CN104762429A - Blast furnace smelting method - Google Patents
Blast furnace smelting method Download PDFInfo
- Publication number
- CN104762429A CN104762429A CN201510180543.0A CN201510180543A CN104762429A CN 104762429 A CN104762429 A CN 104762429A CN 201510180543 A CN201510180543 A CN 201510180543A CN 104762429 A CN104762429 A CN 104762429A
- Authority
- CN
- China
- Prior art keywords
- weight
- blast furnace
- blast
- vanadium
- titanium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a blast furnace smelting method. The method comprises the following steps of (1) sintering sintering raw materials containing 40-60wt% of sea sand vanadium-titanium magnetite concentrate powder and 20-40wt% of non-vanadium-titanium magnetite concentrate powder to obtain an alkaline vanadium-titanium sintered ore; (2) roasting roasting raw materials containing 70-97.5wt% of sea sand vanadium-titanium magnetite concentrate powder and less than 28.5wt% of non-vanadium-titanium magnetite concentrate powder to obtain an acidic vanadium-titanium pellet; and (3) adding blast furnace burden containing the alkaline vanadium-titanium sintered ore, the acidic vanadium-titanium pellet and a non-vanadium-titanium lump ore into a blast furnace to smelt. When the method disclosed by the invention is used for blast furnace smelting, not only can the smooth production of the blast furnace be ensured, but also the total fuel ratio of blast furnace smelting can be effectively reduced and the utilization factor of the blast furnace can be increased.
Description
Technical field
The present invention relates to field of steel-making, particularly, relate to a kind of blast furnace smelting method.
Background technology
The extra large sand vanadium titano-magnetite of Indonesia surrounding area is a kind of typical high ferro height titanium schreyerite, its TFe total amount per-cent > 58%, TiO
2total amount per-cent > 12%, SiO
2total amount per-cent < 1%, is different from existing schreyerite resource completely, because higher TiO is contained in this ore deposit
2, when for blast-furnace smelting, TiO in slag
2higher, and as TiO in slag
2when content is more than 20%, it very easily reduces and generates Low-valent Titanium compound (such as, TiC, TiN and sosoloid Ti (C thereof, N)), TiC, the TiN that can not melt under blast-furnace smelting condition and sosoloid Ti (C, N) thereof are distributed in slag with disperse state with superfine little particle.Along with reducing degree improves gradually, in slag, TiC, TiN and sosoloid Ti (C, N) content thereof constantly increase, and slag viscosity raises gradually, as TiO in slag
2when being reduced to a certain degree, slag viscosity will sharply raise, the viscosity of titanium-containing blast furnace slag significantly raises, mobility be deteriorated, cause Blast furnace slag regardless of, can not slag tap smoothly tap a blast furnace, the working of a furnace worsen, cause furnace condition disorder time serious.In addition, these factors above-mentioned also cause iron-holder in the slag produced in vanadium titano-magnetite blast furnace ironmaking process higher, thus cause a large amount of iron losses, and the loss amount of usual iron, up to 6-8 % by weight, greatly reduces the capacity factor of a blast furnace.
Therefore, for preventing the generation of the blast-furnace slag bonding phenomenon of high-titanium type vanadium-titanium magnetite, TiO in slag must be suppressed
2cross reduction, reduce the generation of TiC, TiN and sosoloid Ti (C, N) thereof in slag.
Up to now, the technology method of extensive blast-furnace smelting sea sand vanadium titano-magnetite is not also carried out in world wide.The present invention in conjunction with the production practice of high titanium type magnetite, defines the blast furnace smelting method of high titanium type sea sand vanadium titano-magnetite by a large amount of experimental studies.
Summary of the invention
The object of the invention is to suppress extra large sand v-ti magnetite concentrate TiC, TiN and sosoloid Ti (C thereof in slag when blast-furnace smelting, N) generation, prevent slag from boning, thus provide a kind of and can ensure that blast furnace stable smooth operation is produced, reduce total fuel ratio of blast-furnace smelting and improve the blast furnace smelting method of the capacity factor of a blast furnace.
To achieve these goals, the invention provides a kind of blast furnace smelting method, the method comprises the following steps:
(1) by the raw materials for sintering sintering containing 40-60 % by weight extra large sand v-ti magnetite concentrate powder and the non-sefstromite concentrate powder of 20-40 % by weight, alkaline vanadium titanium agglomerate is obtained;
(2) by the roasting raw material roasting of the non-sefstromite concentrate powder containing 70-97.5 % by weight extra large sand v-ti magnetite concentrate powder and less than 28.5 % by weight, acid vanadium-titanium pellet is obtained;
(3) allocate the blast furnace burden containing described alkaline vanadium titanium agglomerate, described acid vanadium-titanium pellet and non-vanadium titanium lump ore into blast furnace to smelt.
By technique scheme, present invention obtains following beneficial effect:
1) effectively TiO in blast furnace ironmaking process is suppressed
2cross reduction, prevent the generation because of TiC, TiN in slag and sosoloid Ti (C, N) thereof and cause Blast furnace slag regardless of, can not slag tap smoothly tap a blast furnace, situation that the working of a furnace worsens occurs, and ensures that blast furnace stable smooth operation is produced.
2) under the prerequisite ensureing blast furnace burden quality, the usage ratio of extra large sand v-ti magnetite concentrate powder can be improved, reduce blast-furnace smelting cost.
3) can reduce total fuel ratio of blast-furnace smelting greatly, alleviate the situation of resource anxiety, particularly, the usage quantity of blast furnace fuel can be reduced to 500-580kg/ ton iron;
4) substantially increase the capacity factor of a blast furnace, thus prevent the iron loss of blast furnace ironmaking process, be conducive to the technico-economical comparison improving blast-furnace smelting, particularly, the capacity factor of a blast furnace can bring up to 1.9-2.3 ton iron/m
3d.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of blast furnace smelting method, the method comprises the following steps:
(1) by the raw materials for sintering sintering containing 40-60 % by weight extra large sand v-ti magnetite concentrate powder and the non-sefstromite concentrate powder of 20-40 % by weight, alkaline vanadium titanium agglomerate is obtained;
(2) by the roasting raw material roasting of the non-sefstromite concentrate powder containing 70-97.5 % by weight extra large sand v-ti magnetite concentrate powder and less than 28.5 % by weight, acid vanadium-titanium pellet is obtained;
(3) allocate the blast furnace burden containing described alkaline vanadium titanium agglomerate, described acid vanadium-titanium pellet and non-vanadium titanium lump ore into blast furnace to smelt.
In described method of the present invention, carrying out blast-furnace smelting by alkaline vanadium titanium agglomerate of the present invention, acid vanadium-titanium pellet and non-vanadium titanium lump ore being allocated in blast furnace, TiO in blast-furnace slag can be suppressed
2cross reduction, reduce the generation of blast-furnace slag at a middle or low price titanium (as TiC, TiN and Ti (C, N)), prevent slag from boning; On the one hand, high-Ti type V-Ti magnetite concentrate is overcome in prior art due to TiO
2content is higher, the technological deficiency that blast furnace ironmaking process cannot realize, thus realize blast furnace stable smooth operation production in extra large sand v-ti magnetite concentrate blast furnace ironmaking process, reduce total fuel ratio and improve the object of the capacity factor of a blast furnace, on the other hand, significantly improve the usage ratio of extra large sand v-ti magnetite concentrate in blast furnace ironmaking process, reduce the cost of blast-furnace smelting.
According to the present invention, in step (1), control the proportioning of extra large sand v-ti magnetite concentrate powder in 40-60 % by weight scope, the basicity of alkaline vanadium titanium agglomerate is conducive to control between 1.6-2.2, thus can under the prerequisite of proportioning improving extra large sand vanadium ilmenite concentrate powder, ensure the quality of alkaline vanadium titanium agglomerate, reach the object that stable smooth operation that is that reduce blast-furnace smelting cost and blast furnace is produced.
In the present invention, the preparation method of described alkaline vanadium titanium agglomerate can carry out according to the preparation method of this area routine, such as, the preparation method of described alkaline vanadium titanium agglomerate can be: extra large sand v-ti magnetite concentrate powder of the present invention and non-sefstromite concentrate powder are mixed with fuel (charcoal, coke powder) and flux (unslaked lime and/or Wingdale), be added on chassis through distributor, carry out exhausting igniting sintering, advance with chassis, sintering process is constantly carried out downwards by bed of material surface.The present invention preferably adopts magnetic roller distributor, and the rotation direction of magnetic roller is counterclockwise, and common ore deposit cloth magnetic roller is clockwise rotation direction, adopts this magnetic roller cloth can improve the reasonable layout of compound granularity and fuel, makes the uniform quality of the whole bed of material.The temperature of described sintering can be generally 1280-1380 DEG C.
According to the present invention, in step (2), control the proportioning of extra large sand v-ti magnetite concentrate powder in 70-97.5 % by weight scope, ensureing that the acid vanadium-titanium pellet obtained through sintering has high-quality while, improve the usage ratio of extra large sand v-ti magnetite concentrate powder, the requirement of molten iron vanadiumcontent in blast furnace ironmaking process can be met, for follow-up vanadium extraction from hot metal process provides condition.Simultaneously also can for controlling TiO in blast-furnace slag during blast-furnace smelting
2content and basicity of slag condition is provided, ensure the object that blast furnace stable smooth operation is produced.
In the present invention, the preparation method of described vanadium-titanium pellet can carry out according to the method for this area routine, such as, can grind by v-ti magnetite concentrate powder of the present invention and non-sefstromite concentrate powder and binding agent (as wilkinite etc.) being mixed, moistening, drying, oxidizing roasting and obtaining.Dry method is preferably exhausting drying, wind speed can be 1-1.5 meter per second, and dry initial temperature can be 20-50 DEG C, and preheating temperature can be 400-1000 DEG C, after preheating, the oxidizing roasting temperature of pelletizing can be 1200-1250 DEG C, and the time of roasting can be 25-35min.
In the present invention, the TiO of TFe, the 12-13 % by weight containing 57.5-58.5 % by weight in described extra large sand v-ti magnetite concentrate powder
2, 0.5-0.6 % by weight V
2o
5with the SiO of 0.5-1 % by weight
2.
In the present invention, the effect of the described non-vanadium titanium lump ore of step (3) is according to agglomerate and the proportioning of pellet and the practical situation of smelting, reconciles slag composition, makes TiO in slag further
2content and basicity of slag reach blast-furnace smelting requirement.
Non-sefstromite concentrate powder of the present invention refers to not containing vanadium and titanium elements or only contains the vanadium of trace, the fine iron breeze of titanium elements, particle size is 3-5mm, main component can be: the SiO of CaO, 17-19 % by weight of FeO, 1-1.5 % by weight of the TFe of 46-47 % by weight, 0.8-1 % by weight
2, 0.6-0.8 % by weight the Al of MgO, 5.9-6.1 % by weight
2o
3.Described non-vanadium titanium lump ore refers to not containing vanadium and titanium elements or only contains the vanadium of trace, the iron ore of titanium elements, particle size is 24-32mm, main component is: the SiO of CaO, 26-28 % by weight of FeO, 1-1.2 % by weight of the TFe of 36-38 % by weight, 1-1.2 % by weight
2, 0.3-0.5 % by weight the Al of MgO, 4.8-5.0 % by weight
2o
3.
In the present invention, following " [Ti] " well known in the art is adopted to represent the titanium elements of (that is, molten iron) in melt; In like manner, following " [Si] " represents the element silicon in molten iron.
According to the present invention, in order to ensure that the stable smooth operation of blast furnace is produced further, by reducing the content of [Ti]+[Si] in molten iron to reduce the furnace temperature level of blast-furnace smelting, can reach and reducing TiO in slag
2the temperature of reaction of reduction, plays and suppresses TiO
2the object of the content of reduction, reduction slag middle or low price titanium (as TiC, TiN and Ti (C, N)).Preferably, in the molten iron that obtains of step (3) described blast furnace ironmaking process, the content of [Ti]+[Si] is 0.2-0.5 % by weight.More preferably, in the molten iron that obtains of step (3) described blast furnace ironmaking process, [Ti] is 1-2:1 with the weight ratio of [Si].
According to the present invention, in order to ensure that the stable smooth operation of blast furnace is produced further, preferably, in the blast-furnace slag that step (3) described blast furnace ironmaking process obtains, binary basicity of slag is 1-1.2, and ternary basicity of slag is 1.35-1.5, TiO
2content is 20-24 % by weight.
The consumption of the present invention to step (3) described blast furnace burden neutral and alkali vanadium titanium agglomerate, acid vanadium-titanium pellet and non-vanadium titanium lump ore is not particularly limited, and the consumption of this area routine can be adopted to implement.The object that the stable smooth operation reduce blast-furnace smelting cost for better reaching, ensureing blast furnace is produced, under preferable case, the consumption of the described alkaline vanadium titanium agglomerate of step (3), acid vanadium-titanium pellet and non-vanadium titanium lump ore makes the content of TFe in blast furnace burden be 48-54 % by weight.In preferred situation, with the gross weight of described blast furnace burden for benchmark, the consumption of described alkaline vanadium titanium agglomerate is 60-85 % by weight, and the consumption of described acid vanadium-titanium pellet is less than 30 % by weight, and the consumption of described non-vanadium titanium lump ore is less than 10 % by weight.
To the detailed process of described blast-furnace smelting, there is no particular limitation in the present invention, and the ordinary method according to this area blast-furnace smelting can be followed to implement.In order to more easily control the content of [Ti] in described molten iron+[Si] in scope of the present invention, the stable smooth operation of further guarantee blast furnace is produced, preferably, step (3) described blast-furnace smelting carries out under the existence of coke, and blasts hot blast by the air port of blast furnace to fuel injection in blast furnace in smelting process.
To the consumption of described coke and described fuel, all there is no particular limitation in the present invention, suitably can select from the blast furnace smelting method of routine.Under preferable case, the consumption of described coke is 400-450kg/ ton iron, and the consumption of described fuel is 100-150kg/ ton iron.Unit " kg/ ton iron " refers to relative to the consumption tapped a blast furnace per ton.Such as, " the winding-up amount of described fuel is 100kg/ ton iron " refers to that blast furnace often taps a blast furnace 1 ton, needs fuel described in 100kg of jetting in blast furnace.
In the present invention, described fuel can be the various fuel injections that this area routine uses, such as, can be Sweet natural gas, heavy oil, coal dust etc.Under preferable case, described fuel is coal dust.The not special requirement of coal of described coal dust can be such as at least one in hard coal, bituminous coal and brown coal.
In the present invention, the condition blasting hot blast in described blast furnace is not particularly limited, but in order to add the blast energy of blast furnace, enlivens blast furnace center and edge twice air-flow, strengthens oxygen enrichment percentage in stove, effectively suppresses TiO in slag further
2cross reduction, reduce the generation of TiC, TiN and Ti (C, N) in slag, improve slag fluidity, preferably, described in blast hot blast condition comprise: hot blast temperature is 1200-1250 DEG C, and hot-blast pressure is 200-400kPa, and hot blast wind speed is 180-250m/s.Further preferably, described hot blast consumption is 1300-1600m
3/ ton iron, the oxygen enrichment in hot blast accounts for 1-4 % by weight.
Below in conjunction with embodiment, the invention will be further described, but scope of the present invention is not limited in following examples.
In following preparation example and embodiment, the main component of extra large sand v-ti magnetite concentrate powder is: containing the TFe of 58.22 % by weight, the TiO of 12.64 % by weight
2, the V of 0.576 % by weight
2o
5, the SiO of 0.73 % by weight
2;
The average particle size particle size of non-sefstromite concentrate powder is 3.18mm, and main component is: the TFe of 46 % by weight, the FeO of 0.8 % by weight, the CaO of 1.5 % by weight, 17 % by weight SiO
2, the MgO of 0.6 % by weight, the Al of 5.9 % by weight
2o
3, described particle size refers to the maximum linear distance between two differences on particle, and such as, when particle is spherical, then described particle size refers to the diameter of this particle;
Non-vanadium titanium lump ore purchased from average particle size particle size be 25.8mm, main component is: the TFe of 36 % by weight, the FeO of 1.2 % by weight, the CaO of 1 % by weight, 26 % by weight SiO
2, the MgO of 0.3 % by weight, the Al of 4.8 % by weight
2o
3;
In coke, carbon content is 84.56 % by weight, and volatilization is divided into 1.45 % by weight, ash content is 13.61 % by weight;
In raw lime stone, calcium oxide content is 88 % by weight;
Bentonitic Absorbance ratio-derivative method is 33.5g/100g, and colloid index is 99%, and expansion capacity is 12.5ml/g;
Anthracitic carbon content is 79.28 % by weight, and volatilization is divided into 9.35 % by weight, ash content is 11.37 % by weight;
The carbon content of bituminous coal is 69.79 % by weight, and volatilization is divided into 17.63 % by weight, ash content is 12.58 % by weight.
In following examples:
The capacity factor of a blast furnace refers to the product iron of blast furnace every day of unit volume, and therefore, the described capacity factor of a blast furnace can calculate according to the product iron of the volume of blast furnace and blast furnace every day;
Total fuel ratio calculates according to following calculating formula: the add-on (kg/ ton iron) of winding-up amount (kg/ ton the iron)+coke of total fuel ratio (kg/ ton iron)=coal dust.
Preparation example 1: the preparation of alkaline vanadium titanium agglomerate
Cloth is carried out by the unslaked lime left magnetic roller distributor of the extra large sand v-ti magnetite concentrate powder of 50 weight parts, the non-sefstromite concentrate powder of 30 weight parts, the coke powder of 5 weight parts and 15 weight parts, control bed depth is 650mm, and be added on chassis, then in the long sinter machine for 80m of drying grate, 38min is sintered, controlling sintering temperature is 1350 DEG C, sintering machine speed is 2.1m/min, vertical sintering speed is 21.6mm/min, obtain alkaline vanadium titanium agglomerate, the mean particle size of this alkaline vanadium titanium agglomerate is 20.5mm, and barrate strength is 73%.
Described barrate strength is the ISO barrate strength according to GB13242 definition, refers to get 7.5 kilograms of 40-10mm agglomerate in ISO drum unit (SQZG--4 type; Hebi City metallurgical machinery equipment company limited) in rotate after 200 turns, > 6.3mm grade agglomerate accounts for the per-cent of whole agglomerate weight, is the important indicator weighing sinter strength, higher, represents that the intensity of agglomerate is better.
Contrast preparation example 1: the preparation of the vanadium titanium agglomerate of reference
Vanadium titanium agglomerate is prepared according to the method for preparation example 1, difference is, the consumption of sea sand v-ti magnetite concentrate powder is 70 weight parts, the consumption of non-sefstromite concentrate powder is 10 weight parts, obtain alkaline vanadium titanium agglomerate, the mean particle size of this alkaline vanadium titanium agglomerate is 15.1mm, and barrate strength is 62%.
Preparation example 2: the preparation of acid vanadium-titanium pellet
By the extra large sand v-ti magnetite concentrate powder of 84 weight parts, the non-sefstromite concentrate powder of 14 weight parts and the wilkinite of 2 weight parts, load Large Electric mixer (HXDH-15L; Shangyu Hongxing Mechanical Instrumentation Produce Co., Ltd.) in mix, load large-size ball mill (ASM type horizontal ball mill after mixing; Wuxi City hypo drying machinery instrument factory) interior profit mill, utilize balling disc (Tangshan Tang Ye step-down gear manufactures limited liability company) pelletizing, dry in the upper exhausting of drying grate (Jiaozuo City Zheng Yuan Machinery Manufacturing Co., Ltd.), wind speed is 1.5m/s, and dry initial temperature is 50 DEG C, and preheating temperature is 600 DEG C, roasting in rotary kiln, maturing temperature is 1200 DEG C, and roasting 25min, obtains vanadium-titanium pellet.The ultimate compression strength of this vanadium-titanium pellet is 2510N/.
Contrast preparation example 2: the preparation of the vanadium-titanium pellet of reference
Prepare vanadium-titanium pellet according to the method for preparation example 2, difference is, the consumption of extra large sand v-ti magnetite concentrate powder is 30 weight parts, and the consumption of non-sefstromite concentrate powder is 68 weight parts, obtains vanadium-titanium pellet, and the ultimate compression strength of this vanadium-titanium pellet is 2450N/.
Embodiment 1
The present embodiment is for illustration of blast furnace smelting method of the present invention.
It is 1500m that the vanadium-titanium pellet prepared according to above-mentioned preparation example 2 of the non-vanadium titanium lump ore of the alkaline vanadium titanium agglomerate prepared according to above-mentioned preparation example 1 of 60 weight parts, 10 weight parts, 30 weight parts and coke are added to volume
3blast furnace in smelt, wherein, the consumption of described alkaline vanadium titanium agglomerate, acid vanadium-titanium pellet and non-vanadium titanium lump ore makes the content of TFe in blast furnace burden be 50.8 weight parts.By coal dust by Blast Furnace Injection in blast furnace, and in blast furnace, blasting hot blast, (in hot blast, Rich Oxygen Amount is 480m
3/ ton iron, hot blast consumption is 1600m
3/ ton iron), the winding-up amount of described coal dust is 100kg/ ton iron, and the add-on of coke is 420kg/ ton iron, and controlling hot blast temperature is 1250 DEG C, and hot-blast pressure is 350-360kPa, and hot blast wind speed is 220-230m/s.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.2 % by weight, and [Ti] and [Si] weight ratio are 2:1; TiO in the blast-furnace slag obtained
2content be 23 % by weight, binary basicity of slag is 1.2, and ternary basicity of slag is 1.45.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 1.3 % by weight, always fuel ratio is 520kg/ ton iron and the capacity factor of a blast furnace is 2.3 tons of iron/m
3d, can ensure that blast furnace stable smooth operation is produced, meet the requirement of blast-furnace smelting good technique economic target completely.
Comparative example 1
This comparative example is for illustration of the blast furnace smelting method of reference.
Adopt the method identical with embodiment 1 to carry out blast-furnace smelting, difference is, the vanadium titanium agglomerate prepared by the contrast preparation example 1 of identical weight replaces the alkaline vanadium titanium agglomerate of embodiment 1.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.24%, and [Ti] and [Si] weight ratio are 1:1; TiO in the blast-furnace slag obtained
2content be 23.7 % by weight, binary basicity of slag is 1.3, and ternary basicity of slag is 1.55.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 2 % by weight, and breathability of stock column for blast furnace worsens, and piezometric strained relations in stove, affect blast furnace and normally produce.
Comparative example 2
This comparative example is for illustration of the blast furnace smelting method of reference.
Adopt the method identical with embodiment 1 to carry out blast-furnace smelting, difference is, the vanadium-titanium pellet prepared by the contrast preparation example 2 of identical weight replaces the acid vanadium-titanium pellet of embodiment 1.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.08%, and [Ti] and [Si] weight ratio are 1:1; TiO in the blast-furnace slag obtained
2content be 20.5 % by weight, binary basicity of slag is 0.9, and ternary basicity of slag is 1.25.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 1 % by weight, and in blast furnace, furnace temperature is not enough, and cause slag iron difficulty point, piezometric strained relations in stove, affect blast furnace and normally produce.
Embodiment 2
The present embodiment is for illustration of blast furnace smelting method of the present invention.
It is 1500m that the vanadium-titanium pellet prepared according to above-mentioned preparation example 2 of the non-vanadium titanium lump ore of the alkaline vanadium titanium agglomerate prepared according to above-mentioned preparation example 1 of 75 weight parts, 10 weight parts, 25 weight parts and coke are added to volume
3blast furnace in smelt, wherein, the consumption of described alkaline vanadium titanium agglomerate, acid vanadium-titanium pellet and non-vanadium titanium lump ore makes the content of TFe in blast furnace burden be 51.2 weight parts.By coal dust by Blast Furnace Injection in blast furnace, and in blast furnace, blasting hot blast, (in hot blast, Rich Oxygen Amount is 300m
3/ ton iron, hot blast consumption is 1500m
3/ ton iron), the winding-up amount of described coal dust is 110kg/ ton iron, and the add-on of coke is 440kg/ ton iron, and controlling hot blast temperature is 1250 DEG C, and hot-blast pressure is 345-355kPa, and hot blast wind speed is 210-220m/s.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.35 % by weight, and [Ti] and [Si] weight ratio are 1.5:1; TiO in the blast-furnace slag obtained
2content be 22 % by weight, binary basicity of slag is 1.1, and ternary basicity of slag is 1.4.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 1.2 % by weight, always fuel ratio is 550kg/ ton iron and the capacity factor of a blast furnace is 2.25 tons of iron/m
3d, can ensure that blast furnace stable smooth operation is produced, meet the requirement of blast-furnace smelting good technique economic target completely.
Embodiment 3
The present embodiment is for illustration of blast furnace smelting method of the present invention.
It is 1500m that the vanadium-titanium pellet prepared according to above-mentioned preparation example 2 of the non-vanadium titanium lump ore of the alkaline vanadium titanium agglomerate prepared according to above-mentioned preparation example 1 of 85 weight parts, 0 weight part, 15 weight parts and coke are added to volume
3blast furnace in smelt, wherein, the consumption of described alkaline vanadium titanium agglomerate, acid vanadium-titanium pellet and non-vanadium titanium lump ore makes the content of TFe in blast furnace burden be 49.8 weight parts.By coal dust by Blast Furnace Injection in blast furnace, and in blast furnace, blasting hot blast, (in hot blast, Rich Oxygen Amount is 140m
3/ ton iron, hot blast consumption is 1400m
3/ ton iron), the winding-up amount of described coal dust is 120kg/ ton iron, and the add-on of coke is 440kg/ ton iron, and controlling hot blast temperature is 1250 DEG C, and hot-blast pressure is 340-350kPa, and hot blast wind speed is 200-210m/s.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.5 % by weight, and [Ti] and [Si] weight ratio are 1:1; TiO in the blast-furnace slag obtained
2content be 21 % by weight, binary basicity of slag is 1.1, and ternary basicity of slag is 1.3.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 1.1 % by weight, always fuel ratio is 560kg/ ton iron and the capacity factor of a blast furnace is 2.2 tons of iron/m
3d, can ensure that blast furnace stable smooth operation is produced, meet the requirement of blast-furnace smelting good technique economic target completely.
Embodiment 4
The present embodiment is for illustration of blast furnace smelting method of the present invention.
Adopt the method identical with embodiment 1 to carry out blast-furnace smelting, difference is, the winding-up amount of coal dust is 80kg/ ton iron.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.1 % by weight, and [Ti] and [Si] weight ratio are 1:1; TiO in the blast-furnace slag obtained
2content be 22 % by weight, binary basicity of slag is 1.18, and ternary basicity of slag is 1.43.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 1.3 % by weight, always fuel ratio is 500kg/ ton iron and the capacity factor of a blast furnace is 1.9 tons of iron/m
3d, can ensure that blast furnace stable smooth operation is produced, meet the requirement of blast-furnace smelting good technique economic target.
Embodiment 5
Adopt the method identical with embodiment 1 to carry out blast-furnace smelting, difference is, hot blast consumption is 1100m
3/ ton iron.
In the molten iron that above-mentioned smelting process obtains, the content of [Ti]+[Si] is 0.6 % by weight, and [Ti] and [Si] weight ratio are 1:1; TiO in the blast-furnace slag obtained
2content be 22.5 % by weight, binary basicity of slag is 1.21, and ternary basicity of slag is 1.46.
In above-mentioned smelting process, in the slag of generation, the total content of TiC, TiN and Ti (C, N) is 1.5 % by weight, always fuel ratio is 580kg/ ton iron and the capacity factor of a blast furnace is 1.95 tons of iron/m
3d, can ensure that blast furnace stable smooth operation is produced, meet the requirement of blast-furnace smelting good technique economic target.
As can be seen from the result of above embodiment and comparative example, blast furnace stable smooth operation is produced to adopt blast furnace smelting method of the present invention to ensure; In addition, can also reduce total fuel ratio of blast-furnace smelting greatly, particularly, total fuel ratio can be reduced to 500-580kg/ ton iron; Also significantly improve the capacity factor of a blast furnace, particularly, the capacity factor of a blast furnace can bring up to 1.9-2.3 ton iron/m simultaneously
3d.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (10)
1. a blast furnace smelting method, the method comprises the following steps:
(1) by the raw materials for sintering sintering containing 40-60 % by weight extra large sand v-ti magnetite concentrate powder and the non-sefstromite concentrate powder of 20-40 % by weight, alkaline vanadium titanium agglomerate is obtained;
(2) by the roasting raw material roasting of the non-sefstromite concentrate powder containing 70-97.5 % by weight extra large sand v-ti magnetite concentrate powder and less than 28.5 % by weight, acid vanadium-titanium pellet is obtained;
(3) allocate the blast furnace burden containing described alkaline vanadium titanium agglomerate, described acid vanadium-titanium pellet and non-vanadium titanium lump ore into blast furnace to smelt.
2. method according to claim 1, wherein, in the molten iron that step (3) described blast furnace ironmaking process obtains, the content of [Ti]+[Si] is 0.2-0.5 % by weight.
3. method according to claim 2, wherein, in the molten iron that step (3) described blast furnace ironmaking process obtains, [Ti] is 1-2:1 with the weight ratio of [Si].
4. method according to claim 1, wherein, in the blast-furnace slag that step (3) described blast furnace ironmaking process obtains, binary basicity of slag is 1-1.2, and ternary basicity of slag is 1.35-1.5, TiO
2content is 20-24 % by weight.
5. according to the method in claim 1-4 described in any one, wherein, the consumption of the described alkaline vanadium titanium agglomerate of step (3), acid vanadium-titanium pellet and non-vanadium titanium lump ore makes the content of TFe in blast furnace burden be 48-54 % by weight.
6. method according to claim 5, wherein, with the gross weight of described blast furnace burden for benchmark, the consumption of described alkaline vanadium titanium agglomerate is 60-85 % by weight, the consumption of described acid vanadium-titanium pellet is less than 30 % by weight, and the consumption of described non-vanadium titanium lump ore is less than 10 % by weight.
7. according to the method in claim 1-4 described in any one, wherein, step (3) described blast-furnace smelting carries out under the existence of coke, and blasts hot blast by the air port of blast furnace to fuel injection in blast furnace in smelting process.
8. method according to claim 7, wherein, the consumption of described coke is 400-450kg/ ton iron, and the consumption of described fuel is 100-150kg/ ton iron.
9. method according to claim 7, wherein, described in blast hot blast condition comprise: hot blast temperature is 1200-1250 DEG C, and hot-blast pressure is 200-400kPa, and hot blast wind speed is 180-250m/s.
10. method according to claim 7, wherein, described hot blast consumption is 1300-1600m
3/ ton iron, the oxygen enrichment in hot blast accounts for 1-4 volume %.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510180543.0A CN104762429A (en) | 2015-04-16 | 2015-04-16 | Blast furnace smelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510180543.0A CN104762429A (en) | 2015-04-16 | 2015-04-16 | Blast furnace smelting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104762429A true CN104762429A (en) | 2015-07-08 |
Family
ID=53644519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510180543.0A Pending CN104762429A (en) | 2015-04-16 | 2015-04-16 | Blast furnace smelting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104762429A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148613A (en) * | 2016-08-08 | 2016-11-23 | 攀钢集团西昌钢钒有限公司 | The blast-furnace smelting method for vanadium titano-magnetite of hearth erosion situation at the bottom of regulating stove |
| CN106244750A (en) * | 2016-08-08 | 2016-12-21 | 四川德胜集团钒钛有限公司 | The method of blast furnace process schreyerite under high-coal ratio |
| CN107419046A (en) * | 2017-07-24 | 2017-12-01 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for preventing the clinker accumulation of high-chromic vanadium-titanium ferroferrite cupola well center |
| CN108504803A (en) * | 2018-05-10 | 2018-09-07 | 四川德胜集团钒钛有限公司 | A kind of technique improving Coal Injection Amount into BF |
| CN108950111A (en) * | 2018-08-13 | 2018-12-07 | 攀枝花市立宇矿业有限公司 | High-grade blast-furnace smelting method for vanadium titano-magnetite |
| CN108950115A (en) * | 2018-09-20 | 2018-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of blast furnace smelting method of vanadium titano-magnetite |
| CN110578024A (en) * | 2019-10-22 | 2019-12-17 | 山西太钢不锈钢股份有限公司 | Method for improving pressure difference in blast furnace high pellet smelting furnace |
| CN115896367A (en) * | 2022-11-09 | 2023-04-04 | 四川德胜集团钒钛有限公司 | Blast furnace smelting method of vanadium titano-magnetite |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260444A (en) * | 2008-04-15 | 2008-09-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace iron-smelting method |
| CN101476001A (en) * | 2008-12-18 | 2009-07-08 | 攀钢集团成都钢铁有限责任公司 | Method for smelting medium titanium slag by blast furnace |
| CN101775451A (en) * | 2010-03-26 | 2010-07-14 | 中南大学 | Blast-furnace smelting method for vanadium titano-magnetite |
| CN102051421A (en) * | 2009-10-27 | 2011-05-11 | 攀钢集团钢铁钒钛股份有限公司 | Blast furnace burden and blast furnace iron-making method adopting same |
| CN102206719A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace |
| CN103725812A (en) * | 2013-11-27 | 2014-04-16 | 攀钢集团西昌钢钒有限公司 | Blast furnace burden and method for improving comprehensive feeding grade of vanadium titano-magnetite blast furnace |
| CN104087693A (en) * | 2014-07-31 | 2014-10-08 | 四川德胜集团钒钛有限公司 | Low-grade vanadium-titanium magnetite smelting technique |
-
2015
- 2015-04-16 CN CN201510180543.0A patent/CN104762429A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260444A (en) * | 2008-04-15 | 2008-09-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace iron-smelting method |
| CN101476001A (en) * | 2008-12-18 | 2009-07-08 | 攀钢集团成都钢铁有限责任公司 | Method for smelting medium titanium slag by blast furnace |
| CN102051421A (en) * | 2009-10-27 | 2011-05-11 | 攀钢集团钢铁钒钛股份有限公司 | Blast furnace burden and blast furnace iron-making method adopting same |
| CN101775451A (en) * | 2010-03-26 | 2010-07-14 | 中南大学 | Blast-furnace smelting method for vanadium titano-magnetite |
| CN102206719A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace |
| CN103725812A (en) * | 2013-11-27 | 2014-04-16 | 攀钢集团西昌钢钒有限公司 | Blast furnace burden and method for improving comprehensive feeding grade of vanadium titano-magnetite blast furnace |
| CN104087693A (en) * | 2014-07-31 | 2014-10-08 | 四川德胜集团钒钛有限公司 | Low-grade vanadium-titanium magnetite smelting technique |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148613A (en) * | 2016-08-08 | 2016-11-23 | 攀钢集团西昌钢钒有限公司 | The blast-furnace smelting method for vanadium titano-magnetite of hearth erosion situation at the bottom of regulating stove |
| CN106244750A (en) * | 2016-08-08 | 2016-12-21 | 四川德胜集团钒钛有限公司 | The method of blast furnace process schreyerite under high-coal ratio |
| CN106244750B (en) * | 2016-08-08 | 2018-09-07 | 四川德胜集团钒钛有限公司 | The method of blast furnace process schreyerite under high-coal ratio |
| CN107419046A (en) * | 2017-07-24 | 2017-12-01 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for preventing the clinker accumulation of high-chromic vanadium-titanium ferroferrite cupola well center |
| CN108504803A (en) * | 2018-05-10 | 2018-09-07 | 四川德胜集团钒钛有限公司 | A kind of technique improving Coal Injection Amount into BF |
| CN108950111A (en) * | 2018-08-13 | 2018-12-07 | 攀枝花市立宇矿业有限公司 | High-grade blast-furnace smelting method for vanadium titano-magnetite |
| CN108950115A (en) * | 2018-09-20 | 2018-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of blast furnace smelting method of vanadium titano-magnetite |
| CN110578024A (en) * | 2019-10-22 | 2019-12-17 | 山西太钢不锈钢股份有限公司 | Method for improving pressure difference in blast furnace high pellet smelting furnace |
| CN110578024B (en) * | 2019-10-22 | 2021-03-12 | 山西太钢不锈钢股份有限公司 | Method for improving pressure difference in blast furnace high pellet smelting furnace |
| CN115896367A (en) * | 2022-11-09 | 2023-04-04 | 四川德胜集团钒钛有限公司 | Blast furnace smelting method of vanadium titano-magnetite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104762429A (en) | Blast furnace smelting method | |
| CN103361453B (en) | Blast-furnace smelting method for vanadium-titanium magnetite | |
| CN104894313B (en) | A kind of method of vanadium titano-magnetite blast furnace process | |
| CN101775451B (en) | Blast-furnace smelting method for vanadium titano-magnetite | |
| CN101260444B (en) | Blast furnace iron-smelting method | |
| CN102206718B (en) | Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method | |
| CN102978312B (en) | Blast furnace smelting process used for high-vanadium-titanium low-MgO furnace slag | |
| CN102051421A (en) | Blast furnace burden and blast furnace iron-making method adopting same | |
| CN103981310B (en) | A kind of method of smelting vanadium-titanium magnetite by blast furnace | |
| CN101638698B (en) | Method for smelting vanadium-titanium magnetite by blast furnace | |
| CN101665871A (en) | Method for producing titanium carbide slag | |
| CN106011341B (en) | The method that blast furnace process schreyerite carries high-coal ratio | |
| CN104862441A (en) | Method for separating and recovering iron, vanadium and titanium in vanadium-titanium magnetite | |
| CN106282453A (en) | A kind of method of sefstromite blast furnace process | |
| CN104561534A (en) | Magnesium containing fluxed oxide pellets and preparation method thereof | |
| CN108998606B (en) | The blast furnace ferrous burden structure that a kind of pellet and Metallurgical Properties of Sinter are distributed rationally | |
| CN104278146B (en) | A kind of sintering flux preparation method for iron ore sintering | |
| CN104328242A (en) | Steelmaking method of high-phosphorus molten iron containing vanadium-titanium | |
| CN104878143A (en) | Blast furnace smelting method of vanadium titano-magnetite | |
| CN106191351A (en) | A kind of method of blast furnace ironmaking | |
| CN107488784A (en) | A kind of blast furnace ironmaking superfluxed pellets and its production method | |
| CN103509940B (en) | Carbon-containing pellet for manufacturing low-sulfur granular iron | |
| CN107586903A (en) | A kind of blast furnace process furnace charge and blast furnace smelting method | |
| CN101921909B (en) | Method for controlling ferrous oxide content in sintering ore | |
| CN111100982B (en) | Process for smelting manganese-rich slag from high-aluminum lean-manganese iron ore and high-sulfur coke |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150708 |
|
| RJ01 | Rejection of invention patent application after publication |