SU50315A1 - Device for cleaning grains of burnt earth from dust - Google Patents

Description

Under the influence of the high temperature of the metal being poured, the clay of the molding earth is melted and in the form of a gas-tight crust surrounds the grains of sand. This circumstance makes it impossible to use burnt soil for the preparation of molding and core sands, which, in addition to the unprofitability of dumping a large amount of burnt land, creates great difficulties during transportation. From here, numerous attempts at regeneration naturally arose, i.e., the restoration of the burned earth by separating the burned clay from the sand grains.

The use of disintegrants and aerators for this purpose did not produce the desired effect, since at low speeds the plant performance was low, and at high speeds, especially on aerators, not only the crust but also the grain of sand was destroyed.

The present invention aims to eliminate the above disadvantages and is based on the dynamic effect of separating the burnt clay from the sand grains while maintaining the integrity of the latter by creating friction between the grains of the burnt earth using two parallel sandwich discs.

The drawing shows schematically the proposed plant for the regeneration of burnt earth.

The ground burned after kneading it into rolls (not indicated in the drawing) and separating metallic impurities in the lvum short sleeves, arrives at the rapidly rotating blades of two heads of the 9 type of isometry.

Heads 9, rotating in different directions, as shown by arrows, with the number 1500-2000 per minute (which should be established more precisely in the course of working design), give the particles of dry earth a very significant speed.

Two continuous streams of earth flying out of both heads intersect at a certain angle (the most effective angle value should be established empirically).

The primary separation of burnt clay occurs, firstly, at the intersection point of the earth jets following the collision of sand grains with each other and, secondly, when the grains hit (not colliding at the intersection point) on removable screens 13 made of white iron.

The force of impact of the grains on the screens is regulated by changing the angle of inclination of the latter. Then, the earth enters the intermediate sleeve partly from the cone 10, partly flows down the walls - through the blinds //; through the latter air is forced into the cone; dust is carried away through a cone Yu through a pipe through an exhauster into a cyclone.

After the earth is blown through a short iron sleeve, it falls on the rotating blades of the head 12, whose performance is equal to the sum of the productivity of both golov 9,

From the head / 2, the ground flies out in a continuous stream and with a force hits the removable screen 13 of white cast iron, as well as the grains of sand flying away from the screen; when this occurs, the secondary separation of the burnt clay from those grains of sand, from which for some reason clay has not been separated previously.

Adjusting the force of the impact of grains of sand on the screen is carried out (as in the first case) by changing the angle of the screen.

After hitting the screen, the flow of earth passes through the chamber, where it is blown with air sucked from below (from the open part of the sleeve) and moving towards the ground.

Dust is carried away through conduit 14, but the earth through a funnel enters an elevator 15, which feeds it into a chamber, not shown in the drawing, where the land is divided into fractions.

The subject matter of the invention.

A device for cleaning the grains of the burned earth from dust, etc., characterized by its use, in order to create friction between the grains of the burned earth of two sand discs with parallel axes made rotating in opposite directions.