Recycling of manganese secondary raw material via cold-bond

ABSTRACT:
Large quantities of fines were produced during the shipping,
transportation, handling and storage of manganese ore sinter imported
from different countries to Sinai Company for ferromanganese
production. These fines are generally considered as valuable secondary
raw materials. Hence, they have a potential to be recycled back to the
submerged arc furnace after having been agglomerated. For agglomerates
to be considered as feed materials for submerged arc furnace they must
have sufficient room temperature strength. Cold-bonded pelletization
process offers an economically attractive and environmentally viable
method for achieving this. Ordinary Portland cement was used in this
investigation for the purpose of producing a suitable cold-bonded pellet
from such fines. In this investigation, the effect of adding different
percentages of Portland cement on the mechanical properties of both
green and pellet dried at room temperature for 1, 3, 7, 14, and 28 days of
normal curing were studied. The results revealed that, although the
compressive strength of green pellets improved with the increase of the
amount of cement added, retardation in pellet drop strength was reported.