.035%, P≤0.14%, it is light-burned The sum of mass percent of dolomite dedusting ash each component is 100%；
2) by high pressure double-roll type ball press by the secondary mixing material formed in step 1) be pressed into outer dimension be 40 × 40 × The pelletizing of 30mm；
3) pelletizing being pressed into is conserved to 9~10 days to obtain finished product cooled agglomerated pellet in dry and ventilated environment.
2. a kind of method with light dolomite dedusting ash production cooled agglomerated pellet as described in claim 1, characterized in that magnesite The mass percent of mine component are as follows: MgCO3>=95%, Fe≤8%, the sum of mass percent of magnesite each component are 100%； The mass percent of continuous casting steel billet iron scale component is；TFe >=75%, H2O≤5%.
3. a kind of method with light dolomite dedusting ash production cooled agglomerated pellet as described in claim 1, characterized in that described Cement marked as 425R.
4. a kind of method with light dolomite dedusting ash production cooled agglomerated pellet as described in claim 1, characterized in that described The intensity of single finished product cooled agglomerated pellet is 800-1500N.
CN201610609385.0A 2016-07-28 2016-07-28 A method of cooled agglomerated pellet is made with light dolomite dedusting ash Active CN107663582B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101270410A (en) * 2007-03-20 2008-09-24 尚国洪 Cold bonded pellet and method of producing the same
CN102876835A (en) * 2012-10-26 2013-01-16 重庆大学 New technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash
CN103320607A (en) * 2013-07-05 2013-09-25 首钢京唐钢铁联合有限责任公司 Cold solid ball and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101270410A (en) * 2007-03-20 2008-09-24 尚国洪 Cold bonded pellet and method of producing the same
CN102876835A (en) * 2012-10-26 2013-01-16 重庆大学 New technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash
CN103320607A (en) * 2013-07-05 2013-09-25 首钢京唐钢铁联合有限责任公司 Cold solid ball and preparation method thereof

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