EAF SHAFT
MORE THAN 25 YEARS OF EXPERIENCEIN SCRAP PREHEATING
Shaft furnace technology was pioneered by our company
in the late 1980s in response to the market challenge
for minimum conversion costs, maximized output, andenvironmental compliance.

FEATURES

Through the utilization of the furnace off-gas during theheat cycle, scrap can be preheated to approximately 600°C, on average, prior to final melting in the furnace vessel.
This means considerable energy and cost savings with asubstantial reduction in tap-to-tap times. Furnaces areavailable as either single-shaft or double-shaft types. The
most efficient design is the so-called fingershaft furnace,
which employs a unique scrap retaining system with fingers
to preheat 100% of the charge. Thanks to EAF Shaft andEAF Fingershaft, any existing EAF with a heat size of over
60 tons can be upgraded to a high-performance shaft
furnace with only minor modifications to the existingequipment.

• Flexible charging of DRI, HBI, hot metal, and pig iron

• Up to 100% scrap preheating• Ideal conditions for maximum energy recovery andapplication of postcombustion• Highest output, even with weak power grids• Efficient off-gas treatment that satisfies all regulations• Shaft moves laterally for easy maintenanceprimetals.com

80-t fingershaft furnace in Zhangjiagang, China

SELECTED REFERENCES• Severstal AG, Russia

MAIN BENEFITS• Diler Iron & Steel Co., Turkey• Stahl Gerlafingen – Beltrame Group, Switzerland• Fushun Special Steel, China• Nervacero S.A. – Celsa Group, Spain• NatSteel – Tata Group, Singapore• Zhangjiagang Steel – Shagang Group, China• Low EAF conversion costs• Tap-to-tap time of only about 35 minutes• Up to 100 kWh/t electrical energy savings• Approximately 40% reduction in flicker factor• Up to 30% lower electrode consumption• Up to 1% increase in metallic yield• Up to 25% less dust emissions• Up to 40% increase in productivity• Short ROI

Primetals Technologies
Germany GmbHA joint venture of Mitsubishi Heavy
Industries and partners
Reithallenstr. 1 | 77731 WillstaettLegelshurst | Germany
primetals.com
Order No. T02-0-N361-L4-P-V2-EN
Printed in Linz | © 02.2020

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of performance based on estimates and assumptions which have not been verified. It is no representation, does not constitute and/or evidence a contract or an offer to enter into a contract to any extent and is not binding upon the parties. Any obligation to provide
and/or demonstrate respective characteristics shall only exist if expressly agreed in the terms of the contract. These estimatesand assumptions have to be analyzed on a case-to-case basis and might change as a result of further product development.
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