山东建筑大学学报2016，Vol.31Issue(6)：543-548,6.
含冷芯盒芯砂粘土砂的完全再生砂改性技术研究
Modification technology of total reclamation sand reclaimed from the used green sand containing cold box resin sand
摘要
Abstract
Compared with the properties of the same base sand,the total reclamation sand reclaimed from the used green sand containing cold box resin sand are found that the AFS fineness is not changed much,the grain shape is near round,the mud content is lower,the acid demand value is higher,the strength of the cold box resin sand is lower than.Improving the casting technique properties of the cold box resin sand mixed by the sand reclaimed from the used green sand containing cold box resin sand,the modification technology of the total reclamation sand is researched.When the total reclamation sand is prepared with “added acid +drying +mechanical rubbing +separation of micro-powder”modification technology,the acid demand value of the reclamation sand is much lower than before modification has improved significantly.When the modifier concentration is 3 mol/L,the amount of modifier putting into the reclamation sand is 1% of the reclamation sand weights,the laid up time after adding modifier is 60 minutes,the instant tensile strength is 1 .282MPa and the 1 h tensile strength is 1 .538MPa of the cold box resin sand mixed by the reclamation sand.The instant tensile strength and the 1 h tensile strength is best and near the tensile strength of the cold core box resin sand mixed by the base sand.关键词
粘土砂/冷芯盒/完全再生砂/改性Key words
green sand/cold box resin sand/reclamation sand/modification分类
矿业与冶金引用本文复制引用
孙清洲,郝学杰,杜航,孙益民,许荣福,任文成..含冷芯盒芯砂粘土砂的完全再生砂改性技术研究[J].山东建筑大学学报,2016,31(6):543-548,6.基金项目
山东省科技发展计划项目 （）
