SU1286248A1 - Apparatus for cleaning gaseous mixture containing metallic powder - Google Patents

Abstract

This invention relates to the field of powder metallurgy, in particular, to devices for producing powders by spraying molten metals. Its use will improve the quality of cleaning and save material while intensifying the process. The device includes a chamber 1 with inlets 13 and a gas mixture outlet 14, filtering elements 6, a reservoir for liquid metal with a bottom 10 made with fins, while the heater 5 is installed in the chamber coaxially, the filtering elements 6 are placed in the heater 5, and the projections 3 are fixed in the device with an inclination between the chamber I and the heater 5. 1 sludge

Description

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Purified gas 1

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The invention relates to powder metallurgy, in particular to devices for producing powders by spraying molten metals, and can be used to purify industrial gas mixtures.

The aim of the invention is to improve the quality of cleaning, saving materials while intensifying the process.

The drawing shows a device for cleaning a gas mixture containing a metal powder.

The device consists of a chamber 1, having two cavities — an outer 2, in which protrusions 3 are inclined along the flow of the gas mixture, and an inner 4, formed by a coaxially mounted heater 5, filled with filter elements 6, for example, Raschiga balls held by the mesh 7 of the collector 8 with the molten metal 9 and the bottom 10 with the ribs 11 for dividing the liquid metal when cooled into granules, the outer wall of the heater 12 and the inlet pipes 13 and the gas outlet 14.

The filter works as follows.

When the gas mixture passes through the external cavity 2, it is preheated, and the thermal particles, colliding with the projections 3, are separated from the mixture and directed by the projections to the outer wall of the heater 12, where they melt, and the liquid metal flows into the collection 8. Leftover the particles in the gas mixture stream further pass through the inner 4 cavity of the chamber and, pushing against the elements 6 filling the cavity, are heated to the liquidus temperature, fuse with each other and also drain into the metal collector 8, and purified from metal gas powder comes out.

The application of the proposed device for cleaning a gas mixture containing metal powder in plants producing powders from low-temperature alloys solves the main problem — to protect the environment, which is the acceptable limit concentration of lead in the working air. It is 0.01 mg / m and tin is 6 mg / m. In addition, the molten particles of the powder, of the stack to the receiver, are immediately formed into certain granules and then used to create a scraper, thus saving considerable material.

The creation of obstacles to the movement of the flow of a gas mixture containing a metal powder, provides an intensification of the cleaning process, and in the outer

the cavity of the chamber, the inclined protrusions direct the movement of particles onto the heated wall of the heater, which ensures the preliminary cleaning of the gas mixture, and then, the passage through the internal cavity of the chamber and again hitting the heated

the obstacle is ensured by the complete purification of the gas mixture from the metal powder. The use of such a flow system makes it possible to increase the efficiency of the heater, since the heat generated on both sides

the walls of the heater are consumed in the chamber to heat the gas stream to the liquidus temperature of the metal powder.

During the operation of the proposed device does not require cleaning and replacement of the filter element.

The simplicity of the design of the proposed device allows it to be manufactured at any plant for painting.

Complete cleaning of the gas mixture from the metal powder is achieved by the fact that the gas tray meets in its path the protrusions of the outer cavity of the chamber, where the separation of large particles of powder occurs due to melting on the outer wall of the heater, and then passing through the inner cavity of the chamber, formed by the heater, the remaining particles are separated from the gas mixture by heated elements filling the internal cavity, where they are melted, and the purified gas is released through the nozzle to the outside.

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Claims (1)

Invention Formula A device for cleaning a gas mixture containing a metal powder, including a chamber with nozzles, supplying and discharging the gas mixture, filtering elements, a collector for a liquid metal with a bottom and a heater, characterized in that, in order to improve the quality of cleaning and to save materials, the device is equipped protrusions fixed with an inclination between the chamber and the heater, while the heater is located in the chamber coaxially, the filtering elements are placed inside the heater, and the bottom is provided with fins.