IRON MAKING,STEEL MAKING AND STEEL ROLLING TECHNOLOGIES

What would it take for civilization on Earth to collapse in an instant? A nuclear explosion? A raging and incurable worldwide epidemic? A surprise black hole capable of swallowing the sun? Possibly. Yet, what if something seemingly less catastrophic forced civilization to an end? What if steel became nonexistent? The effects wouldn’t seem to be as cataclysmic as the disappearance of the sun; still, we would suffer devastating corollaries if steel was absent from our planet. Civilization would collapse—and not just literally.

Steel is influential in more aspects of our lives than we are aware of. This material is used across the globe for a variety of purposes due to its functionality, adaptability, machinability and strength. Mankind would not exist successfully today if it weren’t for the development of steel. Steel is an instrumental material in the international progression of infrastructure, economy, transportation, sustainability, health and entertainment. In looking at these necessary components of civilization, we offer a list of six reasons, in a three-part blog series, to explain why society would collapse without the world’s most common alloy.

Steel is the material that makes infrastructure, construction and transportation possible. Without steel, we’d have no skyscrapers to work in, no cars to get us there and no planes to fly around in. Take a look at reasons one and two in our list of why life would fall apart without such a material.

Steel is made through following route:

1. Iron Making

2. Steel Making

Steel is further casted in the form of billets,blooms,ingots and slab form and rolled further to form following:

1. Long Products : Angles,Channels,Beams,Rails,Rebars,Wire rods

2. Flat Products : Plates,sheets & strips





Friday, July 19, 2013

AGGLOMERATION-2

Sinter plants:

Process description:
By sintering, the pelletisation of fine-grained, smeltable ores, iron ore in particular, to compact lumps by heating nearly to the melting or softening point is understood. Melting tendencies at the grain boundaries lead to a caking of the material.Before the sintering, the various substances are first mixed and, if desired, granulated.The iron ores are agglomerated on conveyor sinter installations, the conveyor belts
consist of a large number of wagons. These wagons that have been linked up as an endless conveyor belt which can be as big as 4 m in width and 100 m in length. The fine ore to be sintered is moistened and fed on to the circulating grid together with coke slack and additions such as limestone, quick lime, olivine or dolomite. Burners above a heat-resistant grate belt heat the material to the required temperature (1100-1200 °C). This causes the fuel in the mixture to be ignited. The carbon burns with the aid of the air
sucked through the grid into the mixture, resulting in the flame front being moved through the sintering bed. The sintering processes are completed once the flame front has passed through the entire mixed layer and all fuel has been burnt.
 
Chlorine compounds can enter into the sinter installation by means of the additive cokes slack as well by the ore from its natural chloride contents. Furthermore, returned materials such as certain filter particles, scale and sludges from waste water treatment, which are added to the materials to be sintered, which can also increase the chlorine content of the substances used. This is reflected in the waste gases from sinter
installations which contain inorganic gaseous chlorine compounds.
 
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