Electrode Paste (for Metallurgy) is a component that's used to power the charge in submerged arc furnaces. It delivers electricity to fuel the smelting process and drives smelting. It consists of a coal tar pitch binder with a solid carbon filler and is typically packed in the form of a cylindrical or briquette and used continuously to bake into a solid carbon electrode. This self-baking electrode is a cost-effective alternative to graphite electrodes. When baked well, the anode's electrical properties are similar to those of graphite. A close-up photo of carbon electrode is presented in the present submission. It reveals that it has a thick, dense, and smooth paste.
The raw materials of electrode paste are mainly gas or electric calcined anthracite, coal tar pitch and coal scrap. Calcined anthracite has a relatively dense structure with local graphitisation and excellent mechanical strength, which makes it an ideal choice as a carbon filler in anode paste. Gas calcined and electric calcined calcined anthracite are produced according to customer needs. It can also be delivered in cylinders or blocks.
The main binding agent in Soderberg electrodes is coal tar pitch. It can be obtained from many sources worldwide. Coal-tar pitches vary according to their coking value and quinoline or toluene content. The thermal dimensional behaviour of the coal tar pitches and the calcined anthracite are also influenced by their calcination process. It is necessary to calcine anthracite to eliminate volatile organic compound and stabilize the anthracite in terms of its dimension (Asphaug, Innvaer and Stanko).
Shoko et. The thermal behaviour of coal tar pitches used in Soderberg paste manufacturing worldwide was investigated by Shoko et al. They found that coal tar pitch binders in the case studies shrunk.
The baking isotherm temperatures of coal tar pitch cases studied in the study were determined with greater accuracy using the TMA technique than was previously reported. The information provided is crucial for managing Soderberg electrodes within smelters. It allows for more accurate predictions of thermal behavior of coal tar pitches and anthracites just below the Baking Isotherm Temperature. The authors hope that this work will provide an additional tool to assist in risk mitigation and improve safety at smelters operating with Soderberg electrodes. It's important because the likelihood of anode rupture increases with increased operating temperatures. In addition, the authors believe that their technique can be applied to other coal tar pitches commonly used in Soderberg electrode paste production and help to reduce the risk of anode failures by better understanding their thermal dimensional behaviours.
English
Write a Message