Gravity separation of gold

重选是选金最古老、最普遍的方法之一。在砂金矿中，企通常是呈单体自然企形态存在，密度一般大于16t/m3，与脉石密度差大，因此重选是选别砂金矿最主要、最有效最经济的方法。但在脉金选厂，重选则很少单独使用，多作为联合提金流程的一部分，一般是在磨矿与分级回路中，采用跳汰机或螺旋溜槽与摇床配合，提前回收己解离的粗粒单体金，以利于其后的浮选或氰化作业，并可获得合格的金精矿。这种方法在小型金矿和地方群采矿山用得较普遍。

Gravity separation is the most ancient gold, one of the most common ways. In placer gold deposit, business is usually a single natural enterprises form, density is generally greater than 16t/m3, and the big density difference, so gravity is chosen don't placer gold most the most effective, the most economical method. But in the vein gold concentrator, gravity is rarely used alone, much as part of a combined gold extraction process, is generally in the grinding and classification in the loop, jig or spiral chute and the table with the use of recycling, has the dissociation of coarse monomer gold, in order to facilitate the flotation cyanide or job behind, and can get gold concentrate qualified. This method in a small gold mines and local groups with more common.

重选选金的主要设备是各种形式的溜槽、跳汰机和摇床。除常规重选设备外，根据我国金矿的生产特点，在消化、吸收国外先进设备基础上，我国研制了皮带溜槽、罗斯溜槽、圆形跳汰机、砂金离心洗选机组等新型重选设备，在黄金生产中已取得良好效果。软覆面溜槽还用来处理浮选或混汞尾矿，以提高金的回收率。

For major equipment of gold is chute, various forms of jig and table. In addition to conventional gravity separation equipment, according to the production characteristics of gold deposits in China, absorbing foreign advanced equipment in the digestive,, we developed the Ross belt chute, chute, the jig, the centrifugal washing unit model of gravity concentration equipment, has achieved good results in gold production. Soft cladding chute for flotation tailings or amalgamation, in order to improve the recovery rate of gold.