SU966078A1 - Raw mix for making wall products - Google Patents

Description

) RAW MATERIALS FOR THE PRODUCTION OF WALL

PRODUCTS

The invention relates to the production of ceramic building materials and can be used in the production of clay bricks, tiles, wall stones, etc. ,

The known raw material mixture for the manufacture of wall products 1, including the following components, wt.%:

ClayBase

Loessoid

breed22-27

Medsly slag. 20-25

The disadvantages of this raw material mixture are relatively high firing temperatures. , the volume weight of 1340 kg / m and the strength of the product is low 142 kg / sc.

Closest to the invention is the raw material mixture for the manufacture of wall products f2, comprising the following 4% by weight, wt.%:

Clay .65-70

Phosphoric slag

production 30-35

A disadvantage of the known mixture is the production of products at calcining temperatures of 700-900C with a strength of 1.6-17.9 MPa and a bulk Matsoy of 1310-1510 kg / m.

The aim of the invention is to reduce the firing temperature and the bulk density of the products, and to increase the strength.

This goal is achieved by the fact that the raw mix for making wall products, including clay and slag on the basis of S i., Contains fluorosilicate as alumina. slag 10 waste pyrohydrolysis production of hydrogen fluoride with the following relativeto components, wt.%:

Clay70-90

Fluorosilicate

15 slag - waste of pyrohydrolysis production of hydrogen fluoride 10-30

20 Fluorosilicate slag has a composition, May.%:.

Sodium oxide 22-24

Calcium Oxide, 4-6 Alumina. 1-3

25 Oxide 1gne. 2-5 Fluoro5 -12

Silicon oxide Ostalnbe When sintering ceramic mass containing 10-30% fluorosilicate

30 slag, the formation of a liquid phase occurs already at (whereas this temperature is higher in low-melting clays) ..

Due to this, a strong shard is formed at a much lower temperature.

As a result of chemical reactions between the components of clay and slag in the liquid phase, iron compounds are almost not formed, painting the shard in a brown-red color. Due to this, the shard is obtained in a light fawn color .;

When cooling the burned products. the liquid phase crystallizes with phosphorus slag (prototype)

Fluorosilicate slag As can be seen from the table, when the content of the slab in the mass of slag is less than 10%, the shaking of very small (1-2 μm) crystals, which leads to an increase in the strength of the brick.

Spackles are ground to a full pass through a 0.14 mm sieve and make up the ceramic masses with the glia of the Kostrovsky deposit. From the mass of the prepared samples, which after drying are calcined in a muffle. The samples are determined by compressive strength, water absorption, bulk density.

The test results are shown in table.

Soak

Also "

Underburning

A distortion of the sample shape is observed. Perura 700 ° C is not sufficient for nor 65 min. Firing of the samples. When the slag content is more than 3.0%, bending of the forks of the samples during firing occurs.

Thus, the optimal slag content in the ceramic mass is 10-30% by weight of the mixture.

With the introduction of fluorosilicate slag in the mixture in the optimal amount, it is possible to obtain a brick of increased strength with a reduced bulk density. At the same time, by reducing the firing temperature, fuel consumption can be reduced.

Claims (2)

Invention Formula The raw material mixture for the manufacture of wall products includes clay and slag on the basis of the fact that, in order to reduce the firing temperature and the bulk density of products, and such increase in strength, it contains c. as slag fluorosilicate slag - waste pyrohydrolysis production of hydrogen fluoride in the following ratio, wt.%: Clay 70-90 Fluorosilicate shpak - waste pyrogydrolgznogo 0 production of hydrogen fluoride 10-30 Sources of information taken into account in the examination of 5 USSR author's certificate 467862, cl. From 04 To 33/00, 1974. 2. Lundin M.G. Additives to the charge in the production of kergilic wall materials., Review information, VNIIESM. M.,: 1974 C-56-57 (prototype)