CZ330796A3

CZ330796A3 - Process of utilization iron oxides in metal-bearing bulky products when producing steel, particularly within a converter

Info

Publication number: CZ330796A3
Application number: CZ963307A
Authority: CZ
Inventors: Pavel Ing. Raška; Jiří Ing. Slováček
Original assignee: Vítkovice, A. S.
Priority date: 1996-11-11
Filing date: 1996-11-11
Publication date: 1998-07-15

Abstract

Kovonosný produkt, upravený do kusového stavu se při výrobě oceli přisazuje současně s kovovým odpadem, případně na kovový odpad, do konventoru.Metal-bearing product, modified to lump The state of the steel is attached simultaneously with metal waste, or metal waste waste, to the convent.

Description

the metallurgical process of producing the steel in the oxygenation of the converter by utilizing the oxides of the iron from the metal on the non-solid waste products for the purpose of producing etruscans, including recovering the oxides bound iron in the scrap metal during the manufacturing process.

Background Art

Metal products ... wastes, especially non-metallic based oxides of metal with a number of iron oxides, such as medium-grain and coarse-grained scales, oxldloke converter sludges are produced in metallurgical industries and are currently deposited in landfills or used as pčxsada pěl the treatment of ore blast furnace charge, i.

Oxygen converter method for the production of steel with lower oxygen content or predominantly lower oxygen content Characterized by cinemas, Cast iron oxidation of accompanying elements in iron

Depending on the affinity of the oxygen element, and therefore iron oxides, the initial oxygen content, that is, up to 40% of the total blowing time is not in such an excess that in the concurrently forming string phase it is in the optimum concentration, particularly the iron oxide component, which significantly affects the physico-chemical properties of the primary slag. The current primary, erosion, and sander is made up of products of silicon oxides, calcium, z.l. and other, where the content of the component kv <: I i in x. ,,, y κ y .... ..i. 11 ... i, 1.1 < u ž ejez ri and ι; ·, .¾ t .., nje ri ..,? , xf 10 * h'utnoslnii: h · psiáí v Príroru 5 * h «nnstn < nh. crayfish slags are non-flowing, so dry and metallurgically inactive, especially for ...... melts. The iron oxide in the slag is influenced by its viscosity. the solubility of d, l of lime, thereby reducing the activity of the calcium oxide component for the desired metallurgical reaction and for the chemical bonding of the process oxldic acidic products.

SUMMARY OF THE INVENTION

The above drawbacks are eliminated by the method of using iron oxides from metal-bearing products in steel production, especially in the converter, the principle of which is that the metal-bearing product adapted to the lump is added simultaneously with the metal waste or the metal waste to the converter. It is an object of the present invention that the addition of a metal-bearing product increases the content of iron oxides, in particular the iron oxide component, to 5% by weight in the initial slag. At an optimum ratio of silicon, calcium and iron oxides, slag viscosity is reduced so that it becomes liquefied and increases its activity for the metallurgical process. This makes it possible to increase the solubility of the blown lime and thus the effectiveness of the phosphorous melt. Increased slag flowability will allow reduction of ejection from the converter and formation of slag build-up, which in liquid form will limit production. The increased content of iron oxides in the slag caused by the addition of metal-bearing products is completely reduced by the carbon dissolved in the pig iron during the carbon reaction, i.e. after 30% of the total blowing time. In this way, the iron bound in the metal scrap as the oxide is recovered into the melt. An exemplary embodiment of the invention

For a more detailed explanation of the use of iron oxides according to the invention, an example is given to the use of metal-bearing scrap in the lower oxygen scavenging converter using a briquette containing 80% by weight iron oxides. The charge of the converter was supplemented with liquid pig iron and oxygen blowing started.

Initial. the slag during silicon oxidation contained 22% by weight and was visually liquid. The composition of the end slag during the tapping process containing 11% by weight of iron oxide showed an effective reduction of iron oxides which were attached to the converter by the addition of metal bearing briquettes. 2

Amount. the additives depend on the chemical composition of the scrap metal and the proportion of metal bearing dpi and in the charge capable of composing. The amount of iron oxide additive in the form of metal scrap depends on the chemical composition of the pig iron, that is, the pig iron accompanying elements that need to be oxidized and transferred to the slag phase. 3

Claims

METHODS OF APPLICATION The use of iron oxides from metal-bearing non-metallic products in steelmaking. the name in the converter, characterized in that the metal-bearing product adapted to the piece is attached simultaneously with the metal waste, e.g. and cl on a metal tip. a cl d o 5 _v :: > ru. I njMd j i JAIOINISVIA, 0Η3Λ0 SAIAI ^ dd avy and i!

6 .IX T L ο § § a j T 0 of 7, 8 I 'í'2' saw'- '' 4