what is function of scale pit in steel mills

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iron and steel industry - Students | Britannica Kids ...

comes into contact with the steel being processed, better quality water is used, although water containing as much as 3,410 ppm dissolved solids has been used for this purpose. Treatment of water for use in the iron and steel industry was not widely practiced. Disinfection and treatment for scale and corrosion

Steel - Continuous casting | Britannica

The separated waste oil enters into slag pit discharge, and the upper oil is recovered into circulation oil tank. The equipment list of clarification station: 1.1st Stage Precleaner c/w Pump 2.Vertical Continuous Setting Tank 3.Pure Oil Tank 4.Pure Oil Pump 5.Vacuum Oil Dryer c/w Float Tank and Pump 6.Sludge Oil Tank 7.2nd Stage Precleaner c/w Pump

Steel mill - Wikipedia

May 02, 2017· The world runs on steel. As a key element in transportation, construction, appliances, and many types of infrastructure, we all rely on steel's strength and security under pressure. That's why it's vital that all steel products are, to the greatest extent possible, defect-free.

Taconite | Minnesota DNR

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 …

Soaking Pits For Steel Ingots. On The Successful Rolling ...

Taconite is mined from the Mesabi Iron Range, near Hibbing, MN. Then it is processed into pellets and moved by train--or on ore boats from Duluth--to ports and steel mills around the Great Lakes region. Taconite process photos courtesy American Iron Ore Association and Hibbing Taconite.

steel mill scale pit design - rotary-gembloux.be

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.

What exactly is Mill Scale and what is done about it

D A Bayliss FlCorrT, FTSC, in Plant Engineer's Reference Book (Second Edition), 2002. 34.4.1 Structural steel (thickness greater than 5 mm) Abrasive blasting Abrasive blasting is generally the most suitable and reliable method of obtaining a visually clean surface and a satisfactory surface profile. Dry abrasive blast cleaning should be used on new steelwork where the main contaminant is ...

steel rolling mill scale pit

A steel mill or steelworks is an industrial plant for the manufacture of steel. It may be an integrated steel works carrying out all steps of steelmaking from smelting iron ore to rolled product, but may also describe plants where steel semi-finished casting products are made from molten pig iron or from scrap .

5.3.3 Finishing Operations | Forging Industry Association

Steel - Steel - Continuous casting: About 55 percent of the world's liquid steel production is solidified in continuous casting processes, the most widely used of which feeds liquid steel continuously into a short, water-cooled vertical copper mold and, at the same time, continuously withdraws the frozen shell, including the liquid steel it contains.

Pitting Corrosion - an overview | ScienceDirect Topics

M.G. Alvarez, J.R. Galvele, in Shreir's Corrosion, 2010. 2.04.11.2 Critical Pitting Temperature (CPT) Pitting corrosion of stainless steel and nickel base alloys is characterized by the existence of a CPT, which is defined as the lowest temperature at which the growth of stable pits is possible. At temperatures lower than CPT no stable pitting can occur and only transpassive corrosion takes place.

Water Requirements of the Iron and Steel Industry

These pits are commanded by an ingot crane, by preference so placed in relation to the blooming mill that the crane also commands the live rollers of the mill. Each pit is covered with a separate lid at the floor level, and after having been well dried and brought to a red heat by the insertion of hot ingots, they are ready for operation.

What is the Plate Lamination Defect? - Inspection for Industry

Windmill, device for tapping the energy of the wind by means of sails mounted on a rotating shaft. The sails are mounted at an angle or are given a slight twist so that the force of wind against them is divided into two components, one of which, in the plane of the sails, imparts rotation.

Steel Mini-Mill

SOLUTION: The steel mini-mill now uses six Oil Skimmer's oil-recovery systems to remove the tramp oil from the water in the collection basins as well as from a scale pit that was added during a rolling mill upgrade at the hot-strip mill. When operating continuously, each system removes 150 gallons of oil a day, said Ehren Plew, plant ...

Steel and Manufacturing Industry Solutions Water and ...

Scale formation of stainless steel alloys is not generally a problem. Aluminum alloys can be given a hard anodized surface to improve abrasion and corrosion resistance. Forgings made from copper based alloys generally exhibit good surface quality and high corrosion resistance that eliminates the need for most surface treatment operations.

What is the Plate Lamination Defect? - Inspection for Industry

rolling mill scale pit - tripoly. Water (scale) pit in steel rolling mill Yahoo Answers. Jan 03 2010 Best Answer 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 collects water from the start of the Run out Tables to the Downcoiler(s). the first pit is ...

Palm Oil Clarification Station - Palm Oil Mill Machine ...

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).. Mill scale is formed on the outer surfaces of plates, sheets or profiles when they are being produced by rolling red hot iron or steel billets in rolling mills.

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

three coils produced at the Hot Mill. Its primary function is to remove the thin layer of oxidized iron, or scale, that forms on the surface of the steel at the temperatures employed during hot rolling. The unit is capable of pickling 1.2 million tons per year of steel up to ¼" thick and 62" wide.

The Hot Rolling Process - California Steel Industries

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.

scale pit from steel mill

I was part of a team that designed and built of a greenfield steel plant in the mid-1980's. That plant cost $2.5b (not counting land cost), and it would be about $5b if built today. Of course, that was an integrated plant (coke ovens, blast furnac...

Scale Pit In Steel Rolling Mill - zandvoortse4daagse.nl

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.

What exactly is Mill Scale and what is done about it

Oct 10, 2016· Surface defects are (i) lap which appears as seam across the surface of the metal and occurs when a corner or fin is folded over and rolled but not welded into the metal, (ii) mill shearing which occurs as a feather-like lap, (iii) rolled in scale which occurs when mill scale is rolled into the steel, (iv) scabs which are long patches of loose ...

Steel and Manufacturing Industry Solutions Water and ...

steel mill scale pit design. scale pit in steel rolling mill - CGM Grinding Plant. Mill scale - Wikipedia, the free encyclopedia... scale is formed on the outer surfaces of plates, sheets or profiles when they are being produced by rolling red hot ... scale pit in steel rolling mill Grinding Mill China.

Mill scale - Wikipedia

Rolling of Steel in a Modern Long Product Rolling Mill, Rolling of Steel in a Modern Long Product Rolling Mill Long product is a common name for (i) reinforcement steel bars, (ii) shaped steel bar products such as rounds, flats, squares, and hexagon etc, (iii) sectional products such as angles (equal and unequal), channels, beams, tees, and special profiles etc, and (iv) wire rods Mills which ...

Soaking Pits For Steel Ingots. On The Successful Rolling ...

A carbon steel plate is produced by the process of hot or cold rolling a thick slab. During this process, carbon steel may pass through the rollers many times to achieve the desired thickness. Each pass results in an increase in the area of the plate and decreases in thickness. Any discontinuity present in the metal, such as porosity or ...

Millscale - an overview | ScienceDirect Topics

Scale formation of stainless steel alloys is not generally a problem. Aluminum alloys can be given a hard anodized surface to improve abrasion and corrosion resistance. Forgings made from copper based alloys generally exhibit good surface quality and high corrosion resistance that eliminates the need for most surface treatment operations.