Steel Production Process

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Steel production(p7)
Steel manufacturing has many different processes and can be a very complex to manufacture. Firstly the iron ore needs to be mined out of the ground before steel production can begin.From this process of mining the steel can then start it production process and begin the vital three stages needed to produce steel. Firstly a very intensive heat source needs to be produced to melt the iron ore. After this stage the intensive heat generated in the furnace is used to melt the iron ore. Then at its third stage the molten iron is used to produce steel this process will almost always take place at the same facility because of the intense heating and continuous production line like process.
Global steel production is very dependent on coal over 70% of steel produced today will use coal.
Metallurgical coal or coking coal is a very vital ingredient in the steel making process. In the production process of the worlds steel 2010 saw around 1.4 billion tons being manufactured and around 721 million tonnes of coking coal had to be used in the production.
Coking coal is a process that is used to help drive away impurities and leave almost pure carbon based material. The properties of coking coal cause the coal to soften, liquefy and then resolidify into a hard and porous lumps when heated in the absence of air. Coking must also have very low sulphur and phosphorous content this is due to the fact that almost all metallurgical coal is used in coke ovens. At this point the coking process undertakes being heated to around 1000 - 1100⁰C this has to be in the absents of oxygen to drive off any volatile compounds (Pyrolysis).
The coking process can take a very long time in the ovens timings are normally around 12-36 hours. Once the...

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...ture is as pure as possible to perform the task required as having the wrong formula will make the life of the material alter and quality of the strength.
Protection of metallic zinc by either hot-dip galvanizing or electroplating, Zinc is traditionally used because it is cheap, adheres well to steel, and provides cathodic protection to the steel surface in case of damage of the zinc layer. In more corrosive environments (such as salt water), cadmium plating is preferred. Galvanization often fails at seams, holes, and joints where there are gaps in the coating. In these cases, the coating still provides some partial cathodic protection to iron, by acting as a galvanic anode and corroding itself instead of the underlying protected metal. The protective zinc layer is consumed by this action, and thus galvanization provides protection only for a limited period of time.

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