CN104032066A - Process for maintaining converter lining by combining metal material with heat-state furnace slag - Google Patents

Abstract

The invention discloses a process for maintaining a converter lining by combining a metal material with heat-state furnace slag, and relates to the technical field of steelmaking converter lining repairing of iron and steel enterprises. The process comprises the following steps: when an iron suffering surface of a converter is required to be repaired due to generation of a pit and a groove, a converter slagging system is adjusted to properly increase the viscosity of the furnace slag; 1.0-1.5 t of metal material with piece weight not greater than 30 kg is fed in a waste steel tank for future use; after molten steel is fully discharged from the converter, viscous furnace slag is left; the converter is tilted to a molten iron receiving angle; the prepared metal material is fed in the pit and the groove of the iron suffering surface through the waste steel tank; a main body of the converter is tilted to a horizontal position for standing 3-5 minutes, so that the surface of the metal material is slightly fused by high-temperature furnace slag, and is mixed with the furnace slag to form a slag-iron mixture; and the slag-iron mixture is cooled and attached on the furnace lining. The process can help a lot of iron and steel enterprises to relieve the labor intensity, to reduce the consumption of magnesium fettling refractory materials, to improve the converter productivity and to enhance the enterprise economic benefit.

Description

A kind of metal charge is safeguarded the technique that turns furnace retaining lining in conjunction with thermal slag

Technical field:

The present invention relates to iron and steel enterprise's steel-making converter lining repairing technical field, be specifically related to a kind of stove metal charge that utilizes and in conjunction with thermal slag in converter, repair the novel process of converter lining.

Background technology:

Iron and steel enterprise's converter lining patching normally by slag splashing technique, manually throw in that the technique of magnesium refractory sintering realizes.

Slag splashing is to utilize the high speed nitrogen gas stream thigh that oxygen lance spraying goes out that the thermal slag in stove is splashed on tubular furnace lining inwall, and condensation forms the effect that uniform slag layer plays protection furnace lining, and spattering slag whole process approximately needed about 3 minutes.The life-span of spattering slag blanket only can maintain conventionally smelts about 1 hour.

When converter lining is subject to untouchable (be called toward converter hot metal charging, converter lining is hit while adding steel scrap region be subject to untouchable) to occur pit (or groove), spattering slag mode cannot fill up for pit areas strengthening, and then levelling pit.At this moment just need manually to pit areas, to throw in magnesium refractory fettling and make magnesium refractory become an integral body to come fettling to extend the life-span of furnace lining with lining sintering.No. one time fettling, sintering approximately need 30～60 minutes consuming time.The life-span of artificial repair layer can maintain about 20 hours conventionally.Artificial throw that benefit mode is time-consuming, effort, cost is higher and reduced the productivity of converter.

Summary of the invention:

The object of this invention is to provide a kind of metal charge and in conjunction with thermal slag, safeguard the technique of converter lining, it can improve the working life of artificial repair layer, use with slag splashing process matching, can significantly reduce the frequency of artificial input magnesium refractory fettling, there is the features such as continuity easy and simple to handle, that the used time is short, handiness is strong, production is grown and can be guaranteed to the repair layer life-span.The metal charge that adds input can convert molten steel completely to, can not produce extra-pay, thus can help numerous Steel Plant alleviate labor strength, reduce the resistance to material of magnesia fettling consumption, improve converter productivity, improve Business Economic Benefit.

In order to solve the existing problem of background technology, the present invention is by the following technical solutions: its processing step is:

(1). when converter is subject to untouchablely while occurring that pit, groove need to be repaired, converter slag-making system is adjusted, suitably improved the viscosity of slag; Select clean metal charge 1.0～1.5t dry, substance≤30kg to pack scrap box into standby;

(2). converter goes out the slag that leaves thickness after molten steel to the greatest extent, and converter inclining, to the angle of accepting molten iron, is dropped into the metal charge of getting ready to be subject to untouchable pit, groove by scrap box;

(3). revolving furnace body is fascinated to level attitude standing 3～5 minutes, make metal charge surface slightly melted by high temperature furnace slag, be combined slagging iron mixture cooling being attached on furnace lining with slag;

(4). confirm that slag iron mixture is after cooling adhering to, slowly tilting converter, to vertically spattering slag position, is carried out slag splashing technique, and while spattering slag, visual slag system situation is carried out the fine setting operation of slag composition;

(5). spatter that slag finishes the normal iron and steel scrap of rear execution, molten iron enters furnace operating, start normally to smelt.

Principle of the present invention is: metal charge mends nurse's skill in conjunction with thermal slag in converter and slag splashing process matching is used, increase substantially converter and be subject to the ability that untouchable anti-molten iron washes away, steel scrap impacts, and then alleviate labor strength, raising converter productivity, reduction converter refractory consumption.

The present invention has following beneficial effect: mend furnace retaining technique with tradition and compare, after adopting new technology, be subject to more than life-span of untouchable repair layer improves 2 times (reaching 60 hours), can alleviate labor strength, improve converter productivity, reduce fettling refractory consumption, improve Business Economic Benefit.

Embodiment:

This embodiment is by the following technical solutions: its processing step is:

(1). when converter is subject to untouchablely while occurring that pit, groove need to be repaired, converter slag-making system is adjusted, suitably improved the viscosity of slag; Select clean metal charge 1.0～1.5t dry, substance≤30kg to pack scrap box into standby;

(2). converter goes out the slag that leaves thickness after molten steel to the greatest extent, and converter inclining, to the angle of accepting molten iron, is dropped into the metal charge of getting ready to be subject to untouchable pit, groove by scrap box;

(3). revolving furnace body is fascinated to level attitude standing 3～5 minutes, make metal charge surface slightly melted by high temperature furnace slag, be combined slagging iron mixture cooling being attached on furnace lining with slag;

(4). confirm that slag iron mixture is after cooling adhering to, slowly tilting converter, to vertically spattering slag position, is carried out slag splashing technique, and while spattering slag, visual slag system situation is carried out the fine setting operation of slag composition;

(5). spatter that slag finishes the normal iron and steel scrap of rear execution, molten iron enters furnace operating, start normally to smelt.

The principle of this embodiment is: metal charge mends nurse's skill in conjunction with thermal slag in converter and slag splashing process matching is used, increase substantially converter and be subject to the ability that untouchable anti-molten iron washes away, steel scrap impacts, and then alleviate labor strength, raising converter productivity, reduction converter refractory consumption.

This embodiment has following beneficial effect: mend furnace retaining technique with tradition and compare, after adopting new technology, be subject to more than life-span of untouchable repair layer improves 2 times (reaching 60 hours), can alleviate labor strength, improve converter productivity, reduce fettling refractory consumption, improve Business Economic Benefit.

Claims (1)

1. metal charge is safeguarded a technique that turns furnace retaining lining in conjunction with thermal slag, it is characterized in that its processing step is:

(1). when converter is subject to untouchablely while occurring that pit, groove need to be repaired, converter slag-making system is adjusted, suitably improved the viscosity of slag; Select clean metal charge 1.0～1.5t dry, substance≤30kg to pack scrap box into standby;

(2). converter goes out the slag that leaves thickness after molten steel to the greatest extent, and converter inclining, to the angle of accepting molten iron, is dropped into the metal charge of getting ready to be subject to untouchable pit, groove by scrap box;

(3). revolving furnace body is fascinated to level attitude standing 3～5 minutes, make metal charge surface slightly melted by high temperature furnace slag, be combined slagging iron mixture cooling being attached on furnace lining with slag;

(4). confirm that slag iron mixture is after cooling adhering to, slowly tilting converter, to vertically spattering slag position, is carried out slag splashing technique, and while spattering slag, visual slag system situation is carried out the fine setting operation of slag composition;

(5). spatter that slag finishes the normal iron and steel scrap of rear execution, molten iron enters furnace operating, start normally to smelt.