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
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.
  • Delumping dry detergent
    Detergent
    A detergent is a surfactant or a mixture of surfactants with "cleaning properties in dilute solutions." In common usage, "detergent" refers to alkylbenzenesulfonates, a family of compounds that are similar to soap but are less affected by hard water...

     during production
  • Dispersing pearl
    Pearl
    A pearl is a hard object produced within the soft tissue of a living shelled mollusk. Just like the shell of a mollusk, a pearl is made up of calcium carbonate in minute crystalline form, which has been deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other...

     into blush
    Rouge (cosmetics)
    Rouge , also called blush or blusher , is a cosmetic typically used by women to redden the cheeks so as to provide a more youthful appearance, and to emphasize the cheekbones....

     and face powder
    Face powder
    Face powder is a cosmetic powder applied to the face to set a foundation after application. It can also be reapplied throughout the day to minimize shininess caused by oily skin. There is translucent sheer powder, and there is pigmented powder. Certain types of pigmented facial powders are meant...

  • Deagglomerating dried fruits such as raisin
    Raisin
    Raisins are dried grapes. They are produced in many regions of the world. Raisins may be eaten raw or used in cooking, baking and brewing...

    s or cranberries
    Cranberry
    Cranberries are a group of evergreen dwarf shrubs or trailing vines in the subgenus Oxycoccus of the genus Vaccinium. In some methods of classification, Oxycoccus is regarded as a genus in its own right...

    .
  • Creating breadcrumbs from scraps


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

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK