Industrial gases used in steel industry...

Industrial gases used in steel industry The term “Industrial gas” refers to a group of gases (Fig 1) which are specifically produced for use in a variety of industrial processes. They are distinct from the fuel gases. Speciality gases such as neon, krypton, xenon and helium are sometimes considered under the category of industrial gases.  Industrial gases are produced and supplied in both gas and liquid form and transported in cylinder, as bulk liquid or in pipelines as gas. Industrial gases usually used in steel industry are oxygen, nitrogen, argon and hydrogen. Fig 1 Industrial gases Oxygen Oxygen (O2) is an active component of the atmosphere making up 20.94 % by volume or 23 % by weight of the air. It is colorless, odorless and tasteless. Oxygen is highly oxidizing.  Oxygen reacts vigorously with combustible materials, especially in its pure state, releasing heat in the reaction process. Many reactions require the presence of water or are accelerated by a catalyst. Oxygen has a low boiling/ condensing point which is -183 deg C. The gas is approximately 1.1 times heavier than air and is slightly soluble in water and alcohol.  Below its boiling point, oxygen is a pale blue liquid slightly heavier than water. Properties of oxygen are at Tab 1. Oxygen is produced in large quantities and at high purity as a gas or liquid by cryogenic distillation and in smaller quantities as a lower purity gas (typically about 93%) by adsorption technologies such as pressure swing adsorption (PSA) or vacuum pressure swing adsorption (VPSA or VSA). Oxygen is the second largest consumed industrial gas.  Aside from its chemical name O2 oxygen is also referred to as GOX or GO when produced and delivered in gaseous form, or as LOX or LO when in its cryogenic liquid form. Oxygen is...