Raw mixture for production of wall ceramic items. RU patent 2520321.

IPC classes for russian patent Raw mixture for production of wall ceramic items. RU patent 2520321. (RU 2520321):

C04B35/16 - based on silicates other than clay

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The invention is pertaining to the field of construction industry, in particular, to production raw materials mixture for production of wall ceramic products. The technical result of the invention is an increased frost resistance of the products at reduction of a shrinkage and temperatures of the material roasting. The raw materials mixture contains (in mass %): microsilica of production of crystalline silicon - 30.43-31.82, a fly ash from incineration of brown coals - 56.52-59.09 and a prorash from bucking of the spent carbon lining of electrolytic baths - 9.09-13.04.

Raw mixture for making wall ceramic article / 2269500
Invention proposes a raw mixture and composites for making wall ceramic articles. Proposed raw mixture for making wall ceramic articles comprises as raw components microsilica from manufacture of crystalline silicon, fly ash after combustion of brown coals, spills after crushing the depleted coal fettling of electrolyzers and detergent "Taiga" taken in the following ratio of components, wt.-%: microsilica, 30.4-31.0; fly ash, 56,3-57.5; spills after crushing the depleted coal fettling of electrolyzers, 8.8-9.0, and detergent "Taiga", 2.7-4.3. Invention provides enhancing strength and resistance to cold, decreasing shrinkage and the roasting point.

Method of manufacturing products based on silica-containing binder / 2283818
Invention relates to manufacture of a variety of different-destination building products such as bricks, wall blocks, footway materials, face wall and floor tiles as well as various heat-insulation and structural heat-insulation units like slabs, blocks, shells, and segments showing elevated strength and heat-insulation characteristics based on silica-containing binder using non-expensive mineral raw material and production wastes. Method involves preparing silica-containing binder with density 1.1-2.1 g/cc from mixture composed of inorganic bonding material, silica-containing component, and water under vigorous stirring in high-speed mixer at stirring speed 1500-2500 rpm, stirred particle vibration frequency2000-35000 Hz, and heating to 80-90°C followed by cooling at stirring with speed 40-100 rpm for 10-12 h to 15-25°C. Preparation of molding blend is accomplished by blending 9.0-13.5% of silica-containing binder with silica-containing aggregate, homogenizing the blend, and heat treatment of molded products at 400-950°C. When combustible aggregates are used heat treatment is carried out at 90°C.

FIELD: construction.

SUBSTANCE: raw mixture contains the following, wt %: ferroalloy production gas cleaning dust 68.0-66.7; carbonated clay loam 29.1-28.6; carbon lining crushing spill 2.9-4.7. Cold resistance comprises 75 cycles.

EFFECT: increasing cold resistance at reduction of average density and thermal conductivity.

2 tbl

The invention relates to the production of building materials and may be used for the manufacture of ceramic wall products.

The closest to the present invention to the technical nature and effect is achieved is raw mix, including in mass.%: fly ash 56,52-59,09; fume 30,43-31,82; spillage from crushing the spent carbon pot lining of 9.09-13,04 [RF Patent №2268866 SV 35/16, SW 35/14].

The disadvantage of the composition is that wall materials made on its basis, have relatively low rates of frost resistance and high values of average density and thermal conductivity.

The technical result - increase frost resistance at reduction of density and heat conductivity.

This technical result is achieved by the feed mixture contains as siliceous component of the dust-gas purification of Ferroalloy production, as a component aluminosilicate - zakarbonizovanny loam and spillage from crushing waste coal lining electrolyzers in the following ratio of components, mass%:

dust-gas purification of Ferroalloy production

68,0-66,7

zakarbonizovanny loam

29,1-28,6

spillage from crushing coal lining

2,9-4,7

Dust-gas purification of Ferroalloy production is dispersed waste with a specific surface area of 25 to 34 m 2 /g and the content of amorphous silicon oxide to 75,14 Mac. %. The chemical composition of the dust-gas purification of Ferroalloy production (wt.%): SiO 2 br70.63-75,14; Fe 2 O 3 1,76-1,78; MgO 1,77-2,44; Na 2 O 0,94-1,15; K 2 O 1,33-3,25; Al 2 O 3 1,09-1,43; Cao 0,54-062; SPT 9,82-is 11.39.

Zakarbonizovanny loam Anesbingo field contains (wt.%): NaCl - 95,2; CA 2+ - 0,58, Mg 2+ - 0,044, K + - 0,084 and

S O 4 2 -

1,45. Loam is to moderate the plastic raw material with low sensitivity to the drying.

Spillage from crushing the spent carbon pot lining is a large waste of manufacture of aluminium produced during capital repair of cells. Bulk density of the waste - 750 kg/m 3 , the predominant particle size up to 1 mm

The chemical composition of spillage from crushing the spent carbon pot lining (wt.%): With - 53,31; Na - 11,76; - 2,52; Al - 5,93; Sa - 0,15; F Of $ 11.97; Mg - 0,18; Fe 2 O 3 - 0,36; SiO 2 - 1,07; Al 2 O 3 - 17,04; CaF 2 - 0,05.

The combination of dust-gas purification of Ferroalloy production, zakarbonizovannogo loam and spillages from crushing the spent carbon pot lining promotes the formation of durable crystalline phases and rational porous structure of the material.

Example. For the preparation of the raw mix use of dust-gas purification of Ferroalloy production, zakarbonizovanny loam, spillage from crushing coal lining.

The process of preparation of the mixture includes the following operations.

Loam is then ground to a particle size of 1 mm or less.

The dry ingredients are thoroughly mixed, then moisturize to 19%by weight, while pelleting mixtures on a plate granulator.

From the obtained granulated raw mixture is formed into products by the method of moist pressing at specific pressure 20 MPa.

Then the semi-product is dried at a temperature of 100-110 C to constant mass and burn at a temperature of 900°N

Examples of composition, physical-mechanical properties of baked products are given in table 1 and table 2.

Table 1

Components

The content of the ingredients in

1 2 3

Dust-gas purification of Ferroalloy production

68,0 67,3 66,7

Zakarbonizovanny loam

29,1 28,8 28,6

Spillage from crushing the spent carbon pot lining

2,9 3,9 4,7 Table 2

Indicator

Composition

Prototype

1 2 3

Firing temperature

900 900 900 900

Compressive strength, MPa

17,5 14,2 12,5

22,6-28,7

Average density, kg/m 3

1350 1340 1330

1550-1560

Calculated thermal conductivity, W/m °

0,589 0,585 0,579

0,696-0,702

Water absorption, wt. %

27 26,0 24,7

22,4-24,3

Coefficient softening

1,3 1,25 1,2

0,86-0,91

Frost resistance, cycle