CN109280746A - A kind of dynamic control method of KR desulfurization stirring - Google Patents
A kind of dynamic control method of KR desulfurization stirring Download PDFInfo
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- CN109280746A CN109280746A CN201811450685.4A CN201811450685A CN109280746A CN 109280746 A CN109280746 A CN 109280746A CN 201811450685 A CN201811450685 A CN 201811450685A CN 109280746 A CN109280746 A CN 109280746A
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- agitating paddle
- desulfurization
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- speed
- dynamic control
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention provides a kind of dynamic control method of KR desulfurization stirring, and after KR desulfurization starts, when agitating paddle is down to target position and revolution reaches 90% or more rated speed, agitating paddle revolution n is sent to level two computer by primary PLC.Level two computer starting agitating paddle dynamic control program, 1) start timing；Agitating paddle reduces by 50~100mm, agitating paddle 1~3m/min of decrease speed, 30~60s of mixing time after 3~5min；2) agitating paddle promotes 80~150mm, and agitating paddle promotes 1~3m/min of speed, 30~60s of mixing time；3) agitating paddle declines 30~50mm, 1~3m/min of agitating paddle decrease speed；4) agitating paddle continues 1~2min of desulfurization, and first stage movement terminates；5) agitating paddle returns to the position target position i.e. described in step 1 when agitating paddle dynamic control program starts.Using the method for the speed and insertion depth of dynamic regulation agitating paddle, it is therefore intended that the reaction dead zone for reducing molten iron in hot-metal bottle improves desulfuration efficiency under conditions of not increasing desulfurizing agent quantity.
Description
Technical field
The present invention relates to steel-making KR technical field of desulfurization, in particular to a kind of dynamic control method of KR desulfurization stirring.
Background technique
KR stirring-type doctor treatment is to immerse to carry out rotational agitation iron in hot-metal bottle with the blender of an outer lining refractories
Water makes molten iron that desulfurizing agent be added while generating vortex, so that it is involved in hot metal interior and sufficiently reacted, so that it is de- to reach molten iron
The purpose of sulphur.It has desulfuration efficiency high, and sorbent consumption is few, and hot metal temperature drop is small, and the activity duration is short, and metal loss is low and resistance to
The features such as fiery material consumption is low is adapted to the steel mill that low-sulfur, the requirement of super-low sulfur variety steel is high, ratio is big and uses.But in reality
In sweetening process, due to the erosion of unreasonable, agitating paddle the erosion deformation of agitating paddle insertion depth, hot-metal bottle tank skin and tank bottom
The factors such as variation cause desulfurization results miss the mark requirement.
Therefore, it in KR production process, not only can solve according to different condition dynamic regulation agitating paddle insertion depth
Problem is stated, sorbent utilization is improved, and meets the policy that country is rebuild traditional industry with new and high technology, this project implementation pair
Promoting the development of desulfurization is very important, economic benefit and the equal highly significant of social benefit.
Summary of the invention
In order to solve the problems, such as described in background technique, the present invention provides a kind of dynamic control method of KR desulfurization stirring, adopts
With the method for the speed and insertion depth of dynamic regulation agitating paddle, it is therefore intended that the reaction dead zone for reducing molten iron in hot-metal bottle,
Do not increase and improves desulfuration efficiency under conditions of desulfurizing agent quantity.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of dynamic control method of KR desulfurization stirring, includes the following steps:
Step 1: dropping to target position H by primary PLC control agitating paddle after KR desulfurization starts.
Step 2: starting agitating paddle rotating electric machine, when to reach 90% or more specified for primary PLC detection agitating paddle rotation revolution
When revolving speed, agitating paddle revolution n is sent to level two computer by primary PLC.
Step 3: level two computer starts agitating paddle after level two computer is connected to the revolving speed n text of agitating paddle primary PLC
Dynamic control program, the agitating paddle dynamic control program specific steps are as follows:
1) agitating paddle control program starts and starts timing；Agitating paddle reduces by 50~100mm after 3~5min, under agitating paddle
Reduction of speed 1~3m/min of degree, 30~60s of mixing time；
2) agitating paddle promotes 80~150mm, and agitating paddle promotes 1~3m/min of speed, 30~60s of mixing time；
3) agitating paddle declines 30~50mm, 1~3m/min of agitating paddle decrease speed；
4) agitating paddle continues 1~2min of desulfurization, and first stage movement terminates；
5) agitating paddle returns to the position target position i.e. described in step 1 when agitating paddle dynamic control program starts；
6) by 1) -5) step execution next stage movement.
Step 4: after desulfurization mixing time reaches the goal-setting time given by level two computer, level two computer
It is sent to agitating paddle primary PLC and lifts order, agitating paddle lifts, and KR desulfurization stirring terminates.
The target position H of agitating paddle in the step one is determined as follows:
H=H0+h+(Ma-M0)*K
Wherein: H is the target position of agitating paddle, unit mm；
H0The numerical value of the down position of agitating paddle when dropping to molten iron level for agitating paddle, unit mm；
H is agitating paddle blade height, unit mm；
Ma is to be actually loaded into iron water amount, unit t；
M0For the minimum iron water amount for meeting KR processing, unit t；
K is empirical, takes 6.0-6.5mm/t.
Compared with prior art, the beneficial effects of the present invention are:
1, using the method for the speed and insertion depth of dynamic regulation agitating paddle, it is therefore intended that reduce molten iron in hot-metal bottle
Reaction dead zone improves desulfuration efficiency under conditions of not increasing desulfurizing agent quantity.
2, by increasing level two computer agitating paddle dynamic control program and agitating paddle revolution primary PLC and level two computer
Data communication text realizes the speed of dynamic regulation agitating paddle and the control function of insertion depth.
3, by the target position H of determining agitating paddle, restart rotation after agitating paddle drops to target position, meanwhile,
When rotation speed reaches certain standard, then dynamic agitation is carried out, more improves the efficiency of whipping process.
Specific embodiment
Specific embodiment provided by the invention is described in detail below.
A kind of dynamic control method of KR desulfurization stirring, includes the following steps:
Step 1: dropping to target position H by primary PLC control agitating paddle after KR desulfurization starts；
Step 2: starting agitating paddle rotating electric machine, when to reach 90% or more specified for primary PLC detection agitating paddle rotation revolution
When revolving speed (generally 100~125r/min), agitating paddle revolution n is sent to level two computer by primary PLC；
Step 3: level two computer starts agitating paddle after level two computer is connected to the revolving speed n text of agitating paddle primary PLC
Dynamic control program, the agitating paddle dynamic control program specific steps are as follows:
1) agitating paddle control program starts and starts timing；Agitating paddle reduces by 50~100mm after 3~5min, under agitating paddle
Reduction of speed 1~3m/min of degree, 30~60s of mixing time；
2) agitating paddle promotes 80~150mm, and agitating paddle promotes 1~3m/min of speed, 30~60s of mixing time；
3) agitating paddle declines 30~50mm, 1~3m/min of agitating paddle decrease speed；
4) agitating paddle continues 1~2min of desulfurization, and first stage movement terminates；
5) agitating paddle returns to the position target position i.e. described in step 1 when agitating paddle dynamic control program starts；
6) by 1) -5) step execution next stage movement.
Step 4: after desulfurization mixing time reaches the goal-setting time given by level two computer, level two computer
It is sent to agitating paddle primary PLC and lifts order, agitating paddle lifts, and KR desulfurization stirring terminates.
The target position H of agitating paddle in the step one is determined as follows:
H=H0+h+(Ma-M0)*K
Wherein: H is the target position of agitating paddle, unit mm；
H0The numerical value of the down position of agitating paddle when dropping to molten iron level for agitating paddle, unit mm；
H is agitating paddle blade height, unit mm；
Ma is to be actually loaded into iron water amount, unit t；
M0For the minimum iron water amount for meeting KR processing, unit t；
K is empirical, takes 6.0-6.5mm/t.
Above embodiments are implemented under the premise of the technical scheme of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to the above embodiments.Method therefor is such as without spy in above-described embodiment
Not mentionleting alone bright is conventional method.
Claims (2)
1. a kind of dynamic control method of KR desulfurization stirring, which comprises the steps of:
Step 1: dropping to target position H by primary PLC control agitating paddle after KR desulfurization starts；
Step 2: starting agitating paddle rotating electric machine, when primary PLC detection agitating paddle rotation revolution reaches 90% or more rated speed
When, agitating paddle revolution n is sent to level two computer by primary PLC；
Step 3: level two computer starts agitating paddle dynamic after level two computer is connected to the revolving speed n text of agitating paddle primary PLC
Control program, the agitating paddle dynamic control program specific steps are as follows:
1) agitating paddle control program starts and starts timing；Agitating paddle reduces by 50~100mm, reduction of speed under agitating paddle after 3~5min
Spend 1~3m/min, 30~60s of mixing time；
2) agitating paddle promotes 80~150mm, and agitating paddle promotes 1~3m/min of speed, 30~60s of mixing time；
3) agitating paddle declines 30~50mm, 1~3m/min of agitating paddle decrease speed；
4) agitating paddle continues 1~2min of desulfurization, and first stage movement terminates；
5) agitating paddle returns to the position target position i.e. described in step 1 when agitating paddle dynamic control program starts；
6) by 1) -5) step execution next stage movement；
Step 4: level two computer is sent after desulfurization mixing time reaches the goal-setting time given by level two computer
Order is lifted to agitating paddle primary PLC, agitating paddle lifts, and KR desulfurization stirring terminates.
2. a kind of dynamic control method of KR desulfurization stirring according to claim 1, which is characterized in that the step
The target position H of agitating paddle in one is determined as follows:
H=H0+h+(Ma-M0)*K
Wherein: H is the target position of agitating paddle, unit mm；
H0The numerical value of the down position of agitating paddle when dropping to molten iron level for agitating paddle, unit mm；
H is agitating paddle blade height, unit mm；
Ma is to be actually loaded into iron water amount, unit t；
M0For the minimum iron water amount for meeting KR processing, unit t；
K is empirical, takes 6.0-6.5mm/t.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811450685.4A CN109280746B (en) | 2018-11-30 | 2018-11-30 | Dynamic control method for KR desulfurization stirring |
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| CN201811450685.4A CN109280746B (en) | 2018-11-30 | 2018-11-30 | Dynamic control method for KR desulfurization stirring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988879A (en) * | 2019-04-03 | 2019-07-09 | 山东钢铁股份有限公司 | A method of the raising desulfurizing agent volume applied to KR desulfurizing iron process inhales effect |
| CN111057816A (en) * | 2019-12-13 | 2020-04-24 | 首钢京唐钢铁联合有限责任公司 | Method and device for stirring molten iron substitute |
| CN111394535A (en) * | 2020-03-30 | 2020-07-10 | 安徽工业大学 | Step-by-step KR stirring desulfurization method for molten iron |
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| CN109988879A (en) * | 2019-04-03 | 2019-07-09 | 山东钢铁股份有限公司 | A method of the raising desulfurizing agent volume applied to KR desulfurizing iron process inhales effect |
| CN111057816A (en) * | 2019-12-13 | 2020-04-24 | 首钢京唐钢铁联合有限责任公司 | Method and device for stirring molten iron substitute |
| CN111057816B (en) * | 2019-12-13 | 2021-11-05 | 首钢京唐钢铁联合有限责任公司 | Method and device for stirring molten iron |
| CN111394535A (en) * | 2020-03-30 | 2020-07-10 | 安徽工业大学 | Step-by-step KR stirring desulfurization method for molten iron |
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| CN109280746B (en) | 2020-06-05 |
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