CN106706494A - Determination method of material column liquid permeability index in COREX smelter-gasifier - Google Patents
Determination method of material column liquid permeability index in COREX smelter-gasifier Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 14
- 230000035699 permeability Effects 0.000 title abstract description 5
- 239000000463 material Substances 0.000 title abstract 3
- 239000000571 coke Substances 0.000 claims abstract description 156
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims description 51
- 235000019580 granularity Nutrition 0.000 claims description 44
- 238000002309 gasification Methods 0.000 claims description 33
- 238000002844 melting Methods 0.000 claims description 32
- 230000008018 melting Effects 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000008187 granular material Substances 0.000 claims description 24
- 238000003556 assay Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 1
- 230000005619 thermoelectricity Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 4
- 229910052799 carbon Inorganic materials 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000008202 granule composition Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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Abstract
The invention relates to a determination method of a material column liquid permeability index in a COREX smelter-gasifier. The determination method comprises the following steps: 1) sampling: taking tuyere test samples on a central plane of a tuyere of the COREX smelter-gasifier from the tuyere to different positions of the center of the COREX smelter-gasifier through a tuyere sampling device along the radial direction of the COREX smelter-gasifier; coding the obtained tuyere test samples; 2) screening the tuyere test samples to separate out carbon coke/semi-coke, furnace dreg and iron; combining the carbon coke/semi-coke to form a tuyere carbon coke test sample and combining the furnace dreg to form a tuyere furnace dreg test sample; 3) determining the voidage epsilon and the pressure difference P of the tuyere carbon coke test sample, and the temperature strength Q of the tuyere furnace dreg test sample respectively through corresponding tests; 4) calculating according to a formula to obtain the liquid permeability index L of the tuyere test samples at different positions (wherein the formula is shown as the description). The determination method provided by the invention is high in operability and is simple and feasible; the determined material column liquid permeability index can be used for effectively evaluating the activity of a hearth of the COREX smelter-gasifier.
Description
Technical field
It is saturating the present invention relates to stock column in a kind of non-blast furnace ironmaking technical field, more particularly to a kind of COREX melting gasification furnaces
The assay method of liquidity index.
Background technology
Blast furnace iron-making process has the advantages that many other ironmaking equipments are incomparable, such as production scale is big, production efficiency is high,
Energy consumption is low, long service life, desulfurization performance are good and is suitable for production hot metal in steelmaking etc., therefore up to the present always as refining
The main production of iron.But blast furnace ironmaking there is also many unfavorable factors, and such as scale of investment is big, environmental pollution is serious, raw
Produce dumb etc., particularly its STRENGTH ON COKE production heavy dependence；The raising required with Environmental protection and coking coal resource
Worsening shortages, to use no or little coke and low CO2The non-blast furnace ironmaking technique of discharge is increasingly paid attention to, but at present only
The COREX techniques for having VAI to develop are unique new technologies for successfully realizing industrialized production in ironmaking technique of fusion and reduction.
Found during COREX melting gasification furnace actual productions, enter that half char strength that stove lump coal is cracked to form is not high, air port is burnt
Particle mean size is smaller, constrains the gas permeability of stock column in stove；Because COREX melting gasification furnaces air port uses pure oxygen air blast, air quantity
It is smaller, therefore cupola well activity is poor.
The method for weighing COREX melting gasification furnace Active hearth conditions at present is rarely reported, and on blast furnace crucibe activity
Evaluation depend on monitoring to blast furnace crucibe temperature mostly, to slag iron in the factor such as cupola well of other influences furnace cylinder working state
Mobility status, cokes in hearth characteristic etc. do not consider.
The content of the invention
The invention provides a kind of assay method of stock column transparent liquid sex index in COREX melting gasification furnaces, COREX is combined
The many factors such as slag iron flowing and semicoke/coke characteristic, design strong operability, simple and effective examination in melting gasification furnace cupola well
Proved recipe method, the stock column transparent liquid sex index for being determined can be used to the activity of effective evaluation COREX melting gasification furnace cupola wells.
In order to achieve the above object, the present invention is realized using following technical scheme：
The assay method of stock column transparent liquid sex index, comprises the following steps in a kind of COREX melting gasification furnaces：
1) sample, on the central plane of COREX melting gasification furnaces air port, along the radial direction of COREX melting gasification furnaces, from air port
Air port sample is taken by tuyere p robing device respectively to COREX melting gasification furnaces center diverse location, and acquired air port is tried
Sample is numbered；
2) screening is carried out to air port sample and isolates coke/semicoke, slag and iron, by coke therein/semicoke composition wind
Mouth coke specimen, air port slag sample is constituted by slag therein；
3) the voidage ε and pressure difference degree P of air port coke specimen, the temperature of air port slag sample are determined respectively by correspondence experiment
Degree intensity Q；
4) by formulaIt is calculated the transparent liquid sex index L of diverse location air port sample.
The assay method of the air port coke specimen voidage ε is as follows：
1) before air port coke specimen voidage is determined, first sieved, the selection wherein coke of granularity >=2.5mm
Particle group coke sample I, coke specimen I soaks more than 24h in water, is filled completely in the stomata for making coke in coke specimen I
Full water；Comprise the following steps that：
(1) measured quantity body product；
Pallet is placed on balance, is reset；Claim first measuring device weight；Then by measuring device topped up with water after, claim to obtain measuring device
With the weight of water；The difference of weight obtains final product the volume of measuring device divided by the density of water twice；
According to measuring device weight mAmount, topped up with water measuring device weight mIt is fullWith the proportion ρ of waterWater, amount of calculation body product：
(2) char volume, voidage are determined；
After coke specimen I after immersion is drained, it is fitted into measuring device and is compacted, measuring device weight of the record equipped with coke specimen I
Amount ma；Just flood whole coke specimens I to being added water in the measuring device equipped with coke specimen I, record measuring device weight m nowb；
According to VAmount、ma、mb, calculate volume shared by the particulate interspaces of coke specimen I：
Added water until filling it up with, record measuring device weight m now to measuring device relaying is continuousc；According to VAmount、maAnd mc, calculate coke examination
The volume of sample I：
According to VIt is emptyAnd VIt is burnt, calculate the voidage ε that coke specimen I is the air port coke granule of granularity >=2.5mmDetermine：
(3) voidage of air port coke specimen whole granularity is calculated；
, it is necessary to consider the influence of granularity ＜ 2.5mm coke granules when calculating the voidage of air port coke specimen whole granularity,
Therefore, the voidage ε of air port coke specimen whole granularity is calculated as follows：
εWhole particles of calculating=(1- χ %) × εDetermine-- formula 5
In formula, εWhole particles of calculatingRepresent the voidage of air port coke specimen whole granularity；χ % represent granularity ＜ 2.5mm coke
The percentage composition of particle.
The assay method of the pressure difference degree P of the air port coke specimen is as follows：
1) air port coke specimen pressure difference degree P is determined using pressure difference test device, the pressure difference test device is by mother tube, gas
Flowmeter, pressure gauge and U-tube hydraulic gage composition；Mother tube is used to contain air port coke specimen, its open top, and bottom passes through
Air inlet pipe connects external pressure gas container, and U-tube hydraulic gage is connected by escaping pipe；Air inlet pipe be provided with gas flowmeter and
Pressure gauge；
2) by air port coke specimen by particle size range packet composition coke specimen II, the granularity difference of each group coke specimen II
It is 2.5mm≤D ＜ 6mm, 6mm≤D ＜ 10mm, 10mm≤D ＜ 15mm；Each group coke specimen II is respectively put into mother tube
Row is determined；
3) the height H of coke granule in mother tube is determined first2, H2It is three average values of elevation measurement value；
4) gas is blasted to raw material bottom of the tube by air inlet pipe, reads the liquid level difference H of U-tube hydraulic gage both sides1, together
When recording manometer value, Δ p1；
5) above numerical value is brought into following equation：
In formula 6：
ε1Represent the voidage average value of each group coke specimen II；
ε2Represent the voidage of the whole granularities of coke specimen II；
de1Represent the average diameter of particles of each group coke specimen II；
de2Represent the average diameter of particles of the whole granularities of coke specimen II；
Represent the form factor average value of each group coke specimen II；
Represent the form factor of the whole granularities of coke specimen II；
Form factor refers to the surface area ratio of the surface area with aspherical particle of same volume spheric granules, also known as spherical
Degree；
Δ p is calculated by formula 62, by Δ p2Divided by 10mmH2O, makes dimensionless number, as air port coke
The pressure difference degree P of sample.
The assay method of the temperature strength Q of the air port slag sample is as follows：
1) measure of air port slag specimen temperature intensity is carried out using resistance-heated furnace；Thermocouple is provided with resistance-heated furnace
For measuring in-furnace temperature, the outer side of resistance-heated furnace is provided with video camera for being continuously shot air port slag sample molten state；
Thermocouple and video camera are connected with computer respectively；
2) air port slag sample is placed in mould the column for making diameter 5mm × 5mm, resistance is then put in and is added and hold stove
Middle heating；With the rising of fire box temperature, air port slag sample melted by heat, column height reduction；Column is highly dropped
Temperature when low 1/5 is defined as softening temperature, and temperature when column highly to be dropped to former height 4/5 is defined as flowing temperature
Degree；
3) after resistance-heated furnace in-furnace temperature is more than 1300 DEG C, video camera starts, and is spaced 2-3 seconds to air port slag sample slug
Shape body situation of change is continuously shot, and result is saved in computer；
4) ratio of the slagging temperature of slag and air port slag sample softening temperature when by COREX melting gasification furnace actual conditions
Value is defined as temperature strength I；The slagging temperature of slag and air port slag sample flowing during by COREX melting gasification furnace actual conditions
The ratio of temperature is defined as temperature strength II；Then temperature strength I is the temperature of slag sample with the average value of temperature strength II
Intensity Q.
Compared with prior art, the beneficial effects of the invention are as follows：
1) assay method is simple, easy to operate, it is easy to implement；
2) measurement result accurately and reliably, can be used as the foundation for judging COREX melting gasification furnace Active hearth conditions.
Brief description of the drawings
Fig. 1 is the schematic diagram of sampling process of the present invention.
Fig. 2 is the structural representation of pressure difference test device of the present invention.
Fig. 3 is the structural representation of resistance-heated furnace of the present invention.
Fig. 4 be in the embodiment of the present invention each group air port sample transparent liquid sex index and correspondence be detained iron than graph of a relation.
In figure：The gas flowmeter 6. of 2. air port of 1.COREX melting gasification furnaces 3. tuyere p robing groove, 4. mother tube 5. is pressed
The computer of 11. video camera of power table 7.U type pipe hydraulic gage 8. resistance-heated furnace, 9. coke specimen, II 10. thermocouples 12.
Specific embodiment
Specific embodiment of the invention is described further below in conjunction with the accompanying drawings：
The assay method of stock column transparent liquid sex index, comprises the following steps in a kind of COREX melting gasification furnaces of the present invention：
1) sample, as shown in figure 1, on the central plane of COREX melting gasification furnaces air port 2, along COREX melting gasification furnaces 1
Radial direction, air port sample is taken by tuyere p robing device 3 respectively from air port 2 to the center diverse location of COREX melting gasification furnaces 1, and
Acquired air port sample is numbered；
2) screening is carried out to air port sample and isolates coke/semicoke, slag and iron, by coke therein/semicoke composition wind
Mouth coke specimen, air port slag sample is constituted by slag therein；
3) the voidage ε and pressure difference degree P of air port coke specimen, the temperature of air port slag sample are determined respectively by correspondence experiment
Degree intensity Q；
4) by formulaIt is calculated the transparent liquid sex index L of diverse location air port sample.
The assay method of the air port coke specimen voidage ε is as follows：
1) before air port coke specimen voidage is determined, first sieved, the selection wherein coke of granularity >=2.5mm
Particle group coke sample I, coke specimen I soaks more than 24h in water, is filled completely in the stomata for making coke in coke specimen I
Full water；Comprise the following steps that：
(1) measured quantity body product；
Pallet is placed on balance, is reset；Claim first measuring device weight；Then by measuring device topped up with water after, claim to obtain measuring device
With the weight of water；The difference of weight obtains final product the volume of measuring device divided by the density of water twice；
According to measuring device weight mAmount, topped up with water measuring device weight mIt is fullWith the proportion ρ of waterWater, amount of calculation body product：
(2) char volume, voidage are determined；
After coke specimen I after immersion is drained, it is fitted into measuring device and is compacted, measuring device weight of the record equipped with coke specimen I
Amount ma；Just flood whole coke specimens I to being added water in the measuring device equipped with coke specimen I, record measuring device weight m nowb；
According to VAmount、ma、mb, calculate volume shared by the particulate interspaces of coke specimen I：
Added water until filling it up with, record measuring device weight m now to measuring device relaying is continuousc；According to VAmount、maAnd mc, calculate coke examination
The volume of sample I：
According to VIt is emptyAnd VIt is burnt, calculate the voidage ε that coke specimen I is the air port coke granule of granularity >=2.5mmDetermine：
(3) voidage of air port coke specimen whole granularity is calculated；
, it is necessary to consider the influence of granularity ＜ 2.5mm coke granules when calculating the voidage of air port coke specimen whole granularity,
Therefore, the voidage ε of air port coke specimen whole granularity is calculated as follows：
εWhole particles of calculating=(1- χ %) × εDetermine-- formula 5
In formula, εWhole particles of calculatingRepresent the voidage of air port coke specimen whole granularity；χ % represent granularity ＜ 2.5mm coke
The percentage composition of particle.
The assay method of the pressure difference degree P of the air port coke specimen is as follows：
1) determine air port coke specimen pressure difference degree P using pressure difference test device, as shown in Fig. 2 the pressure difference test device by
Mother tube 4, gas flowmeter 5, pressure gauge 6 and U-tube hydraulic gage 7 are constituted；Mother tube 4 is used to contain air port coke specimen, its
Open top, bottom connects external pressure gas container by air inlet pipe, and U-tube hydraulic gage 7 is connected by escaping pipe；Air inlet pipe
It is provided with gas flowmeter 5 and pressure gauge 6；
2) by air port coke specimen by particle size range packet composition coke specimen II, the granularity difference of each group coke specimen II
It is 2.5mm≤D ＜ 6mm, 6mm≤D ＜ 10mm, 10mm≤D ＜ 15mm；Each group coke specimen II is respectively put into mother tube 4
It is measured；
3) the height H of coke granule in mother tube 4 is determined first2, H2It is three average values of elevation measurement value；
4) gas is blasted to the bottom of mother tube 4 by air inlet pipe, reads the liquid level difference H of the both sides of U-tube hydraulic gage 71,
While the value, Δ p of recording manometer 61；
5) above numerical value is brought into following equation：
In formula 6：
ε1Represent the voidage average value of each group coke specimen II；
ε2Represent the voidage of the whole granularities of coke specimen II；
de1Represent the average diameter of particles of each group coke specimen II；
de2Represent the average diameter of particles of the whole granularities of coke specimen II；
Represent the form factor average value of each group coke specimen II；
Represent the form factor of the whole granularities of coke specimen II；
Form factor refers to the surface area ratio of the surface area with aspherical particle of same volume spheric granules, also known as spherical
Degree；
Δ p is calculated by formula 62, by Δ p2Divided by 10mmH2O, makes dimensionless number, as air port coke
The pressure difference degree P of sample.
The assay method of the temperature strength Q of the air port slag sample is as follows：
1) measure of the temperature strength of air port slag sample 9 is carried out using resistance-heated furnace 8；As shown in figure 3, resistance-heated furnace
Thermocouple 10 is provided with 8 and is provided with video camera 11 for being continuously shot air port for measuring in-furnace temperature, the outer side of resistance-heated furnace 8
Slag sample molten state；Thermocouple 10 and video camera 11 are connected with computer 12 respectively；
2) air port slag sample 9 is placed in mould the column for making diameter 5mm × 5mm, resistance is then put in and is added and hold
Heated in stove 8；With the rising of fire box temperature, the melted by heat of air port slag sample 9, column height reduction；Column is high
Temperature when degree reduces by 1/5 is defined as softening temperature, and temperature when column highly to be dropped to former height 4/5 is defined as flowing
Temperature；
3) after the in-furnace temperature of resistance-heated furnace 8 is more than 1300 DEG C, video camera starts, and interval 2-3 seconds is to air port slag sample 9
Column situation of change is continuously shot, and result is saved in computer；
4) the slagging temperature of slag and the softening temperature of air port slag sample 9 when by COREX melting gasification furnace actual conditions
Ratio is defined as temperature strength I；The slagging temperature of slag and air port slag sample 9 during by COREX melting gasification furnace actual conditions
The ratio of flowing temperature is defined as temperature strength II；Then temperature strength I is air port slag examination with the average value of temperature strength II
The temperature strength Q of sample.
In the present invention, it is according to Archimedes principle, in known vessel volume that the voidage ε of air port coke specimen is determined
In, consubstantiality ponding is excluded by added air intake vent coke specimen and determines its proportion and voidage.
There is certain hole on coke granule surface, during being reached before air port from after furnace roof addition, coke surface hole
Degree diminishes.Because granularity ＜ 2.5mm coke granules can float and are together lost with water on the water surface in voidage continuous mode, in addition
" and mud " phenomenon may occur, therefore only selection minimum particle size is the coke granule composition coke examination of 2.5mm in continuous mode
Sample.But due to containing more fine powder in the coke granule of granularity ＜ 2.5mm, can be several by the space between coke granule
It is fully filled with so that almost without space in the coke granule of granularity ＜ 2.5mm, so as to be affected greatly to the working of a furnace.Cause
This, the measure of air port coke specimen voidage still will consider the influence of the coke granule of granularity ＜ 2.5mm, and this is also regulation wind
The reason for mouth coke specimen voidage is whole granularity voidages.
In the present invention, the measure of the pressure difference degree P of air port coke specimen is the principle by experiment and Europe root (Ergun) formula
To calculate the pressure difference that diverse location gas in the sample of air port flows through coke.Its derivation is：
Larger in view of the flow velocity in COREX fusion and gasification furnace gas, motion state belongs to turbulent flow similar to blast furnace,
Therefore using every group of turbulent pressure difference of coke specimen II as the pressure difference of correspondence position.
Description gas is as follows by the Ergun formula of solid granule layer：
In formula：Δ p-- pressure difference, g/ (cms2)；
H-height, cm；
η-gas viscosity；
ω-gas flow rate, cm/s；
The voidage of ε-bulk cargo body (coke granule)；
The equivalent diameter of de-bulk cargo body (coke granule), cm；
The form factor (or sphericity) of-bulk cargo body (coke granule).
Under turbulent-flow conditions, formula (6-1) can be reduced to formula (6-2)：
Formula (6-3) gives expression of the pressure difference of air port coke specimen in a certain restriction particle size range under turbulent-flow conditions
Formula, subscript 1 represents the corresponding parameter of the air port coke specimen in a certain restriction particle size range in formula.
In the case where experimental condition is constant, the viscosity of superficial linear velocity in a column and gas all keeps constant in gas flow rate.All
Pressure difference of the granularity air port coke specimen under turbulent-flow conditions such as formula (6-4), subscript 2 represents the air port coke of whole granularities in formula
The corresponding parameter of sample.
Simultaneous formula (6-3) and formula (6-4), can obtain whole granularity air port coke specimen pressures under known turbulent-flow conditions
The poor and a certain relation limited in particle size range between the coke specimen pressure difference of air port, as shown in Equation 6.
In the present invention, the measure of air port slag specimen temperature intensity Q in the sample of air port is to start to soften according to slag just to have
There is certain mobility, can be considered as flowing freely completely when reaching flowing temperature, and the flowing of transparent liquid sex index and slag
Degree is relevant, and the numerical value of softening temperature and flowing temperature is more or less the same, and can take both average value as temperature strength Q values.
Following examples are implemented under premised on technical solution of the present invention, give detailed implementation method and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Do not mentionlet alone and bright be conventional method.
【Embodiment】
Certain factory COREX-3000 melting gasification furnaces are sampled after damping down, 5 groups are successively determined according to step of the present invention
The voidage ε and pressure difference degree P of the air port coke specimen taken in diverse location, and air port slag sample temperature strength Q；Through
It is calculated the transparent liquid sex index of diverse location air port sample；Its with it is corresponding delay iron than relation it is as shown in Figure 4.It is detained iron
Than the ratio for being the iron and air port sample gross weight screened out from the sample of air port.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (4)
1. in a kind of COREX melting gasification furnaces stock column transparent liquid sex index assay method, it is characterised in that comprise the following steps：
1) sample, on the central plane of COREX melting gasification furnaces air port, along the radial direction of COREX melting gasification furnaces, from air port extremely
COREX melting gasification furnaces center diverse location takes air port sample respectively by tuyere p robing device, and by acquired air port sample
It is numbered；
2) screening is carried out to air port sample and isolates coke/semicoke, slag and iron, coke therein/semicoke composition air port is burnt
Charcoal sample, air port slag sample is constituted by slag therein；
3) the voidage ε and pressure difference degree P of air port coke specimen are determined respectively by correspondence experiment, the temperature of air port slag sample is strong
Degree Q；
4) by formulaIt is calculated the transparent liquid sex index L of diverse location air port sample.
2. in a kind of COREX melting gasification furnaces according to claim 1 stock column transparent liquid sex index assay method, its feature
It is that the assay method of the air port coke specimen voidage ε is as follows：
1) before air port coke specimen voidage is determined, first sieved, the selection wherein coke granule of granularity >=2.5mm
Composition coke specimen I, coke specimen I soaks more than 24h in water, water is completely filled with the stomata for making coke in coke specimen I；
Comprise the following steps that：
(1) measured quantity body product；
Pallet is placed on balance, is reset；Claim first measuring device weight；Then by measuring device topped up with water after, claim to obtain measuring device and water
Weight；The difference of weight obtains final product the volume of measuring device divided by the density of water twice；
According to measuring device weight mAmount, topped up with water measuring device weight mIt is fullWith the proportion ρ of waterWater, amount of calculation body product：
(2) char volume, voidage are determined；
After coke specimen I after immersion is drained, it is fitted into measuring device and is compacted, measuring device weight m of the record equipped with coke specimen Ia；
Just flood whole coke specimens I to being added water in the measuring device equipped with coke specimen I, record measuring device weight m nowb；According to
VAmount、ma、mb, calculate volume shared by the particulate interspaces of coke specimen I：
Added water until filling it up with, record measuring device weight m now to measuring device relaying is continuousc；According to VAmount、maAnd mc, calculate coke specimen I
Volume：
According to VIt is emptyAnd VIt is burnt, calculate the voidage ε that coke specimen I is the air port coke granule of granularity >=2.5mmDetermine：
(3) voidage of air port coke specimen whole granularity is calculated；
, it is necessary to consider the influence of granularity ＜ 2.5mm coke granules when calculating the voidage of air port coke specimen whole granularity, because
This, the voidage ε of air port coke specimen whole granularity is calculated as follows：
εWhole particles of calculating=(1- χ %) × εDetermine-- formula 5
In formula, εWhole particles of calculatingRepresent the voidage of air port coke specimen whole granularity；χ % represent granularity ＜ 2.5mm coke granules
Percentage composition.
3. in a kind of COREX melting gasification furnaces according to claim 1 stock column transparent liquid sex index assay method, its feature
It is that the assay method of the pressure difference degree P of the air port coke specimen is as follows：
1) air port coke specimen pressure difference degree P is determined using pressure difference test device, the pressure difference test device is by mother tube, gas flow
Meter, pressure gauge and U-tube hydraulic gage composition；Mother tube is used to contain air port coke specimen, and its open top, bottom passes through air inlet
Pipe connects external pressure gas container, and U-tube hydraulic gage is connected by escaping pipe；Air inlet pipe is provided with gas flowmeter and pressure
Table；
2) by air port coke specimen by particle size range packet composition coke specimen II, the granularity of each group coke specimen II is respectively
2.5mm≤D ＜ 6mm, 6mm≤D ＜ 10mm, 10mm≤D ＜ 15mm；Each group coke specimen II is respectively put into mother tube to be carried out
Determine；
3) the height H of coke granule in mother tube is determined first2, H2It is three average values of elevation measurement value；
4) gas is blasted to raw material bottom of the tube by air inlet pipe, reads the liquid level difference H of U-tube hydraulic gage both sides1, while note
Record pressure gauge value, Δ p1；
5) above numerical value is brought into following equation：
In formula 6：
ε1Represent the voidage average value of each group coke specimen II；
ε2Represent the voidage of the whole granularities of coke specimen II；
de1Represent the average diameter of particles of each group coke specimen II；
de2Represent the average diameter of particles of the whole granularities of coke specimen II；
Represent the form factor average value of each group coke specimen II；
Represent the form factor of the whole granularities of coke specimen II；
Form factor refers to the surface area ratio of the surface area with aspherical particle of same volume spheric granules, also known as sphericity；
Δ p is calculated by formula 62, by Δ p2Divided by 10mmH2O, makes dimensionless number, as air port coke specimen
Pressure difference degree P.
4. in a kind of COREX melting gasification furnaces according to claim 1 stock column transparent liquid sex index assay method, its feature
It is that the assay method of the temperature strength Q of the air port slag sample is as follows：
1) measure of air port slag specimen temperature intensity is carried out using resistance-heated furnace；Thermocouple is provided with resistance-heated furnace to be used for
Measurement in-furnace temperature, the outer side of resistance-heated furnace is provided with video camera for being continuously shot air port slag sample molten state；Thermoelectricity
Idol and video camera are connected with computer respectively；
2) air port slag sample is placed in mould the column for making diameter 5mm × 5mm, be then put in resistance add hold in stove plus
Heat；With the rising of fire box temperature, air port slag sample melted by heat, column height reduction；By column height reduction 1/5
When temperature be defined as softening temperature, temperature when column highly to be dropped to former height 4/5 is defined as flowing temperature；
3) after resistance-heated furnace in-furnace temperature is more than 1300 DEG C, video camera starts, and is spaced 2-3 seconds to air port slag sample column
Situation of change is continuously shot, and result is saved in computer；
4) the slagging temperature of slag is determined with the ratio of air port slag sample softening temperature when by COREX melting gasification furnace actual conditions
Justice is temperature strength I；The slagging temperature of slag and air port slag sample flowing temperature during by COREX melting gasification furnace actual conditions
Ratio be defined as temperature strength II；Then temperature strength I is the temperature strength of slag sample with the average value of temperature strength II
Q。
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