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前言以往洗选矿石、煤炭或碎石等所使用的筛子,大多采用金属制成的筛网。这种筛网具有价格便宜、通用性好、开孔率高等优点,但也有筛孔易堵塞、使用寿命短、噪音大等缺点。近些年来,一个特别明显的趋向是,橡胶筛网正在逐渐取代金属筛网。然而,橡胶筛网的筛孔仅局限于4毫米以上,否则就会出现筛孔严重堵塞、影响使用寿命等问题。因此,筛孔为3毫米以下的橡胶筛网,至今在生产中仍未获得实际应用。
Foreword In the past washing ore, coal or gravel sieve used, mostly made of metal mesh. This kind of screen has the advantages of cheap price, good universality and high opening rate, but it also has the disadvantages of easy blocking of sieve, short service life and high noise. In recent years, a particularly clear trend is that rubber screens are gradually replacing metal screens. However, the rubber sieve mesh is limited to more than 4 mm, otherwise there will be serious sieve blockage, affecting the service life and other issues. Therefore, the sieve is less than 3 mm rubber screen, so far in the production has not yet been in practical application.