[PDF] OF EXISTING HYDRO MECHANICAL DESCALING …
Over the life span of a rolling mill the requirements in terms of product quality and the range of steel grades may change significantly. In particular the capability ...
(PDF) Energy Saving and Process Optimization in a
A novel rotary applicator has been designed to feed high-pressure coolant jets while maintaining the tool's strength in order to improve the Ti-6Al-4V alloy's poor machinability.
TECHNOLOGICAL PACKAGE FOR BETTER PLATE SURFACE
TYPICAL SPECIFICATION FOR A PRIMARY DESCALER UNIT • System pressure = 200 bar • Header pressure = 180 bar • Descaling speed = 1m/sec • Top header height adjustment range of 350mm enabling nozzle height to remain constant for a given slab / ingot thickness • High impact force across full width of plate • Side spray for Ingot …
Multistep networks for roll force prediction in hot strip rolling …
Download : Download full-size image. Fig. 3. Plot of 200 examples of roll force from the training data. In the following subsections, three multi-step roll force prediction networks (MSN) are proposed: MSN (MSN-S) predicts roll force for each rolling pass based on the process parameters corresponding to that specific pass. MSN with …
Non‐linear optimal control for the hot‐steel rolling mill system
where is the difference in the strip speed entering and leaving the interstand space, is the strip speed leaving the upstream stand i, is the strip speed exiting the downstream stand, is the linear speed of the ith stand, is the linear speed of the ()th stand, is the coefficient of forward slip which occurs between the rolls at the ith stand and the …
What's the difference between hot and cold rolling mills?
In short, the workpiece is heated, the red and hot steel pieces burned on the equipment machine have been rolled many times, then cut and cut into a steel plate. The cold rolled coil is used as raw material. After stripping off the oxide skin, the cold rolled coil is used for cold treatment, and the finished product is coiled into the hard coil ...
SOLUTIONS FOR HOT ROLLING MILLS
1. DESCALING. DescaleJet® Pro nozzles and headers. 2. WASHDOWN AND BLOW OFF. FloodJet® nozzles FlatJet® nozzles WindJet® nozzles. 3. ROLL COOLING. VeeJet® …
Descaling in Hot-Rolling Mills | STAUFF
In hot rolling mills, descaling equipment ensures high surface quality. During descaling, the material surfaces are sprayed with water under high pressure to blast off and completely remove the scale. The working pressure can be up to 450 bar, depending on the size of the plant. Water volumes between 200 and 700 m³ per hour are used.
DESCALING SYSTEM
What we offer. The application fields range from primary descaling of slabs, blooms and billets to the subsequent descaling phases along the rolling mill line both of flat and long products (rails, beams, various profiles). Inoxihp can supply standard components to integrate into existing products or dedicated turnkey solutions for the most ...
Hot Rolling
3.17.2.1 Microstructure and Texture Evolution in the Hot Band. Hot rolling is an important step in the TMP chain as it significantly contributes to the development of the properties in the final sheet (31–36).The initial as-cast material comprises a coarse-grained cell structure with irregularly shaped coarse Al(Fe, Mn, Cu)Si constituent particles located on the …
2020 Technology and Operation of a Hot Rolling Mill …
Transfer bar cooling is installed just after the roughening mill. To realise an average temperature drop of 50°C on a 32 mm roughing mill bar, the surface needs to be strongly
A Comprehensive Guide to Hot Rolling Mill Process
A Comprehensive Guide to Hot Rolling Mill Process. The main objective of the entire steel rolling process is to create complete or semi-complete parts by deforming the massive plates and ingots to decrease the cross section in them. In metalworking processes, hot rolling mill is considered to be a commonly-used technique.
Energy Saving and Process Optimization in a Conventional …
The paper describes the conversion to a new generation of descaling nozzles in a conventional hot strip mill for steel. There are descaling stations behind the reheating furnace, on the roughing mill stands, and in front of the finishing mill. Before the converting, three high pressure pumps had been in operation to supply the descaling …
Pumps for descaling systemsin steel making
Design features. To remove mill scale from steel, large volumes of water must be sprayed at high pressure onto the slabs, ingots or billets over a period of 60 to 120 …
DESCALING SYSTEM
DESCALING SYSTEM - INOXIHP. The range of Inoxihp pumps and valves for the steel industry meets the demands for descaling any type of surface, both with direct pump …
Analysis of Spalling in Roughing Mill Backup Rolls …
Abstract and Figures. In this paper, the spalling causes of backup rolls in a roughing mill of a hot strip rolling mill were investigated. The roughing mill withstood extreme service conditions ...
Pickling of Hot Rolled Strip of Carbon Steel in …
Pickling solutions. For carbon (C) steel, sulphuric (H2SO4) acid is used in most batch pickling operations, whereas hydrochloric (HCl) acid has become the pickling agent of choice, as of 1994, for continuous …
Descaling | Our applications | Lechler
In hydro-mechanical descaling processes the jets are formed by special descaling nozzles which are arranged on spray headers in a so called descaling box (or …
Scale formation and its removal in Hot rolling Process
View PDF. Scale formation and its removal in Hot rolling Process Santosh Chacko, Suresh Vasani, A.K.Ray Lechler (India) Pvt. Ltd., Thane, India E-mail: lechler@lechlerindia During hot rolling of steel, its surface is exposed to air which leads to oxidation, resulting in scale formation. The scale formation is affected by the …
ALUMINIUM AND NON-FERROUS METALS
Danieli has a full range of flexible hot mill configurations to meet customers' requirements. Optimal solutions can be provided for single-stand reversing roughing mills, multi-stand finishing mills, twin-coiler single-stand finishing mills, and combination plate and coil mills. These designs have advanced process control systems to deliver ...
SOLUTIONS FOR HOT ROLLING MILLS
solutions for hot rolling mills descaling • interstand cooling roll cooling • laminar cooling runout table cooling • loose scale removal • spot spraying c1 section table of contents
The Work Roll Bending Control System of the Hot Plate …
A majority of modern rolling mills to eliminate the roll bending value during the operation, are equipped with a work roll bending system (WRBS) [4]. WRBS has a hydraulic cylinders at the roll edges, which create a compensation force. The value of this force must convert the bending curve into constant roll-gap.
CFD Analysis on a High Pressure Pump for Descaling in the …
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 …
Mill Scale
Mill scale is a flaky surface that can be found on iron oxides and metals that have been hot rolled. Mill scale forms on exterior surfaces of sheets and plates as they are being manufactured through rolling steel billets and hot iron into rolling mills. Mill scale typically consists of iron oxides that are bluish black.
Descaling | Lechler
The descaling system has a fundamental function inside a hot rolling mill plant: it eliminates the slag or the surface calamine present on the metal …
(PDF) Modelling descaling during hot rolling of steel
Abstract and Figures. A Computer model was developed to study the stresses that develop within the oxide formed on the Surface of reheated steel slabs. The model considers that the crust grows ...
Characterization of hot rolled scales-root cause identification …
Hot rolled steel strips are produced by rolling of steel slabs of 210 mm thickness at 1150–1200 °C through roughing and finishing mills of a hot strip mill to a thickness of 1.6–6 mm. During hot rolling, some adherent oxides, known as scales, is formed on the strip surface in the reheating furnace prior to hot rolling due to high ...
Mill Scale: What It Is & How To Remove It
Pro Tip:The best abrasives for this task are those that can remove mill scale thoroughly without causing excessive damage to the underlying metal. One of the best abrasives for mill scale removal is ceramic. Ceramic is one of the strongest and longest-lasting abrasive grains on the market. It can effectively sand steel and remove mill scale ...
(PDF) Effect of Processing Parameters on Scale Formation During …
Abstract and Figures. The influence of processing parameters (slab thickness, water flow of interstand cooling and oil flow in roll gap lubrication system) on the thickness and composition of the ...
AUDITS OF EXISTING HYDRO MECHANICAL DESCALING …
The introduction of modern strip surface inspection systems has intensified the focus on the optimisation of de-scaling systems, too. A descaling system audit is a systematic and structured approach to determine how the existing nozzle and header arrangement, operational and maintenance practices and process data influence the surface quality.
