RU2288036C1 - Roll-type grinder - Google Patents

Abstract

FIELD: friable material grinding equipment.

SUBSTANCE: roll-type grinder has casing with basic material feeding hopper, rolls placed within casing for rotation in opposite directions and equipped with bandages having cutting members, which are positioned so that cutting members of each roll are disposed between cutting members of other roll to define ground material passage gap. Width of cutting members provided on one roll is greater than width of cutting members provided on other roll to define ground material passage gaps of different width. Rolls are positioned so that distance therebetween may be adjusted.

EFFECT: increased yield of ground product, minimal excessive grinding and provision for retaining integrity of valuable components of ground product.

4 cl, 2 dwg

Description

The invention relates to equipment for crushing materials and can be used for crushing fragile materials in various industries, in particular in mining and construction.

Known roll crusher, comprising a housing with a hopper for feeding the source material, placed in the housing rotatably towards each other rolls with teeth mounted so that the teeth of each roll are located between the teeth of another roll [1].

The disadvantage of this crusher is that when crushing brittle materials, it crushes the material.

Closest to the proposed one is a roll crusher, comprising a housing with a hopper for supplying the source material, rolls having rotational motion towards each other, having bandages with cutting elements installed so that the cutting elements of each roll are located between the cutting elements of the other roll to form clearance for the passage of crushed material [2].

The disadvantage of the closest analogue adopted for the prototype is that when crushing brittle materials, it crushes the material and violates the integrity of the valuable components contained within the crushed waste rock.

The objective of the invention is to increase the yield of crushed product with a minimum of regrinding and maintaining the integrity of valuable components.

The technical result achieved by the invention is to improve the quality of crushing of brittle materials, the almost complete absence of over-crushed material.

The technical result is achieved in that in a roll crusher comprising a housing with a hopper for supplying raw material, rolls are installed in the housing rotatably to meet each other, having bandages with cutting elements installed so that the cutting elements of each roll are located between the cutting elements of another roll with the formation of a gap for the passage of crushed material, according to the invention, the width of the cutting elements of one roll is greater than the width of the cutting elements of another roll for the formation of different the width of the gaps for the passage of crushed material, while the rolls are installed with the possibility of changing the distance between them.

The vertices of the cutting elements and the corresponding troughs between the cutting elements can have the same rounded shape.

Each roll can have a separate drive.

The axis of one of the rolls can be fixed motionless, and the second roll can be shifted in the horizontal direction.

Making the width of the cutting elements of one roll larger than the width of the cutting elements of the other roll to form gaps of different widths for the passage of crushed material allows the material to be redistributed by size into various gaps during crushing (crushing chambers). In this case, larger particles fall into large chambers, and smaller ones into smaller ones, which ensures the destruction of ore pieces with a high degree of selectivity.

The installation of rolls with the ability to change the distance between them allows you to adjust the crushing process depending on the source material, changing the gap between the rolls, which in turn ensures high-quality crushing.

The invention is illustrated by drawings, where in Fig.1 shows a General view of the crusher, Fig.2 is a top view of the rolls.

Roll crusher, includes a housing 1 with a hopper 2 for supplying raw material. Rolls 3 and 4 are installed in the housing with the possibility of rotation towards each other, having shafts 5 with cutting elements 6. The cutting elements 6 of each roll 3 and 4 are located between the cutting elements of another roll with the formation of gaps 7 and 8 for the passage of crushed material. The width of the cutting elements 6 of the roll 4 is greater than the width of the cutting elements of the roll 3 to form gaps of different widths 7 and 8 for the passage of crushed material. The axis of one of the rolls, for example, roll 4, is fixed motionless, and roll 3 can be shifted in the horizontal direction, overcoming the resistance of the hydraulic plunger (not shown in the drawings). The tops of the cutting elements 6 and the corresponding vertices of the trough between the cutting elements have the same rounded shape. Each roll has a separate drive (not shown in the drawings).

The rolls have bearing surfaces 9 and 10. Each roll has a diameter of at least a meter. The minimum clearance between the top of the cutting element and the cavity between the cutting elements is maintained and should be at least 10 mm.

Roll crusher works as follows.

The source material from the hopper 2 enters the space between the rollers 3 and 4. When the rolls rotate, the material is distributed by size. Larger particles fall into the gaps of a larger width, small particles fill the gaps of a smaller width, with the destruction of the material with a high degree of selectivity.

The crusher allows you to increase the yield of crushed product with minimal over-grinding and maintain the integrity of valuable components. All this improves the quality of crushing of brittle materials.

Information sources

1. US Patent No. 4359193, CL B 02 C 4/08, publ. 11/16/1982.

2. USSR author's certificate No. 1338884, cl. B 02 C 4/02, publ. 09/23/1987.

Claims (4)

1. Roller crusher, comprising a housing with a hopper for supplying the source material, housed in the housing rotatably towards each other rolls having bandages with cutting elements mounted so that the cutting elements of each roll are located between the cutting elements of another roll with the formation of a gap for passage crushed material, characterized in that the width of the cutting elements of one roll is greater than the width of the cutting elements of another roll for the formation of gaps of different widths for the passage of crushed material la, while the rolls are installed with the possibility of changing the distance between them. 2. The crusher according to claim 1, characterized in that the tops of the cutting elements and the corresponding troughs between the cutting elements have the same rounded shape. 3. Crusher according to claim 1 or 2, characterized in that each roll has a separate drive. 4. The crusher according to claim 1 or 2, characterized in that the axis of one of the rolls is fixed motionless, and the second roll can be shifted in the horizontal direction.

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