When reporters arrived at Zixing Fengyue Environmental Protection Technology Co., Ltd. on Oct. 9, 2014, workers were busy in handling the production of low grade multi-metals comprehensive utilization project. It was learned that 600million yuan was fulfilled in 13 months for this key project of Chenzhou city by using the engineering of oxygen-enriched side-blow. It was the first case which was handled successfully one-time among all other similar enterprises.