Millstone for fiberizer

Abstract

The invention discloses a disc of the attrition mill. The disc includes transmission disc equipped on the main shaft of the attrition mill, fixed disc cooperated to the transmission disc and quipped on the carass of the attrition mill. Concentric circle shied dam is equipped on the tooth surface of the transmission disc and the fixed disc. Each couple concentric circle shield dam are formed to a interval. Each disc has three or more than three concentric circle interval. The width of the interval is diminished gradually with the increasing of the radius. The tooth depth of the mill teeth is also diminished gradually with the increasing of the radius. The first ring mill teeth working surface which is closed to the center of the circle on the transmission disc and the disc plane are formed to tilting acute angle. The invention is simple structure, can decrease the energy consumption, and improve the jordaning quality and output.

Description

technical field [0001] The invention mainly relates to the field of refiners, in particular to a grinding disc for a refiner. Background technique [0002] In the prior art, the refining equipment is mainly a refiner (including cylindrical and conical) and a disc refiner (double disc and single disc), and the latter is more widely used. Disc refiners are divided into high-concentration and low-concentration according to the concentration of the pulp to be ground. It is generally considered that the pulp concentration is below 5% as low-concentration and above 5% as high-concentration. When the concentration is high, it is difficult for the slurry to enter the narrow gap between the teeth of the grinding disc, forming the so-called "bridging" phenomenon, especially for those thicker slurry, this phenomenon is more serious. In the prior art, in order to solve the problem that the coarser slurry is not easy to enter the tooth gap, a "crushing area" is created at the slurry inl...

AI Technical Summary

Problems solved by technology

In addition, most of the pulp that has not been completely ground is pulp lumps and pulp lumps, which has caused many tooth surfaces to fail to be sized

From this, it can be imagined that the larger the radius of the grinding disc, the more serious the phenomenon of no slurry on the tooth surface, but in order to improve the beating degree of the slurry, the operator only needs to increase the pressure between the two grinding discs, so that it is easy to make a small amount of slurry hang The pressure of the grinding teeth increases, causing the fibers to be cut off, and a large number of long fibers become short fibers, which reduces the tensile strength of the paper, and due to the uneven slurry coating on the entire tooth surface, many tooth surfaces are not coated with slurry , These tooth surfaces without slurry cause direct friction between the metal surfaces, the noise is deafening, and the slurry temperature at the mill outlet is very high, so a large amount of energy is converted into heat energy and sound energy, resulting in serious power consumption

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