固定筛是筛面固定不动的筛分机械。多用格栅筛,有时也用板筛。倾斜放置,物料倾于高端,在自重作用下沿筛面滑下,小于筛面缝隙或筛孔的颗粒通过筛面达到分级。 筛面的倾角与物料的静摩擦角有关,一般倾斜角为35°~45°,粘性物料可达50°左右。结构简单、坚固、不需动力,但生产能力低,筛孔易堵、效率低,仅适用于粒径50mm左右的粗筛。
实践表明,采用消失模铸造生产的固定筛篦条产品表面质量、 性能指标均能保证使用要求。
Practice prove, application of casting technique of lost pattern in production of agglomeration machine trail fixed screen grate, its surface quality and pe…
采用USY、REY和REHY分子筛为催化剂,在固定流化床上进行了催化裂化(FCC)汽油改性试验。
Upgrading of FCC gasoline was investigated in a fixed fluidized bed microreactor over USY, REY and REHY.
以炼油厂催化裂化汽油轻馏分为原料,在固定床微型反应器中对几种分子筛催化剂的醚化活性进行了考察。
Etherification activities of various molecular sieve catalysts were investigated with FCC light ends as feedstock carrying on a fixed bed micro reactor.
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