Skip to main content
  • About us
    • Our Commitment
    • Sustainability
    • Innovation
    • Safety
    • Reliability
    • Leadership
    • Ethics & Compliance
    • Global Presence
    • Our Brands
      • Tenova HYL
      • Tenova Pyromet
      • Tenova Advanced Technologies
      • Tenova LOI Thermprocess
      • Tenova Italimpianti
      • Tenova I2S
      • Pomini Tenova
      • Tenova Material Handling
      • Nova Analytical Systems
      • TAKRAF
      • DELKOR
    • History
  • Metals Insights
  • Technologies
    • Iron & Steel
      • Ironmaking & Smelting
      • Melt Shops
      • Flat Products
      • Long Products
      • Plate Making
      • Pipe Making
      • Forging Technologies
      • Graphite Electrodes
    • Aluminum
      • Upstream Aluminum
      • Downstream Aluminum
      • Roll Shops Aluminum
    • Hydrometallurgy
      • Aluminum
      • Boron
      • Copper
      • Lithium
      • Manganese
      • Nickel & Cobalt
      • Phosphate - PPA
      • Rare Earths
      • Uranium
    • Pyrometallurgy
      • Ferro-Alloys
      • Mineral wool
      • Platinum Group Metals
      • Silicon Metal
      • Titanium
    • Grinding & Texturing
      • Roll Shops
      • Surface Grinding
    • Port Equipment
      • Bulk Material Handling
    • Our Green Solutions
      • Heat Recovery
      • Combustion Systems
      • Decarbonization
      • Recycling and By-products
      • Hydrogen
      • Lithium Battery Recycling
      • Texturing
    • Digital & Process Control
      • Digital & Automation
      • Intelligent Process Control
    • Industrial Gas Analyzers
      • Nova Analytical System by Tenova
  • People & Careers
    • Why Tenova?
    • Working at Tenova
    • Entering Tenova
    • Living and Growing at Tenova
  • Newsroom
    • News
    • Press Releases
    • Events
    • Media Kit
  • Our portals
  • Career portal
  • Supplier portal
  • Choose your way
  • Talents
  • Suppliers
  • Media
Tenova Tenova
I’m looking for
Technologies
  • Our Portals
    • Career portal
    • Supplier portal
Menu Menu
Menu
I’m looking for
  • About us
    • Our Commitment
    • Sustainability
    • Innovation
    • Safety
    • Reliability
    • Leadership
    • Ethics & Compliance
    • Global Presence
    • Our Brands
      • Tenova HYL
      • Tenova Pyromet
      • Tenova Advanced Technologies
      • Tenova LOI Thermprocess
      • Tenova Italimpianti
      • Tenova I2S
      • Pomini Tenova
      • Tenova Material Handling
      • Nova Analytical Systems
      • TAKRAF
      • DELKOR
    • History
  • Metals Insights
  • Technologies
    • Iron & Steel
      • Ironmaking & Smelting
      • Melt Shops
      • Flat Products
      • Long Products
      • Plate Making
      • Pipe Making
      • Forging Technologies
      • Graphite Electrodes
    • Aluminum
      • Upstream Aluminum
      • Downstream Aluminum
      • Roll Shops Aluminum
    • Hydrometallurgy
      • Aluminum
      • Boron
      • Copper
      • Lithium
      • Manganese
      • Nickel & Cobalt
      • Phosphate - PPA
      • Rare Earths
      • Uranium
    • Pyrometallurgy
      • Ferro-Alloys
      • Mineral wool
      • Platinum Group Metals
      • Silicon Metal
      • Titanium
    • Grinding & Texturing
      • Roll Shops
      • Surface Grinding
    • Port Equipment
      • Bulk Material Handling
    • Our Green Solutions
      • Heat Recovery
      • Combustion Systems
      • Decarbonization
      • Recycling and By-products
      • Hydrogen
      • Lithium Battery Recycling
      • Texturing
    • Digital & Process Control
      • Digital & Automation
      • Intelligent Process Control
    • Industrial Gas Analyzers
      • Nova Analytical System by Tenova
  • People & Careers
    • Why Tenova?
    • Working at Tenova
    • Entering Tenova
    • Living and Growing at Tenova
  • Newsroom
    • News
    • Press Releases
    • Events
    • Media Kit
Choose your way
  • Talents
  • Suppliers
  • Media
  • Tenova on Linkedin
  • Tenova on Twitter
  • Tenova on YouTube
  • Tenova on WeChat

Cold Rolled Annealing and Pickling Line (C-APL) for Stainless Steel Strip

Tenova, with its over 50 years of experience, has the competence and knowledge of the thermal, electrochemical and chemical processes, terminal equipment mechanical design, control and automation know how  which is required for the production of stainless steel strip.strip.

Share

Photo
6

Overview

The entry of an APL has a small sealing followed by a Preheating Furnace (PF). The strip is heated by waste gas coming from the Direct Fired Furnace (DFF), in the DFF strip is further heated to the required annealing temperatures and hold for certain soaking time. Strip is supported inside furnace by up-down rollers. After the annealing section, the strip enters a air cooling section followed by a water quench for final cooling and a wringer roller.

In recent years Tenova has addressed its research activities to develop innovative degreasing sections, new pickling technologies aimed at reducing both the polluting effects of the chemicals used and the overall process operational costs, optimized mechanical solution for terminal equipment, Skin Pass Mill sections, design solution to minimize the fire load and other.

After the annealing operation,  Electrolytic-descaling and  Pickling  are very important process in the manufacture of  Cold Rolled stainless steel

The Electrolytic descaling process convert and partially dissolve the thin but compact layer of scale present on the strip surface. The Tenova high efficiency electrolytic tanks, operated with Sulfuric acid  at controlled Temperature, tanks also to the  optimized geometries and high turbulence, reduce the electrical consumption  and eliminate the presence of Cr6+ in the bath

The following  pickling process is  needed to  dissolve a portion of the strip surface having not the correct percentage of alloy elements (so called Chromium depleted layer) 

So generally the Descaling and Pickling processes involving a multi-step chemical reactions, and is one of the most polluting and costly chemical processes in the steel industry due to the presence of the highly corrosive acids and hazardous substances such as hexavalent chromium, nitrates  and NOx.

Eco4 (ECOcological and ECOnomical stainless steel pickling process) is a new stainless steel pickling process developed by Tenova which avoids formation of hexavalent chromium (Cr6+) as above described, strongly improving the maintenance operator’s health and safety conditions, reduces or eliminate completely NOx and Nitrates in the waste water, reduces acid  and chemical reagent cost for acid and fumes treatments, reduces overall energy consumption and reduces the investment and operating costs for spent acid and waste waters regeneration and treatment.

Furthermore also fully re-generable acids  solution  is available for chemical tanks furtherly reducing or eliminating   cost for waste treatment and sludge disposal, recovering acid ( as HCL  or HF)  and alloy  metals  (Cr, Ni, Mn..

Innovation
Automation
Environment
Digital

Related Solutions

HPH® Bell-Type Annealing Furnace for Stainless Steel Strip
CNC Heavy Duty Roll Grinding Machines for Flat Product Rolling Mills
PDT™ Pomini Digital Texturing™
Pomini Automatic Roll Loaders and Roll Shops
Pomini Roll Shop Ancillary Equipment

Europe

Wolfgang Eggert

Wolfgang Eggert

General Manager Sales Heat Treatment of Steel Strip, Tenova LOI Thermprocess

Contact us

India

Prasanta Saha

Prasanta Saha

Director Sales, Tenova Technologies Pvt. Ltd.

Contact us

China

Peizhong Wang

Peizhong Wang

Director of Sales Tenova LOI Thermprocess, Tenova Technologies (Tianjin)

Contact us

Americas

Tom Walsh

Tom Walsh

Vice President Sales and Technology, Tenova Inc.

Contact us

RoW

Sascha Bothen

Sascha Bothen

Senior Vice President Sales & Marketing, Tenova LOI Thermprocess

Contact us

Modernization, Service & Spare Parts

Marc Reynaert

Marc Reynaert

Head of Revamp & Modernization, Tenova LOI Thermprocess

Contact us

Submit your request

By submitting your request and accepting the terms of this information, you declare that you have read and understood Tenova’s Privacy Policy about the processing of your data for the sole purpose of responding to your query.
For more details and the data retention period, please refer to the above-mentioned Privacy Policy.
Marketing consent

If you would like to be updated about Tenova’s activities, click on “I accept” to receive promotional or informative material concerning our company. By doing so, you declare that you have read and understood Tenova’s Privacy Policy and you consent to the processing of your data for communication and marketing purposes.
For more details, the data retention period and the withdrawal of consent, please refer to the above-mentioned Privacy Policy.

Tenova

Tenova is your worldwide partner for sustainable, innovative and reliable solutions in the metals and the mining industries.

From hydrometallurgy and pyrometallurgy to material handling, DRI to EAF, reheating furnaces to heat treatment furnaces, cold rolling mills to processing lines, roll grinders and texturing, our technologies minimize the environmental impact of your activities, operations, and final products.

 

Tenova S.p.A. Via Gerenzano, 58 - 21053 Castellanza - Italy

V.A.T. IT 04651530968.
REA MI-1763778
Share Capital € 18.443.700

Choose your way
  • Talents
  • Suppliers
  • Media
Choose your technologies
By Technologies
  • Iron & Steel Technologies
  • Aluminum Technologies
  • Hydrometallurgy
  • Pyrometallurgy
  • Grinding & Texturing
  • Port Equipment
  • Our Green Solutions
  • Digital & Process Control
  • Industrial Gas Analyzers
By Metals & Materials
  • Iron & Steel
  • Aluminum
  • Boron
  • Copper
  • Ferro-Alloys
  • Lithium
  • Manganese
  • Nickel & Cobalt
  • Phosphate - PPA
  • Platinum Group Metals
  • Rare Earths
  • Rockwool
  • Silicon Metal
  • Titanium
  • Uranium
By Green solutions
  • Heat Recovery
  • Combustion Systems
  • Decarbonization
  • Recycling and By-Products
  • Hydrogen
  • Lithium Battery Recycling
  • Texturing
  • Tenova on Linkedin
  • Tenova on Twitter
  • Tenova on YouTube
  • Tenova on WeChat
  • Privacy policy
  • Legal Disclaimer & Company Information
  • Contact
Tenova

Tenova is your worldwide partner for sustainable, innovative and reliable solutions in the metals and the mining industries.

From hydrometallurgy and pyrometallurgy to material handling, DRI to EAF, reheating furnaces to heat treatment furnaces, cold rolling mills to processing lines, roll grinders and texturing, our technologies minimize the environmental impact of your activities, operations, and final products.

 

Tenova S.p.A. Via Gerenzano, 58 - 21053 Castellanza - Italy

V.A.T. IT 04651530968.
REA MI-1763778
Share Capital € 18.443.700

Choose your way
  • Talents
  • Suppliers
  • Media
Choose your technologies
By Technologies
  • Iron & Steel Technologies
  • Aluminum Technologies
  • Hydrometallurgy
  • Pyrometallurgy
  • Grinding & Texturing
  • Port Equipment
  • Our Green Solutions
  • Digital & Process Control
  • Industrial Gas Analyzers
By Metals & Materials
  • Iron & Steel
  • Aluminum
  • Boron
  • Copper
  • Ferro-Alloys
  • Lithium
  • Manganese
  • Nickel & Cobalt
  • Phosphate - PPA
  • Platinum Group Metals
  • Rare Earths
  • Rockwool
  • Silicon Metal
  • Titanium
  • Uranium
By Green solutions
  • Heat Recovery
  • Combustion Systems
  • Decarbonization
  • Recycling and By-Products
  • Hydrogen
  • Lithium Battery Recycling
  • Texturing
  • Tenova on Linkedin
  • Tenova on Twitter
  • Tenova on YouTube
  • Tenova on WeChat
  • Privacy policy
  • Legal Disclaimer & Company Information
  • Contact

访问 Tenova 网站以了解最新信息

Tenova WeChat QR Code