The main difference between vertical roller mill and ball mill

CHAENG as a vertical mill machinery successor and developers in the development of vertical mill explore differences vertical roller mill and ball mill.

Vertical grinding mill (vertical mill) is mainly applied to ultra-fine powder processing of medium and low hardness, Mohs hardness of 6 non-explosive brittle materials. Ball mill is the material after being broken, and then smash the key equipment. Vertical mill belongs to "smash the bed," the grinding equipment; different with "single particle crush" the ball mill:

1, ball mill energy utilization is low, there is an alternative vertical mill, roller presses and other equipment trend, but there is a ball mill "spherical particle morphology, help cement raw meal calcination and hydration hardening" unique advantages, most of which is still the choice of clinker grinding mill main reason.

2, due to the reasonable vertical mill grinding method, grinding work materials were fully utilized, and the classification in time to avoid over-grinding material and, therefore, its high grinding efficiency, low power consumption (more than 20% saving ball mill the above).

3, vertical mill allows the air volume through, so large drying capacity; the material in suspension, increasing the contact area with the gas stream of material, good heat exchange, so the high drying efficiency. (When the ball mill relatively wet raw material, since it is limited by a ball mill air flow, so in front of ball mill are normally required to install additional drying apparatus.)

4, vertical mill a footprint of only 50% to 70% of the ball mill, a relatively smaller physical footprint.

5, lower initial costs. Early vertical mill implementation costs, operating costs and maintenance costs of only 70% to 80% of the mill equipment.

6, a large particle size material into the mill, generally up to 3% -5% of the roller diameter, allowing large-scale mill feed size and, therefore, eliminates the need for two medium-sized vertical mill grinding. (Ball mill is limited by its maximum diameter, only into small materials.)

7, easy to adjust product fineness, uniform particle size distribution, chemical composition and stability. (ball Mill produced fine particle size ratio low.)

8, less dust, noise, are environmentally friendly. When no vertical grinding operations between grinding and grinding between the liner and the impact, so the low noise, vertical grinding mill and pipe system is relatively simple, sealing better, mostly for negative pressure operation, and therefore less dust .

9, vertical mill has a shorter conversion time, different feedstocks can be converted in a very short period of time the same mill, to produce the different products manufactured. (Ball mill is the opposite.)

10, wear low. Operation without direct contact between the metal, so less metal consumption. So wear parts, long life, wear metal per unit of product is generally 5 to 10 g / t. (The use of a ball mill collision friction manner, so the high wear.)

11, the process is simple, the equipment installed vertically, while the material for grinding mill, drying and grading, so a small footprint, machine failure rate, save money.

Vertical mill machine suitable for grinding hard and abrasive materials, service life is shorter, more frequent maintenance. And it's expensive wear parts than a ball mill, a ball mill, but they replace, hoist, separator and other equipment compared to the total amount of maintenance, still seems simple maintenance, easy and small workload.