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INVENTION
Patent of the Russian Federation RU2095441
OVEN FOR ELECTROTHERMAL FUELS OF NOBLE METALS:
GOLD, SILVER, PLATINUM, ...
Applicant's name: Joint Stock Company "Irgiredmet"
The name of the inventor: Balikov SV; Byvaltsev V.Ya.; Yemelyanov Y.E .; Sinakevich AA
The name of the patent holder: Joint Stock Company "Irgiredmet"
Address for correspondence:
Date of commencement of the patent: 1995.12.05
The invention relates to non-ferrous metallurgy and can be used for furnaces of electrothermal brushless melting of precious metals, for example, "golden heads" cinder, schlich gold, cathode and cement sediments.
The essence: the furnace contains a body, a melting bath made of refractory brick and located in a frame that frames it from the outside, electrodes are lowered from above into the working space of the furnace. The frame is installed in the housing with the ability to rotate on the axes arranged diagonally, and is equipped with clamping screws.
DESCRIPTION OF THE INVENTION
The invention relates to non-ferrous metallurgy and can be used, for example, for brushless smelting of cinder "gold heads", schlich gold, cathode and cement sediments.
Known is a furnace for crucible melting of precious metals . Chamotte crucibles are installed in this furnace, in which the process of melting occurs due to external heating.
The disadvantage of the furnace for crucible melting is low productivity and a large share of manual labor (loading, casting, cutting of slag, ingot and crucibles). Chamotte crucibles used for melting "heads" can withstand 1-3 melts of highly aggressive slags. A small volume of melted "heads" makes it necessary to conduct preliminary deep fine-tuning of gravel concentrates, which reduces the extraction of free gold.
A DC furnace is known for reducing melting , which is taken as a prototype, as the technical solution closest to the claimed one.
The known furnace contains a water-cooled casing ; Refractory lining with graphite crucible, made of two parts in height; Refractory backfilling; Electrodes falling into the working space; Bottom anode, made in the form of a cylindrical bath of graphite.
The disadvantage of the known furnace is that it is complex in design. Another disadvantage is that when smelting cinder containing iron oxides, contamination of the alloy with impurities occurs because of the use of graphite, which is a reducer of iron and non-ferrous metals from oxides.
The task to solve the claimed invention is to improve the quality of the alloy by reducing the impurity content in it, and to reduce operating costs by simplifying the design and reducing the material consumption of the furnace.
The above technical result is achieved in that in a furnace for electrothermal melting of precious metals containing a body, a melting bath, a refractory lining, electrodes falling into the working space from above, the melting bath is made of refractory bricks according to the invention and is located in a frame flanking it from the outside, which Is mounted in the body with the ability to rotate on the axes arranged diagonally, and is equipped with clamping screws.
The execution of the refractory brick melting bath excludes, in contrast to the prototype, contamination of the alloy with various impurities, which are recovered from the cinder when interacting with the surface of the graphite crucible, i.e. Improves the quality of the alloy.
The presence of a frame with clamping screws, framing the bath from the outside, allows to reduce operating costs, because If it is necessary to dismantle, it is sufficient to press the screws and replace the bricks or turn them toward the reaction zone by another (opposite) surface. In addition, such an execution allows you to eliminate the gaps between refractory bricks and thus eliminate the setting of gold in the lining. The installation of a frame on axes arranged diagonally makes it possible to selectively dispense the melt by rotating the melting bath on the axes.
Comparative analysis of the proposed furnace with the prototype shows that the proposed furnace differs from the prototype. Thus, the claimed technical solution meets the criterion of "novelty". To prove the conformity of the proposed invention, the criterion "inventive step" was compared with other technical solutions known from sources included in the "prior art".
The proposed furnace for electrothermal smelting of precious metals corresponds to the requirement of "inventive level", because Provides an increase in the quality of the alloy due to a decrease in the impurity content in it, and a reduction in operating costs due to simplification of the design and a decrease in the material consumption of the furnace, which should not be explicitly known from the prior art.
 1 shows a general view of a proposed furnace |
 FIG. 2 the same, top view |
The furnace for electrothermal melting of precious metals consists of a rectangular-shaped melting bath made of refractory bricks 1 and located in a frame 2 framing it from the outside. The frame is made, for example, from a metal corner in the form of a basket and is equipped with clamping screws 3.
The frame is provided with axes 4 arranged diagonally and designed to rotate the bath. The axes 4 are fixed in the body 5. In the upper part of the bath there are electrodes 6. In the lower part of the bath there are a cord hole 7 and a tap hole 8.
THE OVEN WORKS AS FOLLOWING
The electrodes 6 are installed in the lower working position at the bottom of the bath. The source material is loaded into the interelectrode space, which melts when the voltage is applied. At the end of the melting, the bath is tilted by turning on the axes 4 and pouring the alloy of precious metals into the molds.
As the refractory bricks 1 wear out, the screws 3 are pressed, the bricks are taken out of the frame 2 and rotated towards the reaction zone with an undeveloped opposite surface, and if necessary replaced with new ones.
To prove the criterion of "industrial application" it suffices to say that the question of testing a pilot industrial design and further use of the proposed furnace at the Baley experimental factory is being studied.
CLAIM
Furnace for electrothermal melting of precious metals, containing a body, a melting bath, a refractory lining, electrodes falling into the working space from above, characterized in that the melting bath is made of refractory brick and is located in a frame that frames it from the outside, Located diagonally along the axes and equipped with clamping screws.
print version
Date of publication 17.11.2006гг
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