Hot Rolling Mill. The present invention provides a descaling system for hot strip or plate mills. The descaling system includes upper and lower spray headers which are offset from each other along the pass line. Each spray header is adapted to direct a high-pressure water spray on the metal product to descale the upper or lower surface thereof.
This process, called descaling, is used in hot rolling, for example. A number of jets must be used to cover the total width of a rolled strip. High quality and homogeneity of the descaling process ...
Rolling mill equipment ; rolling mills for steel, designation of descaling equipment in hot rolling mills .14: Meanwhile, it introduced kusters hot rolling mill compound facilities and adopted the unique one - step - and - a - …
1. 1-11. (canceled) 12. A method of descaling of thin slabs in a hot strip rolling mill train or strips in a strip treatment installation by spraying a liquid gas onto a to-be descaled surface of the strip slabs or strips, characterized in that the liquid gas is a mixture of cryogens with a carrier medium such as compressed air; and that a liquefied cryogen, if necessary, together with the ...
The rolling mill for mechanical descaling of hot rolled steel is constructed according to the slidable roll process with reducing rolls so that a unform operation with different and/or changing shape steel strips can obtained. This is attained when the rolling mill has at least two rolls slidable in opposite directions whose body surfaces are ...
Regarding hot rolling of steel, the quality of the rolled metal surfaces depends to a large extent on effective descaling. In order to avoid surface damage, iron oxide scale layers are therefore removed from the hot steel surface by high-pressure water spraying prior to the actual hot rolling process.
Scale formation and its removal in Hot rolling Process Santosh Chacko, Suresh Vasani, A.K.Ray Lechler (India) Pvt. Ltd., Thane, India ... There are two kinds of scales relevant in rolling mills – sticky ... Dry scales can be removed from the surface by application of descaling systems with low distances of the descaling nozzle to the material.
In order to keep up economic development and to meet the market's needs for mass of roll steel,producing large-specification roll of steel plates with higher quality, the hot-rolling mill carry out three period of the technical improvement, replacing the six high pressure water pump which can't meet the need of providing high speed water for ...
DESCALE-MASTER. High-pressure water descaler. BENEFITS. Total descaling solutions for the entire rolling mill. Optimized and right-sized pumping stations. Designed to achieve maximum impact with optimal water and power. Maintenance and operator-friendly design. Reduced cost of operation. Totally scale-free products with reduced conversion costs.
AUDITS OF EXISTING HYDRO MECHANICAL DESCALING SYSTEMS IN HOT ROLLING MILLS AS A METHOD TO ENHANCE PRODUCT QUALITY Jürgen W. Frick Lechler D-72555 Metzingen / Germany E-mail : [email protected] Abstract : Over the life span of a rolling mill the requirements in terms of product quality and the range of steel grades may change significantly.
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 conventional hot strip mills and CSP® plants. The SMS components …
China Cold Rolling Mill to Make 2 Ribbed Steel Bar, Find details about China Cold Ribbed Steel Wire Line, Cold Rolling and Ribbing Production Line from Cold Rolling Mill to Make 2 Ribbed Steel Bar - Henan Jindi Machinery Equipment Co., Ltd.
of hot strip mill, tunnel furnaces are the central link be-tween the caster and the rolling mill. They are used to heat and/or equalize the slab temperature in reheating operations of about 12–20min. In general, tunnel furnaces operate over the temperature range of 1000–1200°C. During hot rolling of steel strip, oxide scales can gener-ate ...
Apparatus for descaling hot strip in a rolling mill DE19535789C2 (en) * : : Hermetik Hydraulik Ab: Device for descaling semi-finished products DE19925809A1 (en) * : : Sms Demag Ag: Descaling process for a metal strip and descaling arrangement corresponding to it
HOT ROLLING MILLS DESCALING SECTION TABLE OF CONTENTS. PLACING YOUR ORDER Call your local steel specialist for application assistance or to place an order. DESCALING NOZZLE QUICK REFERENCE GUIDE Model Flow Rate Range at 2000 psi (138 …
Billet Selection and Heating of 0.8MTA Hot Rolled Wire Rod Mill Production Line. In this Hot Rolled Wire Rod Mill production line because of the close distance between the continuous casting machine and rolling line, the hot billet is used as raw material and hot charging process of continuous casting billet is adopted.
Keywords: HSM (Hot Strip Mill), Descaling, Rolled in scale, Impact force, Erosion pattern 1. INTRODUCTION Descaling is a key process of hot rolling, especially when a good surface quality of the hot rolled products is demanded. Many studies have been made on the descaling technique of the hot strip mill (HSM) process (1-3). The key descaling ...
The cooling system for the rolls of thick-wall rolling mills was optimized and modified for Voestalpine Stahl (Austria), U.S. Steel Kosice, Ltd. (Slovakia), and STEEL (Korea). A collector prototype for hydraulic descaling is currently tested …
The Hot Strip Mill represents the most productive solution for flat rolled products. It provides the highest level of productivity together with a large product mix and outstanding quality. Yearly productivity of Hot Strip Mills can vary from 2 to 6 Mtpy, depending on the configuration that is selected.
rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process and cold rolling processes the most tonnage out of all cold working processes. There are many types of rolling processes, including flat rolling, foil rolling, ring rolling, roll bending, roll forming, profile rolling, and controlled rolling.
Descaling nozzles for every hot rolling mill From primary descaling behind the reheating furnace to mill descaling in roughing mills up to descaling prior to the finishing mill, Lechler offers the right product for the application. This goes also for plate mills, narrow and wide hot strip mills as well as for bar, wire and structural mills.
The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.
S MIE AG Hot Flat Rolling Mills 2 SMS Siemag does not treat descaling as an isolated measure but as an integral part of the process chain from continuous casting through hot and cold rolling up to final strip processing. Strips with an excellent surface quality can be produced only if well-tuned measures are taken in all process steps.
In addition, there are different perceptions of "roll wear" amongst rolling mill operators, designers and roll producers. Roll "performance" is a vague term that may concern: mass or length of hot ...
The exposure of iron to oxygen in the air results in the formation of oxide scales on the steel surface. Therefore, it is very important to descale the steel to ensure a high surface quality in hot rolling mills. The descaler consists of several spray headers with nozzles that direct jets of water diagonally at the surface and typically operate at very high pressures of up to 400 bar. The high ...
Mechanical Processes for Descaling of Steel. Scale is the product of oxidation which takes place during hot rolling. The oxidation and scale formation of steel is an unavoidable phenomenon during the process of hot rolling which involve reheating of steel in a reheating furnace, multi-pass hot rolling and air-cooling in the inter-pass delay ...
Low carbon steel was oxidized over the temperature range 1050-1250°C in O2-CO2H2O-N2 gas mixtures in order to study the hydraulic descaling process. The oxidation times were 15-120 min. and the scales were 130-2000 mum thick. The experimental parameters were chosen to approximate scale formation under conditions similar to those of reheating ...
UTPSL provide High Pressure Descaling System for removal of scale from hot metal before rolling in steel plants.Descaling Systems can be designed for Billet,Slab,Plate,Bloom Forging, Seamless Pipe,Profiles etc for Primary descaling
When hot rolling steel in the laboratory, using relatively small rolling mills, values of 4–20 kW/m 2 K appear to be the correct magnitudes. If modelling hot rolling of steel under industrial conditions, values of 50–120 kW/m 2 K are more useful. In both cases, the layer of scale is an important parameter.
Keywords: HSM (Hot Strip Mill), Descaling, Rolled in scale, Impact force, Erosion pattern 1. INTRODUCTION Descaling is a key process of hot rolling, especially when a good surface quality of the hot rolled products is demanded. Many studies have been made on the descaling technique of the hot strip mill (HSM) process (1-3). The key descaling ...
