Application Of Spiral Classifier In Sand And Gravel Industry

The spiral classifier is one of the equipment for mineral processing. The spiral classifier is a kind of equipment that uses the principle that solid particles have different specific gravities and different sedimentation speeds in liquids to perform mechanical classification. It can filter the powder ground in the mill, and then use the spiral vanes to rotate the coarse material into the mill feed port, and discharge the filtered fine material from the overflow pipe.

1. Sand and gravel desludging and screening

The spiral classifier can be used for desludging and screening of sand and gravel, and can wash the dirt and ash on the materials into clean materials. In the construction of some large hydropower projects, a large amount of pure sand and gravel is needed as building materials. The spiral classifier can effectively remove the dirt from the sand and gravel and improve the quality of the sand and gravel.

2. Sand and gravel classification

A. Particle size classification

In the sand and gravel production process, the spiral classifier can classify sand and gravel of different particle sizes based on the difference in sedimentation velocity caused by factors such as the specific gravity and size of the solid particles. For example, large-grained sand and gravel can be separated from small-grained sand and gravel to meet the requirements of different engineering construction projects on sand and gravel particle size. For example, when building a bridge, larger-grained sand and gravel may be needed to ensure the stability of the structure, while when building a house, more small-grained sand and gravel are needed.

B. Combined with a ball mill for classification in closed circuit

In the ore dressing plant, the spiral classifier is used to form a closed loop with the ball mill to separate the ore sand. In this process, the spiral classifier can classify the materials ground by the ball mill. The coarse materials are screwed into the feed port of the mill by the spiral blade, and the coarse materials are ground again, while the filtered fine materials are discharged from the overflow pipe. Improve the efficiency of the entire production process and product quality.