黏土旧砂完全再生技术.pdfVIP

学兔兔 黏土I El砂完全再生技术 闫敬光’，孙清洲’，杨忠耀 ，张普庆 ，靳 立 ，杜 航 (1．山东建筑大学山东省铸造清洁生产工程技术研究中心，山东 济南250101； 2．莱州新忠耀机械有限公司，山东 莱州 261400) 摘要：分析了旧砂中黏土膜的分离机制，采用不同的再生工艺评估了黏土旧砂再生技术的可行 性，确定了7 00℃焙烧+机械再生+微粉分离的黏土旧砂完全再生工艺，研究了黏土完全再生 砂的工艺适应性，并介绍了黏土砂完全再生系统的组成。结果表明，视不同的型砂工艺，黏土 完全再生砂可分别用于混制水玻璃砂、覆膜砂、冷芯盒砂或热芯盒砂，但不能用于自硬呋喃树 脂砂的制备。 关键词：黏土砂；旧砂再生；型砂性能 中图分类号：TG221 ．2 文献标识码：A 文章编号：1673-3320(2014)04—0001-06 Full Reclamation Technology of Used Clay-Bonded Sand YAN Jingguang’，SUN Qingzhou’，YANG Zhongyao ，ZHANG Puqing’，JIN Li’，DU Hang’ (1．Shandong Engineering Research Center of Cleaner Produ~ion for Foundry，Shandong Jianzhu University，Jinan 250101，Shandong，China；2．Laizhou Xinzhongyao Machinery Co．，Ltd．， Laizhou 261 400，Shandong，China) Abstract：The separation mechanism of clay film for used sand was analyzed．The feasibility of reclamation technology of used clay—bonded sand was evaluated with different reclamation process， and the full reclamation technology of clay—bonded sand with firing at 700℃ mechanical reclamation and micro．grains separation was determined．The process adaptability of full reclaimed clay sand was explored．and the composition of full reclamation system for clay—bonded sand was introduced．The results show that depending on different sand process．the ful1 reclaimed clay sand can be respectively used in mixing sodium silicate sand resin coated sand，cold box sand or hot box sand，but its not suitable for the preparation of self-hardening furan resin sand． Key words：clay—bonded sand；sand reclamation；sand properties 黏土砂铸造是常用的铸件生产方法，采用 会污染江河湖泊，甚至污染生活水源，废砂中的 黏土砂工艺生产的铸件占铸件总量的60％。据统 粉尘随风飘扬，会造成空气污染，因此，黏土废 计，我国每生产1