CN110205420A - High calcium bituminous coal based on ash fusion characteristic is used for the optimization method of blast furnace blowing - Google Patents
High calcium bituminous coal based on ash fusion characteristic is used for the optimization method of blast furnace blowing Download PDFInfo
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- 239000002802 bituminous coal Substances 0.000 title claims abstract description 61
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000011575 calcium Substances 0.000 title claims abstract description 50
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000007664 blowing Methods 0.000 title claims abstract description 47
- 230000004927 fusion Effects 0.000 title claims abstract description 31
- 238000005457 optimization Methods 0.000 title claims abstract description 22
- 239000003245 coal Substances 0.000 claims abstract description 65
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003830 anthracite Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 6
- 239000002956 ash Substances 0.000 claims description 47
- 239000002817 coal dust Substances 0.000 claims description 45
- 239000000523 sample Substances 0.000 claims description 25
- 239000010883 coal ash Substances 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 210000001015 abdomen Anatomy 0.000 claims description 6
- 238000000921 elemental analysis Methods 0.000 claims description 5
- 239000002360 explosive Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000006101 laboratory sample Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 16
- 238000002347 injection Methods 0.000 abstract description 13
- 239000007924 injection Substances 0.000 abstract description 13
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000008092 positive effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/04—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of melting point; of freezing point; of softening point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present invention relates to the optimization methods that a kind of high calcium bituminous coal based on ash fusion characteristic is used for blast furnace blowing, include the following steps: S101: measuring the basic characteristic of high calcium bituminous coal first；S102: and then the blowing process characteristic of the measurement high calcium bituminous coal, and feasibility is carried out to the high calcium bituminous coal and is determined；S103: being that tetra- kinds of ratios of 5:5,6:4,7:3,8:2 are mixed according to the proportion of anthracite and bituminous coal, and characteristic is melted to the ash of mixed coal and is measured, selection meets that cost performance under the conditions of the suitable volatile matter of needs of production is high, ash content softening temperature is greater than 1250 DEG C of mixed coal scheme.High calcium bituminous coal based on ash fusion characteristic of the invention is used for the optimization method of blast furnace blowing, new thinking can be not only provided for the coal blending optimizing of blast furnace PCI technology, expand the resource of iron and steel enterprise's pulverized coal injection into blast furna, there is positive effect to the high-value-use of low-order coal simultaneously, coal enterprise's upgrading synergy is pushed, brings two-win for iron and steel enterprise and coal enterprise.
Description
Technical field
The present invention relates to the optimization methods that a kind of high calcium bituminous coal based on ash fusion characteristic is used for blast furnace blowing.
Background technique
Injection of Large Quantity of Coal Powder In B. F technology is to develop one of the strategic technology of China's steel and iron industry.Current Coal Resources valence
Lattice go up, and the price difference between coal tar still remains, and to be blown a large amount of and cheap coal dusts instead of the coke of price costly, reach
To cost is reduced, the purpose of yield is improved, is the important channel for developing ironmaking production, there is good economic benefit.
Coal resources in China rich reserves, but high-quality coal resource but be becoming tight by day, domestic each iron and steel enterprise is careful
Know the importance utilized to blast furnace injection coal resource synthetic development.For anthracite, bituminous coal is the most significant special
Point is that flammability is good, and calorific value is lower, and volatile matter content is higher.From the sixties in last century, China has begun trial blast furnace blowing
Bituminous coal, bituminous coal and anthracite mixed injection technique are very mature at present.Due to blowing anthracite resource growing tension, because
This, in the long run, anthracite price will be stepped up, and improve pulverized coal injection into blast furna metabituminous coal ratio, the bituminous coal for selecting cost performance high
It is of great significance for blast furnace blowing for reducing injection coal cost,
Refreshing east coal group is the world's largest underground mine, and annual capacity by market, is provided up to 200,000,000 tons, but under new normality
The restriction of source and national policy, production capacity can not increase without limitation, and promote upgrading synergy, produce high attachment value coal product, be to work as
One of the pressing problem that the preceding eastern coal group of mind faces.Refreshing east high calcium bituminous coal belongs to Jurassic Coal, and degree of metamorphism is lower, has low
Ash, low-sulfur, the high feature of CaO content in low-phosphorous and ash content, and calorific value is higher with respect to other bituminous coal, is highly suitable for blast furnace spray
It blows.Meanwhile compared with the thermal coal for being used as power generation, mind east high calcium bituminous coal is mentioned for scalable product structure after blast furnace blowing
High product price (produce 10000000 tons of injection coals per year about at 100~200 yuan/ton and bring at present by the price difference of injection coal and thermal coal
Profit increase just up to 1,000,000,000 or more), facilitate the increase of the performance of enterprises.But due to the coal ash melting of refreshing eastern high calcium bituminous coal
Characteristic is poor, and ash fusion point is low, and for be easy to causeing air port slagging when blast furnace blowing, refreshing eastern high calcium bituminous coal is being sprayed in present steel enterprise
Evaluation during blowing is unclear, and the optimization method to the high calcium bituminous coal based on ash fusion characteristic for blast furnace blowing is unknown
Really, popularization of the high calcium bituminous coal for blast furnace blowing is greatly limited.
Summary of the invention
An object of the present invention is to provide a kind of high calcium bituminous coal based on ash fusion characteristic for blast furnace blowing
Optimization method.
A kind of high calcium bituminous coal based on ash fusion characteristic of the invention is used for the optimization method of blast furnace blowing, including as follows
Step: the basic characteristic of high calcium bituminous coal S101: is measured first；S102: and then the blowing process characteristic of the measurement high calcium bituminous coal,
And feasibility is carried out to the high calcium bituminous coal and is determined；S103: being 5:5,6:4,7:3,8:2 tetra- according to the proportion of anthracite and bituminous coal
Kind ratio is mixed, and is melted characteristic to the ash of mixed coal and be measured, and selection meets the suitable volatilization slitting of needs of production
Cost performance height, ash content softening temperature are greater than 1250 DEG C of mixed coal scheme under part.
High calcium bituminous coal based on ash fusion characteristic of the invention is used for the optimization method of blast furnace blowing, can be not only height
The coal blending optimizing of furnace coal spraying process provides new thinking, expands the resource of iron and steel enterprise's pulverized coal injection into blast furna, while to low-order coal
High-value-use has positive effect, pushes coal enterprise's upgrading synergy, brings two-win for iron and steel enterprise and coal enterprise.
In addition, the above-mentioned high calcium bituminous coal based on ash fusion characteristic of the present invention is used for the optimization method of blast furnace blowing, also
It can have following additional technical characteristic:
Further, the step S101 is specifically included: S1011: to the moisture of high calcium bituminous coal, ash content, volatile matter and being consolidated
Determine carbon to be measured, wherein remaining experiment is completed under dry base, simultaneously in addition to determination of moisture is completed under air-dried basis
Measure the calorific value of coal dust sample；S1012: elemental analysis is carried out for high calcium bituminous coal using intelligent elemental analyser；S1013:
Analysis measurement is carried out using coal dust ash component of the Xray fluorescence spectrometer to high calcium bituminous coal.
Further, the blowing process characteristic of high calcium bituminous coal described in the step S102 specifically includes: Kazakhstan grindability
Index, explosibility of pulverized coal, coal dust mobility and floodability, coal dust coal ash meltbility and caking property.
Further, the Hardgrove grind ability index detection includes the following steps: to clean up the grinding groove of coal pulverizer,
The steel ball that 8 diameters are 1 cun is placed in grinding trench bottom, then coal dust sample is equably spread out in around steel ball, it will be with square hole
Abrasive disk is covered on ball, and the rotary shaft lower end face abrasive disk square hole under ballast, the screw by grinding groove edge will be whole
A grinding system is fixed, and ballast is all concentrated on the steel ball of abrasive disk covering, then counter is transferred to 0, starts coal-grinding
Machine, abrasive disk revolution 18r/min~22r/min, time 2min~4min count 55 turns~65 turns, then take out sample, be put into
Be sieved 8min~12min in the sieve of the aperture 0.074mm and on vibration screening machine, is re-weighed calculating, and each sample repeats detection 3 times,
Wherein, the quality of coal dust sample is 50g, and granularity is 0.63mm~1.25mm, Kazakhstan grindability calculation formula are as follows:
K=13+6.93 × (50-m) formula one；
In formula one: 50-grind preceding sample gross mass 50g；Amount of substance in m -0.074mm aperture sieve, g.
Further, the explosibility of pulverized coal measurement includes the following steps: to weigh the coal dust sample that granularity is less than 0.071mm
0.9995g~1.0005g, and put it into the long tube of belly pipe front end, after then long tube is closely connect with belly pipe, then
Start blowing device, sprayed into the glass tube equipped with 1050 DEG C of constant temperature fire sources, it is observed by electronic camera and returns to flame
Length, thus judge its explosivity.
Further, the coal dust mobility and floodability measurement use the multi-functional powder physics characteristic test of MT-1000
Instrument.
Further, when measurement, the size distribution control of laboratory sample accounts for 80% in the coal dust content that granularity is 200 mesh.
Further, coal dust coal ash meltbility is measured according to national standard " measuring method of coal ash melting property ", according to state
Family's standard " bituminous coal caking index measuring method " measures its caking property.
Further, when measuring Hardgrove grind ability index using Kazakhstan Dege Luo Fufa coal pulverizer.
It further, is referred to as the electronic balance of 0.0001g using standard when weighing.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
The embodiment of the present invention is described below in detail, it is described to be exemplary, it is intended to be used to explain the present invention, and cannot manage
Solution is limitation of the present invention.
A kind of high calcium bituminous coal based on ash fusion characteristic provided by the invention for blast furnace blowing optimization method be
On the basis of coal dust basic characteristic and blowing process characteristic test, realized by regulating and controlling the ash fusion point of mixed coal.Particular technique
Scheme is as follows:
(1) measuring is carried out to the basic characteristic of high calcium bituminous coal
1) Industrial Analysis
According to the method for national standard GB/T212-91 to the moisture (M) of coal dust, ash content (A), volatile matter (V) and fixed carbon (FC)
It is measured, wherein remaining experiment is completed under dry base in addition to determination of moisture is completed under air-dried basis, utilizes simultaneously
The calorific value of WZR-1A type micro computer auto-calorimeter measurement coal dust sample.
2) elemental analysis
For coal dust elemental analysis, carried out primarily directed to C, H, O, N, S etc. and the closely related element of its industrial application
Measurement, can be used intelligent elemental analyser.
3) coal dust ash constituent analysis
Coal powder fraction is prepared according to the method for national standard GB/T212-91, it is right using Xray fluorescence spectrometer (XRF-1800)
Coal dust ash component carries out analysis measurement.
(2) measuring is carried out to the blowing process characteristic of high calcium bituminous coal
1) Hardgrove grind ability index detects
Test the device of the measurement coal dust grindability used --- breathe out Dege Luo Fufa coal pulverizer.By coal pulverizer before experiment
Grinding groove cleans up, and the steel ball that 8 diameters are 1 cun is placed in grinding trench bottom, then coal dust sample (quality 50g, granularity
It is equably spread out in around steel ball for 0.63~1.25mm).Abrasive disk with square hole is covered on ball, the rotary shaft under ballast
Lower end face abrasive disk square hole, the screw by grinding groove edge fix entire grinding system.Ballast all concentrates at this time
On the steel ball of abrasive disk covering.Counter is transferred to 0, starts coal pulverizer, abrasive disk revolution 20r/min, time 3min, meter 60
Turn.Sample is taken out, is put into the sieve of the aperture 0.074mm, be sieved 10min on vibration screening machine, and weighing calculates, and each sample repeats to examine
It surveys 3 times.Kazakhstan grindability calculation formula are as follows:
K=13+6.93 × (50-m)
In formula:
50 --- sample gross mass 50g before grinding；
M --- amount of substance in 0.074mm aperture sieve, g.
2) explosibility of pulverized coal measures
Explosive measurement experiment is using the improved test device measurement coal dust of University of Science & Technology, Beijing under different oxygen concentrations
Explosive flame returns to length to determine that it has non-explosive and its explosive power.It is referred to as the electronic balance of 0.0001g using standard,
Coal dust sample (1 ± 0.0005) g that granularity is less than 0.071mm is weighed, and is put it into the long tube of belly pipe front end.By long tube
After closely connecting with belly pipe, start blowing device, is sprayed into the glass tube equipped with 1050 DEG C of constant temperature fire sources, pass through electronics phase
Machine observes its length for returning to flame, to judge its explosivity.
3) coal dust mobility and floodability measurement
Carr flow index method is that laboratory determines the preferable method of pulverized coal injection in blast furnace mobility, is more nearly blast furnace spray
The actual conditions blown.Experiment measures the mobility and spray of different coal dusts using the multi-functional powder physics characteristic tester of MT-1000
Fluidity.In experiment, measurement three times, is averaged every time, is the practical coal injection granularity requirements of analog blast furnace, the grain of laboratory sample
Degree distributed controll accounts for 80% in the coal dust content that granularity is -200 mesh.
4) coal dust coal ash meltbility and caking property measurement
Experiment measures the ash of coal dust sample according to national standard " measuring method of coal ash melting property " (GB/T 219-2008)
Melting characteristic, " bituminous coal caking index measuring method " (GB/T 5447-85) surveys coal dust caking property according to national standards
It is fixed.
Feasibility by (1) and (2) to high calcium bituminous coal for blast furnace blowing is determined, and selects high ash melting point after determining
The mixed collocation of blast furnace blowing anthracite, according to the proportion of anthracite and bituminous coal be tetra- kinds of 5:5,6:4,7:3,8:2 ratio
Example is mixed, and is melted characteristic to the ash of mixed coal and is measured, and selection meets property under the conditions of the suitable volatile matter of needs of production
Valence is than high, 1250 DEG C of > of ash content softening temperature (ash fusion point) mixed coal scheme.The present invention is made into one by specific example below
Step statement.
Embodiment 1
A kind of a kind of high calcium bituminous coal A and common blast furnace blowing anthracite B is selected, according to two kinds of coals of preceding method measuring
The basic characteristic and blowing process characteristic, measurement result of powder are as follows:
The full Industrial Analysis of 1 coal dust of table
The elemental analysis of 2 coal dust of table
| Sample ID | C | H | N | S | O |
| A | 74.59 | 3.95 | 0.76 | 0.21 | 12.64 |
| B | 81.20 | 3.11 | 1.24 | 0.67 | 2.09 |
The ash component of 3 coal dust of table is analyzed
| Sample ID | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | TiO2 | SO3 | P2O5 | K2O | Na2O |
| A | 21.17 | 10.64 | 22.92 | 31.70 | 0.89 | 0.39 | 8.72 | 0.04 | 1.07 | 1.35 |
| B | 53.05 | 35.69 | 2.55 | 2.36 | 0.32 | 1.87 | 0.70 | 1.12 | 0.71 | 1.05 |
4 coal dust Hardgrove grind ability index measurement result of table
| Sample ID | Grindability index |
| A | 66.00 |
| B | 58.05 |
5 coal dust of table explodes returned fire length under the conditions of different oxygen, mm
6 coal dust slamp value of table and jet flow sex index
| Sample ID | Slamp value | Jet flow sex index |
| A | 56 | 59 |
| B | 60 | 71 |
7 coal powder fraction characteristic melting temperature of table and index of cementation
ST is softening temperature, i.e. the ash fusion point of coal dust, and blast furnace blowing requires coal dust ash fusion point to be greater than 1250 DEG C
The above experimental data is analyzed, according to national standard " oxygen enriched blast coal injection technical specification " (20152233-T-605),
High calcium bituminous coal A be may determine that other than ash fusion point is unsatisfactory for blast furnace blowing, remaining basic characteristic and blowing process function admirable are complete
Meet blast furnace blowing requirement entirely, therefore utilizes preceding method, by the anthracite B of high ash melting point and high calcium bituminous coal A according to 5:5,6:
4, tetra- kinds of ratios of 7:3,8:2 are mixed, and are measured to the ash fusion point of mixed coal, and experiment mix proportion scheme is shown in Table 8, experimental result
It is shown in Table 9.
8 mixed coal proportion scheme of table and Industrial Analysis (dry base)
The different mixed coal scheme ash fusion characteristic test results of table 9
As can be seen from Table 9, after two kinds of coal dust mix and match, the ash fusion point of mixed coal is under four kinds of conditions of mixture ratios up to 1300
DEG C or more, meet blast furnace blowing requirement, during actual production process, can be selected different according to blast furnace process actual demand
The coal dust of volatile matter content is blown, and blast fumance can be met.
To sum up, the high calcium bituminous coal of the invention based on ash fusion characteristic is used for the optimization method of blast furnace blowing, not only may be used
New thinking is provided with the coal blending optimizing for blast furnace PCI technology, expands the resource of iron and steel enterprise's pulverized coal injection into blast furna, while to low
The high-value-use of rank coal has positive effect, pushes coal enterprise's upgrading synergy, brings two-win for iron and steel enterprise and coal enterprise.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. the optimization method that a kind of high calcium bituminous coal based on ash fusion characteristic is used for blast furnace blowing, which is characterized in that including such as
Lower step:
S101: the basic characteristic of high calcium bituminous coal is measured first；
S102: and then the blowing process characteristic of the measurement high calcium bituminous coal, and feasibility is carried out to the high calcium bituminous coal and is determined；
S103: it is mixed according to the proportion of anthracite and bituminous coal for tetra- kinds of ratios of 5:5,6:4,7:3,8:2, and to the ash of mixed coal
Molten characteristic is measured, and selection meets under the conditions of the suitable volatile matter of needs of production that cost performance is high, ash content softening temperature is big
In 1250 DEG C of mixed coal scheme.
2. the high calcium bituminous coal according to claim 1 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, the step S101 is specifically included:
S1011: being measured the moisture of high calcium bituminous coal, ash content, volatile matter and fixed carbon, wherein in addition to determination of moisture is in air
It is completed under dry base, remaining experiment is completed under dry base, while measuring the calorific value of coal dust sample；
S1012: elemental analysis is carried out for high calcium bituminous coal using intelligent elemental analyser；
S1013: analysis measurement is carried out using coal dust ash component of the Xray fluorescence spectrometer to high calcium bituminous coal.
3. the high calcium bituminous coal according to claim 1 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, the blowing process characteristic of high calcium bituminous coal described in the step S102 specifically includes: Hardgrove grind ability index, coal dust
Explosive, coal dust mobility and floodability, coal dust coal ash meltbility and caking property.
4. the high calcium bituminous coal according to claim 3 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, the Hardgrove grind ability index detection includes the following steps: to clean up the grinding groove of coal pulverizer, straight by 8
Diameter is that 1 cun of steel ball is placed in grinding trench bottom, then coal dust sample is equably spread out in around steel ball, and the abrasive disk with square hole is covered
On Gai Qiu, the rotary shaft lower end face abrasive disk square hole under ballast, the screw by grinding groove edge, which will entirely be ground, is
System is fixed, and ballast is all concentrated on the steel ball of abrasive disk covering, then counter is transferred to 0, starts coal pulverizer, abrasive disk
Revolution 18r/min~22r/min, time 2min~4min count 55 turns~65 turns, then take out sample, be put into the aperture 0.074mm
Be sieved 8min~12min in sieve and on vibration screening machine, is re-weighed calculating, and each sample repeats detection 3 times, wherein pulverized coal sample
The quality of product is 50g, and granularity is 0.63mm~1.25mm, Kazakhstan grindability calculation formula are as follows:
K=13+6.93 × (50-m) formula one；
In formula one: 50-grind preceding sample gross mass 50g；Amount of substance in m -0.074mm aperture sieve, g.
5. the high calcium bituminous coal according to claim 3 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, the explosibility of pulverized coal measurement includes the following steps: to weigh the coal dust sample 0.9995g that granularity is less than 0.071mm
~1.0005g, and put it into the long tube of belly pipe front end, after then closely connecting long tube with belly pipe, restart spray
Equipment is blown, is sprayed into the glass tube equipped with 1050 DEG C of constant temperature fire sources, its length for returning to flame is observed by electronic camera,
To judge its explosivity.
6. the high calcium bituminous coal according to claim 3 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, the coal dust mobility and floodability measurement use the multi-functional powder physics characteristic tester of MT-1000.
7. the high calcium bituminous coal according to claim 6 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, when measurement, the size distribution control of laboratory sample accounts for 80% in the coal dust content that granularity is 200 mesh.
8. the high calcium bituminous coal according to claim 3 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, coal dust coal ash meltbility is measured according to national standard " measuring method of coal ash melting property ", according to national standard " cigarette
Coal caking index measuring method " measure its caking property.
9. the high calcium bituminous coal according to claim 3 or 4 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, when measuring Hardgrove grind ability index using Kazakhstan Dege Luo Fufa coal pulverizer.
10. the high calcium bituminous coal according to claim 5 based on ash fusion characteristic is used for the optimization method of blast furnace blowing,
It is characterized in that, is referred to as the electronic balance of 0.0001g using standard when weighing.
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