Rice Husk Pellet Mill

Raw Materials And Ash Content

For all kinds of pellet mills, including rice husk pellet mill, the raw materials’ ash content is a concern, as—at the end-user level—not all boilers can handle high ash-content pellets. More maintenance is required for the utilization of high ash biomass fuel, which is in fact one of the characteristics of pellets composed of agricultural materials such as rice husk. So before buy a rice husk pellet mill, you should know about the potential of rice husk pellets and hence the feasibility of establishing a profitable pellet plant.

Although agricultural raw materials vary greatly in their chemical compositions, most contain higher traces of silicon, calcium, potassium, chlorine and sulfur, thereby resulting in a lower melting point of the ash and increased degradation of the boiler. Rice husk for example:

(Below is a brief description of rice hulls. The detail information of rice husk can be found on wikipedia - http://en.wikipedia.org/wiki/Rice_hulls )
Rice husk is also known as chaff, hull and husk. Rice husk is the covering of protection encasing a rice grain. These yellowish rice husks with a convex shape are a little larger than a grain of rice (lengths up to 7mm; Dimensions a normally 4~6mm). Rice husk is lightweight, having a ground bulk density of 340kg/m3 to 400kg/m3.

Rice husks possess high silica content. This means it is very abrasive and is the reason why rice husk pellet mill is not that popular as wood pellet mill. It destroys the pellet die very rapidly. We have yet to see a genuine operational rice husk pellet mill, despite adverts on the website offering rice husk pellets. Altocraft is working on solutions to this with leading pellet mill manufacturers and suppliers.

Rice husk is kind of agriculture waste that farmers were struggling finding ways to dispose in the past because of the large volume (its volume is about 20% of total rice crop). Today it is a traded commodity with a growing variety of uses. You may have heard that rice husk is free. It can be. At a rice farm hundreds of kilometers from a port, away from roads and rivers, and up a hill. So if you have a rice husk pellet mill, you totally don’t need to worry about the source of raw material. Anywhere else farmers sell it to pellet making factories, and factories have to collect it via truck or more typically barge, transport it to mills, clean and grind it, pack it, transport it to port, and load it. The cost of this (transport & energy) forms the majority of the cost.

Interested in rice husk pellets or rice husk pellet mill? Contact us for further details!

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