Electrically calcined coal (ECA) is an anthracite coal that has undergone an electric calcination process in order to enhance the graphitic structure of the coal. The process takes place at temperatures up to 2 000degC. By doing so, the coal's ash content is reduced, its moisture content increases, and its sulfur content decreases. ECA has many applications in steel and smelting. The ECA can also be used to produce carbon paste electrodes in the aluminum industry, as well As a Soderberg, tamping and machine part electrodes.
In the forecast period, 2021-2028 there is a high CAGR for growth in the global anthracite market. This is mainly due to rise in disposable income and growth in urbanization, globally. This market has been segmented by product, geographical location and application. Steel industry has the biggest segment and is the most important. On the basis of the calcination process, the market has been divided between Gas calcined Anthracite (GCA) and Electrically Calcined Anthracite (ECA). The electro-calcination process is similar in function to traditional gas calcination, but it offers efficiency benefits. The report identifies drivers, barriers and growth opportunities within the Electrically calcined Anthracite(ECA) global market. It also examines future trends. It also provides an in-depth analysis of the competitive landscape. Report includes profiles of major players including Rheinbraun Carbon GmbH, Elkem Asbury Carbons Canada Carbon Dongsheng Wanboda Carbons & Graphite IVY Carbon Products Zhixin, amongst others.
Electric calcining of carbonaceous material such as anthracite, pitch coke and metallurgical coke is carried out by conducting electric current through a bed of the material which is to be calcined. One carbon electrode will be placed at the top, and another one in the lower part of a calcining chamber. The electric current passes through the carbon electrodes, which heat up the carbonaceous material to a high temperature, which is followed by a cooling process. The final calcined substance is discharged out of the bottom furnace.
In the invention, the lower part is the calcining ring 8. It is cylindrical in shape and has an upper opening. This ring is located centrally about the bottom electrode. A space annular is formed in the ring 8, which extends outwardly to the perimeter of the bottom portion of a calcining oven. This ring arrangement can ensure that the center flow of the calcined carbonaceous material does not mix with the peripheral stream during the heating process by the bottom electrode. As a result, the calcined material which is discharged in the center of the ring has a high quality in terms of low ash content and high electric conductivity and exhibits a high degree of graphitization.
English
Write a Message