чистота восстанавливается агент

For the past few years , reply to the problem that the steel material surface is scarce which caused by mishmashes . For this reason , we carry on all kinds of researching and development which aim at dissolve and clean the steel technology . The technique in the past dissolve steel twice called vacuum cast method . (for example , RH and DH method) . For high Sol[Al] steel and steels C content higher than 0.05% , RH and DH method can meet general requirements ; however , for low Sol[Al] steel and steels C content lower than 0.05% , the afore-said two methods are not ideal and PRA needs to be used . The time , used the clinker improvement to pay off medicinal preparation,developed the technology of picking up the converter clinker quality . The result is that it can ensure raise up the pure steel .