Kumar Mangalam Birla, Chairman of Aditya Birla Group, is making sure he no longer focuses on business which are not helping him realise his dreams. Grasim on Tuesday sold its sponge iron business, Vikram Ispat, to Welspun Group for Rs 1030 crore. While commenting on the development Ravi Kastia, Biz Head-Sponge Iron, Aditya Birla Group, said it is not the company’s core business.