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Dry grinding system and dry grinding method

A crushing system, dry technology, applied in chemical instruments and methods, solid separation, separation of solids from solids with air flow, etc., can solve the problems of reduced efficiency of fine powder classification, reduced productivity, etc.

Inactive Publication Date: 2007-06-13
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, however, the fine powder contains a large amount of too fine particles, so that the classification efficiency of the fine powder decreases, resulting in a decrease in productivity

Method used

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  • Dry grinding system and dry grinding method
  • Dry grinding system and dry grinding method
  • Dry grinding system and dry grinding method

Examples

Experimental program
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Effect test

no. 1 example

[0067] Next, a dry pulverization system and a dry pulverization method using the dry pulverization system according to a first embodiment of the present invention will be described with reference to FIG. 1 .

[0068] As shown in Figure 1, the dry pulverizing system of the present embodiment includes: a pulverizing device 20 for dry pulverizing the material 10 to be pulverized; The first classification device 30 of the fine powder 31 of diameter and the coarse powder 32 with larger average particle diameter; For the coarse powder 32 that obtains from first classification device 30 is further classified into the fine powder 51 with smaller average particle diameter And have the second classifying device 50 of the coarse powder 52 of larger average particle diameter, if necessary, second classifying device 50 comprises the fine powder 51 that obtains from the second classifying device 50 and further classifies to have smaller average particle diameter A classification device (not...

no. 2 example

[0125] Next, a dry pulverization system and a dry pulverization method using the system according to a second embodiment of the present invention will be described with reference to FIG. 3 . The components corresponding to the first embodiment use the same reference numerals, and repeated descriptions will not be repeated.

[0126] The difference between the dry pulverization system of this embodiment and the first embodiment is that the system includes a third classifying device 80 for further classifying the fine powder 51 obtained from the second classifying device 50, and the fine powder 51 is in the It is not collected in the embodiment, but is classified into a fine powder 81 with a smaller average particle size and a coarse powder 82 with a larger average particle size, and the third classification device 80 will obtain from the third classification device 80 if necessary. The fine powder 81 is further classified into a classification device (not shown) with a smaller a...

Embodiment

[0132] The present invention is further described by way of examples.

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Abstract

The invention provides a dry grinding system including grinding means for dry-grinding a material to be ground; first classification means for classifying a ground product obtained through the grinding means, into fine powder having a relatively small average particle size and coarse powder having a relatively large average particle size; second classification means for further classifying the coarse powder obtained through the first classification means, into find powder having a relatively small average particle size and coarse powder having a relatively large average particle size; and returning means for returning to the grinding means the coarse powder obtained through the second classification means. The invention enables production of a powder product having a desired average particle size at high efficiency.

Description

technical field [0001] The present invention relates to a dry pulverization system suitable for producing abrasives or fillers; and a dry pulverization method using the system. Background technique [0002] Generally, clay powders such as alumina powder or corundum used as abrasives or fillers are produced by pulverizing raw material powders having a large average particle diameter (grain size). Pulverization methods are roughly classified into batch pulverization methods and continuous pulverization methods. The continuous pulverization method is roughly divided into an open circuit pulverization method and a closed circuit pulverization method. Among these pulverization methods, the continuous pulverization method, especially the closed circuit pulverization method, is widely used due to its high pulverization efficiency. The pulverization method includes a dry pulverization method and a wet pulverization method. When a dry product is to be obtained by a pulverization m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/08B02C17/00B07B1/00B07B7/00B07B9/00B03C1/00B02C23/14B07B9/02
CPCB07B9/00B02C23/08B02C23/14B07B9/02
Inventor 富川伸一郎宫泽宏和
Owner RESONAC HOLDINGS CORPORATION