SU1442584A1 - Fibrous material cone mill - Google Patents

Abstract

The invention relates to devices for grinding fibrous materials and can be used in the pulp and paper industry for grinding pulp and products based on it. The purpose of the invention is to increase the working life of the mill while ensuring high quality grinding. The mill consists of a housing 1, coaxially mounted with a stator 2 and rotor 3, with working knives and grooves between them of constant depth on working surfaces 4 and 5. In the stator 2, the external surface of which is cylindrical in shape, radial through channels are cut along its forming section with a constant circumferential pitch. At the same time, on the outer surface of the stator, they are movably mounted along one axis to the other plate 0, the protrusions of which are located in the corresponding channels S 9 and form stator blades. For loading and unloading of material, the mill is equipped with inlet 12 and outlet 13 nozzles. 3 il.

Description

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CPg / g The invention relates to a device for grinding fibrous materials and can be used in the pulp and paper industry for grinding pulp and products based on it.

The purpose of the invention is to increase the working life of the mill while ensuring high quality grinding.

Pa figs. 1 shows a conical mill for grinding fibrous materials, a longitudinal section; ka .fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one.

A conical mill for grinding fibrous materials consists of a housing 1 coaxially mounted in a non-stator 2 and a rotor 3, on the working surfaces 4 and 5 of which a knife is made of 6 n grooves 7 between HHI-M of constant depth. In the stator 2, the outer surface 8 of the second is filled with a gap between the stator headset. 2 and the rotor 3 is increased, impairing the quality of the grinding. To reduce the gap, the axial movement of the rotor 3 relative to the stator 2 is performed. After the amount of movement exceeds the thickness of the plate 10, the headset of the stator 2 is replaced

by removing the plate 10 having the largest diameter along the protrusions 11, the remaining plates 10 are displaced along the cylindrical outer surface 8 of the stator 2 by the thickness of the removed plate 10 towards the increased diameter of the rotor 3. In the area of the stator 2, located in the region of the smallest diameter of the rotor 3, New plate 10 with protrusion 11.

The mill is collected, adjusted and the product is milled to j sHoca of the headset, then the restoration of the headset is repeated.

Thus, for the city of

lindrical shape, forming 25 flutes along the axis of the mill along its outer

The radial through channels 9 are cut with a constant pitch circumference, with the outer surface 8 of the stator 2 being intersected with the possibility of intersecting; e sh are fixed closely one to another plate 10, the protrusions 11 of which are located in accordance with each other. 9 m radial channels are formed by knives 6 of stator 2. Dtshruek .; and unloading of the processed mother, the mill is equipped with an inlet 12 and an outlet 13 of the bladder.

The conical mill works in the following way.

The raw fibrous material in the form of an aqueous suspension with a concentration of 2–8% is fed through pipe 12 to the working cavity of the mill, where it is picked up by the rotor 3 and moves along the mill, alternately moving from the rotor 3 to the stator 2 and back, each falling once in the grinding zone, and out of the mill through the pipe 13.

The rotor 3 of the mill is made of a material having greater wear resistance than the plates 10 with the protrusions 11 of the stator 2, therefore, as the mill operates, the wear of the headset is mainly due to the wear of the projections of the plates 10 of the stator 2.

During operation of the mill, uniform wear occurs predominantly of the stator 2 plates 10. When

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the stator surfaces of the plates with protrusions and their replacement as they wear out are provided by a more complete use of the stator working set / s, which increases the working life of the mill. In addition, in the proposed mill there is practically no effect of decreasing d .: the grooves between the stator blades as the headset wears out, which ensures the stability of the quality of the processed product. F. formula

A conical mill for grinding fibrous materials, mainly nitrocellulose, comprising a housing, a stator and a rotor coaxially mounted therein, on the working surfaces of which knives and grooves between them are held at a constant depth, characterized in that high quality grinding, the outer surface of the stator is made of a cylindrical shape, along the radial channels are cut with a constant pitch along the circumferential pitch, while on the outer surface and a stator with the possibility of moving along the axis of the mill are fixed closely one to another plate, the protrusions of which are located in the corresponding through channels, and form stator blades.

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Claims (1)

A conical mill for grinding fibrous materials, mainly nitrocellulose, containing a housing, a stator and a rotor coaxially mounted in it, on the working surfaces of which are made knives and grooves between them of constant depth, characterized in that, in order to increase the working life while ensuring high quality grinding , the outer surface of the stator is made of a cylindrical shape, radial channels are cut along the stator generatrix with a constant step along the circumference, while on the outer surface with tator with the ability to move along the axis of the mill are fixed close to one another plate, the protrusions of which are located in the respective through radial channels and form the stator knives.