SU1622290A1 - Glass-making furnace - Google Patents

Abstract

The invention relates to the glass industry, in particular to continuous glass melting furnaces for producing glass granules. A glass furnace can expand the sizes of borosilicate glass granules produced. Glass-making lie contains a cooking basin and under its drain channels, Under includes a fixed and central moving section. The central section of the hearth is made in the form of a downwardly extending truncated cone, installed with the possibility of rotational motion in the cone-shaped hole of the fixed part of the hearth. The drain channels are located along the articulation line of the movable and fixed sections of the hearth. The length of the drain channels is H 8R, where R is the radius of the cross section of the drain channel. The angle at the apex of the truncated cone of the movable part of the hearth is 3-8P. In the fixed part of the hearth heating elements are installed. 2 Cpfly, 7 ill., 2 tab.

Description

The invention relates to the glass industry, in particular to continuous glass melting furnaces for producing glass granules.

The aim of the invention is to expand the sizes of borosilicate glass granules.

Figure 1 shows the structure of a glass furnace, a section; figure 2 - section aa in figure 1; nafig.Z-section BB in figure 2; in fig. 4-7 are cross-sectional variations of the channels.

A glass melting stove contains a cooking basin 1 and under 2.

Below 2 includes a central movable section 3. made in the form of a truncated cone expanding downwards, and a fixed section 4 with a cone-shaped opening.

The angle a at the tip of the truncated cone and the opening of the fixed part of the hearth is 3-8 °.

The drain channels 6 are located along the line 5 of the articulation of the movable 3 and the fixed 4 parts of the hearth, each drain channel 7 includes two half-channels, one of which is made in the mobile 3. and the second in the fixed parts of the hearth. The channel length H is H 8R. The joint surface of the movable and fixed parts of the hearth, as well as the surfaces of the semi-channels, are made of a corrosion-resistant material, molybdenum.

The melted but not clarified glass melt reaches the hearth of the furnace and enters the drain channels. In the process of getting the jet into the tank 8, filled with water, granules of a certain size are formed.

The design of a glass furnace provides glass granules in a wide range of sizes without stopping the furnace for different grades of borosilicate l.

with

N N N H

WITH

The size of the granules for a group of glasses, in particular borosilicate, is determined by the diameter of the jet produced, which, in turn, is determined by the viscosity of the glass mass and the resistance to viscous flow.

The latter is determined by the contact area of the current flow of the glass mass (jet) with the channel surface equal to HP, where H is the channel extension; P is the perimeter of the channel cross section.

Example. Production of glass granules of the required size of a number of borosilicate glass grades, for example C52-1, C40-1, C35-1.

It is known that high quality glass is provided by using glass granules with a size of 2-3 mm, which, in turn, is provided by using a drain channel with a radius of 5 mm.

Glass fiber granules were produced from borosilicate glasses with different viscosities (1500, 2200.2700 D) at a jet temperature (T) of 1380 ° C and a channel radius of (R) of 5 and 8 mm. The length of the drain channel was selected as H 1R, 4R, 6R, 8R, 10R, 12R, 14R (Table 1).

As can be seen from Table 1, for the most viscous glass (C35-1), the jet diameter remained constant under the condition (examples 3 and 6) for the channel radii of 5 and 8 mm.

For the least viscous glass (C62-1), the jet diameter remained constant under the condition H 8R (examples 1 and 4) both for the radius of the channel section R 5 mm and for R 8 mm.

Thus, an acceptable relationship between R and H is H 8R, since under this condition the diameter of the jet in the entire group of borosilicate glasses is ensured.

Glass granules with the C52-1 and C35-1 grades with different viscosities of the glass melt were manufactured in the furnace (Table 2). Obtaining granules of various sizes

provided by changing the perimeter of the cross section of the drain channels by displacing the central part of the hearth (rotation around the axis) relatively stationary by the value of Ctabl.2). With this value

the perimeter of the cross-section of the drain channels was 2lK (example 1 and 6, figure 4), 2nR + R (example 2 and 7, figure 5), 2JTR + 2R (example 3 and 8, fig 6), i InR + 3.6R (example 4 and 9, FIG. 7).

Claims (3)

1. A glass melting furnace, including a cooking basin and underneath with drain channels, characterized in that, in order to expand the sizes of borosilicate glass granules, under the a peripheral stationary section with a central cone-shaped, large base facing downward aperture, and a central section placed in the opening of this section can be rotated from the actuator of a central section of a truncated cone facing downwardly with a large base, the drain channels are located along the bottom sections of the bottom sections. 2. Furnace according to claim 1, from l and h, so that each drain channel is made of length H 8 R. where R is the radius of the cross section of the drain channel. 3. Furnace according to claims 1 and 2, characterized in that it is provided with additional heating elements in the fixed section of the hearth. table 2 FIG. one 5G A a Fig 2 Fig.Z FIG. five Not big part Loibuse CSGS / Я6 l 27W + 2R , 6R 2 holes with l 7ifi + 2R