SU1428740A1 - Charge for making facing tiles - Google Patents

Abstract

This invention relates to a process for the production of ceramic facing tiles. In order to increase the heat resistance, the charge includes the following components, wt.%: Low-melt clay 50-75, associated products of chromium ore extraction based on anhydrous magnesium silicates 25-50. Physicomechanical indicators are as follows: fire shrinkage 2.9-3.78%, water absorption 14.4-15.5%, heat resistance 6-8 cycles, flexural strength 21.5-22.3 MPa. 2 tab.

Description

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The invention relates to the building materials industry, namely to the composition of ceramic masses for the production of tiles for the interior lining of building walls.

The goal of the invention is to increase heat resistance.

In the blend composition, use is made of chromium-containing ore rocks, which have the following chemical composition, wt%: SiO 34.12-36.9; AljOj 0.00-1.33; TiOi 0.00-0.1; FeO 0.0-3.16; FejO, 4.62-8.03; CaO 0.6-1.78; MgO 38.64-41.49; 0.0-0.05; MnO 0.00-0.08; 0.00-0.32; 0.00 0.21; SO, 0.00-0.24, n.n.h. 12.54-14.79. According to the mineralogical composition, they consist of 80% olivine (Mg, Fe), j - anhydrous magnesium silicate, 5-8% chrome-spinelide, 10-12% serpentinite Mgg (OH) g, and talc and britite

The products are made in accordance with the production technology of building ceramics using slip method.

The slurry is a stable suspension with a moisture content of 35-80%. Associated products are previously subjected to coarse and medium crushing. Then in a ball mill load raw materials, water and electrolytes. The moisture content of the finished slip is 45–50%, the flow rate is 13–15 s, the residue on sieve No. 0063 is no more than 3%. Prepare the slip and pour it into the agitators and serve it to the cymitna tower for drying.

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The obtained powder is moistened to 6-7% sieved through boron no. 1-N025 and left for 1 day. Pressing is carried out on a working press in two steps: primary pressure 2.5-3 MPa, secondary pressure 10 MPa. The melting roasting temperature was 1040–1070 ° C; the roasting time was 30 minutes. The glaze was applied by watering. The glaze humidity is 38–40%, the glaze consumption per tile is 22–25 g, and the glaze density is 1.63 g / cm. The temperature of the poured roasting is 930–950 ° C, the roasting time is 25 min.

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Table 1 shows the compositions

for the manufacture of tiles, in table 2 - physical and mechanical properties of products from the proposed and known charge.

Claims (1)

Invention Formula The mixture for the manufacture of facing tiles, including low-melting clay and an additive, characterized in that, in order to improve heat resistance, it contains as an additive associated products of extraction of chromite ores based on anhydrous magnesium silicates in the following ratio, wt.%: Clay fusible 50-75 Associated Products mining of chromite ores based on anhydrous magnesium silicates 25-50 I Table 1 75 70 60 50 25 30 40 50 - Diopside 55 25 10 ten  , 6 7.86 8.62 .3.78 3.6 14.414,7 eight 21.522.0 1428740 Table 2 7.4 6 2,90,8-2,0 15.5 6-7,5 -7 3-4 21,935-42