Effect of Plastic-Coal Mixed Carbonization Reducing Agent on Direct Reduction Behavior of Carbon-Bearing Pellets

摘要

In order to solve the pollution caused by waste plastics and improve the reduction rate of carbon-bearing pellets, a new idea of co-carbonization of plastics with different kinds of coal was put forward in order to achieve the purpose of clean treatment of waste plastics and cost-saving in iron and steel industry. Basic research on the application of this new type of mixed carbonization reductant has been carried out. Effects of reduction temperature, types of reducing agents, types of iron ores and batching methods on the metallization degrees, and morphologies of reduced carbon-bearing pellets were systematically studied. The results show that when the raw material is magnetite iron concentrate, the addition of mixed carbonization reductant carbonized by anthracite and PE plastics can improve the reduction rate of carbon-bearing pellets, but it will cause a certain degree of expansion.