Low sulfur graphite carburizer

Low sulfur graphite carburizer: at present, whether the casting enterprises use cupola production or induction furnace production, in carburization, generally use pig iron or low sulfur graphite carburizer in cupola or induction furnace adjustment. When carburizing in the furnace, cupola needs to wait for the waiting column to fall, induction furnace needs to melt, diffusion, processing speed is slow, time-consuming, affect the production efficiency; Especially the use of pig iron carburization, virtually improve the proportion of pig iron ingredients, greatly increase the production cost.

In view of the shortcomings of the existing technology, a spheroidal cast iron smelting furnace carburization process, the use of low sulfur graphite carburizer through the furnace carburization method, to solve the furnace carburization treatment speed is slow, time-consuming, low productivity, can save production costs. The cupola or induction furnace will be used to smelting smelting iron, iron scrap, scrap iron, the temperature of 1460-1500 degrees of molten iron into cupola desulfurization bag or induction furnace spherodizing bag, with low sulfur graphite carburizing agent carburizing treatment. External carburizing process of nodular cast iron melting furnace, low sulfur graphite carburizer contains 95% carbon and 0.05% sulfur.

In the external carburizing process of nodular cast iron melting furnace, adding low sulfur graphite carburizing agent into cupola desulfurization bag and filling nitrogen; In the process of external carburization of nodular cast iron melting furnace, low sulfur graphite carburizer is added to one side of induction furnace spheroidizing agent. The advantage of the external carburization process of nodular cast iron melting furnace is that the method of external carburization is adopted without adjusting the carbon quantity of the whole furnace, which reduces the labor intensity of the operator. It saves the time of adjusting the carbon quantity, saving labor and trouble; Save the energy consumption caused by the whole furnace carburization; It will not affect production due to carbon treatment and does not use pig iron at the same time, saving cost.



The external carburizing process of nodular cast iron melting furnace provides a process for the production of nodular cast iron for carburizing treatment outside the furnace, without the use of pig iron, without the addition of carburizing agent in the furnace, the use of low sulfur graphite carburizing agent in the spheroidizing bag (outside the induction furnace carburizing) or desulfurization bag (outside the cupola furnace carburizing) for carburizing treatment. Ductile iron production furnace carbon, recycled iron in the cupola and induction furnace, scrap iron and scrap steel melting into the original molten iron, the original molten iron temperature is 1460-1500 as an import cupola desulfurization bags or induction furnace spheroidizing bags, and monitoring device to detect the original the carbon content of molten iron, according to compared with the standard of product carbon content, the difference with a low sulfur graphite recarburizer added.



Using low sulfur containing 95% carbon, sulfur 0.05% graphite carburant, into bags, bags carburization when low sulfur graphite recarburizer absorption rate is around 90%, use the following two kinds of furnace smelting carburization when use induction furnace spheroidizing package a, carburization, spheroidizing when feeding into method in nodularizer side to low sulfur graphite carburant, spheroidizing reaction using the original molten iron billow effect, stirring, To promote low sulfur graphite carburizer diffusion absorption. B, the cupola desulfurization bag carburization, in the desulfurization bag filled with nitrogen, stirring effect, promote the diffusion absorption of low sulfur graphite carburizer.