Steel degassing is the process of removing entrained gases from liquid steel. This is accomplished by holding the steel at a temperature, below the critical temperature of the alloy components, in order to dissolve the entrained gases into the steel. The gasses are then removed through controlled oxidation of the dissolved gas species.
Steel degassing is an important process for many industries, including the automotive, aerospace and consumer industries, which rely on a high quality steel in order to produce the best components. Degassing can help ensure that the steel meets the desired properties, such as strength, ductility, corrosion resistance and malleability, as well as other important characteristics.
The process for steel degassing begins with heating the steel in a furnace. Depending on the steel composition and process requirements, the furnace temperature can range from 800°C to 1300°C or higher. The heating stage starts with carbon content increase, followed by a holding stage. During this stage the entrained gases dissolve into the molten steel.
Once the steel is heated, the furnaces door is opened and the steel is transferred to the degasser. An oxygen lance is inserted into the degasser which has a number of injection points. The oxygen injected into the degasser oxidizes the entrained gases.
In order to maintain a controlled oxygen level in the degasser, an oxygen analyzer is used to measure the concentration of the dissolved gases. This allows for constant control and monitoring of the oxygen level and makes it possible for the time required for degassing to be accurately predicted.
Once the degassing process is complete the steel is ready for further processing. This may involve cooling and rolling in order to create the finished shape and product. The degassed steel can then be used in a variety of applications from automotive components to aircraft manufacturing, consumer products and more.
Steel degassing is an important part of the production process for many industrial and consumer goods. By removing entrained gases, steel producers are able to create a product that meets the desired specifications and requirements. In addition, degassing helps to reduce or eliminate any potential production problems that can arise due to the presence of excess gases. Through the use of an oxygen analyzer and other techniques, steel producers can ensure that their product is of the highest quality.
