Fisico2000

The term Oxy-fuel refers to an oxygen-fuel mixture often used in welding. It is used because it is commonly available, inexpensive, and very efficient. Welders, especially home welders, prefer it to arc welding because it is easier to control the heat and intensity of the tool.Oxygen fired pulverised coal combustion (Oxy-Fuel), offers a low risk step development of existing pf power generation technology to enable CO2 capture and storage.

Users

The biggest users of Oxy-fuel are welders and metalworkers in general. It is used because it is commonly available, inexpensive, and very efficient. Welders, especially home welders, prefer it to arc welding because it is easier to control the heat and intensity of the tool, thus making it much more mobile.

Characteristics

Oxygen fired pulverised coal combustion (Oxy-fuel), offers a low risk step development of existing pf power generation technology to enable CO2 capture and storage. One of the most effective and cost efficient ways to cut steel and alloy plate is with specially designed oxygen and fuel torches and tips.Oxy-firing of PF in boilers involves the combustion of pulverised coal in a mixture of oxygen and recirculated flue gas in order to reduce the net volume of flue gases from the process and to substantially increase the concentration of carbon dioxide (CO2) in the flue gases – compared to the normal pulverised coal combustion in air. Oxygen combustion combined with flue gas recycle increases the CO2 concentration of the off-gases from around 15% for pf up to a theoretical 95%. Oxy-combustion is likely to give increased fuel flexibility (same as current pf).

Uses

Oxy-fuel technology has industrial applications today, mostly in welding and cutting of metals, as fuels burn at a significantly higher temperature in O2 than in air. Glass furnaces usually use oxy-fuel combustion to obtain the high temperatures needed in to produce glass.

History

The heliarc technique for welding was discovered in November of 1942. However, for nearly half a century prior, and since the discovery, the common oxy-fuel torch has been a significant part in the aluminum joining process. In the 1850s, metals of low melting points such as gold, silver, copper, and platinum, first began to be torch welded using oxy-hydrogen produced by electrolysis. Of special note is the fact that acetylene's discovery was directly associated with the search for another method of producing aluminum metal, and that both materials finally came into commercial production in the late 1800s.