CN108876050A - A kind of setting of the main processing procedure of iron and steel enterprise's contract and automatic switching method - Google Patents

A kind of setting of the main processing procedure of iron and steel enterprise's contract and automatic switching method Download PDF

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CN108876050A
CN108876050A CN201810681697.1A CN201810681697A CN108876050A CN 108876050 A CN108876050 A CN 108876050A CN 201810681697 A CN201810681697 A CN 201810681697A CN 108876050 A CN108876050 A CN 108876050A
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汪恭书
胡雪松
徐文杰
唐立新
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Northeastern University China
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Abstract

The present invention provides setting and the automatic switching method of a kind of main processing procedure of iron and steel enterprise's contract, is related to technical field of metallurgical automatic control.This method passes through the fitting relation determined between client's contract requirements and unit parameter, establish the mathematical model of contract relations of distribution on unit, under conditions of guaranteeing process constraint, it is to accurately calculate foundation with model, using the algorithm framework based on Evolution of Population strategy, and the chromosome for designing a kind of discrete codes (decoding) enough makes the derivation algorithm of strategy, the arithmetic result is decoded with the processing procedure allocation plan of each contract of determination, it is final to execute major-minor processing procedure conversion operation to realize the global optimization of contract processing procedure.Method proposed by the invention, which balanced can make steel, reduces intersection logistics the Productivity Allocation between the parallel unit of hot rolling, the feed relationship of coordination steel-making and hot-rolled process, and raising utilization rate of equipment and installations reduces production and inventory cost.

Description

A kind of setting of the main processing procedure of iron and steel enterprise's contract and automatic switching method
Technical field
The present invention relates to technical field of metallurgical automatic control more particularly to a kind of setting of the main processing procedure of iron and steel enterprise's contract with Automatic switching method.
Background technique
Steel production process is directed not only to the serial production process with front and back feed relationship, and same production work There are also multiple LPT devices for sequence.Iron and steel enterprise is produced by contract tissue, and each contract is required before being put into production according to product Quality requirement designs one or more alternative process route, referred to as manufacturing process flow, abbreviation processing procedure.In actual production Cheng Zhong, it is thus necessary to determine which processing procedure is main processing procedure, which processing procedure is secondary processing procedure.Usual preparation and production tissue, especially produces The layout of planning and scheduling is executed by main processing procedure.But in the actual production process, when equipment working condition or contract composition hair When changing, production process route can also be changed by the role transforming between major-minor processing procedure.
Currently, the main processing procedure of iron and steel enterprise's contract is that based on contract quality requirement is set in the Product Quality Design stage , there is no the influences for considering that designed main processing procedure works out production logistics, Production-Plan and scheduling, on organization management There is very big randomness, lacks accuracy and science.Since production contract quantity is more, only determined from Product Quality Design angle Main processing procedure is easy to appear and intersects that logistics capacity is high, unit Productivity Allocation is unbalanced, production equipment low efficiency, phenomena such as quantity in stock is high, To increase production and logistics cost.Therefore, in the requirement of comprehensive product Quality Design and the premise of production logistics equilibrium index Under, how the main processing procedure of optimal setting contract has become the key technical problem urgently to be resolved that iron and steel enterprise is faced.
In addition, the conversion of present steel enterprise contract major-minor processing procedure and the establishment of production plan operate separately.With The execution of production, when working out a production plan find contract steel-making (or hot rolling) different workshops distribution it is unbalance, under the influence of one When the organization of production of step, generallys use based on the manual manipulation method of planner's subjective experience and major-minor system is carried out to part contract Journey conversion；This method usually counts point of the main processing procedure in different steelshops (and different hot rolling workshops) of all contracts first Then cloth situation needs transformation of ownership journey contract total amount according to the capacity ratio calculating of different steelshops (and different hot rolling workshops), Then the contract that can switch to the main processing procedure of target to all candidate secondary processing procedures owes amount non-emission reduction sequence by steel making working procedure, then successively in the past Selected section contract carries out processing procedure conversion until meeting the requirement of transformation of ownership journey contract total amount backward, and deficient amount finally small to part is (insufficient One heat steel water weight) contract with same steel batching is main according to the processing procedure conversion for accounting for intersecting logistics.Due to iron and steel enterprise Contract involved in production process is thousands of, and the secondary processing procedure of candidate of contract also has productions that are multiple, while also needing complicated Technique, producing line logistics layout, contract STEELMAKING PRODUCTION owe the amount unequal many factors of size, using based on planner's subjective experience Turn manufacturing method thereof by hand to have the following problems：
(1) manual method be discovery contract the different workshops of steel-making (or hot rolling) be distributed it is unbalance after just operate, Therefore manual processing procedure conversion is a passive process, does not carry out integrating consideration with the establishment of Production planning and scheduling, before shortage Looking forward or upwards property.
(2) manual method is ranked up all contracts by simple rule, then selects to close with serial sequential strategy again With processing procedure conversion is carried out, for optimization angle there is very big short-sighted property, contract system of every conversion in this serial sequential strategy Journey only considered current optimization performance, not account for influence of the subsequent contract processing procedure conversion to global optimization performance.
(3) production capacity that manual method considers different steelshops (and different hot rolling workshops) only by qualitative analysis is equal Weigh index, does not account for main processing procedure conversion and works out other indexs (including intersection logistics capacity, collection batch production etc.) to planning and scheduling Influence, the effect for more not carrying out quantification calculating to technical indicator and economic indicator, therefore processing procedure being caused to be converted is very big Degree is horizontal dependent on the operation of business personnel, lacks to the solution of the technical problem quantitative and scientific.
Therefore, by analyzing process for producing steel and iron process and the profound of Product Quality Design rule, using quantification The method of scientific algorithm carrys out the conversion of decision contract processing procedure, under the premise of guaranteeing product quality and technological feasibility, by contract The conversion operation of major-minor processing procedure and the establishment integrated optimization of production plan, to give full play to unit production capacity and make production logistics in order, Horizontal to optimization process for producing steel and iron and Product Quality Design, promotion production process regulatory level, reduction production cost all have It is of great significance.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above shortcomings of the prior art, provide a kind of iron and steel enterprise's contract master The setting of processing procedure and automatic switching method coordinate steel-making to reach the sharing of load between balanced steel-making and the parallel unit of hot rolling With the feed relationship of hot-rolled process, reduces and intersect logistics, the purpose for improving utilization rate of equipment and installations, reducing production and inventory cost.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：A kind of main processing procedure of iron and steel enterprise's contract Setting and automatic switching method, include the following steps：
Step 1：Determine the technological parameter of continuous casting installation for casting and the technological parameter of equipment of hot rolling；
The technological parameter of the continuous casting installation for casting include the topology layout of continuous casting installation for casting, the basic day production capacity of each continuous casting installation for casting, Service information allows width range of casting, mould wall thickness, the width range for allowing to adjust；
The technological parameter of the equipment of hot rolling include the topology layout of equipment of hot rolling, the basic day production capacity of each equipment of hot rolling, Service information, the maximum rolling width of permission, the maximum rolling thickness of permission, maximum width survey pressure amount；
Step 2：Contract specification parameter is obtained, contract specification parameter includes contract first choice steel grade, contractual delivery phase, contract friendship Goods type, contract refining route, contract status, contract order width, contract order thickness, contract order weight, contract are corresponding Slab Nominal Width bound, nominal length bound, slab nominal thickness, slab rated weight bound；
The contractual delivery type, including by week delivery, monthly delivery, quarterly deliver goods；
The determining contract first choice steel grade be by comparing the expected content of contract main chemical elements and its in all steel grades What the difference of content was chosen, that is, by formula (1) calculate contract i main chemical elements it is expected content and its in any steel grade G content difference and Δig, then specify ΔigIt is worth the preferred steel grade that the smallest steel grade is contract i；
Wherein,WithIt is the bound requirement of chemical element e included in steel grade g；reiExpression contract i packet The expectation content of the chemical element e contained, EiThe chemical element set that expression contract i need to be chemically examined；
Step 3：Determine the preferential fitting relation between contract and equipment：The work of the continuous casting installation for casting according to determined by step 1 Contract specification parameter acquired in skill parameter, the technological parameter of equipment of hot rolling and step 2, establishes contract in the form of entity sets The fitting relation between equipment；According to fitting relation between the contract and equipment established, on the basis of logistical balancing principle, Determine preferential fitting relation between contract and equipment；
It is described that fitting relation between contract and equipment is established in the form of entity sets, it is by by continuous casting and hot rolling process What the method that the technique limitation of production process is described as mathematical model constraint condition was realized, specifically comprise the following steps：
Step 3-1：The process constraint for establishing equipment Yu contract set relation respectively, as shown in formula (2) and (3), i.e.,：It is given J-th of equipment of continuous casting working procedure is determined to the contract set processed on the deviceGiven j-th of equipment of hot-rolled process, really Surely the contract set that can be processed on the device
Wherein, N and P respectively indicates the contract set by continuous casting and hot rolling process and the contract collection merely through hot-rolled process It closes, Ω1、Ω2Respectively indicate the cluster tool of continuous casting working procedure and the cluster tool of hot-rolled process, wiAnd hiRespectively indicate i pairs of contract Answer the Nominal Width and nominal thickness of slab；On the rolling width for respectively indicating j-th of equipment of continuous casting working procedure Limit and lower limit,The rolling width upper and lower bound of j-th of equipment of hot-rolled process is respectively indicated,Point Not Biao Shi continuous casting working procedure, j-th of equipment of hot-rolled process rolling thickness, djIndicate the maximum width of j-th of equipment of hot-rolled process Lateral pressure amount；
Step 3-2：The process constraint for establishing contract Yu cluster tool relationship respectively, as shown in formula (4) and (5), i.e.,：It is given Contract i determines it in continuous casting working procedure optional equipment setWith hot-rolled process optional equipment set
So far it completes and establishes fitting relation between contract and equipment in the form of entity sets；
According to fitting relation between the contract and equipment established described in step 3, on the basis of logistical balancing principle, It determines preferential fitting relation between contract and equipment, is by mapping continuous casting working procedure and hot-rolled process production logistics rapport It is realized for operation rules, operation rules is as follows：
Rule one：Straight line logistics if it exists, then select manufacturing process corresponding to straight line logistics for main processing procedure, remaining logistics is Secondary processing procedure.Multiple straight line logistics if it exists, selecting manufacturing process corresponding to the basic day maximum continuous casting installation for casting of production capacity is main processing procedure, Remaining logistics is secondary processing procedure；
Rule two：If it does not exist straight line logistics and there are multiple intersection logistics, select the basic day maximum continuous casting of production capacity to set Standby corresponding manufacturing process is main processing procedure, remaining logistics is secondary processing procedure；
Rule three：If it does not exist straight line logistics and there are multiple intersection logistics, select the basic day maximum hot rolling of production capacity to set Standby corresponding manufacturing process is main processing procedure, remaining logistics is secondary processing procedure；
Described regular one, the straight line logistics in rule two and rule three refers to that the Infrared measurement technique for hot-slabs after continuous casting installation for casting can The material stream that equipment of hot rolling heating furnace directly carries out following process is directly entered by roller-way；The intersection logistics refer to by Infrared measurement technique for hot-slabs after continuous casting installation for casting, need after offline cooling treatment using trolley be transported to equipment of hot rolling heating furnace carry out it is subsequent plus The material stream of work；
Step 4：Contract is produced for given full processing procedure, founding mathematical models quantify contract processing procedure select permeability Change description, the selection of setting, constraint condition including decision variable and the determination of objective function；
The setting of decision variable described in step 4 includes：
(a) 0-1 decision variable x is setij；When contract i selects j-th of equipment of continuous casting working procedure as contract continuous casting working procedure master When processing procedure, xijValue is 1；Otherwise xijValue is 0；
(b) 0-1 decision variable y is setij；When contract i selects j-th of equipment of hot-rolled process as contract hot-rolled process master When processing procedure, yijValue is 1；Otherwise yijValue is 0；
Constraint condition described in step 4 includes：
(c) process constraint and contract and the main system of hot-rolled process equipment that contract and the main processing procedure of continuous casting working procedure equipment limit are established The process constraint of degree, respectively as shown in formula (6) and formula (7), i.e., restriction contract is only capable of selection Unique Device in continuous casting working procedure Main processing procedure, contract as the contract in the process are only capable of selecting Unique Device as the contract in the work in continuous casting hot-rolled process The main processing procedure of sequence；
(d) process constraint for establishing the limitation of continuous casting and hot rolling processing apparatus production capacity, as shown in formula (8)~(11), i.e., restriction connects The contract total amount that casting-hot-rolled process is processed on each device is close to its desired wt；It is being set beyond part and insufficient section In fixed error range；
Wherein,WithIt is the part that contract for processing work total amount exceeds with insufficient desired wt in continuous casting working procedure equipment respectively,WithIt is the part that contract for processing work total amount exceeds with insufficient desired wt in hot-rolled process equipment respectively；It is continuous casting working procedure Equipment desired wt accounts for the percentage of contract total weight,It is the percentage that hot-rolled process equipment desired wt accounts for contract total weight Than,It is to process client's contract total amount in continuous casting working procedure equipment to exceed and the insufficient desired wt part upper limit,It is hot-rolled process Client's contract total amount is processed in equipment to exceed and the insufficient desired wt part upper limit, qiIt is that contract requirements owe amount；
Objective function described in step 4 includes：
(e) it minimizes and intersects logistics contract total weight, be shown below；
(f) contract for processing work total amount and desired wt deviation in continuous casting working procedure and each equipment of hot-rolled process, such as following formula are minimized It is shown；
(g) linear weighted function is carried out to multiple objective functions expressed by formula (12) and formula (13), obtains final target letter Number, as shown in formula (14)；
Wherein, λ1、λ2、λ3∈ [0,1] indicates the weight coefficient of different target function, λ1+λ2+λ3=1；
Step 5：One kind is designed based on discrete codes/decoded Evolution of Population algorithm for mathematics described in solution procedure 4 Model, to obtain contract processing procedure optimizing decision scheme；
Discrete codes/the decoding is for constructing population at individual, a solution of the individual correspondence problem of population；
The individual Constructing Policy of discrete codes：If (L1+L2) dimensional vectorTable A solution for showing problem has following two regulations to vector S：
Regulation one：Vector dimension is determined by contract number, that is, meets formula (15)：
L1=| N |+| P |, L2=| N | (15)
Regulation two：Vector element value range is determined by continuous casting working procedure or hot-rolled process number of devices, that is, meets formula (16) (17)：
Discrete decoded individual Translation Strategy：Either element a in vector SlOr bmMathematical model described in corresponding step 4 becomes Measure xijOr yijThe line index i and column index j that value is 1, i.e.,：I=l,WhereinIt indicates to be not more than alMinimum it is whole Number；
Based on the basic framework that discrete codes/decoded Evolution of Population algorithm is using differential evolution algorithm described in step 5 It realizes, specific sub-step is as follows：
Step 5-1：Initialization algorithm parameter；Including algorithm maximum number of iterations maxIter, algorithm population scale NP, become Different coefficient F, selection coefficient CR, algorithm history preferably solve BestV, current iteration number iter=0；
Step 5-2：Initialization population；NP initial individuals are generated at random, according to discrete codes individual Constructing Policy, the Idx individual is represented asWherein Solution S is checked according to constraint formula (6) and formula (7) firstjFeasibility carries out specific aim to solution according to conflict reason if infeasible It repairs；Then individuals all in population are translated by correspondence problem solution according to the individual Translation Strategy of discrete decoding, and according to formula (14) the corresponding adaptive value of each individual is calculated, f (S is denoted asj)；The smallest individual of adaptive value is referred to as optimum individual, and adaptive value is BestV；
Step 5-3：Mutation operation is carried out to individual every in population and crossover operation, specific sub-step are as follows：
Step 5-3-1：In the set { S that individual is constituted1, S2..., SNPIn choose three be different from target individual SjAnd mutually Different individual Sr1, Sr2, Sr3, i.e. j ≠ r1 ≠ r2 ≠ r3；
Step 5-3-2：From one variation step factor F of equally distributed real number interval [j/NP, 1] stochastic productionj；
Step 5-3-3：By individual Sj, Sr1, Sr2, Sr3Calculus of differences is carried out, the individual V after obtaining mutation operationj, such as following formula It is shown；
Vj=Sr1+Fj(Sr2-Sr3) (18)
Step 5-3-4：It is each element stochastic production one of a volume matrix from equally distributed real number interval [j/NP, 1] A crossover probability factor CRl；
Step 5-3-5：By each pair of individual SjAnd VjCrossover operation is executed, is shown below, new individual U is producedj；
Wherein,Indicate UjInternal element,Indicate VjInternal element,Indicate SjInternal element, j=1, 2 ..., NP, l=1,2 ..., L1+L2,It indicates to obey random number between (0,1) being just distributed very much；
Step 5-3-6：Judge whether elementOrIf so, to new individual UjIt carries out at boundary condition Reason, is shown below, and otherwise, completes crossover operation；
Wherein, L indicates elementValue range lower limit, U indicate elementThe value range upper limit；
Step 5-4：Each new individual U is calculated according to formula (14)jAdaptive value, be denoted as f (Uj)；Compare f (Uj) and f (Sj), And individual is updated；To the individual collections { S of update1, S2..., SNPStep 5-3-1 to step 5-3-6 is repeated, Until meeting stop condition；
Step 5-5：In final individual collective { S1, S2..., SNPIn selection target functional value f (Sj) the smallest individual S*, call discrete decoded individual Translation Strategy to be decoded, obtain final contract processing procedure optimizing decision scheme；
Step 6：Contract processing procedure optimizing decision scheme is obtained according to step 5, executes contract major-minor processing procedure conversion process, and press Production is worked out a production plan and organized to the main processing procedure of contract after conversion；
The contract major-minor processing procedure conversion includes following sub-step：
Step 6-1：Determining that the problem of obtaining by step 5 solves corresponding processing procedure is contract uniquely main processing procedure；It sets in step 3 and obtains Remaining processing procedure obtained is secondary processing procedure；
Step 6-2：Owe contract each process to amount, each reservoir area storage is converted to main processing procedure.
Generated beneficial effect is by adopting the above technical scheme：A kind of main system of iron and steel enterprise's contract provided by the invention The setting of journey and automatic switching method can not only assist production management personnel to design and produce organization arrangement from processing quality Common viewing angle grasps the processing procedure layout scenarios of all contracts, and is laid out according to this processing procedure and formulates production plan scheme；And it can also It makes in order and is subordinate to corresponding relationship between production contract and equipment, provided effectively to make steel with the establishment of the planning and scheduling of hot-rolled process Support.A kind of iron and steel enterprise's contract processing procedure optimal setting of the invention and automatic switching method efficient balance steel-making parallel production The produce load in workshop and hot rolling parallel production workshop improves the smoothness of the feed linking of steel-making and hot-rolled process, reduces Unnecessary intersection logistics capacity improves utilization rate of equipment and installations and production efficiency, improves to improve straight line logistic efficiency Contract punctual delivery ability.
Detailed description of the invention
Fig. 1 is setting and the automatic switching method flow chart of the main processing procedure of iron and steel enterprise's contract provided in an embodiment of the present invention；
Fig. 2 is the producing line schematic layout pattern of continuous casting and hot rolling.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below Example is not intended to limit the scope of the invention for illustrating the present invention.
A kind of setting of main processing procedure of iron and steel enterprise's contract of the present embodiment and automatic switching method, as shown in Figure 1, specific steps As described below.
Step 1：Determine the technological parameter of continuous casting installation for casting and the technological parameter of equipment of hot rolling；
The technological parameter of the continuous casting installation for casting include the topology layout of continuous casting installation for casting, the basic day production capacity of each continuous casting installation for casting, Service information allows width range of casting, mould wall thickness, the width range for allowing to adjust；
The technological parameter of the equipment of hot rolling include the topology layout of equipment of hot rolling, the basic day production capacity of each equipment of hot rolling, Service information, the maximum rolling width of permission, the maximum rolling thickness of permission, maximum width survey pressure amount.
Step 2：Obtain contract specification parameter, including contract first choice steel grade, contractual delivery phase, contractual delivery type, contract Refining route, contract status, contract order width, contract order thickness, contract order weight, contract correspond to slab Nominal Width Bound, nominal length bound, slab nominal thickness, slab rated weight bound；
The contractual delivery type, including by week delivery, monthly delivery, quarterly deliver goods.
The determining contract first choice steel grade be by comparing the expected content of contract main chemical elements and its in all steel grades What the difference of content was chosen, that is, by formula (1) calculate contract i main chemical elements it is expected content and its in any steel grade G content difference and Δig, then specify ΔigIt is worth the preferred steel grade that the smallest steel grade is contract i；
Wherein,WithIt is the bound requirement of chemical element e included in steel grade g；reiExpression contract i packet The expectation content of the chemical element e contained, EiThe chemical element set that expression contract i need to be chemically examined.
Step 3：Determine the preferential fitting relation between contract and equipment：The work of the continuous casting installation for casting according to determined by step 1 Contract specification parameter acquired in skill parameter, the technological parameter of equipment of hot rolling and step 2, established in the form of entity sets contract with Fitting relation between equipment；According to fitting relation between the contract and equipment established, on the basis of logistical balancing principle, really Determine preferential fitting relation between contract and equipment；
It is described that fitting relation between contract and equipment is established in the form of entity sets, it is by by continuous casting and hot rolling process What the method that the technique limitation of production process is described as mathematical model constraint condition was realized, specifically comprise the following steps：
Step 3-1：Process constraint (2) and (3) of equipment and contract set relation are established respectively, i.e.,：Given continuous casting working procedure J-th of equipment is determined to the contract set processed on the deviceGiven j-th of equipment of hot-rolled process, is determined to The contract set processed in the equipment
Wherein, N and P respectively indicates the contract set by continuous casting and hot rolling process and the contract collection merely through hot-rolled process It closes, Ω1、Ω2Respectively indicate the cluster tool of continuous casting working procedure and the cluster tool of hot-rolled process, wiAnd hiRespectively indicate i pairs of contract Answer the Nominal Width and nominal thickness of slab；On the rolling width for respectively indicating j-th of equipment of continuous casting working procedure Limit and lower limit,The rolling width upper and lower bound of j-th of equipment of hot-rolled process is respectively indicated,Point Not Biao Shi continuous casting working procedure, j-th of equipment of hot-rolled process rolling thickness, djIndicate the maximum width of j-th of equipment of hot-rolled process Lateral pressure amount；
Step 3-2：Process constraint (4) and (5) of contract and cluster tool relationship are established respectively, i.e.,：Given contract i, really It is determined in continuous casting working procedure optional equipment setWith hot-rolled process optional equipment set
So far it completes and establishes fitting relation between contract and equipment in the form of entity sets.
According to fitting relation between the contract and equipment established described in step 3, on the basis of logistical balancing principle, It determines preferential fitting relation between contract and equipment, is by mapping continuous casting working procedure and hot-rolled process production logistics rapport It is realized for operation rules, operation rules is as follows：
Rule one：Straight line logistics if it exists, then select manufacturing process corresponding to straight line logistics for main processing procedure, remaining logistics is Secondary processing procedure.Multiple straight line logistics if it exists, selecting manufacturing process corresponding to the basic day maximum continuous casting installation for casting of production capacity is main processing procedure, Remaining logistics is secondary processing procedure；
Rule two：If it does not exist straight line logistics and there are multiple intersection logistics, select the basic day maximum continuous casting of production capacity to set Standby corresponding manufacturing process is main processing procedure, remaining logistics is secondary processing procedure；
Rule three：If it does not exist straight line logistics and there are multiple intersection logistics, select the basic day maximum hot rolling of production capacity to set Standby corresponding manufacturing process is main processing procedure, remaining logistics is secondary processing procedure；
Described regular one, the straight line logistics in rule two and rule three refers to that the Infrared measurement technique for hot-slabs after continuous casting installation for casting can The material stream that equipment of hot rolling heating furnace directly carries out following process is directly entered by roller-way；The intersection logistics refer to by Infrared measurement technique for hot-slabs after continuous casting installation for casting, need after offline cooling treatment using trolley be transported to equipment of hot rolling heating furnace carry out it is subsequent plus The material stream of work；In Fig. 2 continuous casting provided and the producing line of hot rolling layout, path 1 and path 2 are straight line logistics, path 3 and road Diameter 4 is to intersect logistics.
Step 4：Contract is produced for given full processing procedure, founding mathematical models quantify contract processing procedure select permeability Change description, the selection of setting, constraint condition including decision variable and the determination of objective function；
Decision variable described in step 4 includes：
(a) 0-1 decision variable x is setij；When contract i selects j-th of equipment of continuous casting working procedure as contract continuous casting working procedure master When processing procedure, xijValue is 1；Otherwise xijValue is 0；
(b) 0-1 decision variable y is setij；When contract i selects j-th of equipment of hot-rolled process as contract hot-rolled process master When processing procedure, yijValue is 1；Otherwise yijValue is 0；
Constraint condition described in step 4 includes：
(c) process constraint and contract and the main system of hot-rolled process equipment that contract and the main processing procedure of continuous casting working procedure equipment limit are established The process constraint of degree, respectively as shown in formula (6) and formula (7), i.e., restriction contract is only capable of selection Unique Device in continuous casting working procedure Main processing procedure, contract as the contract in the process are only capable of selecting Unique Device as the contract in the work in continuous casting hot-rolled process The main processing procedure of sequence；
(d) process constraint for establishing the limitation of continuous casting and hot rolling processing apparatus production capacity, as shown in formula (8)~(11), i.e., restriction connects The contract total amount that casting-hot-rolled process is processed on each device is close to its desired wt；It is being set beyond part and insufficient section In fixed error range；
Wherein,WithIt is the part that contract for processing work total amount exceeds with insufficient desired wt in continuous casting working procedure equipment respectively,WithIt is the part that contract for processing work total amount exceeds with insufficient desired wt in hot-rolled process equipment respectively；It is continuous casting working procedure Equipment desired wt accounts for the percentage of contract total weight,It is the percentage that hot-rolled process equipment desired wt accounts for contract total weight Than,It is to process client's contract total amount in continuous casting working procedure equipment to exceed and the insufficient desired wt part upper limit,It is hot-rolled process Client's contract total amount is processed in equipment to exceed and the insufficient desired wt part upper limit, qiIt is that contract requirements owe amount；
Objective function described in step 4 includes：
(e) it minimizes and intersects logistics contract total weight, be shown below；
(f) contract for processing work total amount and desired wt deviation in continuous casting working procedure and each equipment of hot-rolled process, such as following formula are minimized It is shown；
(g) linear weighted function is carried out to multiple objective functions expressed by formula (12) and formula (13), obtains final target letter Number, as shown in formula (14)；
Wherein, λ1、λ2、λ3∈ [0,1] indicates the weight coefficient of different target function, λ1+λ2+λ3=1.
Step 5：One kind is designed based on discrete codes/decoded Evolution of Population algorithm for mathematics described in solution procedure 4 Model, to obtain contract processing procedure optimizing decision scheme；
Discrete codes/the decoding is for constructing population at individual, a solution of the individual correspondence problem of population；
The individual Constructing Policy of discrete codes：If (L1+L2) dimensional vectorTable A solution for showing problem has following two regulations to vector S：
Regulation one：Vector dimension is determined by contract number, that is, meets formula (15)：
L1=| N |+| P |, L2=| N | (15)
Regulation two：Vector element value range is determined by continuous casting working procedure or hot-rolled process number of devices, that is, meets formula (16) (17)：
Discrete decoded individual Translation Strategy：Either element a in vector SlOr bmMathematical model described in corresponding step 4 becomes Measure xijOr yijThe line index i and column index j that value is 1, i.e.,：I=l,WhereinIt indicates to be not more than alMinimum it is whole Number；
Based on the basic framework that discrete codes/decoded Evolution of Population algorithm is using differential evolution algorithm described in step 5 It realizes, specific sub-step is as follows：
Step 5-1：Initialization algorithm parameter；Including algorithm maximum number of iterations maxIter, algorithm population scale NP, become Different coefficient F, selection coefficient CR, algorithm history preferably solve BestV, current iteration number iter=0；
Step 5-2：Initialization population；NP initial individuals are generated at random, according to discrete codes individual Constructing Policy, the Idx individual is represented asWherein Solution S is checked according to constraint formula (6) and formula (7) firstjFeasibility carries out specific aim to solution according to conflict reason if infeasible It repairs；Then individuals all in population are translated by correspondence problem solution according to the individual Translation Strategy of discrete decoding, and according to formula (14) the corresponding adaptive value of each individual is calculated, f (S is denoted asj)；The smallest individual of adaptive value is referred to as optimum individual, and adaptive value is BestV；
Step 5-3：Mutation operation is carried out to individual every in population and crossover operation, specific sub-step are as follows：
Step 5-3-1：In the set { S that individual is constituted1, S2..., SNPIn choose three be different from target individual SjAnd mutually Different individual Sr1, Sr2, Sr3, i.e. j ≠ r1 ≠ r2 ≠ r3；
Step 5-3-2：From one variation step factor F of equally distributed real number interval [j/NP, 1] stochastic productionj；
Step 5-3-3：By individual Sj, Sr1, Sr2, Sr3Calculus of differences is carried out, the individual V after obtaining mutation operationj, such as following formula It is shown；
Vj=Sr1+Fj(Sr2-Sr3) (18)
Step 5-3-4：It is each element stochastic production one of a volume matrix from equally distributed real number interval [j/NP, 1] A crossover probability factor CRl；
Step 5-3-5：By each pair of individual SjAnd VjCrossover operation is executed, is shown below, new individual U is producedj；
Wherein,Indicate UjInternal element,Indicate VjInternal element,Indicate SjInternal element, j=1, 2 ..., NP, l=1,2 ..., L1+L2,It indicates to obey random number between (0,1) being just distributed very much；
Step 5-3-6：Judge whether elementOrIf so, to new individual UjIt carries out at boundary condition Reason, is shown below, and otherwise, completes crossover operation；
Wherein, L indicates elementValue range lower limit, U indicate elementThe value range upper limit；
Step 5-4：Each new individual U is calculated according to formula (14)jAdaptive value, be denoted as f (Uj)；Compare f (Uj) and f (Sj), And individual is updated；To the individual collections { S of update1, S2..., SNPStep 5-3-1 to step 5-3-6 is repeated, Until meeting stop condition；
Step 5-5：In final individual collective { S1, S2..., SNPIn selection target functional value f (Sj) the smallest individual S*, call discrete decoded individual Translation Strategy to be decoded, obtain final contract processing procedure optimizing decision scheme.
Step 6：Contract processing procedure optimizing decision scheme is obtained according to step 5, executes contract major-minor processing procedure conversion process, and press Production is worked out a production plan and organized to the main processing procedure of contract after conversion；
The contract major-minor processing procedure conversion includes following sub-step：
Step 6-1：Determining that the problem of obtaining by step 5 solves corresponding processing procedure is contract uniquely main processing procedure；It sets in step 3 and obtains Remaining processing procedure obtained is secondary processing procedure；
Step 6-2：Owe contract each process to amount, each reservoir area storage is converted to main processing procedure.
A kind of setting of main processing procedure of iron and steel enterprise's contract proposed by the present invention and automatic switching method, by determining that client closes With the fitting relation between demand and unit parameter, the mathematical model of contract relations of distribution on unit is established, is guaranteeing technique Be to accurately calculate foundation with model under conditions of constraint, using the algorithm framework based on Evolution of Population strategy, and design it is a kind of from The chromosome for dissipating coding (decoding) enough makes the derivation algorithm of strategy, which is decoded with the system of each contract of determination Journey allocation plan, it is final to execute major-minor processing procedure conversion operation to realize the global optimization of contract processing procedure.Method proposed by the invention It balanced can make steel and reduce friendship the Productivity Allocation between the parallel unit of hot rolling, the feed relationship of coordination steel-making and hot-rolled process Logistics is pitched, utilization rate of equipment and installations is improved, reduces production and inventory cost.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used To modify to technical solution documented by previous embodiment, or some or all of the technical features are equal Replacement；And these are modified or replaceed, model defined by the claims in the present invention that it does not separate the essence of the corresponding technical solution It encloses.

Claims (6)

1. setting and the automatic switching method of a kind of main processing procedure of iron and steel enterprise's contract, it is characterised in that：This method includes following step Suddenly：
Step 1：Determine the technological parameter of continuous casting installation for casting and the technological parameter of equipment of hot rolling；
The technological parameter of the continuous casting installation for casting includes the topology layout of continuous casting installation for casting, the basic day production capacity of each continuous casting installation for casting, maintenance Information allows width range of casting, mould wall thickness, the width range for allowing to adjust；
The technological parameter of the equipment of hot rolling includes the topology layout of equipment of hot rolling, the basic day production capacity of each equipment of hot rolling, maintenance Information, the maximum rolling width of permission, the maximum rolling thickness of permission, maximum width survey pressure amount；
Step 2：Contract specification parameter is obtained, contract specification parameter includes contract first choice steel grade, contractual delivery phase, contractual delivery class Type, contract refining route, contract status, contract order width, contract order thickness, contract order weight, contract correspond to slab Nominal Width bound, nominal length bound, slab nominal thickness, slab rated weight bound；
The contractual delivery type, including by week delivery, monthly delivery, quarterly deliver goods；
Step 3：Determine the preferential fitting relation between contract and equipment：The technique of the continuous casting installation for casting according to determined by step 1 is joined Contract specification parameter acquired in number, the technological parameter of equipment of hot rolling and step 2, is established contract and is set in the form of entity sets Fitting relation between standby；According to fitting relation between the contract and equipment established, on the basis of logistical balancing principle, determine Preferential fitting relation between contract and equipment；
Step 4：Contract is produced for given full processing procedure, founding mathematical models carry out quantification to contract processing procedure select permeability and retouch It states, the selection of setting, constraint condition including decision variable and the determination of objective function；
Step 5：It designs one kind and mathematical model described in solution procedure 4 is used for based on discrete codes/decoded Evolution of Population algorithm, To obtain contract processing procedure optimizing decision scheme；
Discrete codes/the decoding is for constructing population at individual, a solution of the individual correspondence problem of population；
The individual Constructing Policy of discrete codes：If (L1+L2) dimensional vectorExpression is asked One solution of topic has following two regulations to vector S：
Regulation one：Vector dimension is determined by contract number, that is, meets formula (15)：
L1=| N |+| P |, L2=| N | (15)
Regulation two：Vector element value range determines by continuous casting working procedure or hot-rolled process number of devices, that is, meet formula (16) and (17)：
Discrete decoded individual Translation Strategy：Either element a in vector SlOr bmMathematical model variable x described in corresponding step 4ij Or yijThe line index i and column index j that value is 1, i.e.,：I=l,WhereinIt indicates to be not more than alSmallest positive integral；
Step 6：Contract processing procedure optimizing decision scheme is obtained according to step 5, executes contract major-minor processing procedure conversion process, and by conversion Production is worked out a production plan and organized to the main processing procedure of contract afterwards；
The contract major-minor processing procedure conversion includes following sub-step：
Step 6-1：Determining that the problem of obtaining by step 5 solves corresponding processing procedure is contract uniquely main processing procedure；It sets and obtains in step 3 Remaining processing procedure is secondary processing procedure；
Step 6-2：Owe contract each process to amount, each reservoir area storage is converted to main processing procedure.
2. setting and the automatic switching method of the main processing procedure of iron and steel enterprise's contract according to claim 1, it is characterised in that：Institute State determined in step 2 contract first choice steel grade be by comparing the expected content of contract main chemical elements and its in all steel grade contents Difference choose, that is, contract i main chemical elements expectation content calculated by formula (1) and it contains in any steel grade g Measure difference and Δig, then specify ΔigIt is worth the preferred steel grade that the smallest steel grade is contract i；
Wherein,WithIt is the bound requirement of chemical element e included in steel grade g；reiExpression contract i included The expectation content of chemical element e, EiThe chemical element set that expression contract i need to be chemically examined.
3. setting and the automatic switching method of the main processing procedure of iron and steel enterprise's contract according to claim 1, it is characterised in that：Institute It states and establishes fitting relation between contract and equipment in step 3 in the form of entity sets, be by producing continuous casting and hot rolling process What the method that the technique limitation of process is described as mathematical model constraint condition was realized, specifically comprise the following steps：
Step 3-1：The process constraint for establishing equipment Yu contract set relation respectively, as shown in formula (2) and (3), i.e.,：Given continuous casting J-th of equipment of process is determined to the contract set processed on the deviceGiven j-th of equipment of hot-rolled process, determines energy Enough contract set processed on the device
Wherein, N and P respectively indicates the contract set by continuous casting and hot rolling process and the contract set merely through hot-rolled process, Ω1、Ω2Respectively indicate the cluster tool of continuous casting working procedure and the cluster tool of hot-rolled process, wiAnd hiIt is corresponding to respectively indicate contract i The Nominal Width and nominal thickness of slab；Respectively indicate the rolling width upper limit of j-th of equipment of continuous casting working procedure And lower limit,The rolling width upper and lower bound of j-th of equipment of hot-rolled process is respectively indicated,Respectively Indicate the rolling thickness of j-th continuous casting working procedure, hot-rolled process of equipment, djIndicate the maximum width side of j-th of equipment of hot-rolled process Pressure amount；
Step 3-2：The process constraint for establishing contract Yu cluster tool relationship respectively, as shown in formula (4) and (5), i.e.,：Given contract I determines it in continuous casting working procedure optional equipment setWith hot-rolled process optional equipment set
So far it completes and establishes fitting relation between contract and equipment in the form of entity sets.
4. setting and the automatic switching method of the main processing procedure of iron and steel enterprise's contract according to claim 3, it is characterised in that：Institute It states according to fitting relation between the contract and equipment established described in step 3, on the basis of logistical balancing principle, determines and close It is by the way that continuous casting working procedure and hot-rolled process production logistics rapport to be mapped as operating with fitting relation preferential between equipment What rule was realized, operation rules is as follows：
Rule one：Straight line logistics if it exists then selects manufacturing process corresponding to straight line logistics for main processing procedure, remaining logistics is secondary system Journey；Multiple straight line logistics if it exists, selecting manufacturing process corresponding to the basic day maximum continuous casting installation for casting of production capacity is main processing procedure, remaining Logistics is secondary processing procedure；
Rule two：If it does not exist straight line logistics and there are multiple intersection logistics, select the maximum continuous casting installation for casting institute of basic day production capacity Corresponding manufacturing process is main processing procedure, remaining logistics is secondary processing procedure；
Rule three：If it does not exist straight line logistics and there are multiple intersection logistics, select the maximum equipment of hot rolling institute of basic day production capacity Corresponding manufacturing process is main processing procedure, remaining logistics is secondary processing procedure；
Described regular one, the straight line logistics in rule two and rule three refers to that the Infrared measurement technique for hot-slabs after continuous casting installation for casting can pass through Roller-way is directly entered the material stream that equipment of hot rolling heating furnace directly carries out following process；The intersection logistics refers to by continuous casting Infrared measurement technique for hot-slabs after equipment, needs to be transported to equipment of hot rolling heating furnace using trolley after offline cooling treatment and carries out following process Material stream.
5. setting and the automatic switching method of the main processing procedure of iron and steel enterprise's contract according to claim 4, it is characterised in that：Institute The setting for stating the decision variable in step 4 includes：
(a) 0-1 decision variable x is setij；When contract i selects j-th of equipment of continuous casting working procedure as the main processing procedure of contract continuous casting working procedure When, xijValue is 1；Otherwise xijValue is 0；
(b) 0-1 decision variable y is setij；When contract i selects j-th of equipment of hot-rolled process as the main processing procedure of contract hot-rolled process When, yijValue is 1；Otherwise yijValue is 0；
Constraint condition in the step 4 includes：
(c) process constraint and contract for establishing contract and the main processing procedure limitation of continuous casting working procedure equipment are limited with the main processing procedure of hot-rolled process equipment The process constraint of system, respectively as shown in formula (6) and formula (7), i.e., restriction contract continuous casting working procedure be only capable of selecting Unique Device as The contract is only capable of selecting Unique Device as the contract in the process in continuous casting hot-rolled process in main processing procedure, the contract of the process Main processing procedure；
(d) process constraint for establishing the limitation of continuous casting and hot rolling processing apparatus production capacity limits continuous casting-as shown in formula (8)~(11) The contract total amount that hot-rolled process is processed on each device is close to its desired wt；Beyond part and insufficient section in setting In error range；
Wherein,WithIt is the part that contract for processing work total amount exceeds with insufficient desired wt in continuous casting working procedure equipment respectively, WithIt is the part that contract for processing work total amount exceeds with insufficient desired wt in hot-rolled process equipment respectively；It is that continuous casting working procedure is set Standby desired wt accounts for the percentage of contract total weight,It is the percentage that hot-rolled process equipment desired wt accounts for contract total weight,It is to process client's contract total amount in continuous casting working procedure equipment to exceed and the insufficient desired wt part upper limit,It is that hot-rolled process is set Standby upper processing client contract total amount exceeds and the insufficient desired wt part upper limit, qiIt is that contract requirements owe amount；
Objective function in the step 4 includes：
(e) it minimizes and intersects logistics contract total weight, be shown below；
(f) contract for processing work total amount and desired wt deviation in continuous casting working procedure and each equipment of hot-rolled process are minimized, is shown below；
(g) linear weighted function is carried out to multiple objective functions expressed by formula (12) and formula (13), obtains final objective function, such as Shown in formula (14)；
Wherein, λ1、λ2、λ3∈ [0,1] indicates the weight coefficient of different target function, λ1+λ2+λ3=1.
6. setting and the automatic switching method of the main processing procedure of iron and steel enterprise's contract according to claim 4, it is characterised in that：Institute Stating in step 5 based on discrete codes/decoded Evolution of Population algorithm is realized using the basic framework of differential evolution algorithm, tool Body sub-step is as follows：
Step 5-1：Initialization algorithm parameter；Including algorithm maximum number of iterations maxIter, algorithm population scale NP, variation lines Number F, selection coefficient CR, algorithm history preferably solve BestV, current iteration number iter=0；
Step 5-2：Initialization population；NP initial individuals are generated at random, and according to discrete codes individual Constructing Policy, the i-th dx is a Individual is represented asWhereinIt is first Solution S is first checked according to constraint formula (6) and formula (7)jFeasibility carries out specific aim to solution according to conflict reason and repairs if infeasible It is multiple；Then individuals all in population are translated by correspondence problem solution according to the individual Translation Strategy of discrete decoding, and according to formula (14) the corresponding adaptive value of each individual is calculated, f (S is denoted asj)；The smallest individual of adaptive value is referred to as optimum individual, and adaptive value is BestV；
Step 5-3：Mutation operation is carried out to individual every in population and crossover operation, specific sub-step are as follows：
Step 5-3-1：In the set { S that individual is constituted1, S2..., SNPIn choose three be different from target individual SjAnd mutual not phase Same individual Sr1, Sr2, Sr3, i.e. j ≠ r1 ≠ r2 ≠ r3；
Step 5-3-2：From one variation step factor F of equally distributed real number interval [j/NP, 1] stochastic productionj；
Step 5-3-3：By individual Sj, Sr1, Sr2, Sr3Calculus of differences is carried out, the individual V after obtaining mutation operationj, such as following formula institute Show；
Vj=Sr1+Fj(Sr2-Sr3) (18)
Step 5-3-4：From each element stochastic production one friendship that equally distributed real number interval [j/NP, 1] is a volume matrix Pitch probability factor CRl；
Step 5-3-5：By each pair of individual SjAnd VjCrossover operation is executed, is shown below, new individual U is producedj；
Wherein,Indicate UjInternal element,Indicate VjInternal element,Indicate SjInternal element, j=1,2 ..., NP, l=1,2 ..., L1+L2,It indicates to obey random number between (0,1) being just distributed very much；
Step 5-3-6：Judge whether elementOrIf so, to new individual UjBoundary condition treatment is carried out, such as Shown in following formula, otherwise, crossover operation is completed；
Wherein, L indicates elementValue range lower limit, U indicate elementThe value range upper limit；
Step 5-4：Each new individual U is calculated according to formula (14)jAdaptive value, be denoted as f (Uj)；Compare f (Uj) and f (Sj), and it is right Individual is updated；To the individual collections { S of update1, S2..., SNPStep 5-3-1 to step 5-3-6 is repeated, until Meet stop condition；
Step 5-5：In final individual collective { S1, S2..., SNPIn selection target functional value f (Sj) the smallest individual S*, adjust It is decoded with discrete decoded individual Translation Strategy, obtains final contract processing procedure optimizing decision scheme.
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