Net profits at his ArcelorMittal, world’s largest steel-maker, are up 18-fold to $2.9 billion in 2010 due to recovery in steel demand and higher margins. Group spun off its stainless steel unit into Aperam, a new listed company, and also acquired Canadian miner Baffinland Iron Mines Corporation. It has funded a 377-foot sculpture called ArcelorMittal...