SU1477695A1 - Initial composition for manufacturing mineral wool - Google Patents

Abstract

The invention relates to the production of thermal insulation building materials from silicate melts. In order to expand the raw material base while simultaneously increasing the water resistance and temperature resistance of the mineral fiber, the charge for its manufacture contains, in wt.%: Plagioclase 30-50

pyroxene 15-25

quartz 5-15

3-5 rutile

magnetite 4-7

volcanic glass 5-15

horn snag 8-13. The mineral fiber from the mixture of the above composition has a modulus of acidity of 2.92–5.20, water resistance (PH) 1.9–2.9, temperature resistance 830–950 ° C, fiber diameter 4–6 μm. The temperature of the fluid state of the melt is 1280-1350 ° C, the temperature of processing the melt into fiber is 1320-1380 ° C. 3 tab.

Description

The invention relates to the production of thermal insulation building materials from silicate melts.

The purpose of the invention is to expand the raw material base while simultaneously increasing the water resistance and temperature resistance of the mineral fiber.

To prepare the melt, a mixture based on rocks containing the minerals of plagioclase, pyroxene, quartz, as well as magnetite, rutile, volcanic glass and hornblende, is used in a certain ratio.

The preparation of the melt is carried out as follows.

The chemical and mineralogical composition of the charge components is preliminarily determined. According to the results of the analysis establish the ratio between the components of the mixture. The removed constituents of the charge after mixing are loaded into the melting unit. As a melting unit can be used baths, electric, electric gas furnaces and cupola. The fusible minerals of the charge components already at 1200 ° C form a glass phase, which is an accelerator of the process of melting the charge with a high modulus of acidity. Melt processing into fiber is carried out, for example, by multi-roll centrifuges.

Specific examples are given in table. one.

In the melting process, a homogeneous homogeneous melt is obtained, which

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due to the presence in the charge of the minera & fishing, the most easily forming glass. These minerals include plagioclase and volcanic glass. Quartz, pyroxenes and other materials begin to dissolve in glass formed as a result of the melting of plagioclase and volcanic glass, therefore the degree of homogeneity and homogeneity of the melt depends on the ratio of fusible components (plagioclase and volcanic glass) and refractory (pyroxene and quartz) in the mixture.

In tab. 2 shows the chemical composition of the final product - mineral fiber obtained from melts with a normalized mineralogical composition, and table. 3 - mineral fiber properties.

Melting temperature of the mineral fiber: softening temperature of 1180-1200 ° C; temperature of the fluid state 1280-1350 ° C; melt processing temperature in the fiber 1320-1380 ° C; diameter of the obtained fiber 4-6 microns.

The method for producing a melt makes it possible to create such composite mixtures, the use of which until now was considered unacceptable because of the high modulus of acidity of the mixture. The proposed blend allows the raw material to be expanded.

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base for the production of mineral wool, reduce the consumption of raw materials per unit of production due to the exclusion of carbonate additives, and hence the loss on ignition, therefore, the melt yield per ton of charge increases. At the same time, mineral wool is distinguished by its high performance properties due to its high water resistance and due to its high modulus of acidity. These indicators of mineral wool contribute to an increase in its service life.

Claims (1)

Invention Formula The mixture for the manufacture of mineral fiber, including plagioclase, pyroxene, quartz and rutile, is characterized in that, in order to expand the raw material base while simultaneously increasing water resistance and temperature resistance, it also contains magnetite, volcanic glass and hornblende in the following ratio of components % by weight: Plagioclase 30-50 Pyroxen15-25 Quartz5-15 Rutile 3-5 Magnetite4-7 Volcanic glass5-15 Horn snag8-13 40 20 50 15 30 25 Table 1 ten ten eleven 15 15 13