Tags Dung Quat Economic Zone Authority (DEZA) Hoa Phat to build iron and steel production complex Tuesday, Feb 07, 2017 The Dung Quat Economic Zone Authority (DEZA) and Quang Ngai Industrial Park Management Board on Monday granted an investment certificate for the Hoa Phat Dung Quat iron and steel production complex to the Hoa Phat Group.