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一、概述 矾山磷矿是在我国北方发现的第一个中低品位大型内生磷铁矿床。矿石中有用矿物为氟磷灰石、磁铁矿;其次有钛铁矿、黄铁矿、黄铜矿、磁黄铁矿、镍黄铁矿、方铅矿等。脉石矿物主要为辉石、黑云母、长石、方解石、钛榴石、绢云母等。早期形成的氟磷灰石常被后期形成的辉石、磁铁矿、黑云母等矿物包裹,粒度为0.05～0.3毫米左右;晚期形成的氟磷灰石嵌布在辉石,黑云母等矿物集合体的间隙或片理中,它的嵌布粒度98％以上大于0.074毫米;磁铁矿的粒度也较粗,其中94％以上大于0.074毫米。 我们在1978年矾山磷矿选矿厂初步设计中,碎矿工段采用粗、中、细三段闭路破碎筛分流程。磨矿工段采用MQG2700×3600湿式格子型球磨机与2FLG—2000型高堰式双螺旋分级机构成一段闭路磨矿分级流程。浮选工段为一次粗选、一次扫选、二次精选,全部采用6A浮选机构成浮选流程。
First, an overview of Fanshan phosphate rock is found in northern China, the first low-grade large-scale endogenous phosphorus iron deposits. Minerals useful minerals for the fluorapatite, magnetite; followed ilmenite, pyrite, chalcopyrite, pyrrhotite, pentlandite, galena and so on. Gangue minerals are mainly pyroxene, biotite, feldspar, calcite, garnet, sericite and so on. Early formation of fluorapatite is often later formed by pyroxene, magnetite, biotite and other minerals, particle size of about 0.05 ~ 0.3 mm; late formation of fluorapatite embedded in pyroxene and biotite and other minerals In the gaps or flats of the assembly, its embedded grain size is more than 98% and more than 0.074 mm; the magnetite size is also coarse, of which 94% or more is larger than 0.074 mm. In 1978, we first designed phosphate ore beneficiation plant, broken section with coarse, medium and small closed-circuit crushing screening process. Grinding section with MQG2700 × 3600 wet lattice type ball mill and 2FLG-2000 type weir double spiral classifier into a closed-circuit grinding process. Flotation section for a rough election, a sweep election, the second selection, all using flotation mechanism into a flotation process 6A.