SU455072A1 - Mineral fiber - Google Patents

Description

The invention relates to the production of mineral wool and can be used in the construction industry;

Known mineral fibers on the basis of the melt including from the rocks, including SiOs, AOOz, Cao, MgO "K2O.

The aim of the invention is to test a colorless mineral fiber with improved physicomechanical properties.

This is achieved by the fact that the mineral fiber contains these components in the following amounts, wt.%:

SiOs

49-60 10-12

ABOZ 11-21

Cao

MgO 8-14 -K2O 4-5

NasO To obtain the specified mineral fiber composition, w-ichtu containing 50-70% perlite and 30-50% carbonate rocks is used.

The chemical composition of this shih.khty following, weight. %:

SiOa 49-60, ALOz 10-12, RegOz to 1, CaO 11-21, MgO 8-14, CgO (Na2O + K2O) 4-5, SOa less than 1. At the same time, the modulus of acid is not less than 1.7. Oxides of the alkaline group (Ka20 + - {- CsO), the content of which in the charge is 4-5%.

its melting is up to, and the temperature of the flowable state of the rasilav is up to 1300-1350 ° C. On the other hand, oxides of the alkaline group, which are surfactants, are concentrated in the noBepxHOCTiioM melt layer, which reduces the coefficient of its surface oxidation to 370-390 dyn / cm at 1300 ° С. Due to this, the content of non-fibrous inclusions in the mineral fiber does not exceed 12%, and its melt content during fiber processing is reduced by an average of 50% regardless of its processing.

The mineral fiber obtained from the mixture of the proposed chemical composition of the centrifugal melt processing method is characterized by a content of 8–12% peat-fiber-like inclusions, a fiber thickness of 4–5 microns, and also white color due to the low content of iron oxides (less than 1 %) and on the practical m. the absence of margarite oxide. The temperature of inelastic deformation (temperature resistance) of mineral wool is 680-730 ° C, the strength of the fibers is 30-35% higher than the strength of the fibers from the melt of blast-furnace slags with corrective additives.

The high content of glass-forming oxides (Si02 and A12Oz) causes novjejeHHvio elspluatatsionuyu resistance of mineral fibers.

In tab. 1 and 2, examples of the composition of the mineral and volcanic mineral properties described are presented.

Subject and reference of the clause

Multiple voloyan on the basis of melt from rocks, including SiOj, A12Oz,

Table 1

CaO, MgO, and CaO, characterized in that, in order to obtain a colorless mineral fiber with enhanced physical and mechanical properties, it contains these components in the following amounts, wt. %:

SiOa49-60

AljOa10-12

CaO11-21

8-14

NaaO + KaO

4-5

Ta6.111 by 2

54.24 10.07 0.78 17.88 12.16 4.34 0.53 2.14 52.11 P, 32 0.61 18.05 13.24 4.21 0.46 2.02 50JO 10 , 34 0.76 19.65 14.02 3.02 0.51 1.81

730

4.67

Dolomite

30 70

70.0

10.7 perlite

Dolomite 4.32

73.0

11.8 70-

32 perlite

72.0 11.4

Dolol IT 68.3 4.54

perlite