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Air Classifying Mill (ACM)

RIECO’s Air classifier Mill (ACM) is an air classifying mill with integrated grinding, classifying, conveying, and collecting operations for achieving ultra-fine grinding (up to 2 micron*) depending upon the nature of the product.

Air classifying Mill / Air classifier Mill (ACM) can be designed for grinding hygroscopic, heat sensitive and explosive materials in inert gas/ closed loop systems with dry chilled air. Our classifiers are engineered to consistently produce steep particle size distributions that are uniform and homogeneous.

Working Principle

The material to be grinded is conveyed from the hopper to the grinding zone by the variable feed screw mechanism. The grinding occurs when the product meets a pin or bar type rotor disc. As particles are reduced in size they are entrained by the Air stream which enters below the rotor and are carried up between the inner wall and shroud ring with baffles, the particles are then deflected by an air dispersion ring to the separator assembly. Acceptable product is drawn through the exhaust and is collected by a high efficiency bag filter. Oversize particles are carried downward by internal air classifier and return to Rotor for additional grinding.

Technical Specifications

Mill	Main Motor HP	Rotor RPM	Classifier Motor HP	Classifier RPM
ACM 5	5	9400	1	5400
ACM 10	10	7000	1.5	5000
ACM 30	30	4600	7.5	2500
ACM 30 (ID)	30	5000	7.5	3000
ACM 60	60	3000	15	2000
ACM 60(ID)	60	3500	15	3000
ACM 75(ID)	75	3500	15	3000
ACM 75(ID)	75	3500	15	3000
ACM 100	100	3000	15	2000
ACM 100(ID)	100	3500	15	3000
ACM 5	5	9400	1	5400
ACM 120	120	2200	20	1800
ACM 150	150	2200	25	1800
ACM 200	200	2200	40	1800
ACM250	250	2200	40	1800
ACM300	300	2200	50	1800
ACM400	400	1500	100	400-1800
ACM500	500	1500	125	400-1800

Features

Modern, Economical, simple
High Pressure Mills for dust explosive materials
Closed Loop systems in inert atmosphere for explosive, heat sensitive and hygroscopic materials.
Heat Exchanger based cool grinding system for non-explosive heat sensitive material.
Grinding and Classifying in one machine with online granulation adjustment.
Dust free Operation
Uniform particle size distribution with narrow bandwidth.
Mills can be provided with Online classifier (Micron separator) to further achieve sharp particle cut point

Low specific energy requirement
ACM variant with Independent Drive classifier wheel available for sticky materials.
All RIECO ACM mills are equipped with protection devices for safe operation. These measures include a safety switch on the cover of the grinding chamber. It is thereby ensured that the drive motors cannot be switched ‘ON’ when the grinding chamber cover is open
The plant is supplied along with a control panel and MCC which provides the necessary interlocks and operating switchess
The mill and all drive components are mounted on a rigid welded stainless steel frame. All rotating parts are dynamically balanced for smooth operation. There is no need for special foundation.

Construction

As the Air Classifier Mill Manufacturer, we include the following in our ACM Plant:

ACM Mill for grinding and classifying.
High efficiency bag filter with automatic pulse jet cleaning
Rotary Airlock (used for air seal and discharge material from bag filter)
Centrifugal Fan (provide air flow through the mill and the collector for product conveying and cooling.)
Control Panel (sequential starting and stopping of the milling plant)