Steel Mills
AK Steel Ashland Works Furnace Shutdown
Written by Sandy Williams
July 31, 2014
AK Steel has shut down the blast furnace at Ashland Works for the second time this year. A “hearth chill” incident occurred last week (described as excess water in the furnace) according to AK Steel officials during the company’s earnings conference call Wednesday, and further maintenance was anticipated.
In an email to SMU, Mike Wallner, General Manager, Communications and Public Relations wrote:
“AK Steel recently experienced an unplanned stoppage at its Ashland Works (KY) blast furnace. The company is working to remedy the situation and minimize any potential impact on its customers.”
If the outage is because of a hearth chill it could be a serious problem for AK Steel. A research article by Ron van Oudenallen, Egenolf van Stein Callenfels, et al., describes a hearth chill as follows:
“A chilled blast furnace is one of the most serious disruptions in an integrated steel plant, as it might take weeks to bring the furnace back to normal production. During a hearth chill, liquids cannot be tapped since the temperature in the lower part of the furnace has become too low. The connection between the taphole and tuyeres has been lost, primarily owing to solidification of slag. This solidified slag obstructs the flow of liquids into the hearth. If a chill is very severe, the remaining hot metal in the hearth may start solidifying as well. Blast Furnace chills can be minor (connection lost, but sufficient heat in the hearth) to very severe (connection lost and all hearth contents solidified).”
Sandy Williams
Read more from Sandy WilliamsLatest in Steel Mills
USW seeks clarity on plans for Granite City Works
The United Steelworkers union has asked U.S. Steel to elaborate on its Granite City Works plans following reports that the steelmaker is ending processing at the facility.
Nucor maintains plate prices, opens October order book
Nucor aims to keep plate prices flat for a seventh straight month with the opening of its October order book.
ArcelorMittal Mexico to import from sister mills as it works to resume DRI production
ArcelorMittal has partially restarted operations at its direct reduction plant in Lazaro Cardenas, Michoacan. An explosion on Aug. 18 rocked the massive steelworks on Mexico’s Pacific coast, impacting production of direct-reduced iron (DRI).
Fall maintenance outages are coming in hot
Labor Day has passed, the sun is starting to set a little earlier each day, and cooler weather has begun to find its way down to many of us across North America. And you know what that means for the steel industry… Fall maintenance outages!
AISI: Domestic steel production ticks up
US raw steel production ticked up in the week ending on Sept. 6 after a decrease the week before, according to the most recent data from the American Iron and Steel Institute (AISI).