Conical mill
Encyclopedia
A conical mill is a machine used to reduce the size of material in a uniform manner. It is an alternative to the hammermill
or other forms of grinding mills
.
The conical mill operates by having the product being fed into the mill by gravity or vacuum. A rotating impeller forces the material outward to a conical screen surface, where it is sized and passed through the openings in the screen. Once finished, the product simply drops through the milling chamber to a receptacle underneath.
Conical mills come in a variety of sizes from tabletop lab models to full-size high-capacity machines for use in processing large quantities of material, and the impeller and screen can be customized for each individual use. The machines can be used not only to reduce the size of particles, but also for deagglomeration, sieving, dispersion, and mixing.
The applications for a conical mill are varied, but trend towards use in the food, cosmetic, chemical, and pharmaceutical industries:
The conical mill has some marked advantages over the hammermill, especially in the pharmaceutical industry: low noise, heat and dust, a more uniform particle size, flexibility in design, and higher capacity.
The concept of the conical mill was created in 1976 by the engineers of Quadro Engineering, who remain the foremost manufacturer of conical mills. Other companies such as L.B. Bohle have improved from the original conical mill concept and now offer equipment such as the BTS-100 & BTS-200 turbo conical mills with greater product throughput and excellent product size distribution. These mills are available in Ex- execution with a variety of sieves and impellers. The mill head is mounted on a mobile lifter which allows for easy up and down movement for docking into containers, tablet presses and others. The mill head is dismounted from a lifter for easy cleaning.
Hammermill
A hammermill is a machine whose purpose is to shred or crush aggregate material into smaller pieces. These machines have many sorts of applications in many industries, including:*Ethanol plants...
or other forms of grinding mills
Mill (grinding)
A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are many different types of grinding mills and many types of materials processed in them. Historically mills were powered by hand , working animal , wind or water...
.
The conical mill operates by having the product being fed into the mill by gravity or vacuum. A rotating impeller forces the material outward to a conical screen surface, where it is sized and passed through the openings in the screen. Once finished, the product simply drops through the milling chamber to a receptacle underneath.
Conical mills come in a variety of sizes from tabletop lab models to full-size high-capacity machines for use in processing large quantities of material, and the impeller and screen can be customized for each individual use. The machines can be used not only to reduce the size of particles, but also for deagglomeration, sieving, dispersion, and mixing.
The applications for a conical mill are varied, but trend towards use in the food, cosmetic, chemical, and pharmaceutical industries:
- Reclaiming broken pharmaceutical tablets by grinding them back into powder for re-forming.
- Sizing wet granulated particles before drying, and sizing dry granulated particles after they've dried before tabletting.
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The conical mill has some marked advantages over the hammermill, especially in the pharmaceutical industry: low noise, heat and dust, a more uniform particle size, flexibility in design, and higher capacity.
The concept of the conical mill was created in 1976 by the engineers of Quadro Engineering, who remain the foremost manufacturer of conical mills. Other companies such as L.B. Bohle have improved from the original conical mill concept and now offer equipment such as the BTS-100 & BTS-200 turbo conical mills with greater product throughput and excellent product size distribution. These mills are available in Ex- execution with a variety of sieves and impellers. The mill head is mounted on a mobile lifter which allows for easy up and down movement for docking into containers, tablet presses and others. The mill head is dismounted from a lifter for easy cleaning.
Sources
- Pharmaceutical Dosage Forms - Details the advantages of conical mills in pharmaceutical industries
- Fexofenadine Composition and Process for Preparing - Describes how a conical mill works
- Informa Healthcare - review of a conical mill and its suitability in pharmaceuticals — study of a conical mill's ability to size wet and dry granulates