SU912716A1 - Composition for filling joints in masonry of oxygen converter lining - Google Patents

Description

(5) COMPOSITION FOR FILLING SEAMS OVAGON CONVERTER LAYING

I

 FIELD: composition. You need to fill the joints of the masonry lining of the oxygen converters to make steel.

The known refractory binder material SI for lining high-temperature aggregates, contents, wt.%; 30-58; periclase liquid glass 20-30; thermite additive 1.5-2.5, which includes Crc03 2i AI 16 and InOj 6.

The disadvantage of the known material is the low resistance of the lining coating, due to the presence of liquid glass and a small amount of thermite additive in it.

The purpose of the invention is to increase the durability of the lining by increasing the wear resistance of its seams.

The goal is achieved by using aluminum as a thermite additive to magnesite powder.

Your powder and mill scale in the following ratio of components, weight .:

Magnesite Powder52-60, Aluminum Powder8-12 Rolled Scale 32-38 The injected aluminum powder and mill scale, interacting with each other in the process of heating the lining, produce enough heat to ensure that the grains of the magnesite powder are sintering with each other and magnesite chrome with a white brick. account of the alumina thus formed. ,

The quantitative limits of the injected aluminum powder are limited by the release of the required amount of heat to form a sufficient amount of alumina (at least 8%) and the possibility of melting the refractory mass (more than 12%)

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Quantitative limits of the injected composition of mill scale, wt.,

mill scale (32-38 wt.%) SiOj2.8; CaO 0.05; MgO 0.05;

limited respectively to the required-FeO 67,16; , 23; A150 traces, given oxygen for pro p 0.01; S 0.02.

The flow of alumina-5 oxidation reactions. The dispersity of the powders used and a decrease in the refractoriness of the zakov, which are part of the thermal expansion of iron oxides, is shown in Table 1. The components are mechanically mixed and the mixture is poured into the gaps between the bricks when laying the new converter. When the lining is heated, the mixture ignites. Magnesite grain 20

60

eight .

Table I

32 Strong sintering with a brick is firmly sintering among themselves and with magnesito-chromite kiopich. Table 2 shows specific compounds of exothermic mixtures and sintering of their sulphates. table 2

Claims (1)

Claim Composition for filling the joints of the masonry of the lining of an oxygen converter made of magnesite-chromite brick, containing magnesite powder and a thermite additive, with the aim of increasing the durability of the lining by increasing the wear resistance of its joints, as a termite additives use aluminum powder and mill scale in the following ratio, wt.?: Magnesite Powder 40 Aluminum Powder 8-12 Mill scale 32-33