SU1399275A1 - Glass melting process - Google Patents

Abstract

The invention relates to the glass industry, in particular, to the technology of glass melting by creating radioactive, optimal thermal stresses in all zones of a direct glass melting furnace. The purpose of the invention is to increase the productivity of the furnace while maintaining the high quality of the glass. The method of glass melting in a direct-flow furnace is that the charge and glass mass are affected by the incident heat fluxes in all zones of the furnace, while the heat flux in the zones of the furnace is kcal / mh: charging and melting zone of the charge (760-770 ) 10, cooking zone (550-

Description

20

The invention relates to glass industry, in particular to direct-flow glass melting furnaces, to methods for melting glass by creating rational, optimal, thermal stresses in all zones of the glass melting furnace.

The purpose of the invention is to increase the productivity of the furnace while maintaining JQ high quality glass.

The essence of the method of cooking is that the incident heat flux affects the charge and glass mass in all zones of the glass melting furnace 5, while the incident heat flux in the furnace zones is kcal / M: charge and melt charge zone (760-770) 1 O I cooking zone (550-570) homogenization zone (510-530) clarification zone (760 360). This will provide specific removals of 2600-3000.

When the heat stress is less than 7 60 1 O kcal / m h in the loading and melting zone, the dissolution of the quartz grains will be less intensive and the specific removal will not be 2 00-3000 kg / m day.

.ESL accept heat value. voltage over 770–10 kcal / mh, the temperature in this zone will be too high, which will lead to a reduction in the kiln campaign.

If the amount of incident heat flux in the cooking zone is less than 550-10 kcal / mh, then the glass melt will not be preheated, which is necessary for the averaging process to be performed at high quality. . „

If we accept the value of the incident heat flux greater than 570 10 kcal / mch, the heating of the glass mass will be ensured, however, the furnace campaign will be reduced due to the premature release from the core of this overheating zone.

In the homogenization zone, the magnitude of the incident heat flux (510-530) 5 (10 kcal / m.) Such heat flux is sufficient given the good preparation of the glass mass in the cooking zone by means of the heat stress optimally selected there.

If we take the heat stress in this zone is less than 51 Oh

value and this will lead to an unusually high heat consumption.

If we accept the value of the incident heat flux in the zone of clarification less than 360 10 kcal / m h, then a high quality provisioning of the glass mass will not be achieved and the products will have a defect on gas inclusion m.

thirty

35

45

50

If the value of the incident heat flux exceeds 760-10 kcal / mh, unreasonably high temperatures will be given in the area of the clarification zone, which will lead to premature wear of the bottom of the clarifying tray (the glass melt layer has an insignificant depth of 150-200 mm).

Figure 1 presents the oven, a longitudinal section; figure 2 - the same plan.

The furnace includes charging and melting charge zone 1, zone 2, glass forming, overheating (cooking) zone 3, homogenization zone 4, clarification zone 5, recessed channel 6, charging pocket 7, burner 8, smoke outlet 9, roof 10 ovens, bubble nozzles 11.

Example. The mixture enters the furnace through two loading pockets. In the loading and melting zone of charge I, it melts, and, more intensively, the flow of this process provides a special arrangement of the burners 8.- Next, the melt moves towards In the case of forced mixing with compressed air, through the nozzles 11 and the intense heat flux created in this zone by the burners 8, the residual quartz dissolves rapidly. Then the melt enters the overheating zone 3, where it is additionally heated and the viscosity decreases. The glass mass prepared for centering enters the homogenization zone, where, when forcedly mixed with compressed air through the nozzles 11, and under the influence of an intense incident heat flux created by the rational arrangement of the burners 8, it is optimally averaged

h kcal / mh, then it will not be achieved. The average glass mass goes to

Qualitative averaging, if this ve-zone of 5 detection and after presumably is more than 530–10 kcal / m h, rivani on the cheto brightening tray it will be technically unjustified — the recessed duct 6 moves

752

value and this will lead to unreasonably high heat consumption.

If we accept the value of the incident heat flux in the zone of clarification less than 360 10 kcal / m h, then a high quality provisioning of the glass mass will not be achieved and there will be a defect in gas inclusion m in the products.

0

Q

five

five

„

0

five

five

0

If the value of the incident heat flux is more than 760-10 kcal / m / h, unreasonably high temperatures will be created in the area of the clarification zone, which will lead to premature wear of the bottom of the clarifying tray (the glass melt layer has a small depth of 150-200 mm).

Figure 1 presents the oven, a longitudinal section; figure 2 - the same plan.

The furnace includes charging and melting charge zone 1, zone 2, glass forming, overheating (cooking) zone 3, homogenization zone 4, clarification zone 5, recessed channel 6, charging pocket 7, burners 8, smoke outlet 9, roof 10 ovens, bubble nozzles 11.

Example. The mixture enters the furnace through two loading pockets, 7. In the loading and melting zone of charge I, it melts, and, more intensively, the flow of this process provides a special arrangement of the burners 8.- Next, the melt moves towards an inclined hearth, and in the glass-forming zone 2, when forcedly mixed with compressed air entering through the nozzles 11 and exposed to an intense heat flux created in this zone by the burners 8, the residual quartz rapidly dissolves. Then the melt enters the overheating zone 3, where it is additionally heated and its viscosity decreases. The glass mass prepared for averaging enters the homogenization zone A, where, with forced mixing with compressed air entering through the nozzles 11, and under the influence of intense incident heat flux created by the rational arrangement of the burners 8, it is optimally averaged.

The averaged glass melt enters

on the fly. The evacuation of gases is ensured by a smoke outlet 9 located at the beginning of the roof 10.

Specific heat fluxes by furnace zones are listed in the table.

Claims (1)

Thus, the proposed method of glass melting makes it possible to increase the specific removal of glass melt to 2600-3000 kg / m day, and also, due to the optimal distribution of heat flux, it saves fuel and improves the quality of glass. Invention Formula The method of glass melting in the direct-flow furnace by applying a falling heat flux to the charge and glass mass in the furnace zones is different because, in order to improve the furnace performance, while maintaining the high quality of glass, the heat flux through the furnace zones is kcal / m h: s (760-770) -10 (550-570) .10 (510-530). 10 (760-360) -10 4 Beyond the lower download number 865 630 5 Beyond the top value1000 675 J ten ///////////////////// // 580 380 Reduced to 2000 kg / m day 3 700 900 Increased to 3000-3200 Phie. Thebes. 2 Compiled N. Borisova Editor M.Tovtin Tehred M.Didyk Proofreader A.Obruchar Order 2636/25 Circulation 425 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Subscription