Metal oxide-containing green pellet for reducing furnace,...

Details Metal oxide-containing green pellet for reducing furnace,... Metal oxide-containing green pellet for reducing furnace,...

2001-10-30

2010-10-19

Wyszomierski, George (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Processes

Consolidating metalliferous material by agglomerating,...

C075S484000

Reexamination Certificate

active

07815710

ABSTRACT:
The present invention provides a method and facility for preventing crumbling and powderization of green pellets when producing high strength green pellets using a powder feedstock and using the pellets in a rotary hearth reducing furnace and for efficiently reducing the same. It comprises kneading by a kneader5a feedstock of a powder of a fine particle size (20 to 80 wt % having size of not more than 10 μm) including a metal oxide and carbon-bearing powder fed from a feed storage tank1and producing green pellets by a pan type pelletized7. The green pellets are screened by a pellet screen9, then dried by a pellet dryer11and reduced by firing in a rotary hearth reducing furnace13. At that time, the green pellets are continuously conveyed to prevent crumbling.

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Xia et al. “Recent Research on the Pyrometallurgical and Hydrometallurgical Treatment of Electric Arc Furnace Flue Dust” Intertech 10th International Converence on Steel Mill Wastes By Products, 1997, pp. 138-144.
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