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scale pit in steel rolling mill

MILL SCALE OPERATION AT JSW BELLARY HOT STRIP MILL

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Water (scale) pit in steel rolling mill? Yahoo Answers

03/01/2010· HSM only, 2 pits, first pit, the scale pit, collects the water from the reheat furnace (s) to the Roughing mill to coilbox to the end of the Finishing mills, but not the Run out tables. second pit...

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what is function of scale pit in steel mills

The scale pit is used to remove the larger scale and particulate as well as to skim the oil from the water and is normally sized for 30–45 minutes of retention time. In some mills this pit also receives wastewater from the hot roll and other miscellaneous processes throughout the mill.

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Mill scale Wikipedia

Mill scale, often shortened to just scale, is the flaky surface of hot rolled steel, consisting of the mixed iron oxides iron (II) oxide (FeO), iron (III) oxide (Fe 2 O 3), and iron (II,III) oxide (Fe 3 O 4, magnetite).

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Steel Mills: Removing Oil from Scale Pits

Oil Skimmers, Inc. has provided oil removal solutions to many steel mill companies to date. One customer, a steel mini-mill, had employed a vac truck service to periodically vacuum waste oil out of its scale pit. But vacuuming takes a lot of water along with the oil, and occasional visits didn't provide a solution to a continuous problem.

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Production of cleaner mill scale by dynamic separation of

01/03/2018· The mill scale is formed on steel surfaces due to oxidation reactions between steel and the oxidizing atmosphere in the reheat furnaces and on the rolling trains and the stands (Basabe and Szpunar, 2004; Vlaicu et al., 2010).

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SAFETY GUIDELINES FOR IRON & STEEL SECTOR

MINISTRY OF STEEL, GOVT. OF INDIA Hot Rolling Mills (Automatic) Doc. No: SG/37 Rev no. : 00 Effective Date: -- 1. OBJECTIVE Scale pit/settling tank xii. Drive mechanisms Some of critical Equipment/ facilities in Re-rolling Mills are as follows: Sl. No. Area Major equipments 1. Yard management section Slab/Billet handling transfer trolley, Roller tables and EOT /charging cranes etc.

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Production of cleaner mill scale by dynamic separation

01/03/2018· Reasons for the cleaner flume mill scale than the pit mill scale include a much shorter residence time of the flume mill scale in the oily wastewater and much stronger turbulence of the flume wastewater. This novel method of producing clean mill scale by dynamic separation of the mill scale from the fast-moving fume wastewater in the hot rolling process could be a cost-effective and

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Steel Mills: Removing Oil from Scale Pits

Oil Skimmers, Inc. has provided oil removal solutions to many steel mill companies to date. One customer, a steel mini-mill, had employed a vac truck service to periodically vacuum waste oil out of its scale pit. But vacuuming takes a lot of water along with the oil, and occasional visits didn't provide a solution to a continuous problem.

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Separation of Mill Scale from Flume Wastewater Using a

Along with the production of hot-rolled steel, a large amount of mixture of mill scale, water, and oil is constantly generated. It is of great importance to thoroughly separate these components from one another to make them recyclable. In the current research work, an industrial trial was carried out at an ArcelorMittal hot-rolling mill for producing clean mill scale with negligible oil by

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What exactly is Mill Scale and what is done about it

In a rolling mill where the steel will be stretched and squished the mill scale will first be removed mostly by water jets, or by sand blasting in some shops or by vibrating rolls in others and the mill scale will fall into a pit below the equipment where it will also be joined by rolling mill lubricants and bearing oils and water. From there it will be pumped to a holding pond, where

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PSE Engineering GmbH

PSE Engineering GmbH offers its clients a wide range of services in engineering, design, calculations and project management in the field of pipeline and plant construction and rehabilitation of systems for oil, gas ,water, steam and other media, as well as plants for supplying heat, cooling and potable water.

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Scale formation and its removal in Hot Rolling process

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 temperature, steel grade, surrounding atmosphere and the exposure time. 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

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Mill scale de-oiling Nalco Chemical Company

Mill scale was obtained from a steel mill operating in the Southwest. This mill scale was shaken and suspended in water and the formulations taught above were used successfully to remove at least 90% of the total oil from the mill scale so suspended. The mill scale used could not be utilized by the plant's sinter mill because of excessive

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Macro Defects in Steel Rolling Defects

Star crack Rolling defects Steel pit Rolling defects Sticker Hot rolled products Rolling defects Sticker break Electrolytic galvanizing line Rolling defects Sticker break Temper mill Rolling defects Sticker breaks Cold rolled uncoated sheet Rolling defects Sticky scale Rolling defects

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Adventures in Modeling a Rolling Mill Model Railroad

This rolling mill and the rest of your mill complex, in my humble opinion, truly capture heavy industry in scale. The detail, down to the reflection of hot steel ingots by the rollers in the rolling mill, make me see this as not only a nice piece of scale railroading, but a tribute to the strength of the steel industry a vital capability truly worth this modeling effort. Nice work and keep

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