UA145399U - ALUMINUM-CONTAINING BRIQUETT FOR TREATMENT OF METALLURGICAL MELTS - Google Patents

Abstract

Aluminum-containing briquette for processing metallurgical melts consists of the following main elements, wt. %: Al 9-19 Al2O3 40-76 impurities other, with a moisture content of not more than 4%, and have a compressive strength of not less than 40 kgf / mm2.

Description

The useful model belongs to the field of ferrous metallurgy, namely to the production of steel.

For the deoxidation of slag in steel production, various aluminum-containing materials are used, such as aluminum slag, briquettes made of steel and aluminum shavings, and complex aluminum-containing briquettes made of fractionated powdered ferroalloys and ligatures.

Ukrainian patent No. 39089 can serve as an analogue for the claimed useful model as "composite deoxidizer of steel in the form of a briquette containing chips of aluminum-containing material and steel chips, which is distinguished by the fact that the deoxidizer additionally contains soda and carbon material in a ratio of 10:1 ,2, with the following ratio of components, mass 9o: shavings of aluminum-containing material 15-45 steel shavings 45-80 soda and carbon material 5-10.

The main disadvantage of the analogue is the contamination and moisture of the raw material (chips) for the production of briquettes.

At the moment, fluorspar or a method of selecting the chemical composition of slag, in which it has the necessary fluidity, is used to dilute slag in steel production.

At the same time, the use of fluorspar has a negative effect, because it leads to intensive wear of the lining.

As the closest analog of a useful model, which is taken as a prototype, there is an additive material according to the patent of Ukraine Mo 61111, containing aluminum and/or its alloys, in the form of a briquette of a given standard size and density for processing liquid metal and slag, which is distinguished by the fact that it additionally contains as slag-forming aluminous materials (Ag2Oz), with the following ratios of ingredients, wt. Pho:

AI 20-98

Ag Oz 2-80

The rest of her.

The useful model is based on the task of deoxidizing and rarefaction of slag (without the use of fluorspar) with aluminum-containing briquettes with a minimal but sufficient aluminum content.

In the production of briquettes, raw materials are used, including the slags of remelting of aluminum scraps, which contain up to 20 95 aluminum, by presses with an effort that ensures obtaining a compressive strength of at least 40 kgf/mm, which reduces material losses (reduces shedding) during transportation. and overloads on conveyor belts to bunkers.

The task is solved, that aluminum-containing briquettes for processing metallurgical melts consist of the following main elements, wt. Pho:

AI 9-19

Ag Oz 40-76 other impurities;

Z with a moisture content of no more than 4 95, and have a compressive strength of at least 40 kgf/mm.

Distinctive features from the analogue are the aluminum content in the briquette, the moisture content of no more than 4 95 and the compressive strength of at least 40 kgf/mm". When briquettes are introduced into the melt with a moisture content of more than 4 95, slag and metal are released from the metallurgical equipment.

Effectiveness of new aluminum-containing briquettes with the content of A1I-15 95, AI2Oz3-65 95 at a compressive strength of 55 kgf/mm? tested for processing steel in the converter at their consumption of 2.0 kg/t, when the metal is deoxidized by 0.23 kg/t (ОЙ me) and slag 0.13 kg/t (GeО) or with a residual aluminum content of 0.011 95 ГАЙЙ me.

Claims (1)

USEFUL MODEL FORMULA 40 Aluminum-containing briquette for processing metallurgical melts is characterized by the fact that it consists of the following main elements, wt. Pho: AI 9-19 Ag Oz 40-76 other impurities, with a moisture content of no more than 4 95, and have a compressive strength of at least 40 kgf/mm".