SU979296A1 - Raw mix for producing phosphate binder - Google Patents

Description

(54) RAW MATERIAL MIXTURES FOR THE PREPARATION OF PHOSPHATE The invention relates to the production of building materials and products and can be used to make heat-resistant phosphate resident and building structures based on them. The known raw material mixture for the production of phosphate binder based on titanium dioxide 1. The disadvantage of the raw material mixture is low mechanical strength (615 kg / cm) and a high curing temperature (300 ° C). Also known is the raw material mixture for the manufacture of a phosphate binder, including titanium dioxide 78 and phosphoric acid 29 2 .. This raw material mixture is the closest to the invention in its technical nature and the result achieved. The disadvantage of the raw material mixture for the manufacture of the phosphate binder NILE is the low mechanical strength (800 kg / cm), the greater the heat treatment temperature for imparting. neither the water resistance and the hardening materials (300 C), as well as the low adhesion to metals (30 kg / cm). I The aim of the invention is to increase the water content. dignity, decrease in temperature of hardening, increase mechanical strength and increase adhesion to metals. The goal is achieved by the fact that the raw material mixture for producing phosphate in a binder, including titanium dioxide and phosphoric acid, additionally contains hydrofluoric acid in the following ratio, wt.%: concentration of 60-70% (in the formulation, the amount of phosphoric acid is indicated in terms of concentration). Titanium dioxide is used rutile modification. Example. The raw material mixture is prepared for phosphate in the slurry by stirring for 10 minutes titanium dioxide, phosphoric and hydrofluoric acids. Part of the received meme3 9792964

C is molded and heat treated. At the second part of the mixture, one day is used to glue 150 C at a rate of rise in temperature of the defatted stainless steel plates.

0.3 ° C / min. Steel that is heat treated at 150 ° C

After heat treatment, j Compositions of the raw materials and their physical resistance and compressive strength are determined. The mechanical properties are given in the table. The composition of the raw materials for the manufacture of phosphate samples based on them

and determine adhesion properties. properties and properties

300

.78

22

The invention allows increasing water resistance up to 97%, ultimate compressive strength, up to 95 MPa, adhesion up to 48 MPa with a decrease in the solidification temperature to 150 ° C.

The use of the invention allows to increase the service life of building structures.

Claims (2)

Invention Formula Raw mix to obtain phosphate in the binder, including titanium dioxide and phosphoric acid, characterized in that, in order to improve water resistance. 28 80 95 reduce the solidification temperature, increase the mechanical strength and increase adhesion to metals, it additionally contains hydrofluoric acid in the following ratio, wt.%: Titanium dioxide 72-80 Phosphoric acid 15-18 Hydrofluoric acid 5-10 Sources of information taken into account in the examination of G. Inorganic materials, 1966, Vol. 2, No. 2, p. 343-348. 2. Lime in higher education institutions Chemistry and Chemical Technology, vol. I, 1979, p. 65-67 (prototype).