SU1488280A1 - Initial composition for making construction bricks - Google Patents

Description

The invention relates to the production of ceramic building bricks. In order to increase the strength and heat of formation, reduce the sensitivity to drying, air and general shrinkage, the raw mix contains the following components, wt%: loam 5–40; granulated slag of electrothermophosphorus production 55-94; Sulfur coal production waste - Sulfur dust 1 - 5. Physical and mechanical indicators are as follows: coefficient of sensitivity to drying 0,280,37; air shrinkage 0%; total shrinkage 0,22—0,38%; the heat of formation is 91.71–143.62 kJ / mol, the tensile strength at a yield of 19.1–23.2 MPa, the tensile strength at bending 7.3–8.9 MPa. 6 tab.

The chemical composition of the raw materials are given in table. four.

Products made by the following technology. Phosphoric slag and loam is ground in a laboratory ball mill before passing through a 0.315 sieve. The waste production of sulfouglu used without grinding. Then the components are weighed in the right quantities and dry. After that, water is added to the dry mixture in an amount of 8-10% by weight of the dry components and stirred until a moist homogeneous mass is obtained.

Bricks (250x120x65 mm) are molded from the resulting mixture, samples are cubes (5χ5χ X5 cm) by pressing. The pressing pressure of 15-20 MPa. The products are dried in an oven at 60 --- 100 ^s C for 3-4 hours. Roasting is performed at 1000 and 1050 ° C with an exposure of 3 hours. The resulting products have a white color, clear edges and a smooth surface.

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The compositions of the proposed mixture are given in table. five.

Physical and mechanical properties of products are given in table. 6

Claims (1)

Claim Raw mix for the manufacture of building bricks, including loam and granulated slag of electrothermophosphorus production, characterized in that, in order to increase strength, heat ten formation, reducing the coefficient of sensitivity to drying, air and general shrinkage, it contains an additional waste of production of sulfo-coal - sulfo-coal 5 dust in the following ratio, wt.%: Loam 5-40 Granulated slag of electrothermophosphorus production 55—94 Sulfur production waste — sulfo-coal dust 1–5 Table! The diameter of the sieve holes mm 2.5 1.25 .0,63 0.315 0.14 Less than 0.14 The residue on the sieve,% - - 5.2 35.15 25.25 34.4 table 2 Waste Humidity, % Ash content, A,% The output is volatile, in, ν ^Γ , 7, Sulfur content, LODC,% Calorific ability, kcal / kg Temperature characteristics of ash, ° С Start deformations Start softening Start melting Sulfo-coal dust 10.8 18.6 '32.6 4.9 3800 1250 1270 1300 Table3 Table ^ Raw material Chemical composition, wt.% to ίο .. A1 _g 0 ₃ Cao m _e 0 ’· ° Ί R | 50 ₃ Ia _g 0 + K _g 0 ppt Granulated phosphoric slag 41.0 5.70 46.02 2.06 0.14 1.76 1.12 0.6 0.67 0.92 Loam 52.0 15.37 11.7 4.94 4.4 - 0.25 8.14 3.2 Production waste sulfo coal Y, 2 h, h - - - - C (carbon) 85.5 1488280 6 five Table 5 mixture Raw material Component content, May. 71, in the composition Offer hugee Granular phosphoric slag 94 83 72 66 55 Loam five 15 25 thirty 40 Sulfur production waste - sulfo-carbon dust 1.0 2.0 3.0 4.0 5.0 Known Loam 58 64 70 - - Slag electrothermophosphorus production 50 34.5 29 Salt of alkaline earth metal orthophosphoric acid 2.0 1.5 1.0 T but b ln c a 6 Composition Coefficient R Shrinkage,% Heat is about Limit strength, MPa, sensitivity to drying aerial fire common 'P skZ схη shpiya _? kJ / mol compression P}. 1Ί bend Offer the guy one 0.28 0 0.22 0.22 -91.71 19.1 7.3 2 0.32 0 0.26 0.26 -120.86 20.1 8.1 3 0.34 0 0.28 0.28 -143.62 21.4 8.4 four 0.35 0 0.31 0.31 -137.48 21.9 8.7 five 0.37 0 0.38 0.38 -98.64 23.2 8.9 Known ny 1.2-1.4 2.9-3.4 1.7-2.0 4.6- (-22.7> 5.4 ¢ -31.36) 7.9-10.3 1.1-1.4