Increasing Powder Bulk Density

Posted in: , on 23. Feb. 2009 - 23:14

I am looking for ways to increase the bulk density of a powder. The particle size averages 5 - 15 microns and I am trying to load a cylinder that is about 2 cu.ft (~11" diameter). The settling time for this material is quite high and I need a way to compress/compact/deaerate the powder in a reasonably short time frame. Any suggestions would be greatly appreciated.

Re: Increasing Powder Bulk Density

Posted on 24. Feb. 2009 - 10:08

From what you have told us the problem is similar to the proverbial quart in a pint pot. Getting a bigger pot is the easiest solution.

Re: Increasing Powder Bulk Density

Posted on 24. Feb. 2009 - 12:50

Fill the cylinder under vacuum?

If the cylinder can withstand the vacuum.

(like a pack of vacuumed coffee)

teus

Teus

Re: Increasing Powder Bulk Density

Posted on 24. Feb. 2009 - 09:35

Not quite the quart in the pint pot problem; I wish it were that simple. The cylinder is quite porous, so the powder goes through it easily. Options under consideration so far are isostatic pressing, the vacupress from Grenzebach, vacuum packing into bags first. I'm sure that there are things I'm missing.

Re: Increasing Powder Bulk Density

Posted on 9. Apr. 2009 - 11:51

Dear Sir,

I am from Genzebach BSH, did you in the meantime solved your problem with your powder ?

We can offer you a free of cost pre compaction test for your powder.

Best regards,

Holger Höck

www.grenzebach.com

Bulk Density

Posted on 14. Apr. 2009 - 03:16

There is a fine balance between poor flow and excess dilatation when handling fine powders. The simplest way to avoid entraining air during filling is to feed down an incllined chute of curved cross section to an inclined pot to allow progressive build up and venting. However, the prior handling and feed control is sensitive in order to secure the best bulk state control so the dispensing device is crucial to good performance. Pouring from a bag will give feed and control problems Unfortunately, small applications of this nature rarely merit the degree of technical attention required to produce optimum results. If viable, a well designed screw feeder would offer a good solution.

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Posted on 15. Apr. 2009 - 10:38

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