RU2820367C1 - Bath glass-melting furnace - Google Patents

Abstract

FIELD: glass industry.

SUBSTANCE: invention relates to devices for production of glass, more specifically to design of a bath glass-melting furnace, and can be used in lighting engineering, defense and construction materials industry. Bath glass-melting furnace contains a melting tank, channels with molten metal, a window for charge loading, a heating system and a smoke removal riser, a duct. At the same time the window for charge loading is located in the filling wall of the tank, opposite the flow wall. Heating system and smoke discharge riser are located in the furnace roof. Duct is located in the flowing wall of the tank. Channels near the longitudinal walls of the tank are connected by a channel along the filling wall. Furnace additionally contains barriers with height of 0.4–0.6 of the tank depth, which divide the tank into a cavity with molten glass and channels with molten metal. Height of the obstacle is equal to the width of the channels. In the corners of the flowing wall of the tank there are chambers in which pistons are mounted, which are made with possibility of synchronous movement along the channels.

EFFECT: melting of glasses of ruby compositions, improvement of glass quality, saving of metal.

2 cl, 3 dwg

Description

The invention relates to devices for glass production, more specifically to the design of a glass furnace bath, and can find application in the lighting, defense and building materials industries.

A glass melting furnace with a metal bottom is known; heat exchange between the metal and the glass melt is limited due to the immobility of the metal and the distance from the longitudinal walls of the pool, clause 2450082 C03B 5/04.

The closest technical solution to the achieved result is a glass melting furnace containing a melting basin with a metal bottom, a window for loading the charge, a heating system, chambers with pistons, a wavy bottom, and. 1167156 class. С03В 5/04. 1985

However, such a furnace has disadvantages: high consumption of metal, chambers with pistons block access to observation of the glass melting process in the furnace, the ducts will quickly collapse, asynchronous movement of the pistons cannot create standing waves in the melts of metal and glass and, therefore, solve the problem of “dead zones” , i.e. corners and wall areas of the furnace basin.

Purpose of the invention: melting glasses of ruby compositions, improving the quality of glass, saving metal.

This goal is achieved by the fact that the furnace contains a melting pool, channels with molten metal along the longitudinal walls of the pool are connected by a channel along the backfill wall of the pool, barriers in the molten glass with a height of 0.4-0.6 of the depth of the pool, the height of the barrier is equal to the width of the channels, chambers with pistons located In the corners of the flow wall of the pool there are chambers in which pistons are mounted, designed to move synchronously along the channels, creating standing waves in the channels from molten metal and molten glass, intensifying heat transfer and mixing and brightening the glass, improving the quality of the melt. The heating system and smoke exhaust riser are located in the furnace roof. The window for loading the charge is located in the backfill wall of the pool. The duct is located in the flow wall of the pool.

To prevent the metal from overflowing over the barriers, three thermocouples are installed in the longitudinal walls of the middle and in the center of the backfill wall of the pool at the level of the top of the barrier, coordinating the movement of the pistons in the chambers.

At an obstacle height of 0.4 pool depths, heat transfer in the channels decreases; at 0.6 pool depths, heat transfer increases, but also energy consumption for moving the pistons increases; we assume an obstacle height of 0.5 pool depths.

The heating system contains six flat-flame burners with tuyeres on a flat roof; combustion products are removed through a smoke exhaust riser of the flat roof of the furnace.

Welded glass from the channels and the pool enters the production through a duct.

In FIG. 1 shows a preliminary design of the furnace, longitudinal section; Fig. 2 is the same plan of the pool, channels, chambers with pistons, in Fig. 3 is the same cross section.

The furnace contains a cooking pool 1, channels with molten metal 2, chambers with pistons 3, a window for loading the charge 4, a heating system 5, and barriers in the glass melt. 6, smoke exhaust riser 7, duct 8, thermocouple 9.

The oven works as follows.

The pieces of metal are pre-loaded into channels 2 to 2/3 of the height of the barrier 6, then the charge is loaded to the top of the barrier. The charge is fed into the furnace through the loading window 4, after which the heating system 5 is turned on.

Combustion products are removed into the smoke exhaust riser 7.

The metal melt formed after melting is distributed inside the volume between the nodes of standing waves. The metal particles oscillate, drawing charge and glass particles into the circuit, increasing the active contact surface of the charge with the melt and the latter with the molten metal. The movement of the metal melt is ensured by the movement of pistons 3 located in chambers with the possibility of synchronous movement along the channels near the longitudinal walls of the furnace basin.

Creating an active moving surface of the heat reagent/metal melt/ from below and a heat-receiving material/charge melt/ from above allows to improve the convective heat transfer from the metal to the raw material melt.

Improving the thermal characteristics of the process of heat transfer from the molten metal to the glass melt significantly intensifies the process and, therefore, increases the productivity of the furnace.

The continuous movement of standing waves of the metal melt creates intense bubbling of gases dissolved in the glass melt and their evacuation through the flame space of the furnace, which improves the quality of the melt.

Oven with a cooking basin area of 12 sq. m, pool depth 0.6 m, barriers in molten glass 0.3 m high, metal volume 1.2 cubic meters. m, productivity 12 t/day of glass.

The annual economic effect from the introduction of a furnace for the production of glass of ruby compositions at factories in the lighting and defense industries due to the transition to mechanized production of non-ferrous products will amount to 30 million rubles.

Claims (2)

1. A bathtub glass melting furnace containing a melting pool, channels with molten metal, a window for loading the charge located in the backfill wall of the pool, opposite the flow wall, a heating system and a smoke exhaust riser located in the furnace roof, a duct located in the flow wall of the pool, different the fact that the channels at the longitudinal walls of the pool are connected by a channel along the backfill wall, the furnace additionally contains barriers with a height of 0.4-0.6 of the depth of the pool, dividing the pool into a cavity with molten glass and channels with molten metal, while the height of the barrier is equal to the width of the channels, in the corners of the flow wall of the pool there are chambers in which pistons are mounted, designed to move synchronously along the channels. 2. A glass melting furnace according to claim 1, characterized in that thermocouples are installed in the middle of the longitudinal walls of the pool and in the center of the backfill wall at the level of the top of the barrier.

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