RU2333898C2 - Ceramic mass for brick production - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of ceramic materials, mainly to compositions of masses for brick production. Ceramic mass for brick production includes medium-plastic, easily-melted clay and wastes of procession of hard salt aluminium-containing slags, which contain in weight %: Al - 3-4; Al₂O₃ - 7-8; NaCl - 3-4; KCl - 1-2; Na₂CO₃ - 18-19; (NH₄)₂CO₃ - 12-13; H₂O - 0,9-1,0; SiO₂ - 44-45; CaCO₃ - 2-3; MgCO₃ - 0,9-1,0, with the following ratio of components, weight %: medium-plastic easily-melted clay 85-95; mentioned wastes - 5-15.

EFFECT: reduction of ceramic mass density.

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Description

The invention relates to the industry of ceramic materials, mainly to compositions of the masses to obtain a brick.

The ceramic mass for producing bricks of the following composition is known, wt.%: Clay part of the “tails” of gravity of zircon-ilmenite ores - 20-70, ash TPP - 30-80 / Abdrakhimov DV Ceramic brick from industrial wastes / D.V. Abdrakhimov, E.S. Abdrakhimova, V.Z. Abdrakhimov. // Construction Materials. - 1999. - No. 9. - C 34-35 / [1].

The disadvantage of this composition is the relatively high density (1380-1900 kg / cm ³ ).

Closest to the invention is a ceramic mass for the manufacture of acid-resistant materials, comprising the following components, wt.%: Moderately ductile loam - 50-80, ash and slag waste from power plants with a combustible substance content of more than 35% - 10-25, medium ductile low-melting clay - 10-25 / A.S. 1766876 SU, IPC С04В 33/00. Ceramic mass for the manufacture of bricks / V.Z. Abdrakhimov, Yu.M. Makrushin, Ch.Z. Orazaev, K.T. Turkstan. - Publ. 10/07/92, Bull. No. 37 / [2]. Adopted for the prototype.

The disadvantage of this composition of the ceramic mass is a relatively high density.

The technical result of the invention is to reduce the density of bricks.

The specified technical result is achieved by the fact that in the well-known ceramic mass, including medium-plastic low-melting clay, waste from processing of solid salt aluminum-containing slags is additionally introduced in the following ratio of components, wt.%:

medium plastic fusible clay 85-95; solid aluminum waste slag processing waste 5-15.

In the production of aluminum, solid salt slags are formed with Al ₂ O ₃ - 41-42 and Al metal - 9-11%. After processing solid salt slag in the Altek furnace and extracting aluminum, waste products from processing solid salt slag of the following composition are formed, wt.%: Al - 3-4; Al ₂ O ₃ - 7-8; NaCl - 3-4; KCl - 1-2; Na ₂ CO ₃ - 18-19; (NH ₄ ) ₂ CO ₃ - 12-13; H ₂ O - 0.9-1.0; SiO ₂ - 44-45; CaCO ₃ - 2-3; MgCO ₃ - 0.9-1.0. The decomposition temperature of the waste from processing solid salt aluminum-containing slags (800-850 ° C) makes it possible to obtain a heat-insulating porous (lightweight) brick with porosity up to 35-45% when introduced into the ceramic mass.

Information confirming the possibility of carrying out the invention. The ceramic mass was prepared in a plastic way at a moisture content of 20-24%, from which the brick was molded, raw brick was dried to a moisture content of not more than 8% and then fired at a temperature of 1050 ° C. Table 1 shows the composition of ceramic masses, and in table 2 - physico-mechanical properties of bricks.

Table 1 The compositions of ceramic masses Components The content of components, wt.% one 2 3 medium plastic fusible clay 95 90 85 solid aluminum waste slag processing waste 5 10 fifteen

Table 2 Physico-mechanical properties of bricks Indicators Compositions Prototype one 2 3 Density, kg / m ³ 1150 1040 950 1450-1300 Frost resistance cycles 79 68 57 55-81 Mechanical compressive strength, MPa 25.8 20,2 17.8 -

As can be seen from table 2, the bricks of the proposed compositions have a lower density than that of the prototype.

The resulting technical solution when using the waste from processing solid salt aluminum-containing slag can significantly reduce the density of bricks.

The use of technogenic raw materials in the production of bricks contributes to the utilization of industrial waste, environmental protection and the expansion of the raw material base for ceramic materials.

Information sources

1. Abdrakhimov D.V. Ceramic brick from industrial wastes / D.V. Abdrakhimov, E.S. Abdrakhimova, V.Z. Abdrakhimov. // Construction Materials. - 1999. - No. 9. - C 34-35.

2. A.S. 1766876 SU, IPC С04В 33/00. Ceramic mass for the manufacture of bricks / V.Z. Abdrakhimov, Yu.M. Makrushin, Ch.Z. Orazaev, K.T. Turkstan. - Publ. 10/07/92, Bull. Number 37.

Claims (1)

Ceramic mass for the manufacture of bricks, including medium-plastic fusible clay, characterized in that it further comprises waste processing of solid salt aluminum-containing slag containing, wt.%: Al - 3-4; Al ₂ O ₃ - 7-8; NaCl - 3-4; KCl - 1-2; Na ₂ CO ₃ - 18-19; (NH ₄ ) ₂ CO ₃ - 12-13; H ₂ O - 0.9-1.0; SiO ₂ - 44-45; CaCO ₃ - 2-3; MgCO ₃ - 0.9-1.0, in the following ratio of components, wt.%: medium plastic fusible clay 85-95 specified waste 5-15