What Is a Roller Mill?

Roller mill ^[1] is a widely used drying and grinding equipment, which can be widely used to grind cement raw materials or cement clinker and other industrial materials such as construction, chemical and ceramics. The material is crushed under pressure between two rolling rolling surfaces or between the rolling grinding body (ball, roller) and a track (plane, ball, disk); mainly by the grinding rail, grinding body, force It consists of a generating and transmitting mechanism, air flow, and a device that facilitates easy replacement. Roller mills have gained more and more attention from the world's cement industry and domestic and foreign countries due to their unique advantages and characteristics in terms of working principle, grinding mechanism, mechanical structure, and system process performance. With the birth of decomposition technology outside the kiln, More and more roller mills are used to grind cement raw materials and clinker.

Roller mill is a widely used drying and grinding equipment, which can be widely used for grinding cement raw materials or cement clinker and other industrial materials such as construction, chemical industry and ceramics.

Roller mills have gained more and more attention from the world's cement industry and domestic and foreign countries due to their unique advantages and characteristics in terms of working principle, grinding mechanism, mechanical structure, and system process performance. With the birth of decomposition technology outside the kiln, More and more roller mills are used to grind cement raw materials and clinker.

Compared with traditional ball mills, roller mills have the following characteristics ^[2]

Roller mill is a machine that uses the low-pressure material bed grinding principle to grind materials. No matter how its structure changes, its basic working principle is the same. Now take the modern Loesche mill as an example ^[3]

It can be known from the definition of the roller mill that the core part of the roller mill is the different shapes of the mill and the disc and the mutual matching between them. The difference between different roller mills lies in this.

Also known as Loesche, domestically produced as TRM type ^[4]

It is a form of Raymond Mill. It mainly consists of a rotating grinding bowl and grinding roller with a 150 tilt. The grinding roller applies pressure to the grinding bowl through a spring, and the linear velocity of the edge of the grinding bowl is 5.3 to 6.5 m / s ^[3]

Called MPS mill with three tire-shaped drum rollers ^[5]

Called the Polysius mill. Also known as HRM, PRM roll mill ^[6]

The main economic and technical indicators of roller mills are output, power consumption, qualified rate of chemical composition, product fineness, moisture, etc. ^[5]

1. Energy saving: The high-pressure pair-roller superfine crushing process replaces the traditional crushing-grinding process, reducing the overall power consumption by more than 60% and the steel consumption by more than 40%.

2. Large output: The crushing ratio is large. It can crush 40 ~ 120mm materials to less than -3mm. The single machine processing capacity can meet the output of 20 t / h to 1000t / h.

3. Save investment: The roller surface has high hardness, strong wear resistance, and uses hard alloy steel materials. The service life is up to 20,000 hours. The equipment covers a small area and the construction investment is low.

4, environmental protection is simple: the equipment is running with low noise, less dust pollution, rollers run smoothly, the operating rate is as high as 95% or more, online maintenance, easy operation.

5. Wide range of applications: Flexible process system configuration and strong material processing adaptability are conducive to large-scale, automated and energy-efficient development of beneficiation and processing.