About The Flowsheet Of Beneficiation Process

As for beneficiation process, generally adopts primary grinding and secondary grinding

, do like this can make ores grinding to any size you needed and reduce unnecessary cost. More over secondary grinding mainly depends on the requirement of choosing in different stage.

Now, primary grinding flowsheet compared with secondary grinding flow sheet, the main advantages are:

Less equipment, lower investment, operate simply, it will not appears that one grinder lay off will have influence on another grinder, like this can make the loss for lying off cut down. But there is a bad situation, the range of feeding size of mill is wide, like that, make more difficult that reasonably put ball into mill and can't easy obtain fine material, which will get lower benefit. The largest size of final products between 0.2 to 0.15 mm, factory always adopts primary grinding flowsheet.

The outstanding advantages are:

Applicable to stage process specially and make it possible that get finer products, and do coarse grinding and fine grinding in different stage for grinding. In big and medium-size factory, if the fineness of grinding ore less than 0.15 mm, it is economic to adopt secondary grinding and the size of products is uniform.

According to the different connection of the primary grinding and classifier, the secondary grinding flowsheet can divided into 3 types: the first is all opening flowsheet; the first is all closing flowsheet; the first is partly closing, the secondary is partly closing.

Autogenously grinding flowsheet:

A: Those crushing and grinding equipment, autogenously grinding, fine crushing, ball mill, gravel grinding, etc, always work together, on the base of different connection, it can form a variety of process.

B: Autogenously process has wet and dry types grinding. Generally speaking, most beneficiation factory put to use wet grinding. In order to solve the wear-resistant grain in autogenously process and improve grinding efficiency, if put a small number of steel ball, we called it semi-autogenous grinding.

by: jocelyn

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