SU718389A1 - Mineral wool - Google Patents

Description

G- . The invention relates to the production of heat insulating and acoustic building materials. Known mineral fiber based on the melt from the rocks of dolomite and perlite, including components in the following amounts, wt.%:., S 0i46-60 AGGOz10-12 CaO, 11-21 MDO.8-14 RjO4-5 1. This fiber is obtained of the charge consisting only of the refractory components, in connection with which the melting during its preparation is particularly long and requires a high temperature. One of the components, perlite, is a deficient material. Due to the content of Alj03 in the amount of more than 10%, the mineral 20 of this fiber is also prickly. Mineral wool is also known, containing col- tonthents in an amount, wt.%:: You can find in the same type of SOA 41.7-45 , 5 7.2 -7.3 CaO 34.5-37.2 3.2-3.5 MDO Fez Oz 9.3-10.1 ZOZ 0.07-0.08 In view of the content of FejOs in the amount of bo9, 3 The indicated mineral wool has a distinct color, and due to its Alj03 content of more than 7%, it is barbed. Oral wool is the closest to the invention, which includes components of the following amounts, wt.%: SiO228-50 A (20z9-20 CaO21-40 MgO.5-20 ResOz0.2-6 RaO 0.2-2-5 13. This mineral wool also barbed, except oh, it is not always colorless and not always made of a low-melting resin.The purpose of the invention is to improve colorlessness.

This is achieved by the fact that the mineral wool, which is 5 O2, AljOs, CaO, MgO, FfijOa, Rj O, contains these components in the following amounts, wt.%:

SiOj; 46-54

A |, OZ 4-7

Cao. 28-41

MDO1-8

FejOs1-3

RjO2-5

Negolyuchest mineral. Cotton wool is achieved by reducing the surface tension of the melt by reducing the amount of AljOa in it and increasing the length of the melt, lowering the temperature of its crystallization by approximating the composition of the mineral wool polytectics P1elev spar - melilitkvarts - pyroxene - wollastrnite. An increase in the temperature interval for forming fibers from the melt at a reduced value of its surface tension allows half of the mineral wool, which is composed mainly of fine fibers: with a diameter of less than 7 microns, which leads to a reduction in its spikiness and additionally contributes to the elongation of mineral wool fibers. The latter creates conditions for improving the quality of its products. The approximation of the composition of the charge to the mentioned polyvistechics is also ensured by its fusibility,

as well as better melt penetration, contributing to an increase in the mechanical strength of mineral wool fibers. The colorless mineral wool is created with a low content. there are pigment oxides (less

3 wt. - traces). Mineral wool is made from a mixture made up of marl, clay, loam, limestone, dolomite, their enrichment products and other readily available natural raw materials.

alov and industrial waste. For corrections Additives of sulphate for three, magnesite and other materials can be used for the composition of solvents.

Claims (3)

In tab. 1 presents a concrete example | compositions proposed mineral wool, and in table. Figure 2 shows the amount of fiber that determines the pricklyness of a different diameter of pradlag, this mineral wool, which is obtained using a multi-roll centrifuge. , . Ta b l and d a 1 In mineral wool, taken as a prototype, fiber content with a diameter of 7 µm 47%, 7-15 µm 40-50%, 15 µm 3%. The proposed mineral wool has a reduced amount of fibers with a diameter of 7 microns and a diameter of 15 microns, which results in its non-chipping. Besides. In addition, the composition of mineral wool ensures the preservation of its colorlessness. The invention of the mineral wool, including SiO2, AljOs, CaO, MgO, RaO, is about the fact that, in order to reduce pricklyness and preserve colorlessness, it contains these components in the following quantities, wt.%: SiOj.46-54 AljOj4-7 CaO28-41 MgO1-8, Re Oz1-3 RjO2-5 Sources of information taken into account during the examination 1.Avtorskoe certificate of the USSR N 455072, cl. From 03 to 13/00, 1971. 2. USSR author's certificate N 579247, cl. From 03 to 13/00, 1974. 3. Authors certificate of the USSR, № 391072, cl. From 03 to 37/00, 1971.