PENDULAR RING ROLLER MILL TYPE "PD.1504 - PD.1200"

FEATURES
For fine grinding of chemical products and minerals of medium hardness and abrasiveness
Product fineness adjustable in the range 20- 400÷micron

Low specific production cost, due to:
• Low energy consumption
• Reliable operation
• Automatic control
Efficient drying by blowing hot gas through the mill
Dust free operation in open or closed air circuit depending on specific application

WORKING DIAGRAM

1)FEEDER
2)GRINDING ROLLERS
3)GRINDING RING
4)SUCTION BLOWER
5)AIR CLASSIFIER
6)COLLECTING FILTER
7)AIR HEATHER
8)SILENCER
9)CHIMNEY

WORKING PRINCIPLE
The raw material is fed into the grinding chamber at controlled rate by the feeder (1). Grinding is mainly by compression of product layers due to the centrifugal force of the pendulum rollers (2) along the fixed ring (3).
The ground product is drawn upwards by the blower (4) and classified by the air separator (5), on the top of the mill.
The coarse particles fall again into the mill, while the fine product is discharged pneumatically and collected by the filter (6)
The clean air is exhausted through the chimney (9) and the silencer (8) in compliance with the environment regulations.
When necessary hot gases (7) are blown through the mill for a very efficient drying (950÷1000 Kcal/kg H2O evaporated) thank to very intensive heat exchange.
An advanced control system automatically regulates all working parameters to provide the best performance.

RANGE OF APPLICATION
VERSATILITY
Fineness control 4 models of air classifiers interchangeable

Single cone classifier
Fineness range 200÷500 micron, cut size precision. 90÷95%

Double cone classifier with adjustable vanes Fineness range 200÷400 micron, cut size precision 93÷98%	Dynamic classifier mod. CEPA Variable speed drive. Fineness range 40÷400 micron. Cut size precision up to 99,8%

Cage type dynamic classifier Variable speed drive. Fineness range 20÷100 micron, cut size precision up to 99,8%	Operation under inert gas.

The ROLLER MILL can operate in closed circulation of inert gas, controlled by suitable safety equipment.
In these conditions the Roller Mill can process materials, such as sulphur, subject to explosion when in contact with standard air.

Removal of impurities
The machine can be fitted with devices for removing impurities that may be present in the material to be ground; these devices act on the different grindability and density of the impurities compared with the principal product.
EXAMPLE
• Separation of hard impurities from talc
• Separation of quartz from clays or kaolin

APPLICATIONS
CIMMA pendular roller mills are used in hundreds of plants producing ceramic pressed tiles (gres, single fired, double fired), extruded floor tiles, klinker, roof tiles, flower pots. Inert raw materials can be ground mixed with clays. The requested granulometry is easily obtained with the proper choice and regulation of the air classifier. Check screening of the product is usually not necessary.
The ceramic bodies prepared with Pendular Roller Mills provide ceramic products with high mechanical properties and very smooth surface, free from defects. Clays with moisture up to 10÷12% are easily processed at full capacity and competitive cost with the introduction of hot gas through the mill.

RAW MATERIALS

Mining industry	Chemical industry	Miscellaneous
• Talco • Limestone • Marble • Dolomite • Baryte • Colemanite • Kaolin • Bentonite • Magnesium oxide • Phosphates • Gypsum • Lime	• Sulphur • Insecticides • Fertlizers • Titanium dioxide	• Coal • Graphite • Petroleum coke • Scraps of tobacco.

TECHNICAL CHARACTERISTICS

		PD 1200	PD 1503 - PD 1504
	mm	15 ÷ 30	15 ÷ 30
Diameter of grinding ring	mm	1200	1500
Number of grinding rollers		3	3         4
Installed power
Mill	Kw	45	90
Suction blower	Kw	37 ÷ 55	90 ÷ 110
Dynamic classifier	Kw	4 ÷ 7,5	7,5 ÷ 11
Weight of mill+ classifier	Kg	9000	15000
Drying capacity	max kg/h H20	400	1100
Capacity
Capacity:
Clays and ceramic bodies minus 300 micron	t/h	4 ÷ 8	12 ÷ 22
Limestone minus 100 micron	t/h	3 ÷ 6	5 ÷ 10
Talc, kaolin minus 30 micron	t/h	1,5 ÷ 2,5	2,5 ÷ 6
Noise level (1m) without noise insulation system	db	85	85

*The noise level could change depending on the working conditions.



Data and features may change without any previous advice

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