SU1315317A1 - Method for manufacturing heat-insulating articles - Google Patents

Abstract

The invention relates to the production of building materials and can be used for the manufacture of thermal insulation products on a basis of super-fine refractory fibers. The purpose of the invention is to create a heterogeneous structure of flat and / or molded products, increase thermal properties and manufacturability of products, as well as reduce energy costs in the manufacture of products while maintaining their physical and mechanical properties. A method of manufacturing heat insulating products based on superfine refractory fiber includes preparing hydromass, sequential vacuum-forming layer B, each individual layer being molded for 5-50 seconds at a vacuum of 0.045-0.085 MPa, and heat treating the product after a set of the required thickness, 1 tab. (L SP with

Description

The invention relates to the manufacture of building materials and can be used for the manufacture of heat insulating products based on superthin refractory fibers.

The purpose of the invention is to create a heterogeneous structure of flat and / or shaped products, increase thermal properties and manufacturability of products, as well as reduce energy costs while manufacturing products while maintaining their physical and mechanical properties.

According to the proposed method, a hydromassage based on superthin refractory fibers with a solid-liquid ratio of 1:50 to 1: 250 is prepared. A vacuum-forming element of any shape is immersed in it and, at a given vacuum, the water is suctioned and the layer of the product is deposited on the filter base.

Example 3: Vacuum formations, an element is immersed in a hydromass consisting of a mixture of refractory fibers, water and a binder, taken at a solid-liquid ratio of 1: 105, and produced by increasing the thickness of the layer.

its hydraulic resistance is 25 gop hydromass when the magnitude of the rarefaction is increased, and the growth rate decreases. In about 060 MPa for 25 s. After a specified time, the vacuum-forming i of this vacuum-forming element is removed, the element is removed from the hydromass, extracted from the hydromass and dehydrated in a vacuum, the dehydration, pp р p „p 8, obtaining a layer of the product

jre

the accumulated layer, and a set of 30–30 mm is repeated, on which a hydromass is then applied, with a vacuum of 0.050 MPa for

hydromass.

The process of vacuum molding is continued until the products have the required thicknesses, after which the latter are removed and sent for heat treatment.

Example 1. The vacuum forming element is immersed in a hydromass, which is made of a mixture of refractory fibers, water and binder, taken at a solid-liquid ratio of 1: 105, and is produced at 40 80Q ° C 0.14–0.16 kcal / m-h degree, hydromass strength at a rarefaction value at compression of 2.5 kgf / cm. nor 0.085 MPa for 5 s. After

30 s, while receiving the next layer of products with a thickness of 20 mm. After 35 heat treatments, the surface layer has a density of 250-280 kg / m, and the second layer (substrate) has a density of 200-250 kg / m. On average, the product has a coefficient of thermal conductivity at

This vacuum-forming element is removed from the hydromass, and the last layer is dehydrated for 8 s, obtaining a product layer with a thickness of 7 mm, on which the hydromass is then produced at a vacuum of 0.045 Sp1a for 50 s, thus obtaining the next layer of products with a thickness 60 mm.

After drying, the surface layer .... has a density of 340-350 kg / m, and the substrate (second layer) has a density of 180- 220 kg / m, on average, the product has a coefficient of thermal conductivity of 0.12 0.13 kcal / mch deg., compressive strength 2.5 kgf / cm,

PRI mme R 2. The vacuum-forming element is immersed in a hydromass

0

This is made of a mixture of refractory fibers, water and. binds taken at a solid-liquid ratio of 1: 105, and produce hydromassage at a vacuum of 0.085 MPa for 50 s. After that, the vacuum-forming element is removed from the hydromass, the layer is dehydrated for 10 seconds and a layer with a thickness of 70 mm is obtained, to which a hydromassage set is then performed at a vacuum of 0.045 MPa for 5 seconds, thus obtaining the next layer of the product with a thickness of 10 mm. After heat treatment, the surface layer has a density of 350–380 kg / m, the second layer has a density of 200–220 kg / m, on average, the product has a heat conductivity coefficient of 0.16–0.17 kcal / mch – degree, compressive strength 4, 5 kgf / cm.

Example 3: Vacuum formations The element is immersed in a hydromass, consisting of a mixture of refractory fibers, water and a binder, taken at a solid-liquid ratio of 1: 105, and produces 5 gop hydromass at a rarefaction value of , 060 MPa for 25 s. After that, the vacuum-forming element is removed from the hydromass and dehydrated in, pp "p" "p 8 s, obtaining a layer of the product

40 80Q ° C 0.14-0.16 kcal / m-h degree, compressive strength 2.5 kgf / cm.

30 s, while receiving the next layer of products with a thickness of 20 mm. After 35 heat treatments, the surface layer has a density of 250-280 kg / m, and the second layer (substrate) has a density of 200-250 kg / m. On average, the product has a coefficient of thermal conductivity at

The application of the LIU directly changing in the manufacturing process by the magnitude and duration of the evacuation cycle in the limits indicated by the proposed method, in contrast to the constant cycle, in the known technical solution makes it possible to radiate heat-insulating products with different structure while improving their fabricability and improvement thermal performance.

By changing the parameters of product evacuation (the magnitude and duration of the dilution), plate products with a heterogeneous structure are obtained, for example, products with a compacted upper

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a layer with a bulk weight of 250-350 kg / m and a Rg of 2.5-3.5 kgf / cm and a less dense middle part i with a bulk weight of 150g250kg / m3 and a cut of 1.0-2.5 kgf / m. The thickness of the products can be 100-150 mm with and more.

In this case, as can be seen from the table, the thermal conductivity coefficient of fibrous products varies considerably with the application temperature and their JO bulk mass.

1000 0.18-0.20 0.16-0.17 0 1200 0.35-0.40. 0.25-0.30

With an increase in temperature of more than 25, the increase in the value of thermal conductivity of products with a low bulk density is ahead of the increase in this value of products with a high bulk density. Therefore, products with a high volume.:. 30 weighing 250–350 kg / m at temperatures of 1000–12 00 ° C. They are more effective when used.

Editor L. Gratshsho

Compiled by N. Kosheleva

Tehred A. Kravchuk Proofreader A. Ilyin

Order 2261/18 Circulation 524Subscription

VNIIPI USSR State Committee

on inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

74

The creation of diverse products and their use as a lining of thermal units allows the most rational use of their thermal properties and simultaneously increases the factory readiness of the lining.

Heat treatment of products after a set of the entire thickness of the product, in comparison with the known technical solution, which involves heat treatment of each layer after vacuum forming, reduces energy consumption in the manufacture of products.

Claims (1)

Invention formula, and A method of manufacturing heat insulating products based on superfine refractory fiber, which includes hydromass making, sequential vacuum forming of layers and heat treatment, characterized in that, in order to create a differently-dense structure of flat and / or molded products, to increase the heat-engineering properties and manufacturability of products , as well as reducing energy consumption in the manufacture of products while maintaining their physico-mechanical properties, vacuum-molding of each layer is carried out for 5-50 seconds under thinning NII 0,045-0,085 MPa,