CN104573316B - A kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing - Google Patents
A kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing Download PDFInfo
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- CN104573316B CN104573316B CN201410717304.XA CN201410717304A CN104573316B CN 104573316 B CN104573316 B CN 104573316B CN 201410717304 A CN201410717304 A CN 201410717304A CN 104573316 B CN104573316 B CN 104573316B
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Abstract
The present invention be a kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing, the present invention has taken into full account influence of the metallurgical performance of comprehensive furnace charge to BF Technology in Bao Steel economic indicator, avoiding the very poor furnace charge of metallurgical performance causes smelting condition to deteriorate, in some instances it may even be possible to the possibility for causing blast furnace to stop production；The present invention is carried out with ore deposit than optimization from many aspects, it meets many requirements met required for right combination burden structure, in the case where production loss is not caused, the rational synthesis burden structure of shorter timi requirement and the optimal furnace charge mixing ratio for obtaining being suitable in rational synthesis burden structure this blast furnace of operator are used.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, specifically a kind of reasonable blast furnace furnace charge with ore deposit than it is preferred
Method.
Background technology
Think after comparing systematic research to the blast furnace burden structure of Some Domestic steel plant at present, rationally
Comprehensive furnace charge structures shape in resources supplIes, the technical merit of ore processing and status of equipment and the price of agglomeration finished product ore deposit
And its metallurgical performance；Therefore, to find rational synthesis burden structure is a system engineering for complexity, to be found rational comprehensive
Close and be suitable for the optimum fiting ratio of operator this blast furnace in burden structure and be more difficult to the technical problem for solving.
Due to " being based on blast furnace stove of the high basicity sinter with addition of acid burden material (acidic pellet ore, natural lump ore etc.)
Material matches somebody with somebody ore deposit pattern " preferable pig iron smelting effect is obtained in that, obtain preferable BF Technology in Bao Steel economic indicator, therefore people
Formd in long-term blast fumance a kind of fixation with ore deposit than pattern, such as sintering deposit 60% -70%, acid pellet
Ore deposit 10% -20%, rawore 10%--20% so that as long as blast furnace operating person believes firmly the operating personnel by there is practical production experience,
With reference to the condition of production of this blast furnace of early stage, this fix it is one or several with ore deposit ratio, input life with being drafted in the range of ore deposit ratio
In product, if the BF Technology in Bao Steel economic indicator for obtaining has reached be expected or more preferable than expection afterwards, continue to use, it is no
Then be finely adjusted again, so go round and begin again, it is possible to complete with ore deposit than optimization comparison procedure.
More than this rational comprehensive furnace charge with ore deposit than comparative approach due to being in rational comprehensive burden structure (Beijing
Agglomerates of sintered pellets research department of University of Science and Technology compares systematic research to the blast furnace burden structure of Some Domestic steel plant
Be identified later) in the range of optimize, and taken into full account the resources supplIes of this blast furnace of this factory, the technology of ore processing
Level and status of equipment, therefore, to a certain extent with certain correctness；But, it is one high by industrial production first
Stove as testing equipment it is the most original with ore deposit than optimization comparison procedure, have the risk of infringement blast-furnace equipment；Second, it does not have
There are the price and its metallurgical performance in view of agglomeration finished product ore deposit, especially metallurgical performance therein, think and be obtained in that very well
Pig iron smelting effect with ore deposit pattern with carrying out Blending optimization comparing in the range of ore deposit ratio, it is possible to ensure the blast furnace life drafted
Produce with ore deposit than obtaining preferable BF Technology in Bao Steel economic indicator, ignore the shadow of the metallurgical performance to blast fumance of comprehensive furnace charge
Ring, fact proved, even be obtained in that good pig iron smelting effect with ore deposit pattern with being refined in the range of ore deposit ratio
Iron production also occurs the phenomenon that smelting condition deteriorates, and the very poor furnace charge of metallurgical performance possibly even causes blast furnace to stop production；3rd,
Efficiency calculation realized compared with desired value with the BF Technology in Bao Steel economic indicator for obtaining afterwards, that is, to obtain afterwards
BF Technology in Bao Steel economic indicator as efficiency calculation basic data, this must allow a blast fumance with ore deposit than implement after,
Be possible to realize in the case of drawing every technical-economic index, on the one hand do so can cause the cycle of efficiency calculation very
It is long, with ore deposit than bad it is also possible to production loss can be caused, on the other hand, due to the BF Technology in Bao Steel warp that influence draws afterwards
Ji index factor is a lot, the technical-economic index to drawing is contributed afterwards in, it is believed that with ore deposit than being main, but not
Can say it is whole, so computational efficiency can not accurately illustrate well it is the result with ore deposit than optimizing.
As can be seen that the above method be do not find reasonable blast furnace furnace charge with ore deposit than optimization method in the case of
Caving-in bash, in the prior art no one kind can overcome problems present in the above method and relatively simple feasible
Method.
The content of the invention
The technical problems to be solved by the invention are, in order to overcome problems present in the above method propose it is a kind of compared with
Be the method for simple possible, i.e., a kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing, do not causing the feelings of production loss
Under condition, using the rational synthesis burden structure of shorter timi requirement and obtain being suitable in rational synthesis burden structure
The optimal furnace charge mixing ratio of operator this blast furnace.
The present invention solve above technical problem technical scheme be：
A kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing, comprise the following steps：
(i) ore matching efficiency is selected preferably with ore deposit than to ensure that blast furnace furnace charge has good metallurgical performance, specifically
For：
The low-temperature reduction disintegration of 1. suitable mixing blast furnace burden, i.e., will ensure following formula：
The value requirement for being calculated ensures upper blast furnace stability, in formula, R：The low-temperature reduction disintegration of mixture charge
RDI%；Ri：The low-temperature reduction disintegration RDI% of certain single Charging stock；Ni：Single Charging stock accounts for the fraction of mixture charge；n：Holding furnace
The species number of contained single Charging stock in material；
The high-temperature reductibility of 2. suitable mixing blast furnace burden, i.e., will ensure following formula:
The value requirement for being calculated is not because influence the fuel ratio and yield of blast furnace, in formula, I the reason for high-temperature reductibility：
The reproducibility RI% of mixture charge；Ii：The reproducibility RI% of certain single Charging stock；Ni：Single Charging stock accounts for the fraction of mixture charge；n：
The species number of contained single Charging stock in mixture charge；
3. obtain it is each mixing blast furnace burden with ore deposit than ore matching efficiency and be compared, specially：
I mixing blast furnace burden with ore deposit than the computing formula of ore matching efficiency be defined as following formula：
η=S/s (3)
In formula, η-for certain blast furnace burden with ore deposit than ore matching efficiency；S-for certain blast furnace burden with ore deposit than mixing
The melt-dropping property total characteristic value of furnace charge；S-for certain blast furnace burden with ore deposit than mixture charge used in sintering deposit it is molten
Drop performance total characteristic value；
II to meet above-mentioned steps 1. and 2. respectively with ore deposit than ore matching efficiency be compared：Matched somebody with somebody according to mixing blast furnace burden
Ore deposit than ore matching efficiency computing formula calculate it is each mixing blast furnace burden with ore deposit than ore matching efficiency, i.e., using following formula：
η n=Sn/sn n=1,2,3 ... ..., n (4)
Obtain η 1, η 2, η 3 ... ..., η n, in formula, η n：Certain blast furnace burden with ore deposit than ore matching efficiency；Sn：For certain is high
Stove furnace charge with ore deposit than mixture charge melt-dropping property total characteristic value；sn：For certain blast furnace burden with ore deposit than mixture charge in
The melt-dropping property total characteristic value of the sintering deposit for being used；In the case of normal, η ＜ 1, its numerical value is smaller, and the blast fumance matches somebody with somebody ore deposit
Than it is better with ore deposit effect, optimized with this and compared, pick out with ore deposit than the preferable blast furnace burden of ore matching efficiency match somebody with somebody ore deposit ratio
Into following steps (ii)；
(ii) ensure that blast furnace produces the blast furnace slag of suitable alkalinity and composition, warp in the case where stove is entered without flux or few flux
Cross and above-mentioned select ore matching efficiency preferably with ore deposit than after to ensure that blast furnace furnace charge has a good metallurgical performance, blast furnace makes
All it is the relatively reasonable blast furnace furnace charge of metallurgical performance with ore deposit ratio, it is only necessary to the relatively reasonable blast furnace of these metallurgical performances
Comprehensive furnace charge with ore deposit ratio is further solved and optimized, therefore, for the metallurgical performance (i) optimized by above-mentioned steps compared with
Carry out the measure of following content than the blast furnace slag that is obtained in ironmaking production with ore deposit for rational blast furnace furnace charge, specially：
1. comprehensive furnace charge of each mixing blast furnace burden with ore deposit than composition is determined by the viscous of the slag obtained by blast furnace process
Degree；
2. the main chemical compositions of the blast furnace slag of measured slag viscosity are chemically examined；
3. with step 2. in blast furnace slag composition as standard, prepare more multicomponent slag with chemical reagent, and determine it
Viscosity and melting temperature, fully expand data surface；
4. the database of prediction blast-furnace slag composition and the relation of slag viscosity is set up with substantial amounts of determination data；
5. according to the chemical composition of each single Charging stock of the comprehensive furnace charge with ore deposit ratio and composition synthesis furnace charge, in conjunction with thing
Material EQUILIBRIUM CALCULATION FOR PROCESS obtain step (i) in preferably out each with ore deposit than different material under the conditions of slag composition；
6. the blast-furnace slag composition and the relation of slag viscosity 4. set up using step, the viscous of slag is speculated from slag composition
Degree, or by directly searching phasor, slag viscosity is checked in, so as to each in obtaining step (i) preferably out is being thrown with ore deposit ratio
Enter the Performance of Slag data predicted before actual production practice；
7. using the Performance of Slag data of above-mentioned prediction, produced in the case where stove is entered without flux or few flux with blast furnace
The blast furnace slag of suitable alkalinity and composition is standard, (i) step is drawn it is relatively good carried out with ore deposit ratio preferred, eliminate and do not meet
This condition with ore deposit ratio, into following steps (iii)；
(iii) comprehensive feed grade blast furnace furnace charge high is selected with ore deposit ratio, that is, obtain from step (ii) preferably out each
With ore deposit is than the comprehensive feed grade of each mixing blast furnace burden of composition and is compared, specially：
1. mixing blast furnace burden with ore deposit than comprehensive feed grade computing formula be following formula：
In formula, Fe：Comprehensive feed grade %；Fei：The feed grade % of certain single Charging stock；Ni：Single Charging stock accounts for holding furnace
The fraction of material；n：The species number of contained single Charging stock in mixture charge；
2. the comprehensive feed grade to each each mixing blast furnace burden with ore deposit than constituting preferably out is compared,
Specially：
I according to mixing blast furnace burden with ore deposit than comprehensive feed grade computing formula (5) to upper one section preferably out each
(5) mixing blast furnace burden than calculating their comprehensive feed grade, i.e., obtains Fe with ore deposit using formula1, Fe2, Fe3... ...,
Fen；
II then compares their numerical value, and (5) above-mentioned formula obtains Fe1, Fe2, Fe3... ..., FenMiddle numerical value is the bigger the better, with this
Pick out the preferable blast furnace burden of comprehensive feed grade and enter following steps (iv) with ore deposit ratio；
(iv) select the lower-cost of mixing blast furnace burden and realize low cost production to ensure blast furnace furnace charge with ore deposit ratio,
Specially：
1. composition with ore deposit than mixing blast furnace burden cost computing formula be following formula：
In formula, C：Mix the cost of blast furnace burden, yuan/ton；Ci：The cost of certain single Charging stock, yuan/ton；Ni：Single Charging stock
Account for the fraction of mixture charge；n：The species number of contained single Charging stock in mixture charge；
2. the cost to each each mixing blast furnace burden with ore deposit than constituting preferably out is compared, specially：
I according to composition with ore deposit than mixing blast furnace burden cost computing formula (6) to upper one section preferably out each mixed
Blast furnace burden is closed with ore deposit than calculating their cost, i.e., (6) obtains C using formula1, C2, C3... ..., Cn；
II then compares their numerical value, and (6) above-mentioned formula obtains C1, C2, C3... ..., CnMiddle numerical value is the smaller the better, is chosen with this
The preferable blast furnace burden of cost for selecting mixing blast furnace burden matches somebody with somebody ore deposit than entering final optimal blast furnace furnace charge preferably out
Mixing ratio.
The technical scheme that further limits of the invention is：
Foregoing reasonable blast furnace furnace charge with ore deposit than method for optimizing, wherein determine it is each mixing blast furnace burden compare group with ore deposit
Into comprehensive furnace charge by the slag obtained by blast furnace process viscosity use viscosity of high-temperature melt analyzer.
The beneficial effects of the invention are as follows：(1) taken into full account that the metallurgical performance of comprehensive furnace charge refers to BF Technology in Bao Steel economy
Target influences, it is to avoid metallurgical performance very poor furnace charge causes smelting condition to deteriorate, in some instances it may even be possible to the possibility for causing blast furnace to stop production
Property；(2) carry out from many aspects with ore deposit than optimization, it meets many requirements met required for right combination burden structure；
(3) in the case where production loss is not caused, using the rational synthesis burden structure of shorter timi requirement and obtain rationally
Comprehensive burden structure in be suitable for the optimal furnace charge mixing ratio of this blast furnace of operator；(4) the correctness that ore matching efficiency is calculated is determined
Accuracy of the reasonable blast furnace furnace charge with ore deposit than optimization is determined；Therefore, the technical program is one real rational rationally high
Stove synthesis furnace charge with ore deposit than method for optimizing.
Specific embodiment
Embodiment 1
The present embodiment be a kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing, comprise the following steps：
(i) ore matching efficiency is selected preferably with ore deposit than to ensure that blast furnace furnace charge has good metallurgical performance, specifically
For：
The low-temperature reduction disintegration of 1. suitable mixing blast furnace burden, i.e., will ensure following formula：
The value requirement for being calculated ensures upper blast furnace stability, in formula, R：The low-temperature reduction disintegration of mixture charge
RDI%；Ri：The low-temperature reduction disintegration RDI% of certain single Charging stock；Ni：Single Charging stock accounts for the fraction of mixture charge；n：Holding furnace
The species number of contained single Charging stock in material；
The high-temperature reductibility of 2. suitable mixing blast furnace burden, i.e., will ensure following formula:
The value requirement for being calculated is not because influence the fuel ratio and yield of blast furnace, in formula, I the reason for high-temperature reductibility：
The reproducibility RI% of mixture charge；Ii：The reproducibility RI% of certain single Charging stock；Ni：Single Charging stock accounts for the fraction of mixture charge；n：
The species number of contained single Charging stock in mixture charge；
3. obtain it is each mixing blast furnace burden with ore deposit than ore matching efficiency and be compared, specially：
I mixing blast furnace burden with ore deposit than the computing formula of ore matching efficiency be defined as following formula：
η=S/s (3)
In formula, η-for certain blast furnace burden with ore deposit than ore matching efficiency；S-for certain blast furnace burden with ore deposit than mixing
The melt-dropping property total characteristic value of furnace charge；S-for certain blast furnace burden with ore deposit than mixture charge used in sintering deposit it is molten
Drop performance total characteristic value；
II to meet above-mentioned steps 1. and 2. respectively with ore deposit than ore matching efficiency be compared：Matched somebody with somebody according to mixing blast furnace burden
Ore deposit than ore matching efficiency computing formula calculate it is each mixing blast furnace burden with ore deposit than ore matching efficiency, i.e., using following formula：
η n=Sn/sn n=1,2,3 ... ..., n (4)
Obtain η 1, η 2, η 3 ... ..., η n, in formula, η n：Certain blast furnace burden with ore deposit than ore matching efficiency；Sn：For certain is high
Stove furnace charge with ore deposit than mixture charge melt-dropping property total characteristic value；sn：For certain blast furnace burden with ore deposit than mixture charge in
The melt-dropping property total characteristic value of the sintering deposit for being used；In the case of normal, η ＜ 1, its numerical value is smaller, and the blast fumance matches somebody with somebody ore deposit
Than it is better with ore deposit effect, optimized with this and compared, pick out with ore deposit than the preferable blast furnace burden of ore matching efficiency match somebody with somebody ore deposit ratio
Into following steps (ii)；
(ii) ensure that blast furnace produces the blast furnace slag of suitable alkalinity and composition, warp in the case where stove is entered without flux or few flux
Cross and above-mentioned select ore matching efficiency preferably with ore deposit than after to ensure that blast furnace furnace charge has a good metallurgical performance, blast furnace makes
All it is the relatively reasonable blast furnace furnace charge of metallurgical performance with ore deposit ratio, it is only necessary to the relatively reasonable blast furnace of these metallurgical performances
Comprehensive furnace charge with ore deposit ratio is further solved and optimized, therefore, for the metallurgical performance (i) optimized by above-mentioned steps compared with
Carry out the measure of following content than the blast furnace slag that is obtained in ironmaking production with ore deposit for rational blast furnace furnace charge, specially：
1. comprehensive furnace charge of each mixing blast furnace burden with ore deposit than composition is determined by the viscous of the slag obtained by blast furnace process
Degree；Each mixing blast furnace burden is wherein determined to be adopted by the viscosity of the slag obtained by blast furnace process than the comprehensive furnace charge for constituting with ore deposit
Viscosity of high-temperature melt analyzer is used, specially：
Determine device：
Viscosity experiment uses viscosity of high-temperature melt analyzer, and the fusing of slag is can obtain from resulting viscosity-hygrogram
Degree (temperature of turning point) warm in nature, device for measuring viscosity is divided into viscosimeter and high temperature furnace two parts, and viscosimeter is by computer, control
The part such as cabinet, elevating mechanism and steel wire measuring staff hangar system constitutes, and melting the high temperature furnace of metallurgical melt has low-voltage, big electricity
The characteristics of stream, temperature may be up to 1600 DEG C；Most of operation of a full set of experimental provision can computerized control, such as viscosity test
When data processing, Drawing of Curve and preservation and printed report；
Assay method：
A () opens cooling water successively, the main circuit power and computer power supply connected on panel, opens temperature-controlled power,
Open computer operation measurement and control program；
B () is powered by certain temperature increasing schedule to molybdenum wire furnace；
The correction of (c) viscometer constant K values；
D () high temperature furnace is powered when being warmed up to 1200 DEG C, will fill the graphite crucible (crucible size of 260g granulated slags (or block slag)
It is 60 × 100mm) it is put into stove interior base, when reaching nominative testing temperature (such as 1500 DEG C), constant temperature 20 minutes, sample fusion is melting down
And stir after, measurement crucible in melt cinder face to fire door distance, so as to determine measuring head decline depth；
E be down to measuring head at 10-15 millimeters of crucible bottom by (), and in crucible center, starting motor makes test
Head rotation, measuring staff is put into melt to be measured, and after spin stabilization, start recording data, computer can point out input data to record
Filename, survey data and just record in the file that need to be recorded；
F (), with 5 DEG C/minute of reducing furnace temperature, temperature and viscosity number is recorded every 10 DEG C when η-T curve is surveyed, connecing
(when i.e. slag solidifies soon) should reduce rate of temperature fall (about 2 DEG C/minute) before nearly transition temperature, can thus draw the slag
η-T curve；
2. the main chemical compositions of the blast furnace slag of measured slag viscosity are chemically examined；
3. with step 2. in blast furnace slag composition as standard, prepare more multicomponent slag with chemical reagent, and determine it
Viscosity and melting temperature, fully expand data surface；
4. the database of prediction blast-furnace slag composition and the relation of slag viscosity is set up with substantial amounts of determination data；
5. according to the chemical composition of each single Charging stock of the comprehensive furnace charge with ore deposit ratio and composition synthesis furnace charge, in conjunction with thing
Material equilbristat calculate step (i) in preferably out each with ore deposit than different material under the conditions of slag composition；(this step is
Those skilled in the art have common knowledge, are not described in detail herein.)
6. the blast-furnace slag composition and the relation of slag viscosity 4. set up using step, are pushed away from the result of calculation of slag composition
The viscosity of slag is surveyed, or by directly lookup phasor, checks in slag viscosity, so as to each in obtaining step (i) preferably out
Performance of Slag data with ore deposit than the prediction before input actual production practice；
7. using the Performance of Slag data of above-mentioned prediction, produced in the case where stove is entered without flux or few flux with blast furnace
The blast furnace slag of suitable alkalinity and composition is standard, (i) step is drawn it is relatively good carried out with ore deposit ratio preferred, eliminate and do not meet
This condition with ore deposit ratio, into following steps (iii)；
(iii) comprehensive feed grade blast furnace furnace charge high is selected with ore deposit ratio, that is, obtain from step (ii) preferably out each
With ore deposit is than the comprehensive feed grade of each mixing blast furnace burden of composition and is compared, specially：
1. mixing blast furnace burden with ore deposit than comprehensive feed grade computing formula be following formula：
In formula, Fe：Comprehensive feed grade %；Fei：The feed grade % of certain single Charging stock；Ni：Single Charging stock accounts for holding furnace
The fraction of material；n：The species number of contained single Charging stock in mixture charge；
2. the comprehensive feed grade to each each mixing blast furnace burden with ore deposit than constituting preferably out is compared,
Specially：
I according to mixing blast furnace burden with ore deposit than comprehensive feed grade computing formula (5) to upper one section preferably out each
(5) mixing blast furnace burden than calculating their comprehensive feed grade, i.e., obtains Fe with ore deposit using formula1, Fe2, Fe3... ...,
Fen；
II then compares their numerical value, and (5) above-mentioned formula obtains Fe1, Fe2, Fe3... ..., FenMiddle numerical value is the bigger the better, with this
Pick out the preferable blast furnace burden of comprehensive feed grade and enter following steps (iv) with ore deposit ratio；
(iv) select the lower-cost of mixing blast furnace burden and realize low cost production to ensure blast furnace furnace charge with ore deposit ratio,
Specially：
1. composition with ore deposit than mixing blast furnace burden cost computing formula be following formula：
In formula, C：Mix the cost of blast furnace burden, yuan/ton；Ci：The cost of certain single Charging stock, yuan/ton；Ni：Single Charging stock
Account for the fraction of mixture charge；n：The species number of contained single Charging stock in mixture charge；
2. the cost to each each mixing blast furnace burden with ore deposit than constituting preferably out is compared, specially：
I according to composition with ore deposit than mixing blast furnace burden cost computing formula (6) to upper one section preferably out each mixed
Blast furnace burden is closed with ore deposit than calculating their cost, i.e., (6) obtains C using formula1, C2, C3... ..., Cn；
II then compares their numerical value, and (6) above-mentioned formula obtains C1, C2, C3... ..., CnMiddle numerical value is the smaller the better, is chosen with this
The preferable blast furnace burden of cost for selecting mixing blast furnace burden matches somebody with somebody ore deposit than entering final optimal blast furnace furnace charge preferably out
Mixing ratio.
In addition to the implementation, the present invention can also have other embodiment.All use equivalents or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (2)
1. a kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing, it is characterised in that：Comprise the following steps：
(i) select ore matching efficiency it is good with ore deposit than to ensure that blast furnace furnace charge has good metallurgical performance, specially：
The low-temperature reduction disintegration of 1. suitable mixing blast furnace burden, i.e., will ensure following formula：
The value for being calculated ensure that upper blast furnace stability, in formula, R：The low-temperature reduction disintegration RDI% of mixture charge；
Ri：The low-temperature reduction disintegration RDI% of certain single Charging stock；Ni：Single Charging stock accounts for the fraction of mixture charge；n：Institute in mixture charge
Species number containing single Charging stock；
The high-temperature reductibility of 2. suitable mixing blast furnace burden, i.e., will ensure following formula:
The value for being calculated ensure that not because influenceing the fuel ratio and yield of blast furnace, in formula, I the reason for high-temperature reductibility：
The reproducibility RI% of mixture charge；Ii：The reproducibility RI% of certain single Charging stock；Ni：Single Charging stock accounts for the fraction of mixture charge；n：
The species number of contained single Charging stock in mixture charge；
3. obtain it is each mixing blast furnace burden with ore deposit than ore matching efficiency and be compared, specially：
I mixing blast furnace burden with ore deposit than the computing formula of ore matching efficiency be defined as following formula：
η=S/s (3)
In formula, η-for certain blast furnace burden with ore deposit than ore matching efficiency；S-for certain blast furnace burden with ore deposit than mixture charge
Melt-dropping property total characteristic value；S-for certain blast furnace burden with ore deposit than mixture charge used in sintering deposit molten drop
Can total characteristic value；
II to meet above-mentioned steps 1. and 2. respectively with ore deposit than ore matching efficiency be compared：Ore deposit ratio is matched somebody with somebody according to mixing blast furnace burden
Ore matching efficiency computing formula calculate it is each mixing blast furnace burden with ore deposit than ore matching efficiency, i.e., using following formula：
η n=Sn/sn n=1,2,3 ... ..., n (4)
Obtain η 1, η 2, η 3 ... ..., η n, in formula, η n：Certain blast furnace burden with ore deposit than ore matching efficiency；Sn：It is certain State of Blast Furnace
Material with ore deposit than mixture charge melt-dropping property total characteristic value；sn：By certain blast furnace burden with ore deposit than mixture charge in made
The melt-dropping property total characteristic value of sintering deposit；In the case of normal, η ＜ 1, its numerical value is smaller, the blast fumance with ore deposit than
It is better with ore deposit effect, optimized with this and compared, pick out with ore deposit than the good blast furnace burden of ore matching efficiency with ore deposit ratio enter with
Lower step is (ii)；
(ii) ensure that blast furnace produces the blast furnace slag of suitable alkalinity and composition in the case where stove is entered without flux or few flux, specifically
For：
1. determine it is each mixing blast furnace burden with ore deposit than constitute comprehensive furnace charge by the slag obtained by blast furnace process viscosity；
2. the chemical composition of the blast furnace slag of measured slag viscosity is chemically examined；
3. with step 2. in blast furnace slag composition as standard, prepare more multicomponent slag with chemical reagent, and determine its viscosity
And melting temperature, fully expand data surface；
4. the database of prediction blast-furnace slag composition and the relation of slag viscosity is set up with substantial amounts of determination data；
5. it is flat in conjunction with material according to the chemical composition of each single Charging stock of the comprehensive furnace charge with ore deposit ratio and composition synthesis furnace charge
Weighing apparatus be calculated step (i) in preferably out each with ore deposit than different material under the conditions of slag composition；
6. the blast-furnace slag composition and the relation of slag viscosity 4. set up using step, the viscosity of slag is speculated from slag composition,
Or by directly searching phasor, slag viscosity is checked in, so as to each in obtaining step (i) preferably out puts into ore deposit ratio
The Performance of Slag data predicted before actual production practice；
7. using the Performance of Slag data of above-mentioned prediction, it is suitable to be produced in the case where stove is entered without flux or few flux with blast furnace
The blast furnace slag of basicity and composition is standard, (i) step is drawn it is good carried out with ore deposit ratio preferred, eliminate and do not meet this condition
With ore deposit ratio, into following steps (three)；
(3) comprehensive feed grade blast furnace furnace charge high is selected with ore deposit ratio, that is, obtain and match somebody with somebody from step (ii) preferably out each
Ore deposit than composition each mixing blast furnace burden comprehensive feed grade and be compared, specially：
1. mixing blast furnace burden with ore deposit than comprehensive feed grade computing formula be following formula：
In formula, Fe：Comprehensive feed grade %；Fei：The feed grade % of certain single Charging stock；Ni：Single Charging stock accounts for mixture charge
Fraction；n：The species number of contained single Charging stock in mixture charge；
2. the comprehensive feed grade to each each mixing blast furnace burden with ore deposit than constituting preferably out is compared, specifically
For：
I according to mixing blast furnace burden with ore deposit than comprehensive feed grade computing formula (5) to upper one section each mixing preferably out
(5) blast furnace burden than calculating their comprehensive feed grade, i.e., obtains Fe with ore deposit using formula1, Fe2, Fe3... ..., Fen；
II then compares their numerical value, and (5) above-mentioned formula obtains Fe1, Fe2, Fe3... ..., FenMiddle numerical value is the bigger the better, and is selected with this
Go out the good blast furnace burden of comprehensive feed grade and enter following steps (iv) with ore deposit ratio；
(iv) select mixing blast furnace burden low cost with ore deposit ratio with ensure blast furnace furnace charge realize low cost production, specifically
For：
1. composition with ore deposit than mixing blast furnace burden cost computing formula be following formula：
In formula, C：Mix the cost of blast furnace burden, yuan/ton；Ci：The cost of certain single Charging stock, yuan/ton；Ni：Single Charging stock accounts for mixed
Close the fraction of furnace charge；n：The species number of contained single Charging stock in mixture charge；
2. the cost to each each mixing blast furnace burden with ore deposit than constituting preferably out is compared, specially：
I according to composition with ore deposit than mixing blast furnace burden cost computing formula it is (6) high to upper one section each mixing preferably out
(6) stove furnace charge than calculating their cost, i.e., obtains C with ore deposit using formula1, C2, C3... ..., Cn；
II then compares their numerical value, and (6) above-mentioned formula obtains C1, C2, C3 ... ..., and numerical value is the smaller the better in Cn, is selected with this
The good blast furnace burden of cost for going out to mix blast furnace burden coordinates with ore deposit than entering final optimal blast furnace furnace charge preferably out
Ratio.
2. rationally blast furnace furnace charge as claimed in claim 1 with ore deposit than method for optimizing, it is characterised in that：Determine each mixing
Blast furnace burden is to use viscosity of high-temperature melt by the viscosity of the slag obtained by blast furnace process than the comprehensive furnace charge for constituting with ore deposit
Analyzer determination method.
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| CN201410717304.XA CN104573316B (en) | 2014-12-01 | 2014-12-01 | A kind of reasonable blast furnace furnace charge with ore deposit than method for optimizing |
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| JPS6156211A (en) * | 1984-08-23 | 1986-03-20 | Sumitomo Metal Ind Ltd | Method for operating blast furnace |
| CN102722652A (en) * | 2012-06-01 | 2012-10-10 | 攀钢集团攀枝花钢钒有限公司 | Blast furnace smelting cost calculating and optimizing method |
| CN102912047A (en) * | 2012-10-16 | 2013-02-06 | 南京钢铁股份有限公司 | Optimal selection method capable of increasing yield of blast furnace |
| CN103031393A (en) * | 2012-10-16 | 2013-04-10 | 南京钢铁股份有限公司 | Method for lowering production cost of blast furnace by changing raw ore type and relative proportion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6156211A (en) * | 1984-08-23 | 1986-03-20 | Sumitomo Metal Ind Ltd | Method for operating blast furnace |
| CN102722652A (en) * | 2012-06-01 | 2012-10-10 | 攀钢集团攀枝花钢钒有限公司 | Blast furnace smelting cost calculating and optimizing method |
| CN102912047A (en) * | 2012-10-16 | 2013-02-06 | 南京钢铁股份有限公司 | Optimal selection method capable of increasing yield of blast furnace |
| CN103031393A (en) * | 2012-10-16 | 2013-04-10 | 南京钢铁股份有限公司 | Method for lowering production cost of blast furnace by changing raw ore type and relative proportion |
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