CN114625096A - Dynamic equilibrium control method for material level of sinter mixture ore tank - Google Patents
Dynamic equilibrium control method for material level of sinter mixture ore tank Download PDFInfo
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- CN114625096A CN114625096A CN202210406714.7A CN202210406714A CN114625096A CN 114625096 A CN114625096 A CN 114625096A CN 202210406714 A CN202210406714 A CN 202210406714A CN 114625096 A CN114625096 A CN 114625096A
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- 239000000463 material Substances 0.000 title claims abstract description 95
- 239000000203 mixture Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 106
- 230000008859 change Effects 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims description 8
- 230000014509 gene expression Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004449 solid propellant Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- -1 flux Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32252—Scheduling production, machining, job shop
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
A dynamic equilibrium control method for the material level of a sinter mixture ore tank is characterized in that the dynamic equilibrium control is carried out on the material level of the sinter mixture ore tank by establishing an equivalent relation between the material loading amount of a batching chamber and the material loading amount of a sintering machine, specifically, the allowable fluctuation range of the material loading amount of the sintering machine is set, the adjustment amount required by the material loading amount of the batching chamber along with the change of the sintering machine speed and the material layer thickness is obtained through calculation, and the dynamic equilibrium of the material level of the sinter mixture ore tank is realized; the established equivalent relational expression is programmed to form a computer command and the computer command is input into an automatic sintering control system, and when the machine speed and the material layer thickness of the sintering machine change due to various reasons, the computer sends a command to a batching system to quickly adjust the instantaneous feeding amount and control the dynamic, balanced and stable operation of the material level of the mixed material and ore tank. By the method, the dynamic balance and stable operation of the material level of the mixture ore tank can be ensured for a long time, and the unbalance of the mixture ore tank is avoided.
Description
Technical Field
The invention relates to the technical field of sintering material level control, in particular to a dynamic equilibrium control method for the material level of a sintering mixture ore tank.
Background
The main sintering process flow comprises the following steps: the method comprises the following steps of feeding amount t/h of a batching chamber, uniformly mixing and granulating by a mixer, storing materials in a mixed material ore tank, distributing by a distributing device, igniting by an ignition furnace, sintering by a sintering machine, crushing by a single-roller crusher, cooling by a circular cooler, screening and granulating by a finished product sieve, and outputting sintered ores to a blast furnace by a finished product belt conveyor, wherein the feeding amount of the batching chamber is the mixed material of iron ore powder, a flux, solid fuel, sintering internal return and blast furnace return ores and auxiliary materials, except that a small amount of water is added into quick lime and internal return high return in the flux, the other materials are all raw water without adding water, the mixed material with initial water content (4-5%) of the batching chamber enters the mixer and is fully added with water and uniformly mixed, the mixed material with target water content (7-8%) is conveyed into the ore tank and is ignited to be sintered by the distributing, the sintering machine operates at a certain machine speed m/min and a certain material layer thickness mm, and under the action of forced air draft and high temperature, the mixture undergoes a series of physicochemical changes to form sinter.
When the loading amount t/h of the batching chamber is dynamically balanced with the loading amount t/h of the sintering machine, the material level of a mixture ore tank is 60-80% in a proper range, the sintering machine continuously and stably operates, but when the moisture of the mixture deviates from a target value or the material layer resistance in the sintering process is changed due to the change of the proportion of iron ore powder and flux, the loading amount t/h of the batching chamber is balanced with the loading amount t/h of the sintering machine, and the material level of the mixture ore tank is low or even empty or high or even overflowed to push up the bin, so that the material waiting is suddenly stopped or the loading is suddenly stopped due to the heavy load of a batching system when the mixture ore tank is serious or the heavy load of the sintering machine system is suddenly stopped, and great influence is generated on the quality of sintering equipment and sintered ore products;
secondly, in the automatic sintering control design, the loading amount t/h of the batching chamber is not interlocked with the loading amount t/h of the sintering machine, the loading amount of the batching chamber is adjusted by a station according to the operating parameters (sintering negative pressure, the machine speed of the sintering machine, the thickness of a material layer, the sintering end point temperature, the end point position and the like) of the sintering machine, but the time of more than 35 minutes is needed from the beginning of the sintering of the material distribution ignition of the head of the sintering machine to the end of the sintering of the mixture, the loading amount of the sintering machine can be stored in a mixture ore tank for 6-8 minutes, the loading amount of the mixture ore tank is extremely easy to stick and the steam is extremely difficult to observe the material level of the ore tank, the station is difficult to judge the storage amount of the mixture ore tank, and the phenomenon that the material level of the mixture ore tank is suddenly low or suddenly high is often caused.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a dynamic equilibrium control method for the material level of a sintering mixture ore tank, which can ensure the dynamic equilibrium and stable operation of the material level of the mixture ore tank for a long time and avoid the unbalance of the mixture ore tank.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a dynamic equilibrium control method for the material level of a sinter mixture ore tank, which dynamically and evenly controls the material level of the sinter mixture ore tank by establishing an equivalent relation between the material loading amount of a batching chamber and the material loading amount of a sintering machine, particularly setting the allowable fluctuation range of the material loading amount of the sintering machine, and calculating to obtain the adjustment amount required by the material loading amount of the batching chamber along with the change of the sintering machine speed and the material layer thickness so as to realize the dynamic equilibrium of the material level of the sinter mixture ore tank;
the established equivalence relation is:
Q =VHBR（0.0582~0.0618）×[1-（X－X1）]
q is the feeding amount of the batching chamber, t/h;
v is the machine speed of the sintering machine, m/min;
h, the thickness of the sintering machine material layer is mm;
b, width of the inner edge of the sintering machine, m;
r-bulk specific gravity of the mixture, t/m3；
X-target moisture of mix,%;
X1-raw moisture of the batch chamber charge,%;
the equivalent relational formula is programmed to form a computer command and the computer command is input into an automatic sintering control system, and when the machine speed and the material layer thickness of the sintering machine change due to various reasons, the computer sends a command to a batching system to quickly adjust the instantaneous feeding amount and control the dynamic, balanced and stable operation of the material level of the mixed material and ore tank.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the dynamic equilibrium control method for the sintering mixture ore tank material level, the method uses a continuous belt type air draft sintering machine, the machine speed V is used for reflecting the horizontal running speed of the sintering machine, the material layer thickness H is used for reflecting the vertical sintering speed of the mixture, and the moisture X is used for reflecting the vertical sintering speed of the mixture1Is used for reflecting the original moisture of the material loading of the batching chamber, the moisture X is used for reflecting the target moisture of the mixture, the edge width B is used for reflecting the edge width in the sintering machine, and the specific gravity R is used for reflecting the inverse proportionReflecting the bulk specific gravity of the mixture.
Compared with the prior art, the dynamic equilibrium control method for the material level of the ore tank of the sintering mixture is applied to sintering production, can realize the dynamic equilibrium of the material loading amount of a batching chamber and the material loading amount of a sintering machine, ensures the long-term stable operation of a batching system and a sintering machine system, avoids the sudden heavy load shutdown phenomenon, not only protects equipment, but also improves the technical index of sintering production and improves economic benefit, and by summarizing production test data of a 265 square meter sintering machine, the strength of a sintering ore rotary drum is averagely improved by 0.13 percentage point, the internal return rate of sintering is reduced by 1.62 percentage points, the yield of sintering ore is improved by 4860 t/month, the processing cost of the sintering ore is measured and calculated according to 50 yuan/t, and the efficiency of a single 265 square meter sintering machine is created by 291.6 ten thousand yuan/year.
Drawings
FIG. 1 is a flow chart of the sintering process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the burdening is to mix iron ore powder, flux, solid fuel and circulating material with different components according to a certain proportion to form a mixture according to the requirements of sintering and blast furnaces;
mixing is a process of fully adding water to wet, uniformly mixing and granulating the mixed material in a mixer to form a mixed material with proper water content and uniform components;
the sintering is a process of distributing the mixed material on a sintering machine 6 through a distributing device (a shuttle distributor 1, a mixed material ore tank 2, a round roller feeder 4 and a multi-roller distributor 5), so that a uniform material surface 7 is formed in the sintering machine, the mixed material is ignited by an ignition furnace, and the mixed material is subjected to a series of physical and chemical changes under the forced air draft and high temperature action of a main exhaust fan, so that the sintered ore with certain strength and metallurgical performance is formed;
the sum of the feeding amounts (measured by an electronic belt scale) of each disk feeder of iron ore powder, flux, solid fuel and circulating material in the batching chamber is the feeding amount Q (t/h) of the batching chamber, the sintering machine has a certain material consumption W (t/h) at a certain machine speed V (m/min) and a certain material layer thickness H (mm), when the moisture of the mixture is proper and the air permeability and the resistance of the material layer of the sintering machine are stable, the sintering machine can use the feeding amount of the batching chamber in a balanced manner, the material level 3 of the mixture ore tank is kept stable, the batching system and the sintering machine system produce continuously in a balanced and stable manner, and when the feeding amount of the batching chamber is unbalanced with the material consumption of the sintering machine 6, the mixture ore tank or an empty bin or a top bin causes the sintering machine system to stop waiting for material or the batching system to stop feeding;
the application provides a dynamic equilibrium control method for the sintering mixture ore tank material level, which aims to establish an equivalent relational expression of 'material loading quantity Q of a batching chamber = material loading quantity W for a sintering machine', set an allowable fluctuation range (W +/-0.03) of the material loading quantity for the sintering machine, and obtain an adjustment quantity required by the material loading quantity of the batching chamber along with the change of the machine speed and the material layer thickness of the sintering machine through calculation so as to achieve the purpose of 3 dynamic equilibrium of the sintering mixture ore tank material level;
the continuous belt type air draft sintering machine is used for sintering, the machine speed V (m/min) reflects the horizontal running speed of the sintering machine, the material layer thickness H (mm) reflects the vertical sintering speed of a mixture, and the original water X of the feeding of a batching room1(%), target moisture of mixture X (%), width of inner edge of sintering machine B (m), and bulk specific gravity of mixture R (t/m)3) Establishing an equivalent relation:
ingredient compartment charge Q =60V × 0.001H × B × R × (0.97 to 1.03) × (1- (X-X1))
Namely: q = VHBR (0.0582-0.0618) X [1- (X-X1) ]
Q is the feeding amount of the batching chamber, t/h;
v is the machine speed of the sintering machine, m/min;
h, the thickness of the sintering machine material layer is mm;
b, width of the inner edge of the sintering machine, m;
r-bulk specific gravity of the mixture, t/m3；
X-target moisture of mix,%;
X1-raw moisture of the batch chamber charge,%;
the above relational expressions are programmed to form a computer command and input into the automatic sintering control system, when the machine speed and the material layer thickness of the sintering machine change due to various reasons, the computer sends a command to the batching system to quickly adjust the instantaneous feeding amount, and the dynamic balanced and stable operation of the material level of the mixed material ore tank can be ensured for a long time.
The dynamic equilibrium control method for the material level of the sintering mixture ore slot is applied to sintering production, and can realize the dynamic equilibrium of the material loading amount of a batching chamber and the material amount of a sintering machine, the batching system and the sintering machine system stably run for a long time, and the sudden heavy load shutdown phenomenon is avoided, so that equipment is protected, the sintering production technical index can be improved, and the economic benefit is improved, through summarizing production test data of a 265 square-meter sintering machine, the strength of a sintering ore rotary drum is averagely improved by 0.13 percent, the internal return rate of sintering is reduced by 1.62 percent, the yield of sintering ore is improved by 4860 t/month, the efficiency of a single 265 square-meter sintering machine is measured and calculated according to the processing cost of the sintering ore of 50 yuan/t, and the efficiency of the single 265 square-meter sintering machine is 291.6 ten thousand yuan/year.
Claims (2)
1. A dynamic equilibrium control method for the material level of a sinter mixture ore tank is characterized in that: the method comprises the steps of dynamically and uniformly controlling the material level of a sintering mixture ore tank by establishing an equivalent relation between the material loading amount of a batching chamber and the material loading amount of a sintering machine, specifically, setting an allowable fluctuation range of the material loading amount of the sintering machine, and calculating an adjustment amount required by the material loading amount of the batching chamber along with the change of the machine speed and the material layer thickness of the sintering machine to realize dynamic balance of the material level of the sintering mixture ore tank;
the established equivalence relation is:
Q =VHBR（0.0582~0.0618）×[1-（X－X1）]
q is the feeding amount of the batching chamber, t/h;
v is the machine speed of the sintering machine, m/min;
h, the thickness of the sintering machine material layer is mm;
b, width of the inner edge of the sintering machine, m;
r-bulk specific gravity of the mixture, t/m3；
X-target moisture of mix,%;
X1-raw moisture of the batch chamber charge,%;
the equivalent relational formula is programmed to form a computer command and the computer command is input into an automatic sintering control system, and when the machine speed and the material layer thickness of the sintering machine change due to various reasons, the computer sends a command to a batching system to quickly adjust the instantaneous feeding amount and control the dynamic, balanced and stable operation of the material level of the mixed material and ore tank.
2. The sinter mix ore tank level dynamic equilibrium control method as claimed in claim 1, wherein: the method uses a continuous belt type air draft sintering machine, the machine speed V is used for reflecting the horizontal running speed of the sintering machine, the material layer thickness H is used for reflecting the vertical sintering speed of a mixture, and the moisture X1The moisture X is used for reflecting the target moisture of the mixture, the edge width B is used for reflecting the edge width in the sintering machine, and the specific gravity R is used for reflecting the bulk specific gravity of the mixture.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851571A (en) * | 2006-03-09 | 2006-10-25 | 上海工程技术大学 | Material balance intelligent control system |
| CN103114199A (en) * | 2013-03-12 | 2013-05-22 | 攀钢集团攀枝花钢钒有限公司 | Starting-up production method of sintering machine |
| CN105046357A (en) * | 2015-07-15 | 2015-11-11 | 辽宁中新自动控制集团股份有限公司 | Material balance control model for return ore bunker in sintering system |
| CN110822909A (en) * | 2019-11-05 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Control method for balancing sintering machine table surface material distribution amount |
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- 2022-04-19 CN CN202210406714.7A patent/CN114625096A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851571A (en) * | 2006-03-09 | 2006-10-25 | 上海工程技术大学 | Material balance intelligent control system |
| CN103114199A (en) * | 2013-03-12 | 2013-05-22 | 攀钢集团攀枝花钢钒有限公司 | Starting-up production method of sintering machine |
| CN105046357A (en) * | 2015-07-15 | 2015-11-11 | 辽宁中新自动控制集团股份有限公司 | Material balance control model for return ore bunker in sintering system |
| CN110822909A (en) * | 2019-11-05 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Control method for balancing sintering machine table surface material distribution amount |
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