SU1293126A1 - Bath glassmaking furnace - Google Patents

Abstract

The invention relates to the glass industry, in particular to the design of glass furnaces. The goal is to extend the glass furnace campaign by reducing the destruction of the side walls of the pool. The stove includes a cooking basin 1 with side walls 2 and protrusions 3 in them. The protrusions are made at a level of 1 / 2-2 / 3 basin depth from the bottom. The lower part of the protrusion is made with a bevel of 25-35 ° & to the horizontal plane. 2 Il. / ХА 77Л7 /// У // (. ГЧЭ со со со со O5 FIG.

Description

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The invention relates to glass industry, in particular to the design of glass furnaces.

In known glass melting furnaces, the weak point is the walls of the furnace basin, areas of which are particularly strongly destroyed at the level of the glass melt mirror.

The purpose of the invention is to extend the glass furnace campaign by reducing the destruction of the side walls of the basin.

Fig. 1 shows a glass furnace bath, a cross section; Fig, 2 - a fragment of the side wall with a ledge,

In the cooking basin of a glass melting furnace, in the zone of maximum temperatures, the glass mass in the upper stream moves in two directions: towards the charge loading and toward the flow wall. The bottom flow of the glass melt moves predominantly from the loading zone to the excavation. The boundary between these flows is located on a horizontal plane at a distance of 1 / 2-2 / 3 of the basin depth from the bottom.

The maximum thickness of the upper stream is in the charge loading area and reaches 1/2 of the basin depth. In the open mirror zone, the thickness of the upper stream is minimal and can be 2/3 of the basin depth from the bottom. At the interface of the streams, there are minimal velocities of the longitudinal glass melt. . The protrusion in the side wall, mounted at the interface of the upper and lower streams, is subjected to the least impact of these streams and is therefore less depleted. The protrusion itself has the least effect on these flows compared with the protrusion that is 6i, i; i and higher than or below the edge;

Installing a protrusion at a level less than 1/2 or more than 2/3 of the basin depth from the bottom does not allow to reduce the corrosion of refractories, since the protrusion itself in these cases will be washed by convection currents and be destroyed by their action, blocking the glass mass by corrosion products,

To reduce the destruction of the lower part of the protrusion of the vertical cell.

corrosion, this part must be performed with a bevel of 25-35. Performing a bevel angle of less than 25 ° results

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to the fact that gas bubbles are retained on the surface of the bevel, corroding it. If the bevel angle is more than 35 °, this leads to a decrease in the upper part of the protrusion, as a result of which the glass mass enriched with corrosion products enlarges downward to the bottom of the furnace.

Making a protrusion in the side wall at a level of 1 / 2-2 / 3 of the basin depth from the bottom (at the interface of flows) makes it possible to reduce corrosion in the upper, most dangerous part of the wall without changing the movement of convection flows of the glass mass, and thereby prevent the furnace from operating ,

The furnace includes a pool, walls 2 with protrusions 3 directed inwards with a bevel 4, arch 5, the bevels run at an angle of 25-35 ° to the horizontal plane.

An example of a specific embodiment of the furnace.

The 900 mm deep bath of the glass furnace on the side walls 2 has horizontal projections 3 made of 100 mm thick bakorovoy tiles, the lower part of the protrusion is made with a bevel 4 at an angle of 30 ° to the horizontal plane, Bakor protrusion extends 100 mm into the glass mass. The protrusion in the charge area is located at a level of 450 mm (which is 1/2 of the depth of the basin), and in the area of the open mirror at a depth of 600 mm (2/3 of the depth of the basin from the bottom)

The glass furnace bath works as follows.

The charge loaded into the furnace is melted by pelvic burners. Formed from the glass melt and the lower flow moves in the direction of generation,

In the zone of maximum temperatures located in the hone of the open mirror, a portion of the glass melt rises to the surface and moves in the upper stream in the direction of loading, in the direction of development, and also to the side walls. It is cooled and lowered from the side walls, forming transverse streams. When the glass mass moves down, it encounters an obstacle in the form of a horizontal projection 100 mm wide in its path. As a result, the glass mass movement slows down with a simultaneous change in direction.

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movement from vertical to horizontal. The presence of a protrusion in the side wall reduces the transverse flow of glass mass to the walls.

The speed of lowering the glass mass of the walls depends not only on the increase in the density of the glass mass due to the corrosion products of the refractory, but also on the depth of their lowering. When the depth is shallow, their speed decreases. At the same time, lowering of corrosion products in the zone of the upper glass mass flow is weakened. They are prevented by the presence of a protrusion and a small exchange of glass melt near the protrusion, since it is located on the border of the flow section. The maximum corrosion of refractories is marked by a circle around the surface of the glass melt. Corrosion products do not sink to the bottom of the pool, but are retained by a projection against the wall. This braking of the lowering of the glass melt with the products of corrosion of refractories allows an increase in the time

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m of their stay near the walls, which contributes to the creation of a layer of glass mass, enriched with corrosion products of refractories, having a greater viscosity than glass mass. This layer is a protective layer against further destruction of the refractory.

Thus, due to the protrusion located on the side walls at the interface of the flows, the corrosion of the bottom pillars near the side walls is reduced, which increases the campaign of the glass-melting furnace.

Claims (1)

Invention Formula A glass melting furnace bath comprising a cooking basin with side walls and protrusions therein, characterized in that, in order to prolong the campaign of the glass melting furnace by reducing the destruction of the side walls of the basin, the projections are made 1 / 2-2 / 3 the depth of the basin bottom. ////// Editor And, Casarda Compiled by A. Kolosov Tehred L.Oleynik Proofreader M, Sharoshi Order 339/23 Circulation 428Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 F (/ r.2