High-pressure piping will be made of pipe steel, in order to connect pipe flow to the valves for descaling and complete with heavy-duty PP clamps, fittings, hoses, etc. Descaling speed on the liner = 1.5–4 m/sec. Water descaling unit operates according to the required rolling speed/ mill capacity. MODEL 2.

A method for collecting mill scale from a hot rolling mill is provided. The hot rolling mill includes a flume. The method includes transporting mill scale particles in wastewater, retrieving the...

In steel production process of hot rolling and casting large amounts of water are used depending on the scale of the operation. As steel leaves the casting operations, cooling and cutting with water produces mill scale (iron oxides). This hot water from the mills is …

Between the crop shear and the first rolling stand of the finishing mill there is normally second scale breaker, whose task is the final scale removal. Water sprays above and below the transfer bar at around 200 kg/sq cm pressure break up the scale that has re-formed (secondary scale), as well as any scale that has persisted through earlier ...

The high pressure water jets are used to remove scale from the steel bars before they enter the rolling mill. Normally high pressure water is bypassed to the water pit when no bar is present, wasting energy. If the roughing mill is reversing, there are descale nozzles on either side, using even more energy.

rolling-mill train is 90 Tonnes/hour, and we estimate a formation of scale equal to 0.2% of the. production total, the maximum amount of scale that the contact water will remove is 18 Kg/hour ...

The advantage, with respect to the traditional scale pit solution, is a significant CapEx saving in civil works (-30%) and a substantial reduction of execution time (4 months). For more info Francesco Casarsa [email protected] +39 0432 195 8921

However, secondary scale continues to form on the descaled steel surface during the inter-pass delay time in the roughing and intermediate rolling mills. The colour of primary mill scale is generally bluish black while that of the secondary scale is blue. The secondary scale gives the steel an appearance which is similar to that of a lacquer ...

Continuous Hot Rolling. A continuous hot-rolling mill may have a conveyor that is several thousand feet long. The steel slab exits from a slab reheating furnace onto the beginning of the conveyor. Surface scale is removed from the heated slab, which then becomes thinner and longer as it is squeezed by horizontal rolls at each mill, usually ...

acid and oiled, the mill scale on the Hot Rolled Steel can be removed which protects it from rusting. Picking and oiling cost is somewhere in between regular hot rolling and cold rolling. End-Use Applications Hot Rolled Steel coil is produced as a feedstock for cold rolled steel coil and metallic-coated coils such as galvanized or galvannealed ...

Like something from another planet, the giant black rolling mills are silhouetted against the night sky. A steady thunder of unbearable sound hammers every inch of your body. Suddenly, from deep within the menacing structure, a fierce glow of orange light rips the darkness with blazing fire. Even from here, the shimmering heat makes you turn away.

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WATER ANALYSIS, NATIONAL STEEL CORPORATION, WEIRTON 00 Quality Water Use Non-contact cooling Runout table sprays on hot strip mill Cold rolling mills Pickle lines and other facilities TSS TDS 37 Hardness (A1203) Alkalinity (Methyl orange) Total Alkalinity, (CaC03) 2 3 Plating lines Boiler house 1 2250 34.2 47.9 50-100 For Quality 1: Na = 20 mg ...

During hot rolling of special grades of steel Nickel (Ni), mill scale is substantially increased. Surface finish of hot rolled product may be compromised due to pit marks caused by mill scale. Subsequent grinding operations are increased due to excessive mill scale.

The steel plant will have a 120 ton/hr rolling mill capacity. The Scale Pit, Step 1, will remove larger particles with a size greater or equal to 200 microns. TABLE 32.1 Cooling Water Use in an Integrated Steel Mill . water is recycled within a slag pit area, there is usually a high potential for depo-. Get Price.

Regular operation of collecting mill scale. The hot rolling process of forming steel slabs into coils under this study consisted of a series of procedures, including reheating, the first descaling with pressurized water, roughing, cropping, the second descaling, finishing and coiling. ... Since the pit mill scale sample from the roughing stream ...

"The SteelMax skimmer has done a consistently thorough job of removing hydraulic oil from our Rolling Mill Scale Pits. It has collected enough oil for resale from the water system to cover 50% of its initial cost within one year." — D.B., Plant Mechanical Engineer, Steel Dynamics Inc.

pit covers 4.3 Lubrication and hydraulic system as required to serve the Mill equipment shall be provided 4.4 All pipes, cable conduits, shall be guarded against damage from cobbles 4.5 A Scale flume running below the Mill line shall carry the mill scale to the centralised scale pit …

In the hot-rolling process, owing to oxidation reactions, mill scale is formed on the surfaces of semi-steel products in reheat furnaces and on rolling trains and stands [1,2,3].The mill scale is washed away from steel surfaces and flushed into flumes underneath the hot-rolling lines by a large amount of contact water, which includes descaling water and cooling water.

May 15 2020 · Localized corrosion at damaged mill scale and caved corrosion under the mill scale were generated through a galvanic coupling between the mill scale and steel. Primer layer aggravated localized corrosion and pit-formation due to the prolonged period of time that the mill scale can be retained on the steel surface. 3

• Percentage reduction in material loss due to mill scale by using anti-scale coating = 56.98% • On average, approximately a 70% reduction in mill scale is achieved by the use of anti-scale coating in open-die hot forging and hot rolling of stainless steel. This increases material yield and …

pit are located under/next to the rolling mill, consequently the concrete works are not so depth (-5 / -7 m). The scale pit unit collecting all water from contact circuits is located outside the building, because of the depth required (-10 / -15 m). The scale is removed continuously by the chain scrapers of the Dan-Dredge™. The scale ...

Osogbo Steel Rolling Mill. Prompt : Caesar is a famous mining equipment manufacturer well-known both at home and abroad, major in producing stone crushing equipment, mineral separation equipment, limestone grinding equipment, etc. The Zuma Steel rolling mill in Jos and the Osogbo Steel rolling mill have been grounded, Daily Trust can report.

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