Strip Steering Control — A Cutting-Edge Technology for Hot Strip Mills Stability of the hot strip mill roll-ing process remains a main topic when it comes to processing thin and hard materials. Strip steering, especially at the end of rolling and tail-out rips, is a main source of unscheduled downtimes in a hot strip mill (HSM). The main focus of
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Hot Strip Mill Cost Savings: $165,088. A large steel manufacturer wanted to increase replacement intervals of Four-Row Tapered Roller Bearings used in the hot strip mill. Due to severe operating conditions, standard bearings provided only 1,400 hours of operation. The key target was to decrease spend on bearing replacement and maintenance.
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Work rolls in the hot strip mill withstand extreme service conditions, especially when electrical steels are rolled, resulting in severe roll wear and fatigue. High-speed steel (HSS) work rolls and rolling lubrication are applied to the mill to improve roll wear and fatigue. Tests show that HSS work rolls manifest good performance in wear, …
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and Cost Reduction in Hot Strip Mill Applica tions. Pello Uranga 1, Jose Rodriguez-Ibabe 1, Douglas G. Stalheim 2, Ronaldo Barbosa 3, Marcelo Rebellato 4. 1 CEIT and Te cnun (Univer sity of Navarra)
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Backup rolls of hot rolling mills have long service life, can withstand harsh working conditions during rolling. However, they undergo severe roll wear that affects the contact force between rolls, resulting in roll fatigue and even spalling accidents. In this study, a fatigue-damage prediction model of a backup roll considering roll wear is …
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Fig. 1 shows the configuration of a 7-stand hot strip mill set up at Algoma Steel. The rolling mill is equipped with a slab reheat furnace, followed by an edger for width control before a single roughing mill stand. The pre-deformed strip is then de-scaled and is transported into 6 stands of 4-high rolling mill for stepwise thickness reduction ...
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Hot strip rolling is a rolling technology of hot rolling billets to obtain strip or thin (medium) plate, also known as hot strip rolling. There are two main ways of hot …
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In this article, we focus on a biobjective hot strip mill (HSM) scheduling problem arising in the steel industry. Besides the conventional objective regarding penalty costs, we have also considered minimizing the total starting times of rolling operations in order to reduce the energy consumption for slab reheating.
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Houses India's widest hot strip mill and one of India's largest blast furnaces Produces 800-plus tonnes per person per annum, making it the most productive steel plant in India Recognised for its 'zero-effluent discharge' status; reuses more than …
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HOT STRIP MILLS NEW INSTALLATIONS NEW HOT STRIP MILLS REFERENCES Primetals Technologies supplied seventeen (17) new conventional hot strip mills in the last 15 years. This number of mills corresponds to a yearly production of hot rolled coils of approximately 55 million tons. The table on the next page gives an overview of these …
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The Hot Strip Mill of Çolakoğlu Metalurji was commissioned in 2010. The mill consists mainly of a single-stand reversing roughing mill with an edger, a coil box, and a 7-stand finishing mill (see Fig. 1).Multiple steel grades ranging from HSLA, ultra low carbon and API to conventional steel grades within a thickness range of 1.2–25.4 mm …
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Running a hot strip production facility these days places high demands on the future viability of the equipment. Our hot rolling mills are capable of producing flat steel from thin gauges of 1.2 mm to high-strength steels up to 25.4 mm thick, including stainless steel.
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"Installation of a three mtpa new Hot Strip Mill at an estimated capital cost of Rs 4,360 crore has been accorded in-principle approval by the Board on September 20, 2013," the source told PTI. SAIL would start the tendering process for the proposed mill shortly and plans to install it within 35 months from the date of signing of the contract.
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The yield and economy during hot strip rolling depend on developing high capacity components fulfilling further the increasing customers' demands for cost and resource effective production figures. The paper gives an overview of the latest developments for high capacity components and tools of the SMS group for …
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Strip After Cooling: Temperature 1000 –1300ºF Making, Shaping and Treating of Steel: 101 Mill Configuration DOWNCOILERS WINDING: Strip is over 4,000 ft. in length. The downcoilers wrap strip into a coiled hot band. WINDING INTEGRITY: Laps should be wound onto themselves. Coiled hot band should be free of telping and sidewall …
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The cost of setting up a steel mill is enormous. For example, a Gary, Indiana, hot-strip mill would cost an estimated $1.5 billion to build. Using this information and the cost concepts from chapters 11 and 12, explain the following quotation: "To make operations even marginally profitable, big steelmakers must run full-out.
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There is a holddown roll on the entry side of the pinch roll unit to prevent the strip (especially heavy-gage strip) from bulging ahead of the pinch rolls. Customers demand …
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The X-Roll® hot strip mill from SMS group is an all-round talent in hot strip production. It is the proper solution for ultra-thin gauges up to thick gauges for all steel grades incl. LC, ULC, high strength grades, API grades.
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Straight after that, the CSP ® mill rolls them to final strip thickness. Starting with a single-strand CSP ® plant, you can cost-effectively produce around 1.5 million tons hot strip per year. Later, add a second casting strand …
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STRIP COOLING: Cools strip to appropriate temperature for coiling via application of water to top and bottom surfaces. TOP SURFACE COOLING: Laminar water curtains, slotted …
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Hot rolling in the strip mill welds the pores left by the casting process, creating a denser, stronger metal. It also transforms brittle metal into a more ductile form that allows for a …
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Stringent market demands on cost and quality of the rolled products put proportional thrust on HSM to improve its performance. It is therefore required to explore measures for improving techno-economic parameters of the mill. ... Turk R, Fazfar P, Robic R, Perus I (2002) Prediction of hot strip mill roll wear. Metalurgija 41(1):47–51. ISSN ...
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Semi Continuous Hot Strip Mill which incorporates the latest proven technology and know-how available in the steel industry. Our experienced team of engineers and design has offered modern solutions that perfectly match the demands of the market. ... On the basis of this and with a low initial investment joint to reduce transformation cost, it ...
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Key words : hot strip mill; load distribution; multi-objective optimization Load distribution is critical for the hot rolling process, which not only directly affects product quality such as strip thickness and shape precision, but also has a major impact on rolling energy, roll consump tion, production stability and efficiency, etc1-1-1. ...
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The table above shows the format of the cost model that estimates hot rolled coil conversion costs from carbon steel slab, on a traditional continuous hot strip mill [not a reversing mill]. The rolling mill product is assumed to be steel coil of standard width (typically ~1.8m wide) and of ~1-3mm gauge.
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• Capital and installation costs more than 90 percent lower than reheat furnaces • Strength and ductility of the final product increased compared to conventional heating processes ... In a typical hot strip mill, steel slabs are overheated to ensure that edges remain hot enough for final processing. Once a slab has "dropped out" of a reheat
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Hot rolling. This process stretches a slab into a strip. The slab is reheated to approximately 1250°C and rolled in hot conditions. The resultant strip steel is wound into a roll like toilet paper (hot coil). Chains for lifting; …
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NSK Industries - Hot Strip Mill: A large manufacturer of steel wanted to increase replacement intervals for 4-row Tapered Roller Bearings used in the hot strip mill. ... Engineering Costs: Additional maintenance costs compared to NSK solution: € 10.000: Engineering Costs: Reduced maintenance time and no additional costs: € 0: Total …
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Hot strip mills in these days are either conventional hot strip mills or strip mills for rolling thin slabs. The primary function of the conventional hot strip mill (HSM) is to reheat the semi-finished steel …
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In this article, we focus on a biobjective hot strip mill (HSM) scheduling problem arising in the steel industry. Besides the conventional objective regarding penalty costs, we have also considered minimizing the total starting times of rolling operations in order to reduce the energy consumption for slab reheating. The problem is complicated by the inevitable …
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Capital Investment Costs - hot strip mill. Typical capex investment costs. Bar rolling mill investment cost summary. Parameter: Value: Average capacity: 2930 kt: Average cost 2018: US $ 506 million: Average cost per tonne capacity: US …
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oxide which is inherent during the hot-rolling process. Size Availability Thickness** 0.075" - 0.625" 1.9mm - 15.9mm Max Width** 72.5" 1842 mm ** Product width is a function of grade and thickness — maximum width is not available across the full hot rolled product gauge range ** Please inquire about products outside of these limits
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The slab is rolled into hot strip (thickness ranging from 0.8 mm to around 16 mm and width ranging from 800 mm to 1880 mm) as it passes through the finishing mill of 5, 6 or even 7 stands. The hot strip after rolling enters the run out table (ROT) where it undergoes laminar cooling to the coiling temperature. It is then coiled to room temperature.
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It is obvious that the main advantage of lean and short structured mini mill is lower investment cost compared with a conventional hot strip mill. The temperature homogeneity of this process is considered a key factor in the production of ultrathin gauge ( Astier, 1998 ; LeDuc Lezama & Muñoz Baca, 1998 ; Borsi & Rotti, 1998 ; Minami et al ...
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Fig 1 Typical layout of a hot strip mill. ... and (vi) low production costs. In the finishing mill of HSM, an important task is performed by a hydraulic arm, called the looper, placed in the middle between the two consecutive stands and whose purpose is to keep the strip tension at a constant value. This mechanical system is subject to ...
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within this thesis are specifically developed for ArcelorMittal Dofasco's Hot Strip Mill in Hamilton, Ontario, Canada. First, a graph theoretic representation of the production block is ... 4.1 3 Slab Example Asymmetric Cost Matrix 66 4.2 3 Slab Example PB Converted to Symmetric Cost Matrix 67 4.3 Execution Times for the Concorde Solver on ...
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Steckel Mills, thanks to low capital investment costs, occupy a special niche in hot flat rolling. They operate at a lower economic volume than hot strip mills but are capable of greater widths and are especially suitable for niche products and stainless steels.
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Hot Rolling Mill The slabs cool outside before being reheated in the reheat furnace. The slab (210 mm thick and weighing over 10 tonnes) is then transferred into the reversing rougher mill and is reduced in thickness with each pass. The steel is rolled down to about 25 mm when it is coiled in the coil box (to retain heat). It then passes ...
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