Method for producing an agglomerate made of fine material containing metal oxide for use as a blast furnace feed material

摘要

The invention relates to a method for producing an agglomerate, which is used as a blast furnace feed material, by mixing a fine material containing metal and/or metal oxide, a mineral binder, which comprises a mineral raw material and a lime-based material, and optionally other additives to form a mass and solidifying the mass to form an agglomerate, wherein a raw material comprising a silicon oxide fraction of at least 40 wt %, a fine grain fraction of less than 4 μm of at least 20 wt %, and a grain size fraction of less than 1 μm of at least 10 wt % is used as the mineral raw material. The invention further relates to a blast furnace feed material that can be produced by means of the method according to the invention, and to a pre-mixture for producing the blast furnace feed material.

主权项

1. Method for producing an agglomerate, having a mass humidity that can be adjusted, which is used as a blast furnace feedstock, by mixing metal- and/or metal oxide containing fines, comprising a proportion of intermediate grain sizes between about 0.2 mm to 0.7 mm of more than 30% wt., a mineral binder comprising a mineral raw material and a lime-based material to form a mass and consolidating the mass to form an agglomerate, by a sintering process, characterized in that the mineral raw material contains a clay mineral and comprises a silicon oxide proportion of at least 40 wt. % and a finest grain proportion of less than 4 μm of at least 20 wt. %, and a grain size proportion of less than 1 μm of at least 10 wt. %.