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Double Stream Mill, type PSKM & PPSM

Gentle pulverizing of dry or moist, soft to medium hard materials. Cool grinding at high throughput capacities with narrow particle size distribution.

Method of Operation

With the PALLMANN double stream mill the feed material is reduced through a new, pioneering principle. The fan effect of a multiple wing impeller pulls the feed material centrally into the grinding chamber passing through a special feed chute designed as a gravity separator for heavy material. An especially designed material guiding cone distributes the material evenly on the periphery and the entire width of the grinding track. The impeller, rotating at high speed, produces high air turbulence between the impeller wear plates and the serrated profile of the grinding track.

The double stream guides the feed material through this intensive turbulence in axial direction or in the cross stream depending on the profile used on the grinding track. The material is reduced in high velocity air stream by repeated impact onto the impeller wear plates and the grinding track profile. Through the air guide and within the flow channels of the grinding track a cross-stream sifting is achieved. Discharging of finished product takes place only after the dragging force of air exceeds the kinetic rebound energy applied to the particles. In the area of this actual flow the percentage of mechanical friction is extremely small resulting in an extended service life of impeller wear plates and refining elements.

Advantages & Features

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Homogeneous material preparation

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Low specific power requirements

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High throughput capacity

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Adaptable for different materials

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Easy adjustment of required fineness

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Easy exchange of wear parts

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Very low maintenance cost

Applications

Double Stream Mills, type PSKM are air-swept mills for gentle pulverizing of dry or moist, soft to medium hard materials.  They are used for fiberizing of cellulose materials, wood and annual plants.

They ensure cool grinding at high throughput capacities with narrow particle size distribution.

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Chemicals

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Pharmaceuticals

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Foods

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Minerals

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Cellulose

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Wood

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Plastics

Technical Specifications

Type

PSKM

6-350

8-460

10-530

12-600

14-660

15-720

Scale-up Factor

f

0.6

1.0 1.3 1.6 2.3 3.4

Diameter of the grinding track

mm

600

800 1000 1200 1400 1500

Width of the grinding track

mm

120

150 180 210 230 250
Width of the screen rings mm 2x100 2x140 2x160 2x180 2x200 2x220
Recommended motor kW 55-75 90-110 132-200 200-315 250-400 315-500
Air displacement approx. m3/min 75 100 130 150 200 250

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2009 PALLMANN Industries, Inc.
PALLMANN Industries, Inc.
36 Atlantic Way, Clifton, New Jersey 07012 - USA
Phone: (973) 471-1450 - Fax: (973) 471-7152
Email: info@PallmannIndustries.com