By Alessandro Torello and Alex MacDonald 
 

BRUSSELS--ArcelorMittal (MT), the world's largest steelmaker, rebuffed Tuesday a call by a top European Union policymaker to postpone the closure of plants in Europe until the EU publishes a strategy to revitalize the sector.

"It is not possible for ArcelorMittal to delay the implementation of our proposed restructuring plans," a spokesman for the company said. "The economic situation in Europe is extremely fragile and this has substantially reduced steel demand. Failing to take action in response to this will only serve to weaken the company in Europe, thereby threatening the viability of other plants," the spokesman explained.

He was responding to an appeal by Antonio Tajani--the EU industry commissioner who is working on an EU-wide revival plan for the industry--to wait until such plan is released, before the summer.

Steel demand in Europe has fallen by nearly 30% since 2007, a sign that the sector has been heavily hit by the continent's debt crisis, as some of its main customers--the automotive and construction industries-- have been the worst hit.

ArcelorMittal has responded to weak demand and excess production capacity by temporarily idling blast furnaces, and announcing the permanent closure or mothballing of certain loss-making operations in Belgium and France.

"I want to ask ArcelorMittal to postpone the decision to close the plants at least until the approval of the text of the European Commission's action plan, because I am convinced that we can give an answer in trying to defend the steel industry in Europe," Mr. Tajani said earlier Tuesday.

Write to Alessandro Torello at alessandro.torello@dowjones.com and Alex MacDonald at alex.macdonald@dowjones.com

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