Process of using olivine in a blast furnace
First Claim
1. In a process for producing iron in a blast furnace wherein charge materials including iron oxide bearing materials, calcium carbonate and coke, are charged into the blast furnace to form within the furnace layers of iron oxide bearing materials, calcium carbonate and coke and wherein air is passed upwardly through said layers, and said coke is burned to heat said materials and reduce iron oxides to produce molten iron, said charge materials having an alkali metal oxide content exceeding 1 pound per ton of molten iron produced, the improvement which includes charging into said blast furnace in addition to said iron oxide materials from 0.25 to 5 percent of olivine, said percentage being based on the weight of said iron oxide materials.
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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 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 blast furnace. The disclosure also includes sinters and briquettes which contain olivine and processes of preparing them, and processes for furnace operation including the charging of such sinters or briquettes.
100 Citations
6 Claims
- 1. In a process for producing iron in a blast furnace wherein charge materials including iron oxide bearing materials, calcium carbonate and coke, are charged into the blast furnace to form within the furnace layers of iron oxide bearing materials, calcium carbonate and coke and wherein air is passed upwardly through said layers, and said coke is burned to heat said materials and reduce iron oxides to produce molten iron, said charge materials having an alkali metal oxide content exceeding 1 pound per ton of molten iron produced, the improvement which includes charging into said blast furnace in addition to said iron oxide materials from 0.25 to 5 percent of olivine, said percentage being based on the weight of said iron oxide materials.
Specification