Printer Friendly

Cokeless cupola furnace reduces energy consumption, emissions.

A cokeless cupola turnace used in several European metalcasting facilities now is being introduced in the U.S. The furnace, by Duker GmbH and Co., Karlstadt, Germany, has been reported to use less energy and emit less carbon dioxide and sulphur dioxide than typical coke-fired cupola furnaces. The furnace is best suited for producing ductile iron.

The energy source for cokeless cupola furnaces is natural gas, so neither an addition of sulphur nor desulphurization is necessary. The heating operation begins after the ceramic bedding of the furnace is fed onto a water-cooled grate. The empty furnace is preheated for 45 minutes and then loaded with metallic charge and slag-forming constituents. The hot flue of the burner, which runs on natural gas, flows through and overheats the layer of ceramic spheres, ensuring the charge column is thoroughly preheated. Afterward, the exhaust gas is cooled in a gas/air exchanger and cleaned through a dry filter. The charge material melts, overheats while in contact with the ceramic bedding and drips into the melting batch. The slag and iron are separated in a siphon.

[ILLUSTRATIONS OMITTED]

The melting process begins while the furnace is being filled, so the first iron pours out of the siphon into the electrically heated superheater in 15 minutes. The desired iron temperature is regulated electronically, and the composition is adjusted by adding the appropriate alloy. Less slag results from melting with a gas-fired furnace, and the first slag does not flow until two hours after the melting process has begun. The slag can harden in slag pots or be granulated.

The cokeless cupola furnace has shown reductions of energy consumption and carbon dioxide and sulphur dioxide expulsion in metalcasting facilities in Europe. Typical applications of the cokeless cupola furnace consume 48-52 cu.m gas per of natural gas per ton to melt the material and 104 KWh of electricity per ton for superheating and auxiliary equipment.

Visit www.dueker.de for more information

[ILLUSTRATION OMITTED]
COPYRIGHT 2007 American Foundry Society, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2007, Gale Group. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:New Product
Publication:Modern Casting
Date:Dec 1, 2007
Words:327
Previous Article:CMI course schedule.
Next Article:Bronze casting company takes charge of production tracking.
Topics:


Related Articles
Energy efficiency, fuel switching, and environmental emissions: the case of high efficiency furnaces.
Wire injection for ductile iron lends flexibility to Gunite Corp.
Understanding Melting operations. (Melting Methods & Materials).
Optimizing your cupola operation.
Strategizing energy consumption: EPA outlines viable energy strategies for the metalcasting industry in a new report.
Metalcasting's carbon footprint: lawmakers are talking seriously about reducing greenhouse gases, but what does that mean for metalcasters?
New baghouse system boosts Acme's cupola efficiency.
Paying green to go green: by following a few practical tips, your facility can begin the process of reducing greenhouse gas emissions. AFS Technical...

Terms of use | Privacy policy | Copyright © 2020 Farlex, Inc. | Feedback | For webmasters