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前言 破碎作业广泛地应用在国民经济各部门,完成破碎工作的破碎机械则是选矿、水泥、耐火材料、选煤、道路建筑、石油、化工及陶瓷等工业不可缺少的重要设备之一。 在现代选矿厂中,用于破碎(不包括磨矿)之费用通常占全部生产费用的20％左右;而破碎设备之投资则占总投资的30％左右;因此,改进破碎设备、寻求新的破碎方法是破碎设备研究中的重要课题。 近年来,世界各国正在研究各种新型破碎机械,反击式破碎机就是其中之一;在反击式破碎机中,双转子反击式破碎机目前正开始被广泛研究和采用。
Foreword The crushing operation is widely used in various departments of the national economy. The crushing machinery that completes the crushing work is one of the indispensable important equipments for mineral processing, cement, refractories, coal preparation, road construction, petroleum, chemical industry and ceramics. In modern concentrators, the cost for crushing (not including grinding) usually accounts for about 20% of the total production cost; and the investment in crushing equipment accounts for about 30% of the total investment; therefore, the crushing equipment is improved and new ones are sought. The crushing method is an important issue in the research of crushing equipment. In recent years, various countries in the world are researching new types of crushing machinery, and impact crushers are one of them. In the crushers of impact crushers, crushers with double rotors are currently being researched and adopted extensively.