Agglomerates containing olivine
AssigneeInternational Minerals & Chemical Corp.
InventorsFrank H. Ellenbaum, Richard Ciesco
Life of this patent
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Abstract
A process for the reduction of iron oxides to produce molten iron in which olivine is introduced into a blast furnace in addition to iron oxide bearing materials and in which there is a high content of alkali metal oxides in the materials charged into the furnace, resulting in minimizing or preventing "scaffolding" and improving the operation of the furnace. The disclosure further includes improvements in which olivine is mixed with iron bearing materials or with coke and such mixture is formed into agglomerates having improved properties and in which such agglomerates are charged into the furnace.
Claims12
An agglomerate consisting essentially of finely divided iron ore and olivine in an amount of about 0.5% to 10% and characterized by (a) a size distribution wherein 97.1% or more of the pellets are retained by a 3/8" screen, (b) greater resistance to disintegration as measured by 2.64% of fines or less resulting from handling, (c) a bulk density of 132.5 lb/ft.sup.3 or less, and (d) a porosity of 25.22% or more of voids.
A pellet consisting essentially of finely divided iron ore and olivine in an amount of about 0.5% to 10% and characterized by a size distribution wherein about 97% or more of the pellets are retained by a 3/8" screen, (b) greater resistance to disintegration as measured by about 2.6% of fines or less resulting from handling and (c) a bulk density of 132.5 lb/ft.sup.3 or less.
Dependencies are inferred from the claim text.