CN106282459A - A kind of protect ferrum port area bricking beat mud method - Google Patents

Abstract

The present invention provide a kind of protect ferrum port area bricking beat mud method, when blocking up after being specifically included in the ferrum mouth splash of blast furnace casting later stage, by clay gun, stemming is squeezed into the 80～85 of normal mud amount for the first time, beating the mud time is 12～14s, and beating mud pressure is 10～13MPa；Beating for the first time interval 20s after mud terminates, second time squeezes into remaining 15～20 mud amount in step 1, and beating the mud time is 2s, and beating mud pressure is 12～15MPa, and the maintenance ferrum mouth degree of depth is 2～2.2m.The present invention beats mud method by twice dozen of mud of employing, improve ferrum mouth qualification rate, ferrum mouth qualification rate is promoted to 97.2% after implementing by 80.1% before implementing, the ferrum saliva temperature difference is stable at 1.4～1.5 DEG C, effect is especially pronounced, and the ferrum mouth degree of depth is steadily in the long term more than 2 meters, and taphole mud bag is stable, ferrum port area gas fire is effectively controlled, effectively closure ferrum port area gas passage.

Description

A kind of protect ferrum port area bricking beat mud method

Technical field

The invention belongs to metallurgical technology field, be specifically related to a kind of protect ferrum port area bricking beat mud method.

Background technology

Blast furnace was blocked up and is used stemming disposably to squeeze in ferrum mouth passage by clay gun in the past, formed mud drum to protect ferrum mouth region The operational approach of territory bricking.This operational approach is stable in the ferrum mouth degree of depth, gas leak amount hour is just able to maintain that in ferrum mouth passage Normal blast fumance；Once arriving the stove labour later stage, cupola well ferrum port area corrodes serious, and ferrum port area is difficult to row and becomes mud drum, and ferrum mouth is deep Degree maintenance difficulties is big, affects blast furnace safety simultaneously and produces.

Summary of the invention

The present invention provide a kind of protect ferrum port area bricking beat mud method, to solve in prior art after blast furnace casting When blocking up after phase ferrum mouth splash, owing to cupola well ferrum port area corrodes serious, ferrum port area is difficult to embark on journey the problem of mud drum.

To this end, the technical solution used in the present invention is: a kind of protect ferrum port area bricking beat mud method, including walking as follows Rapid:

Step 1: when blocking up after the ferrum mouth splash of blast furnace casting later stage, squeezes into the 80 of normal mud amount by clay gun for the first time by stemming ～85, beating the mud time is 12～14s, and beating mud pressure is 10～13MPa；

Step 2: beat interval 20s after mud terminates for the first time, second time squeezes into remaining 15～20 mud amount in step 1, when beating mud Between be 2s, beating mud pressure is 12～15MPa, maintain the ferrum mouth degree of depth be 2～2.2m.

Under normal circumstances, when clay gun by stemming after ferrum mouth passage is squeezed in cupola well, its " dead ahead " runs in cupola well burnt " stop " of charcoal, stemming will spread to surrounding along furnace wall centered by ferrum mouth rapidly, also can advance to " dead ahead " simultaneously, enter Entering after the stemming of cupola well runs into incandescent coke, " duricrust " can be formed rapidly in its surface, and along with playing the increase of mud amount, " duricrust " can be by Gradually pushing ahead, the stemming of follow-up entrance will continue to spread to " duricrust " surrounding, promote " duricrust " surface area to be gradually increased.Along with The increase of " duricrust " surface area, the mud pressure of beating of clay gun also increases, when mud spray gun plugging pressure reaches to a certain degree or beats mud Amount is when reaching a certain amount of, and mud drum will basically form owing to hot metal ratio is great, beat mud initial stage mud drum first can upwards, increase forward, When mud drum " duricrust " area reaches to a certain degree, mud spray gun plugging pressure reach a certain amount of after, mud drum just can increase downwards.Namely Saying, beating mud later stage mud drum and can be pressed into cupola well and increase downwards, only mud drum can increase downwards, and mud drum can be " raw Root ".

The invention have the benefit that by use twice dozen of mud beat mud method, it is downward that mud drum can be pressed into cupola well Increasing, mud drum " is taken root ", improves ferrum mouth qualification rate, and ferrum mouth qualification rate is promoted to 97.2% after implementing by 80.1% before implementing, The ferrum saliva temperature difference is stable at 1.4～1.5 DEG C, and effect is especially pronounced, and the ferrum mouth degree of depth is steadily in the long term more than 2 meters, and taphole mud bag is steady Fixed, ferrum port area gas fire is effectively controlled, effectively closure ferrum port area gas passage.

Detailed description of the invention

Below in conjunction with embodiment, the present invention is described in further details.

1, the control of mud amount is played

Mud amount is not enough, easily causes the ferrum mouth degree of depth and does not reaches requirement；When mud amount is excessive, mud drum extends longer in stove, by ferrum After water floating force, front end can upwards " come back ", and when running into this kind of situation, ferrum mouth easily ruptures, and mud drum is the most easily consolidated simultaneously.This To maintain the rational ferrum mouth degree of depth when being accomplished by according to normal production be 2～2.2m, dress mud quantity 10～12 pieces are made reasonably Beat the mud time.

2, mud Stress control is beaten

Being interrupted when beating mud, second time is beaten mud pressure outline and is higher than first time and beats mud pressure, but pressure is the highest not can exceed that clay gun sets The constant-pressure upper limit 10～15MPa, otherwise can cause stemming not enter, and the mud amount deficiency ferrum mouth degree of depth declines, simultaneously also can be to clay gun Equipment causes damage.

3, determine interval time

Beating mud too short for interval time, it is unhardened for the first time to squeeze into the stemming in stove, and the stemming that second time is squeezed into enters after in stove not Can effectively spread to surrounding and lower section, not reach the effect of stable mud drum；As interval time is long, squeeze in stove for the first time After stemming is fully hardened, secondary mud amount can be caused to can not get through, be likely to cause race mud simultaneously, affect the normal work of ferrum mouth Making, this is accomplished by being determined by experiment suitable interval time according to different types of stemming.

Embodiment 1

A kind of protect ferrum port area bricking beat mud method, comprise the steps:

Step 1: when blocking up after the ferrum mouth splash of blast furnace casting later stage, clay gun dress mud quantity is 10～12 pieces, by clay gun by big gun Mud squeezes into for the first time the 85 of dress mud amount, and beating the mud time is 14s, and beating mud pressure is 13MPa；

Step 2: beat for the first time interval 20s after mud terminates, squeeze into remaining 15 mud amounts in step 1 for the second time, beating the mud time is 2 S, beating mud pressure is 15MPa, and maintaining the ferrum mouth degree of depth is 2.2m, it is ensured that during beating mud, ferrum mouth passage can enter mud smoothly, it is ensured that enters Mud amount.

When second time beats mud, the mud drum squeezed into for the first time and " duricrust " entirety formed will be elapsed forward, make The stemming that second time is squeezed into spreads along furnace wall to surrounding.While improving the ferrum mouth degree of depth, also mud drum can be played consolidation Effect.It is high that second time beats mud pressure relatively for the first time, it is possible to increase stemming degree of compaction in ferrum mouth passage, effectively to filling mud drum The crack of middle appearance blocks, and the gas leak in envelope stifled iron notch passage is played well effect, is more beneficial for normal raw The maintenance of ferrum mouth during product.

Claims (1)

1. one kind protect ferrum port area bricking beat mud method, it is characterised in that comprise the steps:

Step 1: when blocking up after the ferrum mouth splash of blast furnace casting later stage, squeezes into the 80 of normal mud amount by clay gun for the first time by stemming ～85, beating the mud time is 12～14s, and beating mud pressure is 10～13MPa；

Step 2: beat interval 20s after mud terminates for the first time, second time squeezes into remaining 15～20 mud amount in step 1, when beating mud Between be 2s, beating mud pressure is 12～15MPa, maintain the ferrum mouth degree of depth be 2～2.2m.