SU393239A1 - REFRACTORY CONCRETE - Google Patents

Description

I

The invention relates to the production of fire-lining material, in particular, for the manufacture of replacement process equipment; used when pouring steel.

Known refractory beta, including quartz fine ground aggregate, liquid glass; additives and hardener. The disadvantage of using such concrete is the increased consumption of liquid glass, which reduces the refractory properties of concrete products.

The aim of the invention is to increase the strength, flame retardancy and heat resistance of concrete products.

This is achieved by the fact that the proposed beta contains, as a plasticizer - hardener, a solution of carbaide in the following ratio of commerce (iB wt.%):

Quartz filler of various fractions85,5-91,0

Liquid glass with a density of 1.37-1.38 g / cm and with a module of 2.4-3.07.3-10.0

Additive - ferrochrome slag 0.7-1.0

2

Urea solution

1,3 density, 0-3,5

For the manufacture of refractory concrete it is proposed to use cheap natural unbaked first slowly non-regenerable quartzites, in particular, the Ovruch deposit of various types, ny. The consumption of liquid glass (in the living component) is reduced thanks to the replacement of a new plastic hardener - carbamide CO (N142) 2. The introduction of the latter into the composition of concrete increases the resistance and heat resistance of products, and, moreover, it allows for the elastic plastic workable concrete to a lower content of liquid glass.

In the manufacture of the concrete proposed, the next number of comioents is used (per unit volume), / сг/.и;

Quartzite fractions

2.4-5.0 mm1000

Qua rcite fr shares

0.01-2.4 mm700

Fine ground quartzite (fractions

0.088 mm) 450

Liquid glass with a density of 1.37-1.38 g / cm - 200 Ferrochrome slag20

Urea

Water50

/

,one

3

Properties of the resulting concrete: Volume weight, KZJCM:

in freshly formed

condition nii2380-2400

in dried state ni22405

Compressive strength nrn

(cubes in size

50X50X50) kg / cm: after drying 298-360

heating up to 850 ° С 258-338У

after 25 air tenlosmens (heating to 850 ° С

and cooling to 20 ° C 220-296 Thermal resistance

(heating to 850 ° С .15

and cooling to

up to 20 ° C)

tensesmen Over 25

Flame retardancy, ° С1690-1730

Workability, sec 15-2020

The resulting concrete quickly and evenly verdeet, picks up a nagging condition in airborne conditions, contains a minimum amount in it, which can drastically reduce the drying time of the lining. Proposal- 25

The concrete is 3-4 times cheaper than the known ogpeunorov and it allows to mechanize the lining.

PROPOSITIONS AND RESULTS

Refractory concrete, including quartz aggregate, water glass, additive and hardener, from га ha / ots {yggs ts.m. parts (in wt.%):

Quartz zanelnitel various

fractions85,5-91,0

Liquid glass with a density of 1.37-1.38 g / sl / - and with a module 2.4-3.07.3-10.0. Additive - ferrochrome slag 0.7-1.0

A solution of carbamund. Density 1,3, 0-3,5