A induction melting furnace charging operation

(1) , before loading to carefully confirm alloy, high alloy material returns, scrap ingots of commodity categories, avoid loading errors. Quantitatively loaded and recorded according to the requirements of the production organization and variety plan.

(2) The alloys, high alloy return materials and scrap steel ingots that are put into the furnace shall not be mixed with other sundries, and shall not be wet or have mud or rain.

(3) , closed containers are strictly prohibited from being placed in the furnace.

(4) , when the alloy is melted, and the block if the name of the different alloys, the requirements charge a higher melting point alloy, such as: molybdenum, tungsten, iron or the like in the middle: at the bottom of the lower melting point alloy or upper For Cr alloys, place the smaller block in the bottom or middle, and the block in the upper part. (5) Melting the chromium alloy. When the molten steel surface is 500mm from the edge of the furnace mouth , chromium alloy or other high melting point alloys (such as: ferromolybdenum, tungsten iron, etc. ) are not added in principle . If the smelting variety is required, it is required to be added in batches when adding, and each batch shall not exceed 200kg . Before each batch is added, it must be ensured that the alloys that have been added to the furnace are all melted before they can continue to be added.

(6) , is loaded ingot, the material requirements for filling small gaps ingot furnace wall, in order to accelerate the rate of melting and improve magnetic efficiency.

B induction melting furnace smelting operation

(1) , if the molten steel left in the furnace is greater than 3T , the maximum charge, transmission power can be adjusted to allow the start of the power load; or if the furnace is not left remaining molten steel is less than 3T , ingot or other bulk loaded After heavy material, the power should be gradually increased at regular intervals. It is strictly forbidden to adjust the power to the maximum allowable load within the first 10-15 minutes .

(2) , the power transmission to be observed at any time during furnace conditions, or when the bypass carrier material occurs, to be disposed within the bottom portion to avoid accidents caused by high temperature of the molten steel, while avoiding wasteful power consumption.

(3) , in order to avoid air oxidation of the molten steel is exposed, during the melting process, at the site (or the bare steel) forming a molten pool added amount of pre-melting synthetic slag, to the total amount of each furnace control 10 20 kg , the charge to be After all the melting, the power should be reduced appropriately, and 1-2 bags of cover agent should be added .

(4) , in an oven pre-service (50 times before ) , the furnace according to the case, because if the local added 20Mn23AIV return Viscoelastic slag seriously affect loading, smelting slag viscosity during the addition of the parts 5 - 10kg calcium silicate block was added The total amount is not 20kg .

(5) , to confirm or return to the furnace steel ingot after melting all clear material, temperature measurement, in addition to confirm the alloy melt other than the temperature reached 1600 deg.] C, before sampling, laboratory furnace to be notified prior to sampling of the contained material returned Category and quantity. After the ingredients are determined, the refining section and scheduling should be notified immediately.

(6) , the smelting furnace process to the level observed at any time whether or encrustation, in particular an upper low-temperature region, such as found in the case of crusts, processing power required immediately, to avoid the accident.

C induction melting furnace tapping operation

(1) , tapping temperature.

When melting the alloy, if it contains molybdenum and tungsten alloy, the tapping temperature is required to be controlled at 1650 - 1700 °C; the molten manganese is melted, and the tapping temperature is controlled at 1600 - 1620 °C. In addition to confirming the molten alloy, when melting the ingot or other returning material, the tapping temperature is determined according to the molten steel composition in the furnace.

(2) , the amount of steel.

After the temperature reaches the tapping requirements, according to the molten steel composition of the smelting process and the scheduling of the production organization, the tapping amount is required to be tapped. Smelting alloy, smelting chrome molybdenum steel, if not continuous operation, tapping according to the required amount of tapping. Smelting alloy, smelting chrome molybdenum, if the steel is not continuously operated, it must be exhausted. After the tapping is completed, 2 - 3 bags of covering agent are added to the ladle . Before the tapping, the tapping trough should be cleaned to ensure the smooth flow of steel and no blockage or scattering.