Steel Rolling Mill Power Calculation

From the data in Table 1 and Fig. 3 it is apparent that the production of hot metal or pig iron is the most energy intensive process for steel production at roughly 13.5 × 10 9 joules per ton (1000 Kg) of pig iron produced. The basic oxygen furnace is the second most energy intensive process at 11 × 10 9 joules per ton or steel produced. The Electric arc furnace has significantly less energy ...

During manufacturing of heavy strips and plates from difficult-to-form steel grades on sheet and wide-strip rolling mills there is a problem of exact calculation of power parameters of rolling. It is pointed out that known methods do not provide required precise information at high deformation zones in a stand.

A billet of area of section 150 mm x 150 mm is rolled to 120 height in a rolling mill with 600 mm roll diameter at a temperature of 1100 °C at 3m/sec. The yield strength of material — 90 N/mm 2. The mill is driven by a motor which runs at 950 rpm and power is transmitted through a reduction gear box and a pinion box.

z c Number of inserts in the cut: a e /d 1 Ratio of radial width of cut to cutting diameter: Calculated Required Power. F t Tangential cutting force: lb N. T Torque at the cutter: Nm in.-lb ft-lb Nmm. Machining Power. P s at the cutter: (HPc) KW. P m at the motor: hp KW. These calculations are based upon theoretical values and are only intended ...

iron is converted to steel in the BOF. After casting and rolling and/or coating, the steel is delivered as strip, plate, sections or bars. Steel made in an EAF uses electricity to melt steel scrap. Depending on the plant configuration and availability of steel scrap, other sources of metallic iron such as direct-

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Rolling load calculation: 3.1 Properties of Material to be used for Hot Rolling: Material – A36 Mild Steel UTS – 400 Mpa Yield Strength – 250 Mpa Elongation – 20% Carbon – 0.26 Density – 7800 kg/m^3 Poisons ratio – 0.26 Shear Modulus – 79.3 Gpa Table 1: Effect of Temp on UTS PASSES TEMPARATURE ( ̊C) ULTIMATE TENSILE STRENGTH ...

The roll radius is 300 mm, and the rolls rotate at 100 rpm. Calculate the roll force and the power required. For annealed copper, it has a true stress of about 80 Mpa in the unstrained condition and at a true strain of 0.223, true stress is 280 Mpa. FOUR HIGH ROLLING MILL PROBLEMS AND DEFECTS IN ROLLED PRODUCTS

The mill modulus is 500-1,000 ton/mm for plate rolling mills and 400-600 ton/mm for cold rolling mills. The larger the diameter of the back-up rolls, the higher the mill modulus. A rolling force of the order of 1,000 tons is generated during rolling, …

Thread Rolling Figure 13.16 (a) Features of a machined or rolled thread. (b) Grain flow in machined and rolled threads. Unlike machining, which cuts through the grains of the metal, the rolling of threads causes improved strength, because of cold working and favorable grain flow. Figure 13.15 Thread-rolling processes: (a) and (c) reciprocating

Power calculation in a rolling operationI have published a book for production subject for gate mechanical exam.https://

Steel-Rolling Technology. : Ginzburg. CRC Press, Jun 28, 1989 - Technology & Engineering - 791 pages. 2 Reviews. "This state-of-the-art volume examines steel-rolling technology in a systematic and comprehensive manner--providing an excellent synthesis of current information from three different branches of science--physics, metallurgy, and ...

The Mill Load application is specifically developed for mill design/operation engineers to calculate roll separating force, rolling torque and power, etc. Typically, load calculation is needed for an existing mill when a new rolling process is applied either with higher reduction or in lower temperature or higher speed, or for a stronger material.

Calculations to determine energy savings for each operating condition based on historic operating data were developed for each scenario. AFD Energy Saving Opportunity #1: Gap Time The mill ROT system operated with a relatively efficient amount of gap time, or the time from when one slab was charged to the time the next arrived on the rolling mill.

The short time varying load, as occurs in rolling mills, and largely represented by electric arc furnaces (EAFs) with their almost instantaneous fluctuations in both active and reactive power, are the main sources of disturbance. The interconnection point in the grid between the power utility and the steel plant, generally designated

(PDF) Methodology for Calculation of Rolling Load and. Rolling load calculation: 3.1 Properties of Material to be used for Hot Rolling: Material A36 Mild Steel UTS 400 Mpa Yield Strength 250 Mpa Elongation 20% Carbon 0.26 Density 7800 kg/m^3 Poisons ratio 0.26 Shear Modulus 79.3 Gpa Table 1: Effect of Temp on UTS PASSES TEMPARATURE ( ̊C) ULTIMATE TENSILE …

2.3.3 Formulae for calculation of mean rolling pressure 93 2.4 Rolling Torque and Power 98 2.4.1 Lever arm method 98 2.4.2 Rolling power calculation 101 3. Rolling Practices 104 3.1 Layout of Stands 105 3.1.1 Single stand 105 3.1.2 Multi stands side by side 105 3.1.3 Looping train 106 3.1.4 Two-stand tandem mill 107

– Calculate roll separation force ("rolling force") and torque – Processing Limits – Calculate rolling power. Prof. Ramesh Singh, Notes by Dr. Singh/ Dr. Colton 13 Flat Rolling Analysis • Consider rolling of a flat plate in a 2-high rolling mill

*) A Sendzimir mill is a mill with small diameter work rolls, each backed up by two rolls of larger diameter which are in turn jointly backed up by a cluster of three rolls. This mill configu-ration is often used for height-strength- and stainless steel. Factbox 1 ABB and rolling mills Footnote 1) A pass is one deformation step consisting of the

Relatively little power is needed in the transport phases with constant speed. Geared motors in steel mills, especially in the rolling mill, are calculated and selected with a high operating factor based on the acceleration torque due to …

G. Engberg, L. Karlsson, in Fundamentals of Metallurgy, 2005 11.5.1 Hot rolling. Mill data from the hot strip mill has been used to calculate the mean flow stress in each pass, assuming the material to be elastic – ideally plastic. The roll force model used was a classical slab method with constant friction assumed in the roll gap. For the roughing mill (reversible 4-high) both roll …

Accurate prediction of the rolling force is critical to assuring the quality of the final product in steel manufacturing. Exit thickness of plate for each pass is calculated from roll gap, mill spring, and predicted roll force. Ideal pass scheduling is dependent on a precise prediction of the roll force in each pass. This paper will introduce a concept that allows obtaining the material model ...

3. The energy lost in power transmission system. 4. The energy lost in the form of electrical losses in the motor etc., Torque and Power in Cold Rolling *Power is applied to the rolling mill by applying Torque to the rolls and by using roll strip tension.*The total rolling load is distributed over the arc of contact.

steel works, and rolling mills (this group of industries is commonly referred to as the basic steel industry) decreased at an average annual rate of 2*8 percent between 19U7 and 1955* Stated the other way around, the output per man-hour increased at a …

Mill load and power calculation. For a mill supplier, this step is critical. For manufacture plant, roll designer usually use the past experience to decide whether the mill is strong enough to roll a certain product (grade and size).

Power which is applied to the rolling mill by applying a torque to the rolls and by means of work piece tension. The power is spent principally in four ways namely (i) energy needed to deform the metal, (ii) energy needed to overcome the frictional force, (iii) power lost in the pinions and power transmission system, and (iv) electrical losses ...

Two formulas have also been given to estimate the power required to reduce a strip of metal in a rolling mill; see Eqs. (5.8) and (5.9). Their predictions can now be compared and discussed in light of their assumptions. Consider the hot rolling of …

Mill power Usually, plant operators use mill power readings as an indicator of ball filling degree and, often, try to keep it at the maximum level. It is well known that the mill absorbed power depends on operating parameters other than ball level, such as pulp density and liner configuration. Figure 2 shows that there is no linear relation between

fourmula of rollingmill rolls pass steel rolling mill oval pass design formula Roll pass design is a set of methods for determining the dimensions shape number and type of arrangement of rolling mill passes Roll pass design also includes the calculation of pressing forces and their distribution on the roll. Read More

The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum and finally the …