RU2385762C2 - Aggregate for production of granulated material with coating - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to production of complex granules of bitumen particles with inertial powder filler and may be used for production of asphalt concrete. Aggregate for production of granulated material with coating comprises driven horizontal drums with cells on outer surface, device for charging of loose material, reservoir for collection of finished product. Outer surface of drums is arranged of elastic material, and in inner volumes of drums there are cams arranged as adjacent to elastic surface. Over drums there are devices installed for supply of powder onto surface of cells, and also there are the following components arranged serially - reservoir-heater of bitumen joined in lower part to pneumatic sprayer, under which there is a cooler of bitumen particles and mixer.

EFFECT: invention makes it possible to produce complex granules of solid particles, and also to apply powder onto surface of granules with formation of strong coating on them.

1 dwg

Description

The present invention is intended for use in the chemical industry, agriculture, the production of building materials and other industries. The use of the aggregate is most relevant for the preparation of complex granules from bitumen particles with an inert powder filler as applied to the production of asphalt concrete.

A known unit for mixing and compaction of bulk materials containing a conveyor belt with a drive, dispensers, an unloading device and mixing devices having elastic elements and provided with a rotary drive, the drive drum of the conveyor belt has on its surface cells and a shell of elastic material, and the dispensers, the unloading device and mixing devices are located in the internal volume of the conveyor belt, and the mixing devices are disks located in a portion of the lower branch of the transport belt and having elastic elements at the end [RF Patent No. 2323140].

The disadvantages of this unit include the complexity of the design and the difficulty of obtaining a coating on the surface of the finished product.

Closest to the proposed invention is a device for compaction of bulk materials containing rotating rolls, a rotary drive, a hopper, an unloading device, elastic bands, tension and breaker rollers [A.S. No. 1368021, 09/22/1987, IPC B01J 2/22]. This device allows to obtain compacted material in the form of granules.

The disadvantages of this device include the difficulty of obtaining complex granules from solid particles that differ by 2 orders of magnitude, as well as the inability to obtain coated granules.

The objective of the invention is the creation of an aggregate for producing granular coated material, which allows to obtain complex granules from solid particles, differing by 2 orders of magnitude, and to coat the obtained granules.

This object is achieved in that in the unit for producing granular coated material containing horizontal driving drums with cells on the outer surface, a bulk material loading device, a container for collecting the finished product, the outer surface of the drums is made of elastic material and adjacent to the inner volumes of the drums to the elastic surface of the cams, and above the drums, devices for supplying powder to the surface of the cells are installed, and a container is also placed in series l-bitumen heater, connected at the bottom with a pneumatic atomizer, under which are located a bitumen particle cooler and a mixer.

The unit for producing granular coated material contains a heater tank 1, a pneumatic atomizer 2, a droplet cooling device 3, a granular material loading device 4, and a mixer of bitumen particles with mineral powder 5. Hollow horizontal drums 10 with cells on the outer surface are placed at the bottom of the unit 11 and rotary motion drives 7. Inside the drums, cams 9 are installed that interact with the surface of the cells. Each drum is equipped with a device for supplying powder to the surface of the cells 6. A container for collecting the finished product 8 is located in the lower part of the unit.

The unit for producing granular coated material works as follows.

From the tank-heater 1, liquid bitumen enters the pneumatic atomizer 2, where, with the help of a swirling stream of air, drops of bitumen 40-60 microns in size are formed. Next, the formed droplets fall into the droplet cooling device 3, for example with cold air, and solidify. The frozen drops of bitumen are sent with particles of mineral powder coming from the device for loading granular material 4 into the mixer 5. Next, the resulting mixture enters the granulation zone. The formation of granules and the coating of mineral powder on their surface occurs in the cells between two horizontal drums 10. To form a coating on the surface of the granules, powder feeding devices are applied to the surface of the cells 6, while the mineral powder is applied in a thin uniform layer on the surface of the cells. A mixture of particles of bitumen with mineral powder is fed into the gap between the drums and compacted in the cells 11 by providing pressure on the surface of the granules, and sufficiently strong granules with a spherical shape are formed. The granules are unloaded from the cells when the cell is deformed by cams 9. Finished granules are unloaded into a container for collecting the finished product 8.

Due to the fact that the surface of the cells is covered with a layer of powder, during the granulation process, this powder adheres to the surface of the granule, forming a durable coating.

The proposed unit is multifunctional and can continuously provide complex granules at a relatively high productivity.

Claims (1)

A device for producing granular coated material, containing horizontal driving drums with cells on the outer surface, a bulk material loading device, a container for collecting the finished product, characterized in that the outer surface of the drums is made of elastic material and adjacent to the elastic surface are placed in the inner volumes of the drums cams, and above the drums, devices for supplying powder to the surface of the cells are installed, and also a bitumen capacity heater is placed in series, Connections at the bottom with pneumatic sprayer at which the particle cooler arranged bitumen and mixer.

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