image

CONSTED is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants , industrial milling equipments and beneficiation plants.

contact info

social networks

HOT ROLLING - FLAT PRODUCTS | Primetals Technologies

HOT STRIP MILL — HIGHEST PERFORMANCE FOR NEW AND EXISTING STEEL MILLS The demand for hot rolled strip is growing in multiple ways. To remain competitive, new and existing mills must meet this challenge in the best possible way. The production of hot strip is a …

CN100563862C - The high-pressure water descaling system of ...

The invention discloses the high-pressure water descaling system that a kind of Ferrous Metallurgy field is used for the operation of rolling, particularly be suitable for the descaling system of slab, plate sheet and strip.Technical problem to be solved by this invention provides super-pressure, the low discharge high-pressure water descaling system in a kind of sheet billet hot continuous ...

Scale formation and its removal in Hot Rolling process

descaling system. The paper focuses on the recent innovations of descaling nozzles. INTRODUCTION Besides the customers in the automotive industry, manufacturers of construction and agricultural machinery using hot rolled steel for outer body parts demand defect free surfaces. The production of oil and gas pipe lines also has set very stringent ...

(PDF) Scale formation and its removal in Hot rolling ...

There are two kinds of scales relevant in rolling mills – sticky and dry scales. Sticky scales can be removed most effectively by use of high pressure water jets upto 450 bar. Dry scales can be removed from the surface by application of descaling systems with low distances of the descaling …

Offset high-pressure water descaling system - Tippins ...

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.

HOT ROLLING SURFACE QUALITY ISSUES1

This paper will focus on the rolled in type of defects as this is the most frequent class of defects faced during hot rolling operations. 2.1 Rolled in Scale Rolled in scale is the number one surface quality issue that most structural plate/coil hot rolling facilities face. It …

Hot-rolled steel strip manufacturing and descaling method ...

A continuous manufacturing apparatus for descaling and cold-rolling hot-rolled steel strips according to claim 34, wherein the cold-rolling machine or the hot-rolling machine has a pair of work rolls, and the work rolls are composite rolls, each of which comprises a shaft member and an outer layer formed over the shaft member and having a ...

Descaler Pump Energy Savings | TMEIC

Running the descaler pump at constant speed wastes energy and water, and heavy maintenance is required on the motor, bypass valves, and the pump. Control system tests in a steel mill using a variable speed pump showed annual electrical savings of 1,320 MWh/year. With an electricity cost of $0.10 per kWh, the savings are $132,000 per year.

DESCALING TECHNOLOGY - SMSgroup

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.

Nozzles and Technology for Hydromechanical Descaling

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.

Efficient and effective descaling in the Steel industry

Within the hot rolling mill, descaling equipment is placed before the mill or after the mill stand and it takes the low pressure water from the plant water supply, creates high pressure water, which is sprayed onto the surface of the hot steel to remove the scale. ... Removing the scale also helps to reduce the wear of the mill stand's rolls ...

Professional reports | Lechler US

Professional reports Metallurgy. Roll cooling: General aspects of roll cooling for hot & cold rolling mills (copy 2) – 07/2018 pdf, 839 KB. Secondary cooling in continuous casting: Increased productivity and quality through conversion of secondary cooling – 12/2016 pdf, 1 .

Products › Flat › Hot Strip Mills Modern rolling mills ...

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.

Abstract - Konstantin Zajtsev - The control system for ...

The control system for descaling hot-rolled sheet mill. Contents. Introduction. 1. Overview and analysis the current approach to automating the process of descaling. 1.1 General information about the process of descaling. 1.2 Investigation of the device and the functioning of the system descaling.

The Hot Rolling Process - California Steel

In part because further descaling is not particularly practical once finish rolling begins, the #2 Scale Breaker is the last opportunity to remove oxidation before the finished hot-rolled strip is coiled. Typically, the descaling system in the Hot Strip Mill is very effective at removing primary (from the furnace) and secondary (regrown

Roughing Mill - an overview | ScienceDirect Topics

Consider the hot rolling of a low-carbon steel strip in a single stand roughing mill. Let the entry thickness of the slab be 20 mm and its width to be 2000 mm. Its resistance to deformation is taken to be 150 MPa. It is reduced by 30% using work rolls of 800 mm diameter, rotating at 50 rpm.

An effective descaling system for hot rolling

The mechanical design calculations and features of a modern high-pressure descaler systems at Dofasco No. 2 hot mill to effectively remove the types of scale that grow during hot rolling ...

Energy Saving Drives for Hot Strip Mills

The Descale Booster system draws water from the DC Tank to provide a pressurized header for the suction of the main Descale pumps and supply cooling water to mill roller tables and other consumers. A pressure regulating valve at the pump discharge header

Removing Mill Scale from Steel Surfaces - Latem Industries

Identifying Mill Scale. Mill scale (often known simply as 'scale') refers to the thin, flaky texture that forms on the outer surface of hot-rolled iron oxides and metals. It is a by-product of manufacturing hot-rolled metal plates and sheets, occurring as the surface oxidizes during the heating, conditioning and hot rolling processes.

The water descaling system uses high pressure descaling ...

Benefits Of Descaling System (Why Water De-scaler Required) Improves quality of Rolled Product by preventing fusion of oxidized scale into base material Reduces Rejection by preventing surface defects of parent material Increases life of Pressure Rolls of Rolling Mill and reduces down time for repair & …

Mechanical descaling | Wheelabrator

The production of hot rolled strip is achieved in-line: annealing, cooling, mechanical descaling and pickling are combined in integrated processing lines. Wheelabrator shot blast systems are available for narrow, medium and wide strip and are well proven in …

Hot Rolling Spray Solutions | Spraying Systems Co.

Spraying Systems Co. offers a wide range of superior nozzles and headers for descaling and cooling — along with local steel experts to assist you with product selection, cooling calculations, specialized testing and more. For decades we've helped hot rolling mills around the world improve steel quality, reduce downtime and operating costs ...

US5661884A - Offset high-pressure water descaling system ...

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. The upper and lower spray headers are offset at a distance greater ...

A BASIC UNDERSTANDING OF THE MECHANICS OF …

cooling system. Problems of this kind can never really be calculated but they have a detrimental effect on all rolling schedules including stresses in the roll. As regards "abnormal" rolling conditions - which are more or less very "normal" for rolling mills - roll damage often occurs with consequences for the mill and the rolled product.

Buma | Hot Rolling

High Pressure Descaling before the Finishing Mill. For wear reduction and better water drain inside the descaler box we received the order to modernize the descaling unit on the entry side of the finishing mill. We reused the existing rotating descaling system. The box was designed to allow experiments with descaling headers with Scalemaster ...

hot rolling mill

The New Hot Rolling Mill Becomes a Reality. May 18 2021 The new hot rolling mill has the latest equipment in technology and is 100 automated with more than 6 000 sensors installed throughout the mill which allows for excellent precision in its operations In the next few days steel roller tests are scheduled to run official operations in June.

Mechanical Descalers - Rockford Manufacturing Group

A mechanical descaler is a simple, effective and practical system for breaking and removing mill scale. The MD-10 for wire diameter up to 0.406" (10 mm) rod. The MD-14 for up to 0.562" (14mm) rod. The MD-19 for up to 0.750" (19mm) rod for Auto Setup. The MD-25 for up to 1" (25mm) rod for Auto Setup.

Pumps for descaling systemsin steel making - ScienceDirect

Hot rolling therefore involves the formation of mill scale (ferric oxide 2Fe 2 O 3), that has to be removed before the process is finished. In this step, which is referred to as "spray descaling", the rolled bar passes through a descaling system prior to further forming.

Mechanical Processes for Descaling of Steel – IspatGuru

Several types of descaling processes are used for removal of scale from the surface of the hot rolled steels. These descaling processes are usually classified into four categories. These are (i) flame cleaning process, (ii) mechanical descaling processes, (iii) hydraulic descaling process, and (iv) chemical descaling processes.

(PDF) Wear of hot rolling mill rolls: an overview

tons of hot rolled steel per millimetre of machined roll diameter (t/mm), whereas typical flat rolls have "lives" about 5 . 10 3 -20 . 10 3 t/mm [1,7,8]. Such a variet y of roll wear criteria ...

Kamat: Hydromechanical descaling

Descaling Steel hydromechanically With KAMAT high-pressure pump systems, slabs and billets in rolling mills can be efficiently descaled hydromechanically. With the annealing of steel, oxygen reacts with iron on the hot metal surface. Iron oxides, so-called scale, arise.

NEXT-GENERATION ROLLING MILL STAND | Primetals …

HSS is normally rolled in tandem cold mills (TCMs) that employ 4-high or 6-high rolling stands with work-roll diameters ranging from 630 mm to 420 mm. HSS exceeding 980 MPa has been manufactured by extending TCMs with the installation of an additional mill stand. However, the demand for steels with up to 1,500 MPa makes it almost impossible to ...

SAFETY GUIDELINES FOR IRON & STEEL SECTOR

send to the roughing train of the mill for rolling process. b) Roller table: To discharge the hot blooms/billets/slabs to rolling mill for rolling operation. III. Mill Section: To roll the hot blooms / billets / slabs etc. into desired shape by passing it between set of revolving rolls. The rolls may be plain or grooved rolls depending on product.