CN107299169B - The calculation method of blast furnace short term damping-down material - Google Patents
The calculation method of blast furnace short term damping-down material Download PDFInfo
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Abstract
The present invention relates to a kind of calculation methods of blast furnace short term damping-down material, belong to technical field of blast furnace ironmaking, the described method comprises the following steps: determining shaft furnace charging volume；With actual production conditions, the weight of sky charge needed for calculating Damping Down Charge of Blast and the compressed volume of regular burden(ing) batch weight；With the total coke ratio of damping down material of damping down period corresponding to the calculating in a linear relationship of the total coke ratio of damping down material short term damping-down time；It is balanced with shaft furnace charging volume balance and coke ratio and determines damping down material concrete composition.The Damping Down Charge of Blast that the calculation method of the blast furnace short term damping-down material obtained using the present invention is obtained, blast furnace opening can not only be obviously shortened to the production time is reached, greatly reduce the waste of manpower and material resources, and it calculates simply, conveniently, and computer programming can be carried out and realize that automation calculates, make to calculate more accurately, more rapidly.
Description
Technical field
The present invention relates to technical field of blast furnace ironmaking more particularly to a kind of calculation methods of blast furnace short term damping-down material.
Background technique
Blast furnace staying refers to blast furnace in iron-making production because scheduled overhaul, processing accident or other reasons etc. are to blast furnace
Process that is out-of-blast and interrupting production.Blast furnace staying divides long term blowing-down and short term damping-down, wherein the damping down time at 16 hours
Within damping down be divided into short term damping-down, and the damping down time is then long term blowing-down in 16 hours or more damping down.Generally have in short term
The furnace charge for being different from normally producing can be added in the damping down of plan before damping down into blast furnace, during playing supplement blast furnace staying
Thermal loss, making blast furnace, the working of a furnace can fast quick-recovery after multiple wind.
Under present circumstances, the working experience that worker is in accordance with oneself is added a certain amount of net burnt and normal into blast furnace
Material, with the thermal loss of blast furnace during supplementing damping down.But net burnt and regular burden(ing) the amount of addition is often held bad, causes
Furnace temperature is high or low after furnace compound wind, slows down the recovery of conditions of blast furnace, thus can give in production and cause certain loss.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of calculation method of blast furnace short term damping-down material, the blast furnace is short-term
The calculation method of damping down material can determine the amount of specific damping down material in blast furnace short term damping-down according to the damping down time, it can be ensured that blast furnace
After multiple wind the working of a furnace can fast quick-recovery to normal, and reach expected Control for Kiln Temperature requirement.
It is of the invention the technical solution adopted is that: the calculation method of blast furnace short term damping-down material, comprising the following steps:
A, shaft furnace charging volume is determined:
Selected blast furnace, calculates shaft furnace charging volume, and calculation formula is as shown in Equation 1,
VBlast furnace=VBosh+VFurnace bosh+VShaft+VFurnace throat (1)
Wherein, VBlast furnaceFor shaft furnace charging volume, VBosh、VFurnace bosh、VShaftThe blast-furnace bosh being respectively calculated by blast furnace size
Volume, belly of blast furnace volume and blast-furnace shaft volume, VFurnace throatBlast furnace throat volume to calculate by blast furnace size subtracts furnace throat stockline
The volume that above section volume obtains；
B, with actual production conditions, the weight of sky charge needed for calculating Damping Down Charge of Blast and the compressed volume of regular burden(ing) batch weight:
Sky material is coke, and regular burden(ing) is coke, comprehensive iron ore, manganese ore, the mixture with flux, and the coke batch weight of empty material
It is identical as coke batch weight contained in regular burden(ing)；
It is set according to actual production STRENGTH ON COKE batch weight, balances to obtain regular burden(ing) using the iron balance and manganese of professional standard
Middle comprehensive mine batch weight and manganese ore batch weight；And using the clinker dual alkalinity of single batch of regular burden(ing) as definite value, to flux batch weight in regular burden(ing)
It is determined；
The compressed volume of coke is calculated with coke batch weight, coke bulk density and furnace charge compression ratio, calculation formula is such as
Shown in formula 2,
VCoke=MCoke/ρCoke× (1-C) (2)
Wherein, VCokeFor the compressed volume of coke batch weight, MCokeFor coke batch weight, ρCokeFor coke bulk density, C is furnace charge
Compression ratio；
The compressed volume of comprehensive mine is calculated to integrate mine batch weight, comprehensive mine bulk density and furnace charge compression ratio, calculates
Formula is as shown in Equation 3,
VComprehensive mine=MComprehensive mine/ρComprehensive mine× (1-C) (3)
Wherein, VComprehensive mineFor the comprehensive compressed volume of mine batch weight, MComprehensive mineFor comprehensive mine batch weight, ρComprehensive mineFor comprehensive mine heap ratio
Weight, C are furnace charge compression ratio；
The compressed volume of manganese ore is calculated with manganese ore batch weight, manganese ore bulk density and furnace charge compression ratio, calculation formula is such as
Shown in formula 4,
VManganese ore=MManganese ore/ρManganese ore× (1-C) (4)
Wherein, VManganese oreFor the compressed volume of manganese ore, MManganese oreFor manganese ore batch weight, ρManganese oreFor manganese ore bulk density, C is furnace charge compression
Rate；
The compressed volume of flux is calculated with flux batch weight, flux bulk density and furnace charge compression ratio, calculation formula is such as
Shown in formula 5,
VFlux=MFlux/ρFlux× (1-C) (5)
Wherein, VFluxFor the compressed volume of flux, MFluxFor flux batch weight, ρFluxFor flux bulk density, C is furnace charge compression
Rate；
Therefore the compressed volume V of empty charge weightSky material=VCoke, the compressed volume V of regular burden(ing) batch weightRegular burden(ing)=VCoke+VComprehensive mine
+VManganese ore+VFlux；
C, with the linear relationship of damping down time when blast furnace short term damping-down and the total coke ratio of damping down material, the corresponding damping down period is calculated
The total coke ratio of damping down material, calculation formula as indicated with 6,
KAlways=a × t+b (6)
Wherein, KAlwaysFor the total coke ratio of damping down material, t is the damping down time, and a, b are with the confirmable definite value of blast furnace actual production；
D, sky charge number and regular burden(ing) lot number needed for calculating:
With the volume relationship formulation of shaft furnace charging volume and damping down material, specific equation is as shown in Equation 7,
VBlast furnace=x × VSky material+y×VRegular burden(ing) (7)
Wherein, x is required empty charge number, and y is required regular burden(ing) lot number；
With iron content magnitude relation formulation in the total coke ratio of damping down material and coke batch weight, regular burden(ing) batch weight, specific equation is such as
Shown in formula 8,
KAlways=(x × MCoke+y×MCoke)/(y×MIron) (8)
Wherein, MIronFor iron-containing quality in normal charge weight；
Sky charge number x and regular burden(ing) lot number y can be obtained by equation 7 and 8.
It is further limited as to above-mentioned technical proposal, comprehensive mine batch weight, manganese ore batch weight and flux batch weight meter in step b
Specific step is as follows for calculation:
B1, the iron-containing quality of institute, such as 9 institute of calculation formula in single batch of regular burden(ing) are calculated with coke batch weight and regular burden(ing) coke ratio
Show,
MIron=MCoke/ regular burden(ing) coke ratio (9)
Wherein, MIronTo contain weight of iron, M in normal charge weightCokeFor coke batch weight；
B2, comprehensive mine batch weight and manganese ore batch weight in regular burden(ing) are calculated using iron balance and manganese equilibrium equation to normal charge,
Specific equation as shown in formula 10,11,
(MComprehensive mine× synthesis mine ferrous grade+MManganese ore× manganese ore ferrous grade) × iron the rate of recovery/molten iron iron content percentage=
MIron (10)
The original percentage containing manganese of molten iron × MIron+ manganese ore percentage containing the manganese × manganese rate of recovery × MManganese ore=MIron× require molten iron
Percentage containing manganese (11)
B3, with contained CaO, SiO in coke batch weight, comprehensive mine batch weight and manganese ore batch weight2、MgO、Al2O3Quality obtain
The original dual alkalinity of clinker, original dual alkalinity formula is as shown in Equation 12,
Original dual alkalinity=MCaO/MSiO2 (12)
Wherein, MCaOFor the summation of contained CaO mass in coke batch weight, comprehensive mine batch weight and manganese ore batch weight, MSiO2For coke
Contained SiO in charcoal batch weight, comprehensive mine batch weight and manganese ore batch weight2The summation of quality；
Then blast-furnace slag dual alkalinity is set, and with clinker dual alkalinity, the M of settingCaOAnd MSiO2It calculates
To the SiO that need to be added again2Quality, specific formula is as shown in Equation 13,
Set dual alkalinity=MCaO/(MSiO2+ΔMSiO2) (13)
Wherein, Δ MSiO2For the SiO that need to be added again2Quality；
By Δ MSiO2And contained SiO in flux2Mass percent required flux quality can be obtained, as in regular burden(ing)
Flux batch weight.
It is further limited as to above-mentioned technical proposal, the comprehensive mine includes sinter and pellet, the sintering
The proportion of mine and pellet in comprehensive mine is determined by actual production.
It is further limited as to above-mentioned technical proposal, the flux is serpentine.
Using above-mentioned technology, the present invention has the advantages that
The calculation method of blast furnace short term damping-down material of the invention, the basic item of production according to the setting of the enterprise practical condition of production
Part can be determined net burnt amount and regular burden(ing) concrete composition by iron balance, manganese balance and clinker balance, then with short
The increased amount of the coke theoretical basis proportional with the damping down time is foundation in damping down material when phase damping down, can be to different blast furnace stayings
Blast furnace needed for time is expired furnace damping down material and is clearly determined, so that blast furnace after multiple wind is transferred to rapidly normally, it is multiple to avoid blast furnace
The high or low generation of furnace temperature after wind, thus reduce the consumption of fuel, so that the waste of a large amount of manpower and material resources is reduced, and
Slag fluidity has also obtained apparent improvement；In addition, the calculation method is simple, and it is convenient for computer programming and realizes automatically
Change and calculate, make that calculating speed is fast, computational accuracy is high, avoids error caused by people's direct intervention, processing and control, while also subtracting
The light workload of computing staff.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not having
All other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment
It is 380m that the present embodiment, which is related to a kind of design heat size,3Blast furnace short term damping-down material calculation method, specific steps are such as
Under:
A, shaft furnace charging volume is determined
Calculate 380m3Shaft furnace charging volume, calculation formula is as shown in Equation 1,
VBlast furnace=VBosh+VFurnace bosh+VShaft+VFurnace throat (1)
Wherein, VBlast furnaceFor shaft furnace charging volume, VBosh、VFurnace bosh、VShaftThe blast-furnace bosh being respectively calculated by blast furnace size
Volume, belly of blast furnace volume and blast-furnace shaft volume, VFurnace throatBlast furnace throat volume to calculate by blast furnace size subtracts furnace throat stockline
The volume that above section volume obtains；
With 380m3The size identified on BF Design drawing, can be calculated VBoshFor 84.1m3, VFurnace boshFor 36.48m3, VShaftFor
225.16m3, VFurnace throatFor 1.37m3, therefore
VBlast furnace=84.1m3+36.48m3+225.16m3+1.37m3=347.11m3
B, with actual production conditions, 380m is calculated3The weight of sky charge needed for Damping Down Charge of Blast is compressed with regular burden(ing) batch weight
Volume
Damping Down Charge of Blast hollow material is coke, and regular burden(ing) is the mixture of coke, comprehensive iron ore, manganese ore and flux, and empty
The coke batch weight of material is identical as coke batch weight contained in regular burden(ing).Wherein, batch weight refers to the quality for being packed into a batch of material in blast furnace.
According to actual production, coke batch weight is set as 3200kg, balances to obtain just using the iron balance and manganese of professional standard
Often comprehensive mine batch weight and manganese ore batch weight in material；And using the clinker dual alkalinity of single batch of regular burden(ing) as definite value, to flux in regular burden(ing)
Batch weight is determined；The specific of then comprehensive mine batch weight in single batch of regular burden(ing), manganese ore batch weight and flux batch weight calculates that steps are as follows:
B1, the regular burden(ing) coke ratio with coke batch weight and with actual production for foundation setting calculate institute's iron content in single batch of regular burden(ing)
Quality, calculation formula as figure 9,
MIron=MCoke/ regular burden(ing) coke ratio (9)
Wherein, MIronTo contain weight of iron, M in single batch of regular burden(ing)CokeFor coke batch weight, regular burden(ing) coke ratio (t/t) is 0.43；
Then MIron=3200kg/0.43=7442kg
B2, comprehensive mine batch weight and manganese ore batch weight in single batch of regular burden(ing), specific side are calculated using iron balance and manganese equilibrium equation
Formula as shown in formula 10,11,
(MComprehensive mine× synthesis mine ferrous grade+MManganese ore× manganese ore ferrous grade) × iron the rate of recovery/molten iron iron content percentage=
MIron (10)
The original percentage containing manganese of molten iron × MIron+ manganese ore percentage containing the manganese × manganese rate of recovery × MManganese ore=MIron× require molten iron
Percentage containing manganese (11)
Wherein, comprehensive mine ferrous grade, manganese ore ferrous grade, manganese ore percentage containing manganese as enterprise produce used in it is comprehensive
It closes mine and manganese ore determines, and comprehensive mine includes sinter and pellet, the proportion of sinter and pellet in comprehensive mine is by reality
Border production determines that the proportion of sinter and pellet is 0.82:0.18 in comprehensive mine in the present embodiment；And the rate of recovery, the iron of iron
Water iron content percentage, the original percentage containing manganese of molten iron, manganese the rate of recovery, to require molten iron percentage containing manganese then be with actual production
For the specific value according to setting, specific data are shown in Table 1.
Table 1:
| Comprehensive mine ferrous grade (%) | 55.83 |
| Manganese ore ferrous grade (%) | 7.06 |
| Manganese ore percentage containing manganese (%) | 39.0 |
| The rate of recovery (%) of iron | 99.6 |
| Molten iron iron content percentage (%) | 94.0 |
| The original percentage containing manganese of molten iron (%) | 0.15 |
| The rate of recovery (%) of manganese | 60.0 |
| It is required that molten iron percentage containing manganese (%) | 1.0 |
Note: comprehensive mine ferrous grade (%)=sinter ferrous grade (%) × 0.82+ pellet ferrous grade (%) ×
0.18, sinter ferrous grade (%) is 54.58%, and pellet ferrous grade (%) is 61.54%.
Therefore 1 numerical value of table is substituted into formula 10,11, is obtained
(MComprehensive mine× 55.83%+MManganese ore× 7.06%) × 99.6%/94.0%=7442kg
0.15% × 7442kg+39.0% × 60.0% × MManganese ore=7442kg × 1.0%
By solving linear equation in two unknowns, M is calculated to obtainComprehensive mineFor 12546kg, MManganese oreFor 270kg；MComprehensive mineActually take 12600kg；
And manganese ore is blast furnace auxiliary material, and main function is cleaning blast furnace crucibe, improve molten iron flow, and enterprise is that reduction production cost can
It does not take, therefore manganese ore is practical takes zero.
B3, flux batch weight in single batch of regular burden(ing) is determined
The coke according to used in enterprise can determine that the percentage composition of contained CaO in coke is 0.59%, contained SiO2's
Percentage composition is 6.08%.
According to sinter and pellet in comprehensive mine, it may be determined that the percentage composition of CaO contained by sinter is 11.21%, institute
Containing SiO2Percentage composition be 5.97%；The percentage composition of CaO contained by pelletizing money is 0.74%, contained SiO2Percentage composition be
7.76%；And the proportion of sinter and pellet is 0.82:0.18 in comprehensive mine, can must integrate the percentage of contained CaO in mine
Content is
11.21% × 0.82+0.74% × 0.18=9.33%
Contained SiO in comprehensive mine batch weight2Percentage composition be
5.97% × 0.82+7.76% × 0.18=6.29%
So the percentage composition of contained CaO is 9.33% in comprehensive mine, contained SiO2Percentage composition be 6.29%.And iron
(%) siliceous in water is 1.20%.
With contained CaO, SiO in coke batch weight, comprehensive mine batch weight and manganese ore batch weight2Quality and enter molten iron in
SiO2Quality obtain the original dual alkalinity of clinker.Original dual alkalinity formula is as shown in Equation 12,
Original dual alkalinity=MCaO/MSiO2 (12)
Wherein, MCaOFor the summation of contained CaO mass in coke batch weight, comprehensive mine batch weight and manganese ore batch weight, MSiO2For coke
Contained SiO in charcoal batch weight, comprehensive mine batch weight and manganese ore batch weight2The summation of quality subtracts the matter into silica in molten iron
Amount；
Then MCaO=3200kg × 0.59%+12600kg × 9.33%=1194kg
MSiO2=3200kg × 6.08%+12600kg × 6.29%-7442kg × 1.20%=899kg
So original dual alkalinity=1194kg/899kg=1.33
In order to improve the mobile performance of blast-furnace slag, portion of flux can be added suitably into regular burden(ing) to reduce State of Blast Furnace
The dual alkalinity of slag.
Therefore the dual alkalinity after set addition flux according to actual production is 1.2, and with the dual alkalinity of setting, MCaO
And MSiO2The SiO that need to be added again is calculated2Quality, specific formula is as shown in Equation 13,
Set dual alkalinity=MCaO/(MSiO2+ΔMSiO2) (13)
Wherein, Δ MSiO2For the SiO that need to be added again2Quality；
Then 1.2=1194kg/ (899+ Δ MSiO2)
Solve Δ MSiO2For 96kg, then also need to be added the SiO of 96kg into single batch of regular burden(ing)2Blast-furnace slag can just be made
Dual alkalinity is 1.2.
Serpentine is often used in blast furnace ironmaking as flux, serpentine is a kind of silicate rock rich in magnesium, this implementation
Serpentine used in example contains SiO2Percentage composition be 37.46%, the percentage composition containing CaO is 0.94%, therefore by Δ
MSiO2And contained SiO in flux2Mass percent required flux quality can be obtained be
96kg/37.46%=256kg
And at this point, also having filled into a certain amount of CaO into single batch of regular burden(ing), specific value is
256kg × 0.94%=2kg
So the final slag dual alkalinity filled into after 256kg serpentine into single batch of regular burden(ing) is
Final slag dual alkalinity=(1194+2) kg/ (899+96) kg=1.2
Therefore, the flux batch weight in single batch of regular burden(ing) is 256kg.
So single batch of regular burden(ing) concrete composition is as shown in the table:
| Comprehensive mine batch weight (kg) | 12600 |
| Coke batch weight (kg) | 3200 |
| Manganese ore batch weight (kg) | 0 |
| Flux batch weight (kg) | 256 |
Then, the compressed volume of coke is calculated with coke batch weight, coke bulk density and furnace charge compression ratio, calculated public
Formula is as shown in Equation 2,
VCoke=MCoke/ρCoke× (1-C) (2)
Wherein, VCokeFor the compressed volume of coke batch weight, MCokeFor coke batch weight, ρCokeCertainly for coke bulk density, i.e. coke
Averag density when so stacking, C are furnace charge compression ratio；ρCokeIt is with actual production for the specific value according to setting, ρ with KCoke
For 0.55t/m3, C 12%.
Specific calculating is as follows:
VCoke=3200kg/ (0.55t/m3× 1000) × (1-12%)=5.12m3
The compressed volume of comprehensive mine is calculated to integrate mine batch weight, comprehensive mine bulk density and furnace charge compression ratio, calculates
Formula is as shown in Equation 3,
VComprehensive mine=MComprehensive mine/ρComprehensive mine× (1-C) (3)
Wherein, VComprehensive mineFor the comprehensive compressed volume of mine batch weight, MComprehensive mineFor comprehensive mine batch weight, ρComprehensive mineFor comprehensive mine heap ratio
Weight, C are furnace charge compression ratio；
Because comprehensive mine is that sinter and pellet are mixed to get by the proportion of 0.82:0.12, therefore
VComprehensive mine=(0.82 × MComprehensive mine/ρSinter+0.12×MComprehensive mine/ρPellet) × (1-C)
Wherein, ρSinterFor sinter bulk density, ρPelletFor pellet bulk density；Sinter bulk density is sinter nature heap
Averag density when putting, pellet bulk density are averag density when pellet is stacked naturally；ρSinterWith ρPelletIt is with reality
It is produced as the specific value according to setting, ρSinterFor 1.75t/m3, ρPelletFor 2.15t/m3。
Specific calculating is as follows:
VComprehensive mine=[12600kg × 0.82/ (1.75t/m3×1000)+12600kg×0.18/(2.15t/m3×1000)]
× (1-12%)=6.12m3
The compressed volume of manganese ore is calculated with manganese ore batch weight, manganese ore bulk density and furnace charge compression ratio, calculation formula is such as
Shown in formula 4,
VManganese ore=MManganese ore/ρManganese ore× (1-C) (4)
Wherein, VManganese oreFor the compressed volume of manganese ore, MManganese oreFor manganese ore batch weight, ρManganese oreFor manganese ore bulk density, i.e. manganese ore nature heap
Averag density when putting, C are furnace charge compression ratio；
Because manganese ore value is zero, then VManganese ore=0
The compressed volume of flux is calculated with flux batch weight, flux bulk density and furnace charge compression ratio, calculation formula is such as
Shown in formula 5,
VFlux=MFlux/ρFlux× (1-C) (5)
Wherein, VFluxFor the compressed volume of flux, MFluxFor flux batch weight, ρFluxFor flux bulk density, i.e. flux nature heap
Averag density when putting, C are furnace charge compression ratio；ρFluxFor the specific value for taking actual production as foundation setting, ρFluxFor 1.60t/
m3。
Specific calculating is as follows:
VFlux=256kg/ (1.60t/m3× 1000) × (1-12%)=0.14m3
Therefore the compressed volume of empty charge weight is VSky material=VCoke=5.12m3, the compressed volume of regular burden(ing) batch weight is
VRegular burden(ing)=VCoke+VComprehensive mine+VManganese ore+VFlux=5.12m3+6.12m3+0m3+0.14m3, i.e. 11.38m3。
C, with the linear relationship of damping down time when blast furnace short term damping-down and the total coke ratio of damping down material, the corresponding damping down period is calculated
The total coke ratio of damping down material, calculation formula as indicated with 6,
KAlways=a × t+b (6)
Wherein, KAlwaysFor the total coke ratio of damping down material, t is the damping down time, and a, b are with the confirmable definite value of actual production；
380m in the present embodiment3Blast furnace, according to actual production can determine a be 7.8, b 568.6, therefore by a, b substitute into
Formula 6 can obtain
KAlways=7.8 × t+568.6 (6)
Blast furnace staying time 13h is taken in the present embodiment, and K is calculated to obtain according to formula 6AlwaysFor 670kg/t.
D, sky charge number and regular burden(ing) lot number needed for calculating:
With the volume relationship formulation of shaft furnace charging volume and damping down material, specific equation is as shown in Equation 7,
VBlast furnace=x × VSky material+y×VRegular burden(ing) (7)
Wherein, x is required empty charge number, and y is required regular burden(ing) lot number；
With iron content magnitude relation formulation in the total coke ratio of damping down material and coke batch weight, regular burden(ing) batch weight, specific equation is such as
Shown in formula 8,
KAlways=(x × MCoke+y×MCoke)/(y×MIron) (8)
Wherein, MIronFor iron-containing quality in normal charge weight；
By V obtained in step a, b, cBlast furnace、VSky material、VRegular burden(ing)、MCoke、MIronAnd the total coke ratio of damping down material substitutes into equation 7,8
5.12x+11.38y=347.11
(3200x+3200y)/(7442y)=670/1000
Linear equation in two unknowns is solved, x=13.6, y=24.3 are obtained.
Therefore, 380m in the present embodiment3The damping down material needed when blast furnace staying 13h includes that 13.5 batches of empty material and 24 batches are normal
Material.
In addition, also having added 30-40kg/t iron fluorite in damping down material to improve the mobility of blast-furnace slag.
It, can be small at 4 with 24 batches of regular burden(ing)s using resulting 13.5 batches empty material are calculated in the present embodiment after blast furnace staying 13h
When produce blast furnace opening to reaching, and the fast quick-recovery of the working of a furnace is normal after can ensure that multiple wind, and can reach expected Control for Kiln Temperature requirement,
And slag fluidity is good.
Heat size is 380m3Blast furnace plan every year regular inspection 4 times, average each damping down 12 hours is average relatively traditional every time
Blast furnace opening recovery time to needed for reaching production shortens 8 hours, then annual to shorten 32 hours, then corresponding 933 ton (32 of yield of offer
×0.5×1400/24).It is calculated with 2100 yuan/ton of molten iron price, the economic value of generation is 1,960,000 yuan.Therefore, the blast furnace is short
The calculation method of phase damping down material has not only saved a large amount of fuel consumption, reduces the waste of a large amount of manpower and material resources, also significantly
Improve Business Economic Benefit.In addition, accordingly reducing the heat of high silicon iron out since furnace condition recovery is fast, improving and produce
Iron quality.
In conclusion the calculation method of blast furnace short term damping-down material of the invention, is balanced by iron balance, manganese balance, clinker
And the increased amount of coke scheduling theory directly proportional to the damping down time, can be to difference according to being foundation in short term damping-down time damping down material
Blast furnace needed for the blast furnace staying time is expired furnace damping down material and explicitly determine, determining damping down material can make blast furnace fast after multiple wind
Speed, which is transferred to, normally not only shortens blast furnace from blow-on to up to the time produced, but also also reduces the consumption of fuel, not only reduces
The waste of a large amount of manpower and material resources, also substantially increases the economic benefit of enterprise instead；In addition the calculation method is simple, and convenient for into
Row computer programming realizes that automation calculates, so that it is fast to make to calculate not only speed, but also precision is high, avoids people's direct intervention, place
Error caused by reason, control etc. is answered wind to blast furnace opening and is impacted, while also mitigating the workload of computing staff.
Claims (3)
1. a kind of calculation method of blast furnace short term damping-down material, which comprises the following steps:
A, shaft furnace charging volume is determined:
Selected blast furnace calculates shaft furnace charging volume, shown in calculation formula such as formula (1),
V blast furnace=V bosh+V furnace bosh+V shaft+V furnace throat (1)
Wherein, V blast furnace is shaft furnace charging volume, and V bosh, V furnace bosh, V shaft are respectively the blast furnace being calculated by blast furnace size
Bosh volume, belly of blast furnace volume and blast-furnace shaft volume, V furnace throat are to subtract furnace by the blast furnace throat volume that blast furnace size calculates
The volume that larynx stockline above section volume obtains；
B, with actual production conditions, the weight of sky charge needed for calculating Damping Down Charge of Blast and the compressed volume of regular burden(ing) batch weight:
Sky material is coke, and regular burden(ing) is coke, comprehensive mine, manganese ore, the mixture with flux, and the coke batch weight of empty material and normal
Contained coke batch weight is identical in material；
It is set according to actual production STRENGTH ON COKE batch weight, balances to obtain using the iron balance and manganese of professional standard comprehensive in regular burden(ing)
Close mine batch weight and manganese ore batch weight；And using the clinker dual alkalinity of single batch of regular burden(ing) as definite value, flux batch weight in regular burden(ing) is carried out
It determines；Specific step is as follows for comprehensive mine batch weight, manganese ore batch weight and the calculating of flux batch weight:
B1, the iron-containing quality of institute in single batch of regular burden(ing) being calculated with coke batch weight and regular burden(ing) coke ratio, calculation formula such as (9) is shown,
M iron=M coke/regular burden(ing) coke ratio (9)
Wherein, M iron is to contain weight of iron in normal charge weight, and M coke is coke batch weight；
B2, comprehensive mine batch weight and manganese ore batch weight in regular burden(ing) are calculated using iron balance and manganese equilibrium equation to normal charge, specifically
Shown in equation such as formula (10), (11),
The rate of recovery/molten iron iron content the percentage of (the comprehensive mine × synthesis mine ferrous grade+M manganese ore × manganese ore ferrous grade of M) × iron
=M iron (10)
The original percentage containing manganese of molten iron × M iron+manganese ore percentage containing manganese × manganese rate of recovery × M manganese ore=M iron × requires molten iron
Percentage containing manganese (11)
B3, furnace is obtained with the quality of contained CaO, SiO2, MgO, Al2O3 in coke batch weight, comprehensive mine batch weight and manganese ore batch weight
The original dual alkalinity of slag, shown in original dual alkalinity formula such as formula (12),
Original dual alkalinity=MCaO/MSiO2 (12)
Wherein, MCaO is coke batch weight, the summation for integrating contained CaO mass in mine batch weight and manganese ore batch weight, and MSiO2 is coke
The summation of contained SiO2 mass in batch weight, comprehensive mine batch weight and manganese ore batch weight；
Then blast-furnace slag dual alkalinity is set, and is calculated with clinker dual alkalinity, MCaO and the MSiO2 of setting
The SiO2 mass that need to be added again, shown in specific formula such as formula (13),
It sets dual alkalinity=MCaO/ (MSiO2+ Δ M SiO2) (13)
Wherein, Δ MSiO2 is the SiO2 mass that need to be added again；
Required flux quality can be obtained by the mass percent of contained SiO2 in Δ MSiO2 and flux, melted as in regular burden(ing)
Agent batch weight；
The compressed volume of coke, calculation formula such as formula (2) is calculated with coke batch weight, coke bulk density and furnace charge compression ratio
It is shown,
V coke=M coke/ρ coke × (1-C) (2)
Wherein, V coke is the compressed volume of coke batch weight, and M coke is coke batch weight, and ρ coke is coke bulk density, and C is furnace
Expect compression ratio；
The compressed volume of comprehensive mine, calculation formula is calculated to integrate mine batch weight, comprehensive mine bulk density and furnace charge compression ratio
As shown in formula (3),
V integrates comprehensive mine × (1-C) (3) the comprehensive mine/ρ of mine=M
Wherein, the comprehensive mine of V is the comprehensive compressed volume of mine batch weight, and the comprehensive mine of M is comprehensive mine batch weight, and the comprehensive mine of ρ is comprehensive mine
Bulk density, C are furnace charge compression ratio；
The compressed volume of manganese ore, calculation formula such as formula (4) is calculated with manganese ore batch weight, manganese ore bulk density and furnace charge compression ratio
It is shown,
V manganese ore=M manganese ore/ρ manganese ore × (1-C) (4)
Wherein, V manganese ore is the compressed volume of manganese ore, and M manganese ore is manganese ore batch weight, and ρ manganese ore is manganese ore bulk density, and C is furnace charge pressure
Shrinkage；
The compressed volume of flux, calculation formula such as formula (5) is calculated with flux batch weight, flux bulk density and furnace charge compression ratio
It is shown,
V flux=M flux/ρ flux × (1-C) (5)
Wherein, V flux is the compressed volume of flux, and M flux is flux batch weight, and ρ flux is flux bulk density, and C is furnace charge pressure
Shrinkage；
Therefore the compressed volume of empty charge weight is V coke, and the compressed volume of regular burden(ing) batch weight is V regular burden(ing)=V coke+V
Comprehensive mine+V manganese ore+V flux；
C, with the linear relationship of damping down time when blast furnace short term damping-down and the total coke ratio of damping down material, stopping for corresponding damping down period is calculated
The total coke ratio of fertilizer, calculation formula such as (6) is shown,
K is total=a × t+b (6)
Wherein, K is always the total coke ratio of damping down material, and t is the damping down time, and a, b are with the confirmable definite value of blast furnace actual production；
D, sky charge number and regular burden(ing) lot number needed for calculating:
With the volume relationship formulation of shaft furnace charging volume and damping down material, shown in specific equation such as formula (7),
V blast furnace=x × V sky material+y × V regular burden(ing) (7)
Wherein, V sky material is V coke, and x is required empty charge number, and y is required regular burden(ing) lot number；
With iron content magnitude relation formulation in the total coke ratio of damping down material and coke batch weight, regular burden(ing) batch weight, specific equation such as formula (8)
It is shown,
K is total=(x × M coke+y × M coke)/(y × M iron) (8)
Wherein, M iron is iron-containing quality in normal charge weight；
Sky charge number x and regular burden(ing) lot number y can be obtained by equation (7) and (8).
2. the calculation method of blast furnace short term damping-down material according to claim 1, it is characterised in that: the comprehensive mine includes burning
The proportion of knot mine and pellet, the sinter and pellet in comprehensive mine is determined by actual production.
3. the calculation method of blast furnace short term damping-down material according to claim 1, it is characterised in that: the flux is snake
Stone.
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| CN112626295B (en) * | 2019-10-08 | 2022-08-19 | 中冶赛迪信息技术(重庆)有限公司 | Damping-down control method, device, equipment and medium for blast furnace |
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