What is the essential difference between vertical mill and ball mill?

From:未知    Date:2021-03-22 16:17

Vertical mill (mainly suitable for ultrafine powder processing of non-flammable and explosive brittle materials with medium and low hardness, Mohs hardness within 7). Ball mill is the key equipment for crushing materials after they are crushed. Vertical mill is a kind of grinding equipment of "material bed crushing", which is quite different from the ball mill of "single particle crushing".

Features of vertical mill:

1. Low running costs
It adopts the technology that vertical roller grind material directly on the disc, with low energy consumption; for the roller is not contact with the disc directly in the work, and the roller and liner are made by quality materials, it is of less wear and long life.
2. Simple and reliable operation
Its automatic control system can reach remote control, which is easy to operate; there is the device to prevent roller sleeve contact with disc liner directly, and avoid the destructive impact and severe vibration; we can turn the rotating arm by repairing fuel tank, replace the roller and liner are more convenient, which can reduce the downtime.
3. Energy conservation and environmental protection
It features small vibration, low noise, and sealing device as a whole, and the system also works with no pressure and dust spills.

Features of ball mill:

1. Traditional sliding bearings are replaced by double row roller bearings in small and medium size ball mills to reduce energy consuming.
2. Large ball mills adopt pitot pressure or hydrostatic bearings.
3. Air clutch system for starting the motor safely.
4. Low speed driving unit with Lifting device, convenient for maintenance.
5. New Endurable wearing parts to increase service life of vulnerable parts.

What is the difference between vertical mill and ball mill?

1. The energy consumption rate of the ball mill is low, and there is a tendency to be replaced by vertical mills, roller presses and other equipment. However, the ball mill has "the shape of the particles is approximately spherical, which is beneficial to the calcination of raw materials and the hydration and hardening of cement." The unique advantages, and the ceramic lining inside the ball mill, may be a choice for some users who do not contain iron or require excessive iron content.
2. Due to the reasonable method of the vertical mill, the grinding work is fully utilized by the material, and the classification is timely, which avoids the phenomenon of material over-grinding, so its grinding efficiency is high, and the power consumption is lower (30% electricity saving than ball mills) the above).
3. The vertical mill allows a large amount of air to pass through, so the drying capacity is large; the material in the mill is in a suspended state, which increases the contact area between the material and the air flow, and the heat exchange conditions are good, so the drying efficiency is high. (When the ball mill grinds wet raw materials, because of the limited air flow through the ball mill, additional drying equipment is usually installed in front of the ball mill.)
4. The vertical mill occupies only 50% to 70% of the space of the ball mill, and the physical space occupied is relatively smaller.
5. Lower initial cost. The initial construction cost, operating cost and maintenance cost of the vertical mill are only 70% to 80% of the ball mill equipment.
6. The granularity of the material entering the mill is large, generally up to 3%-5% of the diameter of the grinding roller. Large mills allow a large granularity of the feed material. Therefore, the large and medium-sized vertical mill can save the secondary pulverization. (The ball mill is limited by its larger steel ball diameter and can only feed smaller raw materials.)
7. The fineness of the product is easy to adjust, the particle size is uniform, and the chemical composition is stable. (The proportion of fine powder in the product produced by the ball mill is relatively low.)
8. Low dust and low noise are good for environmental protection. There is no collision between the grinding bodies and between the grinding body and the liner during the vertical mill operation, so the noise is low. The grinding and piping system of the vertical mill are relatively simple, with better sealing, and mostly negative pressure operation, so there is less dust .
9. The vertical mill has a short conversion time, which can convert different raw materials on the same mill in a very short time to produce different products. (The ball mill is the opposite.)
10. The ball abrasion is low. There is no direct contact between metals in the ceramics operation in Neimura, so the metal consumption is small. Therefore, the parts wear less and have a long life. The metal abrasion per unit product is generally 5-10 g/ton. (And the ball mill uses the collision friction method, so the abrasion is high.) Its cost is also relatively high.
11. The process flow of the vertical mill is simple, and the equipment is installed vertically. The mill grinds, drys and classifies the materials at the same time, so it occupies a small area, has a low probability of failure, and saves money.
Vertical mills and ball mills have their own advantages. In general, vertical mills have a larger advantage. Vertical mills have large output, small footprint, energy saving and environmental protection, convenient maintenance, and a higher rate of return to customers. This is also the reason why most customers choose vertical mills.
The mill manufacturer Clirik focuses on customers, makes good use of product quality and perfect after-sales service, and continues to provide good mills for milling companies. The machine-made powder production line solution, quality makes the future, you are welcome to contact us.

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