RU2604731C1 - Artificial porous glass gravel - Google Patents

Abstract

FIELD: glass.

SUBSTANCE: invention relates to the industry of making artificial porous glass gravel. Artificial porous glass gravel as raw materials contains scrap glass, glycerin, soluble glass, thermal power plant slag in the following proportions, wt%: thermal power plant slag 25-35; scrap glass 65-55; glycerin 8; soluble glass 2.

EFFECT: technical result consists in reduction of foaming temperature up to 850-870 °C, increase in number of thermal power plant slag in the composition of artificial porous glass gravel.

1 cl, 1 tbl, 3 ex

Description

The invention relates to the industry of building materials, in particular an analog of granular foam glass, artificial porous glass gravel, used as an effective heat-insulating material in various building structures for insulation, for example, walls, floors, roofs of industrial and civil buildings.

Known raw material mixture for producing granulated foam glass (RF patent No. 2243174, publ. 12/27/2004, IPC C03C 11/00), including glass breakage, CHP slag, a binder - soluble glass and a blowing agent - aluminum sludge 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. November 20, 2006, IPC C03C 11/00), which includes glass breakage (we have a glass cullet), CHP slag (we have a TPP), 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 consumption of the technology of glass gravel artificial porous without deterioration of its quality, cost reduction, utilization of slag TPP.

The technical result of the invention is to reduce the foaming temperature to 850-870 ° C, increasing the amount of TPP slag in the composition of artificial porous glass gravel.

The problem is solved due to the fact that artificial porous glass gravel contains TPP slag, cullet, soluble glass, glycerin in the following ratio, wt. %:

Slag TPP 25-35 Cullet 65-55 Glycerol 8 Soluble glass 2

The process of producing artificial porous glass gravel includes the following stages:

- preparation of the mixture;

- molding of granules;

- foaming;

- cooling.

The mixture for artificial porous glassgravity is prepared by fine grinding and thorough mixing of TPP slag, glycerin and cullet. Thorough mixing is achieved by joint grinding of all components of the charge in ball mills. Grinding should be done until a specific surface area of 400-600 m ² / kg is reached. Humidity of the mixture up to 4%.

The prepared mixture is granulated on a plate granulator with irrigation with an aqueous solution of soluble glass, the granules are dried on a belt-mesh dryer at a temperature of 400 ° C to a moisture content of 2%. The obtained granules are transferred to a foaming muffle furnace heated to 500 ° C. In the furnace chamber, the molds are mounted in a zone of constant temperatures.

Foaming temperature 850 ° C, foaming time 30 minutes The foaming period is followed by a quench step to fix the structure of the material. As a result, artificial porous glass gravel should be obtained, characterized by low density and thermal conductivity with sufficiently high compressive strength.

The table shows the properties of synthesized artificial porous glass gravel.

Example No. 1.

To obtain a mixture of artificial porous glassgravia, the following materials are used as raw materials: cullet, soluble glass, glycerin, and TPP slag. The composition of vitreous artificial porous in this case is the following, wt. %:

Slag TPP 25 Cullet 65 Glycerol 8 Soluble glass 2

The mixture for artificial porous glassgravity is prepared by fine grinding and thorough mixing of TPP slag, glycerin (blowing agent) and cullet. Foaming temperature 850 ° C, foaming time 30 minutes The foaming period is followed by a quench step to fix the structure of the material.

Example No. 2.

To obtain a mixture of artificial porous glassgravia, the following materials are used as raw materials: cullet, soluble glass, glycerin, and TPP slag. The composition of vitreous artificial porous in this case is the following, wt. %:

Slag TPP thirty Cullet 60 Glycerol 8 Soluble glass 2

The mixture for artificial porous glassgravity is prepared by fine grinding and thorough mixing of TPP slag, glycerin (blowing agent) and cullet. Foaming temperature 850 ° C, foaming time 30 minutes The foaming period is followed by a quench step to fix the structure of the material.

Example No. 3.

To obtain a mixture of artificial porous glassgravia, the following materials are used as raw materials: cullet, soluble glass, glycerin, and TPP slag. The composition of vitreous artificial porous in this case is the following, wt. %:

Slag TPP 35 Cullet 55 Glycerol 8 Soluble glass 2

The mixture for artificial porous glassgravity is prepared by fine grinding and thorough mixing of TPP slag, glycerin (blowing agent) and cullet. Foaming temperature 850 ° C, foaming time 30 minutes The foaming period is followed by a quench step to fix the structure of the material.

Claims (1)

Artificial porous glass gravel, containing TPP slag, cullet, soluble glass, characterized in that it additionally contains glycerin as a blowing agent in the following ratio, wt. %:
Slag TPP 25-35 Cullet 65-55 Glycerol 8 Soluble glass 2