SU530060A1 - The method of steelmaking - Google Patents

Description

I

ysoy - :; r; i;.; s otg / osits to the field of black metadata:;, “more specifically, to the production of stajia: burned / usa.

The method of smelting in steel is not suitable; packs, including solid filling 4eta ;; }; 11 ssl and s oxidizers, for progrugsu shgh.gu, pour liquid iron, purging ba1, .2-Е-.г with oxygen, limestone additive, refining to heat. At the same time, the donation of Hassa in grabbemo, - ichichestae is carried out by pesoBo-i it on the surface of the baths and iron. J.

The fundamentals ..: - TV-7; a healthy CChPm of such a method is T-J, which in this case is the slagging process for 1t e; :: eg, A due to a decrease in TeM durability; because of the addition of limestone, on a solid scale, which requires considerable (no heat).

Kaibapee biotech by technical content And the achieved effect is Method 3; lg: lagging in the bottom steel-smelting ketch, in which the slag pattern is Yu1c: and BBGCcEi- after pouring the cast iron continuously, i:,::; i EGO.RL The conditions of the slag are improved: - - ::, J.

However, the continuous supply of spax-forming materials complicates the organization of production and requires additional equipment.

The aim of the invention is to accelerate the slagging process, increase the durability of the furnace elements and improve the quality of the metal while simplifying the production organization.

This is achieved by the fact that according to the proposed method, the additive of the pump into the bath is carried out: the first portion 5-1 O min after casting iron into the oxygen area 4 Urm in the amount of SO-4O% of its melting rate, the second portion - at the temperature of the metal 138 O-1400 0 and raised tuyeres in the same region in the amount of 40% of its consumption for smelting, and the remaining limestone is at a metal temperature of 148–1500 ° C evenly over the entire surface of the bath.

Claims (2)

Such a solution of the problem ensures the acceleration of the slag process, because limestone fed to the zone of high temperatures quickly decomposes, and the lime formed is absorbed almost instantaneously by slag melt due to the intensive bubbling of iron oxides in the spot E. For example, a metal charge simultaneously with oxidizing dy (iron ore, scale, welding slag, etc.) is loaded into a furnace, heated to a temperature of at least 120 ° C, after which the liquid is poured and the bath is purged with oxygen. The limestone is cut in a fraction of 5 to 25 mm: the first portion is taken 5-10 minutes after the iron is poured into the area of oxygen tuyeres in an amount of 30-4% of the flow rate; the second is at a metal temperature of 1380-1400 s and raised to the tuyerema -4O%, and the remaining up to 10O% with metal tagging 148O-1500 C evenly over the entire surface of the bath. Formula of Invention Steel smelting process in a steel-making steel furnace, including solid-metal filling, a: xTaj, aajOiisKy x-chdky cast iron, oxygen bathing with sh-eksiEkost 1O - 12 m / t chaS additive is known Single and finishing smelting, characterized in that, in order to accelerate shlaks-obrezovana and increasing .kachestva metal; ::. ku and the signatuate and cuts; first; /.;,. :::. 5-10 minutes after pouring iron sj:;. Ion oxygen tuyeres in the amount of 30-40 from its consumption for smelting., the second charge.and when reaching your teracharacters .138O140O ° С to the same region in the amount of 304O% of its consumption on smelting and ostazshuk with a part - when reaching the bath of the General Service 148О-150О ° С evenly throughout the area. Sources of information accepted by BI-SJ in the examination: 1. Japanese patent & 13,852, S, S 143. 1. Japanese Patent & 138S2, 1962. 2. Avt.Sv. No. 376447, cl. C O5, O8, 71.