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Annealing and Pickling Line (APL) for Silicon Steel Strip

The hot rolled strips (NGO and GO) are initially side trimmed through a rotating turret trimmer, annealed in a continuous process to eliminate brittleness prior to cold rolling and to modify the microstructure.

Process following the Recrystallization Annealing are mainly the mechanical descaling and the Pickling to fully eliminate scale and Si oxide underneath the scale.

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Overview

Tenova, with its over 40 years of experience, is the only company with the competence and knowledge, of the entire multi-stage thermal process chain, which is required for the production of grain-oriented electrical steel strip.

The hot rolled strips (NGO and GO) are initially side trimmed through a rotating turret trimmer,annealed in a continuous process to eliminate brittleness prior to cold rolling and to modify the microstructure. The annealing process is followed by a controlled cooling stage with a cooling rate, which may range from 5 to 80 K/s depending on the steel grade required. This process is usually carried out in a nitrogen atmosphere to protect the strip surface.

Process following the recrystallization Annealing are:

the Scale Breaking, or more frequently Hi Si grades a Shot Blasting section to partially eliminate the scale from the strip surface, a pre rinsing section to pre-heat and pre-wet the strip surface, the pickling and accurate rinsing section to fully eliminate scale and Si oxide underneath the scale.

All the mechanical equipment and strip preheaters designed to thread brittle strips especially before the Annealing Furnace.

Terminal Equipment and Process Section present specialties like:

Pay Off Reels provided with double expansion mandrels, compact Down cut Shears with lateral extraction for simplified blade maintenance

High precision Rotating Turret Side Trimmer-Scrap chopper unit

Low Inertia and low strip stress loopers; Pre Rinse section, operated with hot water for: residual scale powder removal, strip pre-heating Improving significantly the pickling efficiency.

High turbulence shallow pickling tanks Special multiple cascade rinsing section with controlled acidity for high surface quality Side trimmer with rotating turrets.
Si red ( Silica reduction plant) to continuously remove the excess of Si sludges from the recirculating tank through sedimentation and press filter; piping and heat exchanger washing plant for simplified maintenance.

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Related Solutions

HPH® Bell-Type Annealing Furnace for Silicon 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

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India

Prasanta Saha

Prasanta Saha

Director Sales, Tenova Technologies Pvt. Ltd.

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China

Peizhong Wang

Peizhong Wang

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

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Americas

Tom Walsh

Tom Walsh

Vice President Sales and Technology, Tenova Inc.

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RoW

Sascha Bothen

Sascha Bothen

Senior Vice President Sales & Marketing, Tenova LOI Thermprocess

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Modernization, Service & Spare Parts

Marc Reynaert

Marc Reynaert

Head of Revamp & Modernization, Tenova LOI Thermprocess

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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.

 

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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 04651530968.
Share Capital € 18.443.700

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