SU1370148A1 - Method of smelting steel in bottom steelmaking sets - Google Patents

Abstract

This invention relates to ferrous metals. The purpose of the invention is to increase productivity by accelerating the dissolution of lime. When steel is smelted in an open-hearth furnace, during the period of refining, a mixture of slag of electric remelting and production waste of secondary aluminum is introduced in a ratio of 1: (1.1-1.4) in the amount of 1.5-3.0 kg / t, after which 5 - Sit down lime for 10 minutes. Acceleration of lime dissolution is achieved by preliminary preparation of the furnace slag by introducing a mixture of electroslag remelting and waste from the production of secondary aluminum, which reduces the viscosity and melting point of the furnace slag and reduces the duration of the refining period, which leads to an increase in the productivity of the unit. 1 tab. (L

Description

with

NU

CX)

113

The invention relates to the field of metallurgy, and more specifically to methods for the production of steel in the bottom steelmaking aggregates.

The purpose of the invention is to increase productivity by accelerating the dissolution of lime.

According to the method, during the period of the suspension, the lime is placed} after 5–10 NniH after entering the slag mixture of electroslag remelting and secondary production waste. mention in the ratio

1: (1.1-1.4).

The primary input of crc-go.ccc nui.i: a electrO1 and one remelting and from the production of secondary a-yomipi in front of the leach lends good conditions for b) rigorously and effectively dissolving the lime: lowering the temperature of the treatment and increasing the flow rate. , an additional overheating due to the oxidation of metallic aluminum, containing ;; it in the amount of 10-30% in the waste production of secondary alumina,

An additive of the electric assassin assay mixture and waste from the secondary aluminum production less than 5 NDiH before the introduction of lime does not accelerate the dissolution of lime because of incomplete absorption of the bath, and the additive of the mixture more than rm in 10 t-nin does not decrease the effect (1 The effect of fluoride ii a dissolution of the known.

WHEN Nfacci-i I ljfar-ca sjrcKTpo- slag remelting to mass of production wastes of secondary a. The more we eat 1: 1: 1, the speed of lime is reduced by pacTBOpeiHm due to the sharp BcneinisaiHin ass and loss of the mixture with download-1 slag. At a ratio of 1P {and a mass of slag to electroslag remelting and a mass of waste from the production of secondary mines 1: 1.4 SN1C ", the dilution effect of the mixture on furnace slag is due to 1% of fluorine in the mixture.

482

LP 11e1p: and the efficiency of the exploded-) 1H of the melting with the output beyond the optimum values.

II p and me. Steel G: FCC arches were melted in the 900-TO1P1OI open-hearth furnace, scrap metal was processed using the Koii oxygen process. During the period of refining, a mixture of pshak electric (melted remelting and waste from the production of recycled aluminum in a ratio of 1: 1.3 with total consumption; ohm mixture of 2 steels) was injected in limestone before the addition of lime into the ianny}. liuiaica for 30 tons after the addition of lime.

The results of the experimental plan are given in the table.

When steel was melted by the proposed method, the rate of increase of basicity was 1.3 u / h, by a known method of 0.7 u / h. Accelerating the pacTBopemiH lime allows for wire, fine finishing and refining of steel under a high-si homogeneous donkey with an increased rate of coal oxidation, toda and desulfurization of the metatzsche. This allows for HN1, the continuity of fine-tuning and the increase in production - POST15 of the steel-making unit. F o rmu l invention

The method of steel smelting in the hearth steelmaking aggregates, including lime additive and the input of a mixture of clay minerals; sludge and fluorine-containing materials with a total consumption of 1.5-3.0 kg / t, about tl and h and yk and with the fact that, in order to improve productivity by accelerating the dissolution of lime, as a fluorine-containing and alumina-containing materials 1.1 shp electric remelting (ESR) and recycled aluminum production waste are introduced at a ratio of 1: (1, 1.4), and the lime additive is used 5-10 min after the addition of pshak ESR and waste aluminum production.

ABOUT

"H

go

Sc |

about

m

cm

LO

ABOUT

W

go

about

n CNI

1L

about

go

00

UI

go

about

CN

YU

ABOUT

ъ

cm

sh

about

with

o see

MAA ""

OOOO

oooh

00000000

"Ъ" h "h

oooh

smsmsm

"Hftm"

----

(N SPCS

"KMMm

 And "-chg 4

smsmsm

"V" chag

-css

"PE M A

-Cs4sogo

- mA mI "h

-G4SPgo

 A "hI" h m

----

cm msmsm

- state yo

  "H" h h

---- about

mid-cmm

 14M "h" h

-----

000000g

 M "SI" k M

oo, oo

G OV00OL

g "hI M

oooh

o% co oo

 AAI "I. "H

oooh

and

t

oh oh and

cd free

about tl o p

Claims (2)

Claim The method of steel smelting in hearth steelmaking units, keying and introducing the mixture with a clay total flow rate of 1.5 tl II, lime additive of earth-containing and fluorine-containing materials with 3.0 to g / t, on the fact that, with the duration of lime, the celk is produced in solution — increasing acceleration as a fluorosoder — putms in of burning and alumina-containing materials, electroslag remelting slag (ESR) and secondary aluminum production wastes introduced at a ratio of 1: (1.1-1.4) are used, and lime is added 5–10 minutes after the addition of ESH ash and secondary wastes aluminum. 3.0 Midrange about cm YU a 3.0 ABOUT oh sch w about *1 with 00 about Midrange 1L about Joint venture YU oh sch w A 3.0 ate about Midrange YU a about g- g * g * • h A A A A about about about ABOUT ABOUT 00 04 04 g ** A A A A A about about about about about 00 with oo 00 A A A A A about about about about about oo Midrange Midrange (H mid A A η A A about * “* ** oo With mid With Midrange A A A A A about * “** * - * g- mid mid mid mid A A A A A about · “* · cho mid cp GO A A a A A about g *. mid with With A A A A A about * “* 00 mid With GO A A A A A about · ”* 00 mid mid Midrange mid A A A A A about * “* Joint venture Joint venture mid mid A a A A A about * “* g * mid , _g mid mid A A A A A about · “* * “* Joint venture 00 with with G-. A A A A A about about about about ABOUT g * - g- o> 00 04 A A A A A about about about ABOUT ABOUT g * Joint venture with G-- 00 A A A A A about about ABOUT about ABOUT ί a f a f 1 About in from X in <and about about r? ί- about ο m S <ύ about l I x η L "in l § § § I § oh w η F Λ a s about S about in § a l about FROM l a η l about in about The EU about A mixture of bauxite and fluorspar in the ratio