Device for producing granules

 

(57) Abstract:

The device relates to mechanisms for processing clay with subsequent granulation. The technical result - the device allows you to prepare a raw material to obtain granules with subsequent granulation. The device consists of two discs coaxially rotating forming the cage with your fingers. At the edges of the disks installed ring 3 with an adjustable gap. 1 Il.

The invention relates to mechanisms for processing clay with subsequent granulation, the device can be used in other industries for processing of plastic materials in order to obtain granules.

Question pellet production in the ceramic industry is not resolved at the appropriate level. The use of perforated rollers, belt presses, allows to obtain granules, but a large enough size and obtain granules with a diameter of 0.5-13,0 mm is mainly decided by drying and crushing the clay, followed by sieving.

The disadvantage of this method is the large dust content up to 30%, a significant variance in size, and the granules have sharp edges, which are prone to destruction in the process transactionsin way quite effectively, virtually no, or they are extremely inefficient.

Famous pocket cage mill, consisting of two discs-baskets mounted on shafts rotating in opposite directions. For drives mounted in 2-3 series of concentric circles cylindrical fingers, arranged so that each row can freely enter between the two rows of the other. The processed material is fed through the hopper to the center of the disk. During the rapid rotation (up to 1200 rpm) baskets pieces of crushed material receive blows, knocking them on the fingers of one series to the fingers of the counter number to the periphery of the disks, the result is thrown away (see Burlakov, S. fundamentals of engineering ceramics and artificial porous aggregates. -M.: Higher school, 1972). The cage mill is used for crushing coal, diatomite, and other materials having a small hardness. In the pocket disintegrator possible treatment of the clay with the aim of crushing and producing pellets, but the clay granules with natural humidity do not have simple forms and large variance in size, and also at the exit of the cage due to centrifugal forces stick and enough commersonia on the cover of the cage. As a result of these weeks ineffective.

The technical result - the device that allows you to obtain granules with a diameter of 0.5-3.0 mm, rounded, with a slight variance in diameter. This technical result is achieved in that the raw material is rolled between two rotating disks with the appropriate clearance.

The invention is illustrated in the drawing, which depicts a granulator. The pellet contains two disks 1 coaxially rotating, while at the center, they form a pocket of the cage with 2 fingers, destroying large chunks. At the edges of the discs 1 set of ring 3 with an adjustable gap 4.

Granulator operates as follows. Clay goes through the center of the disk in the cavity formed by the discs 1 and 2 fingers, due to centrifugal force 1 and force of gravity, depending on the angle of inclination of the disks to the force vector of gravity falls on the fingers 2, rotating in different directions with respect to the motion vector of the material, crushing and fall into the gap formed by the plot And where the disk surface has a curved shape that allows you to break the lumps, without clogging the space between the disks and smoothly flowing to the rings, where the clay is rolled, getting a rounded shape in a certain interval on delendam temperature range.

Practice showed the following variation in the diameter of the granules of 0.5-1 mm - 71,8%, 0.25-0.5 mm - 20,3%, less than 0.25, i.e. dust fraction - 7,83%.

Thus, the use of the proposed device will allow you to effectively obtain granules to 1.2 mm of clay plastic method, not requiring pre-treatment of the clay, which will reduce the energy intensity of the raw-material stage. And also provides undoubted convenience in the further use of the pellets, because they are rounded, and therefore will reduce dust, improve the conditions of heat treatment due to the small difference in size of the granules. The above advantages allow efficient use of pellets in the production of articles by hot pressing, as digidrirovanny additives, to carry out heating, calcination of the pellets in a fluidized bed and other

Device for producing granules, consisting of two rotating disks mounted on them with your fingers, characterized in that the edges of the disks installed ring with an adjustable gap.

 

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5 cl, 1 tbl, 1 dwg, 8 ex

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