Superfine mill (multi roll mill) is mainly used for superfine powder processing of non flammable and explosive brittle materials with medium and low hardness and Mohs hardness ≤ 6, such as calcite, chalk, limestone, dolomite, carbon black, kaolin, bentonite, talc, mica, magnesite, illite, pyrophyllite, vermiculite, sepiolite, attapulgite, rectorite, diatomite, barite, gypsum, alunite, graphite, fluorite, phosphate rock For more than 100 kinds of materials such as potassium ore and pumice, the particle size of fine powder products can be adjusted arbitrarily between 325-3000 mesh, and the output can reach 0.4-4.5 tons per hour.

Performance characteristics of ultra-fine pulverizer (multi roll mill):

1. High efficiency and energy saving: when the fineness of finished products and motor power are the same, the output is more than twice that of air mill, stirring mill and ball mill.

2. Long service life of vulnerable parts: the grinding roller and ring are forged with special materials, which greatly improves the utilization degree. When the fineness of materials and finished products is the same, the service life of wear parts is 2-5 times longer than that of impact crusher and Turbine Crusher, which can generally reach more than one year. When processing calcium carbonate and calcite, the service life can reach 2-5 years.

3. High safety and reliability: because there are no rolling bearings and screws in the grinding chamber, there is no problem that the bearings and their seals are vulnerable, and there is no problem that the screws are easy to loosen and damage the machine.

4. High product fineness: the fineness of three ring medium speed ultra-fine powder mill can reach D97 ≤ 5 at one time μ m。

5. Environmental protection and cleaning: the pulse dust collector is used to capture dust and the muffler is used to reduce noise, which has the characteristics of environmental protection and cleaning.

Working principle of superfine mill (multi roll mill):

During operation, the main engine motor drives the main shaft and rotary table to rotate through the reducer, and the roller pin at the edge of the rotary table drives dozens of grinding rollers to roll in the grinding ring raceway. After large materials are crushed into small particles by hammer crusher, they are sent to the storage bin by elevator, and then evenly sent to the bulk tray on the upper part of the rotary table through vibrating feeder and inclined feed pipe.

Under the action of centrifugal force, the materials scatter to the periphery of the circle and fall into the raceway of the grinding ring. They are impacted, rolled and ground by the ring roller, and become powder after processing by the three-layer raceway. The high-pressure fan sucks the external air into the machine through suction, and brings the crushed materials into the powder concentrator.

The rotating impeller in the powder concentrator makes the coarse materials fall back and regrind. The fine powder that meets the requirements enters the cyclone powder collector with the air flow and is discharged by the discharge valve at the lower part, which is the finished product, while the air flow with a small amount of fine dust is purified by the pulse dust collector and discharged through the fan and muffler.

Product technical parameters of ultra-fine pulverizer (multi roll mill)