MR Series Twin Hammer Mill

Equipment Specifications

The TRM series twin hammer classifying mill is composed

of a twin vertical milling assembly and a high efficiency

classifier, all in a single compact machine.

The degree of fineness of the end product ranges between

8 and 150µm, starting with a maximum material inlet

particle size of 15 mm and a maximum hardness of

around 4 Mohs, but can be adapted for materials with a

hardness of 5 Mohs with specific anti-wear materials.

The product is fed into the milling chambers where the

rotor discs where the particles impact against each other

and against the mill liner. To maximize the efficiency of

the grinding action, the material is subjected to collision,

friction and cutting in the space between the hammer

plates on the rotor disc and the mill liner.

The milled product is conveyed via an extraction fan to

the high-efficiency dynamic classifier. In the classifier,

the oversize material is sent back into the mill chamber

and subjected to an additional milling cycle. Only the

product with the correct fineness is allowed into the

transport tube, resulting in high milling efficiency.

Operating Principle

Twin rotor discs of the TRM Series Hammer Mill

Milling Process

Choosing a suitable grinding technology is governed by

knowledge of the physical and chemical properties of a

material and its behavior during micronization, features

which determine production capacity and, ultimately,

particle-size distribution. Every mineral, beginning with its

natural location of extraction, down to its unique

properties, has to be understood in this context. STM,

with its experience gained over years of testing, grinding,

and selecting materials, provides critical support to each

customer’s needs.

Products and Particle Sizes

Technical Data –MR Series Screen Mill

Mill Series MR - 400

Operational Advantages

•  Compact design

•  Reduced space requirements

•  Ease of installation

•  Low-maintenance

•  Energy efficient

•  Fully adjustable particle size output

•  Fully automatic operation

The TRM Series Twin Hammer Mill is suitable for

virtually any industry where very fine sorbent milling is

required, including minerals, chemical, power,

incineration and food, and for any material with a

moisture content of less than 2% and a maximum

material hardness of 4 Mohs.

The TRM Series Twin Hammer Mill is perfectly suited for

milling of Trona for large gas flow applications, such as

power plant DSI, due to its low capital and maintenance

cost.

Product particle fineness D97 is 8-120 micron.

STM Mill Series

Installed Power

Absorbed Power

Hourly Production

Feed Size

Particle Size* Airflow Pressure Collecting

Filter Noise Level

type size kW kW Range kg/hr mm µm m3/h mm H2O m2 m2

RTM 800 125 112.5 100-1400 < 15 D90 < 20

12000 1000 55 55 D50 < 5

RTM 1000 200 181.8 100-1800 < 15 D90 < 20

20000 1000 91 91 D50 < 5

* Data Reference: Calcium Carbonate

Experience

STM EcoSystems • 216 US Hwy 206 • Hillsborough • NJ

E-mail: info@stmecosystems.com Http: www.stmecosystems.com

JCF Hammer Mill (Particle size database available ):

Clay Sodium Carbonate Aluminum Hydroxide Ferrous Sulfate

Bakelite Activated Carbon Wood (chipped) Antimony Sulfide

Bauxite Mineral Carbon Lithopone Molybdenum Sulfide

Bentonite Choline Chloride Mica Muscovite Talcum

Sodium Bicarbonate CMC Soft mineral oxides Rare Earths

Hydrated Lime Cromite Lime Oxide Potassium Titanate

Kaolin Feldspar Magnesium Oxide Wollastonite

Barium Carbonate Fluorine Zinc Oxide Sulfur

Calcium Carbonate Natural Graphite Perlite

Magnesium Carbonate Synthetic Grafite Pyrite