MTW series trapezium mill

The MTW Series Continental Trapezoid Grinding mills are mainly applied to the powder processing of mineral products in the industries of mining,metallurgy,chemical,and contruction materials,etc. They can produce powder from various non-flammable and non-explosive mineral materials with Mohs hardness below 9 and humidity below 6% ,such as quartz,feldspar,calcite,talcum,marble, ceramics ,iron mine,soft coal ,dolomite,active carbon,plum sandstone,basalt,etc.

Working Principle

1)Raw material which has been crushed to the size specified is elevated into a hopper from which the stuff is loaded. And then through the vibrating feeder ,the materials will transferred evenly and continuously into the grinding chamber for powder-processing. After this,the ground stuff is carried by the air from the blower into the classifer for regrinding.The set’s airflow system is closely sealed up and circulated under the condition of negative and positive pressure.

2) The grinder is driven by rotation of the central axle through decelerator ,with the up end of the axle connecting to a quincunx-rack upon which the grinding equipment is fixed. The whole set equipment  turns together with the axle along the grinding ring while the rollers rotate driven by the fractional force .A set of shovel are installed at the lower end of the quincunx-rack.While turning together with the rollers ,the shovels shed the stuff onto the gap between the rollers and the ring ,and that’s where the stuff layer forms .The rotating rollers ,while turning together with the ring ,grind the stuff layer into powder.

3) The turning speed of the impeller can be adjusted to the requirement of the fineness of powder products .

4)It plays an important role in ensuring the function of the grinder . As the high-speed revolving air current mixed with ground stuff is flown into the cyclone-collector ,the ground stuff is separated from the air-current .

Structure Features

1) The MTW series mills adopt bevel gear integral transmission,and features a compact and vertical structure, main unit ,as well as an evenly transmittion.
2)The important parts adopt high-quality steel ,which optimizes the appearance
3)The electric system adopts centrallized control ,and features high degree of automation .and the size of the vibrating feeder is small and light ,which is controlable and energy-saving .

Technical Advantages

1)Main shaft transmission: MTW series mills adopt bevel gear integral transmission ,which will better compact the whole structure , simplify the installation as well as improve the efficiency.The traditional mill needs decelerator and ratcheting to drive the main shaft that increases the installing difficulty and is easy to bring noise and reduce the efficiency.

2) Inner lubrication system: MTW series mills adopt light-oil lubrication to achieve the lubrication between the main bearing and gear bearing, without oil pump or lubrication station. The traditional mills’ lubrication adopts grease lubrication which increases the resistance of lubrication, creates high inherent temperature and shortens the service life of bearing.

3) Arc whirl tube: MTW series mills adopt arc whirl tube to reduce the resistance and avoid the air-stop and so on. The traditional mills adopt board-type whirl tube that increases the resistance, reduces the performance, and stops the air flow and so on.

4) Curved surface shovel with changeable edge: The traditional mills adopt quick wear edge and edge is combined with shovel. If the edge is worn, all of the shovel should be changed ,which increases the cost and the off time. The edge of MTW series mill adopts wearable alloy materials which improve the service life. The Changeable edge is easy to change ,which saves time and cost. The traditional flat shovel make the materials accumulate in one level,which reduces the ring and roller’ service life. The curved surface shovel makes a vertical material liner ,which increases the working face and capacity.

5) Insolating type cyclone collector: Adoption of the insolating structure between the inner core and mixed air flow improves the classifying efficiency and precision. While the traditional one do not have the isolating structure.

6) non-resistance inlet shell: Traditional observation door of shell protrudes that makes the inner surface is not so smooth that it will bring eddy effect and increase the consumption. MTW series mill adopts the same curved surface which avoids the eddy effect.

Technical Data: