SU1440338A3 - Pneumatic loading arrangement for feeding pulverized or granulated material into metal melts - Google Patents

Abstract

A charger based on the principle of pneumatics for the transport of granular, pulverized inflammable and explosive materials, as well as materials of high density into the metal melt. The charger according to the invention consists of a wind-box (4) connected to the conical bottom of the material storage tank (1), of the cylindrical porous element (5) forming a structural unit therewith, of the exchangeably spacer (7), the tap (10) and the T-profile (11). The gas streaming through the porous element (5) is flowing into the bore of the spacer (7), carries the material particles with itself and the accelerated material arrives through the tap (10), by the aid of the T-profile (11) into the system of delivery ducts. In order to facilitate maintenance, the spacer (7) is connected to the wind-box (4) with a releasable bond (8).

Description

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This invention relates to a pneumatic loading device for supplying granular or pulverized resusable and explosive material, as well as material with high density to metal melts. The purpose of the invention is to simplify the regulation of the loading process.

The drawing shows the proposed device.

A storage bin 1 for storing materials receives a material intended for supplying or transporting, and the bin 1 is made airtight with a conical lower part and with a special opening through which it is loaded. The cone-shaped part of the hopper 1 ends with the flange 2. The air chamber 3 forms a unit with an interchangeable part of the flange 2 and is equipped with a sleeve 4 which clamps the porous element 5 in its upper part, while the lower part of the element 5 is installed in the base of the air chamber 3, the air chamber 3 communicates with the inlet pin 6, whereby a gas stream at a predetermined pressure is supplied to the device. The mixture of gas and material passes through the cylindrical hole of the spacer cylindrical sleeve 7, which is clamped by an easily removable or disconnected coupling system, and is also provided with a seal 8. The material flow is interrupted by an outlet 9, and the mixture of gas and material passes through through the T-shaped part 10 and. gets into the pipeline system. A strictly controlled amount of gas is introduced into the inlet pin of the T-shaped part 10, and the external branch of this part is connected to the injecting oxygen supply device through the feed line.

Since the T-piece 10 does not contain any structural element that could interfere with the free flow of material, it allows the flow of material to flow unimpeded (just like a normal pipeline). Due to this installation, it is possible to connect in series several feeders of two W1 and more bunkers for storing the pieces.

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Boot device) works as follows.

The material storage bin 1 is filled with the material to be purged, and then the outlet 9 is immediately blocked. supplying oxygen to the bath with liquid metal and simultaneously introducing a strictly regulated amount of gas into the inlet pin of the T-shaped part 10, the pressure in which excludes the likelihood of metal penetration internal part of the oxygen supply device. When the oxygen supply device is in the lower position, i.e. when the device is completely immersed in a bath of liquid metal, the material itself begins to flow, and this happens as a result of opening the outlet 9. Through the inlet pin 6, the gas begins to leak intensively between the material granules, and then passes through the porous element 5 and enters the spacer a cylindrical sleeve 7. Located on the upper bevelled part of the sleeve 7, the material granules are carried by a gas stream. The flow of the mixture of gas and material is significantly accelerated in the hole of the spacer sleeve and enters the T-shaped part 10 already with a sufficiently high kinetic energy. The gas / solids ratio is such that the mixture is very dense, and the gas content in the mixture is strictly conditioned. Thanks to the described method, it is possible to achieve that the material to be blown is pneumatically transported from the material storage bin to the bath of liquid metal through the supply line system and the oxygen supply device.

Since the material to be transported is fed to the cylindrical spacer sleeve 7 by its own weight, the material feed does not depend on its density or the size of the granules.

The safety of the device is significantly increased due to that.

that in the process of feeding the material, fluidization of the flow does not occur, and, consequently, neither mechanical nor abrasive overloading of the porous element occurs. The mixture flows to the spacer sleeve 7 flow in this case at a higher speed, and the spacer sleeve 7 can be easily and easily made of any material that is resistant to wear. The expansion sleeve 7 is clamped in the air chamber by means of an easily detachable connecting element 11, which ensures a quick and easy change of the sleeve.

The porous element 5 is made in the form of a cylinder with a vertical axis; therefore, the powdery fractions intended for feeding or transporting material are not deposited in the aperture of the porous element, which minimizes the need for cleaning and other maintenance operations.

A uniform material supply is guaranteed and at the same time there is a favorable opportunity to strictly control the amount of material supplied depending on the operation mode of the device, the quantitative expression of the material supply depends on the material flow rate that is formed in the boring hole of the spacer sleeve 7. Necessary regulation is carried out without

Changes in the stationary position are such that.

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lurgic processes using the same equipment. When the oxygen supply device is in the submerged state, it is also possible to sequentially introduce various materials one by one by opening the outlet 9 of one or another storage bin for materials or by simultaneously opening the outlet holes 9, resulting in a displacement of materials in the process. qe purge them.

Claims (1)

Invention Formula A pneumatic loading device for feeding sputtered and granulated material into metal melts, containing a material storage bin, vertically and concentrically mounted relative to each other to form an annular cavity communicated with a source of compressed air, a cylindrical body and an air chamber with inlet and outlet openings, respectively, in their upper and lower parts, the first of which are connected to the current cone-shaped part of the bunker, and oye - with the outlet nozzle by means of a sealing element, and a shut-off valve. 5 by the fact that. t l and - with a view any structural element, but only by controlling the pressure of the gas flow passing through the inlet pin 6. During the purging process (up to the point of complete immersion of the oxygen supply device), the gas flow pressure on the inlet side of the T-shaped part 10 eliminates the likelihood of metal leakage into the oxygen supply unit. The purge material flow begins at the bottom position of the oxygen supply device, i.e. in a fully submerged position, from the opening of the outlet 9. If you connect in series T-shaped parts 10 blowers of two or more bins 1 for storing materials, it is possible to perform a large amount of metal simplifying the regulation of the loading process; it is provided with a cylindrical sleeve mounted by means of a threaded connection in the outlet pipe with a partial arrangement of the upper part above the end of the outlet of the air chamber and along its axis and made with a through central hole and with a conical the outer surface at the upper end of the upper part, oriented upwards of the cone, with the specified sealing element located concentrically relative to the lower end of the sleeve, and the outlet nozzle is T-shaped with its vertical part facing the sleeve and with three passage boring holes, shut off valve mounted in. vertical part of the outlet.