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Principles of Steel-making

Principles of Steel-making

Principal concepts of physical chemistry useful in steel making are; System: – It is a group of bodies which interact with each other and can be isolated, either mentally or physically, from the surroundings Ex. Metal-slag systems. A system composed of a number of portions, possessing …
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Blast Furnace Charge (Raw Materials for Steel-making)

Blast Furnace Charge (Raw Materials for Steel-making)

1. QUALITY OF CHARGE MATERIAL: A blast furnace charge consists of coke, ore or sinter, and limestone. These materials must be in lumps of a certain size (40-60 mm). Larger lumps prolong the process of reduction and fluxing. Smaller lumps block the flue-gas passages and prevent …
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Preparation of Ores

Preparation of Ores

1. Ore Crushing: Ore comes from mines in lumps up to 1 m. across. The lumps are reduced in size in several stages: Primary crushing: – Here they break down to 100-200 mm. Secondary crushing: – Here they break down to10- 50 mm. Fine crushing :- …
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Blast Furnace Process

Blast Furnace Process

  Burden materials charged to the top of the blast furnace descend slowly. The materials stay in the furnace 4-6 hr. Gases evolving in coke burning near the tuyeres flow against the descending charge at a great velocity throughout the cross section of the furnace. The …
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