SU1595618A1 - Installation for mechanical recovery of sand - Google Patents

Abstract

The invention relates to foundry, in particular, to technology and equipment for the regeneration of molding sands and sands. The purpose of the invention is to improve the quality of cleaning the surface of the sand. This goal is achieved by supplying the installation, including the disintegrator of lumps of the spent mixture, the classification chamber 3 and the conveyor 4 of the disintegrated mixture, horizontal shafts 8 with working bodies on them, nozzles 18 in the lower part of the loading platform 5 and flap 13, allowing to adjust also the degree of sand cleaning and installation capacity, while the conveyor 4 is made on the site of the chamber 3 in the form of a complex belt conveyor, the upper dumping drum 10 of which is placed in the vestibule 5, and the lower - in the groove 6. Pea ization invention allows to expand the range of mixtures using mechanical reclaimed. 3 il.

Description

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The invention relates to a foundry, namely, equipment, mainly used in the mixing and preparation departments of the line shops for regeneration: separation of the binder film, removal of the clay component and partial depletion of the used molding sand.

C (CI of the invention - improving the quality of cleaning the surface of the sand.

Figure 1 shows the proposed: installation, general view; 2 -; a classification chamber with an integrated conveyor; on fig.Z - the same, top view.

The installation contains mounted on a common basis 1, disintegrator 2 lumps of the spent mixture, the classification chamber 3 and the conveyor 4 of the integrated mixture into the chamber 3.

Chamber 3 contains a loading platform 5, a discharge well (U1ob 6, perforated below 7 and horizontal shafts 8 with working bodies on them.

A belt conveyor 9 of the conveyor 4 is mounted into the chamber 3. The upper drum 10 and the feeding branch 11 of the conveyor 9 are mounted in the window 12 of the loading platform 5. The flap 13 suspended on the hinge 14 overlaps the window 12, the required clearance 15 is set by means of the element 16. The branch 17 of the conveyor 4 passes through the chamber 3 and goes beyond the installation limits by the required amount provided by the calculation or. line layout. On the upper surface of the hearth 7, a transverse row of nozzles 18 is provided, the air to which is supplied through a pipeline 19 from an individual source (high pressure fan or from a compressor). The layout of the installation can be performed with the location of the blade shafts 8 along the belt conveyor 9, or across it, and hence across the installation.

The installation works as follows.

The pre-crushed and millet for the spent molding mixture is cleaned of metal scrap and the feed branch 11 of the belt conveyor 9 is transported through a vestibule 5 to the loading opening while the flap 13 is suspended on

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the hinge 14, the element 16 is retracted from the vertical position to the right, and the gap 15 formed between the flap 13 and the drum 10 is adjusted to the value of the maximum mixture passage (in terms of productivity). The size of the gap depends on the feed rate of the mixture.

The conglomerate coming from the drum 10 is picked up by the fluidized bed and processed in suspension by the working bodies of the shafts 8,

At the left edge, i.e. on the surface of the hearth 7, having mounted a transverse row of nozzles 18 located under the drum 10. Air from the compressor or high-pressure fan enters through conduit 19 and is directed by nozzles 18 to the upper drum, blows off the conglomerate sticking to the belt, and at the same time displaces it to the workers shaft bodies 8, which discard particles and collide them with each other, which (ultimately) helps to clean the grains of quartz sand from the binder film and from the clay component. The sand is transported by the fluidized bed to the discharge opening, where it collapses, the passage opening, and falls on the discharge branch 17 with the drum 20 in the groove 6. The drum 20 supplies sand to the next processing equipment or to special storage bins.

The use of the proposed plant allows (in connection with improving the quality of sand cleaning) to expand the range of mixtures using mechanical regenerate.

Claims (1)

Claims. Installation of mechanical regeneration - FDI of sand, containing, on a common basis, a clod disintegrator, a classification chamber with a perforated hearth, a loading platform and a discharge chute, a fan and an air duct, and a conveyor of the disintegrated mixture into the said classification chamber, which differs from that, in order to improve the quality of cleaning the surface of sand in a fluidized bed, it is equipped with horizontal shafts with working bodies on them located in the classification chamber. least over perforated51595618 It is suspended in the form of two four-hinge branches in the loading vestibule, reel-reel belt conveyor, and a row of nozzles mounted across one of the discharge drums of the classification chamber at the bottom of the loading vestibule, while the conveyor of the disintegrated mixture is in the loading platform in front of the flap, and the other drum is built into the discharge chute g S 10 8 P Fird in the form of a four-drum belt conveyor with two branches, one of the dumping drums of which pogo installed in the loading vestibule in the form of a four-drum belt conveyor with two branches, one of the dumping drums of which in front of the said shield, and the other drum is built into the discharge chute. FIG {