Reasons for Iron Infiltration in the Submerged Arc Furnace

Reasons for Iron Infiltration in the Submerged Arc Furnace

Analysis of the reasons for iron infiltration in submerged arc furnace:

Analyze the reasons:

① Whether the physical and chemical indicators of self-baking carbon bricks can reach the national standard;

②When masonry, the gap does not meet the masonry requirements, some refractory bricks have been reworked, and the rest of the masonry quality can meet the masonry requirements;

③ When adding wood and coke, the heating is too fast, and the temperature of the whole furnace body rises rapidly;

④Operate the forced insertion electrode to increase the voltage;

⑤When the current exceeds the rated value, the non-power greatly exceeds the available power, and the compensation rate factor fluctuates around 0.3;

⑥It is difficult to insert the electrode, stop the dolomite in the early stage, increase the coke, reduce the coke in the later stage, and add non-carbon materials;

⑦It is extremely inappropriate to use the high-grade A1203 slag type, the high melting point furnace will shrink the crucible, the electrode is difficult to insert, the slag discharge is not easy, the slag discharge is clean, and the furnace condition has deteriorated;

⑧The impact of two large slag linings on the furnace lining.

Treatment measures for iron infiltration in submerged arc furnace:

①The ratio of the charge is moderately adjusted to lower Mn/Fe. In contrast, increasing the iron element in the charge will help digest the carbonized cinnamon accumulated at the bottom of the furnace;

②With carbon emission, the material batch Zhongyuan considers the 8^ carbon emission of 10% can be reduced to 5%, and the normal material batch can be restored at any time according to the increase of iron-carbon emission;

③ Appropriately increase the alkalinity of the batch and reduce the difficulty of slag discharge;

④ Pushing up the voltage in time will further aggravate the temperature rise at the furnace mouth;

⑤In the presence of technical management personnel, the semi-melting charge in the crucible area can be squeezed out occasionally by the plug-in electrode during the later stage of iron tapping to strengthen the slag discharge at the furnace mouth;

⑥Adjust the quality of coke, use blue carbon and coke in a certain proportion, and increase the specific resistance;

⑦The current is controlled within the rated value; the slag discharge at the furnace mouth is strengthened;

⑧ Under the condition that the electrode does not rise significantly, the iron tapping cycle should be extended moderately and the furnace temperature should be increased.