John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014 2.7 Generation III – Coil Box Hot Strip Mills. In the 1970s, Stelco of Canada developed the hot coil box designed for installation in hot strip mills ahead of the finish mill for coiling the transfer bar from the roughing mill and uncoiling it into the finishing mill. The coil box reduced the distance between the roughing mill ...
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2. The Evolution of Microstructure in the Hot Rolling Process The layout of the hot strip mill of voestalpine Stahl GmbH is shown in Fig. 1. Slabs are heated to rolling temperature in the reheating furnace, subsequently descaled and rolled in the roughing stand to the transfer bar thickness and - after a second descaling step -
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This paper is concerned with the development of a control system for tracking of a desired temperature-time profile for accelerated cooling processes in hot rolling of steel. Control of temperature during cooling is essential for achieving desired mechanical and metallurgical properties of steel. The cooling process is represented by the heat equation in Lagrangian …
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Critical to the Hot Strip Mill is its walking-beam reheat furnace, state-of-the art equipment that replaced and now outperforms three older- (pusher-) style furnaces. Nominally rated to produce 270 tons-per-hour, improvements in efficiency and some sacrifice in slab temperature uniformity enable extended production rates 25% above design.
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However, the hot strip steel mill is universally considered one of the harshest environments for process instrumentation and sensors but as the material speed and temperature increases, so does the importance of the measurement values.
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Monitoring of a strip roller path; Walking beam furnaces; Hot rolling of metal; Temperature measurement of cast steel; Pilger mill in tube rolling mills; Applications; Company. Team; Career; Proxitron worldwide; How to reach us; Information. Exhibitions; Press. Elektronik Praxis Ausgabe 6/2018; Produktion Nr. 10 / 2.5.2018; next-mobility.news ...
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2. Strip Cooling at Run-out Table of Hot Strip Mill On a hot strip mill line, steel slabs are heated to approximately 1 200°C in reheating furnaces and rolled into thin strips of pre-Temperature Measurement Technology in Water Cooling Process and High Accuracy Cooling Control Technology for High Tensile Hot Rolled Strip
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In the production and control of hot-rolled strip, the prediction accuracy of the finish rolling inlet temperature directly affects the temperature control of the subsequent finish rolling outlet temperature and coiling temperature. The heat exchange during the cooling process of the strip is a very complicated nonlinear process, which is difficult to accurately …
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Individually controllable water sprays form a strip cooling zone at a runout table between the last stand of a hot strip finishing train and a coiler. The times required for successive sections of the strip to traverse the runout table (designated residence times) are calculated from a predetermined strip velocity-time profile. Using the residence times, the finishing train …
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including the furnaces, castors, hot strip mill, plate mill, cold mill, continuous annealing line, and electric galvanizing line. Smarter Asset Management for Integrated Mill Operations uses the data from these sensors (for example, readings about flow rate, temperature, pressure,
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The monitoring of temperature with contact-free yet precise measurement of the object is gaining tremendous importance in the steel and iron industry. The temperature of raw steel, slab, and wire is of immense importance for the quality of the product in the various processing stages, as well as for the safety in the workplace.
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The reheat furnace brings the cold steel to the correct temperature for rolling. Temperature measurements here allow for optimised heating trajectories, providing considerable energy savings. Monitoring also ensures temperature uniformity and consistent product quality, reducing wastage.
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2.1 Outline of interstand strip position sensor The strip position sensor calculates the strip walk by filming a red hot high temperature strip steel sheet with high speed two di- mensional CCD cameras and recognizing the edge position of a strip steel sheet through image processing. Figure 1 shows the layout of a strip position sensor.
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Small. Medium. Large. Bokaro: The Bokaro Steel Plant (BSL) on Sunday begun trial of Artificial Intelligence (AI) based predictive monitoring system. BSL, a unit of Steel Authority of India Limited ...
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Appropriate correction for target emissivity is required for accurate surface temperature measurements. However, the simple correction that is commonly made, dividing the measured temperature by the target emissivity, is incorrect because it does not account for reflected radiation. The radiation detected by an infrared radiometer includes two ...
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Work roll temperature prediction model is an important part of shape control system in hot strip mill. This article performs work roll mesh generation, and establishes difference equations of each lattice point using two-dimensional alternating difference method. Then, the work roll temperature distribution at any time is acquired after solving equations with chasing method.
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Conventionally, the temperature of a hot strip on a hot-run table was measured at three points as shown in graph 1. At these three points of just after being rolled out (referred to as FT in Graph 1), in-between two cooling banks (IT in Graph 1), and before the coiler (post-cooling temperature; CT in Graph 1), the temperature was measured by ...
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3.5.4 Slab Yard: Slab Handling and transferring of slabs to downstream unit (Hot Strip Mill) 3.5.5 Fuel gases/Mixed gasses are used as source heating for heating purposes within the plant for meeting various refractory vessels. 3.5.6 Gas Recovery and Export system / Gas Holder: BOF process gas is recovered during O
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sing the peak picker allows to detect even smallest scale cracks which represent the "real" temperature to be measured; Application example hot strip rolling mill In this application it is measured by the pyrometer from below of the strip, so that the measurement result is not affected by scale or water puddles on the strip.
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The hot strip steel mill is universally considered one of the harshest environments for process instrumentation and sensors but as the material speed and temperature increases, so does the importance of the measurement values. Stereoscopic x-ray profile gauges have the ability to determine both the cross-thickness profile and the physical ...
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reduction to decrease through-thickness temperature differences. US Steel ran this case for Grade 50 steel in the hot strip mill (Trial 2). • For thicker gauge steel, a 60 second hold time and 12% roughing mill reduction increase should be applied to reduce the through-thickness temperature difference. Model Development . An analysis of the ...
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The paper deals with a physical model for the calculation of the strip temperature in a hot rolling mill. Beside the heat transfer from the strip to the environment in the different mill sections a sub‐model for the material properties of steel including phase transitions is introduced.
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The rolling speed is set to allow the last stand to perform the final reduction at the finishing temperature, between 820 deg C to 900 deg C, so as to achieve certain mechanical properties in the hot rolled strip. The finishing mills roll the transfer bar in tandem, meaning each bar is rolled through all the finishing stands at once.
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The Tosçelik Hot Strip Mill was originally commissioned in 2009 with an evaporative cooling circuit to remove heat from the skids in ... An HMI server and screens were added for remote operation and monitoring of the waste heat recovery system. ... If the actual drum temperature is higher than the set point, this would mean there is excess ...
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At present, adjusting mill velocity is usually applied to guarantee the control precision of finishing temperature FDT for many hot plants, so the forecast of strip velocity progression is frequently not realized as a result of current production conditions. It is difficult to eliminate the strip velocity fluctuation effect on cooling temperature for run-out table cooling control system.
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(Roll forming: )This film takes you through the processes within a hot rolling mill. You'll get to see the different stages all th...
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A method for controlling the temperature of a workpiece in a hot strip mill includes calculating temperature changes of the strip at each mill stand location …
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max. furnace temperature 1,250°C 2,280°F slab exit temperature 1,050–1,220°C 1,920–2,225°F Furnace length 291 m 955 feet rollers Water cooled with energy-saving fiber insulation — No. of burners 232 extra-low NOx — Hot strip mill strip width 900–1,980 mm 36–78 inches strip thickness 1.55–25.4 mm 0.61–1 inch coil weight Max ...
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The main objective of the article is to detail the current investigations to improve the control and supervision system of two identical walking-beam furnaces of a hot strip mill of the Ensidesa ...
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The hot strip mill can produce products from 1,6mm to 13,0mm thick depending on the grade. From Saldanha thicknesses from 1,5mm can be supplied. See thickness ranges in Hot Rolled Price List. The dimensions available are given in the data sheet: Hot Strip Mill Product Dimensions (file reference A1.1).
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Correct temperature monitoring is essential during the manufacturing process. We offer a full array of thermocouples, resistance temperature devices (RTDs and thermistors), infrared radiators, bimetallic devices, and liquid expansion devices. ... Measurement Equipment For …
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Steel Mill Reduces Downtime, Improves Productivity Through Wireless Monitoring of Secondary Systems SMART WIRELESS "I got the flow numbers I needed within 24 hours of installing the devices. Wireless is fantastic." Gary Borham Operations Manager 80" Hot Strip Finishing Mill RESULTS • 5% productivity improvement, downtime reduced
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1.7 Rolling mill control: Production of continuous sheets and strips is one of the attractive features of modern rolling mills. However, control of sheet thickness and cross-section is a real challenge. In order to continuously monitor the thickness of sheets rolled, x-ray or gamma ray sensors are used.
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The Hot Strip Mill no 2 of Hoogovens consists of four furnaces, a roughing mill of 5 stands, a finishin g mill of 7 stands, and a runout table and 3 coilers (See also fig.1).
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conduction, convection and radiation by/from the hot flames, hot flue gases and the hot furnace walls. The rollable temperature of the hot blooms/slabs ranges between 11500 C-1200° C. Thus the temperature inside the furnace is still higher. x There are many types of reheating furnaces with various designs.
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Measures strip and sheet temperature to efficiently set up the rolling mill to match the steel's temperature. These sensors also detect the presence of hot metal to accurately time the roll stand operation for maximum efficiency. LumaSense IS 320 Pyrometer, 150C TO 1200C and LumaSense IGA 320/23, 200C TO 1800C were utilized.
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