SU730651A1 - Packing mass for heat-insulating of hot surfaces - Google Patents

Description

The invention relates to techniques for producing thermal insulation materials for industrial thermal insulation.

Known raw mix for the manufacture of thermal insulation, including hydrated lime, perlite sand and water [1].

Closest to the proposed by the achieved result is the mass for thermal insulation of hot surfaces [2], including, wt.%:

mass is not hardened at these temperatures, which is its disadvantage.

The purpose of the invention is to reduce the curing temperature.

This goal is achieved in that ^s packing material for thermal insulation of hot surfaces, including expanded perlite .. sand, lime, sodium hydroxide and water, contains components in the ratio, wt.%. \ Expanded perlite ⁰ sand 55 - 57

Expanded Perlite Sand

Lime (Ca (OH) ₂ ) Sodium hydroxide Water

- 90

10-15 ² ~. ⁴ 15

- 25

The heat-insulating material from the mass of the specified composition is obtained by firing technology in the form of various products (plates, shells) in furnaces at 700-750 ° C. 20

In industrial thermal insulation, isolation of a complex configuration and seamless large arrays operating at relatively low temperatures up to 400 ° С are necessary. Specified Composition

Hydrated Lime 6-7

Sodium hydroxide 3-4

Water33—35

After thorough mixing, the mass is formed by packing with a compaction coefficient of 1.8-2.0 directly on the insulated surface. The hardening of the material occurs during operation.

Example. Prepare three composition, wt.%:

1. Swollen perlite sand 57. Lime (Ca (OH) ₂ ) 6.5

Sodium hydroxide 3,5 Water 33 2. Expanded perlite sand 57 Lime (Ca (OH) g) ⁶ 5 Sodium hydroxide 4 Water 33 3.Expanded perlite sand 56 Lime 1> 0 Sodium hydroxide 3 Water 34 Hardening of the masses occurs at temperature re up to 400 ° C. Received thermal insulation material 15 characterized by the following properties: Volumetric mass, kg / m ³ 300 - 350 Tensile strength at compression, kgf / cm ² 9-10 Application temperature, ”C up to 500 20 Heat transfer coefficient nost, kcal / m 'hour · hail 0.06 - 0.07 Linear coefficient thermal expansion (20-500 ° C) 16 · 10 ^β 25 Apparent porosity,% 70 - 75 True porosity,% 70 - 76

Heat resistance, (air heat exchangers 5OO-2O ° С) More than 50

The insulation obtained from the packed mass is seamless, has high thermal insulation properties, is hardened during operation.

Claims (2)

(54) NAID MASS FOR THERMAL INSULATION OF HOT SURFACES The invention relates to a technique for producing heat insulating materials for industrial thermal insulation. The known raw material mixture for the manufacture of thermal insulation, including slaked lime, perlite sand and water 1. Closest to the proposed result achieved is a mass for heat insulation of hot surfaces 2, including, wt.%: Expanded perlite 85 - 90 10 - 15 Lime (Ca (OH) a) 2-4 Sodium hydroxide 23–25 Thermal insulation material from the mass of the composition indicated is obtained by roasting technology in the form of various products (slabs, shells) in kilns at 700–750 ° C. Insulated thermal insulation and seamless large arrays operating at relatively low temperatures of up to 400 ° C are required in industrial thermal insulation. This mass composition is not strengthened at these temperatures, which is its disadvantage. The purpose of the invention is to reduce the curing temperature. This goal is achieved by the fact that the padded mass for thermal insulation of hot surfaces, including all perlite | perlite.; EcoKj lime, sodium hydroxide and water, contains components in a ratio, wt.%: Expanded perlite sand55 - 57 Hydrate lime6-7 sodium hydroxide 3-4 Water 33 - 35 After thorough re-milling, the mass is molded by packing with a compression ratio of 1.8-2.0 1 FMLO on the insulated surface. U1) matchen / ial's development occurs during operation. Example. Preparing three compositions, wt.%: 1. Exhausted zerlite. 1.y sand. Lime (Ca (OH) 2) 6.5 G1f0oknits sodium 3.5 Water .33 2. Expanded perlite sand57 Lime (Ca (OH) 2 ) 6 Sodium hydroxide 4 Water 33 3. Pulled perlite sand56 Lime 7 Sodium hydroxide 3 Water .34 Mass hardening occurs at temperatures up to 400 ° C. The resulting heat insulating material is characterized by the following properties: Bulk mass, kg / m 300 - 3 Limit of FOCUS gfy compression, kgf / cm 9 Application temperature, C to 500 Heat conduction coefficient, kcal / MchaGrad 0.06 Coefficient of linear thermal expansion (20-500 ° С ) Porosity is apparent,% Porosity is true,% Heat Resistance, (air heat exchangers 500-20C) More than 50 Insulation, obtained from ramming mass, has a high heat insulating property, is adversely affected by the Xttuatation process. Claims for thermal insulation of hot surfaces, including expanded pearl sand, limestone, sodium hydroxide and water, characterized in that, in order to reduce the curing temperature, (it contains, (wt.%): The expanded pearlite sand55 - 57 Gndratna lime6-7 Sodium hydroxide 3-4 Voda33 - 35 Sources of information, U) into account when examining 1.Faktorovich LM Teplova insulation. L., Nedra, 1966. 2. USSR author's certificate number 380623 ,. south. From 04 To 43/00, 1971.