SU885156A1 - Glass smelting furnace - Google Patents

Description

(54) GLASS FURNACE

The invention relates to the building materials industry, in particular to glass melting furnaces. Glass-melting furnaces are known; the cooking pool is a wall and the bottom of which is made of refractory masonry, the roof and hanging walls are also made of refractory masonry, the walls and the bottom of the pool, the roof and hanging walls are provided with insulation {. Closest to the proposed technical essence and the achieved result is a glass furnace on a stove containing a cooking basin with walls of electrofusion. refractory and heat insulation, ceramic floor bottom and heat insulation, and hanging walls and roof of refractory masonry and heat insulation located above the cooking pool 2. However, in known furnaces under conditions of rising cooking temperatures, with the change of electrofused refractories and intensification mode of cooling bars sharply increased heat loss to the environment. The presence of known insulation does not provide sufficient fuel economy, increase service life and improve working conditions, since the known heat-resistant concretes are difficult to manufacture, have relatively high thermal conductivity and have insufficient compressive strength. The purpose of the invention is to save fuel and increase service life. The goal is achieved by the fact that in a glass melting furnace with walls of electrofusion refractory and thermal insulation, a bottom of ceramic bars and thermal insulation and suspended walls above the cooking pool and a vault of refractory masonry and thermal insulation of the thermal insulation of walls are made of phosphate cellular concrete, phosphoceramite concrete and phosphoperlite, interconnected with the walls of the cooking pool with a phosphate refractory solution, thermal insulation of the furnace bottom and hanging walls from phosphokeramzit concrete, connected respectively to the bottom bars and the refractory masonry of the suspended walls with a phosphate refractory solution, and the thermal insulation of the furnace roof is made of layers of quartz flour stacked one over another.

lightweight bricks, sealing coating and rolled fiber insulation material.

Fig, 1 shows the oven, general view, longitudinal section; fig 2 is the same plan; Fig, 3 is the same cross section.

The stove consists of a cooking basin, the walls of which 1 are made of bakora, and the bottom 2 is made of fireclay, and the hanging walls 3 above the cooking pool and the roof of 4 made of dinas. The walls 1 of the cooking basin are provided with thermal insulation made of a multilayer of a layer of phosphate cellular concrete 5, phosphoceramite concrete 6 and phosphoperlite 7 connected to each other and with the back wall of the cooking pool by means of a phosphate refractory solution 8, the suspension walls 3 are provided with a thermal insulating layer 9 of phosphoramite , connected to dinas by means of phosphate refractory solution 10, bottom 2 has a heat-insulating layer 11 made of phospho-ceramsite, connected to chamotte by means of phosphate refractory solution 1 2, vault 4 is made of layers of quartz flour with sand 13, laid over dinas, lightweight silica stone 14, zircon sealing paste 15 and rolled kaolin fiber 16,

The physicomechanical properties of the thermal insulation layers are listed in the table.

The fixation of phosphate concretes to the refractory masonry is carried out with the help of a refractory mortar, creating a monolithic connection between the refractories up to 1800 ° C. The solution is prepared by mixing refractory aggregates (ground chamotte 75-80%, technical alumina 510%, refractory clay 10-15% and aluminum chromophosphate binder (AHFS) 35-50% over 100%),

AHFS is a product of the interaction of orthophosphoric acid, aluminum oxide hydrate and chromic anhydride.

At the places of contact with the insulation, the temperature of the outer surface of the bakor bar wall (to and more) sharply increases. Such high temperatures in the contact layer require the use of full-filled bars with a surface treatment; Otherwise, breakage of sflomass through the gating part may occur, followed by destruction of the insulation, therefore, it is impossible to use an insulating material with a temperature of its use below 1400 s for laying the first insulation layer.

In addition, more reliable insulation on a high-temperature solution with high heat resistance and sufficient glass resistance and

neutral to bakorovy, chamotte and dinas refractories.

The laying of the suspended dinas walls due to the absence of glass melt allows complete insulation of the walls without leaving the seams open. It is only necessary to take into account, as in the case of pool isolation, the possibility of contact reactions.

When insulating the bottom, it is necessary to take into account the mechanical strength of the insulation materials.

One of the main conditions for insulation is the thorough sealing of the entire masonry. In the case of an isolated, but not sealed layer, the insulation layer can be destroyed by thin gas, saturated with alkaline vapors, which leads to a rapid destruction of the insulation and burning of the roof itself.

Taking into account the above features of the insulation of baths, the results of the calculations and the indicators of the physicomechanical properties of new types of lightweight phosphate concretes and fibrous materials, it is proposed to insulate the individual elements of the refractory masonry of the glass melting baths in the following order: 250- 300 mm in three layers: the first, adjacent to the refractory masonry, phosphate cellular concrete with a thickness of 120 mm, the second - phosphoke ceramite concrete with a thickness of 60 mm, the third - phosphoperlit Noah 60 mm. hanging walls of a dinas basin with a thickness of 380 mm, phosphoceramite with a thickness of 120 mm; The roof of the dinas pool, 300-400 mm thick, is layered in the following order: quartz flour with a sand layer 114 mm thick, circus sealing coating 3-5 mm thick and rolled kaolin fiber 30-60 mm thick, brand VKR-1; the bottom of the cooking basin of fireclay with a thickness of 300 mm, phosphoceramisite concrete 200 m thick

In addition, insulation makes it possible to change the thickness of the bakor bars of the cooking basin to 100-120 mm, thereby reducing the consumption of expensive bakorovogo bar and improve the quality of products.

Operation of the furnaces and calculations of heat transfer through the bakorovka showed that with a thickness of 250-300 mm bakorovogo cooling bakorov bars at the level of glass melt irrational, because it does not provide the required decrease in temperature of its inner surface at the interface with glass mass and, therefore, practically does not affect the speed of interaction of the refractory with glass melt. Air cooling efficiency at 1.5-2 m per 1 m

masonry length increases dramatically with the thickness of bakorov bars 100-120 mm.

With a thickness of 100–120 mm bakorov bars and the above cooling mode, the furnace can work for a longer time and with less consumption of fused refractories.

1300 400 1200 800 - 1100 1670 1670 1670 1800

1300 1150

1550

3.5

2.5

1560

0.6 0.6 0.2

Claims (2)

1.Lambot M. Das Jsolieren von Glasschmelzofen Sprechsaal KeramI Glas, Email, Silik, 1968, 101, No. 22, p. 1018-1028. 2.Glaser Walter. Thermische Jsolierung von Glasschmelrwanner. Aufban und Befriebserfahrungen, Glastechn, 1972, 45, No. 10, p. 453-460.