SU767075A1 - Composition for making heat-insulating material and its preparation method - Google Patents

Description

one

The invention relates to the production of heat insulating materials, mainly to compositions and methods for manufacturing, or to heat insulating materials.

A composition comprising limestone-sand to quartz sand and expanded perlite sand 1 is known.

Thermal insulation products obtained from such a composition are not sufficiently high physicomechanical indicators. ,

The closest to the invention is a composition for the manufacture of a heat insulating material, comprising inorganic solid, ground sand, asbestos and expanded perlite sand 2.

The disadvantage of this K9 position is the impossibility of manufacturing on its basis high-strength large-size (more than 0.5 m in size) heat-insulating plates. To obtain such products from this composition, they are required to be kept for a long time at the maximum temperature during the autoclave treatment process, which

does not provide products with the necessary strength.

To obtain products from a known composition, a method is used, consisting in mixing the starting components, shaping the products from the resulting hydromass, followed by autoclaving and drying.

The disadvantage of this method

10 is a significant time for heat treatment of products when used, as well as their low final strength.

The aim of the invention is to reduce the heat treatment time while increasing the strength of the products.

The goal is achieved by the fact that the composition for the manufacture of heat-insulating material, including inorganic in ground, ground sand, asbestos, expanded perlite sand and water, additionally contains tripoli and boric

25 acid in the following ratio, wt.h:

Inorganic

ghosting 22-35

Ground sand - 3-20

thirty

Asbestos10-15

Expanded pearlite sand 20-25 Tremel 15-27

Boric acid 1-3

Water 300-600

Such a collocation can be carried out in a new way for the manufacture of heat insulating material by mixing the components, molding the products, followed by autoclaving and drying them.

When mixing the components, first mix the fluffy asbestos with boric acid, after which the other components are introduced.

Examples of the composition of the composition for the manufacture of insulating material are given in Table. one.

Table 1

The technology for producing products is as follows.

Suspended asbestos is mixed with water in a ratio of 1:10 in a paddle stirrer for 15–20 minutes to a degree of fuzzing of at least 90%.

Boron Acid weighed powder is added to the asbestos fluff mixer and mixed with asbestos for 5 minutes. Then, a measured amount of expanded perlite sand is added to the asbestos mixture, and, in the mixer, water is poured in an amount equal to half the amount required for the kneading, and the mixture is mixed for 2-3 minutes.

Stir dry Portland: Ment, lime, ground sand and Tripoli, the resulting mixture is poured into me-. shalka and add the rest of the water.

The hydromass is stirred for 10 minutes, after which it is poured into molds and is fed to a hydrothermal treatment in a 5 autoclave at a pressure of 8 MPa; 1/5 + 9 + 1.5 hours. After autoclaving, the products are dried at 150-200 ° C. .

The physicomechanical characteristics of the samples of the thermal insulation material obtained from the indicated compositions. With the application of the method, see Table. 2

As can be seen from the table, the use of the proposed composition for the manufacture of insulating material, carried out in a new way, reduces the heat treatment time of articles by 42% with an increase in strength by 13%.

Claims (2)

1. The composition for the manufacture of heat insulating material, including inorganic sticking, ground sand, asbestos, expanded perlite sand and water, is characterized in that, in order to reduce the heat treatment time while increasing the strength of the products, it additionally contains threes and boric acid in the following ratio, wt.h: Non-corporate ghosting 22-35 Ground sand 3-20 T a faces Asbestos 10-15 Expanded perlite sand 20-25 Trepel 15-27 Borna acid1-3 Water300-600 2. A method of manufacturing a heat insulating material from a composition According to claim 1, by mixing the components, molding the articles with their subsequent autoclave treatment and drying, characterized in that the fluxed asbestos is first mixed with boric acid, after which the remaining components are introduced. Sources of information taken into account in the examination 1. USSR author's certificate No. 485088, cl. From 04 To 13/12, 1973. 2. Stroitelni materi and silicate industry (WNR), 1969, No. 2-3, p. 11-14.