30+ YEARS OF EXPERIENCE IN CARBON INDUSTRY

Broadly speaking, all self-baking electrode pastes are called electrode paste. Electrode paste, also known as self-baking electrode paste, is a semi-finished electrode material, made from aggregates such as ECA and calcined petroleum coke, and binders such as pitch and coal tar. During usage, the electrode paste is added to the submerged arc furnace. When heated to approximately 400 degrees, the electrode paste melts and then sintersects into a solid. When heated to 800 degrees, it combines with the original ore, generating immense heat through an electric arc to smelt the ore.

The term "closed electrode paste" refers specifically to the type of submerged arc furnace (SAF). SAFs are categorized as closed, semi-closed, and open. All these different types of SAFs use electrode paste. Due to the different furnace types, over time, the electrode paste used in closed SAFs has become known as closed electrode paste, or simply closed paste. The electrode paste used in open or semi-closed SAFs is called standard electrode paste, or simply electrode paste.

Therefore, closed electrode paste is a subcategory of electrode paste, specifically designed for use in fully enclosed large-scale submerged arc furnaces, sealed calcium carbide furnaces, and silicon metal furnaces. Of course, closed electrode paste, used in the more demanding conditions of SAFs, requires more precise raw material formulation, resulting in a higher quality than ordinary electrode paste, with better performance in resistivity and ash content.

Here's a simple guide to choosing the right electrode paste:

For small open/semi-closed submerged arc furnaces with limited budgets, standard electrode paste is sufficient.

For fully enclosed large electric furnaces, high-power furnaces, furnaces requiring frequent paste bridging, or furnaces with slow sintering, choose closed electrode paste directly.

For automated silos and low-temperature winter environments, prioritize closed electrode paste.