SU967968A1 - Electrical glass melting furnace - Google Patents

Description

The invention relates to the industry of construction materials. in particular, to devices for the production of glass, namely, to electric windows of charmed furnaces. A glass furnace with a hardened ice-machine and a partition of two mutually parallel fires is known. thrusting walls separating the working basin from the arched. For most designs of electric glass furnaces, especially low productivity up to 5-6 tons / day, it is impractical to change the known partition due to the considerable length for deep processing. This circumstance leads to the need for additional electrical heating of the stack of the masses of the recessed channel and the chamber by means of installation of electrical elements in them. The presence of electrodes (molybdenum, ceramic) in these areas of the furnace is extremely negative for the quality of the glass produced - due to the formation of bubbles on the electrodes and their subsequent release into the glass produced. Also known is an elega stetzlaken furnace containing a partition wall. separating the waste basin from the brewhouse. The partition consists of a molybdenum sheet, on three edges of the enclosed refrigerator, and two mutually parallel refractory walls, on both sides, protecting the refrigerator from contacting the glass mass 2. However, the overheat section of a known furnace cannot provide a reliable long service life yo as follows / reasons: the presence of the refrigerator does not allow the molten glass mass to enter the gap formed between the molybdenum sheet and the recess of the refrigerator. This circumstance leads to the direct contact of molybdenum with the material of the cooler, and in the subsequent "1" (after forming a layer of scale in the refrigerator) - to the destruction of the molybdenum partition caused by the formation of eutectic alloys (molybdenum-metal); mutually parallel refractory walls, between which is enclosed a P-shaped refrigerator with molybdenum sheets. This circumstance leads to contamination of the glass melt by the material of the refrigerator, and over time to the exit from p.

cooler with psycdhim oxidation of the molybdenum septum. . The aim of the invention is to improve the quality of glass, reliability and durability of the furnace.

The goal is to achieve an EGM that an electric glass melting furnace containing a partition wall comprising a molybdenum sheet fixed between parallel refractory walls is provided with a cover made of metal resistant to glass melt at t / 1300 ° C mounted on top. the partitions, the molybdenum sheet protrudes above the protoxl and is bent at an obtuse angle toward the cooking pool, and the seam between the parallel refractory walls around the perimeter of the molybdenum sheet is filled with refractory paste.

Figure 1 presents the oven, a longitudinal section; figure 2 - the same, .. cross-section; n fig.Z - section .A-L in Fig.-2 ..,. The stove consists of a cooking pool. 1, in which there are several pairs of plate-type electrodes 2 i located in two rus, recessed-. Channel 3, inclined channel 4 and the working pool 5.

The cooking basin 1 is separated from the working 5 by a partition from the molybdenum sheet 6 bent at an obtuse angle to the cooking pool 6. Contained between two mutually parallel refractory walls 7. The seam formed in the thickness of the molybdenum sheet 6 between two mutually parallel refractory walls 7 is filled with refractory paste 8 to trim the molybdenum sheet. 6 along its three sides. The top of the septum device is covered with a platinum-rhodium case 9, so that its lower edges are t-. from below the upper level of the melt of the cooking basin.

Cooking glass in the proposed furnace occurs in the cooking basin 1 under the layer of the charge. The welded glass mass, as the production flow moves downward, alternately passes the location of the upper, then lower row of electrodes 2, where it is almost completely brightened and homogenized, and then through the recessed channel 3 and the duct 4 enters the working pool 5,

from the glass mirror of which it is produced.

New constructive elements in the proposed furnace create the following positive effect: the bent 5 molybdenum sheet 6 provides a more expedient direction of the glass mass to the production flow and eliminates motionless dead ones. layers in the cooking basin and in the duct / thereby increase the quality

produced glass; refractory paste 8, covering the edges of the molybdenum sheet 6,; it creates complete tightness, protecting the molybdenum from the 15th combustion, and eliminates the use of a refrigerator; platinum-rhodium case 9: eliminates the penetration of air through cracks formed during the period of broods of the furnace. On the mutually parallel 20 refractory walls of the 7-partition wall and thereby eliminates the combustion of the molybdenum sheet 6.

The invention provides a high percentage of the yield of glass 25 and the high reliability of the furnace during its long operation.

Claims (2)

1. Gunther R. Bathrooms glassmakers ,,. new furnaces. M., State. ed-eo. lit. by building architech. and build. 1958, p.88 2. Tatevos NKM and others. A small-sized electric glass furnace for the manufacture of glass from E. glass, - glass and ceramics, 1978, 3, 55 s. ten. YES bJ