Ball mill should keep even feeding in operation;  the even feeding means stable feeding quantity and same particle size  distribution.

Unsuitable feeding would make the product  size become bigger, and bring more return capacity, which cause  "bloated" phenomenon for grid type ball mill. It also means overload  of the ball mill. Under this situation, the operation voice sound dull and  weak, which means lost the grinding function. At the moment, operator should immediately  reduce or stop the feeding, and improve the overflow concentration. Feeding  again after the normal work is resumed

Inadequate feeding would make the product  size become smaller, and bring less return capacity, which cause the impact  between linear and steel ball. The extra impact will lead to consumption  increasing.

Feeding size increasing or decreasing also causes  the same results as feeding capacity when the feeding capacity is fixed.

Only even feeding and size will bring good  production indexes. We should pay attention to these two factors

The even feeding keeping mainly depends on the  constant observation of operating personnel.  The problems generally occur in the handover, so some places should be  carefully checked, including main bearings and transmission bearing; transmission  system of classifier and feeder operation; the amount of lubricating oil; situation  of grinding medium; reserves in ore bin, the mill discharge, classifier overflow  and sand return. Only checking carefully can ensure the smooth operation of the  ball mill, and reach a stable production target.

• PRE

  All slime cyanidation-countercurrent method is successfully applied to a gold mine

  The original beneficiation process of the gold mine was all slime cyanidation CIP process. Because  of the change of mining method, the mud content reached more than 15%, which  makes the leaching period longer and limited processing capacity; the flotation  recovery rate decreased; the production cost became higher. Xinhai needed to change  the process to reduce the cost. After contracting this gold reconstruction  project, Xinhai decided to take the test with all slime  cyanidation-countercurrent washing-carbon solution method, because the required leaching ore particle of this new process is larger than the process of  original process.The problems of all slime cyanidation CIP process This process required the leaching ore  granularity is fine, -200 mesh accounted for 85%, but the gold mine granularity  is coarse, and the mill processing capacity is limited resulting in the entire  gold processing decreasing, and the cost of ore dressing increasing; secondly, carbon leaching carbon was weared seriously reaching 120g/t according to Xinhai  Research Institute testing; so the overall economic benefits were low. The all slime cyanidation-countercurrent  washing-carbon solution method designed by Xinhai Mineral Processing Research  Institute adopted classifying control and thickening before leaching. The  details of the test as follow

• NEX

  Guide Book of all kinds of crushers

  The crushers below are widely used in mineral processing industry. The more users know them, the higher efficiency they bring.