Three smelting modes of electrode paste submerged arc furnace
Three smelting modes of electrode paste submerged arc furnaceWhen it comes to smelting mode, briefly introduce the three smelting modes of electrode paste sub
Three smelting modes of electrode paste submerged arc furnace
When it comes to smelting mode, briefly introduce the three smelting modes of electrode paste submerged arc furnace.
Submerged arc mode - requires energy to operate in the electrode paste electrode submerged arc and hot furnace mouth released from the slag layer, such as: high carbon ferrochrome, silicon manganese alloy.
Submerged arc mode - submerged arc and cold surface operation (note: different from above) that requires energy to concentrate in the reaction zone, such as: ferrosilicon.
Resistance mode - such as: electrode paste ferrotungsten smelting. Arc Interruption Mode - Arc Interruption and Hot Furnace Operations that require energy to be released on the surface of the molten pool, eg: Nickel Iron.
A friend asked, can't the submerged arc mode be used in the high-standard closed paste smelting of ferronickel? can.
1. Submerged arc mode - laterite ore - melt resistance characteristics (with limestone) - slag type (silicon dioxide - calcium oxide - magnesium oxide series, basicity is about 0.93) - nickel-iron products (nickel group Low score, high iron content, 10%-11% nickel content)
Electrical parameters - high current, low voltage - low power factor - easy to insert the electrode - easy to cut off or give insufficient load - high smelting temperature (over 2100 degrees on average) - serious furnace bottom erosion - High power consumption
2. Arc shielding mode - laterite ore - melt resistance characteristics (natural ore) - slag type (ferrous oxide - silica - magnesium oxide series, basicity about 0.6) - nickel-iron products (nickel component High, low iron content, 15%-20% nickel)
Electrical parameters - low current, high voltage - high power factor - electrode lift - low smelting temperature (slag melting point is 1623-1703 degrees, alloy melting point is 1400-1493 degrees) - low power consumption
By comparing the process and electrical parameters of the above two modes, it can be seen that the submerged arc mode furnace is deteriorated, difficult to operate, the content of nickel components is low, the power consumption is high, and the electrode paste electrode consumption is also high; while the arc shielding mode has a great effect. Advantages: stable furnace condition, easy operation, high content of nickel components, low power consumption, low consumption of electrode paste and electrode.
This is the conclusion drawn by the smelter's production test, not the result of speculation. Therefore, the arc shielding mode is the preferred mode for smelting ferronickel by most of the electrode paste submerged arc furnace method (that is, the Elkem method) at home and abroad.
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electrode paste
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