SU954754A1

SU954754A1 - Two-bath steel-melting furnace

Info

Publication number: SU954754A1
Application number: SU782592690A
Authority: SU
Inventors: Владимир Николаевич Фролов; Людмила Никитична Трилевская; Генрих Владимирович Слинько; Анатолий Васильевич Гребенюков; Вадим Петрович Игнатьев; Владимир Артемьевич Рыбинов
Original assignee: Коммунарский горно-металлургический институт
Priority date: 1978-03-14
Filing date: 1978-03-14
Publication date: 1982-08-30

Description

(5) ДВУХВАННАЯ СТАЛЕПЛАВИЛЬНАЯ ПЕЧЬ(5) TWO-STEELED STEEL-MAKING FURNACE

Изобретение относитс к черной металлургии, конкретнее к конструкци м подводных сталеплавильных печей.The invention relates to ferrous metallurgy, and more specifically to structures of submerged steel-smelting furnaces.

Известна сталеплавильна печь с трем ваннами, в которой с целью обеспечени передачи чугуна из средней ванны в крайние самотеком, средн оанна расположена выше уровн крайних ванн и соединена с ними каналами , снабженными огнеупорными задвижками ij .A three-bath steel-smelting furnace is known in which, in order to ensure the transfer of cast iron from the middle bath to the extreme by gravity, the middle row is located above the level of the extreme bath and is connected to them with channels equipped with refractory valves ij.

Недостатком данной сталеплавильной печи вл етс низка производительность , работа скрап-рудным процессом с высоким содержанием в шихте жидкого чугуна и высокие потери тепла со сливаемым шлаком.The disadvantage of this steel-smelting furnace is low productivity, operation of the scrap ore process with a high content of liquid iron in the charge and high heat loss with the slag to be drained.

Наиболее близкой по технической сущности и достигаемому результату к предлагаемой вл етс двухванна печь, включающа две ванны, разделенные порогом, характеризующа с тем, что с целью облегчени слива шлака из печи, в пороге выполнен желоб сThe closest to the technical essence and the achieved result to the proposed is a two-bath furnace, comprising two baths, separated by a threshold, characterized in that in order to facilitate the discharge of slag from the furnace, a groove is made in the threshold.

уклоном к задней стенке, а против желоба в задней стенке - отверстие и в передней стенке проем 2 .slope to the rear wall, and against the chute in the rear wall - the hole and in the front wall of the opening 2.

Недостатком известной двухванной сталеплавильной печи вл етс высокий угар железа, вызванный полным удалением шлака, низка производительность агрегата за счет потерь физического тепла шлака и ухудшени условий шлакообразовани в св зи с полным удале10 нием железистоосновного шлака.A disadvantage of the known two-bath steel-smelting furnace is high iron loss caused by complete removal of slag, low productivity of the unit due to loss of physical heat of slag and deterioration of slagging conditions in connection with complete removal of iron-based slag.

Цель изобретени - улучшение шлакообразовани - , сокращение длительности плавки и снижение угара железа.The purpose of the invention is to improve slag formation, shorten the duration of smelting and reduce iron loss.

1515

Поставленна цель достигаетс тем, что в двухванной сталеплавильной печи , разделенной порогом, отношение высоты разделительного порога к высоте порогов заволочных окон равно The goal is achieved by the fact that in a two-bath steel-smelting furnace divided by a threshold, the ratio of the height of the separation threshold to the height of the thresholds of the overhead windows is

20 0,9-1,25.20 0.9-1.25.

Claims

The ratio of the heights of the separation threshold and the thresholds of the charging windows, 0,, 25, is selected. Of the conditions of the possibility of the possibility of slag overflow from one bath to another. A decrease in the ratio of the heights of the thresholds of less than 0.9 will lead to the overflow of the metal into the second bath, and with an increase in the ratio above 1.25 to the inability of the overflow of slag from one bath to another. The drawing shows a double-steel furnace, longitudinal section cut. Two melting baths 1 and 2 section we threshold 3. The device works as follows. In the process of boiling the bath 1, the slag over the threshold 3 is poured into the bath on the preloaded metal and lime. When slag gets in during the warming up of the bath 2, its heat is transferred to the charge materials. Received slag covers scrap metal and protects it. After the slag enters the bath 2 pours, with | cast iron and at the end of the process of souring silicon, the primary slag is downloaded through the threshold of the bulkhead window. After downloading the primary slag, a new slag pickup is produced due to the additives of slag-forming flux and the slag poured from the bath 2. 1 The vat formed in bath 2 is poured into bath 1 loaded with scrap and lime. Then the cycle repeats. The proposed design allows, by improving the slagging process, to reduce the iron burn and increase productivity by utilizing the heat of the slag. The economic effect will be 50 kopecks per ton of finished steel. Claims. A two-bath steel-smelting furnace with a dividing threshold, characterized in that, in order to shorten the duration of smelting. and reducing iron loss by improving slag formation, the ratio of the height of the separation threshold to the height of the threshold levels of the barrier windows is 0.9-1.25. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 289276, cl. F 27 B W / S, 1967.

2. USSR author's certificate No. 31009, cl. F 27 V 3/00, 1969.