RU177814U1 - LABORATORY FURNACE FOR THE PROCESSING OF RADIO ELECTRONIC CROWBAR - Google Patents

Abstract

The utility model relates to the field of metallurgy and can be used to conduct and study high-temperature physicochemical processes, in particular when processing electronic scrap. A laboratory furnace for processing electronic scrap containing a lined case, inductor, crucible, water-cooled blast channels connected by a collector, evenly located around the circumference of the crucible perpendicular to the main axis of the furnace, with the possibility of reciprocating movement. It is additionally supplied with a vertical unloaded lance, which is made in the form of three concentrically arranged coaxially aligned pipes and a replaceable head with Laval nozzles installed in the lower part of the vertical unloaded lance, and is rigidly connected to the collector in the upper part of the laboratory furnace. Thus, when using a vertical unloaded lance in a laboratory furnace for processing electronic scrap, it is possible to achieve a significant increase in the degree of oxidation of metal impurities.

Description

The utility model relates to the field of metallurgy and can be used to conduct and study high-temperature physicochemical processes, in particular in the processing of electronic scrap.

Known induction vacuum furnace with a cold crucible (RF patent No. 2096713, publ. 11/20/1997), including an inductor, a cold crucible with a pan, forming an annular gap with a vacuum chamber filled with oxide-based powder, a lid with a hopper located on it and a vacuum lock, an unloading chamber, cooling water inlets and an ingot pulling mechanism.

The disadvantage of this invention is the frequency of operation and the inability to mix the material, due to the lack of a mixing device.

A well-known shaft furnace with a front electric heated mining sump for the processing of secondary copper-containing raw materials (Technology of secondary non-ferrous metals: Textbook for high schools. / Edited by Khudyakov I.F. - M .: Metallurgy, 1981. p. 129), containing the shaft of the furnace, gas duct, electrodes, slag bucket and sump. The charge materials are loaded into the furnace through the windows, after which the charge is melted. The melt from the internal furnace hearth is discharged through a siphon device into the front electrically heated horn-sump, in which 3 or 5 electrodes are installed. Black copper is discharged from the furnace through a hole in the bucket.

The disadvantage of this device is the use of a water furnace cooling system and a flue system, which significantly reduces the campaign of the furnace.

Known rotary melting furnace for processing non-ferrous metal waste (RF patent No. 2171437, publ. 07/27/2001), containing a cylindrical body, a burner, a loading hole and located on the cylindrical part of the furnace body of the sink for draining the molten metal and slag.

The disadvantages of this device are the lack of thermal insulation, which increases heat loss, and the lack of purification of exhaust gases, which negatively affects the environment.

Known high-temperature induction furnace (RF patent No. 2095714, 10.11.1997), which includes an inductor, a cold crucible, in which an inner crucible separated by a heat-insulating layer is provided with an upper and lower lid in which openings are made.

The disadvantage of this furnace is the frequency of operation of the apparatus, high heat loss and the absence of loading and unloading devices.

Known laboratory furnace for testing electronic scrap (RF patent No. 2211420, publ. 08.27.2003), adopted for the prototype, containing a lined body, inductor, crucible, blasting devices made in the form of water-cooled channels connected to the collector and perpendicular to the circumference of the crucible main axis of the furnace.

The disadvantage of this furnace is the formation of a thin hardened crust of metal with a thickness of 0.1-0.2 mm, the formation of a crust occurs due to slipping tangentially directed high-speed air jets.

The technical result is to increase the degree of oxidation of metal impurities in a laboratory furnace for testing electronic scrap.

The technical result is achieved by the fact that the furnace is additionally equipped with a vertical unloaded lance, which is made in the form of three concentrically arranged coaxially aligned pipes and a replaceable head with Laval nozzles installed in the lower part of the vertical unloaded lance, and is rigidly connected to the collector in the upper part of the laboratory furnace.

The device of the laboratory furnace for processing electronic scrap is illustrated by the following figure:

FIG. 1 is a side view of a laboratory furnace for processing electronic scrap,

FIG. 2 is a top view of a laboratory furnace for processing electronic scrap, where:

1 - a furnace containing an inductor and a lined housing;

2 - a crucible;

3 - blow device;

4 - blast water-cooled channels;

5 - collector;

6 - vertical unloaded lance.

A laboratory furnace for processing electronic scrap (Fig. 1) is a furnace 1 containing a lined housing, an inductor, a crucible 2 and equipped with a blasting device 3 made in the form of four blasting water-cooled channels 4, which are connected to the collector 5 (Fig. 2) and are located around the circumference of the crucible perpendicular to the main axis of the furnace so that it is possible to carry out reciprocating movements and supplying blast through the nozzles of the blow channels at an angle to the main axis of the furnace, along the main vertical axis pparata set unsubmerged vertical lance 6, which is in the form of three concentrically arranged tubes coaxially aligned and replaceable head with a Laval nozzle installed at the bottom of the vertical non-immersed tuyere, and rigidly connected at the top of a laboratory furnace with the manifold.

Laboratory furnace for the processing of electronic scrap is as follows. Radio-electronic scrap is melted in the crucible 2 (Fig. 1) under the influence of electromagnetic forces. When this occurs, the work of the vertical unloaded lance 6 to improve the processes of heat and mass transfer. When the melting of the scrap is achieved, the blasting device 3 is turned on, located around the circumference of the crucible 2 perpendicular to the main axis and the vertical unloaded lance 6 is turned off. Then the oxidized impurities are removed and a sample is taken to determine the metal content in it.

Thus, when using a vertical unloaded lance in a laboratory furnace for processing electronic scrap, it is possible to achieve a significant increase in the degree of oxidation of metal impurities.

Claims (1)

A laboratory furnace for processing electronic scrap containing a lined body, an inductor, a crucible, water-cooled blast channels connected to a collector, uniformly arranged around the circumference of the crucible perpendicular to the main axis of the furnace and made with the possibility of reciprocating movement, characterized in that it is equipped with a vertical non-immersed lance made in the form of three concentrically arranged, coaxially aligned pipes and a replaceable head with Laval nozzles, mounted vertically in the lower part th submersible lance, which is rigidly connected in the upper part to the collector.

Images