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旧砂的利用,历来就是铸造生产中人们关注的重要问题。近年来,由于对环境和生态认识的不断深入,特别是对经济效益的追求日益讲究综合的效果。这个问题,就越来越引起人们的重视。“1992年北京国际铸造、锻压、工业炉及冶金装备展览会”,国内外铸造装备制造厂商推出的新的旧砂再生设备,内容新颖,足以反映出对这一问题重视的程度。旧砂再生的广义内容是:破碎,过筛,磁选,脱膜,分级,调温和除尘。其中脱模是核心,脱膜方法分干法、热法和干热混合法三大
The use of old sand, has always been an important issue casting people in the production of concern. In recent years, due to the continuous deepening of environmental and ecological awareness, the pursuit of economic benefits has increasingly paid attention to the comprehensive effect. This problem has drawn more and more attention. “1992 Beijing International Foundry, Forging, Industrial Furnace and Metallurgical Equipment Exhibition”, domestic and foreign foundry equipment manufacturers to launch a new sand recycling equipment, content novel, enough to reflect the extent of attention to this issue. The general content of the old sand regeneration is: broken, sieved, magnetic separation, stripping, grading, temperature and dust removal. One of the stripping is the core, separation method dry method, thermal method and dry-hot hybrid method three