Cooling attachment for a grinder

Details Cooling attachment for a grinder Cooling attachment for a grinder

1996-04-15

1998-07-07

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

With temperature modification of material

B02C 2318

Patent

active

057756066

ABSTRACT:
In essence, my design for cryogenic grinding and controlling the temperature of grinding makes use of liquid nitrogen, heated in thin-walled metal containers by the room temperature air. The nitrogen gas (or liquid) is conveyed by tubes to a cylinder cover fixed on top of the grinder's grinding chamber. The cover allows sufficient heat transfer and prevents producing static electricity by the spinning particles, and also prevents nitrogen from forming a liquid layer on the bottom of the cover. In my design: 1. The driving force of gas or liquid nitrogen is provided from the heat transferred between the liquid nitrogen in the containers and room temperature air, which creates pressure; 2. The temperature of grinding can be controlled by changing the flow rate of the room temperature air and by putting on or removing the rubber safety plug of one container; 3. Circulating the cold nitrogen by gas natural convection to cool down the motor allows continuous grinding. With Yang Cooling Attachment, the time needed to grind particles is reduced from a matter of days to matter of hours|

REFERENCES:
patent: 5431348 (1995-07-01), Orsolini et al.

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