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K MELTING SHOP<br />
Internet-PDF from “Casting Plant & Technology “ 02 / 2012, pages 22 – 23<br />
© Giesserei-Verlag, Düsseldorf<br />
Weichai Power – first iron (Photos: Küttner)<br />
Author: Dipl.-Ing. Hans-Jaan Rachner, Küttner GmbH & Co. KG, Essen<br />
<strong>State</strong>-<strong>of</strong>-<strong>the</strong>-<strong>art</strong> <strong>cupolas</strong> <strong>for</strong> <strong>China</strong><br />
German plant specialist Küttner from Essen pr<strong>of</strong>its from a large demand <strong>for</strong> cupola furnaces<br />
from <strong>China</strong>. All installed plants have been brought up to <strong>the</strong> latest technical standard. The<br />
plants are, <strong>for</strong> example, equipped with heat recovery devices and <strong>the</strong> latest <strong>of</strong>f-gas filter technology<br />
In May 2010 Weichai Power Co. Ltd.,<br />
Weifang/<strong>China</strong>, ordered a 35 t/h hotblast<br />
water-cooled long-campaign cupola<br />
furnace from Küttner GmbH &<br />
Co. KG, Essen/Germany.<br />
The furnace system could be st<strong>art</strong>ed<br />
very smoothly as scheduled in August<br />
2011 within only 15 month after<br />
signing <strong>the</strong> contract.<br />
Since <strong>the</strong>n <strong>the</strong> system runs without<br />
failure produ cing HT250 and<br />
HT300 iron grades <strong>for</strong> <strong>the</strong> fabrication<br />
<strong>of</strong> high precision castings like diesel<br />
engine cylinder blocks and heads.<br />
These products are used in medium<br />
Casting Plant & Technology 2/2012<br />
and heavy duty vehicles as well as in<br />
power generators.<br />
Latest <strong>of</strong>f-gas filter technology<br />
The cupola system is equipped with a<br />
heat recovery device serving <strong>the</strong> hot<br />
blast generation as well as with state<strong>of</strong>-<strong>the</strong>-<strong>art</strong><br />
<strong>of</strong>f-gas filter technology<br />
which is in line with <strong>the</strong> latest international<br />
environmental standards.<br />
The furnace is equipped with Oxyjet<br />
lances that inject oxygen at supersonic<br />
gas speed to assure centre<br />
melting and quick iron temperature<br />
control. The charging system is de-<br />
Cupola furnace manufactured by<br />
Küttner at Weichai Power, Weifang/<br />
<strong>China</strong>
Cupola top charging<br />
Coke bed measurement<br />
signed <strong>for</strong> a reliable heavy duty operation<br />
and assures precise raw material<br />
dosing and feeding.<br />
Use <strong>of</strong> recovered heat<br />
Recently fur<strong>the</strong>r cupola furnace systems<br />
have been ordered also from<br />
FAW Foundry Co. Ltd., Jilin/<strong>China</strong>,<br />
and Chongqing Machinery & Electronics<br />
Holding Corp. Ltd., Chongqing/<br />
<strong>China</strong>.<br />
FAW Foundry Co. has decided to use<br />
<strong>the</strong> recovered heat <strong>of</strong> <strong>the</strong> cupola furnace<br />
<strong>for</strong> several applications like <strong>for</strong><br />
heating <strong>of</strong> six core drying furnaces,<br />
heating <strong>of</strong> a sand storage and <strong>of</strong> shower<br />
water.<br />
The cupola plant design <strong>for</strong> Chongqing<br />
MEC will consider also metallurgical<br />
options to a djust <strong>the</strong> carbon<br />
content between 2.8 and 3.8 mass -%<br />
and to remove sulphur <strong>for</strong> <strong>the</strong> production<br />
<strong>of</strong> no dular iron. Both fur na ces<br />
will st<strong>art</strong> <strong>the</strong>ir operation in 2013.<br />
www.kuettner.com<br />
Casting Plant & Technology 2/2012
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