The Double Shaft Mixer Machine amagwiritsidwa ntchito popera njerwa zopangira njerwa ndikusakaniza ndi madzi kuti apeze zida zosakanikirana zofananira, zomwe zimatha kupititsa patsogolo magwiridwe antchito azinthu zopangira ndikuwongolera kwambiri mawonekedwe ndi kuumba kwa njerwa.Izi ndi oyenera dongo, shale, gangue, ntchentche phulusa ndi zina zambiri ntchito zipangizo.