Electrode Paste Quality plays a vital role in the success of a production process. This is especially true for processes that require high temperatures. It provides a conducive pathway for electrical currents to travel through the production environment, improving overall efficiency and consistency. The electrode paste's quality is affected by the type of raw material and method used to prepare it.
In order to achieve the best performance, electrode pastes must maintain their structure. Moreover, the pastes must have the ability to resist harsh operating conditions and not degrade over time. To achieve this, they must have superior thermal and mechanical properties.
For electrode pastes to meet the high standards, they must be made from a variety of raw materials based on carbon. Most commonly, petroleum coke is used, followed by anthracite and metallurgical char. These raw materials are then bound together with coal tar pitch. In this way, a continuous baking electrode can be created (also known by the name of a Soderberg electrode), that is used as an electrical conductor from the arc to smelting zones.
The raw materials that are used to produce electrodes must go through important processes, such as crushing or sieving. The carbon particles will be of an acceptable size and pureness, allowing them to mix more easily. It is essential to achieve high-quality products in the smelting sector that will withstand the harsh operating conditions.
Due to this, advanced production methods and special equipment are needed for the manufacture of electrode pastes with high quality. It is important to understand the interaction between carbon-based materials and how they behave. This allows for the development of superior electrode pastes that offer high strength, good sintering performance, and resistance to thermal shock.
Recently, the company set up a R&D team consisting of 8 R&D staff. Youming Hu leads the team. This team is led by Youming Hu, a senior engineer at the company. He has vast experience developing electrode pastes of the highest quality that can meet the demands of the large-scale ore-heating ovens in China. Customer feedback has been positive, particularly on his development of a no-flow, high-strength paste.
Youming, in order to reach these goals has studied the thermodynamic characteristics of carbon materials. For example, he has developed a technique to characterize the thermal dimensional behavior of Soderberg electrode paste raw materials using thermomechanical analysis. This approach involves measuring the sintering and shrinkage of two case study coal tar pitches, three anthracites, and a pre-baked electrode sample. These materials have a baking isotherm between 450-475 degrees Celsius. These data suggest that calcined coal expands much less than coke above the baking temperature. This is due the the fact the the anthracite has more compact atoms than coke.
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