SU1698217A1 - Mixture for manufacturing refractory silicate products - Google Patents

Abstract

The invention relates to the building materials industry and can be used in the manufacture of autoclaved products for the construction of furnaces, chimneys, heat ducts. The purpose of the invention is to increase the temperature of use and residual strength after heating to 1000 ° C. The raw material mixture for the manufacture of heat-resistant silicate products contains, in wt.%: Lime-sand living in a ratio of 1: 1 10.3-22.54; a mixture of chrome-manganese and silico-manganese slags in a ratio of 1: 4-4.5-37.5; silicate lump 3-15 and sand else. Moreover, the ratio of silicate blocks to the mixture of slags is 1; 1.5-2.5. The mixture provides strength after autoclaving of 33.2-52.6 MPa, after heating to 1000 ° C 11-90 MPa, after heating to 1000 ° C, and exposure to water for 28 days 11-90 MPa. 2 tab. yr

Description

The invention relates to the building materials industry and can be used in the manufacture of autoclaved products for the construction of furnaces, chimneys, heat ducts.

The purpose of the invention is to increase the temperature of use and residual strength after heating to 1000 ° C.

Example. Use the following materials:

lime-sand to slant in a 1: 1 ratio. sand - aggregate - with the activity of this silicate mixture in CaO 7.5–8.5%;

sodium silicate lump with silicate module 2.7-2.9;

granulated slag produced by silicomanganese and chromium manganese.

Table 1 shows the chemical composition of granulated silicomanganese slag and chrome-manganese slag.

The grind additive (from a mixture of slag and silicate lumps) has a grinding fineness equal to Itching 300.0-350.0 m2 / kg. ,

The manufacture of heat-resistant silicate products, such as bricks, is carried out according to the following technology.

Prepare the traditional lime-sand silicate mixture (lime and ne. 1: 1) with the content of active CaO

. 7.5-8.5%. In already extinguished silicate

the mixture is added to the ground additive and

mix the mass thoroughly. When

Yu

00

Yu

The mixture is further moistened. Samples were pressed (d 50 mm and h 50 mm) at a specific pressing pressure of 18-20 MPa and a molding moisture content of 5.5-6.5%. Autoclaving is carried out according to the 1.5 + 8 + 1.5 h mode at an overpressure (P) of 0.8 MPa.

Table 2 shows the composition of the raw material mixtures and the physico-technical properties of products based on them.

Claims (1)

Invention Formula Raw mix for the production of heat-resistant silicate products, including lime-sand in a 1: 1 ratio, silicomanganese slag and sand, characterized in that, in order to increase the application temperature and residual strength after heating to 1000 ° C, it additionally contains silicate-lump and chrome-manganese slag, which is in a 1: 4 ratio in a mixture with silicon-manganese slag in the following ratio of raw materials mixture, wt.%: Lime-sandy 10,10-22,54 This mixture of slag4.5-37.5 Sea l and cut-block3-15 Sand the rest moreover, the ratio of silicate blocks and this mixture of slags is 1: 1.5-2.5. Table 1 Spreadsheets