continuous casting scheduling with constraint
Constraint-based approach for steelmaking-continuous
Steelmaking-continuous casting production scheduling is an NP-hard problem. In this paper a constraint-based approach is presented to solve steelmaking-continuous casting production scheduling problem in integrated steel production environment. We treat the steelmaking-continuous casting scheduling problem as a constraint satisfaction problem. The optimization objective is to
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Production scheduling in a steelmaking-continuous casting
The steel-making continuous casting scheduling problem holds more constraints than flow shop in no-idle machine constraint multiple buffers and batch scheduling resulting in strong NP-hardness.
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Production Scheduling of a Large-Scale Steelmaking
The scheduling of steelmaking continuous-casting (SCC) processes is of major importance in iron and steel operations since it is often a bottleneck in iron and steel production. Optimal scheduling of SCC processes can increase profit minimize production cost reduce material and energy consumption and improve customer satisfaction. Scheduling of SCC processes is challenging because of its
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Energy-efficient steelmaking-continuous casting scheduling
Oct 01 2020 · Optimizing the steelmaking and continuous casting production scheduling with temperature constraints on the basis of existing equipment and process technology is conducive to the stable and efficient operation of production which will lead to energy-efficient steel manufacturing.
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An Efficient Augmented Lagrange Multiplier Method for
Apr 01 2021 · Constraint (6) is a continuous casting constraint stating that adjacent charges belonging to the same cast must be processed consecutively without any interruption at the last stage. 3.4. Integrality constraints and variable bounds (7) 0 ≤ C s j j ≤ H ∀ j ∈ J s j ∈ S j (8) x s j j t ∈ 0 1 ∀ j ∈ J s j ∈ S j t ∈ T. 3.5
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Article Pre-PrintMcMaster University
(3) Continuous casting utilization is maximized (i.e. the residual capacity at the continuous casting stage is minimized) (4) Production constraints and inventory capacities at the downstream production stage are satisfied. At the same time scheduling of SCC must take into account the performance of the
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(PDF) A novel hybrid algorithm for scheduling steel-making
Ferretti et al. 8 presented the algorithmic solution based cal constraints and its more complex scheduling criteria. Gupta 1 on ant system metaheuristic for an industrial production inventory demonstrated that the two-stage HFS scheduling problem with the problem in a steel continuous casting
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Continuous Casting Scheduling with Constraint Programming
This translates into additional constraints for the scheduling a program is a set of heats that will be used for the continuous casting of one object. The heats of a program have thus to be treated consecutively at the caster (without any gap between corresponding activities).
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Constraint-Based Approach for Steelmaking–Continuous
Jun 26 2007 · Steelmaking-continuous casting rescheduling problem is an NP-hard problem. In this paper we present a constraint-based approach for steelmaking–continuous casting rescheduling problem in integrated steel production environment. We treat the steelmaking–continuous casting rescheduling problem as a dynamic constraint satisfaction problem.
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Energy-efficient steelmaking-continuous casting scheduling
Therefore the energy-efficient steelmaking-continuous casting scheduling problem with temperature constraints (EESCCSPT) was concerned and a multi-objective mathematical programming model was introduced to minimize the penalty of due date deviation and the extra energy consumption measured by temperature drop.
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Scheduling Multi-Stage Batch Production Systems with
Scheduling Multi-Stage Batch Production Systems with Continuity ConstraintsThe Steelmaking and Continuous Casting System The SCC System (steel making and continuous casting system) is usually the bottleneck in steel manufacturing. Unlike traditionally production systems
Get PriceCrane Scheduling of Steel-Making and Continuous Casting
continuous casting is sent to the steel ladle platform by the cranes and is put into the trolley and then the ladle is in the process of drossing. After the process the ladle will be sent Fig. 2 The scheduling system of SCC Ladle Constraints for refining process For
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Continuous Casting Scheduling with Constraint Programming
Continuous Casting Scheduling with Constraint Programming . By Steven Gay Pierre Schaus and Vivian De Smedt. Abstract. Abstract. Although the Steel Mill Slab problem (prob 38 of CSPLib) has already been studied by the CP community this approach is unfor-tunately not used anymore by steel producers since last century. Contin-uous casting is
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CiteSeerX — Continuous Casting Scheduling with Constraint
Contin-uous casting is preferred instead allowing higher throughput and better steel quality. This paper presents a CP model related to scheduling of op-erations for steel making with continuous casting. Activities considered range from the extraction of iron in the furnace to its casting in con-tinuous
Get Price(PDF) Scheduling continuous aluminium casting lines
Then the casting-scheduling problem with sequence-dependent setups and load-balancing constraints (CSP-SDS-LBC) can be formulated as min Ctotal X ð1Þ Ctotal ¼ Ck k2K n X XX Ck ¼ yik pik þ xijk sijk k2K ð2Þ i¼1 i2Jk j2jk Downloaded By Yildirim mehmet At 18 04 22 September 2008 1 Ck Ctotal ð1 þ Þ k 2 K ð3Þ jKj 1 Ck Ctotal ð1
Get PriceScheduling Model for the Practical Steelmaking-continuous
However considering the requirement of casting continuously and the quality of molten steel in whole process the scheduling in SMCC is more complicated than that in common HFSP. Before modeling the critical step is to generalize the scheduling rules so as to identify the correct objectives and constraints.
Get PriceSteel-making process scheduling using Lagrangian
The steel-making process including steel-making and continuous casting is usually the bottleneck in iron and steel production. Effective scheduling of this process is thus critical to improve productivity of the entire production system. Unlike the production scheduling in the machinery industry steel-making process scheduling is characterized by the following features job grouping and
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Continuous Casting Scheduling with Constraint Programming
Continuous Casting Scheduling with Constraint Programming
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Production Scheduling Optimization Algorithm for the Steel
Continuous Casting Production Scheduling Branch and Bound Algorithm Introduction Production scheduling one of the most challenging problems in the steel industry is a key component for productivity in manufacturing. It has been distinguished as one of the most challengeable and complicated problems for manufacturers.
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An Improved Self-adaptive Genetic Algorithm for Scheduling
Oct 13 2015 · The steel-making continuous casting scheduling problem holds more constraints than flow shop in no-idle machine constraint multiple buffers and batch scheduling resulting in strong NP-hardness. Its mathematical programming model is first established based on unit-specific event-point continuous-time representation.
Get PriceOptimization of Steel Production Scheduling with Complex
models. Tang et al. (2001) gives an overview of planning and scheduling systems for integrated steel plants including Artificial Intelligence Expert Systems intelligent search and Constraint Programing methods. In Li et al. (2012) the focus was on the last continuous -casting stage where particular
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RESCHEDULING OPTIMIZATION OF STEELMAKING
The scheduling of steelmaking-continuous casting (SCC) process is a hybrid ow job shop problem. There are three major processing stages which constraints such as machine capacity constraints or cast-break constraints by using Lagrangian multipliers 18 .
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RESCHEDULING OPTIMIZATION OF STEELMAKING
The scheduling of steelmaking-continuous casting (SCC) process is a hybrid ow job shop problem. There are three major processing stages which constraints such as machine capacity constraints or cast-break constraints by using Lagrangian multipliers 18 .
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A Manualized Approach to Implementing Constraint Induced
Flexibility in scheduling is based on the child s needs Dosage Continuous casting Intermittent constraint removable constraint Considerations age of child frustration tolerance needs of the child ability for therapist to create a just right challenge Continuous vs Intermittent . Consider -Age of the child
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Model and Solution for Steelmaking-Continuous Casting
In this paper we present a constraint satisfaction model for the steelmaking-continuous casting scheduling problem solved by constraint programming methods. The problem is described with parallel machines in each processing stage and the capacity of each machine is limited and then there are different constraints in the problem such as process routing constraint temporal constraint and so
Get PriceContinuous Casting Scheduling with Constraint Programming
Continuous Casting Scheduling with Constraint Programming
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Article Pre-PrintMcMaster University
(3) Continuous casting utilization is maximized (i.e. the residual capacity at the continuous casting stage is minimized) (4) Production constraints and inventory capacities at the downstream production stage are satisfied. At the same time scheduling of SCC must take into account the performance of the
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Scheduling of steelmaking-continuous casting process using
Feb 01 2020 · Constraint (10) expresses that a enough setup time is considered between two adjacent casts for changing equipments on the same continuous casting machine. Constraints (11) (12) limit the value range of the decision variables.
Get PriceA scheduling system for the steelmaking—Continuous casting
The heuristic algorithm consists of three planning levels (1) scheduling the continuous casters considering the capacity restrictions at the upstream stages and the limited availability of hot
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