CN107130106A - 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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- 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
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Abstract
The invention provides a kind of sintering method of high-chromic vanadium-titanium ferroferrite, including：By raw materials for sintering dispensing；Raw materials for sintering after dispensing is added water mixing, compound is obtained；By sintering of being lighted a fire after compound pelletizing；Characterized in that, Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content be 3~4%；Moisture is 7.5~7.65% in the compound, and mixed carbon comtent is 5.5~6.0%；Bed depth during the igniting sintering is 660~720mm, and oxygen quality concentration is 1.5~3%.The present invention carries out complex optimum by the technological parameter to sintering, in sintering process under the comprehensive function of various process conditions, compound when effectively improving high-chromic vanadium-titanium ferroferrite sintering is constituted and sintering deposit component, sintering atmosphere is enhanced, the ore deposit quality and metallurgical performance of sintering deposit is greatly improved.
Description
Technical field
The present invention relates to vanadium iron magnetite technical field, more particularly to a kind of sintering method of high-chromic vanadium-titanium ferroferrite.
Background technology
Panzhihua high-titanium type vanadium-titanium magnetite sintering is global problem.Due to the ore deposit coarse size, containing higher titanium,
Fusing point is high, not easy-sintering, and crisp perovskite of generating property etc. in 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 quite, but also contains higher chromium, the grade (Cr of chromium2O30.55%~0.82%) it 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
Low (the SiO of amount2It is content 3.45%, lower than common concentrate more than 2 percentage points) the characteristics of, the silicate produced in sintering process glues
Knot phase content is less, and unique composition determines that the difficulty of red lattice high-chromic vanadium-titanium ferroferrite sintering is not only greater than common ore deposit and burnt
Knot, also greater than Panzhihua high-titanium type vanadium-titanium magnetite sintering.
The advantage of steel is climbed in resource, the exploitation of red lattice high-chromic vanadium-titanium ferroferrite, which are related to, climbs following development of steel.
It is economical, efficiently extensive to smelt Hongge Deposit, also need the existing flow of blast furnace process using smelting process technology maturation.Therefore, attack
Gram high-chromic vanadium-titanium ferroferrite sintering difficulty is the key link that red lattice high-chromic vanadium-titanium ferroferrite is developed, research and development wound
The high-chromic vanadium-titanium ferroferrite sintering technology of new property has very important effect to breaking through these difficult points.At present, on Gao Ge
The research of type vanadic-titanomagnetite sintering reinforcement technique has not been reported.
The content of the invention
In view of this, it is an object of the invention to provide a kind of sintering method of high-chromic vanadium-titanium ferroferrite, the present invention is carried
The method of confession can prepare the higher sintering deposit of quality.
The invention provides a kind of sintering method of high-chromic vanadium-titanium ferroferrite, including：
By raw materials for sintering dispensing；
Raw materials for sintering after dispensing is added water mixing, compound is obtained；
By sintering of being lighted a fire after compound pelletizing；
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 compound, is 5.5~6.0% with carbon mass content；
Bed depth during the igniting sintering is 660~720mm, and oxygen quality concentration is 1.5~3%；
The firing temperature of the igniting sintering is 1150~1165 DEG C.
The duration of ignition of the igniting sintering is 2.5~2.7min.
It is preferred that, the composition of the high-chromic vanadium-titanium ferroferrite includes：
30~35wt% FeO；
0.1~1wt% V2O5；
0.55~0.82wt% Cr2O3；
3~4wt% SiO2；
10~13wt% TiO2。
It is preferred that, 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.
It is preferred that, the high-chromic vanadium-titanium ferroferrite, import resources, high-grade iron ore, the mass ratio of 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).
It is preferred that, the flux includes lime stone, active lime and quick lime.
It is preferred that, 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).
It is preferred that, the fuel includes coke powder and/or anthracite.
It is preferred that, 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 compound, while improving sintering process
In bed depth, using sintering technologies such as oxygen-enriched sinterings, complex optimum is carried out to the technological parameter of sintering.
Because high-chromic vanadium-titanium ferroferrite coarse size balling-up is bad, it can be improved by improving moisture in compound
The granularmetric composition of compound, improves the gas permeability of the bed of material, so as to improve Sintering Operation Index；Improve compound in mixed carbon comtent and
Firing temperature, the extension duration of ignition disclosure satisfy that in sintering feed that moisture, to the increased demand of sintering heat, is improved after improving
Sintering temperature, promotes the fusing of mineral to bond, and is conducive to improving the intensity of sintering deposit；Bed depth when improving sintering can prolong
The high-temperature holding time of the long bed of material, makes crystallizable mineral more abundant, is conducive to increase sintering liquid content, improves the ore deposit of sintering deposit
Thing the Nomenclature Composition and Structure of Complexes, improves the intensity and yield rate of sintering deposit, simultaneously because the auto accumulation heat effect enhancing of sintering process, can be with
The heat of increase sinter bed supplies and reduces the consumption of fuel；Present invention increase passes through the oxygen content of air stream in the bed of material, makes
Macroscopical oxidizing atmosphere is strengthened 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 are generated, improves mineral composition and the structure of sintering deposit, improves sintering deposit
Yield and quality.
Under the comprehensive function of present invention process conditions various in sintering process, high-chromic vanadium-titanium ferroferrite is effectively improved
Compound composition and sintering deposit component during sintering, enhance sintering atmosphere, flux mineralising, sintering schedule and crystallizable mineral etc.
Sintering process, makes the ore deposit quality and metallurgical performance of sintering deposit be greatly improved.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
Technical staff it is improved or retouching all other example, belong to the scope of protection of the invention.
The invention provides a kind of sintering method of high-chromic vanadium-titanium ferroferrite, including：
By raw materials for sintering dispensing；
Raw materials for sintering after dispensing is added water mixing, compound is obtained；
By sintering of being lighted a fire after compound pelletizing；
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 compound, is 5.5~6.0% with carbon mass content；
Bed depth during the igniting sintering is 660~720mm, and oxygen quality concentration is 1.5~3%；
The firing temperature of the igniting sintering is 1152~1163 DEG C.
The duration of ignition of the igniting sintering is 2.55~2.65min.
The present invention improves firing temperature, the extension duration of ignition, carried simultaneously by improving moisture and mixed carbon comtent in compound
Bed depth during height sintering, using sintering technologies such as oxygen-enriched sinterings, complex optimum is carried out to the technological parameter of sintering,
In sintering process under the comprehensive function of various process conditions, compound group during high-chromic vanadium-titanium ferroferrite sintering is effectively improved
Into with sintering deposit component, enhance the sintering processes such as sintering atmosphere, solvent mineralising, sintering schedule and crystallizable mineral, make sintering
The ore deposit quality and metallurgical performance of ore deposit are greatly improved.
The present invention does not have special limitation to the method for the dispensing, using sintering deposit well known to those skilled in the art
Distribution carries out dispensing.In the present invention, the method for the dispensing is preferably：
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), be most preferably (82~83)：(10~10.3)：(5.7~5.8).
In the present invention, the mineral aggregate include high-chromic vanadium-titanium ferroferrite, preferably also include import resources (Mauritanian ore deposit),
High-grade iron ore, limonite and gas ash, more preferably high-chromic vanadium-titanium ferroferrite, import resources (Mauritanian ore deposit), high-grade
Iron ore, limonite and gas ash.In the present invention, the high-chromic vanadium-titanium ferroferrite, import resources (Mauritanian ore deposit), 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
Elect as (51~52)：(7.3~9.7)：(16.8~17.2)：(2.2~2.3)：2.
The present invention does not have special limitation to the species of the high-chromic vanadium-titanium ferroferrite and source, preferably red lattice vanadium titanium
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, FeO mass content is preferably 30~35% in the high-chromic vanadium-titanium ferroferrite, more preferably
For 31~34%, most preferably 32~33%.In the present invention, V in the high-chromic vanadium-titanium ferroferrite2O5Mass content it is excellent
Elect 0.1~1%, more preferably 0.3~0.7%, most preferably 0.5~0.6% as.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 relatively low, and preferably 3~4%, more preferably 3.4~3.6%, most preferably 3.45%, it is lower than common concentrate 2 percentage points
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 in high-chromic vanadium-titanium ferroferrite, and there is higher chromium, while SiO2
Content it is relatively low, Cr2O3It is high-melting-point mineral, fusing point reaches 2400 DEG C, and this high-chromic vanadium-titanium ferroferrite is produced in sintering process
Raw Silicate Binding Phase content is less, and it sinters difficulty and sintered more than common ore deposit, also greater than common vanadic-titanomagnetite sintering.
In the present invention, the import resources are preferably Mauritanian fine ore, can be bought and obtained by market.In the present invention,
The mass content of full iron is preferably 57~60% in the Mauritanian fine ore, and more preferably 58~59%；The Mauritius
FeO mass content is preferably 4~6.5% in fine ore, and more preferably 4.5~6.0%；SiO in the Mauritanian fine ore2's
Mass content is preferably 12.5~14.5%, 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%；FeO mass content 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 limonite is preferably middle grade limonite, the brown powder as in, can be bought and obtained by market.
In the present invention, the mass content of full iron is preferably 42~46% in the limonite, and more preferably 43~45%；The limonite
Middle FeO mass content is preferably 4.5~6.5%, 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, and twice laid can be realized using gas ash, is reduced to environment
Influence.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, more preferably 10~18%, most preferably 13~15%.
The present invention is to the source of the gas ash without special limitation, and the gas ash directly using blast furnace and can make steel what is produced
Solid waste, can also be bought by market and 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), be 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, typically also has a small amount of iron, magnesium, aluminium, the oxygen of silicon
Compound, can be bought by market and obtained.
In the present invention, the active lime is the active lime commonly used in the art in sintering process, is 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, specific surface area is big, sulfur content is small and the features such as strong reagency, is widely used in sintering process
In.In the present invention, CaO mass content is preferably 90~95% in the active lime, and more preferably 91~94%, it is optimal
Elect 92~93% as；The activity degree of the active lime is preferably 280~400mL, more preferably 300~380mL, is most preferably
330~350mL；It can be bought and obtained by market.In the present invention, the usual reaction speed with lime and water of the activity degree is come table
Show, that is, at normal atmospheric pressure, in 10min, 50g lime is dissolved in the milli that 4N HCl/water solution is consumed in 40 DEG C of thermostatted waters
Rise number.
The present invention does not have special limitation to the species of the quick lime and source, using well known to those skilled in the art
Quick lime, can be bought by market and 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 the mixing that adds water, using well known to those skilled in the art
Raw materials for sintering is added water the technical scheme of mixing.The present invention preferably by the raw material prepared respectively sintering primary mixer and
Add water mixing in sintering second drum mixer, obtains compound.
The consumption of the water preferably makes the mass content of moisture in the compound be 7.52~7.63% in the present invention,
More preferably 7.55%, 7.57%, 7.59% or 7.61%.Because high-chromic vanadium-titanium ferroferrite coarse size balling-up is bad, lead to
The granularmetric composition of compound can be improved by crossing moisture in raising compound, the gas permeability of the bed of material be improved, so as to improve sintering
Mineral products quality.
In the present invention, the consumption of the mineral aggregate, flux and fuel preferably makes the quality of the mixed carbon comtent in the compound
Content is 5.6~5.9%, more preferably 5.65%, 5.7%, 5.75% or 5.85%.The present invention, which is improved in compound, matches somebody with somebody carbon
Amount disclosure satisfy that promotes mineral after moisture is improved in sintering feed to the increased demand of sintering heat, raising sintering temperature
Fusing is bonded, and is conducive to improving the intensity of sintering deposit.
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 compound in mixer pelletizing.In the present invention, the granularity of the pelletizing obtained after the pelletizing is excellent
Elect 3.0~8.0mm, most preferably more preferably 4~7mm, 5~6mm as.
The present invention is sintered using the method for igniting oxygen-enriched sintering.The present invention does not have to the method for the igniting oxygen-enriched sintering
There is special limitation, using the technical scheme of igniting oxygen-enriched sintering well known to those skilled in the art.The present invention preferably will
Pelletizing loads on sintering pallet after pelletizing, the oxygen for being 1.5~3% to injection mass concentration on sintering charge level by oxygen mask
Gas carries out igniting oxygen-enriched sintering.
In the present invention, the bed depth during 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, make crystallizable mineral more abundant, be conducive to increase sintering liquid content, improve sintering deposit mineral composition
And structure, the intensity and yield rate of sintering deposit are improved, simultaneously because the auto accumulation heat effect enhancing of sintering process, can increase burning
The heat of ramming material layer supplies and reduces the consumption of fuel.
In the present invention, the oxygen quality concentration during igniting 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 by air stream in the bed of material in the present invention
Oxygen content, strengthen in sintering process macroscopical oxidizing atmosphere, fuel combustion is more abundant, accelerate sintering velocity, improve combustion
Layer temperature is burnt, promotes sintering liquid phase to be formed, generates more high-quality calcium ferrite Binder Phases, improves mineral composition and the knot of sintering deposit
Structure, improves Sintering Yield, quality.
In the present invention, it is described igniting sintering firing temperature be 1150~1165 DEG C, preferably 1152~1163 DEG C, more
Preferably 1155 DEG C；The duration of ignition is 2.5~2.7min, more preferably preferably 2.55~2.65min, 2.5~2.6min.
The sintering method for the high-chromic vanadium-titanium ferroferrite that the present invention is provided is by the complex optimum to technological parameter, various
Sintering process can be improved under the comprehensive function of process conditions, more Binder Phase contents are generated, improve the mineral group of sintering deposit
Into and structure, pulverization rate of the sintering deposit in blast furnace ironmaking process is reduced, so as to reach raising sintering deposit quality and improve
Its metallurgical performance, reduces the purpose of fuel consumption.
The sintering method for the high-chromic vanadium-titanium ferroferrite that the present invention is provided, can improve compound granularmetric composition, improve material
The gas permeability of layer, so as to improve sintering deposit quality；Sintering temperature can be improved, promotes the fusing adhesion of mineral, is produced more
Binder Phase, be conducive to improve sintering strength；The effect of sinter bed auto accumulation heat, high temperature hold time can be strengthened, be conducive to
Improve mineral composition and the structure of sintering deposit, improve Sintering Operation Index, while fuel consumption can be reduced；Be conducive to generation more
Many Binder Phases, make up because of high-chromic vanadium-titanium ferroferrite SiO2Content is low to cause the reduction of sintering deposit Silicate Binding Phase to intensity
Cloth influences, so as to improve the intensity and yield rate of sintering deposit, reduces solid fuel consumption；Sintering deposit reproducibility can be improved,
Be conducive to improving the technical-economic index of blast furnace process.
Raw material used in following examples of the present invention is commercial goods, high-chromic vanadium-titanium ferroferrite used into subpackage
Include：55.25wt% TFe, 30.96wt% FeO, 3.19wt% SiO2, 0.61wt% V2O5, 11.81wt%'s
TiO2, 0.71wt% Cr2O3, it is red lattice vanadium titano-magnetite.
The composition of Mauritanian ore deposit used includes：58.75wt% TFe, 5.2wt% FeO, 13.8wt% SiO2,
＜ 0.05wt% V2O5, 0.205wt% TiO2；For Mauritanian fine ore.
The composition of high-grade iron ore used includes：60.06wt% TFe, 19.46wt% FeO, 9.25wt%'s
SiO2, 0.078wt% V2O5, 0.050 TiO2；The high-grade fine ore produced for Central Asia iron ore company.
The composition of limonite used includes：44.63wt% TFe, 5.5wt% FeO, 16.37wt% SiO2,
0.066wt% V2O5, 0.73wt% TiO2；To be purchased from brown powder in the Hu Gu iron ore mines of Xichang.
Gas ash composition used includes：37.10wt% TFe, 10.29wt% FeO, 7.26wt% SiO2,
0.039wt% V2O5, 0.293wt% TiO2；It is that Pan Gang groups Pan Gang vanadium Co., Ltd's iron-smelter and steel mill are produced.
The carbon content of coke powder used is 84.6wt%, and volatilization is divided into 2.12wt%, and ash content is 13.16wt%, to climb steel
The screenings of coal chemical industry company production.
CaO mass content is 95% in active lime used, and activity degree is 350mL.
CaO mass content is 84% in quick lime used, and activity degree is 220mL.
CaO mass content is 53.96% in lime stone used.
Is mating plate is made in sintering deposit by the method for testing of Binder Phase total content in the present invention, and observation under an optical microscope is burnt
Tie the quantity of Binder Phase in ore deposit.
Sintered ore rotary drum strength is according to GB8209-87《The assay method of sintering deposit and pellet-drum strength》Standard is entered
Row test.
The computational methods of yield rate are：Poured out after sintering deposit is burned, carry out natural cooling, fallen 2 times from 2m eminences, carried out
Screening, takes the percentage meter yield rate of ＞ 10mm grain size contents.
Middle 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 is present, and with these Fe2O3In oxygen can be regarded as 100%, the degree of the deoxidation reached after reduction certain time, with quality hundred
Fraction representation.According to GB/T13241《The assay method of reducibility of iron ore》It is measured.The index is higher, illustrates sintering deposit
Reproducibility in blast furnace is better, then blast furnace yield is higher, fuel consumption is lower.
Comparative example 1
It is 83.65 according to mass ratio：10.5：5.85 mineral aggregate, flux and coke powder carries out dispensing；
It is 53 that the mineral aggregate, which includes mass ratio,：9.0：17.45：2.2：2.0 high-chromic vanadium-titanium ferroferrite, Mauritius
Ore deposit, high-grade iron ore, limonite and gas ash；
It is 4.1 that the solvent, which includes mass ratio,：2.1：4.3 lime stone and active lime, quick lime.
Raw materials for sintering after dispensing is added water mixing in primary mixer and second drum mixer respectively, compound is obtained；
Biodiversity content is 7.3% in the compound；Mixed carbon comtent in the compound is 5.3%.
Obtained compound is caused, pelletizing is formed；The granularity of the pelletizing is 1~2mm.
Obtained pelletizing is added on sintering pallet and carries out cloth, it is 640mm to make bed depth；It is in firing temperature
1100 DEG C of down-firing 2min are sintered, and obtain sintering deposit.
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that comparative example 1 of the present invention is prepared is tested
Total content is 31.2%, and drum strength is 70.5%, and yield rate is 73.4%, and yield is 458t/h, and solid fuel consumption is
51.68kg/t ore deposits, middle temperature reduction degree (RI) is 76.56%.
Embodiment 1
Method according to comparative example 1 prepares compound；Biodiversity content is 7.55% (increase in the compound
Moisture consumption improves the moisture in compound)；Mixed carbon comtent in the compound is 5.65% (increase coke powder consumption raising
Mixed carbon comtent in compound).
Obtained compound is caused, pelletizing is formed；The granularity of the pelletizing is 3~8mm.
Obtained pelletizing is added on sintering pallet and carries out cloth, it is 660mm to make bed depth.
The oxygen for being 1.5% to sintering charge level injection mass concentration, is that 1152 DEG C of down-firing 2.55min enter in firing temperature
Row sintering, obtains sintering deposit.
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that the test embodiment of the present invention 1 is prepared
Total content is 33.2%, and drum strength is 71.33%, and yield rate is 75.07%, and yield is 468t/h, and solid fuel consumption is
50.58kg/t ore deposits, middle temperature reduction degree (RI) is 77.73%.
Compared with comparative example 1, Binder Phase total content increase by 2%, rotary drum in the sintering deposit that the embodiment of the present invention 1 is prepared
Intensity improves 0.83%, and yield rate improves 1.67%, and output increased 2.18%, solid fuel consumption declines 1.10kg/t ore deposits, in
Warm reduction degree improves 1.17%.
Embodiment 2
Method according to embodiment 1 prepares sintering deposit, as different from Example 1, the biodiversity content in compound
For 7.57%, mixed carbon comtent is 5.7%；Bed depth is 680mm, the oxygen that sintering charge level injection mass concentration is 2.0%.
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that the test embodiment of the present invention 2 is prepared
Total content is 34.4%, and drum strength is 71.65%, and yield rate is 75.67%, and yield is 472t/h, and solid fuel consumption is
49.87kg/t ore deposits, middle temperature reduction degree (RI) is 78.90%.
Compared with comparative example 1, Binder Phase total content increase by 3.2%, turns in the sintering deposit that the embodiment of the present invention 2 is prepared
Drum intensity improves 1.15%, and yield rate improves 2.27%, and output increased 3.06%, solid fuel consumption declines 1.81kg/t ore deposits,
Middle temperature reduction degree improves 2.34%.
Embodiment 3
Method according to embodiment 1 prepares sintering deposit, as different from Example 1, the biodiversity content in compound
For 7.59%, mixed carbon comtent is 5.75%；Bed depth is 700mm, the oxygen that sintering charge level injection mass concentration is 2.5%.
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that the test embodiment of the present invention 3 is prepared
Total content is 35.5%, and drum strength is 72.06%, and yield rate is 76.27%, and yield is 475.8t/h, solid fuel consumption
For 49.44kg/t ore deposits, middle temperature reduction degree (RI) is 79.62%.
Compared with comparative example 1, Binder Phase total content increase by 4.3%, turns in the sintering deposit that the embodiment of the present invention 3 is prepared
Drum intensity improves 1.56%, and yield rate improves 2.87%, and output increased 3.90%, solid fuel consumption declines 2.24kg/t ore deposits,
Middle temperature reduction degree improves 3.06%.
Embodiment 4
Method according to embodiment 1 prepares sintering deposit, as different from Example 1, the biodiversity content in compound
For 7.61%, mixed carbon comtent is 5.85%；Bed depth is 720mm, the oxygen that sintering charge level injection mass concentration is 3.0%.
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that the test embodiment of the present invention 4 is prepared
Total content is 36.2%, and drum strength is 72.42%, and yield rate is 76.64%, and yield is 478.1t/h, solid fuel consumption
For 48.99kg/t ore deposits, middle temperature reduction degree (RI) is 80.79%.
Compared with comparative example 1, Binder Phase total content increase by 5%, rotary drum in the sintering deposit that the embodiment of the present invention 4 is prepared
Intensity improves 1.92%, and yield rate improves 3.24%, and output increased 4.39%, solid fuel consumption declines 2.69kg/t ore deposits, in
Warm reduction degree improves 4.23%.
Comparative example 2
The method provided according to embodiment 4 prepares sintering deposit, and as different from Example 4, the mixed carbon comtent of compound is
5.0% (reducing the mixed carbon comtent in coke powder consumption reduction compound).
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that comparative example 2 of the present invention is prepared is tested
Total content is 35.62%, and drum strength is 72.18%, and yield rate is 76.31%, and yield is 476.4t/h, solid fuel consumption
For 49.13kg/t ore deposits, middle temperature reduction degree (RI) is 80.46%.
Comparative example 3
The method provided according to embodiment 4 prepares sintering deposit, and as different from Example 4, the mixed carbon comtent of compound is
6.2%.
According to the method described in above-mentioned technical proposal, the Binder Phase for the sintering deposit that comparative example 3 of the present invention is prepared is tested
Total content is 36.07%, and drum strength is 72.33%, and yield rate is 76.50%, and yield is 477.6t/h, solid fuel consumption
For 49.35kg/t ore deposits, middle temperature reduction degree (RI) is 79.72%.
As seen from the above embodiment, the invention provides a kind of sintering method of high-chromic vanadium-titanium ferroferrite, including：It will burn
Tie feed proportioning；Raw materials for sintering after dispensing is added water mixing, compound is obtained；By sintering of being lighted a fire after compound pelletizing；It is special
Levy and be, Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content for 3~
4%；Moisture is 7.55~7.61% in the compound, and mixed carbon comtent is 5.65~5.85%；During the igniting sintering
Bed depth is 660~720mm, and oxygen quality concentration is 1.5~3%.The present invention is carried out comprehensive by the technological parameter to sintering
Optimization is closed, in sintering process under the comprehensive function of various process conditions, when effectively improving high-chromic vanadium-titanium ferroferrite sintering
Compound composition and sintering deposit component, enhance sintering atmosphere, making the ore deposit quality and metallurgical performance of sintering deposit has larger
Raising.
Above-described is only the preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of sintering method of high-chromic vanadium-titanium ferroferrite, including：
By raw materials for sintering dispensing；
Raw materials for sintering after dispensing is added water mixing, compound is obtained；
By sintering of being lighted a fire after compound pelletizing；
Characterized in that,
Cr in the high-chromic vanadium-titanium ferroferrite2O3Mass content be 0.55~0.82%, SiO2Mass content for 3~
4%；
The mass content of moisture is 7.5~7.65% in the compound, is 5.5~6.0% with carbon mass content；
Bed depth during the igniting sintering is 660~720mm, and oxygen quality concentration is 1.5~3%；
The firing temperature of the igniting sintering is 1150~1165 DEG C；
It is preferred that, the duration of ignition of the igniting sintering is 2.5~2.7min.
2. according to the method described in claim 1, it is characterised in that the composition of the high-chromic vanadium-titanium ferroferrite includes：
30~35wt% FeO；
0.1~1wt% V2O5；
0.55~0.82wt% Cr2O3；
3~4wt% SiO2；
10~13wt% TiO2。
3. according to the method described in claim 1, it is characterised in that 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.
4. method according to claim 3, it is characterised in that the high-chromic vanadium-titanium ferroferrite, import resources, high grade iron
The mass ratio of ore deposit, limonite and gas ash is (50~54)：(7~10)：(16~18)：(2~2.5)：(1.8~2.2).
5. method according to claim 3, it is characterised in that the flux includes lime stone, active lime and quick lime.
6. method according to claim 5, it is characterised in that the mass ratio of the lime stone, active lime and quick lime
For (3.7~4.3):(1.8~2.2):(4.0~4.5).
7. method according to claim 3, it is characterised in that the fuel includes coke powder and/or anthracite.
8. method according to claim 3, it is characterised in that the mineral aggregate, flux and quality of fuel ratio for (80~
85)：(9.5~11.0)：(5.5~6.0).
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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 |
| CN104630449A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture |
| CN104630451A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Preparation method of high-chromium vanadium-titanium sintered mixed pellet material |
| 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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| 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 |
| CN104630449A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture |
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