RU2232147C1 - Clay-phosphate material - Google Patents

Abstract

FIELD: building materials.

SUBSTANCE: invention can be used in making building blocks. Clay-phosphate material comprising clay, iron-containing waste in metallurgical manufacturing based on ferrous oxide Fe (II) with residue 5-7% on sieve № 008, ortho-phosphoric acid with density 1.24-1.25 g/cm³, Cambrian sky-blue clay and, additionally, open-hearth dust containing Fe (III) and Zn (II) oxides with residue 2-5% on sieve № 008 in the following ratio of components, wt.-%: Cambrian sky-blue clay, 56-57; indicated waste, 9-11; indicated open-hearth dust, 15-16; ortho-phosphoric acid with density 1.24-1.25 g/cm³, the balance. Invention provides enhancing resistance to cold of phosphate material.

EFFECT: valuable properties of material.

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Description

The invention relates to the field of building materials and can be used in the manufacture of building blocks.

Known clay phosphate materials based on clay, loam, phosphoric acid and additives - oxides of d-metals. (Svatovskaya LB, Smirnova TV, Latutova MN et al. Cementing and non-baking materials based on natural aluminosilicates. - L.: Stroyizdat, Cement magazine No. 11, 1989). The process of obtaining materials based on a natural highly dispersed product represented by clay minerals can take place according to the scheme of acid reactions - on the acid and active centers of these minerals. This process can be catalyzed by substances acting on the principle of redox catalysts. As activating additives, you can use technogenic products containing d ^6-10 elements, as well as iron-containing products.

These known phosphate materials selected as analogues harden in air and are water resistant.

The closest in technical essence and the achieved result to the claimed technical solution is selected for the prototype clay phosphate material based on loam 71-74 wt.%, Iron-containing waste of metallurgical production with a residue on sieve No. 008 5-7% containing Fe (II) 7 oxide -11 wt.% And phosphoric acid with a density of 1.24-1.25 g / cm ^{3 the} rest. Patent RU No. 2148563 C1, C 04 B 28/34, 05/10/2000, 3 pp.).

The disadvantage of these materials is the low frost resistance of the obtained phosphate materials.

The problem to which the invention is directed is to increase the frost resistance of materials based on phosphoric acid and to use open-hearth dust containing Fe (III) and Zn (II) oxides due to the formation of sparingly soluble basic aluminum phosphates.

The problem in the proposed solution is achieved by the fact that the clay-phosphate material containing clay, iron-containing waste of metallurgical production based on Fe (II) oxide with a sieve residue No. 008 of 5-7% and phosphoric acid with a density of 1.24-1.25 g / cm ³ , contains Cambrian blue clay and optionally open-hearth dust containing Fe (III) and Zn (II) oxides with a sieve residue No. 008 of 2-5% with the following component ratios, wt.%:

Clay Cambrian blue 56 ... 57

Indicated waste 9 ... 11

Indicated open-hearth dust 15 ... 16

Orthophosphoric acid

Density 1.24 ... 1.25 g / cm ³ Else

New, in comparison with the prototype, is the use of open-hearth dust containing Fe (III) and Zn (II) oxides, instead of sand, which leads to the formation of insoluble basic aluminum phosphates, which increase the frost resistance of the material.

Concrete example

A mixture consisting of Cambrian clay, iron-containing waste of metallurgical production, which is Fe (II) oxide and open-hearth dust containing Fe (III) and Zn (II) oxides, is mixed and mixed with orthophosphoric acid with a density of 1.24 ... 1.25 . The following materials are used: Cambrian (blue) semi-acid clay, low dispersed, medium ductility, bulk density - 1450 kg / m ³ ; iron-containing waste of the following basic composition, wt.%: FeO - 96; CuO - 0.1; Al ₂ O ₃ - 0.4; Mo ₃ O ₄ - 0.1; NiO - 0.2; SiO ₂ 2.0; Cr ₂ O ₃ - 0.3; C - 0.3; phosphoric acid (GOST 65-52-80), open-hearth dust (iron-containing fine powder of brown color), fractional composition: 90% of particles less than 5 microns in size, chemical composition of dust,%: SiO ₂ - 1.0; MnO - 1.0; Al ₂ O ₃ - 1.0-1.5; PbO ₂ - 2.8-6.0; Cr ₂ O ₂ - 1.0; CuO-0.7; ZnO - 12.0-16.0; NiO - 0.1; MgO - 0.8; MnO ₂ - 0.03-0.1; Fe (III) oxide - the rest.

The use of open-hearth dust containing iron (III) and zinc (II) oxides makes it possible to obtain frost-resistant material after hardening in air, which can be used in construction. Frost resistance was determined according to GOST 7025-91.

Examples of compositions and test results are presented in the table.

An analysis of the table shows that the use of open-hearth dust containing Fe (III) and Zn (II) oxides instead of sand can increase the frost resistance of the material.

Claims (1)

Clay phosphate material containing clay, iron-containing waste of metallurgical production based on Fe (II) oxide with a residue on sieve No. 008 of 5-7% and phosphoric acid with a density of 1.24-1.25 g / cm ³ , characterized in that it contains clay Cambrian blue and optionally open-hearth dust containing Fe (III) and Zn (II) oxides with a sieve residue No. 008 of 2-5% with the following ratio of components, wt.%: Clay Cambrian Blue 56-57 Specified Waste 9-11 The specified open-hearth dust 15-16 Orthophosphoric acid, density 1.24-1.25 g / cm ³ Else