Rizhao Steel's pickling and galvanizing line
Our PGL, a multi-process line, produces 700,000 tons of galvanized steel annually. By combining the pickling and galvanizing processes in a single system, this integrated line provides high added value for the customer in terms of profitability and environmental benefits. The incoming material is hot-rolled, low-carbon steel strip coming from the adjacent endless strip production …
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Steel Processing, Acid (HCL) Heating in pickling bath
Tantalum Shell and Tube Heat Exchangers for HCL heating in Pickling Baths: Its extensive inert & heat transfer properties, TANTALUM shell & tube heat exchanger is having vital role in hydrochloric acid heating at high turbulence shallow tanks pickle bath.
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High-Tech Tandem Cold Mills Cold rolling technology for ...
with our approved turbulence-pickling technology, permitting an optimum control of the hydrochloric-acid concentration and of the strip temperature during strip treatment. Entry end to tandem cold mill. "Creative art" on the foundation of the combined pickling line/tandem cold mill.
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HYDROCHLORIC ACID REGENERATION PLANT
Acid Regeneration Technology Waste Pickle liquor (WPL) is an acidic effluent generated by Pickling Line in Cold Rolling Mill of Steel Plant. Being acidic in nature it's been a potential hazard to the environment even after neutralization treatment. The Acid re-generation technology has been developed
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Pickling Steel - American Galvanizers Association
Sulfuric acid is generally heated for pickling where hydrochloric acid is used at ambient temperature. Hydrochloric acid is highly volatile so temperatures are kept lower in order to reduce fuming of corrosive vapors. Each choice of acid comes with advantages and disadvantages, they are summarized in Table 1 and Table 2.
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The Whys and Hows of Hydrochloric Acid Pickling
In the early 1960's a major change in high speed pickling technology took place- the introduction of hydrochloric (muriatic) acid pickling. Some specialty picklers had used hydrochloric acid previously, especially if a high quality surface was needed, but the expense, corrosiveness and fuming problems made this acid unattractive.
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Voestalpine ploughs EUR188m into new Linz pickling line ...
Pickling is a process in the manufacture of cold-rolled steel strip and is an intermediate step between hot and cold rolling. The acid removes mill scale, a dark oxidation layer which forms on the ...
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[PDF] EMISSIONS OF HYDROCHLORIC ACID VAPORS …
The most important pollutant emitted in the sector of pickling within a cold strip mill in an integrated steel mill are the hydrochloric acid vapors. This work presents the chemical reactions between the hydrochloric acid and iron oxides layers formed on the surface of the steel strip after the hot rolling process and it analyzes different areas of the pickling line as generators …
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Regeneration systems for hydrochloric waste pickling …
The following are guideline values for a pickling plant for low-carbon strip, based on 32 percent by weight of hydrochloric acid: Acid consumption without regeneration system: 18-30 kg/t material to be pickled Heat consumption for spray-roasting and fluidized bed reactors as a function of the iron content in the waste pickling acid from the
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[PDF] EMISSIONS OF HYDROCHLORIC ACID VAPORS GENERATED BY ...
The most important pollutant emitted in the sector of pickling within a cold strip mill in an integrated steel mill are the hydrochloric acid vapors. This work presents the chemical reactions between the hydrochloric acid and iron oxides layers formed on the surface of the steel strip after the hot rolling process and it analyzes different areas of the pickling line as generators …
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China Cold Rolling Mill manufacturer, Temper Mill, Skin ...
1450 Push Pull Pickling Line/Hydrochloric Acid Line/Shot Blast Pickling Line FOB Price: US $860,000-2,300,000 / Set Min. Order: 1 Set
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Steel Pickling: The Essential Guide - MachineMfg
The hydrochloric acid pickling iron loss is 0.4% to 0.5% of the acid pickling strip, and sulfuric acid is 0.6% to 0.7%. The hydrochloric acid pickling rate is higher, which is 2 times the sulfuric acid pickling rate. In recent years, due to the development of hydrochloric acid waste acid recovery and treatment technology (that is, the ...
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EMISSIONS OF HYDROCHLORIC ACID VAPORS GENERATED …
BY PICKLING PROCESS FROM COLD ROLLING MILL OF STEEL STRIPS Anisoara CIOCAN "Dunarea de Jos" University of Galati, 111, Domnească Street, 800201, Galaţi, Romania e-mail: [email protected] ABSTRACT The most important pollutant emitted in the sector of pickling within a cold strip mill in an integrated steel mill are the hydrochloric acid vapors.
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Cold Rolling - Reduced Steam Use in the Acid Pickling Line ...
In the pickling line, heat escapes through evaporation from the hydrochloric acid bath. The bath is normally heated to temperatures of 95 ° C. It is reported that steam use can be reducedby installing a system of lids and floating balls on top of the bath.
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Cold rolling
Cold rolling. The cold-rolling of pickled strips takes place on the reversing four-high stands with roll surface widths of 1200 mm, 1700 mm, and 1760 mm. Cold rolling is defined as the process of forming a given metal below its typical recrystallization temperature by rolling. During cold rolling, the crystals of the metal are strongly ...
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ARP-Acid Regeneration Plant
ARP-Acid Regeneration Plant. HCl Regeneration Systems or Acid Regeneration Plant (ARP) work together with pickling lines. By spray roasting method, waste pickle liquor(WPL) from pickling line is converted to ferric oxide(Fe 2 O 3)and gaseous hydrogen chloride(HCl), which would be absorbed by rinsing water from pickling line, thus hydrochloric acid of18%(wt) …
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The production process of the cold rolled steel coil - The ...
1.Pickling.A continuous pickling unit is used to remove the surface iron oxide scale of hot rolled coil.Acid is now mostly hydrochloric acid.Before pickling, first process is welding and rolling, some also go through continuous "black annealing".After pickling, the next processes are wash, dry, trim and roll. 2.Cold rolling.After the pickling ...
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Understanding the Pickle Line | Metal Processing Machinery ...
Understanding the Pickle Line. Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, rust or scale from ferrous metals, copper, precious metals and aluminum alloys. A solution called pickle liquor, which contains strong acids, is used to remove the surface impurities.
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