SU952816A1 - Batch for making refractory material - Google Patents

Description

The invention relates to the manufacture of refractory material and can be used for the manufacture of refractory heat insulating linings, rotary kilns and rotary kilns with rotary hearths.

The known charge for the manufacture of refractory material based on vitrified quartzite, clay and phosphate binder fl.

The disadvantage of this mixture is the low temperature of use, since at temperature l as a result of intensive cristobalization of quartz glass contaminated during its preparation, there is a loss of thermal durability of the material.

The charge based on dinas bo and aluminum-chromophosphate binder is known, taken in an amount of 5 to 20 Bec.

The disadvantage of this mixture is low heat resistance.

The closest technical solution to the invention is the charge for the manufacture of refractory material, including the following components, wt.%:

Vitrified Quartzite

fractions 6-0.09 mm 58-68 fractions less than 0.09 mm 15-20 5 sodium hexametaphosphate 5-12

Portland cement 1.7-4.7 WaterEther

The vitrified quartzite has the following phase composition, wt.%: Q Cristalite 5-15

Glass 85-90

Quartz Else

The disadvantage of this mixture is low heat resistance and apparent density.

The purpose of the invention is to increase the density and heat resistance.

This goal is achieved by the fact that the charge for the manufacture of refractory material, including quartz glass fractions of 6-0.08 mm and less than 0.08 mm and a phosphate binder, as a phosphate binder, is aluminum chromophosphate and additionally

25 technical alumina with a specific surface area of 6000-7000 in the following ratio of components, wt.%;

Quartz glass

fraction 6-0.08 mm 32-50

30 fractions less than 0.08 mm 18-23

Aluminum Chromium Phosphate

binder

Technical alumina

with specific surface

6000-7000 cMVr

The introduction of technical alumina in the proposed recipe percentage is unnecessary due to a significant increase in thermal expansion of the material, which leads to cracking and reducing its service life. ,

The use in the charge of quartz glass of various fractions in combination with finely ground technical alumina / and aluminum-phosphate binder makes it possible to create a non-shrinking frame of refractory heat-insulating products, which are grain-forming.

Specific examples of the composition of the mixture for the manufacture of refractory material are given in Table 1.

Mixtures of these compounds are thoroughly mixed and laid in a formwork, followed by compaction. The molded elements are heat treated at 200-25 ° C for 2 hours.

The tests of the basic physicomechanical characteristics of the material proposed and known are given in table. 2

As can be seen from the table. 2, the material made from the proposed mixture has a higher density and heat resistance than the material from the known mixture.

Table 1

Ground quartz glass

fractions 6-0.08 mm fractions 0.08 mm

Technical alumina with a specific surface of 6000-7000 cMVr

Aluminum Chromium Phosphate

binder

Claims (1)

Invention Formula  The mixture for the manufacture of refractory material, including quartz-60th glass fractions of 6-0.08 mm and less than 0.08 mm and a phosphate binder, which is, in order to increase the density and heat resistance, as a phosphate 65 40 20 50 18 16 16 20 20 the binder contains aluminum-chromophosphate and additionally technical alumina with a specific surface area of 6000-7000 cm Vi in the following ratio of components, wt.% 5 Quartz glass fraction 6-0.08 mm 32-50 fraction less than 0.08 mm 18-23 5 .952816 - 6 Aluminum-phosphate 1. USSR author's certificate binding 16-25W 507545, cl. From 04 To 29/02, 1973. Technical alumina2. USSR author's certificate with a specific surface area of 489745, cl. From 04 to 35/68, 1974. 6000-7000 16-203. USSR author's certificate Sources of information - 660963, c.-C 04 B 29/02, 1977 taken into account in the examination (prototype).