CN105986050A - Method for quickly increasing resting iron notch depth - Google Patents

Abstract

The invention discloses a method for quickly increasing the resting iron notch depth. The method comprises the following steps: (1) determining an iron notch coefficient n: determining an iron notch coefficient n in a formula through statistics of the data of daily mud ramming quantity and actual depth of iron notch; (2) determining the iron notch mud ramming quantity D1 when a first furnace is applied to the resting iron notch: when the first furnace is applied to the iron notch, detecting the iron notch depth h1 of the first furnace, and calculating the iron notch mud ramming quantity D1 of the first furnace through a formula (1); and (3) controlling the progressive increase of the iron notch mud ramming quantity: according to the iron notch mud ramming quantity D1 of the first furnace, increasing the mud ramming quantity by D1*5% after two furnaces are stabilized, and stabilizing the tapping of the two furnaces on the basis to form a stationary mud drum; and repeating the steps, and finally recovering the resting iron notch depth to the depth during normal production. The method disclosed by the invention not only realizes an effect of increasing the iron notch depth, but also can reduce the stemming consumption through the way of controlling the mud ramming quantity.

Description

A kind of fast lifting is stopped the method for the ferrum mouth degree of depth

Technical field

The present invention relates to a kind of fast lifting stop the method for the ferrum mouth degree of depth, belong to technical field of blast furnace process.

Background technology

Blast furnace taphole is the passage that molten iron discharges out of the furnace in stove, and general large blast furnace is furnished with 3-4 ferrum mouth, blast furnace taphole Number is produced daily the factors such as iron, system of tapping a blast furnace, slag iron runner maintenance and is determined by blast furnace.In daily production, blast furnace can alternately be repaired Slag iron runner, this results at least 1 ferrum mouth and is in dormant state, namely this ferrum mouth not molten iron discharging.But, due to the ferrum that stops Mouth does not taps a blast furnace for 5-10 days, and in stove, mud drum in blast furnace is constantly washed away and corrodes by molten iron, and the ferrum mouth that stops cannot supplement new Stemming, the ferrum mouth degree of depth is along with shoaling.Normal conditions, ferrum mouth degree of depth 3300-3800mm that large blast furnace normally taps a blast furnace, and the ferrum that stops Mouth ferrum mouth degree of depth when coming into operation is only 2200-2600mm, the most shallow serious accident being easy to occur ferrum mouth to run big stream of blast furnace taphole, The most a large amount of molten iron moments gush tapping hole, it is easy to security incident occurs.Ferrum mouth is once occurred to run big stream, it is necessary to checking is blocked up.

Therefore, after the ferrum mouth for stopping comes into operation, blast furnace safety is produced by its degree of depth of fast lifting greater significance.Promote The ferrum mouth degree of depth of stopping also is the essential condition of steady production.Generally, ferrum mouth depth recovery is stopped to ferrum during normal production The mouth degree of depth needs this ferrum mouth at least to go out 10 molten iron, i.e. this ferrum mouth at least needs 8 stove molten iron could recover the normal ferrum mouth degree of depth. Shortening the ferrum mouth degree of depth to time of normal level of recovering to stop is flushing and casting person's urgent problem.

Summary of the invention

A kind of method of the ferrum mouth degree of depth it is desirable to provide fast lifting is stopped, propose when the ferrum mouth that stops comes into operation according to The first stove ferrum mouth degree of depth controls different mud amounts of beating and beats mud amount and be incremented by amplitude, and the ferrum mouth degree of depth of stopping the most at last is the most extensive Multiple to degree of depth during normal production.

The present invention uses basic fundamental to conceive: the ferrum mouth degree of depth is mainly determined by mud drum size in furnace wall thickness and stove, stops In ferrum mouth stove only, mud drum can by molten iron and slag action totally, and ferrum mouth ultimate depth of stopping is only furnace wall thickness.For promoting The ferrum mouth degree of depth, only by the ferrum mouth going out molten iron to the greatest extent is continuously increased dozen mud amount, finally, makes Tie Kou front end form stable mud Wrap, and then the ferrum mouth degree of depth could promote.

The invention provides a kind of fast lifting to stop the method for the ferrum mouth degree of depth, specifically include following steps:

(1) ferrum mouth coefficient n is determined:

Mud amount of beating ferrum mouth depends on the ferrum mouth degree of depth and mud drum volume, cannot measure the body of mud drum in stove in process of production Long-pending, ferrum mouth is beaten the computing formula of mud amount and is:

D=n × (1/4) π d²hρ (1)

Wherein:

D-ferrum mouth beats mud amount, kg；

N-ferrum mouth coefficient；

D-ferrum mouth diameter, m；

The h-ferrum mouth degree of depth, m；

ρ-stemming density, kg/m³；

Obtain ferrum mouth and beat the relational expression of mud amount and the ferrum mouth degree of depth；

By adding up the daily data beating mud amount and ferrum mouth actual grade, determine the ferrum mouth coefficient n in formula, it may be assumed that

$n=\frac{D}{(1/4){\mathrm{\πd}}^{2}h\mathrm{\ρ}}---\left(2\right)$

Tapping hole coefficient n is calculated by above formula；

(2) determine the ferrum mouth that stops come into operation the first stove time ferrum mouth beat mud amount D1:

Come into operation ferrum mouth time, detect first stove ferrum mouth degree of depth h1, by formula (1), calculate the first stove ferrum mouth and beat mud amount D1；

(3) control ferrum mouth beat mud amount be incremented by:

Beating mud amount according to ferrum mouth during the first stove is D1, stablize two furnace rear will beat mud amount increase D1*5%, the most surely Fixed two stoves tap a blast furnace, and form fixing mud drum；Repeat the above steps, deep to during normal production of ferrum mouth depth recovery of stopping the most at last Degree.

Further, the specific operation process of described step (3) is:

Beating mud amount according to ferrum mouth during the first stove is D1, ferrum mouth come into operation before two stoves, ferrum mouth is beaten mud amount and is controlled as D1, to the 3rd stove Time, formed and start to add mud after stablizing initial mud drum；

3rd stove, beats mud amount and increases to D1* (1+5%), and this dozen of mud amounts are stablized two stoves and tapped a blast furnace, and forms fixing mud drum；

5th stove increases D1*5% than the mud amount of beating of the 3rd stove, and this dozen of mud amounts are stablized two stoves and tapped a blast furnace；

Continue repeat the above steps: stablize two furnace rear will beat mud amount increase D1*5%, until stopping ferrum mouth depth recovery extremely Degree of depth during normal production.

Beneficial effects of the present invention:

(1) this method large blast furnace is stopped ferrum mouth come into operation after the lifting of the ferrum mouth degree of depth have obvious effect, use This method can will come into operation after ferrum mouth degree of depth 2400-2600mm, after 4-6 stove taps a blast furnace, fast lifting to more than 3300mm, and tieing up Hold this degree of depth.

(2) not only the lifting ferrum mouth degree of depth being had effect by this method, meanwhile, the mode beating mud amount through above-mentioned control can Reduce stemming consumption.

Accompanying drawing explanation

Fig. 1 is that in embodiment 1, ferrum mouth is beaten mud amount and is incremented by amplitude schematic diagram.

Fig. 2 is ferrum mouth degree of depth actual change situation map in embodiment 1.

Detailed description of the invention

Further illustrate the present invention below by embodiment, but be not limited to following example.

Embodiment:

The present invention being tried out in No. 5 front operation areas of State of Blast Furnace of Taiyuan Iron and Steel Co., specific embodiment is as follows:

No. 1 ferrum mouth of (1) No. 5 blast furnace comes into operation after stopping 7 days, first follows the tracks of No. 1 daily mud amount of beating of ferrum mouth of statistics deep with ferrum mouth The situation of degree, arbitrarily takes out 300 groups of respective value beating mud amount and the ferrum mouth degree of depth, calculate this ferrum mouth beat the average of mud amount with The average of the ferrum mouth degree of depth.Ferrum mouth degree of depth average 3400mm of No. 1 ferrum mouth, beats mud amount average 520kg.

(2) this ferrum mouth coefficient n is determined

According to mud amount of beating, ferrum mouth diameter and stemming density corresponding to the daily statistics tapping hole degree of depth, bring formula (2) into In, calculate tapping hole coefficient n.

By h=3.4m, D=520kg, d=0.125m and ρ=2.3kg/m³Bring formula (2) into:

$n=\frac{D}{(1/4){\mathrm{\πd}}^{2}h\mathrm{\ρ}}---\left(2\right)$

$n=\frac{520}{(1/4)*\mathrm{\π}*{\left(0.125\right)}^2*3.4*2.3}=5.42$

No. 1 ferrum mouth is beaten the relation of mud amount and the ferrum mouth degree of depth and is seen formula (3):

D=5.42 × (1/4) π d²hρ (3)

No. 1 ferrum mouth comes into operation primary ferrum mouth degree of depth h=2.6m, by formula (3), beats mud amount D1=400kg for the first time.

(3) No. 1 ferrum mouths are beaten mud amount and are incremented by amplitude

According to this method, formulate No. 1 ferrum mouth and beat the amplification situation of mud amount as shown in Figure 1.

Beating mud amount according to ferrum mouth during the first stove is D1=400kg, ferrum mouth come into operation before two stoves, ferrum mouth beat mud amount control be 400kg, during to three stoves, is formed and starts to add mud after stablizing initial mud drum；

3rd stove, beats mud amount and increases to 420kg, and this dozen of mud amounts are stablized two stoves and tapped a blast furnace, and forms fixing mud drum；

5th stove increases 20kg than the mud amount of beating of the 3rd stove, is 440kg, and this dozen of mud amounts are stablized two stoves and tapped a blast furnace, and is formed solid Fixed mud drum；

7th stove, beats mud amount and increases to 460kg；

(4) using effect

Using such scheme, after No. 1 ferrum mouth comes into operation, actual iron mouth change in depth situation is as shown in Figure 2.

From above-mentioned trial effect, it is known that this method is feasible and effective, after tapping a blast furnace at 6 times, the ferrum mouth degree of depth rises to 3300mm.That is:, after can being tapped a blast furnace at 6 times by said method, the ferrum mouth degree of depth is risen to the normal level of production.Meanwhile, by we Method can save stemming 0.5 ton, can save 30 tons the whole year, and stemming per ton 5000 yuan, the whole year can save 150,000 yuan.

Claims (2)

1. a fast lifting is stopped the method for the ferrum mouth degree of depth, it is characterised in that: comprise the following steps:

(1) ferrum mouth coefficient n is determined:

Mud amount of beating ferrum mouth depends on the ferrum mouth degree of depth and mud drum volume, cannot measure the volume of mud drum, ferrum in stove in process of production Mouth beats the computing formula of mud amount:

D=n × (1/4) π d²hρ (1)

Wherein:

D-ferrum mouth beats mud amount, kg；

N-ferrum mouth coefficient；

D-ferrum mouth diameter, m；

The h-ferrum mouth degree of depth, m；

ρ-stemming density, kg/m³；

Obtain ferrum mouth and beat the relational expression of mud amount and the ferrum mouth degree of depth；

By adding up the daily data beating mud amount and ferrum mouth actual grade, determine the ferrum mouth coefficient n in formula, it may be assumed that

$n=\frac{D}{(1/4){\mathrm{\πd}}^{2}h\mathrm{\ρ}}---\left(2\right)$

Tapping hole coefficient n is calculated by above formula；

(2) determine the ferrum mouth that stops come into operation the first stove time ferrum mouth beat mud amount D1:

Come into operation ferrum mouth time, detect first stove ferrum mouth degree of depth h1, by formula (1), calculate the first stove ferrum mouth and beat mud amount D1；

(3) control ferrum mouth beat mud amount be incremented by:

Beating mud amount according to ferrum mouth during the first stove is D1, stablize two furnace rear will beat mud amount increase D1*5%, stablize two on this basis Stove taps a blast furnace, and forms fixing mud drum；Repeat the above steps, ferrum mouth depth recovery of stopping the most at last is to degree of depth during normal production.

Fast lifting the most according to claim 1 is stopped the method for the ferrum mouth degree of depth, it is characterised in that: described step (3) Specific operation process is:

Beating mud amount according to ferrum mouth during the first stove is D1, ferrum mouth come into operation before two stoves, ferrum mouth is beaten mud amount and is controlled as D1, during to three stoves, Formation starts to add mud after stablizing initial mud drum；

3rd stove, beats mud amount and increases to D1* (1+5%), and this dozen of mud amounts are stablized two stoves and tapped a blast furnace, and forms fixing mud drum；

5th stove increases D1*5% than the mud amount of beating of the 3rd stove, and this dozen of mud amounts are stablized two stoves and tapped a blast furnace；

Continue repeat the above steps: stablize two furnace rear will beat mud amount increase D1*5%, until ferrum mouth depth recovery of stopping is to normally Degree of depth during production.