Oct 02, 1995· Regarding hot rolling of steel, the quality of the rolled metal surfaces depends to a large extent on effective descaling. In order to …
Jul 04, 2018· Easiest and cheapest way to remove that awful nasty mill scale from hot rolled steel
May 08, 2014· 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 …
Oct 01, 2000· The facility at Salem Steel produces around 100 000 t/a, with an expansion to 200 000 t/a being planned; the rolling mill at Avesta Steel is designed for 250 000 t/a and produces just under 600 ...
Jan 14, 2017· For rolling of hot strip, the slabs are heated initially at 1100 deg C to 1300 deg C. The temperature in the last finishing stand of the hot strip mill varies from 700 deg C to 900 deg C. It is always to be above the upper critical temperature to produce uniform equiaxed ferrite grains.
A thin coherent, high pressure volume, curtain water wall of liquid is applied in a transverse direction across a surface of a strip in a hot rolling mill to uniformly remove oxide scaling from the strip's surface. A header is designed to have several passages which produce several discrete liquid flows which are directed into a pressure equalization zone prior to …
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. Especially in hot rolling combined with thin slab casting Lechler has been the pioneer with the development of the MiniSCALEMASTER ...
Our entire range of descaling nozzles provides: High-quality descaling resulting in smooth, streak-free surfaces. Efficient use of energy and water to reduce operating costs. Long service life to minimize nozzle expense. Easy maintenance and …
Find the right nozzles and headers to optimize every operation in your hot rolling mill, from descaling to roll and strip cooling and more. We're here to help. Menu Search
Descalers ensure a high surface quality in hot rolling mills. They blast the metal surface with pressurized water to remove the scale. A descaler consists of one or several spray headers with recessed spray nozzles directing jets of water diagonally at the material. Descalers are typically operated with a water pressure of 100 to 400 bar and a ...
The segmental descaling control method for the hot continuous rolling mill combines the production characteristics of the hot continuous rolling mill, divides descaling into five …
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.
HOT ROLLING. Optimal steel quality depends on optimal spray technology. 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 ...
during the heating-up and rolling processes is a decisive prerequisite for the production of strip or sheet with a perfect surface finish. With more than 140 descaling units installed …
Feb 08, 2013· 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 ...
Dec 01, 2004· Hydraulic descaling is an inherent part of the hot rolling process but can sometimes also be applied in the heat treatment process, continuous casting and other processes.
Oct 01, 2000· The facility at Salem Steel produces around 100 000 t/a, with an expansion to 200 000 t/a being planned; the rolling mill at Avesta Steel is designed for 250 000 t/a …
Jun 19, 2011· The red hot steel slab is manipulated into position first, then blast by high pressure water jets to descale the surface The slab then passed through the m...
Dec 22, 2013· Following reheating and descaling, the slabs are initially rolled in the roughing mill which is equipped with an edger and state of the art twin drives each with a motor power of 9.5 MW each. ... Other trend in the technological features of hot strip mill . Rolling speeds are becoming faster to increase productivity and reduce temperature loss ...
Dec 01, 2004· Hydraulic descaling is an inherent part of the hot rolling process but can sometimes also be applied in the heat treatment process, continuous casting and other processes. ... pilot mill static ...
In hot rolling mills, long products (e.g. wire rod, pipes, bars, rails, beams) or wide flat products (e.g. sheets, strip) are fabricated by rolling. A hot rolling mill consists of a reheating furnace, a descaling unit, a roller conveyor, a hot mill stand and a cooling bed. Other peripheral facilities include the cooling system with the cooling ...
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 13. the key descaling parameters include the facility, the descaling performance and the descaling conditions figure 1.
Aug 01, 1994· An overview of roll materials is given including adamites, high Cr materials, high speed tool steels and compound rolls. Non-uniform wear, recognised as the most detrimental phenomenon in section ...
The 5-stand finishing hot rolling mill has been kept as it was. In order to feed perfectly descaled strip into this mill under the new ... order to create ideal conditions for an optimum rolling process accurate descaling is essential. Beyond an excellent descaling performance itself, also side effects have to be considered and
PURPOSE: To descale efficiently a steel strip by bending the steel strip to be rolled at a specific flexural elongation rate and descaling the same by the injection of pressure water thereto prior to finish rolling of the steel sheet. CONSTITUTION: The steel sheet 2 to be rolled is passed between rolls 10 disposed above and below via pinch rolls 12 and is so …
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 ... Increases life of Pressure Rolls of Rolling Mill and reduces down time for repair & maintenance
Jan 24, 1995· PURPOSE: To effectively remove insular scales in a rough rolling stage before a finish rolling by pressing a pair of left and right vertical brush rolls to the side of a steel plate while rotating the brush rolls in the direction opposite to the advancing direction of the steel plate. CONSTITUTION: A slab 6 extracted from a heating furnace 1 is descaled …
Find the right nozzles and headers to optimize every operation in your hot rolling mill - boost quality, reduce downtime and lower operating costs with spray technology for descaling and roll and strip cooling. We're here to help.
Data Collection and Benchmarking The complex process of hydro mechanical descaling requires a thorough understanding of the process technology and the environment of a hot rolling mill. Tools such as computer simulation models, a standardized and complete check list (Fig. 1) for data collection and well developed audit procedures are essential ...
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 by projecting metallic grit. In addition to superficially cleaning the sheet metal, the descaling system, equipped with 600-atmosphere nozzles, removes all impurities during the rolling mill ...
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