Method for pellet formation using steel-making slurry

Abstract

The invention relates to a pelletizing method using sludge of steel production and belongs to pelletizing technology in metallurgy field. The method comprises: adjusting sludge concentration to 10-40%, adding 3-10% (weight percentage) sludge in mixture of iron ore powder and bentonite, continuously spraying it in palletizing disk, The advantage of the method : material sphericity is improved greatly. Bentonite usage can reduce greatly in mixture, which promote the pelletizing quality. Pelletizing disk don't take on sandification. Aqueous sludge can minimize the extra water. The enterprise has electric furnace, open-hearth furnace, revolving furnace and pelletizing line can use the method.

Description

technical field

[0001] The invention relates to the production technology of producing pellets in the field of metallurgical industry. Background technique

[0002] At present, the production of pellets is to mix iron ore powder and bentonite, add water and roll in the pelletizing disc to make green pellets (see the textbook "Iron Oxidation Oxidation" published by "Sintering Pellet Research Institute of Central South University" in February 2001). The basic principle, process and equipment of pelletizing"P.1). The disadvantage of this traditional method is that the amount of bentonite is large and the amount of added water is large. Green balls enter steelmaking after roasting and ironmaking. During the steelmaking process, a large amount of sludge slurry is produced. This steelmaking sludge slurry is the waste generated during the steelmaking process. It has good cohesiveness and contains Certain iron and CaO, high water content, fine particle size of dry ash. How to dea...