SU1284973A1 - Composition for manufacturing refractory articles - Google Patents

Abstract

The invention relates to the industrial construction materials and can be used in the manufacture of refractory products and linings for metallurgical foams, ladles and other units operating at high temperatures. The aim of the invention is to increase the strength at lObb-nOO C, slag and metal resistance. The composition for the manufacture of refractory products contains sodium liquid glass 2-4%, fine cupola slag 3-5%, finely dispersed aluminum secondary melting slag 3-5%, and quartz fine aggregate the rest. 2 tab. to (L

Description

eleven

The invention relates to the construction materials industry and can be used for the manufacture of refractory products and linings for metallurgical furnaces, housings and other units operating at high temperatures.

The aim of the invention is to increase the strength at 1000-1300 ° C, slag and meta-strength.

The following components are used in the process:

Sodium liquid glass with a density of 1.36-1.37 g / cm 3c silicate module 3-3.2,

Slags have the composition specified in Table I,

 Table

32,28-43,21 Footprints - O

3.10-11.72 1.6-3.28

27.02-35.6 1.16-2.24

Tracks 10,71-12,5

, 2-0,85

0.01-0.7 6.08-12.34

5.72-10.9

0.05-0.3

Rest

Rest

849732

Samples are prepared by the following technology. The crystalline quartzite fraction of 3-0.1 mm in the amount of .63- 67% is moistened with an aqueous solution of liquid glass, mixed and a finely ground mixture (fraction less than 0.09 mm, specific surface area not less than 3000) of quartzite, cupola slag and secondary slag is added. remelting aluminum in the amount of 33–37%. The ground mixture is prepared by joint grinding in a tube mill. The moisture content of the mass is 5%. The products are pressed at a pressure of 50–70 MPa, maintained in natural conditions for 24–30 h, then dried at 100–150 0,

five

fO

Samples of 40x40x40 mm are cut out to determine metaplo- and slag-2Q of bone margins. In the samples, a hole is drilled with a diameter of 15 mm and a depth of 18-20 mm, and slag or iron chips are poured there. The samples prepared in this way are burned at 1450 ° C dp of slag resistance and 1550 ° C for metal resistance in a reducing environment and holding at a maximum temperature of 4 hours. After testing yj, the sample is cut and the depth of refractory is determined by the formula - depth of corroded | Ni, mm; S is the area of fret, m; P - the perimeter of the hole at the contact with the slag; 1 - holding time at a given temperature.

The strength at temperature is determined on samples with a diameter of 36 mm 40 and a height of 50 mm according to the UkrNIIO method,

The compositions and properties of the samples are given in table., 2,

table 2

92 89. 86 75 90 60

7.5 3

ten

7.5 3

ten

fine slag recycled aluminum

sodium liquid glass (J 1, 37 g / s

aluminum powder (PAK-2)

ferrochrome

carbamide slag coating (J 1.3 g / cm

,

15

15

sixteen

II

0.086 0.082 0.098 0.25 0.18 0.58 0.43 0.41 0.49 1.13 0.98 2.62

12.2 Disconnection

Compressive strength at, MPa

23 25

Claims (1)

Claims The composition for the manufacture of refractory products, including sodium liquid glass, fine cupola slag, fine aluminum-containing component and quartzite fine aggregate, is characterized in that, in order to increase the strength at 1000-1300 C, slag and meta-resistance. as aluminum containing component, secondary remelting slag alu VNIIPI Order 7554/26 Random polygons pr-tie, Uzhgorod, st. Design, And Continued table. 2 ten 15 7.5 15 sixteen II 12.2 cm thickening 28 ten eleven || the following ratio, wt.%: Sodium liquid glass Fine cupola cup slag Fine secondary slag aluminum melting Quartzite fine aggregate Circulation 588 Subscription