SU503912A1 - The method of redistribution of vanadium-containing cast iron - Google Patents

Description

(54) METHOD OF MOVING VANADIUM-CONTAINING IRONS

one

The invention relates to the field of ferrous metallurgy, and more specifically to methods for the redistribution of cast iron in converters.

There is a method of redistribution of vanadium-containing cast iron in the converter, which includes blowing the iron with a gaseous oxidizing agent and introducing into the converter magnesium-containing fluxing additives in the form of dolomitic lime. The addition of magnesium-containing materials significantly improves the quality of vanadium sclac, facilitates processing when vanadium is extracted. However, the introduction of magnesium oxides, complicates the process of redistribution of vanadium iron, slows down the process of induction of reactive slag, reduces the degree of conversion of vanadium from iron to slag.

The goal of the proposed method is to intensify the process of redistribution of vanadium-containing iron and to improve the quality of vanadium slag.

For this, it has been proposed to introduce as a mag

Calcium siderite together with iron magnesia OH dederite, calcium oxide containing materials can be added to the converter.

Before the iron is blown with an oxidizing agent, or in the process of blowing into the BFKJt converter, natural iron-magnesian siderite is pure in sulfur and phosphorus, the total amount of which must ensure the content of magnesium oxide in the final slag within the limits of 5-2O%. The introduction of iron – magnesia siderite into a converter leads to the acceleration of the formation of a fluidly moving highly reactive slag, which well forms and assimilates: in the process of blowing vanadium pentoxide. As a result, the process of cast-iron de-intensification is intensified, and the full-scale de-nomination of cast iron increases.

However, as a result of the conversion of vanadium-containing iron with iron-magnesia siderite additive, vanadium slag is formed most favorably | For vanadium composition, for example, containing about 15% vanadium pentoxide, 32% iron oxides, LO% magnesium oxide, 15% silica, the rest being manganese, calcium, chromium and titanium oxides. The phosphorus content does not exceed 0.06%. The vanadium yield from such slag according to the usual leaching schemes is about 85%. Against 55-70% of the slags without iron used in the redistribution of vanadium cast iron is magnesia siderite.

The proposed method allows for intensified || {hevat redistribution of vanadium-containing cast irons during the converter smelting process and will significantly increase the degree of vanadium extraction during the redistribution of pig iron and the subsequent chemical-metaplastic redistribution of vanadium slags.

Claims (2)

1. A method of reprocessing vanadium-containing cast iron in the jerk of j, which involves blowing the cast iron with gaseous bicarbonate and introducing in the envelope of magnesium observant flunar additives, characterized in that, in order to intensify the redistribution and increase the quality VA vanadium slag, iron-magnesia siderite is introduced as a fluxing additive. 2. The method according to claim 1, which is based on the fact that, together with iron-magnesium siderite, materials containing the calcium are introduced into the converter.