CN102586519A - Calculus prediction method for adjusting operation of blast furnace - Google Patents
Calculus prediction method for adjusting operation of blast furnace Download PDFInfo
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Abstract
The invention provides a calculus prediction method for adjusting the operation of a blast furnace, belonging to the technical field of blast furnace smelting. Based on the Rist operating line theory, in combination with characteristics of the production blast furnace and in full consideration of the influence on blast furnace smelting from hydrogen, the method is aimed at reflecting the actual operation situation of the blast furnace and bringing convenience to blast furnace operators to carry out calculus for blast furnace parameter adjustment on the basis of the current smelting conditions, in order to provide guidance for further improvement of the operation.
Description
Technical field
The invention belongs to technical field of blast furnace process; Be particularly related to a kind of calculation Forecasting Methodology that is used to adjust blast furnace operating; A kind of based on Rist pilot wire theory, be used to instruct the calculation Forecasting Methodology of blast furnace important operation parameter adjustment, support multiparameter arbitrary combination adjustment calculation.Be applicable to the calculation prediction and calculation after the blast furnace operating parameter adjustment.
Background technology
In the blast furnace ironmaking process; Be accompanied by the countercurrent movement of furnace charge and coal gas; Multiple complicated chemical reaction and physical change have been accomplished in the stove; The metallargist wants through mathematical method blast furnace ironmaking process to be described always for many years, and French Li Site (Rist) professor gives prominence to its main system Fe-O-C system the physical-chemical reaction of numerous complicated in blast furnace when the control of later stage sixties research blast furnace process; With simply and than accurate means giving expression to the blast furnace energy expenditure and influence the many effect of factors of coke ratio, promptly the Rist pilot wire is theoretical.
It is theoretical to the present invention is based on the Rist pilot wire; In conjunction with the characteristics and the condition of producing blast furnace; A kind of calculation Forecasting Methodology that is used to adjust blast furnace operating has been proposed; The person that can help the blast furnace operating is based on current smelting condition and blast furnace operating situation, and each important parameter of adjustment blast furnace carries out pilot wire calculation prediction and calculation, for further improving operation provider tropism's guidance.
Summary of the invention
The object of the present invention is to provide a kind of calculation Forecasting Methodology that is used to adjust blast furnace operating; This method is the basis with Rist pilot wire theory; In conjunction with the characteristics of producing blast furnace, and take into full account the influence of hydrogen, make every effort to truly reflect blast furnace actually operating situation blast-furnace smelting; The person that makes things convenient for the blast furnace operating carries out blast furnace parameter adjustment calculation based on current smelting condition, for further improving operation provider tropism's guidance.
It is theoretical to the present invention is based on the Rist pilot wire; A kind of calculation Forecasting Methodology that is used to adjust blast furnace operating is provided; Can be respectively under the constant and non-constant pattern of Fe-O-C, to the prediction and calculation that performs calculations of the blast furnace situation after the blast furnace operating parameter adjustment, comprise following process step:
(1) according to the preceding 8 hours average smelting condition of blast furnace, calculate actually operating line, ideal operation line, all crude fuels and molten iron inspection analysis data and pilot wire calculation result are saved to DB;
(2) the crude fuel condition is imported as known quantity with the relevant inspection of smelting output object analysis data; Adjust high furnace parameters (air quantity, wind-warm syndrome, injecting coal quantity, Rich Oxygen Amount, blast humidity, coke are criticized heavily) arbitrarily alone or in combination, calculate adjusted blast furnace situation through the Rist pilot wire under the constant and non-constant pattern of Fe-O-C;
(3) the blast furnace each item index that obtains according to operating parameters adjustment back calculation judges whether the adjustment scheme is reasonable, and wherein the shaft working efficiency is a more direct judgement criteria.
A kind of calculation Forecasting Methodology that is used to adjust blast furnace operating that the present invention proposes; Concrete implementation method under the Fe-O-C constant-mode is following: under the amount constant pattern that guarantees stove Fe, O, C element, perform calculations; The i.e. smelting result of calculation different operating mode under the condition of the constant and identical output object of amount (gas composition, slag iron) of Fe, O, C element, concrete grammar is following:
(1) adjustment injecting coal quantity
Coal powder injection mainly is for the instead of part coke, reaches the purpose that reduces coke ratio.To increase injecting coal quantity is example; The stove C that goes into that should calculate the adjustment back increases measures (kg/thm); The C that this part increases needs the C from coke to cut; Promptly calculate the coke consumption (kg/thm) that needs minimizing, carry out the RIST pilot wire after the adjustment of injecting coal quantity and amount of coke like this and calculate, can guarantee into the total C amount of stove constant by the C amount that increases.
(2) adjustment Rich Oxygen Amount
To improve Rich Oxygen Amount is example, and Rich Oxygen Amount increases, and the O amount in the then air blast (mixing wind) increases, constant in order to guarantee into stove O amount, and it is constant to guarantee stove O amount then need to reduce air quantity (mixing wind), carries out the RIST pilot wire by adjusted Rich Oxygen Amount and air quantity then and calculates.
Because of the Rich Oxygen Amount adjustment, need adjustment Wind Coverage Calculation method following: suppose that the preceding air quantity of adjustment is V, oxygen level is (O in the wind
2)
b, adjustment back air quantity is V ', oxygen level is (O in the wind
2)
b', then the constant calculation formula of oxygen amount is:
V×(O
2)
b＝V′×(O
2)
b′
The oxygen level calculation formula is following in the wind:
In the formula, w---1m
3The oxygen rich air scale of construction that adds in the air blast, i.e. oxygen enrichment percentage (m
3/ m
3Air blast)
α---oxygen purity in the oxygen rich gas (volumn concentration is generally greater than 95%) is chosen according to blast furnace is actual.
According to the situation of producing blast furnace, oxygen rich gas is usually with m
3/ h is a unit, and the blast furnace air quantity detects data often with m
3/ min is a unit, then:
The w=oxygen rich air scale of construction/60/ blast furnace air quantity
After the adjustment of the oxygen rich air scale of construction, cause the variation of oxygen enrichment percentage w, can calculate the O that adjustment front and back air blast is brought into by oxygen level calculation formula in the wind
2The amount changing value can calculate the amount that air quantity need be adjusted by the constant calculation formula of oxygen amount again.
(3) adjustment air quantity
Similar with Rich Oxygen Amount adjustment mode, after the air quantity adjustment, tackle Rich Oxygen Amount mutually and adjust automatically, constant to guarantee stove O amount.
(4) the adjustment coke is criticized heavily
Similar with injecting coal quantity adjustment mode, after coke is criticized readjust, tackle injecting coal quantity mutually and adjust automatically, constant to guarantee the total C amount of stove.
Can directly adjust when (5) adjusting wind-warm syndrome, blast humidity, need not carry out constant process.
A kind of calculation Forecasting Methodology that is used to adjust blast furnace operating that the present invention proposes; Concrete implementation method under the non-constant pattern of Fe-O-C is following: under the non-constant pattern of the amount of Fe, O, C element, perform calculations; Can adjust arbitrarily the amount that Fe, O, C element are gone into stove, need not carry out constant adjustment and handle, but must under the condition of identical output object (gas composition, slag iron), calculate the smelting result of different operating mode; Main ordering parameter comprises that injecting coal quantity, Rich Oxygen Amount, air quantity, wind-warm syndrome, blast humidity, coke criticize heavily; But each operating parameters is independent control all, also can make up adjustment, need not carry out constant calculating.
Beneficial effect of the present invention:
The present invention is a kind of calculation Forecasting Methodology that is used to adjust blast furnace operating; Theoretical based on the Rist pilot wire; Can be under the constant and non-constant pattern of Fe-O-C; To the prediction and calculation that performs calculations of the blast furnace situation after the blast furnace operating parameter adjustment, help the blast furnace operating person to judge in advance whether the adjustment direction of blast furnace operating parameter is reasonable, for the decision-making of follow-up actual adjustment action provides theoretical foundation.
Description of drawings
Fig. 1 is for producing the Rist actually operating line and the ideal operation line chart of blast furnace.
Fig. 2 is fork curve and pilot wire system of coordinates corresponding relation figure.
Fig. 3 is a blast furnace operating parameter adjustment calculation process flow diagram flow chart of the present invention.
Embodiment
Carry out detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
At first the actual Rist pilot wire computation process of producing blast furnace is described in detail; Actually operating line as shown in Figure 1; Modern blast furnace is produced the tuyere injection coal dust instead of part coke that adopt more and is carried out blast-furnace smelting; A large amount of hydrogen of bringing into the influence of blast furnace can not be ignored, concrete method of calculation are following:
(1) the A point calculates
Need the data of preparation before calculating: ton iron crude fuel consumption, crude fuel chemical examination composition, stock gas composition.Wherein, a ton iron crude fuel consumption calculates through actual material loading situation, and method is following: the consumption (t/ criticizes) of ore, fuel, flux in every batch of material can be obtained by one-level material loading information, theoretical batch iron amount (ton iron/batch) can be obtained by charge calculation, then:
Ton iron crude fuel consumption=1000/ theoretical batch of iron amount (Kg/tHM) of every batch of material Central Plains firing rate *
Show X like Fig. 1
ACalculate by adjusted gas composition, consider versatility, need to consider flux CaCO
3, establish CaCO
3Rate of decomposition in the high-temperature zone is α, establishes ton iron and consumes CaCO
3Amount be Φ, CaCO
3Middle CO
2Content is (CO
2)
Φ, establishing a ton iron furnace top coal quantity is V
g, adjusted ton iron coal gas amount is V
g'.Method is following:
Molten damage reaction according to the high-temperature zone can know that the amount of the CO that the high-temperature zone produces does
V
CO′＝Φ*(CO
2)
Φ*α*22.4*2/44(m
3/tHM)
The CO that middle warm area decomposites
2Amount do
V
CO2′＝Φ*(CO
2)
Φ*(1-α)*22.4/44(m
3/tHM)
Then, adjusted ton iron coal gas amount does
V
g′＝V
g-0.5*V
CO′-V
CO2′(m
3/tHM)
Then adjusted gas composition percentage composition is:
(CO)
g′＝[V
g*(CO)
g-0.5*V
CO′]/V
g′
(CO
2)
g′＝[V
g*(CO
2)
g-V
CO2′]/V
g′
(N
2)
g′＝V
g*(N
2)
g/V
g′
(CH
4)
g′＝V
g*(CH
4)
g/V
g′
(H
2)
g′＝V
g*(H
2)
g/V
g′
Then A point X-coordinate does
X
A＝1+η
CO′＝1+(CO
2)
g′/[(CO
2)
g′+(CO)
g′]
Show that like Fig. 1 A point ordinate zou does
Y
A＝y
o-y
H2
Y wherein
oFor going into the oxidisability of stove iron ore, method of calculation are following:
y
o=∑ (O content among the ton iron ore i consumption * ore i)/∑ (Fe content among the ton iron ore i consumption * ore i)
y
H2For by H
2The O amount (1mol H2 captures 1mol O) that indirect reduction is captured from ferriferous oxide, method of calculation are following:
y
H2=[ton iron is gone into the total H of stove
2Amount * η
H2/ 22.4]/[reductive Fe/56 in the ton iron] (Kmol/Kmol)
In the formula, η
H2=0.88* η
CO'+0.1 (experimental formula)
Perhaps, y
H2=[ton iron is gone into the total H of stove
2Amount-V
g' * (H
2)
g']/[reductive Fe/56 in the ton iron]
Wherein, ton iron is gone into the total H of stove
2The H that H, the coal dust that contains in the H that amount comprises that air blast is wet to be contained in dividing, the coke coal dust contained in wet the branch.
(2) the E point calculates
Show Y like Fig. 1
E=-(y
f+ y
b), X
E=0.
Wherein, y
f=(y
Si+ y
Mn+ y
P+ y
V+ y
Ti)+y
S+ y
Φ(general formula)
The O amount (mol) that the direct reduction of alloying element (Si, Mn, P, V, Ti) oxide compound is captured can be calculated by the percentage composition of element in the molten iron, and formula is following:
y
Si＝4*w[Si]/w[Fe.r]
y
Mn＝1.02*w[Mn]/w[Fe.r]
y
P＝4.5*w[P]/w[Fe.r]
y
V＝2.74*w[V]/w[Fe.r]
y
Ti＝2.33*w[Ti]/w[Fe.r]
CaO can be calculated by the percentage composition of S in the slag by the O amount (mol) that C seizes in the sweetening process slag, and method is following: calculate ton scum amount U (Kg/tHM), and can be by CaO, MgO, SiO in the slag
2, Al
2O
3Four component total amounts are calculated, also can calculate by the CaO single component, then:
y
S＝1.75*U*w(S)/(1000*w[Fe.r])
If blast furnace does not add scrap iron, w [Fe.r]=w [Fe] then.
If add scrap iron, then
W [Fe.r]=[Fe content in the scrap iron consumption * scrap iron of 1000*w [Fe]-ton iron]/1000
CaCO
3Decomposite 1mol CO in the high-temperature zone
2With 1mol C the damage reaction takes place to dissolve and generate 2mol CO, wherein the CO of 1mol generates through the O that C captures among the CO2, therefore:
y
Φ=(0.5*V
CO'/22.4)/[reductive Fe/56 in the ton iron] (Kmol (O)/Kmol (Fe))
y
bBy ton iron loss air quantity V
bWith oxygen volumn concentration (O in the air blast
2)
bCalculate, method is following: at first, and ton iron loss air quantity V
bBy adjusted ton iron coal gas amount V
g' (m
3/ tHM) calculate through the N balance, establish nitrogen volumn concentration (N in the air blast
2)
b, then formula is:
V
b=[V
g' * (N
2)
g'-(N
2)
Formerly expect]/(N
2)
b(m
3/ tHM)
Then
y
b=[V
b* (O
2)
b/ 22.4] * 2/ [reductive Fe/56 in the ton iron] (Kmol (O)/Kmol (Fe))
So the coordinate that E is ordered is:
X
E＝0
Y
E＝-(y
f+y
b)
The coordinate of (3) being ordered by A, E is the equation that point method capable of using solves actually operating line AE.
Secondly the desirable Rist pilot wire computation process of producing blast furnace is described in detail, ideal operation line as shown in Figure 1, its concrete method of calculation are following:
(1) the P point calculates
Calculation result by the front can know, the U point coordinate be (0 ,-y
f), i.e. Y
U=-y
f
By the own knowledge of the calculation result AE line segment equation of front, ask the P point need find the solution the equation of UV line segment, promptly find the solution the V point coordinate and get final product.
The V point coordinate can be calculated by the elevated temperature heat balance, and the high-temperature zone critical temperature is decided to be 950 ℃, has according to thermal equilibrium:
Ton iron net heat income Q
EffectivelyIron directly reduces heat dissipation Q in the=ton iron
Fe.dOther heat dissipations of+ton iron Q
Other(unit: KJ/tHM)
Wherein,
Q
EffectivelyCarbon burning generates hot Q before the=ton iron winds mouth
1The net heat Q that the air blast of+ton iron is brought into
2
Q
Fe.d=y
d* q
d* [ton iron in reductive Fe/56] (KJ/tHM)
Wherein,
q
d=4.18*649.1*56=151941.3 (KJ/Kmol (C)) (constant)
Q
1＝4.18*2340*C
b (KJ/tHM)
Wherein, C
bCan be by ton iron loss air quantity V
bWith oxygen volumn concentration (O in the air blast
2)
bCalculate (1mol O
2Consume 2mol C), formula is:
C
b＝[V
b*(O
2)
b/22.4]*2*12 (Kg/tHM)
In the formula,
t
b---hot blast temperature, ℃
C
Pb (Tb)---the T of hot blast temperature is brought the average hot melt of the air blast that calculates, KJ/m into
3.K
C
Pb (273+950)---950 ℃ T is brought the average hot melt of the air blast that calculates, KJ/m into
3.K
Because Q
Effectively/ [reductive Fe/56 in the ton iron]=y
b* q
b(KJ/Kmol (Fe)) so
q
b=Q
Effectively/ { [reductive Fe/56 in the ton iron] * y
b}
=(Q
1+ Q
2)/{ [reductive Fe/56 in the ton iron] * y
b(KJ/Kmol (C))
By Q
Fe.d, Q
1, Q
2Calculation result, can obtain other heat dissipations of ton iron Q
Other(KJ/tHM) be:
Q
Other=Q
Effectively-Q
Fe.d
=y
b* q
b* [ton iron in reductive Fe/56]-y
d* q
d* [reductive Fe/56 in the ton iron]
The formula both sides divided by [reductive Fe/56 in the ton iron], become together:
Q
Other/ [reductive Fe/56 in the ton iron]=y
b* q
b-y
d* q
d(KJ/Kmol (Fe))
After the conversion:
By similar triangles △ VPB and △ UPE, can know:
Then can obtain:
X
P＝q
d/(q
b+q
d)
Show that like Fig. 1 trilateral △ UPP ' is similar with △ UVV ':
Known Y
U=-y
f, Y
V=-Q
Other/ { [reductive Fe/56 in the ton iron] * q
d}
Then can obtain: Y
P=Y
U+ X
P* (Y
V-Y
U)
(2) the W point calculates
The position that W is ordered is confirmed by the chemical equilibrium of floating scholar's body indirect reduction reaction, is shown like Fig. 2.
The ordinate zou that W is ordered:
Y
W=1 (because floating scholar's body is designated as FeO usually)
X-coordinate X
WMethod of calculation following:
Consider H
2The ability of reducing iron oxides is better than CO in the time of＞810 ℃, so the X-coordinate position that W is ordered will squint to the right, and the amplitude of skew is gone into stove H with ton iron
2Amount accounts for high-temperature zone ton iron and produces reducing gas total amount (CO, H
2) ratio relevant, proportion is big more, skew is many more to the right, concrete calculation formula is following:
In the formula, y
d+ y
f+ y
b)---the amount of whole CO that the high-temperature zone produces, unit K mol (CO)/Kmol (Fe), (because the whole O atoms that shift have all generated CO gas);
The amount of the Restore All gas that
---high-temperature zone produces, unit is Kmol/Kmol (Fe);
(CO
2)
The balance gas phase---CO+FeO=Fe+CO
2CO in the balance gas phase when being reflected at the high-temperature zone critical temperature
2Percentage composition (that is: CO
2/ (CO+CO
2));
(H
2O)
The balance gas phase---H
2+ FeO=Fe+H
2H in balance gas phase when O is reflected at the high-temperature zone critical temperature
2The percentage composition of O (that is: H
2O/ (H
2+ H
2O));
The method of calculation of
are following in the following formula:
The coordinate of (3) being ordered by P, W is the equation that point method capable of using solves ideal operation line A ' E '.
A kind of calculation Forecasting Methodology that is used to adjust blast furnace operating that the present invention proposes; Concrete implementation method under the Fe-O-C constant-mode is following: under the amount constant pattern that guarantees stove Fe, O, C element, perform calculations; The i.e. smelting result of calculation different operating mode under the condition of the constant and identical output object of amount (gas composition, slag iron) of Fe, O, C element, concrete grammar is following:
(1) adjustment injecting coal quantity
Coal powder injection mainly is for the instead of part coke, reaches the purpose that reduces coke ratio.To increase injecting coal quantity is example; The stove C that goes into that should calculate the adjustment back increases measures (kg/thm); The C that this part increases needs the C from coke to cut; Promptly calculate the coke consumption (kg/thm) that needs minimizing, carry out the RIST pilot wire after the adjustment of injecting coal quantity and amount of coke like this and calculate, can guarantee into the total C amount of stove constant by the C amount that increases.
(2) adjustment Rich Oxygen Amount
To improve Rich Oxygen Amount is example, and Rich Oxygen Amount increases, and the O amount in the then air blast (mixing wind) increases, constant in order to guarantee into stove O amount, and it is constant to guarantee stove O amount then need to reduce air quantity (mixing wind), carries out the RIST pilot wire by adjusted Rich Oxygen Amount and air quantity then and calculates.
Because of the Rich Oxygen Amount adjustment, need adjustment Wind Coverage Calculation method following: suppose that the preceding air quantity of adjustment is V, oxygen level is (O in the wind
2)
b, adjustment back air quantity is V ', oxygen level is (O in the wind
2)
b', then the constant calculation formula of oxygen amount is:
V×(O
2)
b＝V′×(O
2)
b′
The oxygen level calculation formula is following in the wind:
In the formula, w---1m
3The oxygen rich air scale of construction that adds in the air blast, i.e. oxygen enrichment percentage (m
3/ m
3Air blast)
α---oxygen purity in the oxygen rich gas (volumn concentration) is chosen according to blast furnace is actual.
In like manner,
According to the situation of producing blast furnace, oxygen rich gas is usually with m
3/ h is a unit, and the blast furnace air quantity detects data often with m
3/ min is a unit, then:
The w=oxygen rich air scale of construction/60/ blast furnace air quantity
After the adjustment of the oxygen rich air scale of construction, cause the variation of oxygen enrichment percentage w, can calculate the O that adjustment front and back air blast is brought into by oxygen level calculation formula in the wind
2The amount changing value can calculate the amount that air quantity need be adjusted by the constant calculation formula of oxygen amount again.
(3) adjustment air quantity
Similar with Rich Oxygen Amount adjustment mode, after the air quantity adjustment, tackle Rich Oxygen Amount mutually and adjust automatically, constant to guarantee stove O amount.
(4) the adjustment coke is criticized heavily
Similar with injecting coal quantity adjustment mode, after coke is criticized readjust, tackle injecting coal quantity mutually and adjust automatically, constant to guarantee the total C amount of stove.
Can directly adjust when (5) adjusting wind-warm syndrome, blast humidity, need not carry out constant process.
A kind of calculation Forecasting Methodology that is used to adjust blast furnace operating that the present invention proposes; Concrete implementation method under the non-constant pattern of Fe-O-C is following: under the non-constant pattern of the amount of Fe, O, C element, perform calculations; Can adjust arbitrarily the amount that Fe, O, C element are gone into stove, need not carry out constant adjustment and handle, but must under the condition of identical output object (gas composition, slag iron), calculate the smelting result of different operating mode; Main ordering parameter comprises that injecting coal quantity, Rich Oxygen Amount, air quantity, wind-warm syndrome, blast humidity, coke criticize heavily; But each operating parameters is independent control all, also can make up adjustment, need not carry out constant calculating.
Claims (3)
1. calculation Forecasting Methodology that is used to adjust blast furnace operating is characterized in that: under the constant and non-constant pattern of Fe-O-C, to the prediction and calculation that performs calculations of the blast furnace situation after the blast furnace operating parameter adjustment, comprise following process step:
(1) according to the preceding 8 hours average smelting condition of blast furnace, calculate actually operating line, ideal operation line, all crude fuels and molten iron inspection analysis data and pilot wire calculation result are saved to DB;
(2) the crude fuel condition is imported as known quantity with the relevant inspection of smelting output object analysis data; Adjust high furnace parameters arbitrarily alone or in combination: air quantity, wind-warm syndrome, injecting coal quantity, Rich Oxygen Amount, blast humidity, coke are criticized heavily, calculate adjusted blast furnace situation through the Rist pilot wire under the constant and non-constant pattern of Fe-O-C;
(3) the blast furnace each item index that obtains according to operating parameters adjustment back calculation judges whether the adjustment scheme is reasonable, and wherein the shaft working efficiency is a judgement criteria.
2. method according to claim 1 is characterized in that: described to calculate the concrete calculating of adjusted blast furnace situation through the Rist pilot wire under the constant and non-constant pattern of Fe-O-C following:
(1) adjustment injecting coal quantity
Coal powder injection mainly is for the instead of part coke, reaches the purpose that reduces coke ratio.To increase injecting coal quantity is example; The stove C that goes into that should calculate the adjustment back increases measures kg/thm; The C that this part increases needs the C from coke to cut; Promptly calculate the coke consumption kg/thm that needs minimizing by the C amount that increases; Carry out the RIST operating line after the adjustment of injecting coal quantity and amount of coke like this and calculate, can guarantee into the total C amount of stove constant;
(2) adjustment Rich Oxygen Amount
To improve Rich Oxygen Amount is example, and Rich Oxygen Amount increases, and then the O amount in the drum mixing wind increases, constant in order to guarantee into stove O amount, and it is constant to guarantee that stove O measures then need to reduce mixed air volume, carries out the RIST pilot wire by adjusted Rich Oxygen Amount and air quantity then and calculates;
Because of the Rich Oxygen Amount adjustment, need the adjustment Wind Coverage Calculation following: suppose that the preceding air quantity of adjustment is V, oxygen level is (O in the wind
2)
b, adjustment back air quantity is V ', oxygen level is (O in the wind
2)
b', then the constant calculation formula of oxygen amount is:
V×(O
2)
b＝V′×(O
2)
b′
The oxygen level calculation formula is following in the wind:
In the formula, w---1m
3The oxygen rich air scale of construction that adds in the air blast, i.e. oxygen enrichment percentage (m
3/ m
3Air blast)
α---oxygen purity in the oxygen rich gas, volumn concentration is greater than 95%;
According to the situation of producing blast furnace, oxygen rich gas is usually with m
3/ h is a unit, and the blast furnace air quantity detects data often with m
3/ min is a unit, then:
The w=oxygen rich air scale of construction/60/ blast furnace air quantity
After the adjustment of the oxygen rich air scale of construction, cause the variation of oxygen enrichment percentage w, can calculate the O that adjustment front and back air blast is brought into by oxygen level calculation formula in the wind
2The amount changing value can calculate the amount that air quantity need be adjusted by the constant calculation formula of oxygen amount again;
(3) adjustment air quantity
Similar with Rich Oxygen Amount adjustment mode, after the air quantity adjustment, tackle Rich Oxygen Amount mutually and adjust automatically, constant to guarantee stove O amount;
(4) the adjustment coke is criticized heavily
Similar with injecting coal quantity adjustment mode, after coke is criticized readjust, tackle injecting coal quantity mutually and adjust automatically, constant to guarantee the total C amount of stove;
Can directly adjust when (5) adjusting wind-warm syndrome, blast humidity, need not carry out constant process.
3. method according to claim 1 and 2; It is characterized in that: under the non-constant pattern of amount of Fe, O, C element, perform calculations; The amount of promptly Fe, O, C element being gone into stove is adjusted arbitrarily, need not carry out constant adjustment and handle, but must under the condition of identical output object, calculate the smelting result of different operating mode; Ordering parameter comprises that injecting coal quantity, Rich Oxygen Amount, air quantity, wind-warm syndrome, blast humidity, coke criticize heavily; The equal independent control of each operating parameters, or make up adjustment, need not carry out constant calculating.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104298214A (en) * | 2014-11-03 | 2015-01-21 | 天津理工大学 | Comprehensive optimization and control method for blast furnace molten iron productive process |
| CN104988259A (en) * | 2015-07-25 | 2015-10-21 | 东北大学 | Method for drawing Rist operating line for blast furnace |
| CN109811097A (en) * | 2019-03-26 | 2019-05-28 | 中冶华天工程技术有限公司 | A kind of predictor method of BF Design production capacity |
| CN113667781A (en) * | 2021-07-29 | 2021-11-19 | 北京首钢股份有限公司 | Method for reducing fuel ratio of blast furnace |
| CN117418054A (en) * | 2023-10-23 | 2024-01-19 | 广东中南钢铁股份有限公司 | Method and device for determining blast furnace tuyere injection coal amount, storage medium and program product |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104298214A (en) * | 2014-11-03 | 2015-01-21 | 天津理工大学 | Comprehensive optimization and control method for blast furnace molten iron productive process |
| CN104988259A (en) * | 2015-07-25 | 2015-10-21 | 东北大学 | Method for drawing Rist operating line for blast furnace |
| CN109811097A (en) * | 2019-03-26 | 2019-05-28 | 中冶华天工程技术有限公司 | A kind of predictor method of BF Design production capacity |
| CN113667781A (en) * | 2021-07-29 | 2021-11-19 | 北京首钢股份有限公司 | Method for reducing fuel ratio of blast furnace |
| CN117418054A (en) * | 2023-10-23 | 2024-01-19 | 广东中南钢铁股份有限公司 | Method and device for determining blast furnace tuyere injection coal amount, storage medium and program product |
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