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For open-air manual paste feeding, trapezoidal electrode paste is preferred.

For a closed furnace with manual paste feeding, oval electrode paste is preferred.

If there is an automatic storage silo and use conveyor auto feeding, cylindrical electrode paste must be selected.

If the electrode shell inner diameter is small and the rib spacing is narrow, oval electrode paste is preferred, large-sized trapezoidal paste is strictly prohibited.

Conversely, if the electrode shell has a large inner diameter and wide ribs, all three shapes are acceptable. For high-load smelting furnaces, cylindrical electrode paste is preferred.

For frequent issues such as paste hanging, slow lowering paste column, and frequent soft breakage, cylindrical electrode paste is the first choice, followed by oval electrode paste. If the electrode frequently oxidizes or becomes loose during baking, then trapezoidal paste is the first choice.

For furnaces with small to medium loads and intermittent operation: oval and trapezoidal electrode pastes offer better cost-effectiveness; For high-power furnaces with continuous full-load smelting, cylindrical electrode paste is preferred.

In southern China's ambient temperature factories, all three shapes are suitable.

in northern factories with low temperatures in winter, oval and cylindrical electrode pastes are preferred.

Special reminder: If it is a new factory operate for the first time, and the furnace conditions are uncertain, oval electrode paste should be tried first, as it has the strongest versatility and the highest tolerance for error. For newly built large closed furnaces, to ensure low unit consumption, cylindrical electrode paste can be used directly.

Please note that electrode pastes of three different shapes and sizes should not be mixed arbitrarily, as this can easily cause disordered stacking gaps and induce accidents such as paste bridging.