... 3.Well after-sales service... Henan HanHe AAC Block Production Line AAC Block Production LineAAC is made from silicon material (silica sand, or ... as a by-product from other processes, e.g. foundry sand or burgee from glass grinding, provided the levels of alkalis or ... , No.5, HuiGuoZhenIndustryArea, GongYiCity, HeNanProvince, China Henan HanHe AAC Block Production Line