What is the process of blast furnace?
Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. Rapid combustion is maintained by the current of air under pressure.
What is the product obtained from blast furnace?
Blast furnace produces Hot metal (Liquid Iron) using Iron ore, Coke, Sinter, Pellets and fluxes such as Lime-stone, Pyroxenite, Quartzite reacting with oxygen from pre heated air.
For which process of metal extraction blast furnace is used?
The blast furnace Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as haematite contain iron(III) oxide, Fe 2O 3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
What are the refining reactions in steel making?
In steelmaking the impurities in hot metal like carbon, silicon, manganese, phosphorus and sulphur are removed through oxidation and slag formation so as to produce steel of desired chemistry and cleanliness. For this purpose oxygen is supplied and slag of desired chemistry is formed.
What are the aims of primary steel making?
Primary steelmaking consists of refining of hot metal or scrap +hot metal to steel in a) converter and b) Electric furnace. The objective is to refine hot metal to the nearly desired chemistry.
What are impurities in steel called?
Limiting dissolved gases such as nitrogen and oxygen and entrained impurities (termed “inclusions”) in the steel is also important to ensure the quality of the products cast from the liquid steel. Steelmaking has existed for millennia, but it was not commercialized on a massive scale until the late 14th century.
Why is iron used in steel?
Pure iron is too soft and reactive to be of much real use, so most of the “iron” we tend to use for everyday purposes is actually in the form of iron alloys: iron mixed with other elements (especially carbon) to make stronger, more resilient forms of the metal including steel.
What is the strongest metal against bullets?
Tungsten: The perfect metal for bullets and missiles.
Is a diamond bullet proof?
It doesn’t seem unreasonable to wonder whether diamonds are bulletproof, since diamond is the world’s hardest natural material. Diamonds are not however bulletproof in general, as while they are hard, they are not particularly tough and their brittleness will cause them to shatter when struck by a bullet.
Is aluminum as strong as steel?
Aluminum is about one-third the weight of steel, meaning parts can be made thicker and stronger while still reducing weight in vehicles and other applications. Depending on the alloy and processing technique used, pound for pound aluminum can be forged to be just as strong if not stronger than some steel.
What are the weaknesses of aluminum?
Aluminum alloys will warp at high temperatures and unlike steel, do not glow red before melting. Aluminum alloys also feature a lower fatigue limit than steel and will continually weaken with repeated stress.
Is Aluminium stronger than iron?
One of the first differences that one can come across between the two metals is that iron is heavier than Aluminium. Aluminium has only a specific weight of 2.7 g/cm3, which is much lower than iron. This low weight makes Aluminium a better metal for use in various machines.