RU1792927C - Method of manufacturing heat insulating articles without their calcination - Google Patents

Description

The invention relates to the production of forged products and can be used for lining thermal units in the metallurgical, petrochemical, engineering and other industries.

A known method of manufacturing a concrete mixture, comprising mixing coarse aggregate with water, then with a mixture of cop and silica-containing additives, dust produced by siliceous lavas in the ratio of .9-24: 1-5 and fine filler.

The disadvantage of this method is with obtaining a dense concrete mixture with a high thermal conductivity.

A known method of obtaining heat-insulating heat-resistant concrete with a combination of HkpoeaHHbiM cement aggregate

the binder by injection molding either by low pressure or by vibration.

The disadvantage of this method is the production of heat-insulating heat-resistant concrete with high linear shrinkage and low temperature of application.

The closest technical solution is a method for preparing a light-concrete mixture from components, including mixing, moistening and vibrating them.

The disadvantages of this method are the low bulk density of products and high thermal conductivity.

The purpose of the invention is to reduce linear shrinkage and thermal conductivity of products.

This goal is achieved in that in a method for the manufacture of insulating non-fired products, including mixing filler and perlite with a binder, moistening the mixture and forming from

W

VI

divium, an aqueous solution of cellulose ether and methyl alcohol is used as a humidifier, containing 0.02-0.08% of dry matter by weight of the mixture, part of which is first treated with filler, then perlite is added, and then another part of this is added to the mixture of the same solution, mix, add to the thickener and the remainder of the same solution, mix and the resulting mass is pressed at a pressure of 3.0-3.5 N / mm2.

, As a binder, a mixture of calcium dialuminate and aluminate is used.

The method is as follows ..

An aqueous solution of cellulose ether and methyl alcohol was previously prepared at the rate of 0.02-0.08% dry matter by weight of the charge. Then, a granular filler, for example, chamotte fighting, was moistened with a part of the prepared solution before being wetted, perlite was added, after which the mixture was treated with another part of the prepared solution before being wetted. After stirring, calcium dialuminate and calcium aluminate were added as a binder and moistened again with the remainder of the prepared solution. The mass was mixed and pressed at a pressure of 3.0-3.5 N / mm2.

In each case, the ratio will be determined by the properties of these

components and requirements that go with burnt products.

The properties of non-fired thermal insulation products obtained by the proposed method, in comparison with

prototype properties are presented in the table.

. As can be seen from the table, products manufactured by the proposed method are characterized by lower values of linear shrinkage (linear shrinkage in use is reduced by 2-3 times), lower thermal conductivity (1.3-1.5 times less).

 . ..

Forms at l. and take

Claims (2)

1. A method for the manufacture of heat-insulating non-fired products, comprising mixing a filler and perlite with a binder, wetting the mixture and forming the products, heat treatment. the fact that in order to reduce linear shrinkage and thermal conductivity 6d: of products, for humidification, an aqueous solution of cellulose ether and methyl alcohol containing 0.020, 08% dry matter by weight of the charge, of which the filler is first treated, is added, then perlite is added, after whereupon another part of the same solution is introduced into the mixture, mixed, added to the cement and the remainder of the same solution, mixed and the resulting mass is pressed at a pressure of 3.0-3.5 N / MMj. 2. The method of pop. 1, with the fact that a mixture of calcium dialuminate and calcium aluminate is used as a binder. Table continuation