SU767059A1 - Raw mixture for producing heat-insulating articles - Google Patents

Description

one

The invention relates to the field of building materials and is intended for the production of thermal insulation products. . five

Famous cellular concrete mixture for the production of cellular concrete, including,%: 35-67 phosphate binder, 30-62 ash - ablation, 0.1-0.2 aluminum powder, 1-3 used Q engine oil 3

However, this mixture has a low heat resistance and a low deformation temperature under load.

Closest to the proposed 15 raw mix, for the manufacture of heat-resistant cellular concrete, including,%; 35-55 phosphate binder, 35-55 technical alkoxy oxide, 6-12 alumina hydrate, 0.1- 20.45 alumina powder, 0.2-0.9 mineral oil 2.

The disadvantages of this mixture are low temperature resistance, and the viability of the mixture prior to heat treatment, the relatively low deformation temperature under load, and complex manufacturing techniques.

The purpose of the invention - increase ter | stability, deformation under load- 30

This increases the viability of the mixture before heat treatment and simplifies the technology for making the mixture.

This is achieved by the fact that the raw mix, including phosphate binder, technical alumina, aluminum powder filler, additive and water, contains finely ground refractory clay as a filler, and as an additive casein fractions 0.315 mm in the following ratio of components, wt.%

Phosphate binder 30-50 Technical oxide gigaomini 22-28

Aluminum powder 0,5-1 Mill refractory clay 22-28 Casein fraction

 0.315 mm1.5-3Water Else

 . -.,

The introduction of casein as an additive makes it possible to evenly distribute small amounts of the gas former over the entire concrete mix, which contributes to the formation of an ordered and finely porous structure that predetermines the low thermal conductivity of concrete at high temperatures. The most important thing in the invention is the ability to regulate the gas generation time when introducing casein, namely, a fraction of less than 0.315 m having a specific surface area sufficient for planning aluminum powder particles and thereby significantly increasing the fitness of the prepared mixture prior to heat treatment. The introduction of casein into the raw material mixture during the heat treatment of products at temperatures of 300 ° C and above the formation of microcracks, evenly distributed throughout the volume and not interconnected. During thermal and mechanical shocks, cracks in the material encounter existing crack fractures, as a result of which p & destructive forces are diverted to the side, distributed over a large volume, and decay. All this contributes to improving heat resistance. Introduction to the composition of the mass of fine refractory clay in combination with casein significantly increases the overall heat resistance of the insulation material of the material, increases its crack resistance during operation, direct heat fluctuations, and allows the proposed mixture to be used as a heat insulating coatingWe ttpH Extremely hard temperature regimes . The viability of the initial mixture being prepared is increased due to the fact that the refractory clay and casein introduced into the composition perform in the form of slides the role of cladding additives. Finely dispersed clay, capable of producing stable colloidal plants, in combination with casein forms a thin and sufficiently dense pattern on the psevronity of aluminum, preventing its interaction with acidic phosphates and acid. The viability of the mixture in this case with a normal Noah urine reaches several days. The deformation of the material under load / derivative of the strength of the structure and nature of the intermolecular bond material from the proposed mixture is higher compared with the analogs considered. Thus, the main crystalline phase of the cementitious composition in the proposed mixture is orthophosphate alumina, and in the known composition aluminum metaphosphate, characterized by a lower temperature, is determined by a lower temperature of 1 ° C under load. To a large extent, the reduction of deformation under load is also facilitated by higher corrosion at the temperature of the resulting liquid phase in the new material, which helps the directional solidification of the material. The use of pre-fabricated alumina greatly simplifies the technology of manufacturing the proposed mixture, since it does not require additional grinding for a long time (up to 12 hours), which allows refusing complex grinding equipment and significantly reduces energy consumption in the manufacture of thermal insulation products. According to preliminary estimates, the economic effect of using the created material on the LDF lines of the Saratov Industrial Glass Plant will be about 350 thousand rubles. savings, and will save about 3% of fuel consumed. Example 1. A 1.5% casein fraction less than 0.315 mm is thoroughly mixed with 0.5% aluminum powder. Then, 23.5% of finely ground refractory clays are mixed with 23.5% of the technical mixture of aluminum, then 45% of the phosphate binder is diluted with 6.0% of water. Then ciiiecb finely ground refractory clay with technical aluminum oxide is thoroughly mixed with a mixture of casein fraction less than 0.315 mm and aluminum powder. Next, the mixture of dry components is thoroughly mixed with the phosphate binder solution. The finished mixture is placed in a mold and heat treated. Example 2. 1.0% aluminum powder is thoroughly mixed with 3% casein fraction less than 0.315 mm. Then 24% of fine ground refractory clay is mixed with 27% of technical alumina, then 35% of the phosphate binder is dispersed with 10% of water. Then a mixture of casein fraction less than 0.315 mm with aluminum powder is mixed with a mixture of ground refractory clay and technical alumina. The mixture of dry components is then thoroughly mixed with the phosphate binder solution. The finished mixture is placed in the forums and heat treated. Example 3. 2% casein fraction less than 0.315 mm is thoroughly mixed with 0.5% aluminum powder. Then, 25% technical aluminum oxide is mixed with 22% finely ground refractory clay. Next, 46% of the phosphate binder is diluted with 4.5% water. Then a mixture of casein fraction less than 0.315 mm. with alcmine powder is mixed with a mixture of technical mixture of alknium and refractory clay. The mixture of dry components is thoroughly mixed with the phosphate binder solution. , Tobotno the mixture is placed in a mold and heat treated.

The table shows the characteristics of the insulating material made from raw mixtures of the three compositions.

Casein fraction,

less than 0.315 mm

Refractory clay

Technical

alumina

/

Phosphate Binder

Aluminum powder Water

Casein fraction, less than 0.315 mm

Refractory clay

Alumina technical

Phosphate binder.

Aluminum powder Water

Casein fraction, less than 0.315 mm

Grind fire; persistent

Alumina technical

phosphate bond

Aluminum powder Water

The use of the proposed raw material mixture makes it possible to significantly increase the service life of the external heat insulation of furnaces for roasting kerns and other products 1.5–2 times, working at the temperature

1300

24

1340

12

44

35

1320

M to. In addition, the use of effective heat flow can improve the productivity of the burrs, reduce the cost of production, resulting in

45 profitability of production. preference formula Raw mix for the manufacture of thermal insulation products, including phosphate binder, technical aluminum oxide, aluminum powder, filler, additive and water, due to the fact that, in order to increase heat resistance, deformation under load , increasing the "weariness of the mixture to heat-treatable and simplifying its technology, it contains fine refractory clay as a filler, and as an additive casein a fraction of 0.315 mm at the next component ratio, wt.%, 8 Phosphate binder 30-50 pecifications alumina 22-28 Aluminum 0.5-1 mill ground powder AGN euporna glina22-28 Casein fractions m1 0.315 1 / 5-3 Voda.Ostalnoe Information Sources, n Tide into account in the examination 1. Copyright certificate USSR 50361, cl. From 04 To 15/02, 4 To 29/02, 1974. 2. AUTO USSR certificate 12194, cl. From 04 To 29/02, 1976.

Claims (1)

Claim The raw material mixture for the manufacture of heat-insulating products, including phosphate binder, technical aluminum oxide, aluminum powder, filler, additive and water, characterized in that, in order to increase heat resistance, deformations under load, increase the viability of the mixture before heat treatment and simplify the technology for its manufacture, it contains fine ground refractory clay as a filler and casein fraction 40.315 mm as an additive in the following ratio of components, wt.% Phosphate Binder 30-50 Technical alumina 22-28 Aluminum powder 0.5-1 Fine refractory clay 22-28 - Casein fraction ^e 4 0.315 mm. 1 / 5-3 Water Else