SU1278340A1 - Refractory packing stuffing - Google Patents

Abstract

The invention relates to refractory, can be used in the metallurgical and engineering industry for lining thermal units and improves the slag resistance of refractory ramming mass based on quartz sand. The mass contains the following components, wt%: refractory clay 5-10; liquid glass 6-10; zircon 5, 2-9,8; sodium silicofluoride 0.8-1.2; quartz sand - the rest. 2 tab. (L

Description

00 with

The invention relates to refractory masses and can be used in the metallurgical and engineering construction, for example, for lining arc furnaces,

The aim of the invention is to increase the gloss resistance.

The mass is made as follows.

Sand is poured into runners, then clay is added and the mixture is stirred for 2-3 minutes until the clay is evenly distributed to the sand. Zirconium orthosilicate and sodium silicofluoride are then added. I mix for 5-7 minutes to obtain a mixture of uniform color, then add liquid glass and mix until the material is obtained, with the necessary plasticity.

The compositions of the masses are given in table. one.

Table 1

0.94

4.4

0.5

0.1

0.2

After cooling, the crucibles are inspected. To determine the amount of impregnation of the mass with molten slag, the crucibles are cut in half. The crucibles of compositions 1 and 3, in places of contact with the molten slag, were soaked from the sides by 0.5-1.0 cm, and from the bottom side - by 0.5 cm. The crucible of composition 2 was soaked from the sides by 0.3-0.5 cm , and from the side-bottom - by 0.3 cm. The structure of compositions 1-3 after testing is not broken, there are no cracks.

Physico-mechanical properties of the lining of the proposed refractory mass are given in table. 2

table 2

Fireproof

10 10 | Clay. five

Liquid glass 6

9.8

5.2 9 0.8 1.0 1.2

83 74

69

Slag resistance tests were carried out in crucibles with an outer diameter of 50 mm, an internal 25 mm, and a height of 30 mm.

The tests are carried out as follows.

Slag is loaded and placed

in the oven for 4 hours at 1540 ° С. For testing, slag of the following composition is used,%:

SiOi34,2

,, 21,0

1.9

FeO12,9

CaO12,6

Heat resistance 1400 ° С - water 11

13

Fire resistance

Ohr

1650 1670 1680

Porosity,% 24 24 24

Density, g / cm

90,100

110

25

25

25

Claims (1)

Invention Formula Refractory padded mass, including quartz sand, refractory clay and water glass, about t and t ay. So that, in order to increase slag resistance, it additionally contains zircon and sodium silicofluoride in the following ratio of components, wt.%: 3 Refractory clay5.0-10 Liquid glass6-10 Zircon, 5.2-9.8 12783404 Cream-fluoride sodium 0.8-1.2 Quartz sand Else