This is a method for producing cold-bonded pellets for direct reduction竖炉 and blast furnaces, involving the addition of iron ore fines or iron-containing dust with particle sizes less than 8 mm to a binder, mixing them uniformly, and then forming blocks under a pressure of 20 to 30 MPa. The compressed green pellets are then processed at temperatures ranging from 100 to 300...In 30 to 60 minutes at °C, the required cold agglomerated balls are achieved.

Historically, high-temperature sintering or roasting pelletizing methods were complex in process and equipment, required significant capital investment and long construction periods, and had high energy consumption and severe pollution. Consequently, the cold bond pelletizing method, which does not undergo high-temperature roasting, offers advantages such as simple process and equipment, low energy consumption, lower investment, shorter construction cycles, and better environmental conditions. As a result, cold bond pelletizing is increasingly valued as a technology for making iron ore concentrate pellets. The performance of cold bond pellets primarily depends on the binder used, and currently, due to less than ideal binders, these pellets have lower mechanical strength, particularly in high-temperature metallurgical properties like thermal strength, compared to natural lumps, sintered or oxidized pellets.

This binder utilizes an enhanced composite binder formula, overcoming the significant drawbacks of using water glass alone. The resulting cold-set agglomerates exhibit good mechanical strength and high-temperature metallurgical properties, meeting the requirements of direct reduction shaft furnaces and blast furnace production processes.