Shaker is fine ore sorting apparatus reselection efficient, widely used tungsten, tin, tantalum, niobium and other rare metals and precious metal ore sorting, but also for Fe, Mn ore sorting, in recent years, has also been reported The iron minerals in the tailings of the magnetic separation plant and the non-metallic minerals such as mica are recovered by a shaker.
Advantages of shaker beneficiation : 1 The ratio of rich ore ( ratio of concentrate grade to ore grade ) is higher than many other beneficiation methods, up to more than 100 times; 2 qualified concentrates and abandoned tailings can be obtained in one selection; 3 The ore is fan-shaped on the bed surface for easy observation and adjustment. 4 The products can be separated and separated separately according to the needs, and various products can be obtained. 5 No consumption of chemicals, and little power consumption. Disadvantages of shaker beneficiation: 1 Large area; 2 Large water consumption; 3 Unit area of ​​bed surface treatment capacity is low.Globe valve, also known as cut-off valve, is a mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the top of the valve stem will occur. According to the connection method, it is divided into three types: flange connection, thread connection and welding connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. decrease. At the same time, under the action of the medium, this form of valve is also tighter. my country's valve "Three Chemicals" once stipulated that the flow direction of the globe valve should be from top to bottom. When the globe valve is opened, the opening height of the valve disc is 25% to 30% of the nominal diameter. The flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve disc.
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