Four musts for the melting period of steelmaking in induction melting furnace

1. A new crucible must be used in accordance with the technical regulations for the baking system. Even if the first furnace is qualified, H13 cannot be refined, and small electrode rods can be refined even if it is required.

2. Two people must concentrate on loading at different times, no off-duty is allowed, do not be lazy, and slowly release one hand and the other, otherwise it will waste electricity and cause high temperature oxidation of the furnace charge, burning of alloy elements, and air inhalation.

3. When the furnace charge is melted to 70-80%, it is judged that the slag will not be encased, and lime must be added immediately to increase the alkalinity of the slag. Improve the ability of slag to cover molten steel and prevent gas suction. To remove the oxidized slag in a timely manner, use a slag collector (pearl powder), yellowstone deoxidizer, and lime as an auxiliary means to remove the oxidized slag (the oxidation slag tool is prohibited from being used during the reduction period). Do not add reducing agent on the oxidized slag. In the future, 20-40 seconds after adding Ca-Si, be sure to tap, beat, and stir the slag. In summer, two people will work in turn, and no lazy people are allowed to make steel. Steel, that is chemical steel, for the large amount of smelted steel scraps, it is not suitable to use the single slag method (that is, the slag will not be changed after deoxidizing slag). The double slag and three slag methods for smelting oil and gas are more heavy than H13. Reasonable craftsmanship. It is a technical error to use partial oxidation slag with low alkalinity and poor physical properties.

4. The clear sample must be taken after slag replacement, pre-deoxidation and pre-addition of ferro-vanadium. Remove the slag before sampling, remove the slag with a flat plate after sampling, re-slag, carry out diffusion deoxidation, stir the slag as appropriate, if the slag needs to be replaced, the amount and composition of the slag in the early stage of refining must meet the specified requirements, if the slag is not stirred, fluorite It can be added less, but the diffusion deoxidation should not be less than 2-3 batches, and then the work will be reduced. After the results come back, adjust and add additional alloys and charge, do 1-2 batches of refining and deoxidation, slag off and re-slagging, then the slag composition should meet the requirements, after 2-3 batches of diffusion deoxidation, insert the aluminum ring and measure the temperature Adjust the temperature, reduce the work force and tap the steel.