| |
| Staying tuned up with time and technology for over 35 years, We at LEW aspire to give our customers best solution, better products and services. We strive hard to contribute substantially to the global priority areas of energy conservation and environment protection. For saving energy and achieving good quality products, we have developed a FOUR ROLLER MILL and a CLASSIFIER for it which ensures consistent output upto 500 Mesh. |
| |
| PRINCIPLE |
| Material is ground by pressure friction between stationary bull ring and the rotating rollers, which swing outwards due to the centrifugal force. |
| |
| OPERATION |
Material to be ground is fed to the grinding chamber through star feeder. The positioning of the ploughs ensures that the material continuously passes between the rotating rollers and the stationary bull ring and as such this brings about grinding process.
The ground material is swept by the ascending stream of air and carried to the classifier. Over sized particles are returned by the classifier to the grinding chamber for regrinding. The desired product is carried to the cyclone. The final product is collected at the bottom of the Cyclone while the Air having fine dust is discharged from the Top of the Cyclone and the Dust laden air goes to the Dust Collection Unit where the dust is separated and clean Air is discharged in the Atmosphere. |
| |
| DESIGN |
- Mill
 The Mill foundation houses the drive gear-box which incorporates a thrust bearing to support the central shaft and endures the roller loads. The grinding rollers are hinged on the spider. The roller assembly is uniquely designed to prevent the possible entry of fine powder. A perfect ball bearing with neoprene rubber seal is incorporated to prevent the entry of dust to the roller arm assembly. The contact area between roller arms and bull ring is maintained in such a way to achieve uniform and gradual wear & tear of the Roller.
- Classifier
The Classifier helps to obtain any mesh size upto 500 mesh by increasing or decreasing the RPM of the Whizzer Classifier through a Variable Speed Drive Motor. A knob is provided to adjust the required mesh. This helps in saving a lot of time, money & Energy. A Gear Box is mounted in the Classifier driven by 15 HP Electric Motor which ts designed in such a way to prevent entry of the dust in the Gear Box.
- Blower
The Fan casing is made from 5 mm M.S. Plate and suitable base is mounted with casing for the Electric Motor ami bearing Housing. The Base is made from 8 mm thick plate. The M.S Fabricated impeller is fitted on the shaft and shaft is mounted with Mono Plumber block and bearings. The double wall impeller provided is dynamically balanced. The blower is driven through a V-belt transmission with the help of Electric Motor.
|
| |
| CONSTRUCTION |
| The ploughs are cast out of Manganese Steel while the rollers and the bull ring are of Carbon Steel Casting. Classifier, Cyclone, Dust Collector, Blower, Dusting & supporting structure are made of Mild Steel sheet and structural. Heavy duty Base Plate, Shell and Gear Box are made from Cast Iron and Mill Shell Body is single piece casting. |
| |
| DRIVE |
| The Induction Motor through V-belt drives the Gear Box, which finally drives the Mill. A separate Motor is required to drive the Blower. |
| |
| TRANSMISSION |
Primary speed reduction through V-belt and pulley and secondary through Bevel Gear Set. |
| |
| APPLICATIONS |
| Grinding of following minerals: |
| Barytes |
Bentonite |
Bauxite |
| Calcite |
Coke |
Dolomite |
| Lime Stone |
Red Oxide |
Manganese Oxide |
|
| |
| SALIENT FEATURES |
- LAXMI ROLLER MILL is designed in such a special way ensuring easy repair and maintenance. Easy access helps quick replacement of worn out parts.
- The Wear & Tear Cost per ton is Low.
- A distance plate is provided between Gear box and Base Plate to prevent Dust Entry into the Gear Box. A fan is fitted on the Centre shaft which throws away the particles coming out of the Centre Plate of the Base Plate. Thus a 100% Dust free system which ensures long life of the Bevel Gear & Pinion.
- Roller Arm Assembly incorporates a perfect neoprene Rubber seal to prevent the possible entry of the fine powder, which reduces wear a tear.
- The Worn-out parts can conveniently be replaced through an easily accessible service door.
- Even a Semi Skilled person can operate the Mill.
|
| |
 |
| |
| SPECIFICATIONS |
|
| DRIVE |
| For Mill |
- |
40 HP/960 RPM/TEFC/Sq. Cage Motor |
| For Blower |
- |
30 HP/1440 RPM/TEFC/Sq. Cage Motor |
| For Classifier |
- |
15 HP/1440 RPM/TEFC/Sq. Cage Motor |
|
| CAPACITY |
S.
No. |
Mineral
Dolomite |
Mesh Size |
Three Roller Mill
Production in Kg. per Hour |
| 01. |
|
200-1% RETENTION |
2200 Kgs./Hr. |
| 02. |
|
250-1% RETENTION |
1800 Kgs./Hr. |
| 03. |
|
300-1% RETENTION |
1300 Kgs./Hr. |
| 04. |
|
400-1% RETENTION |
1100 Kgs./Hr. |
| 05. |
|
500-1% RETENTION |
850 Kgs./Hr. |
The above production figure are tentative basis as it depends upon the hardness and grind ability
behavior of the mineral which can vary +/-10% |
| WEIGHT OF MILL |
10.0 MT Approx. |
| MAXIMUM INTAKE SIZE |
16 MM |
| MINIMUM INTAKE SIZE |
8 MM |
| OPTIMUM MESH SIZE |
Upto 500 MESH |
| SPACE REQUIRED FOR THE PLANT |
| 01. |
Length of the Mill |
7.25 |
Meters |
| 02. |
Width of the MilL |
5.75 |
Meters |
| 03. |
Height of the Mil! |
6.90 |
Meters |
|
|
| |
Copyrights © 2010-11 Laxmi Engineering Works. All Rights Reserved.