Coffee Etc.
The simplest and easiest thing to do is obtain a seiving screen testing unit as this will screen your product and be able to obtain your data very easily to give you several sizes of product to compare with little effort.
www.hogentagler.com ■
Re: Density Prediction
I think that it will be difficult to construct a theoretical model to predict the density of mixtures with differing particle size distributions. Shear cell testing will not offer a contribution to such an objective, although a load compaction graph is a useful indication of how the strength of a bulk product is likely to change with consolidation, if that is of interest.
It is not clear what processes are referred to in your query, but if the particle size is affected by the operation then the composition of the inital raw materials is not relevant to the final product. A product with particle size greater than 100 microns would normally be free flowing so it should be practical to conduct a series of trials blending various 'mixes' of know composition and build a data base of results that may serve your purpose.
Density may be important to issues of packing, in which case I would recommend the book by Grey on 'The packing of Particles' for an indication as to how the bulk density depends on the particle size composition. ■
Density prediction
Dear Lyn,
I have been very interesting in your forum and I was wondering if you could give me some information regarding the project I am working on.
I am working in a company manufacturing some cappucino (particles sizes > 100 microns) and I would like to build a predicting model of the final density of the mixes. This would be based on:
1-A lab work predicting the density of the bulk by measuring the density of each raw material by free flowing method.
2-Correcting the values by assessing a corrective factor linked to the factory process.
My questions are the following:
1-Is it actually possible to build such a model?
2-Do you think that it would be helpful taking some measures with Peschl Shear Cell on different points of the process to assess the influence of the process on the density?
3-Is the composition-ratios of raw materials a parameter that I should consider?
I thank you very much in advance for your help,
Kind Regards,
Xavi ■