The grandson of Korea Zinc founder Choi Ki-ho, who was promoted to chairman this week, is expected to accelerate his efforts for the general non-ferrous metal smelter s independence from its largest shareholder, Young Poong, which is under the control of the family members of another of Korea Zinc s founders, Chang Byung-hee, according to industry officials, Wednesday. The smelting company said Tuesday that its board members appointed Choi Yun-beom as the chairman to replace his uncle, Choi Chang-keun, who became the honorary chairman.