Kolkata-based B D Castings and Bishan Dayal Goyal & Sons, part of the steelmaking Goyal group, is in discussions with financial institutions for private placement. Kailash Chand Goyal, one of the promoters, said that the company was looking to raise around Rs 150-200 crore through private placement. At present closely held, dilution of promoters stake would be to the tune of 25-30 per cent in each of the…