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Henan Zhongyuan Gold Smelter limited liability company in recent years to increase R & D investment, and actively guide and encourage the staff to carry out technical research and development and technological transformation, focus on the company's production, the development direction of fit company, at the same time improve the process optimization and carried out a series of research projects.faHenan Zhongyuan Gold Smelter limited liability company in recent years to increase R & D investment, and actively guide and encourage the staff to carry out technical research and development and technological transformation, focus on the company's production, the development direction of fit company, at the same time improve the process optimization and carried out a series of research projects.fa