SU1443964A1 - Apparatus for preparing analytical samples - Google Patents

Abstract

The invention relates to a device for the preparation of analytical samples by grinding them. The purpose of the invention is to increase the representativeness of the prepared samples and the use of the company. The device contains a pre-grinding chamber 5 formed by a fixed disk I1 fixed on a hinged lid 10 and a rotary disk 13. A folding hinge 10 is provided with a loading channel 15 that communicates through the opening in it the open end of the feed 2 with the loading window I2 of disk 1 one . 1 il. i (L

Description

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The invention relates to the means of controlling the quality of minerals, the preparation of analytical laboratories from the laboratory and can be used, for example, in the coal and metallurgical industries to determine the quality of anthracite, brown, stone, shale coals and the enrichment of them.

The purpose of the invention is to increase the representativeness of the prepared samples and ease of operation.

The disk is mounted on a folding cover, equipped with a loading channel, the input of which is made with the possibility of a quick disconnect connection with the open end of the feeder, and the output is combined with the loading window of the disk. In addition, the feeder auger is quick-coupled to the drive shaft. The proposed design of the pre-grinding chamber provides free access to it for cleaning and routine inspections, which increases the representativeness of the samples being prepared and facilitates the maintenance of the device. This is also facilitated by the proposed split screw design.

The drawing shows the device, a vertical section.

The device contains a hopper 1, a screw feeder 2 with a screw 3, a mill 4 with a pre-grinding chamber 5, filters 6 and a collection of 7 samples. Screw 3 with one end, the inner surface of which has the shape of a multi-faceted hole, interacts with the drive shaft 8 (not shown) the end of which is made in the shape of a polyhedron, and the other end rests on a hinge 9 by a hinged roof 10.

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The angle ot is chosen in the range of 5-1 and depends on the size of the maximum grain of the laboratory sample. A laboratory sample intended for the preparation of analytical samples and obtained as a result of processing a primary sample has a particle size of 0–3 (0–10) mm. An angle of 5-15 ° is optimal for most comminuted materials. At an angle greater than

15 and less than 5 decreases the efficiency of grinding of the material. The adjustment of the angle of capture of the material is carried out, for example, by replacing the fixed disk 1I with a different taper.

The fixed disk 1I is fixed on the folding cover 10, on which the loading channel 5 is formed by means of the overlay hermetically sealed along the longitudinal edges of the groove 5 The output of the latter is aligned with the loading window 12. The input of the loading channel I5 is in working condition (with such a folding cover 10) with the output of the screw feeder 2 open it with the end.

The device works as follows.

The laboratory sample from the hopper} screw feeder 2 through the loading channel 15, which communicates with the loading window 12, is fed into the pre-grinding chamber 5 formed by discs P and 13. After pre-grinding, the material enters into the zone of rubbing

16 mills 4 where it is ground to the desired particle size (0-0.2 mm). The grinded material passes through the slots of the grate 17 to patra-side 8, which connects the mill with the collection of 7 samples. The elastic filters 6 are used to remove air from sample collection 7.

Upon completion of the preparation of the analytical sample, as well as during the conduction, a cone-shaped inactivity inspection is formed by a movable disk P with a loading window 12 and a rotor disk 13 fixed on the drive shaft 14 (not shown) .. The disks 11 and 13 are installed coaxially and form the base is an annular discharge slit, and their side surfaces, made with longitudinal protrusions 1-2 mm high, form the gripper of the grip of the material СС55

ka 10 is folded down; In this case, the disk I1 is retracted to the side, and the input of the loading channel i 5 is separated from the open end of the screw feeder 2, thus allowing free access to the cavities of the hammer mill, pre-grinding chamber 5 and screw auger 2.

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The angle ot is selected in the range of 5-15 and depends on the size of the maximum grain of the laboratory sample. The laboratory sample intended for the preparation of analytical samples and obtained as a result of processing the primary sample has a particle size of 0–3 (0–10) mm. An angle of 5-15 ° is optimal for most comminuted materials. At an angle greater than

15 and less than 5 decreases the efficiency of grinding of the material. The adjustment of the angle of capture of the material is carried out, for example, by replacing the fixed disk 1I with a different taper.

The fixed disk 1I is fixed on the folding cover 10, on which the loading channel 5 is formed by means of the overlay hermetically sealed along the longitudinal edges of the groove. The output of the latter is aligned with the loading window 12. The input of the loading channel I5 is in working condition (with such a folding cover 10) connected to the output of the screw feeder 2 - open it with the end.

The device works as follows.

A laboratory sample from the hopper} screw feeder 2 through the loading channel 15, which communicates with the loading window 12, is fed into the pre-grinding chamber 5 formed by discs P and 13. After pre-grinding, the material enters the zone of erasers

16 mills 4 where it is ground to the desired particle size (0-0.2 mm). Grinding material through the grates of the grate 17 enters the pipe 8, which connects the mill with a collection of 7 samples. The elastic filters 6 are used to remove air from sample collection 7.

Upon completion of the preparation of the analytical sample, as well as during preventive examinations

ka 10 is folded down; In this case, the disk I1 is retracted to the side, and the input of the loading channel i 5 is separated from the open end of the screw feeder 2, which ensures free access to the cavity of the hammer mill, the pre-grinding chamber 5 and the screw feeder 2.

Compared with the prototype, the proposed device has a number of properties that allow to increase the representativeness of the prepared samples, facilitate maintenance, as it provides free access for preventive examinations, removal of the crushed sample residues and cleaning of the mill cavities, which reduces the likelihood of contamination of prepared samples and thus makes them very representative.

The proposed split screw design provides for its easy removal from the feeder cavity, cleaning of the auger and the feeder cavity, which also contributes to increasing the representativeness of the prepared samples.

The use of the proposed device allows to solve the problem of mechanized preparation of analytical samples for analysis on the enrichment

body factories, mines, centralized loading points and cuts.

Claims (1)

Invention Formula A device for preparing analytical and cum samples containing a hopper, a feeder, a mill with a horizontal shaft of a disk rotor, carrying grinding elements, and a pre-grinding chamber formed by a disk rotor and a fixed disk, filled with a loading window and fixed on the hole of the mill housing, filters and sample collection, characterized in that, in order to increase the representativeness of the samples being prepared and the convenience of operation, the hole with a hole is made flip and in it is formed Extra live opening adjacent the outlet end of the feeder, the apertures krshgki communicated between a loading channel.