I-HP-DHK series double-layer preheating preheating machine (Invention patent No.: ZL 2009 1 0014580.9) iphinda kabini ukusebenza kwemveliso, igcina i-50% yombane, kunye ne-50% yotyalo-mali lwezixhobo.Ngo-2009, yamkelwa yi-China Carbon Industry Association, i Shenyang Aluminium Magnesium Design Institute Co., Ltd., Guiyang Aluminium Magnesium Design and Research Institute Co., Ltd., kunye neengcali ezininzi zasekhaya ezaziwayo-kabhobho ukuba bathathe inxaxheba kuvavanyo lwephondo kunye nomphathiswa zenzululwazi kunye nobuchwepheshe impumelelo.I-double-layer preheating kneader iyona yokuqala yohlobo lwayo kwizindlu zasekhaya nakwamanye amazwe, ukufikelela kwinqanaba elihamba phambili leemveliso ezifanayo.