SU1178737A1 - Refractory compound - Google Patents

Description

The invention relates to compositions of refractory masses used for the lining of thermal units, mainly heating wells,

The purpose of the invention is to increase the bending strength, abrasion resistance, resistance to the effects of welding slag and carbon monoxide.

The used screenings from the crushing of a used-for-use spinel refractory-spinel refractory crush is a large-tonnage waste of a refractory plant and is located in dumps.

Refractory clay has a fineness of 15 grinding 0-0.5 mm.

Plasticized liquid glass obtained by introducing into sodium liquid glass according to GOST 13078-87 density of 1.36 g / cm ² plasticizer form-20 mules C _p H _{2n + 1} C £ H ₄ 5O ₃ Eeyore,

where η = 10-12.

The manufacturing technology of the proposed refractory mass does not change compared with the known, 25

In tab. 1, shows the compositions of refractory masses, in table. 2 - properties of refractory concretes of these masses.

The proposed refractory mass has the following advantages compared with the known. Bending strength after heat treatment at a temperature of application (1400 + 50 ° С) of refractory concretes made from the proposed refractory mass is 2.6-3.3 times higher, durability when exposed to welding slags and carbon monoxide is greater in 3-4 and 1 , 5-2 times than from the known refractory mass. The abrasion resistance of refractory concretes from the proposed refractory mass is 2935% higher. In addition, an important environmental problem is being solved - the land area occupied by the dropout dumps from the crushing of a battle of magnesian-spinel refractories is reduced.

The economic effect from the application of the proposed refractory mass is 42.3-43.7 rubles. per 1 ton of mass.

Table 1

The ratio of components, wt.%

Screening from crushing Fireproof Liquid glass Ferrochrome battlefield magnesia clay plasticizing slag spinel fire bath stops that were in operation

four

7

0.5

1 88.5

82.25

10.5

1.25

8 14

3 76

2

table 2

Composition Strength after heat treatment at application temperature (1400-50 ° С), MPa Abrasion mm Persistence at impact welding slags Resistance to carbon monoxide (mass loss), % ΔΡ, % Δν, % bending under compression one 9.8 32.0 4.51 34.0 14.1 0.06 2 12.0 38.0 4.39 19.1 12.0 0.05 3 11.6 36.0 4.60 · 41.2 15.7 0.09

Claims (1)

Refractory mass for lining thermal units, mainly heating wells, including chromium-magnesite: component, refractory clay, bundle, calcium-containing hardener, which is characterized by the fact that, in order to increase bending strength, abrasion resistance, durability to the effects of welding slags and carbon. oxide, it contains as a chromium-magnesite component the screenings from the crushing of the battle of magnesial-spinel refractories, used, composition, wt.%: Cr ₂ O ₃ 45-50 Mg0 20-27 Αΐ, Ο- 5-13 δίθ ₂ 4-7 Cao 0.2-0.8 Her ₂ 0 ₃ 12-16, and as a bundle - plasticized liquid glass containing the plasticizer of the formula ^ п ^ 2п + 1 С, Н ₄ ЗО ₃ Na, where η = 10-12 in the amount of 0.05-0.15% by weight, and as a calcium-containing hardener - ferrochrome slag in the following ratio, wt.%: Refractory clay Plasticized liquid glass Ferrochrome slag Elimination from the crushing of the battlefield used magnesialspinelide refractories eat (ABOUT Moreover, the latter has the following fractional composition, May.%: 3.0-2.0 mm 2 2.0-ΐ, Ο mm 9-15 1.0-0.5 mm 3-5 0.5-0.2 mm 40-, 54 0.2-0.1 mm 10-14 Less than 0.1 mm 21-27 4-8 7-14 0.5-2 Rest Memory „„ P78737 1 1178737