a. When the carbonizer is used in the melting of the medium-frequency electric furnace, it can be placed in the middle and lower position of the medium-frequency electric furnace according to the requirement and proportion of carbon content after the casting material. At this time, the recovery rate of the carbonizer is more than ninety-five percent.
b. The carbonizer in the amount of carbon is not enough to adjust the amount of carbon when using the methods: first the slag in the electric furnace to play clean, and then add the carbonizer. At this time, the liquid iron is heated, and then electromagnetic stirring or artificial agitation is used to make the liquid iron in the coal completely dissolve and be absorbed. Thus, the recovery rate of the carbonizer is about ninety percent.
c. Carbonizer is applied when using the low-temperature carbonization process: when only a part of the liquid iron is melted in the furnace charge, the temperature is relatively low at this time. A carbonizer can be added to all liquid iron, at the same time, when using a solid charge, the carbonizer will be pressed into the liquid iron without causing it to be exposed. With this method, the carbonization of liquid iron can reach more than 99%.