RU2288200C2 - Ceramic mass for producing brick - Google Patents

Abstract

FIELD: production of construction materials.

SUBSTANCE: ceramic mass comprises, in mass %, 50-80 of clay component of tailings of gravitation of zircon-ilmenite ores and 20-50 of calcium-containing slag produced during gray cast iron melting.

EFFECT: enhanced environmental protection and expanded raw material base for production of brick.

2 tbl

Description

The invention relates to the construction materials industry, mainly to the composition of the masses for ceramic bricks.

Known ceramic mass for brick of the following composition, wt.%: Loesslike loam 91-97, coal fines 1-3, water-slag slag 2-6 [1].

The disadvantage of this composition is the relatively low frost resistance of 18-26 cycles.

Closest to the invention is a ceramic mass for the manufacture of bricks, including the following components, wt.%: The clay part of the "tails" of gravity zircon-ilmenite ores (GCI) 50-80, dump overburden carbonaceous shales (OVS) 20-50 [2 ]. Adopted for the prototype.

The disadvantage of this composition of the ceramic mass is the high shrinkage of 7.8-8.5, which contributes to the deformation curvature of the brick, and water absorption of 15.2-18.8.

The aim of the invention is to reduce shrinkage and water absorption of the ceramic mass.

This goal is achieved by the fact that the well-known ceramic mass, including the clay part of the “tails” of gravity of zircon-ilmenite ores, additionally contains calcium-containing slag from smelting of gray cast iron in the following ratio of components, wt.%: Clay part of the “tails” of gravity of zircon-ilmenite ores 50 -80, calcium-containing slag from smelting of gray cast iron 20-50

Calcium-containing slag from the smelting of gray cast iron was used as a cleaning agent and flux to reduce shrinkage and water absorption. It is known that CaO, despite the high melting point, in clay-containing masses is a strong flux due to the formation of relatively low-melting compounds with Al ₂ O ₃ and SiO ₂ . Therefore, calcium-containing slag from smelting of gray cast iron is used instead of traditional expensive natural floods, such as chalk, dolomite and other calcium-containing components. The chemical composition of the components is given in table 1.

Table 1 The chemical composition of the components Components The content of components, wt.% SiO ₂ Al ₂ About ₃ Fe ₂ O ₃ CaO MgO R ₂ O P.p.p. clay part of the “tails” of gravity of zircon-ilmenite ores 58.70 23,4 6.55 1.8 1.22 1,62 7.1 calcium-containing slag from smelting of gray cast iron 32.52 19,2 1,02 39.2 6.07 1,0 table 2 The compositions of ceramic masses Components The content of components, wt.% one 2 3 four clay part of the “tails” of gravity of zircon-ilmenite ores 80 70 60 fifty calcium-containing slag from smelting of gray cast iron twenty thirty 40 fifty

The ceramic mass was prepared in a plastic way at a moisture content of 18-22%. The molded brick was dried to a residual moisture content of 5-7%. The dried brick was fired at a temperature in the range of 1000-1050 ° C. Table 2 shows the composition of ceramic masses, and in table 3 the physical and mechanical properties of ceramic bricks.

Table 3 Physico-mechanical properties of bricks Indicators Compositions Prototype one 2 3 four Shrink% 7.2 6.8 6.2 5,4 7.8-8.5 Water absorption,% 14.8 14.5 14.0 14.3 15.2-18.8

As can be seen from table 3, the introduction of calcium-containing slag from the smelting of gray iron into the compositions of ceramic masses helps to reduce shrinkage and water absorption of bricks.

The use of calcium-containing slag in the composition of ceramic masses from the smelting of gray cast iron will make it possible to obtain non-shrink with low water absorption brick from industrial wastes without the use of natural traditional raw materials.

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

Information sources

1. A.S. 1539185 USSR, MKI S 04 V 33/00. Ceramic mass for the manufacture of bricks / V.Z. Abdrakhimov. - Publ. 01/30/90, Bull. Number 4.

2. Abdrakhimov V.Z. The effect of iron-containing metallurgical slag on the physical and mechanical properties of bricks / V.Z. Abdrakhimov, M.I. Balzannikov, V.P. Dolgiy, E.S. Abdrakhimova // The Eighth Academic Readings of RAASN. Current status and development prospects of building materials science. - Samara, 2004 .-- S.12-14.

Claims (1)

Ceramic mass for brick production, including the clay part of the “tails” of gravity of zircon-ilmenite ores, characterized in that it additionally contains calcium-containing slag from smelting of gray cast iron in the following ratio of components, wt.%: The clay part of the tails of gravity of zircon-ilmenite ores 50-80 Calcium-containing slag from smelting of gray cast iron 20-50