mineral processing technology and mineral processing equipment

In the beneficiation plant , it is very important to control the grain size in the stage of crushing and grinding. Especially in metal mines such as iron ore processing line and gold mining equipment , grain size control plays a decisive role in the subsequent stage of selection. A few typical granularity control schemes and their characteristics are described below. 1.Crushing circuits - open screening • Screening ahead of a crusher avoids packing • Less wear in the crusher • Higher total capacity • The screening media is “controlling” the product in two dimensions. No “flaky shortcuts”. Fig1. crushing-open screening 2. Crushing circuits-closed screening • The screens are lowering the capacity • Calibration of the product is improved • Better cubical shape • Higher reduction ratio Fig2.crushing-closed screening 3.Grinding circuits-screening • Used for “trapping critical sizes” in AG - SAG circuits (1) • Used for taking ...

1. Classifier in grinding cycle In the grinding cycle, a classifier, a hydrocyclone or a screen are needed to connect with a mill to form a unit. The function of the grading equipment is similar to the effect of the sieves in the crushing process, such as pre grading and grading, and overflow control classification. 1.1. Spiral classifier The most commonly used classifier is a spiral classifier, which is divided into three kinds: high weir, low weir and sunk type. According to the number of spiral , it can be divided into single spiral and double spiral classifier. Spiral classifier with a sloping semi cylindrical trough 2, tank equipped with one or two spiral 3, it is the role of the sand pulp stirring and transported to the upper end of the chute. The spiral blade is connected with the hollow shaft, and the hollow shaft is supported in the bearings at both ends of the upper and lower sides. The transmission device is installed in the upper trough, the spiral bevel gear ...