Who knows the proportion of pig iron and coke used in cupola?
Blank export rate: raw materials into melting after the formation of blank, under normal circumstances, the common casting investment for every 1 tons of pig iron, scrap steel and other major raw materials, the lowest to 85% iron, after casting output blanks, nozzle, nozzle, riser, riser for smelting iron ratio of about 30% pieces of standard blank; the export rate, nozzle, riser re melted continue after put into use; production enterprises invested 1 tons per dryer, iron scrap and other major raw materials to the lowest 85% of the hot metal, roughly the same with ordinary casting, casting blank after the (standard yield) for hot metal ratio is about 70%, accounting for the proportion of the molten iron outlet riser about 15%, nozzle, riser also re melted after continued use.
Auxiliary material input: auxiliary material for foundry industry, mainly coke. Ordinary casting (except dryer) 1 tons to 5 tons cupola, each investment 1 tons of coke, according to the situation can be 4.5 tons to 5.5 tons. Ordinary blank (special pieces extra), 5 tons to 10 tons per 1 tons of coke in cupola furnace about 6.5 tons to 7.5 tons of blank (waste products re melted are calculated according to the above method).There is a doubt: rough parts output is too low, is abnormal.
Raw material input: the main raw materials for casting are pig iron, scrap steel, ferromanganese and so on. Normally, after melting, the proportion of pig iron and scrap steel is about 9:1, and the proportion of pig iron and scrap steel is about 6:4 in the dryer enterprises, and ferromanganese is put into the product according to the requirements. Because pig iron and scrap carbon content is not the same, pig iron containing higher carbon content, about 4 to 4.3, scrap carbon content is low, about 0.8.There is a doubt: if the proportion of scrap input is too large, easy to increase processing difficulties, product quality can not be guaranteed. The proportion is too high or too low is abnormal.
