RU2387614C1 - Ceramic mass for production of acid-resistant ware - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: ceramic mass for production of acid-resistant ware includes clayey part of zircon-ilmenite ores gravitation tails, recrement overburden of gold ore deposit and aluminous-chromite wastes of aluminium alloys etching with the content of the following components, wt %: SiO₂ - 8.3; Al₂O₃ - 72.4; Cr₂O₃ - 11.2; Fe₂O₃ - 1.5; MgO - 0.7; R₂O - 17.8; SO₃ -1, at the following ratio of components, wt %: clayey part of zircon-ilmenite ores gravitation tails - 50-70, recrement overburden of gold ore deposit - 10-20; aluminous-chromite wastes of aluminium alloys etching - 20-30.

EFFECT: improved mechanical bending strength, frost resistance, heat resistance and acid resistance of items.

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Description

The invention relates to the industry of ceramic materials, mainly to compositions of the masses to obtain a ceramic acid-resistant material.

A ceramic mass is known for producing acid refractories of the following composition, wt.%: The clay part of the “tails” of gravity of zircon-ilmenite ores - 50-70, the “tails” of the beneficiation of polymetallic ores - 10-20, chamotte - 20-30 (Pat.11976. Republic Kazakhstan, IPC С04В 33/00 Ceramic mass for the manufacture of acid-resistant materials / E.S. Abdrakhimova. - Publish. 16.09.02, Bull. No. 9) [1].

The disadvantage of this composition is the relatively low heat resistance (7-9 heat transfer).

Closest to the invention is a ceramic mass for the production of acid-resistant materials, comprising the following components, wt.%:

the clay part of the tails of gravity of zircon-ilmenite ores is 50-70, the tails of the beneficiation of polymetallic ores are 10-20, silica fume from the production of ferrosilicon and ferroalloys is 20-30 (Pat.2250884 Russian Federation, IPC С04В 33/00. Ceramic mass for acid-proofing. / E.S. Abdrakhimova, V.Z. Abdrakhimov. - Published on April 27, 2005, Bull. No. 3) [2]. Adopted for the prototype.

The disadvantage of this composition of the ceramic mass is the relatively low bending strength, acid resistance and heat resistance of acid-resistant materials.

The technical result of the invention is to increase the bending strength, acid resistance and heat resistance of acid-resistant materials.

The specified technical result is achieved by the fact that in the well-known ceramic mass, including the clay part of the “tails” of gravity of zircon-ilmenite ores and dump overburden of the gold ore deposit, aluminum-chromium waste from etching aluminum alloys is additionally introduced in the following ratio, wt.%:

clay part of the “tails” of gravity of zircon-ilmenite ores 50-70 gold overburden overburden 10-20 aluminum-chromium waste etching aluminum alloys wt.%: SiO ₂ -8,3; Al ₂ O ₃ - 72.4; Cr ₂ O ₃ - 11.2; Fe ₂ O ₃ - 1.5; MgO - 0.7; R ₂ O - 17.8; SO ₃ - 1 20-30

Aluminum-chromium waste from the etching of aluminum alloys is formed during the processing of aluminum alloys in metallurgical plants. From spent pickling solutions, a precipitate precipitates, which concentrates on the bottom of the bath and gradually crystallizes. The sludge of this group, as can be seen from Table 1, is characterized by a high content of Al ₂ O ₃ and can, under certain conditions, become a substitute for natural pyrophyllite, bauxite, and other aluminum-containing components in the production of acid-resistant materials.

Table 1 Chemical composition of aluminum chromium waste Component The content of oxides, wt.% SiO ₂ Al ₂ O ₃ Cr ₂ O ₃ MgO Fe ₂ O ₃ R ₂ O SO ₃ aluminum-chromium waste etching aluminum alloys 8.3 72,4 11,2 0.7 1,5 17.8 one

Information confirming the possibility of carrying out the invention. The ceramic mass was prepared in a plastic way at a humidity of 20-24%, from which square tiles of the PK-1 type were molded, which were dried to a residual moisture content of not more than 5% and then fired at a temperature of 1250 ° C. Table 2 shows the composition of ceramic masses, and in table 3 - physical and mechanical properties of bricks.

table 2 The compositions of ceramic masses Components The content of components, wt.% one 2 3 clay part of the “tails” of gravity of zircon-ilmenite ores 70 60 fifty gold overburden overburden 10 fifteen twenty aluminum-chromium waste etching aluminum alloys twenty 25 thirty

Table 3 Physicomechanical indicators of acid resistance Indicators Compositions Prototype one 2 3 Mechanical bending strength, MPa 97 99 101 75-95 Heat resistance, heat exchange 9 eleven fourteen 3-8 Acid resistance,% 98.3 98.6 99.1 97.2-97.8

As can be seen from table 3, the acid resistant of the proposed compositions have a higher mechanical strength in bending, heat resistance and acid resistance than the prototype.

The resulting technical solution when using aluminum-chromium waste etching aluminum alloys allows to increase the mechanical bending strength, heat resistance and acid resistance

The use of technogenic raw materials in the production of acid-resistant materials without the use of natural traditional raw materials contributes to the utilization of industrial waste, environmental protection and the expansion of the raw material base for ceramic materials.

Information sources

1. Pat. 11976 Republic of Kazakhstan, IPC С04В 33/00. Ceramic mass for the manufacture of acid refractories. / E.S. Abdrakhimova. - Publ. 09/16/02. Bull. No. 9.

2. Pat. 2250884 Russian Federation, IPC С04В 33/00. Ceramic mass for acid resistance. / E.S. Abdrakhimova, V.Z. Abdrakhimov. - Publ. 04/27/2005, Bull. Number 3.

Claims (1)

Ceramic mass for producing acid-resistant materials, including the clay part of the “tails” of gravity of zircon-ilmenite ores and dump overburden of the gold ore deposit, characterized in that it additionally contains aluminum-chromium waste etching aluminum alloys with a content, wt.%: SiO ₂ 8.3; Al ₂ O ₃ 72.4; Cr ₂ O ₃ 11.2; Fe ₂ O ₃ 1,5; MgO 0.7; R ₂ O 17.8; SO ₃ 1 in the following ratio of components, wt.%:
clay part of the “tails” gravity of zircon-ilmenite ores 50-70 gold overburden overburden 10-20 aluminum-chromium waste etching aluminum alloys 20-30.