Study on Preparation and Properties of Industrial Lignin Metallized Pellets for Ironmaking

The pulp and paper industry produces a large amount of industrial lignin as biomass waste every year and it is not effectively utilized, resulting in a waste of resources. In this paper, by exploring the influencing factors of the strength of industrial lignin green pellets and metallized pellets, it is expected that industrial lignin can be effectively applied to the ironmaking industry to achieve the purpose of energy saving and emission reduction. The results show that when the molar ratio of carbon to oxygen is 1.2, the falling strength and compressive strength of industrial lignin pellets can reach 6.8 times/0.5 m and 26.8 N, respectively. When the calcination temperature is 1100 °C, the compressive strength of industrial lignin metallized pellets reaches 78.5 N; when the roasting time is 60 min, the compressive strength of the industrial lignin metallized pellets is 865 N, and the metallization rate is 99.72%. It can meet the requirements of industrial production.