subject: The Prospect Of The Classifier Is Optimistic [print this page] . The classification size is determined by the speed of the upflow velocity of the lower inclined plate. When it is used for the classification of the material of 0.28mm, the comprehensive classification efficiency of the two boxes up and down is kept around 80%. The inclined plate of the device is mainly used to uniformly distribute the upward flow. The packing plate distance is 100-200mm and the length of the plate is 400-600mm.
The spiral classifier is one of the common equipment in flotation separating process. And it is the key equipment in flotation separating process. Because the solid proportion is different, the precipitation speed of solid in fluid is different, which is the mechanical classification principle of the spiral classifier. At present, Henan Hongxing Mining Machinery Co., Ltd. mainly produces and sells two types of spiral classifier, one is the single spiral classifier and the other is the double spiral classifier. Customers can customize the spiral classifier with different models and different sizes according to the actual requirements.
The advantages of the spiral classifier are: stable and reliable performance, easy-to-operate, can be connected with the ball mill without pump. The biggest spiral classifier specification made in China is 3.0 m, can reach artesian connection with 3.6m x4.0 m ball mill. The big volume of the spiral classifier has buffer action and plays the role of transporting material, while the return concentration can be as high as 65% to 80%, thus good for the grinding operation. The disadvantage of the spiral classifier are: heavy body, large footprint, big maintenance workload, and difficult to achieve automatic control; affected by the density and shape, the material cannot be precisely classified according to particle size, resulting in low classification efficiency, typically only 20% to 40%; overflow particle size depends mainly on the concentration adjustment, usually the most detailed up to -0 074 mm.
The thickening or classification equipment of the aforementioned old inclined plate ( inclined tube) relies on the shallow subsidence to shorten the falling distance and falling time of the particles, which can significantly improve the handling capacity of per unit area of the equipment that once formed a high tide of the promotion and application at home and abroad. However, with the extension of the usage time, the drawbacks of such devices are gradually becoming apparent, which mainly show uneven fabric between the board. In addition, the bond slime on the board cannot decline freely so that the gap between the boards is blocked, which affect the normal production until it cannot be used.
(1) High weir spiral classifier. Usually used in the first-section grinding compatible with mill.
(2) Submerged spiral classifier. Usually used in the second-section grinding and form a unit with mill.
(3) Low weir spiral classifier. Generally used for washing or dehydration, is rarely used at present.
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