Posted on April 12, 1999 at 07:46:52:

As a pneumatic conveying system manufacturer, we have a pneumatic conveying database of thousands of different material tests. If we have a good description of the material (particle size, estimated distribution, bulk density, and material composition), we can search our database for a similar material. We then use this test data from the similar material to develop the conveying parameters for your application (rate, distance, degradation or wear limits, etc.). We can then apply a safety factor to the design depending upon your confidence in the material description you provided us.

So, if you would like to entertain a proposal for a conveying system for your material, please feel free to contact me. ■

Posted on April 12, 1999 at 23:40:58:

PIAB is a world wide provider of vacuum conveying and has great experience in conveying products in the form of powders and granulates. We have a data base with evaluated tests on different kind of metal products like: Metal flakes, metal powders, metal granules and so on. PIAB vacuum conveyors are made of stainless steel to withstand virtually any corrosive material and if the substances are harmful, they can be reliably isolated from the surroundings. Two important thing for us to know is:

1. Conveying distance and capacity. The sum of the horizontal as well as the vertical distances and the capacity in tons/hour.

2. Material classification. To sum up, the following point should be included in the material classification:

Fluidity/angle of repose

Bulk density

Abrasion factor

Particle -size

-distribution

-form

-density

-hardness

Moisture sensitivity

Explosion hazard

Harmfulness/poisonousness

PIAB develops and markets vacuum products designed to simplify, speed up and improve the profitability of industrial processes. Our expertise is acknowledged in many countries, and our vacuum products are of the highest standard.

Best regards

Markus Tell

Product Manager

PIAB Vacuum Conveyors ■

Posted on April 16, 1999 at 08:28:43:

In Reply to: Pneumatic conveying of granulated matte posted by Tertius Baard on April 12, 1999 at 00:49:44:

Interesting question - we at The Wolfson Centre for Bulk Solids Handling Technology have conveyed hundreds of materials and have found that general information about material of a given "name" is often not relevant to another, nominally similar, product. For that reason, using information from a database is very dangerous as it can often lead to a misdesign. We usually undertake a conveying test with a sample of the material in question, and use the resulting data for design - that is safer. If you are interested in this approach, drop me an e-mail. ■