SU891591A1 - Refractory mortar - Google Patents

Description

(54) Refractory Mortar

The invention relates to the industry of building materials and it can be used when erecting masonry from refractories of thermal units, repairing linings and furnace liners. Known refractory solution, 1 inclusive, in wt.%: Aqueous solution of sodium hexametaphosphate 14-16 Fine ground phosphorus slag. 10-14 Chamotte powder Remaining The closest in technical terms to the proposed is a blank solution (23) including, wt.% : Aluminosilicate fireclay filler 60-83 Aluminophosphate bond .15-20 Caustic or sintered magnesite 2-10 However, known refractory solutions have low adhesion strength in the temperature range 300-1200 ° C. The purpose of the invention is to increase the adhesion strength in the temperature range 300-1200 0. This goal is achieved by the fact that the refractory solution, including fireclay filler, phosphate binder and caustic magnesite, contains an aluminum-chromophosphate binder and additionally fluoride aluminum and aluminum hydroxide in the following ratio of components, weight.%: Alumochromphate 24-30 binder 0.5-1 Caustic magnesite 1-5 Fluorine.ty aluminum 9.5-14 Aluminum hydroxide Else Chamotte filler

as the chamotte filler can be used mortar chamotte fine grinding brand SHT-1 and SHT-2

PCT-1 Not less than 38 Not more than 1.6 1730 PCS-2 Not less than 33 Not standardized 1690

The use of an aluminochromophosphate binder with active addition of caustic magnesite in a volume of not more than 0.5-1 wt.% Allows to shut the solution consisting of an alhomosilicate filler and a mixture of aluminum fluoride with hydrated alumina to obtain, at a normal temperature, a suture sufficient for carrying out lining works in their initial construction.

The addition of aluminum fluoride with alumina hydrate to aluminosilicate filler in an amount of 1-5 wt.% And 9.5-14 wt.%, Respectively, allows to obtain a stable adhesive strength in the temperature range of 300-1200 ° C due to the formation of a glass phase upon melting aluminum fluoride. and reacting the aluminum-chromophosphate binder with aluminum hydroxide, resulting in the formation of its acidic phosphates.

Example 1. Lumosilicate filler — chamotte (50 wt.% 7 is thoroughly mixed with 14 wt.% Aluminum oxide hydrate previously mixed with 5 wt.% Aluminum fluoride, then 1 wt.% Of caustic magnesite is added, mixed and closed.

Chamotte filler 50

Alumochromophosphate Binder 30

8915914

GOST 6137-61, physico-chemical indicators of which are given in table. .

Table 1

30 wt.% Alumochromophosphate binder. After thorough mixing, the solution is ready for use.

Example 2. Alumosilicate filler — SHT-1 mortar (60 wt.%) Was thoroughly mixed with 11 wt.% Alumina hydrate previously mixed with 2 wt.% Aluminum fluoride, then 0.7 wt.% Caustic magnesite was added. 26.3% by weight of the aluminum-chromophosphate binder agitate and shutter. After thorough mixing, the solution is ready for use.

Example 3. Aluminosilicate filler — U1T-2 mortar (65 wt.% Thoroughly mixed with 9.5 wt.% Aluminum oxide hydrate previously mixed with 1 wt.% Aluminum fluoride, then 0.5 wt.% Caustic magnesite was added While stirring, 24% by weight of the aluminum-chromophosphate binder is mixed and shut in. After thorough mixing, the solution is ready for use.

In tab. 2 and 3 show the compositions and properties of the known and proposed refractory mortar for lining.

table 2

60

65

60

26.3 24

22

Claims (1)

Claim Refractory mortar, including chamotte filler, phosphate binder and caustic magnesite, characterized in that, in order to increase the adhesive strength at a rate of