EA005246B1 - Glass for glass packing - Google Patents

Abstract

Glass for glass packing, comprising SiO2, Al2O3, Fe2O3, Na2O, K2O, CaO, MgO, FeO, TiO2, MnO, SO3, Cr2O3, characterized in that ratio FeO/Fe2O3 is 0.21 with the following component ratio, wt %: SiO2 71.50-73.50, Al2O3 1.00-2.10, Fe2O3 0.20-0.50, CaO 10.00-12.00, MgO 0.50-1.00, Na2O 12.30-13.50, K2O 0.01-0.15, FeO 0.10-0.33, TiO2 0.05-0.20, MnO 0.01-0.10, SO3 0.10-0.30, Cr2O3 0.21-0.25.

Description

The invention relates to the glass industry, namely the production of glass containers of green and brown tones.

Known glass for glass containers of the following composition, wt.%: 8ίΘ ₂ - 60.40; A1 ₂ O ₃ - 11.80; Te ₂ O ₃ - 1.40; CaO - 8.00; MDO - 0.30; Ea ₂ O 13.90; K ₂ O - 2.50; 8O ₃ - 0.30; Mp ₃ O ₄ - 1.34, T1O ₂ 1.40 [1]. This material does not have enough high water resistance.

Glass for glass containers, including components, wt.%: 8U ₂ 68.00-75.00; A1 ₂ O ₃ 0-5.00; iron oxides 0.5-1.5 with the ratio TeO / Fe ₂ O ₃ = 0.233; Ea ₂ O 10.00-18.00; K ₂ O 0-5.00; CaO 5.00-15.00; MDO 0-10.00; T1O ₂ 0-1.00; MpO 0.10-2.00, 8O ₃ 0.10-0.30 and Cr ₂ O ₃ 0-0.20, is the closest analogue of the invention [2]. The disadvantage of this composition are low indicators of chemical resistance to alkaline solutions.

The task that the proposed invention solves is to increase the water resistance and alkali resistance of glass, as well as expand the raw material base of the materials used by using rock-forming minerals as a batch material. The essence of the invention lies in the fact that in glass for glass containers, including 81O ₂ , A1 ₂ O ₃ , Te ₂ O ₃ , Ea ₂ O, K ₂ O, CaO, MDO, TeO, T1O ₂ , MpO, 8O ₃ , Cr ₂ About ₃ , the ratio of TeO / Fe ₂ About ₃ is 0.21, with the following ratio of components, wt.%: 81O ₂ 71.50-73.50; A1 ₂ O ₃ 1.00-2.10; Te ₂ O ₃ 0.20-0.50; CaO 10.00-12.00; MDO 0.50-1.00; Ea ₂ O 12.30-13.50; K ₂ O 0.01-0.15; TeO 0.10-0.33; T1O ₂ 0.05-0.20; MpO 0.01-0.10; 8O ₃ 0.10-0.30; Cr ₂ O ₃ 0.21-0.25.

The technical result of the invention is to improve the physico-chemical properties of glass for glass containers, reducing production costs, improving product quality and expanding the resource base in the glass industry.

The compositions of the proposed glass for glass provided in table. one.

Table 1

Components The content of mass% in the compositions 2 3 sic ₂ 72.40 71.50 73.50 A1 ₂ 0h 1.20 2.10 1.00 Re ₂ 0h 0.20 0.50 0.40 Ν3 ₂ Ο 13.00 12.30 13.50 K ₂ O 0.10 0.15 001 Cao 11.50 12.00 10.00 MDO 0.80 0.50 1.00 TU ₂ 0.15 0.20 0.05 Cr ₂ O _uh 0.21 0.25 0.10 ZOZ 0.25 0.30 0.1 Her 0.20 0.10 0.33 MpO, 0.05 0.10 0.01

For the preparation of the charge using the charge materials: quartz sand, soda ash, alumina, gypsum, limestone, carbon, portafer (Te ₂ O ₃ + TeO), portachrome (Cr ₂ O ₃ ), manganese paste, titanium dioxide, potassium nitrate and magnesium oxide .

In order to save costly materials (alumina, silica sand, magnesium oxide, portafera, potassium nitrate, etc.) in the technology of making glass for glass containers provide for the preparation of the mixture using the following composition, wt.%: 81О2 48-50; A1 &14-15; Te2O ₃ 4-5; CaO 8-8,5; MDO 5-5,5; Ea ₂ O 12.30-13.50; K ₂ O 0.010.15; TeO 0.10-0.33; T1O ₂ , 0.05-0.20; MpO 0.010.10; T1O ₂ 1-2; Р ₂ О ₅ 0.1-0.2.

In this case, basalt milled to a fraction of 0–3 mm is added to the mixture, withstanding the melting mode with the help of microprocessors, in which the components entering the glass are in the composition of the compositions of the proposed invention. From the comparison of glass and basalt, it follows that all the ingredients, synthesized glass, feed Cr ₂ O ₃ , are fully or partially introduced by natural basalt.

The mixture and ground basalt served in a continuous glass furnace. Temperatures in the zone of maximum of the glass furnace should not be below 1450 ° C. From the working part of a glass furnace, special feeders provide portions of glass mass for molding to glass forming machines.

An example implementation of the invention.

The mixture to obtain glass for glass includes the following materials:

silica sand - 1581, soda ash - 491, alumina - 22.72, gypsum - 14.8, limestone - 486.4, carbon fiber - 3.2, portachrome - 6, magnesium oxide - 3, basalt ground -37.5.

Molded glass products are installed on a transport conveyor and transferred to annealing furnaces (leres). After leaving the lehr, glass containers are sorted and packaged.

Properties of the proposed formulations of glass for glass are presented in table. 2

___________________ Table 2

Properties Indicators for glass composition one 3 Density, kg / m3 2570 2250 2610 microhardness, MPa 4300 4450 4200 Thermal expansion coefficient (α. 10 ⁷ ) degrees ** 90 91 93 Glass transition temperature te °, s 550 545 558 Start temperature 625 620 630

Softening TG ⁵ , C Water Resistance 0.01 N HC1_. ml 0.35 0.35 0.32 Alkali resistance,% 99.93 99.92 99.93

Laboratory melting and industrial testing have shown the possibility of obtaining green and brown tones from the proposed glass composition for glass containers.

The use of the proposed glass makes it possible to improve the quality of products in the glass industry, reduce production costs, expand the raw material base of the scarce materials used for the production of glass for glass containers.

Bibliographic data sources of information

1. "Glass". Edited by N.M. Pavlushin Stroyizdat Moscow, 1973, p. 374, Table 2;

2. I8 5776845.

Claims (1)

CLAIM Glass for glass containers, including δίθ ₂ , A1 ₂ O ₃ , Her ₂ O ₃ , Να ₂ Ο, K ₂ O, CaO, MdO, HerO, T1O ₂ , MnO, 8O ₃ , Cr ₂ O ₃ , characterized in that the ratio Its / O ₂ O ₃ is 0.21, with the following ratio of components, wt.%: 81O ₂ 71.50-73.50 A12O3 1.00-2.10 Her2oz 0.20-0.50 CaO 10.00-12.00 MDO 0.50-1.00 No. bO 12.30-13.50 K2O 0.01-0.15 Her oh 0.10-0.33 T1O2 0.05-0.20 MnO 0.01-0.10 8O3 0.10-0.30 SG2O3 0.21-0.25 4 ^^ Eurasian Patent Organization, EAPO