CN107299169A - The computational methods of blast furnace short term damping-down material - Google Patents
The computational methods of blast furnace short term damping-down material Download PDFInfo
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Abstract
The present invention relates to a kind of computational methods of blast furnace short term damping-down material, belong to technical field of blast furnace ironmaking, the described method comprises the following steps：Determine shaft furnace charging volume；With actual production conditions, empty charge weight needed for calculating Damping Down Charge of Blast and the volume after the compression of regular burden(ing) batch weight；With the total coke ratio of damping down material of the linear calculating of short term damping-down time and the total coke ratio of damping down material corresponding damping down period；Damping down material concrete composition is determined with shaft furnace charging volume balance and coke ratio balance.The Damping Down Charge of Blast that the computational methods of the blast furnace short term damping-down material obtained using the present invention are obtained, blast furnace opening can not only substantially shortened to up to the production time, greatly reduce the waste of manpower and materials, and calculate simply, conveniently, and computer programming realization automation calculating can be carried out, make calculating more accurately, more rapidly.
Description
Technical field
The present invention relates to technical field of blast furnace ironmaking, more particularly to a kind of computational methods of blast furnace short term damping-down material.
Background technology
Blast furnace staying refers to blast furnace in iron-making production because scheduled overhaul, process accident or other reasonses etc. are to blast furnace
Process that is out-of-blast and interrupting production.Blast furnace staying point 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 damping down of the damping down time more than 16 hours is then long term blowing-down.Typically have in short term
The damping down of plan can add the furnace charge for being different from normally producing before damping down into blast furnace, with during playing supplement blast furnace staying
Thermal loss, making blast furnace, the working of a furnace can quick-recovery soon after multiple wind.
Under present circumstances, workman is in accordance with the working experience of oneself and a certain amount of net Jiao is added into blast furnace and normal
Material, with the thermal loss of blast furnace during supplementing damping down.But, the amount of the net burnt and regular burden(ing) of addition is often held bad, causes
Furnace temperature is high or low after furnace compound wind, slow down the recovery of conditions of blast furnace, thus can be to causing certain loss in production.
The content of the invention
In order to solve the above problems, the invention provides a kind of computational methods of blast furnace short term damping-down material, the blast furnace is short-term
The computational methods 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
The working of a furnace to normal, and can reach that expected Control for Kiln Temperature is required by quick-recovery soon after multiple wind.
The technical scheme of use of the present invention is：The computational methods of blast furnace short term damping-down material, comprise the following steps：
A, determine shaft furnace charging volume：
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 respectively obtained by blast furnace Size calculation
Volume, belly of blast furnace volume and blast-furnace shaft volume, VFurnace throatTo subtract furnace throat stockline by the blast furnace throat volume of blast furnace Size calculation
The volume that above section volume is obtained；
B, with actual production conditions, empty charge weight needed for calculating Damping Down Charge of Blast compressed with regular burden(ing) batch weight after volume：
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 with contained coke batch weight in regular burden(ing)；
Set according to actual production STRENGTH ON COKE batch weight, the iron balance and manganese balance using professional standard obtain regular burden(ing)
Middle comprehensive ore deposit 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；
Calculated with coke batch weight, coke bulk density and furnace charge compression ratio and obtain the volume after coke compression, calculation formula is such as
Shown in formula 2,
VCoke=MCoke/ρCoke× (1-C) (2)
Wherein, VCokeVolume after being compressed for coke batch weight, MCokeFor coke batch weight, ρCokeFor coke bulk density, C is furnace charge
Compression ratio；
Obtain integrating the volume after ore deposit compression to integrate ore deposit batch weight, comprehensive ore deposit bulk density and the calculating of furnace charge compression ratio, calculate
Formula is as shown in Equation 3,
VComprehensive ore deposit=MComprehensive ore deposit/ρComprehensive ore deposit× (1-C) (3)
Wherein, VComprehensive ore depositFor the volume after comprehensive ore deposit batch weight compression, MComprehensive ore depositFor comprehensive ore deposit batch weight, ρComprehensive ore depositFor comprehensive ore deposit heap ratio
Weight, C is furnace charge compression ratio；
Calculated with manganese ore batch weight, manganese ore bulk density and furnace charge compression ratio and obtain the volume after manganese ore compression, calculation formula is such as
Shown in formula 4,
VManganese ore=MManganese ore/ρManganese ore× (1-C) (4)
Wherein, VManganese oreVolume after being compressed for manganese ore, MManganese oreFor manganese ore batch weight, ρManganese oreFor manganese ore bulk density, C compresses for furnace charge
Rate；
Calculated with flux batch weight, flux bulk density and furnace charge compression ratio and obtain the volume after flux compression, calculation formula is such as
Shown in formula 5,
VFlux=MFlux/ρFlux× (1-C) (5)
Wherein, VFluxVolume after being compressed for flux, MFluxFor flux batch weight, ρFluxFor flux bulk density, C compresses for furnace charge
Rate；
Therefore the volume V after empty charge weight contractsSky material=VCoke, the volume V after the compression of regular burden(ing) batch weightRegular burden(ing)=VCoke+VComprehensive ore deposit
+VManganese ore+VFlux；
C, with damping down time during blast furnace short term damping-down and the linear relationship of the total coke ratio of damping down material, calculate the corresponding damping down period
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；
Empty charge number and regular burden(ing) lot number needed for d, 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 empty charge number, y regular burden(ing) lot numbers for needed for for needed for；
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 the quality of institute's iron content in regular burden(ing) batch weight；
Sky charge number x and regular burden(ing) lot number y can obtain by equation 7 and 8.
As the further restriction to above-mentioned technical proposal, ore deposit batch weight, manganese ore batch weight and flux batch weight meter are integrated in step b
That calculates comprises the following steps that：
B1, the quality for calculating with coke batch weight and regular burden(ing) coke ratio institute's iron content in single batch of regular burden(ing), the institute of calculation formula such as 9
Show,
MIron=MCoke/ regular burden(ing) coke ratio (9)
Wherein, MIronTo contain weight of iron, M in regular burden(ing) batch weightCokeFor coke batch weight；
B2, using iron balance and manganese equilibrium equation comprehensive ore deposit batch weight and manganese ore batch weight in regular burden(ing) are calculated to normal charge,
Specific equation as shown in formula 10,11,
(MComprehensive ore deposit× integrate ore deposit 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 × MIronThe rate of recovery × M of+manganese ore percentage containing manganese × manganeseManganese ore=MIron× require molten iron
Percentage containing manganese (11)
B3, with contained CaO, SiO in coke batch weight, comprehensive ore deposit 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 ore deposit batch weight and manganese ore batch weight, MSiO2For Jiao
Contained SiO in charcoal batch weight, comprehensive ore deposit 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 MSiO2Calculate
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 can obtain required flux quality, as in regular burden(ing)
Flux batch weight.
As the further restriction to above-mentioned technical proposal, the comprehensive ore deposit includes sintering deposit and pellet, the sintering
Proportioning of the ore deposit with pellet in comprehensive ore deposit is determined by actual production.
As the further restriction to above-mentioned technical proposal, the flux is serpentine.
Using above-mentioned technology, the advantage of the invention is that：
The computational methods of the blast furnace short term damping-down material of the present invention, the basic bar of production according to the setting of the enterprise practical condition of production
Part can be determined by iron balance, manganese balance and clinker balance to net burnt amount and regular burden(ing) concrete composition, then with short
The increased amount of the coke theoretical foundation proportional with the damping down time is foundation in damping down material during phase damping down, can be to different blast furnace stayings
The full stove damping down material of blast furnace needed for time is clearly determined, blast furnace after multiple wind is transferred to rapidly normally, it is to avoid blast furnace is multiple
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 materials is reduced, and
Slag fluidity has also obtained obvious improvement；In addition, the computational methods are simple, and it is automatic to be convenient for computer programming realization
Change and calculate, make that calculating speed is fast, computational accuracy is high, it is to avoid the error that people's direct intervention, processing and control are caused, while also subtracting
The light workload of computing staff.
Embodiment
The present invention is described in further detail with reference to embodiment, it is clear that described embodiment is only this
Invent a part of embodiment, rather than whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art are not having
There is all other embodiment made and obtained under the premise of creative work, belong to the scope of protection of the 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 computational methods, specific steps are such as
Under：
A, determine shaft furnace charging volume
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 respectively obtained by blast furnace Size calculation
Volume, belly of blast furnace volume and blast-furnace shaft volume, VFurnace throatTo subtract furnace throat stockline by the blast furnace throat volume of blast furnace Size calculation
The volume that above section volume is obtained；
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, calculate 380m3After empty charge weight compresses with regular burden(ing) batch weight needed for Damping Down Charge of Blast
Volume
Damping Down Charge of Blast hollow material is coke, and regular burden(ing) is coke, the mixture for integrating iron ore, manganese ore and flux, and sky
The coke batch weight of material is identical with contained coke batch weight in regular burden(ing).Wherein, batch weight refers to the quality for loading a batch of material in blast furnace.
According to actual production, coke batch weight is set as 3200kg, and the iron balance and manganese balance using professional standard are obtained just
Often ore deposit batch weight and manganese ore batch weight are integrated 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；Then the specific calculation procedure of comprehensive ore deposit batch weight, manganese ore batch weight and flux batch weight is as follows in single batch of regular burden(ing)：
B1, the regular burden(ing) coke ratio set using coke batch weight and using actual production as foundation 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 ore deposit batch weight and manganese ore batch weight, specific side are calculated in single batch of regular burden(ing) using iron balance and manganese equilibrium equation
Formula as shown in formula 10,11,
(MComprehensive ore deposit× integrate ore deposit 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 × MIronThe rate of recovery × M of+manganese ore percentage containing manganese × manganeseManganese ore=MIron× require molten iron
Percentage containing manganese (11)
Wherein, comprehensive ore deposit ferrous grade, manganese ore ferrous grade, manganese ore percentage containing manganese by enterprise produce used in it is comprehensive
Close ore deposit and manganese ore is determined, and comprehensive ore deposit includes sintering deposit and pellet, the proportioning of sintering deposit and pellet in comprehensive ore deposit is by reality
Border production determines that the proportioning of sintering deposit and pellet is 0.82 in comprehensive ore deposit in the present embodiment:0.18；And the rate of recovery, the iron of iron
Water iron content percentage, the original percentage containing manganese of molten iron, the rate of recovery of manganese, require that molten iron percentage containing manganese is then with actual production
For the concrete numerical value according to setting, specific data are shown in Table 1.
Table 1：
| Comprehensive ore deposit 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 ore deposit ferrous grade (%)=sintering deposit ferrous grade (%) × 0.82+ pellets ferrous grade (%) ×
0.18, sintering deposit ferrous grade (%) is 54.58%, and pellet ferrous grade (%) is 61.54%.
Therefore the numerical value of table 1 is substituted into formula 10,11, obtained
(MComprehensive ore deposit× 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 calculatedComprehensive ore depositFor 12546kg, MManganese oreFor 270kg；MComprehensive ore depositActually take 12600kg；
And manganese ore is blast furnace auxiliary material, main function is cleaning blast furnace crucibe, improves molten iron flow, and enterprise can for reduction production cost
Do not take, therefore manganese ore is actual takes zero.
B3, determine flux batch weight in single batch of regular burden(ing)
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 sintering deposit and pellet in comprehensive ore deposit, it may be determined that the percentage composition of CaO contained by sintering deposit is 11.21%, institute
Containing SiO2Percentage composition be 5.97%；CaO percentage composition contained by pelletizing money is 0.74%, contained SiO2Percentage composition be
7.76%；And the proportioning of sintering deposit and pellet is 0.82 in comprehensive ore deposit:0.18, it can must integrate the percentage of contained CaO in ore deposit
Content is
11.21% × 0.82+0.74% × 0.18=9.33%
Contained SiO in comprehensive ore deposit batch weight2Percentage composition be
5.97% × 0.82+7.76% × 0.18=6.29%
So contained CaO percentage composition is 9.33%, contained SiO in comprehensive ore deposit2Percentage composition be 6.29%.And iron
(%) siliceous in water is 1.20%.
With contained CaO, SiO in coke batch weight, comprehensive ore deposit 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 ore deposit batch weight and manganese ore batch weight, MSiO2For Jiao
Contained SiO in charcoal batch weight, comprehensive ore deposit 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 added after flux is set as 1.2 according to actual production, and with the dual alkalinity of setting, MCaO
And MSiO2Calculate the SiO for obtaining adding 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；
Then 1.2=1194kg/ (899+ Δs MSiO2)
Solve Δ MSiO2For 96kg, then also need to add 96kg SiO into single batch of regular burden(ing)2Blast-furnace slag can just be made
Dual alkalinity is 1.2.
Serpentine often is used as flux in blast furnace ironmaking, and 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 can obtain required flux quality and be
96kg/37.46%=256kg
And now, a certain amount of CaO also having been filled into single batch of regular burden(ing), concrete numerical value is
256kg × 0.94%=2kg
So the final slag dual alkalinity filled into single batch of regular burden(ing) after 256kg serpentines 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 ore deposit batch weight (kg) | 12600 |
| Coke batch weight (kg) | 3200 |
| Manganese ore batch weight (kg) | 0 |
| Flux batch weight (kg) | 256 |
Then, the volume obtained after coke compression is calculated with coke batch weight, coke bulk density and furnace charge compression ratio, calculates public
Formula is as shown in Equation 2,
VCoke=MCoke/ρCoke× (1-C) (2)
Wherein, VCokeVolume after being compressed for coke batch weight, MCokeFor coke batch weight, ρCokeFor coke bulk density, i.e. coke certainly
Averag density when so stacking, C is furnace charge compression ratio；ρCokeIt is using actual production as the concrete numerical value according to setting, ρ with KCoke
For 0.55t/m3, C is 12%.
Specifically it is calculated as follows：
VCoke=3200kg/ (0.55t/m3× 1000) × (1-12%)=5.12m3
Obtain integrating the volume after ore deposit compression to integrate ore deposit batch weight, comprehensive ore deposit bulk density and the calculating of furnace charge compression ratio, calculate
Formula is as shown in Equation 3,
VComprehensive ore deposit=MComprehensive ore deposit/ρComprehensive ore deposit× (1-C) (3)
Wherein, VComprehensive ore depositFor the volume after comprehensive ore deposit batch weight compression, MComprehensive ore depositFor comprehensive ore deposit batch weight, ρComprehensive ore depositFor comprehensive ore deposit heap ratio
Weight, C is furnace charge compression ratio；
Because comprehensive ore deposit be sintering deposit with pellet by 0.82:What 0.12 proportioning was mixed to get, therefore
VComprehensive ore deposit=(0.82 × MComprehensive ore deposit/ρSintering deposit+0.12×MComprehensive ore deposit/ρPellet) × (1-C)
Wherein, ρSintering depositFor sintering deposit bulk density, ρPelletFor pellet bulk density；Sintering deposit bulk density is the natural heap of sintering deposit
Averag density when putting, pellet bulk density is averag density when pellet is stacked naturally；ρSintering depositWith ρPelletIt is with reality
It is produced as the concrete numerical value according to setting, ρSintering depositFor 1.75t/m3, ρPelletFor 2.15t/m3。
Specifically it is calculated as follows：
VComprehensive ore deposit=[12600kg × 0.82/ (1.75t/m3×1000)+12600kg×0.18/(2.15t/m3×1000)]
× (1-12%)=6.12m3
Calculated with manganese ore batch weight, manganese ore bulk density and furnace charge compression ratio and obtain the volume after manganese ore compression, calculation formula is such as
Shown in formula 4,
VManganese ore=MManganese ore/ρManganese ore× (1-C) (4)
Wherein, VManganese oreVolume after being compressed for manganese ore, MManganese oreFor manganese ore batch weight, ρManganese oreFor the natural heap of manganese ore bulk density, i.e. manganese ore
Averag density when putting, C is furnace charge compression ratio；
Because manganese ore value is zero, then VManganese ore=0
Calculated with flux batch weight, flux bulk density and furnace charge compression ratio and obtain the volume after flux compression, calculation formula is such as
Shown in formula 5,
VFlux=MFlux/ρFlux× (1-C) (5)
Wherein, VFluxVolume after being compressed for flux, MFluxFor flux batch weight, ρFluxFor the natural heap of flux bulk density, i.e. flux
Averag density when putting, C is furnace charge compression ratio；ρFluxFor using actual production as the concrete numerical value according to setting, ρFluxFor 1.60t/
m3。
Specifically it is calculated as follows：
VFlux=256kg/ (1.60t/m3× 1000) × (1-12%)=0.14m3
Therefore the volume after empty charge weight contracting is VSky material=VCoke=5.12m3, regular burden(ing) batch weight compression after volume be
VRegular burden(ing)=VCoke+VComprehensive ore deposit+VManganese ore+VFlux=5.12m3+6.12m3+0m3+0.14m3, i.e. 11.38m3。
C, with damping down time during blast furnace short term damping-down and the linear relationship of the total coke ratio of damping down material, calculate the corresponding damping down period
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 that a for 7.8, b be 568.6, therefore by a, b substitute into
Formula 6 can be obtained
KAlways=7.8 × t+568.6 (6)
Blast furnace staying time 13h is taken in the present embodiment, K is calculated according to formula 6AlwaysFor 670kg/t.
Empty charge number and regular burden(ing) lot number needed for d, 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 empty charge number, y regular burden(ing) lot numbers for needed for for needed for；
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 the quality of institute's iron content in regular burden(ing) batch weight；
The V that will be obtained in step a, b, cBlast furnace、VSky material、VRegular burden(ing)、MCoke、MIronAnd the total coke ratio of damping down material is substituted 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 is obtained.
Therefore, 380m in the present embodiment3The damping down material needed during blast furnace staying 13h includes 13.5 batches of empty material and 24 batches normal
Material.
In addition, also having added 30-40kg/t iron fluorites in the mobility in order to improve blast-furnace slag, damping down material.
, can be small at 4 using the 13.5 batches of empty material and 24 batches of regular burden(ing)s obtained by calculating in the present embodiment after blast furnace staying 13h
When make blast furnace opening to up to production, and can ensure that after multiple wind that the fast quick-recovery of the working of a furnace is normal, and can reach expected Control for Kiln Temperature requirement,
And slag fluidity is good.
Heat size is 380m3Blast furnace plan regular inspection every year 4 times, average each damping down 12 hours is average relatively conventional every time
Blast furnace opening is shortened 8 hours to up to recovery time needed for production, then annual to shorten 32 hours, then corresponds to and provide yield 933 ton (32
×0.5×1400/24).With the 2100 yuan/ton of calculating of molten iron price, the economic value of generation is 1,960,000 yuan.Therefore, the blast furnace is short
The computational methods of phase damping down material have not only saved substantial amounts of fuel consumption, reduce the waste of substantial amounts of manpower and materials, also significantly
Improve Business Economic Benefit.Further, since furnace condition recovery is fast, the heat of high silicon iron is accordingly reduced out, improves and produces
Iron quality.
In summary, the computational methods of blast furnace short term damping-down material of the invention, are balanced, clinker is balanced by iron balance, manganese
, can be to difference and the increased amount of coke is directly proportional scheduling theory to the damping down time according to being foundation in short term damping-down time damping down material
The full stove damping down material of blast furnace needed for the blast furnace staying time clearly determined, it is determined that damping down material blast furnace can be made fast after multiple wind
Speed is transferred to normally, not only shortens blast furnace from blow-on to the time up to production, and also reduces the consumption of fuel, is not only reduced
The waste of a large amount of manpower and materials, also substantially increases the economic benefit of enterprise on the contrary；The other computational methods are simple, and be easy into
Row computer programming realizes that automation is calculated, so that not only speed is fast for calculating, and precision is high, it is to avoid people's direct intervention, place
The error that reason, control etc. are caused is impacted to the multiple wind of blast furnace opening, while also mitigating the workload of computing staff.
Claims (4)
1. a kind of computational methods of blast furnace short term damping-down material, it is characterised in that comprise the following steps：
A, determine shaft furnace charging volume：
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 volume that is respectively obtained by blast furnace Size calculation,
Belly of blast furnace volume and blast-furnace shaft volume, VFurnace throatTo be subtracted more than furnace throat stockline by the blast furnace throat volume of blast furnace Size calculation
The volume that partial volume is obtained；
B, with actual production conditions, empty charge weight needed for calculating Damping Down Charge of Blast compressed with regular burden(ing) batch weight after volume：
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 with just
Often contained coke batch weight is identical in material；
Set according to actual production STRENGTH ON COKE batch weight, the iron balance and manganese balance using professional standard obtain comprehensive in regular burden(ing)
Close ore deposit 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 is determined that；
Calculated with coke batch weight, coke bulk density and furnace charge compression ratio and obtain the volume after coke compression, the calculation formula such as institute of formula 2
Show,
VCoke=MCoke/ρCoke× (1-C) (2)
Wherein, VCokeVolume after being compressed for coke batch weight, MCokeFor coke batch weight, ρCokeFor coke bulk density, C compresses for furnace charge
Rate；
Obtain integrating the volume after ore deposit compression, calculation formula to integrate ore deposit batch weight, comprehensive ore deposit bulk density and the calculating of furnace charge compression ratio
As shown in Equation 3,
VComprehensive ore deposit=MComprehensive ore deposit/ρComprehensive ore deposit× (1-C) (3)
Wherein, VComprehensive ore depositFor the volume after comprehensive ore deposit batch weight compression, MComprehensive ore depositFor comprehensive ore deposit batch weight, ρComprehensive ore depositFor comprehensive ore deposit bulk density, C is
Furnace charge compression ratio；
Calculated with manganese ore batch weight, manganese ore bulk density and furnace charge compression ratio and obtain the volume after manganese ore compression, the calculation formula such as institute of formula 4
Show,
VManganese ore=MManganese ore/ρManganese ore× (1-C) (4)
Wherein, VManganese oreVolume after being compressed for manganese ore, MManganese oreFor manganese ore batch weight, ρManganese oreFor manganese ore bulk density, C is furnace charge compression ratio；
Calculated with flux batch weight, flux bulk density and furnace charge compression ratio and obtain the volume after flux compression, the calculation formula such as institute of formula 5
Show,
VFlux=MFlux/ρFlux× (1-C) (5)
Wherein, VFluxVolume after being compressed for flux, MFluxFor flux batch weight, ρFluxFor flux bulk density, C is furnace charge compression ratio；
Therefore the volume V after empty charge weight contractsSky material=VCoke, the volume V after the compression of regular burden(ing) batch weightRegular burden(ing)=VCoke+VComprehensive ore deposit+VManganese ore
+VFlux；
C, with damping down time during blast furnace short term damping-down and the linear relationship of the total coke ratio of damping down material, calculate stopping for corresponding damping down period
The total coke ratio of fertilizer, 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；
Empty charge number and regular burden(ing) lot number needed for d, 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 empty charge number, y regular burden(ing) lot numbers for needed for for needed for；
With iron content magnitude relation formulation, the specific equation such as institute of formula 8 in the total coke ratio of damping down material and coke batch weight, regular burden(ing) batch weight
Show,
KAlways=(x × MCoke+y×MCoke)/(y×MIron) (8)
Wherein, MIronFor the quality of institute's iron content in regular burden(ing) batch weight；
Sky charge number x and regular burden(ing) lot number y can obtain by equation 7 and 8.
2. the computational methods of blast furnace short term damping-down material according to claim 1, it is characterised in that comprehensive ore deposit batch in step b
What weight, manganese ore batch weight and flux batch weight were calculated comprises the following steps that：
B1, the quality for calculating with coke batch weight and regular burden(ing) coke ratio institute's iron content in single batch of regular burden(ing), calculation formula as figure 9,
MIron=MCoke/ regular burden(ing) coke ratio (9)
Wherein, MIronTo contain weight of iron, M in regular burden(ing) batch weightCokeFor coke batch weight；
B2, using iron balance and manganese equilibrium equation comprehensive ore deposit batch weight and manganese ore batch weight in regular burden(ing) are calculated to normal charge, specifically
Equation as shown in formula 10,11,
(MComprehensive ore deposit× integrate ore deposit 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 × MIronThe rate of recovery × M of+manganese ore percentage containing manganese × manganeseManganese ore=MIron× require that molten iron contains manganese
Percentage (11)
B3, with contained CaO, SiO in coke batch weight, comprehensive ore deposit batch weight and manganese ore batch weight2、MgO、Al2O3Quality obtain clinker
Original dual alkalinity, 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 ore deposit batch weight and manganese ore batch weight, MSiO2For coke batch
Contained SiO in weight, comprehensive ore deposit 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 MSiO2Calculating is needed
The SiO 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 can obtain required flux quality, as flux in regular burden(ing)
Batch weight.
3. the computational methods of blast furnace short term damping-down material according to claim 2, it is characterised in that：The comprehensive ore deposit includes burning
Ore deposit and pellet are tied, proportioning of the sintering deposit with pellet in comprehensive ore deposit is determined by actual production.
4. the computational methods 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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| CN111914203B (en) * | 2020-04-30 | 2023-06-09 | 武钢集团昆明钢铁股份有限公司 | Calculation method of first tapping time and blast furnace opening method |
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