SU1222310A1 - Installation for dry concentration of fillers for concrete mixes - Google Patents

Description

2. Installation under item 1, characterized in that the maker is made in the form of a drum dryer, the body of the drum classifier from the side of its receiving part is solid, and from the side of the unloading part by means of ring partitions mounted classed1222310

picker sieves, while the classifier is equipped with a heater and a high pressure fan, the outlet nozzle of which is located at the end of the classifier's body on the side of its discharge part, and the receiving part of the classifier's body is connected to the dusty chamber by means of a vibrating feeder.

The invention relates to installations for the dry beneficiation of materials, mainly sand, gravel, etc., which can be used in the production of durable, high strength and extra strong concrete used in construction.

The purpose of the invention is to improve product quality and plant performance, t

The drawing shows schematically the installation of dry enrichment of aggregates for concrete mixes, general view

The dry enrichment unit contains accumulative bunker 1. In the upper part of the unit to the accumulative bunker, a dehydrator-drum dryer 2 is installed for rotation, under which is placed a screen 3 fixed on the pneumatic charger 4 with a heater .. Pneumatic blower 4 with its output nozzle 5 is placed in the expansion pipe 6 with nozzles 7 for supplying air. The bumper plate 8 of the stacked type is installed in a dusty chamber 9, which is connected to the accelerating tube 6. To one end of the dusty chamber 9 a vibrating feeder 10 is attached, the other end of which is mounted on the drum classifier 11. The latter is made in the form of a tube, the receiving part of the body of which is solid, and the discharge part of the pipe is divided into sections by annular partitions 12, between which the sieves 13 are fixed according to the required aggregate fractions, against which storage bins 14 are installed. At the end of the discharge part lassifikatora 11 fixed fan 15 high

pressure. The dust chamber is connected by air duct 16 to the aspiration system 17. A conveyor 18 is located at the bottom of each storage bin 14 in the lower part of the installation. The installation works as follows.

The fillers are fed into the upper hopper 1, from which they enter the rotary drying drum 2, where they are dried at 300-400 ° C with the drum moving at a speed of 20-30 rpm. The temperature heating of the fillers is carried out with the help of heat heaters installed in the drum. From the drum, the aggregates through the connecting hopper 1 are fed to the vibrating screen 3, where they are subjected to rough cleaning. From the vibrating screen, the aggregates are directed to pneumatic pump 4, from which they are moved in the pickup pipe 6 at a speed of 20-30 m / s, and are subjected to collisions and air-dry cleaning. Partially cleaned aggregates then hit each other on the surface of a stack-type fender plate 8 located in the dusty chamber 9. The cleaned aggregates are fed through the vibrating feeder 10 to the receiving part of the drum classifier 11 and are distributed between the annular partitions 12 and the sieve i 3 required

fractions ,. Using a high-pressure fan 15, the filling of aggregates in dry air is accomplished. The removal of fine particles and mold is performed by aspiration.

system 17. Purified and friction aggregates from bunkers

3

They are moved by conveyors 18. The installation is controlled from the control panel 19 by a single operator.

The installation is designed for the performance of aggregates 40-50. If it is necessary to increase productivity, a complex of several parallel-installed dry enrichment plants is created.

Application of the proposed dry enrichment plant for aggregates for concrete and similar mixtures pos04

It will improve the quality of aggregates for concrete and similar mixtures, eliminate the use of water during enrichment, save 10-15% of cement using the obtained aggregates, increase the strength of concrete by 15-20%, expand the boundaries of application (for sand, rubble, gravel-sandy . e.), increase mobility, reduce labor intensity in operation, automate the processes of preparation of concrete mixtures, and improve the conditions of labor and environmental protection.

Claims (2)

1. INSTALLATION OF DRY ENRICHMENT OF FILLERS FOR CONCRETE MIXTURES, containing a receiving accumulating hopper, dehydrator, screen and suction system, characterized in that, in order to improve product quality and productivity, it is additionally equipped with a pneumatic blower associated with a screen and a nozzle having a calorific outlet for heating the air connected to the outlet nozzle of the pneumatic supercharger by an accelerating pipe with nozzles for air supply located along its length installed under the accelerating pipe with a drum class a fixture adjacent to the booster pipe and the drum classifier with a dust chamber placed in the dust chamber with a baffle plate and connected via an air duct to a pneumatic blower and nozzles of the acceleration tube with a high-pressure fan. > 2. Installation according to π. 1, characterized in that the dehydrator is made in the form of a drum dryer, the drum classifier case on the receiving side is solid, and on the discharge side through the partition walls is divided into sections, between which classification screens are mounted, while the classifier is equipped with a heater and valves · A high-pressure torus, the outlet nozzle of which is located at the end of the classifier housing on the side of its discharge part, and the receiving part of the classifier housing is connected to the second chamber via vibratory feeder.