- In 1990 The founder of the company started refractory material business.
- In 1998 The founder of the company founded the Micun Town Xianglong Melting Factory.
- In 2003 Tnvested CNY 2 million to build two 150-ton downdraft kiln production lines.
- In 2004 Changed the company name “Longxiang Rongliao Factory”into “Xinmi City Longxiang Melting Co., Ltd.” for better development.
- In 2006 4 sets of 150 tons downdraft kilns constructed and put into production.
- In 2009 Changed its name to Zhengzhou Yinintaii Metallurgical Materials Co., Ltd.
- In 2011 Established an environmental-friendly ball-shape production line with annual output of 10,000 tons.
- In 2012 Enlarged the factory by building the 4000 m2 workshop.
- In 2013 The construction of the 60m*2.5mφ rotary kiln production line with natural gas built and put into production. The production capacity reached to 50,000 tons / year.
- In 2016 Gained ISO9001 certificate.
- In 2017 New energy and environmental protection automatic production line was constructed and put into production.
- In 2018 A new pre-melting production line was built and put into production, with an annual output of 15,000 tons of pre-melted refining slag; and expanded the factory by 5,000 m2.
- In 2019 Pre-melting production line was constructed and put into production.
