Conveners
Rolling Mill Technology & Process Optimization
- Ettore Anelli (Franchini Acciai SpA)
Rolling Mill Technology & Process Optimization
- alessandro ferraiuolo (Marcegaglia Ravenna)
Rolling Mill Technology & Process Optimization
- Silvia Barella (Politecnico di Milano)
Rolling Mill Technology & Process Optimization
- There are no conveners in this block
Description
3.1.1
This paper presents an optimization study of a hot strip mill first finishing stand (F1) top work roll cooling system, which was done in cooperation between Danieli (Buttrio, Italy) and Heat Transfer and Fluid Flow Laboratory (BUT Brno, Czech Republic). The target of the study was to decrease water consumption by more than 25% on the top work roll, maintaining the same (or better) cooling...
All demanding modern applications such as structural, energy and automotive, require steels with an increasingly high level of strength and ductility whilst retaining good cost competitiveness as well as fulfilling ever demanding emission levels. Structural steels have traditionally focused on obtaining strength via C and Mn with some mini-mill producers utilising V micro-alloying to achieve...
Abstract
The hot rolling mill power requirement depends on several factors, including the material's properties, strain and strain rate schedule, rolling temperature, microstructure evolution and roll-workpiece friction condition. On the other side, the thermomechanical process relies on precisely controlled softening and hardening phenomena to achieve the desired microstructure and tensile...
Hot-rolled long products such as beams, bars, and rails are curved after cooling. Roller straightening aligns these curved long products by passing them between staggered rollers, inducing controlled, repeated elastic-plastic bending. SMS group technology for roller straightening machines is the CRS® Compact Roller Straightener, typically characterized by nine, individually driven...
The Hot Strip Mill # 2 of Erdemir started operation in 1978. Since the startup, two major revamps were conducted in 1995 and 2007.
Potential for further optimizations was expected in the roll cooling header design comprising a wide range of different nozzle types including very small nozzles, which are prone to clogging. As a result, the strip thickness across the width was affected and the...
A frequent source of yield losses, especially for reversing cold mills, are the unrolled head and tail ends of the strip. The conventional threading method without reduction at the strip head end results in a considerable loss of yield of 1.5 to 3 percent or more of the overall production of the plant.
At the same time, preparation and threading of the strip head-end are time-consuming and...
An enhanced strip production concept with Danieli Inductive Heating technology ensuring conventional Hot Strip Mill answers market demand for ultra-thin gauge, high quality and premium grades.
Thick-slab rolling using conventional Hot Strip Mill holds the leading position when it comes to high production capacity, wide and flexible product mix, and premium grades such as automotive exposed...
The latest developments in MIDA (MInimill DAnieli) endless casting and rolling technology represent a significant advancement in the steel manufacturing industry. This innovative process integrates melting, continuous casting and rolling into a single, uninterrupted production line, eliminating the need for intermediate cutting, storage and reheating of the billets, significantly reducing...
Multi-pass hot caliber rolling technology has significant advantages in producing continuous bars, which can be used as structural and connecting parts with essential applications. The efficient production of high-quality bars is of great importance. Simulation is an important tool for reproducing production processes. With the improvement of product quality requirements, people also put...
CSP® Nexus is setting the stage for a new generation of direct casting and rolling plants with its latest orders. Unlocked by its high-throughput casting and "real batch" rolling capability, this technology achieves the lowest energy and conversion costs by efficiently utilizing available casting heat through decoupled high-speed rolling in both roughing and finishing stages. Notably, CSP®...
Hot strip mills can have a service life of 50 years and more. An ongoing challenge for plant owners is to maintain the competitiveness of their plants over the entire life cycle with constantly new boundary conditions and developments. SMS group offers advanced and innovative technical solutions enhancing the product portfolio, product quality, operational efficiency, sustainability and...
In the field of Special Bar Quality (SBQ) production, decades of evidence indicate that a sizing block makes a decisive difference in the total performance of each rolling mill. This is valid for green field projects as well as for modernization projects. The so-called 'sizing block' reflects a significant advancement - traditionally aimed at substantially enhancing product quality in...
The demand for increased productivity, cost efficiency and reduce energy and environment impact in the steel rolling industry has driven the adoption of innovative technologies.
Triple slitting technology is a game-changing method in rolling processes, particularly for rebar sizes over 14 mm.
So, the intention of this paper is to explore the implementation of triple slitting technology...
In the hot strip rolling process, the reheating furnace heats the slab to a suitable temperature for rolling. The roughing mill then processes the slab, extracted from the reheating furnace, into a bar, and the finishing mill ultimately produces strips of the desired size as requested by the customer. In the cooling section, the material is processed to satisfy the customer’s required...
Arvedi ESP (Endless Steel Production) has transformed the steel industry by integrating continuous casting and direct hot rolling into an ultra-compact process. This innovation has introduced the endless Hot Rolled Coil (eHRC) as a new market product with unprecedented geometrical tolerances and mechanical uniformity. However, ESP production follows casting sequences, which are interrupted...
Recent trends in plate steel production have seen a focus on maximizing mill productivity. Plates that are produced using a controlled rolling strategy usually have a pause in the rolling sequence. This hold time can be extended based on the process parameters and can significantly contribute to the overall production time for a single plate and reduce mill productivity. The application of...
An RFCS funded project, SmartCool (RFCS-PDR 101057274) has been launched together with major European steel producers and research centres. The aim of this project is to develop a selective transfer bar cooling that is intelligently controlled to correct in real time transfer bar temperature distortions during production. A step by step approach has been initiated at the design phase and...
In the hot rolling process, precise control of dimensional accuracy and material properties in steel plates is essential for performance and cost efficiency. However, increasing customer demands have underscored the importance of surface quality. A key determinant of surface quality is the Roughing-mill Delivery Temperature (RDT), which significantly influences scale formation and surface...
Although the production of ERW (electric resistance welded) square and rectangular sections is well-established, certain applications require seamless square and rectangular hollow sections due to their superior properties. These products' limited demand capacities make the market closely linked to downstream value chains, where their availability is crucial, as ERW tubes have neither been...
The latest trends in the premium automotive steel bar market focus on meeting the highest quality standards demanded by end users. Achieving these targets relies heavily on advanced heat treating technologies, which are crucial for attaining the desired metallurgical and mechanical properties. These new technologies must also contribute to reducing fuel consumption and emissions.
The new...
The eDrive Mini-Finishing Mill by Primetals Technologies offers significant advantages for bar-in-coil and wire rod mills, including reduced CAPEX and OPEX, lower power and water consumption, and enhanced operational flexibility with quick product size changes. Its low-voltage system, virtual gear box, and reduced maintenance needs improve efficiency. Compared to other technologies on the...