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What is the difference between vertical mill and ball mill?

News Date:2018-07-03 16:43:14

1. The energy consumption rate of the ball mill is relatively low. At present, there is a tendency to be replaced by vertical mills, roller presses, etc., but the ball mill has a “granular shape that is approximately spherical, which is conducive to raw material calcination and cement hydration hardening”. The special advantage is that this is the main reason why clinker mills still use ball mills.

2. Because the vertical grinding mill method is reasonable, the grinding work is fully utilized by the materials, and the grading is timely, avoiding the phenomenon of over-grinding of the materials, so the grinding efficiency is high and the power consumption is low (20% less than the ball mill) the above).

BALL MILL

3. The vertical roller mill allows a large amount of air to be passed, so the drying capacity is large; the material in the grinding is in a suspended state, which increases the contact area between the material and the airflow, and the heat exchange condition is good, so the drying efficiency is high. (When the ball mill grinds the wet material, due to its limited air flow through the ball mill, additional drying equipment is usually required in front of the ball mill.)

4. The space occupied by the vertical mill is only 50%~70% of the ball mill, and the occupied physical space is relatively smaller.

5. Lower initial cost. The initial construction cost, running cost and maintenance cost of the vertical mill are only 70%~80% of the ball mill equipment.

6. The particle size of the grinding material is large, which can reach 3%-5% of the diameter of the grinding roller. The large-scale grinding allows the material to have a large particle size. Therefore, the large and medium-sized vertical grinding can eliminate the secondary crushing. (Ball mills are limited by their larger steel ball diameters and can only be used with smaller raw materials.)

7. The product has fine adjustment of fineness, uniform particle size and stable chemical composition. (The proportion of fine powder in the product produced by the ball mill is low.)

8, low noise, less dust, is conducive to environmental protection. There is no impact between the grinding body and the grinding body and the lining plate during the vertical grinding operation, so the noise is low, the grinding and piping system of the vertical grinding machine is relatively simple, the sealing is good, and the operation is mostly negative pressure operation, so the dust is less. .

9. Short conversion time, vertical mill can convert different raw materials on the same two mills in a very short time to produce different products. (Ball mills require longer cleaning times.)

10. Low wear. There is no direct contact between metals during operation, so metal consumption is small. Therefore, the wear and tear of the accessories is small and the service life is long. The metal wear of the unit products is generally 5-10 g/ton. (The ball mill uses collision friction, so it wears high.)

11. The process is simple, the equipment is installed vertically, and the mill grinds, dries and grades the materials at the same time, so the floor space is small, the probability of failure is low, and the funds are saved.

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