Třinecké Železárny awards blast furnace hearth reline to Paul Wurth

Třinecké Železárny, a.s., an integrated steel works located in the very North-East of the Czech Republic in the town of Třinec, produces added value products such rails, sections, steel wire and bar, seamless tubes as well as special steel for tools and springs. The whole production bases on an ironmaking plant consisting of two blast furnaces of nearly equal design, with a joint capacity of just a little bit more than 2 million tons of hot metal per year.

In late spring 2019, Třinecké Železarny has awarded a contract to the Paul Wurth group for the complete reline of No.6 blast furnace’s hearth.

The project includes basic and detail engineering for the new hearth and the supply of all refractory materials. On top of the refractory engineering and deliveries, Paul Wurth will be responsible for all site activities such as salamander tapping, removal of residual hot solid material, demolition of the old hearth, assembly of the new hearth as well as the corresponding site management and supervision.

Already in the offer phase, Paul Wurth has advised Třinecké Železárny over a longer period on possible campaign extension measures and reline techniques. This included assessment of the status of No. 6 BF’s hearth by application of multipoint thermocouple sensor probes (MTP probes) installed in two steps in 2017 and 2018.

The upcoming reline of the hearth of BF6 is a result of trustful consultation and partnership between Paul Wurth and the customer in choosing the appropriate reline strategy for this ironmaking plant. In this context, it is also worth to look back into history: the currently installed hearth of this furnace has been designed by engineers of DIDIER/DME – today known as Paul Wurth Deutschland GmbH in Wiesbaden. This hearth has been in operation for more than 20 years by now and will reach a campaign of 22 years when the reline will start in 2021.

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