Kann man ein Pulver „pumpen“?

Ist es möglich, ein Pulver auf die gleiche Weise zu "pumpen", wie Flüssigkeiten gepumpt werden können?

Wenn ja, was sind die Herausforderungen? Wenn nicht, welche Alternativen gibt es?

I believe it's termed "injecting" not "pumping" but yes, it's certainly possible.

Kohlekraftwerke zerkleinern die Kohle zu sehr feinem Staub und blasen den Staub in den Zentralbrenner.

Dieser besondere Artikel is a summary of some DOE research for a Blast Furnace Granulated Coal Injection System Demonstration Project.

In diesem Artikel werden einige der Gefahren aus Sicht der National Fire Protection Association erörtert. Kohlenstaub mit der besonders gefährlichen Eigenschaft, explosiv zu sein und all das ...

Ich vermute, dass die spezifischen Gefahren in Abhängigkeit von den im Pulver enthaltenen Materialien variieren werden.

While pumping powders as a mix with swiftly moving gas is viable, one of frequently used alternatives for both powders and granular materials is Archimedes' Screw.

Essentially, a helix in a diagonal pipe making the material "pour/roll" upwards the curve, allowing lifting it a long distance. This solution is frequently used in farming equipment for transporting grain or granulates. While it doesn't provide "pressure" for moving it through inert pipes, a "pipeline" of such screws can go a long way, and while it restricts transport angle, it provides a viable alternative especially for heavier materials where extreme air flows would be required to move them.

You may also look into pneumatic conveying. It involves fluidization of the particles.

This simply uses pressure differential to move any bulk material. It's used a lot in industrial applications. You can read a summary of those systems, here.

There is a key difference between liquids and powders:

• Liquids have internal cohesion and can be sucked, but with a powder, you need a carrying medium.
• The internal friction in a powder will usually be far higher than in a liquid.

In practice, this means that to pump a powder, you inject air or another gas as fluidizing agent. The pumped or blown air carries the powder, like a dust-storm within the pipe.

In food process you can "pump" powder with vacuum, sugar works very well, and some other products need sometimes some technical adjustment (pression or open/close cycles valves) . But water in the pipes is ban and last point it's only for small quantities and short distance 20meters max i think.

You can pump both liquids and powders into a "mold" using injection molding.

It works more easily with liquids, but it can also be done with small particles such as powders that are injected into heated molds with sufficient force.

We have dry cement bulkers truck running on local roads, feeding dry cement to mixer factory where it is turned into wet mixed cement. Pump air into the truck to 'blow' cement out.

This video shows cement and sand are 'blow' by air. Powder (cement/sand) are placed in closed container. Air blow in and powder come out on, says, 2 to 3 inch diameter, tubing. Powder can be transferred in construction site, at horizontal and vertical distance of tens of meters. You can see the blue air-compressor in the video. Here is a similar video.

Yes you can pump powders using a diaphragm pump. The above comments all focus on alternate ways to transport powder they are not talking about pumping. Check out powder pumping with a diaphragm pump on youtube.