一、工作原理

盘式离心选金机属重选设备，机器主体是一个锅状园盘，由中空轴支撑和动力带动旋转。矿浆经砂泵输送到选盘中心处，矿粒同时受到重力和惯性离心力作用。在矿粒沿盘面中心向上运动的过程中，当角度大于45⁰时，沿坡度方向离心力分力逐渐变小，重力分力逐渐增大，当上升到某一高度时，二力达到平衡，在平衡点附近容易形成重砂沉积层。尾矿从盘上部边缘排出，精矿在停止给矿后（停机）加水冲洗由中空轴排出。

二、用途

本机器主体结构参照澳大利亚矿产公司克努森KNUDSEN淘金技术参数，主要淘洗 -4mm以下沙金，可回收15um以上的自然金粒，操作时，中心内孔用塞封堵，定期排发收集。工作时边加矿边加水，可间断作业或连续作业。旋转方向为逆时针转（见示意箭头）。转速为70-110r·p·m。矿浆固液比为1/4-2/3。本机器可单机电动作业，多台组合作业或脚踏式（无电源时）作业。

三、技术参数

四、操作事项：

1、据电机接盒上示意图接线，确定转盘工作方向（逆向针转）。

2、接通电源试车，无异常声音，即可加入矿料工作，定期排放收集精矿。

3、每工作十天，定期给减速器注入机油。详见注油孔及油位。

4、严防电机周围矿浆或水分渗透入。

I. Working principle:

Tray Type Centrifugal Gold Separation Machine as heavy medium separation appliance, is supported with hollow shaft and driven by power, with its major part being of cauldron disk. Slurry is transferred via slurry pump to the separation disk center where ore grains are acted by both gravity and inertial centrifuging force. During the course of movement by the ore grains upwards along the center of disk surface, when angle is greater than 45 degrees, the centrifugal component force in the direction of slope will gradually decrease while gravity component force will gradually increase. When it is up to a certain level, the two forces will reach balance, and near the point of balance easily develops a heavy mineral sediment layer. Tailings are discharged from edge at the upper disk, and concentrates after stop of feeding ( shut-down), are washed with water before being drained by hollow shaft.

II. Application

The major structure of the machine follows the technical data about gold washing from KNUDSEN, Australian mining company. The machine is primarily applied for washing and separating placer gold at a size of minus 4mm and is capable of recovering natural gold grains at sizes of over 15 um. In operation, inner hole of the center is blocked using plug with its drainage and collection at a regular basis. It can be operated intermittently or continuously, with the ore feeding and water adding simultaneously. The rotation direction is anti-clock( as indicated by arrow) at a speed of 70-110 r/pm. Ratio between solid and liquid for slurry is 1/4-2/3. The machine can be operated by power individually and multi-machines also can be operational in a combined or pedal manner ( without power supply ).

III. Technical Data

IV. Items of operation

1.  Make wiring as indicated in the Junction Box of motor and define the working direction of the disk

2.  Energize for commissioning, add ore feed when no abnormal noise is heard, and discharge and reclaim concentrates regularly.

3.  Add engine oil to speed reducer periodically at an interval of every 10 days as per oil injection hole and oil level.

4.  Prevent motor from being infiltrated by its surrounding slurry or water moisture.

V The machine has been applied in batches in amphibious mobile gold ore washing ground owned by a mining company in Mongolia