HP-DHK mndandanda wawiri wosanjikiza preheating makina okanda (Invention patent No.: ZL 2009 1 0014580.9) imachulukitsa kuchuluka kwa kupanga, kupulumutsa 50% yamagetsi, ndi 50% zida invest.Mu 2009, idavomerezedwa ndi China Carbon Viwanda Association, odziwika bwino Shenyang Aluminium Magnesium Design Institute Co., Ltd., Guiyang Aluminium Magnesium Design and Research Institute Co., Ltd., ndi akatswiri angapo zoweta odziwika bwino mpweya kutenga nawo mbali pa kuwunika chigawo ndi unduna kupindula sayansi ndi luso.The awiri wosanjikiza preheating kneader ndi woyamba wa mtundu wake zapakhomo ndi kunja, kufika mlingo kutsogolera mayiko a mankhwala ofanana.