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Brief description of process flow
The qualified silica, coke and ferrous materials are sent to the batching bin by the loader. After being unloaded by the electronic belt scale, the mixed materials are sent to the middle silo on the 4th floor by the inclined bridge feeding device, sent to 7 silos by the distribution truck, and fed into the furnace through the material pipe.
The charge enters the semi closed submerged arc furnace, and the current is introduced into the furnace by a three-phase transformer through the short network. The arc heating generated between the electrode and the charge is transmitted to the furnace full of charge. Through the arc heat and resistance heat, silica can be reduced to ferrosilicon alloy. In the whole smelting process, the strength of voltage and current on the electrode are set according to the smelting process parameters, In different periods, the values of voltage and current are also different, that is, the power input into the furnace is different, the electrode is always stably inserted into the charge in the furnace, and the gas escapes evenly from the whole charge surface. The electric arc is not exposed from beginning to end. The evenly mixed furnace charge is added into the furnace in small batches with the decline of the charge level, so that the charge level in the furnace remains at a certain height, and a cone shape appears around the electrode. When the ferrosilicon water generated by reduction in the furnace is stored to a certain extent, open the furnace hole with an eye opener, discharge ferrosilicon alloy, and then plug the furnace hole. The electric furnace is discharged once every 2.5 hours, and the amount of iron is
It is about 2 tons. After tapping, it is pulled to the pouring room by the vertical winch, and the molten iron ladle is lifted by the crown block and poured into the spindle mold. After the alloy is slightly cooled, pry it up and lift it to the iron container with a crown block. After cooling, transport it to the finished product warehouse with a flat car or loader.
An 8000kVA ferrosilicon furnace taps three times per shift, and samples are analyzed for each taping. The results of each sample analysis are required to be provided in front of the furnace within one hour.
Smelting and pouring are carried out in 3 shifts, with a daily output of about 18 tons。
Configuration parameters of 8000kVA ferrosilicon furnace
Main parameters of electric furnace transformer
Serial number name Company Parameters remarks
one Rated capacity of transformer kVA eight thousand
two Primary side voltage kV twenty Tentative
three Secondary side voltage V 96V～120V～138V Level difference 3V, level 15 on load electric voltage regulation
four Rated current at secondary side A thirty-eight thousand four hundred and ninety-one
five Short circuit impedance ≤ 5.5% at 138v
Main parameters of electric furnace
one Shell diameter mm φ eight thousand
two Shell height mm three thousand and eight hundred
three Furnace diameter mm φ five thousand
four Furnace depth mm one thousand and nine hundred
five Electrode diameter mm φ eight hundred and fifty
six Polar circle mm φ 2100±100
seven Hood height mm three thousand
eight Electrode working stroke mm one thousand and two hundred
nine Electrode lifting speed m/mi zero point five
ten Number of outlet One two
Brief description of process flow
The qualified silica, coke and ferrous materials are sent to the batching bin by the loader. After being unloaded by the electronic belt scale, the mixed materials are sent to the middle silo on the 4th floor by the inclined bridge feeding device, sent to 7 silos by the distribution truck, and fed into the furnace through the material pipe.
The charge enters the semi closed submerged arc furnace, and the current is introduced into the furnace by a three-phase transformer through the short network. The arc heating generated between the electrode and the charge is transmitted to the furnace full of charge. Through the arc heat and resistance heat, silica can be reduced to ferrosilicon alloy. In the whole smelting process, the strength of voltage and current on the electrode are set according to the smelting process parameters, In different periods, the values of voltage and current are also different, that is, the power input into the furnace is different, the electrode is always stably inserted into the charge in the furnace, and the gas escapes evenly from the whole charge surface. The electric arc is not exposed from beginning to end. The evenly mixed furnace charge is added into the furnace in small batches with the decline of the charge level, so that the charge level in the furnace remains at a certain height, and a cone shape appears around the electrode. When the ferrosilicon water generated by reduction in the furnace is stored to a certain extent, open the furnace hole with an eye opener, discharge ferrosilicon alloy, and then plug the furnace hole. The electric furnace is discharged once every 2.5 hours, and the amount of iron is
It is about 2 tons. After tapping, it is pulled to the pouring room by the vertical winch, and the molten iron ladle is lifted by the crown block and poured into the spindle mold. After the alloy is slightly cooled, pry it up and lift it to the iron container with a crown block. After cooling, transport it to the finished product warehouse with a flat car or loader.
An 8000kVA ferrosilicon furnace taps three times per shift, and samples are analyzed for each taping. The results of each sample analysis are required to be provided in front of the furnace within one hour.
Smelting and pouring are carried out in 3 shifts, with a daily output of about 18 tons。
Configuration parameters of 8000kVA ferrosilicon furnace
Main parameters of electric furnace transformer
Serial number name Company Parameters remarks
one Rated capacity of transformer kVA eight thousand
two Primary side voltage kV twenty Tentative
three Secondary side voltage V 96V～120V～138V Level difference 3V, level 15 on load electric voltage regulation
four Rated current at secondary side A thirty-eight thousand four hundred and ninety-one
five Short circuit impedance ≤ 5.5% at 138v
Main parameters of electric furnace
one Shell diameter mm φ eight thousand
two Shell height mm three thousand and eight hundred
three Furnace diameter mm φ five thousand
four Furnace depth mm one thousand and nine hundred
five Electrode diameter mm φ eight hundred and fifty
six Polar circle mm φ 2100±100
seven Hood height mm three thousand
eight Electrode working stroke mm one thousand and two hundred
nine Electrode lifting speed m/mi zero point five
ten Number of outlet One two
