CN107130106B - A kind of sintering method of high-chromic vanadium-titanium ferroferrite - Google Patents
A kind of sintering method of high-chromic vanadium-titanium ferroferrite Download PDFInfo
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- CN107130106B CN107130106B CN201710537740.2A CN201710537740A CN107130106B CN 107130106 B CN107130106 B CN 107130106B CN 201710537740 A CN201710537740 A CN 201710537740A CN 107130106 B CN107130106 B CN 107130106B
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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
- C22B1/16—Sintering; Agglomerating
Abstract
The present invention provides a kind of sintering methods of high-chromic vanadium-titanium ferroferrite, comprising: by raw materials for sintering ingredient；Add water to mix the raw materials for sintering after ingredient, obtains mixture；By ignition sintering after mixture pelletizing；It is characterized in that, Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content be 3~4%；Moisture content is 7.5~7.65% in the mixture, and mixed carbon comtent is 5.5~6.0%；The bed depth when ignition sintering is 660~720mm, and oxygen quality concentration is 1.5~3%.The present invention is by carrying out complex optimum to the technological parameter of sintering, during the sintering process under the comprehensive function of various process conditions, effectively improve mixture composition and the sinter component when high-chromic vanadium-titanium ferroferrite sintering, sintering atmosphere is enhanced, the mine quality of sinter and metallurgical performance is made to be greatly improved.
Description
Technical field
The present invention relates to vanadium iron magnetite technical field more particularly to a kind of sintering methods of high-chromic vanadium-titanium ferroferrite.
Background technique
The sintering of Panzhihua high-titanium type vanadium-titanium magnetite is global problem.Due to the mine coarse size, containing higher titanium,
Fusing point is high, not easy-sintering, and the crisp perovskite etc. of generating property during the sintering process, therefore sinter strength is poor, yield rate is low,
The whole nation is in floor level.Hongge Deposit is one of big vanadium titano-magnetite mining area of Panxi Diqu four, not only the content and Panzhihua of titanium
High-titanium type vanadium-titanium magnetite is suitable, but also contains higher chromium, the grade (Cr of chromium2O3It 0.55%~0.82%) is Panzhihua
8~10 times of high-titanium type vanadium-titanium magnetite, Cr2O3It is also high-melting-point (2400 DEG C) mineral.In addition, Hongge Deposit also has SiO2Contain
Measure low (SiO2Content 3.45%, 2 percentage points lower than common concentrate or more) the characteristics of, the silicate generated in sintering process is viscous
Knot phase content is less, and unique ingredient determines that the difficulty of red lattice high-chromic vanadium-titanium ferroferrite sintering is not only greater than common mine and burns
Knot is sintered also greater than Panzhihua high-titanium type vanadium-titanium magnetite.
The advantage of steel is climbed in resource, the development and utilization of red lattice high-chromic vanadium-titanium ferroferrite are related to the development for climbing steel future.
Hongge Deposit is economically and efficiently smelted on a large scale, also needs to show process using the blast furnace process of smelting process technology maturation.Therefore, it attacks
Gram high-chromic vanadium-titanium ferroferrite sintering difficulty is the key link of red lattice high-chromic vanadium-titanium ferroferrite development and utilization, research and development wound
The high-chromic vanadium-titanium ferroferrite sintering technology of new property has a decisive role to these difficult points are broken through.Currently, about Gao Ge
The research of type vanadic-titanomagnetite sintering reinforcement technique has not been reported.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of sintering method of high-chromic vanadium-titanium ferroferrite, the present invention is mentioned
The higher sinter of quality can be prepared in the method for confession.
The present invention provides a kind of sintering methods of high-chromic vanadium-titanium ferroferrite, comprising:
By raw materials for sintering ingredient；
Add water to mix the raw materials for sintering after ingredient, obtains mixture；
By ignition sintering after mixture pelletizing；
It is characterized in that,
Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content be 3
~4%；
The mass content of moisture is 7.5~7.65% in the mixture, is 5.5~6.0% with carbon mass content；
The bed depth when ignition sintering is 660~720mm, and oxygen quality concentration is 1.5~3%；
The firing temperature of the ignition sintering is 1150~1165 DEG C.
The duration of ignition of the ignition sintering is 2.5~2.7min.
Preferably, the ingredient of the high-chromic vanadium-titanium ferroferrite includes:
The FeO of 30~35wt%；
The V of 0.1~1wt%2O5；
The Cr of 0.55~0.82wt%2O3；
The SiO of 3~4wt%2；
The TiO of 10~13wt%2。
Preferably, the raw materials for sintering includes mineral aggregate, flux and fuel；
The mineral aggregate includes high-chromic vanadium-titanium ferroferrite, import resources, high-grade iron ore, bloodstone and gas ash.
Preferably, the mass ratio of the high-chromic vanadium-titanium ferroferrite, import resources, high-grade iron ore, limonite and gas ash
For (50.5~53.5): (7.3~9.7): (16.2~17.8): (2.1~2.4): (1.9~2.1).
Preferably, the flux includes lime stone, active lime and quick lime.
Preferably, the mass ratio of the lime stone, active lime and quick lime is (3.8~4.2): (1.85~2.15):
(4.1~4.4).
Preferably, the fuel includes coke powder and/or anthracite.
Preferably, the mineral aggregate, flux and quality of fuel ratio are (81~84): (9.7~10.8): (5.6~5.9).
Compared with prior art, the present invention is by improving moisture and mixed carbon comtent in mixture, while improving sintering process
In bed depth complex optimum is carried out to the technological parameter of sintering using sintering technologies such as oxygen-enriched sinterings.
Since high-chromic vanadium-titanium ferroferrite coarse size balling-up is bad, can be improved by improving moisture content in mixture
The granularmetric composition of mixture, improves the gas permeability of the bed of material, to improve Sintering Operation Index；Improve mixture in mixed carbon comtent and
Firing temperature extends the duration of ignition and can satisfy in sintering feed after moisture content improves to the increased demand of sintering heat, improves
Sintering temperature promotes the fusing of mineral to bond, and is conducive to the intensity for improving sinter；Bed depth when improving sintering can prolong
The high-temperature holding time of the long bed of material keeps crystallizable mineral more abundant, is conducive to increase sintering liquid content, improves the mine of sinter
Object the Nomenclature Composition and Structure of Complexes improves the intensity and yield rate of sinter, simultaneously because the auto accumulation heat of sintering process acts on enhancing, it can be with
The heat for increasing sinter bed supplies and reduces the consumption of fuel；The present invention increases the oxygen content by air stream in the bed of material, makes
Macroscopical oxidizing atmosphere is reinforced in sintering process, and fuel combustion is more abundant, accelerates sintering velocity, improves burning zone temperature, promotees
Sintering liquid phase is formed, more high-quality calcium ferrite Binder Phases is generated, improves the mineral composition and structure of sinter, improve sinter
Yield and quality.
The present invention under the comprehensive function of various process conditions, effectively improves high-chromic vanadium-titanium ferroferrite during the sintering process
Mixture composition and sinter component when sintering, enhance sintering atmosphere, flux mineralising, sintering schedule and crystallizable mineral etc.
Sintering process makes the mine quality of sinter and metallurgical performance be greatly improved.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff it is improved or retouching all other example, shall fall within the protection scope of the present invention.
The present invention provides a kind of sintering methods of high-chromic vanadium-titanium ferroferrite, comprising:
By raw materials for sintering ingredient；
Add water to mix the raw materials for sintering after ingredient, obtains mixture；
By ignition sintering after mixture pelletizing；
It is characterized in that,
Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content be 3
~4%；
The mass content of moisture is 7.5~7.65% in the mixture, is 5.5~6.0% with carbon mass content；
The bed depth when ignition sintering is 660~720mm, and oxygen quality concentration is 1.5~3%；
The firing temperature of the ignition sintering is 1152~1163 DEG C.
The duration of ignition of the ignition sintering is 2.55~2.65min.
The present invention improves firing temperature, extends the duration of ignition, mention simultaneously by improving moisture and mixed carbon comtent in mixture
Bed depth during height sintering carries out complex optimum to the technological parameter of sintering using sintering technologies such as oxygen-enriched sinterings,
In sintering process under the comprehensive function of various process conditions, mixture group when high-chromic vanadium-titanium ferroferrite sintering is effectively improved
At with sinter component, enhance the sintering processes such as sintering atmosphere, solvent mineralising, sintering schedule and crystallizable mineral, make to be sintered
The mine quality and metallurgical performance of mine are greatly improved.
The present invention does not have special limitation to the method for the ingredient, using sinter well known to those skilled in the art
Distribution carries out ingredient.In the present invention, the method for the ingredient is preferred are as follows:
Raw materials for sintering is subjected to mix.
In the present invention, the raw materials for sintering includes mineral aggregate, flux and fuel.In the present invention, the mineral aggregate, solvent and
Quality of fuel is than being preferably (80~85): (9.5~11.0): (5.5~6.0), more preferably (81~84): (9.7~
10.8): (5.6~5.9), most preferably (82~83): (10~10.3): (5.7~5.8).
In the present invention, the mineral aggregate includes high-chromic vanadium-titanium ferroferrite, it is also preferable to include import resources (Mauritanian mine),
High-grade iron ore, limonite and gas ash, more preferably high-chromic vanadium-titanium ferroferrite, import resources (Mauritanian mine), high-grade
Iron ore, limonite and gas ash.In the present invention, the high-chromic vanadium-titanium ferroferrite, import resources (Mauritanian mine), high-grade
The mass ratio of iron ore, limonite and gas ash is preferably (50~54): (7~10): (16~18): (2~2.5): (1.8~
2.2), more preferably (50.5~53.5): (7.3~9.7): (16.2~17.8): (2.1~2.4): (1.9~2.1), it is optimal
It is selected as (51~52): (7.3~9.7): (16.8~17.2): (2.2~2.3): 2.
The present invention does not have special limitation, preferably red lattice vanadium titanium to the type of the high-chromic vanadium-titanium ferroferrite and source
Magnetic iron ore.In the present invention, the mass content of full iron is preferably 53~56% in the high-chromic vanadium-titanium ferroferrite, more preferably
54~55%.In the present invention, the mass content of FeO is preferably 30~35% in the high-chromic vanadium-titanium ferroferrite, more preferably
It is 31~34%, most preferably 32~33%.In the present invention, V in the high-chromic vanadium-titanium ferroferrite2O5Mass content it is excellent
It is selected as 0.1~1%, more preferably 0.3~0.7%, most preferably 0.5~0.6%.In the present invention, the high-chromic vanadium titanium
Cr in magnetic iron ore2O3Mass content more a height of 0.55~0.82%, preferably 0.6~0.8%, more preferably 0.65~
0.75%, it is 8~10 times of common vanadium titano-magnetite.In the present invention, SiO in the high-chromic vanadium-titanium ferroferrite2Quality
Content is lower, and preferably 3~4%, more preferably 3.4~3.6%, most preferably 3.45%, 2 percentage points lower than common concentrate
More than.In the present invention, TiO in the high-chromic vanadium-titanium ferroferrite2Mass content be preferably 10~13%, more preferably 11
~12%；It is suitable with the Ti content in common vanadium titano-magnetite.
In the present invention, due to not only containing titanium, but also also higher chromium, while SiO in high-chromic vanadium-titanium ferroferrite2
Content it is lower, Cr2O3It is high-melting-point mineral, fusing point reaches 2400 DEG C, and this high-chromic vanadium-titanium ferroferrite produces during the sintering process
Raw Silicate Binding Phase content is less, and sintering difficulty is sintered greater than common mine, also greater than common vanadic-titanomagnetite sintering.
In the present invention, the import resources are preferably Mauritanian fine ore, can be bought and be obtained by market.In the present invention,
The mass content of full iron is preferably 57~60% in Mauritius's fine ore, and more preferably 58~59%；The Mauritius
The mass content of FeO is preferably 4~6.5% in fine ore, and more preferably 4.5~6.0%；SiO in Mauritius's fine ore2's
Mass content is preferably 12.5~14.5%, and more preferably 13.0~14.0%, most preferably 13.5%.
In the present invention, the high-grade iron ore is preferably domestic high-grade iron ore；The high-grade total Iron in Iron Ore
Mass content is preferably 59~62%, and more preferably 60~61%；The mass content of FeO is preferably 17 in the high-grade iron ore
~20%, more preferably 18~19%；SiO in the high-grade iron ore2Mass content be preferably 7~10%, more preferably 8
~9%.
In the present invention, the preferably middle grade limonite of the limonite, the brown powder as in can be bought by market and be obtained.?
In the present invention, the mass content of full iron is preferably 42~46% in the limonite, and more preferably 43~45%；The limonite
The mass content of middle FeO is preferably 4.5~6.5%, and more preferably 4.8~6.0%, most preferably 5.0~5.7%；It is described brown
SiO in iron ore2Mass content be preferably 14~17%, more preferably 14.5~16.5%, most preferably 15.5%.
In the present invention, the gas ash is iron-bearing auxiliary material, can realize waste utilization using gas ash, reduce to environment
It influences.In the present invention, the mass content of full iron is preferably 35~45% in the gas ash, and more preferably 38~42%, most
Preferably 40%；Carbon content is preferably 8~20% in the gas ash, and more preferably 10~18%, most preferably 13~15%.
The present invention does not have special limitation to the source of the gas ash, what the gas ash can be generated directly using blast furnace and steel-making
Solid waste can also be bought by market and be obtained.
In the present invention, the flux is preferably lime stone, active lime and quick lime.In the present invention, the lime
The mass ratio of stone, active lime and quick lime is preferably (3.7~4.3): (1.8~2.2): (4.0~4.5), more preferably
(3.8~4.2): (1.85~2.15): (4.1~4.4), most preferably (3.9~4.1): (1.9~2.1): (4.2~4.3).
In the present invention, the main component of the lime stone is calcium carbonate, the oxygen of general also a small amount of iron, magnesium, aluminium, silicon
Compound can be bought by market and be obtained.
In the present invention, the active lime is the active lime commonly used in the art in sintering process, also known as high anti-
Answer lime or soft burnt lime, be a kind of higher lime of purity, specific bulk density is small, the porosity it is high (generally 50% with
On), crystallization is thin, intensity is big, large specific surface area, the features such as sulfur content is small and reagency is strong, be widely used in sintering process
In.In the present invention, the mass content of CaO is preferably 90~95% in the active lime, and more preferably 91~94%, it is optimal
It is selected as 92~93%；The activity degree of the active lime is preferably 280~400mL, more preferably 300~380mL, most preferably
330~350mL；It can be bought and be obtained by market.In the present invention, the activity degree is usually with the reaction speed of lime and water come table
Show, that is, at normal atmospheric pressure, in 10min, 50g lime is dissolved in the milli of consumed 4N HCL aqueous solution in 40 DEG C of thermostatted waters
Rise number.
The present invention does not have special limitation to the type of the quick lime and source, and use is well known to those skilled in the art
Quick lime can be bought by market and be obtained.
In the present invention, the fuel is preferably coke powder and/or anthracite.
The present invention does not have special limitation to the specific method of described plus water mixing, and use is well known to those skilled in the art
The technical solution that raw materials for sintering plus water are mixed.The present invention preferably by the raw material prepared respectively sintering primary mixer and
It is sintered in second drum mixer plus water mixes, obtain mixture.
The dosage of the water preferably makes the mass content 7.52~7.63% of moisture in the mixture in the present invention,
More preferably 7.55%, 7.57%, 7.59% or 7.61%.Since high-chromic vanadium-titanium ferroferrite coarse size balling-up is bad, lead to
The granularmetric composition of mixture can be improved by crossing moisture content in raising mixture, the gas permeability of the bed of material be improved, to improve sintering
Mineral products quality.
In the present invention, the dosage of the mineral aggregate, flux and fuel preferably makes the quality of the mixed carbon comtent in the mixture
Content is 5.6~5.9%, more preferably 5.65%, 5.7%, 5.75% or 5.85%.The present invention, which improves in mixture, matches carbon
Amount can satisfy in sintering feed after moisture content improves to the increased demand of sintering heat, improves sintering temperature, promotes mineral
Fusing bonding is conducive to the intensity for improving sinter.
The present invention does not have special limitation to the method for the pelletizing, using pelletizing technology well known to those skilled in the art
Scheme, by obtained mixture in mixing machine pelletizing.In the present invention, the granularity of the pelletizing obtained after the pelletizing is excellent
It is selected as 3.0~8.0mm, more preferably 4~7mm, most preferably 5~6mm.
The present invention is sintered using the method for igniting oxygen-enriched sintering.The present invention does not have the method for the igniting oxygen-enriched sintering
There is special limitation, using the technical solution of igniting oxygen-enriched sintering well known to those skilled in the art.The present invention preferably will
Pelletizing is packed on sintering pallet after pelletizing, passes through the oxygen mask oxygen that blowing mass concentration is 1.5~3% on sintering charge level
Gas carries out igniting oxygen-enriched sintering.
In the present invention, the bed depth when igniting oxygen-enriched sintering is preferably 670~710mm, more preferably 680~
700mm, most preferably 660mm, 680mm, 700mm or 720mm.The bed depth when present invention improves sintering can extend the bed of material
High-temperature holding time, keep crystallizable mineral more abundant, be conducive to increase sintering liquid content, improve the mineral composition of sinter
And structure, the intensity and yield rate of sinter are improved, simultaneously because the auto accumulation heat of sintering process acts on enhancing, burning can be increased
The heat of ramming material layer supplies and reduces the consumption of fuel.
In the present invention, the oxygen quality concentration when ignition sintering is preferably 1.8~2.8%, more preferably 2~
2.5%, most preferably 1.5%, 2.0%, 2.5% or 3%.Oxygen-enriched sintering can increase through air stream in the bed of material in the present invention
Oxygen content, reinforce macroscopical oxidizing atmosphere, fuel combustion is more abundant, accelerates sintering velocity, improves combustion
Layer temperature is burnt, sintering liquid phase is promoted to be formed, more high-quality calcium ferrite Binder Phases is generated, improves mineral composition and the knot of sinter
Structure improves Sintering Yield, quality.
In the present invention, the firing temperature of the ignition sintering be 1150~1165 DEG C, preferably 1152~1163 DEG C, more
Preferably 1155 DEG C；The duration of ignition is 2.5~2.7min, preferably 2.55~2.65min, more preferably 2.5~2.6min.
The sintering method of high-chromic vanadium-titanium ferroferrite provided by the invention is by the complex optimum to technological parameter, various
Sintering process can be improved under the comprehensive function of process conditions, generate more Binder Phase contents, improve the mineral group of sinter
At and structure, reduce pulverization rate of the sinter in blast furnace ironmaking process, improve sinter quality to reach and improve
Its metallurgical performance reduces the purpose of fuel consumption.
The sintering method of high-chromic vanadium-titanium ferroferrite provided by the invention can improve mix size composition, improve material
The gas permeability of layer, to improve sinter quality；Sintering temperature can be improved, promote the fusing adhesion of mineral, production is more
Binder Phase, be conducive to improve sintering strength；The effect of sinter bed auto accumulation heat, high temperature hold time can be enhanced, be conducive to
The mineral composition and structure for improving sinter, improve Sintering Operation Index, while can reduce fuel consumption；Be conducive to generate more
More Binder Phases makes up because of high-chromic vanadium-titanium ferroferrite SiO2Content is low to cause sinter Silicate Binding Phase to reduce to intensity
Cloth influences, to improve the intensity and yield rate of sinter, reduces solid fuel consumption；Sinter reproducibility can be improved,
Be conducive to improve the technical-economic index of blast furnace process.
Raw material used in following embodiment of the present invention is commercial goods, high-chromic vanadium-titanium ferroferrite used at subpackage
It includes: the SiO of the FeO of the TFe of 55.25wt%, 30.96wt%, 3.19wt%2, the V of 0.61wt%2O5, 11.81wt%'s
TiO2, the Cr of 0.71wt%2O3, it is red lattice vanadium titano-magnetite.
The ingredient of Mauritius's mine used includes: the TFe, the SiO of the FeO of 5.2wt%, 13.8wt% of 58.75wt%2,
The V of < 0.05wt%2O5, the TiO of 0.205wt%2；For Mauritanian fine ore.
The ingredient of high-grade iron ore used includes: the TFe of 60.06wt%, the FeO of 19.46wt%, 9.25wt%'s
SiO2, the V of 0.078wt%2O5, 0.050 TiO2；For the high-grade fine ore of Central Asia iron ore company production.
The ingredient of limonite used includes: the TFe of 44.63wt%, the SiO of the FeO of 5.5wt%, 16.37wt%2,
The V of 0.066wt%2O5, the TiO of 0.73wt%2；To be purchased from brown powder in the iron ore mine Hu Gu of Xichang.
Gas ash composition used includes: the TFe of 37.10wt%, the SiO of the FeO of 10.29wt%, 7.26wt%2,
The V of 0.039wt%2O5, the TiO of 0.293wt%2；It produces for Pan Gang group Pan Gang vanadium Co., Ltd's iron-smelter and steel mill.
The carbon content of coke powder used is 84.6wt%, and volatilization is divided into 2.12wt%, ash content 13.16wt%, to climb steel
The screenings that coal chemical industry company produces.
The mass content of CaO is 95% in active lime used, activity degree 350mL.
The mass content of CaO is 84% in quick lime used, activity degree 220mL.
The mass content of CaO is 53.96% in lime stone used.
The test method of Binder Phase total content is that mating plate is made in sinter in the present invention, and observation is burnt under an optical microscope
Tie the quantity of Binder Phase in mine.
Sintered ore rotary drum strength according to GB8209-87 " sinter and pellet-drum strength measuring method " standard into
Row test.
The calculation method of yield rate are as follows: poured out after sinter is burned, carry out natural cooling, fallen 2 times from 2m eminence, carried out
Screening, takes the percentage meter yield rate of > 10mm grain size content.
Medium temperature reduction degree in the present invention is on the basis of ferric iron state, i.e., the iron in hypothesis iron ore is all with Fe2O3Shape
Formula exists, and with these Fe2O3In oxygen can be regarded as 100%, the degree of deoxidation achieved after a certain period of time is restored, with quality hundred
Fraction representation.It is measured according to GB/T13241 " measuring method of reducibility of iron ore ".The index is higher, illustrates sinter
Reproducibility in blast furnace is better, then blast furnace yield is higher, fuel consumption is lower.
Comparative example 1
Ingredient is carried out according to the mineral aggregate, flux and coke powder that mass ratio is 83.65:10.5:5.85；
The mineral aggregate includes that mass ratio is the high-chromic vanadium-titanium ferroferrite of 53:9.0:17.45:2.2:2.0, Mauritius
Mine, high-grade iron ore, limonite and gas ash；
The solvent includes the lime stone and active lime, quick lime that mass ratio is 4.1:2.1:4.3.
Raw materials for sintering after ingredient is added in primary mixer and second drum mixer to water mixing respectively, obtains mixture；
Biodiversity content is 7.3% in the mixture；Mixed carbon comtent in the mixture is 5.3%.
Obtained mixture is caused, pelletizing is formed；The granularity of the pelletizing is 1~2mm.
Obtained pelletizing is added on sintering pallet and carries out cloth, makes bed depth 640mm；It is in firing temperature
1100 DEG C of down-firing 2min are sintered, and obtain sinter.
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that comparative example 1 of the present invention is prepared is tested
Total content is 31.2%, drum strength 70.5%, yield rate 73.4%, yield 458t/h, and solid fuel consumption is
51.68kg/t mine, medium temperature reduction degree (RI) are 76.56%.
Embodiment 1
Mixture is prepared according to the method for comparative example 1；Biodiversity content is 7.55% (increase in the mixture
Moisture dosage improves the moisture content in mixture)；Mixed carbon comtent in the mixture is 5.65% (increase coke powder dosage raising
Mixed carbon comtent in mixture).
Obtained mixture is caused, pelletizing is formed；The granularity of the pelletizing is 3~8mm.
Obtained pelletizing is added on sintering pallet and carries out cloth, makes bed depth 660mm.
The oxygen for being 1.5% to sintering charge level blowing mass concentration, firing temperature be 1152 DEG C of down-firing 2.55min into
Row sintering, obtains sinter.
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that the embodiment of the present invention 1 is prepared is tested
Total content is 33.2%, drum strength 71.33%, yield rate 75.07%, yield 468t/h, and solid fuel consumption is
50.58kg/t mine, medium temperature reduction degree (RI) are 77.73%.
Compared with comparative example 1, Binder Phase total content increases by 2% in the sinter that the embodiment of the present invention 1 is prepared, rotary drum
Intensity improves 0.83%, and yield rate improves 1.67%, and output increased 2.18%, solid fuel consumption declines 1.10kg/t mine, in
Warm reduction degree improves 1.17%.
Embodiment 2
Sinter is prepared according to the method for embodiment 1, unlike the first embodiment, the biodiversity content in mixture
It is 7.57%, mixed carbon comtent 5.7%；Bed depth is 680mm, the oxygen that sintering charge level blowing mass concentration is 2.0%.
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that the embodiment of the present invention 2 is prepared is tested
Total content is 34.4%, drum strength 71.65%, yield rate 75.67%, yield 472t/h, and solid fuel consumption is
49.87kg/t mine, medium temperature reduction degree (RI) are 78.90%.
Compared with comparative example 1, Binder Phase total content increases by 3.2% in the sinter that the embodiment of the present invention 2 is prepared, and turns
Drum intensity improves 1.15%, and yield rate improves 2.27%, and output increased 3.06%, solid fuel consumption declines 1.81kg/t mine,
Medium temperature reduction degree improves 2.34%.
Embodiment 3
Sinter is prepared according to the method for embodiment 1, unlike the first embodiment, the biodiversity content in mixture
It is 7.59%, mixed carbon comtent 5.75%；Bed depth is 700mm, the oxygen that sintering charge level blowing mass concentration is 2.5%.
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that the embodiment of the present invention 3 is prepared is tested
Total content is 35.5%, drum strength 72.06%, yield rate 76.27%, yield 475.8t/h, solid fuel consumption
For 49.44kg/t mine, medium temperature reduction degree (RI) is 79.62%.
Compared with comparative example 1, Binder Phase total content increases by 4.3% in the sinter that the embodiment of the present invention 3 is prepared, and turns
Drum intensity improves 1.56%, and yield rate improves 2.87%, and output increased 3.90%, solid fuel consumption declines 2.24kg/t mine,
Medium temperature reduction degree improves 3.06%.
Embodiment 4
Sinter is prepared according to the method for embodiment 1, unlike the first embodiment, the biodiversity content in mixture
It is 7.61%, mixed carbon comtent 5.85%；Bed depth is 720mm, the oxygen that sintering charge level blowing mass concentration is 3.0%.
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that the embodiment of the present invention 4 is prepared is tested
Total content is 36.2%, drum strength 72.42%, yield rate 76.64%, yield 478.1t/h, solid fuel consumption
For 48.99kg/t mine, medium temperature reduction degree (RI) is 80.79%.
Compared with comparative example 1, Binder Phase total content increases by 5% in the sinter that the embodiment of the present invention 4 is prepared, rotary drum
Intensity improves 1.92%, and yield rate improves 3.24%, and output increased 4.39%, solid fuel consumption declines 2.69kg/t mine, in
Warm reduction degree improves 4.23%.
Comparative example 2
Sinter is prepared according to the method that embodiment 4 provides, as different from Example 4, the mixed carbon comtent of mixture is
5.0% (reducing the mixed carbon comtent in coke powder dosage reduction mixture).
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that comparative example 2 of the present invention is prepared is tested
Total content is 35.62%, drum strength 72.18%, yield rate 76.31%, yield 476.4t/h, solid fuel consumption
For 49.13kg/t mine, medium temperature reduction degree (RI) is 80.46%.
Comparative example 3
Sinter is prepared according to the method that embodiment 4 provides, as different from Example 4, the mixed carbon comtent of mixture is
6.2%.
According to method described in above-mentioned technical proposal, the Binder Phase for the sinter that comparative example 3 of the present invention is prepared is tested
Total content is 36.07%, drum strength 72.33%, yield rate 76.50%, yield 477.6t/h, solid fuel consumption
For 49.35kg/t mine, medium temperature reduction degree (RI) is 79.72%.
As seen from the above embodiment, the present invention provides a kind of sintering methods of high-chromic vanadium-titanium ferroferrite, comprising: will burn
Tie feed proportioning；Add water to mix the raw materials for sintering after ingredient, obtains mixture；By ignition sintering after mixture pelletizing；It is special
Sign is, Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content be 3~
4%；Moisture content is 7.55~7.61% in the mixture, and mixed carbon comtent is 5.65~5.85%；When the ignition sintering
Bed depth is 660~720mm, and oxygen quality concentration is 1.5~3%.The present invention is comprehensive by carrying out to the technological parameter of sintering
Optimization is closed, during the sintering process under the comprehensive function of various process conditions, when effectively improving high-chromic vanadium-titanium ferroferrite sintering
Mixture composition and sinter component, enhance sintering atmosphere, have the mine quality of sinter and metallurgical performance larger
Raising.
What has been described above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of sintering method of high-chromic vanadium-titanium ferroferrite, comprising:
By raw materials for sintering ingredient；
Add water to mix the raw materials for sintering after ingredient, obtains mixture；
By ignition sintering after mixture pelletizing；
It is characterized in that,
The ingredient of the high-chromic vanadium-titanium ferroferrite includes: the FeO of 30 ~ 35wt%；The V of 0.1 ~ 1wt%2O5；0.55 ~ 0.82wt%'s
Cr2O3；The SiO of 3 ~ 4wt%2；The TiO of 10 ~ 13wt%2；
The mass content of moisture is 7.5 ~ 7.65% in the mixture, is 5.6 ~ 5.9% with carbon mass content；
The bed depth when ignition sintering is 660 ~ 720mm, and oxygen quality concentration is 1.5 ~ 3%；
The firing temperature of the ignition sintering is 1152 ~ 1163 DEG C；
The duration of ignition of the ignition sintering is 2.5 ~ 2.7min；
The raw materials for sintering includes mineral aggregate, flux and fuel；
The mineral aggregate includes high-chromic vanadium-titanium ferroferrite, import resources, high-grade iron ore, limonite and gas ash；
The high-chromic vanadium-titanium ferroferrite, import resources, high-grade iron ore, limonite and gas ash mass ratio be (50 ~ 54): (7
~ 10): (16 ~ 18): (2 ~ 2.5): (1.8 ~ 2.2)；
The flux includes lime stone, active lime and quick lime；The mass ratio of the lime stone, active lime and quick lime is
(3.7 ~ 4.3): (1.8 ~ 2.2): (4.0 ~ 4.5)；
The fuel includes coke powder and/or anthracite；
The mineral aggregate, flux and quality of fuel ratio are (80 ~ 85): (9.5 ~ 11.0): (5.6 ~ 5.9).
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| CN101041867A (en) * | 2007-02-02 | 2007-09-26 | 攀枝花钢铁(集团)公司 | Sintering method for high-chromic vanadium-titanium ferroferrite |
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| CN105177279A (en) * | 2015-08-21 | 2015-12-23 | 东北大学 | Method for improving quality of high-chromium vanadium and titanium sinter |
| CN105648208A (en) * | 2016-04-06 | 2016-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Sintering method of high-chromium type vanadium titano-magnetite |
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| CN104630451A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Preparation method of high-chromium vanadium-titanium sintered mixed pellet material |
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