RU2639758C1 - Charge mixture for synthesis of structural and heat insulating units from cellular glass - Google Patents

Abstract

FIELD: construction.SUBSTANCE: charge mix for synthesis of structural and heat insulating units from cellular glass contains, wt %: HPP slag 35-45, metallurgical slag 5-10, broken glass 35-45, glycerine 3, boric acid 3, sodium fluoride 4.EFFECT: decrease in the foaming temperature and the resource intensity of the process, utilisation of slag.1 tbl, 3 ex

Description

The invention relates to building materials, and in particular to a technology for the manufacture of effective structural and heat-insulating glass materials.

Known raw mix for producing granulated foam glass (RF patent No. 2243174, publ. 12/27/2004, IPC С03С 11/00), including glass breakage, CHP slag, a binder - soluble glass, and a blowing agent - aluminum production slurry in the following ratio of components, wt .%:

Slag CHP 20.0-21.0 Sludge aluminum production 1.0-2.0 Soluble glass 8.0-10.0 Glass break rest

The disadvantage of this raw material mixture is the presence of hydrophobic carbon particles in the sludge, which does not allow the introduction of a large amount of blowing agent and, accordingly, reduces the amount of waste used.

The closest in composition is the composite mixture for the production of granular foam glass (RF patent No. 2287495, publ. 11/20/2006, IPC С03С 11/00), which includes glass breakage (we have glass cullet), CHP slag (we have a thermal power plant), soluble glass and dust electrostatic precipitators of silicon production in the following ratio of components wt.%:

Slag CHP 21.5-23 Dust of electrostatic precipitators silicon production 3.0-5.0 Soluble glass 7.0-8.0 Glass break rest

The disadvantage of the prototype is the high foaming temperature of 1003-1063 ° C.

The objective of the invention is to reduce the resource intensity of the technology of cellular glass without deterioration of its quality, cost reduction, utilization of slag TPP.

The technical result of the invention is to reduce the foaming temperature to 900-950 ° C, increasing the amount of TPP slag in the composition of cellular glass.

The problem is solved due to the fact that the mixture for the synthesis of structural heat-insulating blocks of cellular glass contains slag TPP, metallurgical slag, cullet, boric acid, sodium fluoride, glycerin in the following ratio, wt.%:

Slag TPP 35-45 Metallurgical slag 5-10 Cullet 35-45 Glycerol 3 Boric acid 3 Sodium fluoride four

The mixture for is prepared by fine grinding and thoroughly mixing the slag of a TPP, metallurgical slag, boric acid, sodium fluoride, glycerol and cullet. Thorough mixing is achieved by joint grinding of all components of the charge in ball mills. Grinding should be carried out until a specific surface area of 400 ... 600 m ² / kg is reached. In the process of grinding, the mixture is moistened to 4%.

Example 1

To obtain the mixture as raw materials, the following materials are used: TPP slag, metallurgical slag, boric acid, sodium fluoride, glycerin and cullet. The composition of the cellular glass in this case is the following, wt.%:

Slag TPP 35 Metallurgical slag 10 Cullet 45 Glycerol 3 Boric acid 3 Sodium fluoride four

The mixture is prepared by fine grinding and thoroughly mixing the slag of a TPP, metallurgical slag, boric acid, sodium fluoride, glycerol and cullet. Thorough mixing is achieved by joint grinding of all components of the charge in ball mills. Grinding should be carried out until a specific surface area of 400 ... 600 m ² / kg is reached. In the process of grinding, the mixture is moistened to 4%.

Example 2

To obtain the mixture as raw materials, the following materials are used: TPP slag, metallurgical slag, boric acid, sodium fluoride, glycerin and cullet. The composition of the cellular glass in this case is the following, wt.%:

Slag TPP 40 Metallurgical slag 10 Cullet 40 Glycerol 3 Boric acid 3 Sodium fluoride four

The mixture is prepared by fine grinding and thoroughly mixing the slag of a TPP, metallurgical slag, boric acid, sodium fluoride, glycerol and cullet. Thorough mixing is achieved by joint grinding of all components of the charge in ball mills. Grinding should be carried out until a specific surface area of 400 ... 600 m ² / kg is reached. In the process of grinding, the mixture is moistened to 4%.

Example 3

To obtain the mixture as raw materials, the following materials are used: TPP slag, metallurgical slag, boric acid, sodium fluoride, glycerin and cullet. The composition of the cellular glass in this case is the following, wt.%:

Slag TPP 45 Metallurgical slag 10 Cullet 35 Glycerol 3 Boric acid 3 Sodium fluoride four

The mixture is prepared by fine grinding and thoroughly mixing the slag of a TPP, metallurgical slag, boric acid, sodium fluoride, glycerol and cullet. Thorough mixing is achieved by joint grinding of all components of the charge in ball mills. Grinding should be carried out until a specific surface area of 400 ... 600 m ² / kg is reached. In the process of grinding, the mixture is moistened to 4%.

The process of obtaining structural and heat-insulating blocks of cellular glass includes the following stages:

- preparation of the mixture;

- forming blocks;

- foaming;

- annealing;

- mechanical processing of blocks.

The mixture is prepared by fine grinding and thoroughly mixing the slag of a TPP, metallurgical slag, boric acid, sodium fluoride, glycerol and cullet. Thorough mixing is achieved by joint grinding of all components of the charge in ball mills. Grinding should be carried out until a specific surface area of 400 ... 600 m ² / kg is reached. In the process of grinding, the mixture is moistened to 4%.

The preparation of foaming molds involves cleaning and coating their inner surface with a chalk or kaolin slurry to prevent glass from sticking to the metal.

The prepared mixture for structural heat-insulating blocks of cellular glass is uniformly loaded into molds, occupying 30-50% of their volume, and the mixture is manually compacted with a punch, trying to use constant pressure. The molds are closed and transferred to a foaming muffle furnace heated to 600 ° C. In the furnace chamber, the molds are mounted in a zone of constant temperatures.

The foaming temperature can vary between 900-950 ° C, depending on the amount of TPP slag in the charge for the synthesis of structural and heat-insulating blocks of cellular glass. Foaming time - 60 minutes The foaming period is followed by a quench step to fix the structure of the material. Since the surface layers may be supercooled at this stage, a stabilization step is provided at a temperature of about 600 ° C.

After exposure at 600 ° C for 30 minutes, the oven is turned off. Annealing of structural and heat-insulating blocks made of cellular glass occurs during spontaneous cooling of an electric muffle furnace for at least 5-7 hours.

After removing structural heat-insulating blocks from cellular glass from the molds, they are filmed to give an exact shape and size. As a result, blocks of heat-insulating structural cellular glass should be obtained, characterized by relatively low density and thermal conductivity with high compressive strength.

The table shows the properties of the synthesized structural and heat-insulating blocks of cellular glass.

Claims (2)

The mixture for the synthesis of structural heat-insulating blocks of cellular glass containing slag TPP, metallurgical slag, cullet, characterized in that it further contains boric acid, sodium fluoride, glycerin in the following ratio, wt.%: TPP slag 35-45 metallurgical slag 5-10 cullet 35-45 glycerol 3 boric acid 3 sodium fluoride four