SU927777A1 - Binder composition - Google Patents

Description

one

The invention relates to building materials and can be used in the manufacture of refractory pieces, concrete, mortars.

It is known to be a mist containing a metal powder and a solution of orthophosphoric acid tl.

Its disadvantage is high porosity, toxicity.

The closest to the present is a 23, including alumina-phosphate bond 38-V2-,. alumina, high alumina cement 21-25; chromium oxide 9

.13.

However, the wafer is characterized by shrinkage and insufficient retention of the technological properties of the mass.

The purpose of the invention is to increase the strength when heated, the viability of the mass and the elimination of shrinkage.

The goal is achieved by staking, including: a phosphate binder.

OXIDE aluminum and accumulator contains sodium polyphosphate, alumina and corundum of fraction 0, RPM mm in the phosphate binder binder, magnesite or caustic magnesite and chromoma -neite 0, OBZ mm in the following components ratio, weight .: Sodium polyphosphate 10-28 Oxide aluminum Zb- 5

ten

fractions iO, RPZ mm Magnesite or caustic magnesite and chromomagnesite of a fraction of 0.063 mm.

IS The introduction of finely dispersed aluminum oxides and Mai in the composition of the mixture to a fraction less than 0.063 mm leads to the formation of direct bonds between the components with the formation of a high-strength 20 crystalline structure stable throughout the entire high temperature range. Sodium polyphosphate in an amount of 10-28% provides complete

3 9277774

the chemical reaction between AI Oj, corundum (up to 98.5 AUO J, and

composed components. With this magnesium oxide - magnesite (MoOd90%)

long-term preservation of chromomagnesite (MgO 65-67% Cr O Yutechnological properties of mass 20%), caustic magnesite (MgO to

Tested compounds in which in ka-5 88%). "

the raw materials of the alumina oxide compound are given in

mini serve alumina (up to 98.5%. Table 1.

Table 1

Aluminum oxide fr. Less than 0,063 mm

in the form of alumina

Aluminum oxide fr. Less than 0,063 mm in the form of corundum

Magnesium oxide, fr. Less than 0, mm mm

in the form of magnesite

Magnesium oxide, fr. Less than 0, mm mm

The test results are given in t abl. 2

From the obtained data it follows that the proposed in possession has 5

"five

advantages over the well-known increased strength when heated, increased safety periods of the technological properties of the mass, no shrinkage.

Claims (2)

TABLE 2 59277 Formula of the Invention A suspension, including a phosphate binder, alumina and a filler, that is, s. That, in order to increase heating strength and viability of the mass and eliminate shrinkage, it contains as a phosphate binder sodium polyphosphate, oxide aluminum fraction О, .063 mm, and as a filler - magnesite or caustic magnesite and chromomagnesite of a fraction of 0.063 mm in the following ratio of components, weightD: 15 76 nesting and chromomagnesite of the fraction О, OBZ36- 5 Sources of information taken into account during the examination 1. USSR author's certificate № 337359 кл. S O B 15/00, 1972. 2. USSR author's certificate number cl. C O B 35/18, 1970 (prototype).