Installation for plasma-chemical recovery of metal oxides

 

The invention relates to powder metallurgy and can be used to obtain powders of metal oxides. In the proposed installation comprising a device for loading raw materials, plasmogenerator, the reactor, the precipitation chamber, the filter and the collected powder according to the invention the precipitation chamber, at least two communicating sections with decreasing cross-section in place of their connection to education pinches the gas stream, one of the sections in the upper part is connected with the reactor, the other with a filter, and in the lower part of the section is made as a separate tapered pockets in the bottom part connected collections of powder. Provides high reliability, performance, installation and production of metal powder of high quality. 4 C.p. f-crystals, 1 Il.

The invention relates to powder metallurgy, in particular to installations for plasma-chemical recovery of metal oxides.

The known installation for producing granules by spraying bar stock (U.S. patent No. 3752610, NCI 425-6, 1973, RF patent №688282, MKI 22 D 23/08, 1977). Used heaters in these installations do not allow pererabativat the provide obtain fine granules. To increase the dispersion of the granules should additionally be processed in high-temperature gas stream.

Known device for heat treatment of particulate materials in high-temperature gas flow containing working chamber with plasma torches. In the upper part of the working chamber above the burner is a device for introducing a plasma-forming gas, and the lower part is the collection of the finished product (as the USSR №558758, MKI 22 F 9/14, 1975).

Known installation for plasma-chemical recovery of metal oxides containing a device for loading raw materials, plasmogenerator, the reactor, the precipitation chamber, the filter and the collected powder (Cypress S. S. and other Equipment, powder metallurgy. - M.: metallurgy, 1988, S. 56-58), selected for the nearest equivalent.

The disadvantage of this installation should include low productivity and lack of reliability.

The technical task of the invention is to improve the performance and reliability of the plant, as well as providing the possibility of producing metal powder of a higher quality.

The task is solved in that the installation comprising a device for loading raw materials, plasmagene saudies section with a reduced cross-section at their point of connection, one of which is in the upper part is connected to the reactor, and the other with a filter, and in the lower part of the section is made as a separate pockets in the bottom part connected collections of powder.

The problem is solved also by the fact that the reactor and the filter is installed on the upper part of the sedimentation chamber, the reactor and the filter can be installed vertically.

The problem is solved also by the fact that it is equipped with a control unit of the presence of hydrogen, and the monitoring unit installed on the outlet port of the filter in its upper part, and can also be accomplished by visual observation.

Installation for plasma-chemical recovery of metal oxides (see drawing) contains a device for loading of raw material, made in the form of four boot dispensers 1, plasmogenerator 2 mounted on the reactor 3, and the precipitation chamber 4.

Settling chamber 4 consists of two inter-connected sections 5 and 6. Sections 5 and 6 in the upper part is connected to the reactor 3 and the filter 7, respectively. Sections 5 and 6 of the collecting chamber 4 is performed with the reduced cross sections in 8 of their connection with the formation pinches on the path of gas flow from section 5 to section 6 in the upper part of the sedimentation chamber. part connected collections of powder 11, 12. On the top cover 13 of the filter 7 at the outlet port 14 has a control unit of the presence of hydrogen 15 made in the form of candles burning hydrogen with visual observation of her.

The device operates as follows.

Connected to a power source (not shown) plasmogenerator 2 forms a plasma jet in the axial direction of the reactor 3.

As a plasma-forming gas use reduction gas, for example hydrogen.

From the boot of dispensers 1, the oxide powder of the metal is directed into the plasma jet, where the evaporation of metal oxide and its restoration to the metal in the gas phase. A pair of metal condensed in the form of a (small) particles in the lower part of the reactor 3. The condensate in the form of larger particles of the powder is collected in the first along the gas flow sections 5 and is deposited in the pocket 9, smaller particles are entrained by the gas stream through like 8 in section 6 and deposited on the filter 7. The filter 7 provided with a device 16 for periodic shaking the powder. When shaken, the fine particles are deposited in the pocket 10 collecting chamber 4. Thus, the metal particles are separated according to mass and going in the collections of the powder 11, 12, respectively.

When the installation athrabeth.

The presence of hydrogen in a precipitation chamber 4 is determined visually by the presence of a flame at the node 15 control the presence of hydrogen. Monitoring the presence of hydrogen provides the reliability of the installation.

Structural features installation by performing the precipitation chamber into two sections allow you to catch the powder to divide it up into fine and coarse fractions, which ensures the quality and productivity of the installation.

Claims

1. Installation for plasma-chemical recovery of metal oxides containing a device for loading raw materials, plasmogenerator, the reactor, the precipitation chamber, the filter and the collected powder, wherein the settling chamber is made of at least two interconnected sections with decreasing cross-section in place of their connection to education pinches the gas stream, one of the sections in the upper part is connected with the reactor, the other with a filter, and in the lower part of the section is made as a separate tapering downwards pockets in the bottom part connected collections of powder.

2. Installation under item 1, characterized in that the reactor and the filter installed on ve is monitoring the presence of hydrogen.

4. Installation according to p. 3, characterized in that the control unit of the presence of hydrogen is installed on the outlet port of the filter at the top.

5. Installation according to p. 3, characterized in that the control unit of the presence of hydrogen made with visual observations.

 

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