SU316802A1 - MILL FOR GRINDING FIBROUS MATERIALS - Google Patents

Abstract

The invention relates to disk mills for grinding fibrous materials and can be used in the pulp and paper industry. The purpose of the invention is to improve grinding by diluting it after the first stage. The mill for grinding fibrous materials includes a housing 1 with a stator 2 and a rotor 3 mounted therein, forming a first A and a second B grinding zone between themselves. The stator 2 can be made in the form of a central 4 and peripheral 5 ring, respectively connected to additive mechanisms 6 and 7, and the rotor 3 is fixed on the drive shaft 8. According to a design variant, the stator 2 can be made in the form of two disks fixed on the end surfaces of the housing 1. A nozzle for feeding a diluent liquid, for example water, is mounted in the housing 1. In the stator 2 there are channels 12, which connect the nozzle with the grinding zone B. The body 1 has openings 13 and 14, respectively, for the supply of fibrous mass and its removal after processing. 3 ill. (L

Description

00

sg o o

The invention relates to disc mills for grinding fibrous materials and can be used in the pulp and paper industry.

The purpose of the invention is to improve the quality of grinding of fibrous mass by diluting it after the first grinding zone.

Fig. 1 shows a mill with a straight-through movement of the fibrous mass during the grinding process; Fig. 2 shows unit I in Fig. 1, a design solution for the unit for supplying the diluent liquid to the grinding zone; Fig. 3 shows a mill, a design variant.

A mill for grinding fibrous materials includes a housing 1 with a stator 2 and a rotor 3 mounted therein, forming a first A and a second B grinding zone between them. The stator 2 can be made in the form of a central 4 and peripheral 5 ring, respectively connected to the additive mechanisms 6 and 7, and the rotor 3 is fixed on the drive shaft 8. According to a design variant, the stator 2 can be made in the form of two disks 9 and 10 fixed on the end surfaces of the housing 1, wherein the first A and second B grinding zones are formed respectively by the stator disk 9 and the rotor 3 and the stator disk 10 and the rotor 3. In the housing 1, after the first grinding zone A, a nozzle 11 is mounted for feeding a diluent liquid, for example water. In the stator 2, channels 12 are made, for example, of a screw shape, connecting the nozzle 11 with the grinding zone B. The housing 1 has openings 13 and 14, respectively, for the supply of fibrous mass and its removal after processing.

The mill works as follows:

The original fibrous mass through

hole 13 is fed into grinding zone A between rotor 3 and ring 4 (disk 9) of stator 2. The mass that has passed through grinding zone A is diluted with liquid supplied through nozzle 11 and channels 12. Water can be used as a diluting liquid, into which, if necessary,

chemicals may be added. The mass diluted to a lower concentration is fed into the grinding zone B between the rotor 3 and the peripheral ring 5 (disk 10) of the stator 2. The working gap between the rotor 3 and the stator 2 is changed by axially moving the stator elements 4, 5, 9, 10 using the additive mechanisms 6 and 7.

The invention makes it possible to improve the quality of grinding of fibrous mass.

Claims (2)

1. A mill for grinding fibrous materials, comprising a housing, a rotor and a stator forming at least two grinding zones, characterized in that, in order to improve grinding, the mill body is equipped with a nozzle for feeding water into the mass being ground after the first grinding zone. 2. Mill item 1, characterized in that a channel is made in the stator, communicating with a nozzle for supplying water to the mass being ground. 5 G 01 ./ / T 01 8oda