CN107641675A - A kind of method for drafting of COREX gasification furnaces fuel metallurgical performance evolution - Google Patents
A kind of method for drafting of COREX gasification furnaces fuel metallurgical performance evolution Download PDFInfo
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Abstract
The invention belongs to non-blast furnace ironmaking technical field, and in particular to a kind of method for drafting of COREX gasification furnaces fuel metallurgical performance evolution, comprise the following steps：1) COREX gasification furnaces design parameter, crude fuel basic property and gasification furnace operating parameter are based on, using the modeling of CFD simulation softwards and numerical simulation, establishes fuel stock column high temperature relation；2) corresponding relation of the metallurgical performance numerical value of the temperature value of patch fuel and patch fuel under each simulation height value is established, and then draws patch fuel temperature performance relation curve；3) fuel stock column high temperature relation curve and patch fuel temperature performance relation curve are subjected to mapping association, using data processing software combination mapping software, obtain patch fuel height displacement performance development figure.This method can be directed to performance development of the different patch fuels in gasification furnace and carry out network analysis, help to carry out science recommendation to its adding proportion and Land use systems, ensure blast furnace stable smooth operation, Optimum utilization different fuel.
Description
Technical field
The invention belongs to non-blast furnace ironmaking technical field, and in particular to a kind of COREX gasification furnaces fuel metallurgical performance is drilled
Become the method for drafting of figure.
Background technology
Blast furnace iron-making process has reached its maturity by the development of centuries, but from the point of view of whole steel technological process, refining
Iron process is still energy consumption highest, a link of discharge capacity maximum, and the especially coking process in system and sintering circuit is
The major source of environmental pollution.In order to break away from dependence of the ironmaking processes to smelter coke, substitution pollution and energy consumption highest coking
Process and sintering circuit are to develop the fundamental driving force of non-blast furnace ironmaking.By exploration and practice for many years, COREX iron-smelting process is
The non-blast furnace ironmaking technique of industrialized production can uniquely be realized.COREX replaces smelter coke using lump coal, and lump coal is in gasification furnace
Interior performance quality directly affects gasification furnace stable smooth operation and pig iron cost, therefore, grasps the smelting in gasification furnace of different patch fuels
Golden performance development figure is smelted most important to COREX.This patent establishes a kind of COREX gasification furnaces fuel metallurgical performance and developed
The method for drafting of figure, help to analyze consumption process of the different patch fuels in gasification furnace, to patch fuel adding proportion and
Land use systems carry out the recommendation of science, on the basis of ensureing COREX stable smooth operations, the different block combustions of Optimum utilization to greatest extent
Material.
The content of the invention
For different patch fuels, consumption process parsing and optimization in gasification furnace use problem to the present invention, there is provided a kind of
The method for drafting of COREX gasification furnace fuel metallurgical performance evolutions.
Technical scheme provided by the present invention is as follows：
A kind of method for drafting of COREX gasification furnaces fuel metallurgical performance evolution, comprises the following steps：
1) COREX gasification furnaces design parameter, crude fuel basic property and gasification furnace operating parameter are based on, is simulated using CFD
Software modeling and numerical simulation, the temperature of gasification furnace fuel stock column is generated with the change curve of fuel stock column height, generates gas
Change the content of each component in furnace atmosphere with the change curve of fuel stock column height, generate different high in gasification furnace fuel stock column
Spend cross section pressure with fuel stock column height change curve, obtain fuel stock column height value and corresponding height under fuel material
The CFD simulation content values and corresponding height of each component in gasification furnace atmosphere under the CFD analog temperatures value of post, corresponding height
Under fuel stock column cross section CFD simulated pressure values corresponding relation, and draw fuel stock column height-temperature curve,
Draw fuel stock column height-atmosphere component relationship curve, draw fuel stock column height-pressure relationship plot.
Described COREX gasification furnaces design parameter include the height of gasification furnace furnace chamber, the vault diameter of furnace chamber, shaft angle,
Cupola well diameter and air port number and air ports size.
The composition and the composition of size distribution and carbon-containing fuel of described crude fuel basic property including iron-containing charge and
Size distribution.
Described gasifier operation parameter includes yield, ton iron enters stove iron-containing charge, coal ratio, coke ratio, oxygen enrichment percentage, secondary richness
Oxygen rate, iron-containing charge charging temperature, fuel charging temperature, oxygen charging temperature, stockline, ore deposit batch and coke (per) charge.
Modeled using CFD simulation softwards and COREX gasification furnaces can be emulated based on above-mentioned parameter.
Described gasification furnace atmosphere includes CO, CO2、N2、H2And H2O。
2) each relation curve obtained based on step 1), with regard to multiple CFD simulations height values of fuel stock column, obtains each mould
The CFD simulation content values and phase of each component in the corresponding CFD analog temperatures value of plan height value, corresponding gasification furnace atmosphere
The CFD simulated pressure values in the cross section answered, and simulated experiment is carried out to patch fuel operating mode in multifunctional high-temperature stove, simulation is each
CFD analog temperatures value under described CFD simulation height values, in gasification furnace atmosphere each component CFD simulation content values with
And the CFD simulated pressure values in cross section are tested, experiment terminates the metallurgical performance of rear sampling analysis patch fuel, establishes each mould
The corresponding relation of the metallurgical performance numerical value of the temperature value of patch fuel and patch fuel under plan height value, and then draw block combustion
Material temperature degree-property relationship curve.It is anti-that metallurgical performance numerical value includes fuel thermal stability index, mechanical fuel intensity index and fuel
Answer sex index.
Patch fuel heat endurance is to investigate its index for keeping its block performance after high temperature pyrolysis in gasification furnace.More work(
Can before high temperature furnace experiment by sample preparation into 20-30mm, experiment is passed through nitrogen after terminating, after furnace is reduced to room temperature,
Take out laboratory sample and weigh m0.Then with sample after 20mm sieve screen experiments, record oversize quality m+20.Patch fuel
Thermal stability index TS calculation formula be：
In formula, m0Represent patch fuel quality before testing, unit g；m+20Represent block of the size more than 20mm after testing
Shape quality of fuel, unit g.
Patch fuel mechanical strength is to investigate the ability of patch fuel resistance furnace charge attrition crushing, using sieve plus rotary drum to more
Patch fuel after the experiment of function high temperature furnace carries out intensity detection.Broken to preferably simulate patch fuel in stove by ore
It is bad, add pellet when rotary drum.It is 1.5 that the weight ratio of pelletizing and patch fuel is set in experimentation, that is, is selected
Patch fuel after the experiment of 50g multifunctional high-temperatures stove mixes with 75g pelletizings to be put into sieve and adds rotary drum, and the rotating speed of rotary drum is 53rad/
Min, rotation time are respectively 5min, 10min, 15min, 20min and 25min.Screening is more than more than 10mm bulks respectively after turning
Fuel simultaneously records.Patch fuel mechanical strength BI adds rotary drum to be measured using sieve, and BI calculation formula is as follows：
In formula, m0Patch fuel quality before expression rotary drum, unit g；m5Size is more than 10mm's after representing rotary drum 5min
The quality of patch fuel, unit g；m10The quality of patch fuel of the size more than 10mm, unit g after expression rotary drum 10min；
m15The quality of patch fuel of the size more than 10mm, unit g after expression rotary drum 15min；m20Size after expression rotary drum 20min
The quality of patch fuel more than 10mm, unit g；m25The matter of patch fuel of the size more than 10mm after expression rotary drum 25min
Amount, unit g.
Patch fuel reactivity is to investigate the wear rate of its different zones in gasification furnace.Patch fuel reactivity R0.5
Tested using synthesis thermal analyzer.The patch fuel sample preparation after the preceding experiment by multifunctional high-temperature stove is tested into 200-
Grade between 300 mesh, and dried 2 hours in 40 DEG C of drying baker.Take 10mg samples evenly laid out in crucible, with 20
DEG C/min heating rate rises to 1000 DEG C, CO2Gas flow is 100ml/min.Patch fuel reactivity R0.5Using Thermal Synthetic
Analyzer is tested, R0.5Calculation formula it is as follows：
R0.5=0.5/t0.5 (3)
In formula, t0.5For conversion ratio at 0.5 corresponding reaction time, unit s.
Described multifunctional high-temperature stove is simulation patch fuel in the device of gasification furnace internal work environment, can use Wuhan
The multifunctional high-temperature stove WUST-001 that University of Science and Technology develops jointly with Anshan S.Y.D Science＆Technology Co., Ltd..On multifunctional high-temperature stove
Portion can place load, and to the squeezing action of lump coal, bottom is passed through reducibility gas, investigates patch fuel in reproducibility simulation stock column
Pyrolysis behavior in atmosphere；Heating element uses Si-Mo rod in stove, and furnace shell is using cooling water cooling；Stove maximum operating temperature is
1600 DEG C, highest heating rate is up to 15 DEG C/min.Operating voltage is 220V/50Hz, peak power 140kW；Gas flow
For 1l/min, nitrogen is switched to cool down after experiment terminates, until furnace body temperature is down to room temperature.
3) the patch fuel temperature for obtaining fuel stock column height-temperature curve that step 1) obtains with step 2)-
Property relationship curve carries out mapping association, using data processing software combination mapping software, obtains patch fuel height displacement-property
Can evolution.Data processing can use Origin data processing softwares, and mapping software can use CAD mapping softwares.
Patch fuel height displacement-performance development the figure is included along arch roof of gasification furnace feeding mouth to bottom inlet horizontal line
Between fuel the thermal stability index of different height, mechanical strength index and reactivity indexes differentiation curve.
The beneficial effects of the invention are as follows：This method considers conduct of the fuel in COREX gasification furnaces and temperature, pressure, gas
The mapping relations of atmosphere, the metallurgical performance (heat endurance, mechanical strength, reactivity) for decline stage that analyzes fuel in gasification furnace
Change, it is proposed that the method for drafting of the COREX gasification furnace fuel metallurgical performance evolutions of complete set.The present invention can be directed to
Performance development of the different fuel in gasification furnace carries out network analysis, helps to carry out science to its adding proportion and Land use systems
Recommendation, on the basis of ensureing blast furnace stable smooth operation, Optimum utilization different fuel to greatest extent.It this method solve different combustions
Expect the contrast problem of the deterioration process in COREX gasification furnaces, while this method can be used for block combustion in blast furnace and other shaft (tower) furnaces
Expect the determination of performance development process.
Brief description of the drawings
Fig. 1 is the technology of the present invention route schematic diagram.
Fig. 2 is the stock column temperature variation curve in gasification furnace.
Fig. 3 is the atmosphere change curve in gasification furnace.
Fig. 4 is a kind of patch fuel metallurgical performance evolution in COREX gasification furnaces.
Embodiment
In order that the object, technical solution and advantage of invention are more clearly understood, the original below in conjunction with accompanying drawing to the present invention
Reason and feature are described, and the given examples are served only to explain the present invention, is not intended to limit the scope of the present invention.In addition, below
As long as it is mutual not form conflict can each other for involved technical characteristic in described each embodiment of the invention
Combination.
On the contrary, the present invention covers any replacement done in the spirit and scope of the present invention being defined by the claims, repaiied
Change, equivalent method and scheme.Further, in order that the public has a better understanding to the present invention, below to the thin of the present invention
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
Description can also understand the present invention completely.
Embodiment
The drafting of patch fuel metallurgical performance evolution in COREX gasification furnaces
Step 1: COREX gasification furnaces design parameter, crude fuel basic property and gasification furnace operating parameter are based on, using CFD
Simulation softward models and numerical simulation, generates the temperature of gasification furnace fuel stock column with the change curve of fuel stock column height, raw
The content of each component is generated in gasification furnace fuel stock column not with the change curve of fuel stock column height into gasification furnace atmosphere
With height cross section pressure with fuel stock column height change curve, obtain fuel stock column height value and corresponding height under fire
Expect the CFD simulation content values and accordingly of each component in the gasification furnace atmosphere under the CFD analog temperatures value of stock column, corresponding height
The corresponding relation of the CFD simulated pressure values in the fuel stock column cross section under height, and draw fuel stock column height-temperature relation song
Line, draw fuel stock column height-atmosphere component relationship curve, draw fuel stock column blast furnace-pressure relationship plot.COREX gasifies
Stove design parameter includes the height of gasification furnace furnace chamber, the vault diameter of furnace chamber, shaft angle, cupola well diameter and air port number and air port
Size.Crude fuel basic property includes the composition and the composition and size distribution of size distribution and carbon-containing fuel of iron-containing charge.
Gasifier operation parameter includes yield, ton iron enters stove iron-containing charge, coal ratio, coke ratio, oxygen enrichment percentage, secondary oxygen enrichment percentage, iron-containing charge
Charging temperature, fuel charging temperature, oxygen charging temperature, stockline, ore deposit batch and coke (per) charge.Gasification furnace atmosphere includes CO, CO2、N2、
H2And H2O。
Step 2: each relation curve obtained based on step 1, with regard to multiple CFD simulations height values of fuel stock column, is obtained
Take the CFD simulation content values of each component in the corresponding CFD analog temperatures value of each simulation height value, corresponding gasification furnace atmosphere
And the CFD simulated pressure values in corresponding cross section, and gasification furnace CFD is carried out to patch fuel operating mode in multifunctional high-temperature stove
Numerical simulation, simulate CFD analog temperatures value under each described CFD simulation height values, each component in gasification furnace atmosphere
CFD simulates content value and the CFD simulated pressure values in cross section are tested, and experiment terminates the smelting of rear sampling analysis patch fuel
Golden performance, carry out the detection of multizone patch fuel metallurgical performance, establish under each simulation height value the temperature value of patch fuel with
The corresponding relation of the metallurgical performance numerical value of patch fuel, and then draw patch fuel temperature-property relationship curve.
Fuel thermal stability index, mechanical fuel intensity index and fuel reaction sex index.
The thermal stability index TS of patch fuel is calculated by below equation：
In formula, m0Represent patch fuel quality before testing, unit g；m+20Represent block of the size more than 20mm after testing
Shape quality of fuel, unit g.
Patch fuel mechanical strength BI adds rotary drum to be measured using sieve, and BI calculation formula is as follows：
In formula, m0Patch fuel quality before expression rotary drum, unit g；m5Size is more than 10mm's after representing rotary drum 5min
The quality of patch fuel, unit g；m10The quality of patch fuel of the size more than 10mm, unit g after expression rotary drum 10min；
m15The quality of patch fuel of the size more than 10mm, unit g after expression rotary drum 15min；m20Size after expression rotary drum 20min
The quality of patch fuel more than 10mm, unit g；m25The matter of patch fuel of the size more than 10mm after expression rotary drum 25min
Amount, unit g.
Patch fuel reactivity R0.5Tested using synthesis thermal analyzer, R0.5Calculation formula it is as follows：
R0.5=0.5/t0.5 (3)
In formula, t0.5For conversion ratio at 0.5 corresponding reaction time, unit s.By multifunctional high-temperature stove before experiment
Patch fuel sample preparation after experiment is dried 2 hours into the grade between 200-300 mesh in 40 DEG C of drying baker.Take
10mg samples are evenly laid out in crucible, rise to 1000 DEG C with 20 DEG C/min heating rate, CO2Gas flow is 100ml/
min。
Step 3: the patch fuel that the fuel stock column height-temperature curve that step 1 obtains is obtained with step 2
Temperature-property relationship curve carries out mapping association, using Origin data processing software combination CAD mapping softwares, obtains fuel
Height displacement-performance development figure.Fuel height displacement-performance development figure is included along arch roof of gasification furnace feeding mouth to bottom air port water
Differentiation curve of the fuel in the thermal stability index of different height, mechanical strength index and reactivity indexes between horizontal line.
Embodiment
The technology path of the present embodiment is as shown in Figure 1.Patch fuel working environment determination is carried out first, is then carried out more
Region bulk fuel performance detection, finally draws patch fuel height displacement-performance development figure.
Based on COREX gasification furnaces design parameter, crude fuel basic property, gasifier operation parameter, using CFD simulation softwards
Modeling, numerical simulation, the temperature variation curve of furnace charge inside gasification furnace, the atmosphere regularity of distribution in gasification furnace are obtained respectively as schemed
Shown in 2 and Fig. 3.
Using multifunctional high-temperature stove simulate patch fuel in gasification furnace it is descending during temperature, atmosphere, pressure change,
The metallurgical performance result (heat endurance, mechanical strength, reactivity) of laboratory sample under sampling analysis different condition, as shown in table 1.
The metallurgical performance result of the laboratory sample of table 1
With reference to fuel stock column height-temperature relation song and patch fuel temperature-property relationship curve, fuel height position is drawn
Shifting-performance development figure, as shown in Figure 4.Performance development of the different fuel in gasification furnace can be directed to by the figure and carry out system
Analysis, the recommendation of science is carried out to its adding proportion and Land use systems, on the basis of ensureing blast furnace stable smooth operation, to greatest extent
Optimum utilization different fuel.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (5)
1. a kind of method for drafting of COREX gasification furnaces fuel metallurgical performance evolution, it is characterised in that comprise the following steps：
1) COREX gasification furnaces design parameter, crude fuel basic property and gasification furnace operating parameter are based on, using CFD simulation softwards
Modeling and numerical simulation, the temperature of gasification furnace fuel stock column is generated with the change curve of fuel stock column height, generates gasification furnace
It is horizontal to generate different height in gasification furnace fuel stock column with the change curve of fuel stock column height for the content of each component in interior atmosphere
The pressure of section obtains the height value of fuel stock column and fuel stock column under corresponding height with the change curve of fuel stock column height
The CFD simulation content values of the corresponding relation of CFD analog temperature values, the height value of fuel stock column and each component in gasification furnace atmosphere
Corresponding relation and fuel stock column height value and fuel stock column cross section CFD simulated pressure values corresponding relation, and paint
Fuel stock column height-temperature curve processed, draw fuel stock column height-atmosphere component relationship curve, draw fuel stock column height
Degree-pressure relationship plot；
2) each relation curve obtained based on step 1), for multiple CFD simulations height values of fuel stock column, obtains each simulation
With the CFD simulation content values of each component in the corresponding CFD analog temperatures value of height value, corresponding gasification furnace atmosphere and accordingly
Cross section CFD simulated pressure values, and in multifunctional high-temperature stove to patch fuel operating mode carry out simulated experiment, simulate each institute
CFD analog temperatures value under the CFD simulation height values stated, in gasification furnace atmosphere the CFD simulation content values of each component and
The CFD simulated pressure values in cross section are tested, and experiment terminates the metallurgical performance of rear sampling analysis patch fuel, establishes each simulation
With the temperature value of patch fuel under height value and the corresponding relation of the metallurgical performance numerical value of patch fuel, and then draw patch fuel
Temperature-property relationship curve；
3) the patch fuel temperature-performance for obtaining the fuel stock column height-temperature curve that step 1) obtains with step 2)
Relation curve carries out mapping association, using data processing software combination mapping software, obtains patch fuel height displacement-performance and drills
Become figure.
2. the method for drafting of COREX gasification furnaces fuel metallurgical performance evolution according to claim 1, its feature exist
In：
Described COREX gasification furnaces design parameter includes the height of gasification furnace furnace chamber, vault diameter, shaft angle, the cupola well of furnace chamber
Diameter and air port number and air ports size；
Described crude fuel basic property includes the composition and the composition and granularity of size distribution and carbon-containing fuel of iron-containing charge
Distribution；
Described gasifier operation parameter includes yield, ton iron and enters stove iron-containing charge, coal ratio, coke ratio, oxygen enrichment percentage, secondary oxygen-enriched
Rate, iron-containing charge charging temperature, fuel charging temperature, oxygen charging temperature, stockline, ore deposit batch and coke (per) charge；
Described gasification furnace atmosphere includes CO, CO2、N2、H2And H2O。
3. the method for drafting of COREX gasification furnaces fuel metallurgical performance evolution according to claim 1, its feature exist
In：The metallurgical performance numerical value includes fuel thermal stability index, mechanical fuel intensity index and fuel reaction sex index.
4. the method for drafting of COREX gasification furnaces fuel metallurgical performance evolution according to claim 3, its feature exist
In：
In step 2), the thermal stability index TS of patch fuel calculation formula is：
<mrow>
<mi>T</mi>
<mi>S</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>m</mi>
<mn>0</mn>
</msub>
<mo>-</mo>
<msub>
<mi>m</mi>
<mrow>
<mo>+</mo>
<mn>20</mn>
</mrow>
</msub>
</mrow>
<msub>
<mi>m</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula, m0Represent patch fuel quality before testing, unit g；m+20Size is fired more than the block of 20mm after representing experiment
The quality of material, unit g；
In step 2), the mechanical strength BI of the patch fuel adds rotary drum to be measured using sieve, and BI calculation formula is as follows：
<mrow>
<mi>B</mi>
<mi>I</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mfrac>
<mrow>
<mo>(</mo>
<msub>
<mi>m</mi>
<mn>5</mn>
</msub>
<mo>+</mo>
<msub>
<mi>m</mi>
<mn>25</mn>
</msub>
<mo>)</mo>
</mrow>
<mn>2</mn>
</mfrac>
<mo>+</mo>
<msub>
<mi>m</mi>
<mn>10</mn>
</msub>
<mo>+</mo>
<msub>
<mi>m</mi>
<mn>15</mn>
</msub>
<mo>+</mo>
<msub>
<mi>m</mi>
<mn>20</mn>
</msub>
</mrow>
<mrow>
<mn>4</mn>
<msub>
<mi>m</mi>
<mn>0</mn>
</msub>
</mrow>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula, m0Patch fuel quality before expression rotary drum, unit g；m5Size is more than 10mm bulk after expression rotary drum 5min
Quality of fuel, unit g；m10The quality of patch fuel of the size more than 10mm, unit g after expression rotary drum 10min；m15
The quality of patch fuel of the size more than 10mm, unit g after expression rotary drum 15min；m20Size is more than after representing rotary drum 20min
The quality of 10mm patch fuel, unit g；m25The quality of patch fuel of the size more than 10mm, single after expression rotary drum 25min
Position is g；
In step 2), the reactive R of the patch fuel0.5Tested using synthesis thermal analyzer, R0.5Calculation formula such as
Under：
R0.5=0.5/t0.5 (3)
In formula, t0.5For conversion ratio at 0.5 corresponding reaction time, unit s.
5. the method for drafting of COREX gasification furnaces fuel metallurgical performance evolution according to claim 4, its feature exist
In：Patch fuel height displacement-performance development the figure includes firing along arch roof of gasification furnace feeding mouth between the inlet horizontal line of bottom
Expect the differentiation curve of the thermal stability index of different height, mechanical strength index and reactivity indexes.
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| US11880189B2 (en) | 2020-09-29 | 2024-01-23 | Siemens Aktiengesellschaft | Method and apparatus for optimizing gasifier model |
| CN114058749A (en) * | 2021-11-29 | 2022-02-18 | 山西晋煤集团技术研究院有限责任公司 | Method for researching degradation of smokeless lump coal in blast furnace |
| CN114058749B (en) * | 2021-11-29 | 2023-02-10 | 山西晋煤集团技术研究院有限责任公司 | Method for researching degradation of smokeless lump coal in blast furnace |
| CN115266794A (en) * | 2022-07-29 | 2022-11-01 | 中国核动力研究设计院 | UO after LOCA high-temperature irradiation2Pore evolution behavior acquisition method |
| CN115266794B (en) * | 2022-07-29 | 2024-06-04 | 中国核动力研究设计院 | UO after LOCA high-temperature irradiation2Air hole evolution behavior acquisition method |
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