RU2111932C1 - Method of production of cellular silicate material - Google Patents

Abstract

FIELD: manufacture of building materials; applicable in manufacture of heat-insulating articles based on water glass in form of plates, crust, filling material which may be used in construction of buildings and structures of civil, industrial and agricultural applications, and also in industrial power engineering including atomic power plants. SUBSTANCE: the offered method includes blending of heated up to 80 C water glass in the amount of 75-90 wt.% with sodium chloride in the amount of 3-10 wt.%, then, with filler - burnt rock of 0.063-0.1-mm fraction in the amount of 7-15 wt.% with subsequent holding at 60-80 C for 30-90 min; molding of articles and heat treatment in superhigh frequency field and holding at 200-350 C for 1-2 min per centimeter of article thickness. In addition, after holding, the mixture is granulated and blended with foamed fraction vermiculite in the amount of 10-50 wt.% per 100 wt.% of mixture and dried at 70-85 C up to moisture content of 10-30 wt.%. The offered method provides for: density of material of 180-350 kg/cu. m; compression strength of 0.6-1.9 MPa; thermal conductivity of 0.055-0.85 W/mC; moisture resistance of 2.3-2.9%. EFFECT: higher efficiency.

Description

 The invention relates to the building materials industry and can be used in the manufacture of heat-insulating products based on liquid glass in the form of heat-insulating and fire-retardant plates, shells, bulk material, which can be used in the construction of buildings and structures of civil, industrial and agricultural purposes, as well as in pro-energetics including nuclear power plants.

A known method of manufacturing a foam silicate material by molding a mixture of liquid glass with a fine porous aggregate, followed by heat treatment in a microwave field with a specific energy consumption of 0.7-1.5 kJ / cc, i.e. at a temperature of 180 - 200 ^o C [1].

The closest analogue to the claimed invention is a method for the manufacture of foam silicate material by mixing liquid glass heated to 50-60 ^o C with a portion of sodium chloride and then with a mixture of filler - silica fume with sodium chloride, molding the product and heat treatment at 350 - 370 ^o C for 3 - 4 hours [2]
The solved problem of the claimed invention is to obtain a heat-insulating material with increased mechanical strength while reducing the heat treatment time while maintaining the moisture resistance of the material.

This problem is solved by the fact that in the method of manufacturing foam silicate material by mixing heated liquid glass with sodium chloride and a filler, molding products and their heat treatment, heated to 80 ^o C liquid glass is mixed with sodium chloride, then with a filler - burnt rock fraction 0,063 - 0 , 1 mm, followed by exposure at 60 - 80 ^o C for 30 - 90 min, and heat treatment is carried out in a microwave field with exposure at 200 - 350 ^o C for 1 - 2 min per 1 cm of product thickness, and the ratio of the components is as follows ( in mas .%):
Liquid glass - 75 - 90
Sodium Chloride - 3 - 10
Specified burnt rock - 7 - 15
In addition, after exposure, the mixture is granulated, mixed with expanded vermiculite fractions of 0.063-1 mm in an amount of 10-50 wt.% Per 100% of the mixture and dried at 70-85 ^o C to a moisture content of 10-30 wt.%.

 An example embodiment of the invention.

The following materials are used:
liquid sodium glass, commercial, with a silicate module ms 2.5-3.5 with a density of 1.35 - 1.45 g / cc;
sodium chloride, marketable, particle size up to 0.5 mm;
burnt rock crushed to a fraction of 0.063 - 0.1 mm, for example, burnt sand and clay rock of the heaps of the Moscow coal basin of the Kireev mica factory producing expanded vermiculite. The composition of the burned rock is given in table 1.

 The method is as follows.

 Example 1

Sodium chloride is added to the liquid sodium glass with a molecular weight of 2.8 and a density of 1.43 g / cc, heated to 80 ^° C, and the mixed composition is poured into a working mortar mixer, to which a portion of ground to a fraction of 0.063 - 0.1 mm is pre-loaded. burned rock, mixed to a homogeneous state, the mixture is unloaded into a pan and kept in a thermostat at 60 - 80 ^o C for 30 - 90 minutes Then the mixture is laid out in molds, which are placed in a microwave oven, where it is heat treated at a temperature of 200-350 ^o C for a time of 1 to 2 minutes per 1 cm of the thickness of the product.

 Example 2

The mixture obtained in Example 1 after being soaked in a thermostat is granulated, for example, by rubbing through a grid with a 3 mm cell and mixed with expanded vermiculite of a fraction of 0.063-1 mm in a ratio of 100 to 50% by weight per 100 wt.% Of the mixture. % vermiculite, then the resulting composition is dried at a temperature of 70 - 85 ^o C to a moisture content of 10 - 30 wt.%.

The compositions of the mixtures and process parameters are given in table.2
The test results are presented in table. 3rd

Claims (1)

1. A method of manufacturing a foam silicate material by mixing heated liquid glass with sodium chloride and a filler, molding products and their heat treatment, characterized in that liquid glass heated to 80 ^o C is mixed with sodium chloride, then with filler - burnt rock fraction 0,063 - 0, 1 mm, followed by exposure at 60 - 80 ^o C for 30 - 90 minutes, and heat treatment is carried out in a microwave field with exposure at 200 - 350 ^o C for 1 - 2 minutes per 1 cm of product thickness with a ratio of components, wt.% :
Liquid glass - 75 - 90
Sodium Chloride - 3 - 10
Specified burnt rock - 7 - 15
2. The method according to claim 1, characterized in that after exposure the mixture is granulated, mixed with expanded vermiculite fractions of 0.063-1.0 mm in an amount of 10-50 wt.% Per 100 wt.% Of the mixture and dried at 70 - 85 ^o C to a moisture content of 10-30 wt.%.

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