SU724479A1 - Refractory mass - Google Patents

Description

one

The invention relates to the refractory industry, ferrous and non-ferrous metallurgy, and can be used in the production of refractory masses for washing stoppers.

A known refractory mass comprising the components, weight,%; Chromite ore66-70

Refractory clay (bentonite) 10-12

Binder (sulphite liquor, water glass) 10-12 Ground asbestos 9-11. However, this mass has insufficient slag resistance (corrosion of 31.4% of the volume, depth of impregnation 19 mm) and the temperature of the onset of deformation (),

The closest solution to the proposed one is a mass of 2, containing, wt.%:

Chromite 57,8-69,2

Zirconia 22-30

Electrocorundum 8-12

Dispersed aluminum 0, 2-0,8.

However, this mass has inherent flaws: erosion - 33.5% of the volume, the depth of impregnation is 17 mm, the temperature of the onset of deformation under a load of 2 kgf / cm -1260 C.

The purpose of the present invention is to increase the slag resistance and the temperature at which the coating begins to deform.

0

According to the goal, the refractory mass additionally contains graphite, and as a binder there is a fire resistant varnish with the following ratio of the indicated components, wt%:

five

Khromitov.a ore60-75

Zirconium 5-10

Graphite15t.20

Fire resistant varnish 5-10.

It is advisable to introduce zirconium

0 in the paste mass, which contributes to increasing the mass uniformity and reducing dust emission during its processing.

The introduction of zirconium increases the temperature of the onset of deformation of the refractory, the introduction of graphite increases its slakostoykost, heat resistance,

Fireproof lacquer is used as a tie, which gives

0 mass plasticity, does not fade to

the appearance of the liquid phase in the mass, which contributes to the preservation of its strength, adhesion to the brick lining, without further reducing the fire-resistant properties of the mass,

The compositions of the mass are shown in table 1

Table 1

- iJii: ;; S 4 --f; - the g-mass is prepared in the technological order, received dL of granular masses, processed in the laboratory

runner mixer with a cycle that ensures uniformity. Samples are compressed on a laboratory hydraulic press at a specific pressure of 400 kgf / cm. The filtered samples are dried under equal conditions in a laboratory oven at 120 ° C for 24 hours. - 2, 70

10 2.77 2.76

i. g- ..-- . , .., n -,. j, v.fe..i r - 4-rf-iiSiViy4. ". lijV.

 Table 2 shows that the proposed mass has a much more low slag erosion, the temperature of the onset of deformation under load, the advantages of the proposed refractory mass are as follows. that drawing it on a funnel magnesite glass, aluminosilicate; stopper stopper and stopper tubes allow you to remove sticking to the glass, sticking the stopper to the stopper, which reduces the breakage of the stopper (spill without stopper) / corroding the stopper tube, and therefore reduces metal losses, reduces the consumption of molds and profitable extensions, reduces scrap when preparing the stoppers, it allows to keep the funnel of one hundred and three feet of its first use; The application of the proposed refractory mass to the lining of the steel outlet chute helps to preserve the fire. The apparent density of the dried samples is determined in accordance with the requirements of GOST 2405-67, thermal resistance according to GOST 7875-56, 20 deformation temperature under load /; determined by the crucible method.

25 Properties of samples are presented in, tabl: 2.

table 2

resistant lining of the latter from impregnation with metal and slag, and, consequently, increases its durability; Slag on the lining of the steel-teeming ladle, made of products From the proposed mass, does not build up and does not erode the slag.

Claims (2)

1. A refractory mass, comprising chromic ore, zirconium and a bond, characterized in that, with a purpose; increasing the slag resistance and the temperature of the onset of deformation, it additionally contains graphite, and in quality. - a fire-resistant varnish at a ratio of components, weight, IT Chromite ore 60-75 Zirconium. 5-10. Fireproof lacquer 5-10 Graphite 15-20 "according to claim 1, of which there are" I LJe Sources of information taken into account in the examination No. i. USSR author's certificate 351810, cl. From 04 To 35/12, 1970. 2. USSR author's certificate 532590, cl. From 04 To 35/12, 1975.