Mill Roll

The roll mill is the simplest batch mixing equipment. The principal design consists of two horizontal rolls, usually of equal size, arranged side by side and rotating toward each other at different speeds. The ratio of the peripheral speeds of the rolls, known as friction ratio, ranges from 1 to 2 but is usually around 1.2. The higher friction ratio leads to a higher heat generation in the processed material. Friction, speed, and the sizes of the rolls influence the cooling of the material mass and the intensity of its treatment. Depending on the properties of the process material and its desired temperature, the rolls may be internally cooled or heated by using circulating cooling water or a suitable heating medium.

The material is charged between the rolls in the form of lumps, pellets, chunks, or powder. As a result of rotation, adhesion, and friction, the material is entrained into the gap between the rolls, and upon discharge it sticks to one of the rolls, depending on their temperature difference and velocities. Another factor is the gap between the rolls. In batch mixing the material after loading passes through the gap between the rolls several times, and the mixing action is due to the different speeds of the rolls. Both the shearing action and entrainment of the material into the gap are very important in the mixing process and transporting of the material through the unit. The gap between the rolls can be adjusted by a massive screw mechanism.

With mill rolls for sheets as the main products, we are capable of making forged steel rolls for hot rolling and cold rolling. In addition, we supply a full range of steel types for various rolling processes. Our manufacturing facilities make full use of unique know-how in a system that meets users' needs with close cooperation between our research and development, manufacturing, technical services, and sales units.

The rolls we provide have the following advantages:
  • Higher work efficiency
    When wear resistance can be markedly improved, users can also benefit from a dramatically improved roll consumption rate. It can also significantly extend intervals between roll replacements.
  • Higher product yield
    Excellent wear resistance at high temperatures stabilizes the roll profile, which contributes to improvement of product yield and product surface quality.
  • Attractive product surface
    Because surface roughening from repeated thermal fatigue is controlled, you can make attractive products rolled by rolls with uniform microstructures.
  • Equipment-friendly rolls
    Utilizing our proprietary combining and jointing techniques which are advanced and diverse, we can design and manufacture rolls that are ideal for your service conditions and impose minimal stress on the equipment.

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