SU34719A1 - Electric furnace for melting glass under vacuum - Google Patents

Description

In the main author's witness, the school No. 29903 describes an electric furnace for fusion under vacuum, which consists of two channels closed by hydraulic gates, arranged in o, f jeynopHOM material surrounded by a gas-tight housing. The channels contain a melted material with a resistance. One of the channels is horseshoe-shaped, horizontal and equipped with electrodes and charging equipment, and the other is vertical, which serves to add additional heating of the produced molten material that is poured into it through the threshold from the horizontal channel, Equipped, in the upper part with an electrode, and in the lower part the mouthpiece is lowered in the form of a hydraulic valve tank with a bottom electrode .. The tank is oiled in a hermetically sealed. product bath. The heating of both channels is done independently of each other.

In the proposed modified treat, the horizontal channel has the shape of a recumbent cylinder with two groups. located perpendicular to the axis of its electrodes mounted on the bottom bars, between which are placed

(115),:

a collector for supplying the degassed molten glass mass to the overflow into the vertical channel; the latter is provided with a ring electrode at the top, and a bottom electrode at the bottom.

In the imp of FIG. 1 shows a vertical longitudinal section of a glass melting electric furnace; FIG. 2 is a transverse vertical section of it; FIG. 3 is a side view of the furnace; FIG. 4 is a horizontal section of a part of the furnace and FIG. 5 is a vertical section of a variant in the vertical channel.

The device consists of an electric current heated at the resistance of the glass mass of the smelting section / (Fig. E), located inside a cylindrical ribbed steel casing 5, which counteracts atmospheric pressure and is equipped with convex bottoms 2 and 2a. The casing has observant fittings 4 fitted with hermetic portholes 6 of thermally stable glass. The pool 7 of the smelting section is equipped with two metal groups of different polarities, electrodes 8 and 8a, mounted on the current supplying tires 9, which are isolated through the walls of the casing 3 by means of hermetic

seals fitted with an insulating and air-tight gasket 10. Tires 9 are laid on bottom 1 $ x 12, 12 made of fire-resistant, glass-resistant and least electrically conductive at high temperatures of the material and covered with a layer 13 of zircon oxides, etc. isolation

The smelting compartment .7 is loaded with the charge compressed in the form of spherical briquettes supplied by the aid of the m located between the rear wall of the pool and the bottom 2a of a continuously operating vacuum feeder, pushing in 4, the briquettes of the piston 14 through the receiver 5 into the tube 16. The receiver is closed in vine 17 with a hydraulic valve of molten lead or other metal filling, due to the dilution, the pipe 16 to the level of float of the briquettes 18 before the discharge socket 19. The pipe is radially shaken (along the arrow "a. 4) in the compartment tube J6 with the help of the lever 21 box 22 rotating on the rod 20 attached to them, alternately; attracted by electromite 23, which act through the copper machines of the helmet 2, equipped with a hermetic observation window 25 with a thermally resistant glass window.

This process of melting concentrating mainly between groups of electrodes 8 and Za, the most gas-liberated particles of glass is collected in the collector .2 and, flowing under the partition 27, is poured through a drain 28 into a vertical channel 29 filled with a barometric column of glass absorbed from the working separation when v / kachivaniya gases from the casing 5.

the vertical channel 29 is lined with cylindrical refractory bars 57 and 32 mounted in column form on the base bar 5D attached to the bottom of the working compartment J and having ducts 34 vi provided with a metal bottom electrode 36 pressed down by the lever 35. The latter has a flow cavity 37 fed by cooling electrode water flowing through the tube 38- Bottom electrode 36 with anti-pole

A ring electrode 39 clamped between bars 31 and 31a serves to heat the glass mass in channel 29.

 Including, in itself, the lining of the barometric column (fitting to the casing 3 using insulated clamps 41, 41 and insulating gasket 42, hermetically bonding with a conical process 43 made of glass-resistant and refractory steel. 43 is welded with a flat ring 45 laid on the surface of the base bar 33 below the glass level.

The annular water-cooled tube is designed to constrict the flow-sensitive glass in the gap between the casing 43 and the beam 32 of the glass in order to stop the movement of the glass between the lining and the casing. Forehearth compartment 30 is assembled from radial sector-boards and bonding bandages, 55 and 53 kolyJ eobpaznyyu chamber provided tangentsyaln1mi nozzles 48 forming above the surface of the glass dv1 gayuschiys VR1H annular circumference (:) ovoy n) current flame gas that compensates losses heat transfer and heats the flame chambers of the 49 feeders, releasing glass into the automaton.

In the 2nd version (Fig. 5), the end Tsutuzer 43 of the barometric column is not immersed in the total glass mass of the production basin, but lowered into a separate annular channel. 5 (, molded in basement bar ЗЗа. The cooling tube 46a, installed against the upper seam between the base plate of the ЗЗа and bar 32,: protected from the fiery space with insulating insulating bars 5 /, radially pressed 1 "by ceiling plates 52, installed bandage 53. The base bar of the BHZ is resting on the fixed base 556 at the bottom, compressed by the bottom sector-shaped bars 54 when tightening the band 55.

 Present Image.

Electric oven modification

dL smelting of a hell of a depression

No.29903, distinguished by the use of a melting pool 7 installed in a cylindrical ribbed casing with convex bottoms 2, 2a and two groups of electrodes 8 and Sa arranged parallel to the longitudinal axis of the cylinder, mounted on the bottom bar x 12, 12, limiting the collector 26, which serves to sum degas: |

glass masses - under the partition 27 to the overflow 28, which contains a vertical downward channel 29, mounted from separate ring bars installed on top of each other, equipped with a hermetic insulation and clamping between them in the upper part of the channel an annular electrodes 39, designed to contact through the glass melt with the bottom electrode 36.