Do you know the cause analysis and treatment scheme of iron infiltration in submerged arc furnace lining?


The reason analysis and treatment scheme of iron infiltration in the lining of submerged arc furnace. I will teach you some methods. First, I will take you to understand the reasons for iron infiltration in submerged arc furnace?

Cause analysis of iron infiltration in submerged arc furnace


Analyze the reason:


① Whether the physical and chemical indexes of self baking carbon brick can meet the national standard;


② During masonry, the gap does not meet the masonry requirements, some refractory bricks are reworked, and whether the rest masonry quality can meet the masonry requirements;


③ When drying the furnace, more wood and coke are added, the temperature rises too fast, and the temperature of the whole furnace rises rapidly;


④ Strong insertion of electrodes in operation to increase the voltage;


⑤ When the current exceeds the rated value, the reactive power greatly exceeds the active power, and the power factor fluctuates about 0.3 with compensation;


⑥ It is difficult to insert the electrode. Stop adding dolomite in the early stage to increase coke, reduce coke and add carbon free material in the later stage;


⑦ It is extremely inappropriate to adopt high A1203 slag type. The high melting point furnace will shrink the crucible, the electrode is difficult to insert, and the slag is not easy to discharge, which will aggravate the deterioration of the furnace condition;


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


Treatment measures of iron infiltration in submerged arc furnace


① Appropriately reducing the Mn / Fe ratio in the charge ratio and increasing the iron element in the charge will be conducive to digesting the carbonized cinnamon accumulated at the bottom of the furnace;


② Carbon emission shall be adopted. The carbon emission of 8 ^ 10% in the material batch can be reduced to 5%, and the normal material batch shall be restored at any time according to the increase of iron tapping carbon emission;


③ Moderately improve the alkalinity of the batch and reduce the difficulty of slag discharge;


④ Push up the voltage in time, and suddenly increase the voltage will further aggravate the rise of furnace mouth temperature;


⑤ In the presence of the technical management personnel, the power cut electrode can be used occasionally in the later stage of tapping to squeeze out the semi molten charge in the crucible area, and strengthen the slag discharge at the furnace mouth at the same time;


⑥ Adjust the coke quality, use blue carbon and coke together according to a certain ratio, and increase the specific resistance;


⑦ The current shall be controlled within the rated value; Strengthen slag discharge at furnace mouth;


⑧ When the electrode does not rise significantly, appropriately extend the tapping cycle to improve the furnace temperature.


The above are some treatment measures shared by submerged arc furnace manufacturers. For more details, please refer to the official website: http://www.ayynd.com/


Key words: submerged arc furnace DC submerged arc furnace DC electric arc furnace