RU2669975C1 - Method for producing silicate glass - Google Patents

Abstract

FIELD: glass; technological processes.

SUBSTANCE: invention relates to a process for the production of silicate glass. Method includes dosing, averaging and blending the charge components, granulation of the charge, feeding the granular charge to the feeder of the plasma reactor and melting the charge in the plasma reactor with the effluent of the plasma generator for 1 hour. Melt is produced continuously. Transportation of the dispersed melt is carried out by the effluent stream of the plasma-forming gas of the plasma jet at a working power of the plasma torch of 14–16 kW and the flow of the plasma-forming gas is 2.0–2.2 m³/h in the bath of the glass melting furnace. Drainage of the glass mass is carried out through the working channel of the bath of a laboratory glass melting furnace.

EFFECT: method for the production of silicate glass is proposed.

1 cl, 3 tbl, 1 ex

Description

The invention relates to methods for producing silicate glass and can be used in the building materials industry.

The prior art methods for producing silicate glass.

The disadvantage of these methods is the high energy intensity of the process for producing silicate glass.

The closest solution to the proposed method in terms of technical nature and the achieved result is a method for producing silicate glass (Pollyak, V.V. Technology of building and technical glass and slag glass / V.V. Pollyak, P.D. Sarkisov, V.F. Solinov, MA Tsaritsyn. - M .: Stroyizdat, 1983. - 432 p.), Which consists in dosing, averaging and mixing the components of the mixture, granulating the mixture, periodically feeding the granulated mixture into the loading pocket of the glass furnace, melting the mixture in a glass furnace for 2 days continuous production of melts, transporting the dispersed melt into the bath of the glass melting furnace by gravity and draining the molten glass through an opening in the hearth of the glass melting furnace.

The disadvantage of the prototype is the high energy intensity and duration of the process for the synthesis of silicate glass.

The technical result of the invention is to reduce energy intensity and accelerate the process of synthesis of silicate glass.

The technical result is achieved by the fact that the proposed method for producing silicate glass includes dosing, averaging and mixing the components of the mixture, granulating the mixture, feeding the granulated mixture, melting the mixture, continuously generating the melt, transporting the dispersed melt into the bath of the glass melting furnace and draining the glass melt, the granulated mixture being fed continuously to the plasma reactor feeder and then to the plasma reactor, the charge is melted in the outgoing plasma reactor plazmoobrazovatelya stream for 1 hour transportation dispersed melt into a bath of the glass melting furnace is the exhaust stream of plasma gas of the plasma jet of the plasma torch at a power of 14-16 kW and the plasma gas flow rate of 2.0-2.2 m ³ / h, and the molten glass is performed through a drain production channel of a glass furnace bath.

The proposed method for producing silicate glass differs from the prototype in that the granular charge is fed continuously to the plasma reactor feeder and then to the plasma reactor, the mixture is melted in the plasma reactor by the plasma former effluent for 1 hour, and the dispersed melt is transported to the glassmaking furnace bath effluent stream of plasma gas of the plasma jet torch at a power of 14-16 kW work and the plasma gas flow rate of 2.0-2.2 m ³ / h a.

The supply of granular charge by the feeder to the plasma reactor allows to reduce energy consumption to 0.32 kW per 1 kg of glass mass, which is 2.5-4.7 times lower compared to the known method (table 1).

Table 1

Comparative characteristics of energy consumption for obtaining 1 kg of glass

Known method The proposed method 0.8 - 1.5 kW
(2800-5400 kJ) 0.32 kW
(1152 kj)

A comparative analysis of the technological operations of the known and proposed methods is presented in table 2.

table 2

Comparative analysis of technological operations of the proposed and known and proposed methods

Known method The proposed method Dosing, averaging and
mixing of the components of the charge
Charge granulation
Periodic feeding of granulated charge into the loading pocket of a glass melting furnace
Melting the charge in a glass melting furnace (2 days)
Continuous Melt Production
Transportation of the dispersed melt into the bath of a glass melting furnace by gravity.
Draining glass through a hole in the hearth of a laboratory glass melting furnace Dosing, averaging and
mixing of the components of the charge
Charge granulation
Continuous feed of granular charge into the plasma reactor feeder
Continuous feed of granular charge from the feeder to the plasma reactor
Melting the charge in a plasma reactor (1 hour)
Continuous Melt Production
Transportation of the dispersed melt into the bath of a glass melting furnace using an exhaust stream of a plasma-forming gas from a plasma jet of a plasma torch
Draining of molten glass through the production channel of a bathtub in a laboratory glass melting furnace

The analysis of known methods for producing silicate glass allows us to conclude that the claimed invention meets the criterion of "novelty."

Experimentally established optimal parameters for the production of silicate glass during the melting of a granular charge (table 3).

Table 3

Optimal silicate glass production parameters during melting of a granulated charge

power, kWt The consumption of plasma-forming gas, m ³ / hour Melt quality 12 1.8 Lack of fusion charge 2.0 Lack of fusion charge 2.2 Lack of fusion charge 2,4 Lack of fusion charge 2.6 The melt is homogeneous 14 ^* 1.8 Lack of fusion charge 2.0 ^* The melt is homogeneous 2.2 ^* The melt is homogeneous 2.2 The melt foams 2.6 The melt foams 16 ^** 1.8 Lack of fusion charge 2.0 ^** The melt is homogeneous 2.2 ^** The melt is homogeneous 2.4 ^** The melt is homogeneous 2.6 The melt foams eighteen 1.8 Lack of fusion charge 2.0 The melt foams 2.2 The melt foams 2,4 The melt foams 2.6 The melt foams

^{*, ** - optimal parameters receiving silicate glass.}

An example of obtaining silicate glass.

The following components were used to obtain silicate glass: quartz sand (GOST 22551-71), soda ash (GOST 5100-85E), chalk (GOST 17498-72), industrial alumina (GOST 30559-98) and dolomite (GOST 23672-79). These components were dosed in proportions in terms of pure oxides: SiO ₂ - 73.0%, Al ₂ O ₃ - 1.6%, CaO - 8.6%, Na ₂ O - 13.6%, MgO - 3.8 % and averaged using a laboratory mixer for 30 minutes, and then the mixture was granulated using a disk granulator, and fed into the feeder of the plasma reactor UPU-8M with a plasma torch GN-5P. After ignition of the arc of the plasma torch from the feeder, the granular charge was sent to a plasma reactor with a melting temperature of 7000-8000 K, a working power of 14-16 kW and a plasma-forming gas (argon) flow rate of 2.2 m ³ / h installed in the roof of a glass melting furnace. Within 1 hour, the charge in it was melted and the resulting dispersed melt was transported by a stream of outgoing plasma-forming gases of a plasma jet into the bath of a glass melting furnace. After filling in a bathtub of a glass melting furnace for 1 hour, the molten glass in a volume of 50 kg was poured through a production channel for subsequent molding of the products.

Claims (1)

A method of producing silicate glass, including dosing, averaging and mixing the components of the mixture, granulating the mixture, feeding the granulated mixture, melting the mixture, continuously producing the melt, transporting the dispersed melt into the bath of the glass melting furnace and draining the glass melt, characterized in that the granulated mixture is continuously fed into the feeder the plasma reactor and then into the plasma reactor, the charge is melted in the plasma reactor with a plasma former effluent for 1 h ca, the transportation dispersed melt into a bath of the glass melting furnace is the exhaust stream of plasma gas of the plasma jet of the plasma torch at a power of 14-16 kW and the plasma gas flow rate of 2.0-2.2 m ³ / h, and the molten glass forehearth drain channel is performed through laboratory glass bath ovens.