RU2514054C1 - Dry rub-off machine - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed machine comprises cylindrical housing, initial material feed pipe, material discharge pipe and rotor drive. Initial material distributor composed of fixed cone is arranged directly above the rotor. Circular flanges are arranged at housing sidewall while fine dusty fraction discharge pipe is arranged at housing top section. Rotor fitted on the shaft in said housing is shaped to cylinder in height equal to rub-off zone and equipped with radial blades. It includes industrial blower is communicated with pipe discharging the fine dusty fraction along with airflow. Initial material feed pipe is arranged directly above initial material distributor. Finished product discharge pipe is arranged at housing bottom section.

EFFECT: higher efficiency of rubbing-off and separation.

1 dwg

Description

The invention relates to the field of engineering, and in particular to devices for dry cleaning and mineral processing - grinding machines - and can find application for the enrichment of various bulk materials, for example, for the enrichment of glass sands.

A known machine for wet scrubbing, comprising two rectangular chambers in cross section separated by a partition with a window in the lower part, spindles located in chambers and consisting of an upper hollow shaft and an all-metal shaft located inside the hollow shaft, and impellers mounted on both shafts, means for feeding pulp located in the upper part of the first chamber, means for withdrawing pulp located in the upper part of the second chamber, and drives that rotate the shafts together with the impellers in the opposite direction relying parties (Aut. St. USSR No. 411903, B03B 3/36, published January 25, 1974).

However, the known scouring machine is characterized by low efficiency scouring material and the complexity of the design. Low efficiency is due to the rectangular shape of the chambers and the presence of spurious voids in these chambers. In addition, the machine does not provide high efficiency of scrubbing the surface of particles from oxide films due to the fact that the liquid phase levels more than a third of the weight of the particles, and the interlayer of liquid between the particles prevents their mutual interaction. And the complexity of the design is due to the fact that due to the presence of two shafts rotating in opposite directions, the machine contains complex gearboxes. In addition, wet scrubbing does not allow to separate the source material into two fractions: the finished product and the clay component, in connection with which, at the output of the known machine, it is necessary to install additional equipment for separating the material.

A known wet scrubbing machine comprising a cylindrical conical body, a working body in the form of a rotor with centrifugal blades, located on a shaft in the lower part of the housing for mixing the material, a pipe for supplying the source material located directly above the rotor, ribs for imparting turbulence to the material, radially located in conical part of the housing, a pipe for outputting the processed material located in the upper part of the housing, and a rotor drive located above the upper part of the housing, while the lower part of the body is filled with granules made of solid material (RF Patent for utility model No. 73226, B03B 5/02, published May 20, 2008).

However, this washing machine is characterized by high abrasive wear of the working body. The machine does not provide high efficiency of scrubbing the surface of particles from oxide films due to the fact that the liquid phase levels more than a third of the weight of the particles, and the layer of liquid between the particles prevents their mutual interaction. In addition, wet scrubbing does not allow to divide the source material into two fractions: the finished product and the clay component, in connection with which, at the output of the known machine, additional equipment must be installed to separate the material into fractions.

The objective of the invention is to significantly reduce the abrasive wear of the working body due to the exclusion of the interaction of the working body with the processed material, to increase the efficiency of scouring the material and to separate the material into a fraction of the finished product and into a fine dust fraction directly in the scouring machine due to the dry grinding process .

The essence of the invention lies in the fact that to solve the problem by the specified technical result, the dry scrubbing machine comprising a cylindrical body, a rotor with blades located on a shaft in the body, a pipe for supplying raw material, a pipe for outputting material, and a rotor drive, is different the fact that the rotor is made in the form of a cylinder with a height equal to the rubbing area, and is equipped with radial blades, it contains a source material distributor made in the form of a fixed cone and located directly above the rotor, annular shelves located on the side wall of the housing, a nozzle for outputting a fine dust fraction together with an air stream located in the upper part of the housing, an industrial fan technologically connected with a nozzle for outputting a fine dust fraction together with an air stream, a supply pipe the source material is located directly above the distributor of the source material, a pipe for outputting the final product is located in the lower part of the housing.

The invention is illustrated by the drawing - General view of the machine, a vertical radial section.

The dry scrubbing machine comprises a cylindrical body 1, a pipe 2 for supplying the starting material located in the upper part of the housing 1, ring shelves 3 placed on the side wall of the housing 1, a pipe 4 for outputting the finished product located in the lower part of the housing 1, pipe 5 for the output of the fine dust fraction together with the air flow located in the upper part of the housing, the rotor with radial blades 6, located in the housing 1 on the vertical shaft 7, the distributor 8 of the source material located under the pipe 2 for supply and the source material and directly above the rotor and made in the form of a fixed cone, rigidly mounted on the housing 1, a drive (not shown) of the working body and an industrial fan (not shown), technologically connected with the pipe 5 for outputting a fine dust fraction together with air flow.

The invention is used as follows.

At the outlet of the nozzle 5, in order to output the fine dust-like fraction together with the air flow, a vacuum is created by means of an industrial fan that ensures the air flow in the machine with the required design speed from the bottom up. The rotor through the drive give rotation with the required technological speed. Then, through the pipe 2, the source material is fed to the distributor 8, which ensures the distribution of the source material around the circumference along the side wall of the housing 1. Under the influence of gravitational force, the material moves downward, pouring along the annular shelves 3. Under the influence of the air flow created by the blades 5 of the rotating rotor, particles material acquire the horizontal component of the speed of movement. Moving along the side wall of the housing 1, the particles of the material acquire different speeds due to the inhibitory effect of the walls of the housing 1 and the swirling air flow. On the annular shelves 3, the material is intensively mixed, which ensures intensive grinding of the source material in full. In this case, the surface of the particles of the starting material is cleaned of harmful components (clay component and oxide films), which are small dusty particles. In addition, the shelves 3 contribute to the removal of particles of material from the side wall of the housing 1 and their entry into the vertical upward air flow. Thus, the starting material is divided into small dust particles and large purified particles of the finished product.

Small dusty particles are picked up by a vertical ascending air stream and through the pipe 5 are removed from the machine. Further, using standard equipment (cyclones and / or filters), the air flow is cleaned of dust.

The cleaned large particles under the influence of gravitational force move down the machine and pour over shelves 3, which helps to increase the residence time of the material in the scouring zone. Vertical upward air flow reduces the speed of movement of large particles, which also contributes to an increase in the time spent in the scrub zone and a more complete cleaning of the material. Through the pipe 4, large particles of the finished fraction are removed from the machine.

The annular shelves 3 also contribute to the protection of the side wall of the housing 1 from abrasion due to the formation of a fixed layer of material on them.

The size limit of the fine particles carried out by the air can be changed over a wide range by controlling the speed of the air flow in the scrub zone.

The blades 6 of the rotor during operation do not interact with the material and are not subject to abrasive wear, which significantly increases the service life of the rotor compared to the prototype.

Thus, the invention allows for dry scrubbing of the starting material, for example, quartz sand, and separately removing from the machine a fine pulverulent fraction and a coarse fraction of the finished product.

Claims (1)

A dry scrubbing machine comprising a cylindrical body, a rotor with blades located on a shaft in the body, a pipe for supplying raw material, a pipe for withdrawing material, and a rotor drive, characterized in that the rotor is made in the form of a cylinder with a height equal to the rubbing area, and equipped with radial blades, contains a distributor of source material made in the form of a fixed cone and located directly above the rotor, annular shelves located on the side wall of the housing, a pipe for outputting a fine dust-like fra together with the air flow located in the upper part of the housing, an industrial fan technologically connected with a pipe for outputting a fine dust fraction together with the air stream, a pipe for supplying the source material is located directly above the source material distributor, a pipe for outputting the final product is located in the lower part corps.

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