| By the side of a wood, in a country a long way off, ran a fine stream of water; and upon the stream there stood a mill. The miller's house was close by, and the miller, you must know, had a very beautiful daughter. She was, moreover, very shrew... Read more of Rumpelstiltskin at Children Stories.ca |  Informational.caPrivacy |
Steel MakingSteel Before The 1850'sIn spite of a rapid increase in the use of machines and the ... For Milling Cutters And Formed Tools FORGING.--Forge as before.--ANNEALING.--Place the steel in a ... Fatigue Tests It has been known for fifty years that a beam or rod would fa... Highly Stressed Parts The highly stressed parts on the Liberty engine consisted of ... Nickel Nickel may be considered as the toughest among the non-rare a... Alloying Elements Commercial steels of even the simplest types are therefore p... Quenching The Work In some operations case-hardened work is quenched from the bo... Blending The Compound Essentially, this consists of the sturdy, power-driven separa... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Annealing Work With the exception of several of the higher types of alloy s... Heat Treatment Of Milling Cutters Drills Reamers Etc THE FIRE.--Gas and electric furnaces designed for high heats ... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... Gas Consumption For Carburizing Although the advantages offered by the gas-fired furnace for ... Double Annealing Water annealing consists in heating the piece, allowing it to... Hardening Carbon Steel For Tools For years the toolmaker had full sway in regard to make of st... Short Method Of Treatment In the new method, the packed pots are run into the case-har... Detrimental Elements Sulphur and phosphorus are two elements known to be detrimen... Connecting Rods The material used for all connecting rods on the Liberty engi... Corrosion This steel like any other steel when distorted by cold worki... Liberty Motor Connecting Rods The requirements for materials for the Liberty motor connecti... |
Bessemer ProcessCategory: STEEL MAKING The bessemer process consists of charging molten pig iron into a huge, brick-lined pot called the bessemer converter, and then in blowing a current of air through holes in the bottom of the vessel into the liquid metal. The air blast burns the white hot metal, and the temperature increases. The action is exactly similar to what happens in a fire box under forced draft. And in both cases some parts of the material burn easier and more quickly than others. Thus it is that some of the impurities in the pig iron--including the carbon--burn first, and if the blast is shut off when they are gone but little of the iron is destroyed. Unfortunately sulphur, one of the most dangerous impurities, is not expelled in the process. A bessemer converter is shown in Fig. 1, while Fig. 2 shows the details of its construction. This shows how the air blast is forced in from one side, through the trunnion, and up through the metal. Where the steel is finished the converter is tilted, or swung on its trunnions, the blast turned off, and the steel poured out of the top. Next: Open Hearth Process
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