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一、前言我国某些砂金矿,采用采金船开采和洗选,山于洗选流程简单,设备又较陈旧,以致选金指标较低。洗选流程包括入选前的准备作业和分选两部分。准备作业包括碎散和洗矿筛分,往往采用圆筒筛一次完成。圆筒筛筛上产品作为废石丢弃,筛下产品则进入分选流程。分选流程一般为一次粗选、一次精选和一次扫选。粗选、扫选均采用固定溜槽(也有用跳汰机扫选的)。扫选尾矿作最终尾矿丢弃,粗选精矿经人工清溜富集(即在船上的精选)后,再送到岸上精选车间进一步处理,得出金砂。
I. Preface Some of the gold and gold mines in China adopt the mining and washing of gold mining vessels. The mountain has a simple process of washing and selection and the equipment is outdated, resulting in a lower gold standard. The washing process includes pre-selection preparation and sorting. Preparatory work including crushing and washing screening, often using a cylindrical sieve to complete. Drum sieve products as discarded as waste stones, sieve products into the sorting process. The sorting process is generally a rough selection, a selection and a sweep. Crude selection, scanning are used fixed chute (also useful jig selection). Scalping tailings for the final tailings discarded, rougher concentrate enrichment by artificial cleaning (that is, the selection of the ship), and then sent to shore intensive workshop for further processing, come to gold sand.