利用磁滑轮串联干选，第一道磁滑轮干选保抛尾8％-10％、第二道磁滑轮干选保回收率大于98％，将改造后干选设备和工艺嵌入现有的三段一闭路破碎筛分工序中。

Magnetic pulleys are used in series for dry separation, with the first pass dry separation to ensure a 8%-10% tailings discarding and the second pass to ensure an over 98% recovery.

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答：先化验以下铁含量，如果铁含量高，可以采用磁滑轮抛尾。

Answer: the first to assay the following fe content, if iron content high, can use magnetic pulley cast the tail.

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这个洞你看到的是为尾座浇道洞，滑轮的浇口是不可见图片。

The hole you see is the sprue hole for the tailstock, the pulley's sprue is not visible in the picture.

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