CN104411838B - Pulverized coal injection into blast furna and its manufacture method - Google Patents
Pulverized coal injection into blast furna and its manufacture method Download PDFInfo
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- CN104411838B CN104411838B CN201380035147.8A CN201380035147A CN104411838B CN 104411838 B CN104411838 B CN 104411838B CN 201380035147 A CN201380035147 A CN 201380035147A CN 104411838 B CN104411838 B CN 104411838B
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- coal
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- pulverized coal
- oxygen
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/007—Conditions of the cokes or characterised by the cokes used
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/14—Features of low-temperature carbonising processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- 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
Abstract
The present invention provides the pulverized coal injection into blast furna of the inside injection of the blast-furnace body from air port to blast-furnace equipment, wherein, oxygen atom content ratio (drying schedule) is 10～20 weight %, and average fine pore is 10～50nm.
Description
Technical field
The present invention relates to pulverized coal injection into blast furna and its manufacture method.
Background technology
In blast-furnace equipment, the raw materials such as iron ore, limestone, coking coal are loaded by the inside from top to blast-furnace body,
And the tuyere injection hot blast on the lower by sidepiece and the dust coal (PCI coals) as auxiliary fuel, thus, it is possible to by iron mine
It is made of stones to make the pig iron.
As such pulverized coal injection into blast furna, it is proposed that for example by KMnO4、H2O2、KClO3、K2Cr2O4Add Deng oxidant in advance
Be added in dust coal, thus improve efficiency of combustion and can suppress the generation of unburned carbon (coal) pulverized coal injection into blast furna (for example, referring to
Following patent documentations are 1).
In addition, it is proposed that oxygen coalescence is for example made in hot blast and is blown from air port to the inside of blast-furnace body, thus carried
The flammability (for example, referring to following patent documentations 2) of high pulverized coal injection into blast furna.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 6-220510 publication
Patent documentation 2：Japanese Unexamined Patent Publication 2003-286511 publications
The content of the invention
Invent problem to be solved
But, for the pulverized coal injection into blast furna described in above-mentioned patent documentation 1, specially oxidant as described above is added
It is added in dust coal, therefore causes the increase of operating cost.
In addition, in the flammability raising method described in above-mentioned patent documentation 2, needing side to be continuously added in hot blast greatly
The oxygen side of amount makes blast furnace operate, therefore still results in the increase of operating cost.
Thus, it is an object of the present invention to provide unburned carbon (coal) can be suppressed so that low cost improves efficiency of combustion
The pulverized coal injection into blast furna and its manufacture method of generation.
Means for solving the problems
It is the blast-furnace body from air port to blast-furnace equipment for solving above-mentioned problem, the first invention pulverized coal injection into blast furna
Inside injection pulverized coal injection into blast furna, it is characterised in that oxygen atom content ratio (drying schedule) is 10～20 weight %, averagely
Fine pore is 10～50nm.
The pulverized coal injection into blast furna of the second invention is characterised by, in the first invention, pore volume is 0.05～0.5cm3/g。
The pulverized coal injection into blast furna of the 3rd invention is characterised by, in the first or second invention, specific surface area is 1～100m2/
g。
In addition, be characterised by for solving above-mentioned problem, the 4th invention pulverized coal injection into blast furna manufacture method, its
It is the manufacture method of any one pulverized coal injection into blast furna in the first to the 3rd invention, wherein carrying out：Heat ub-bituminous coal or brown coal and remove
Remove the drying process of moisture；With the dry distilling work that the coal being dried in the drying process is carried out at 460～590 DEG C dry distilling
Sequence.
The manufacture method of the pulverized coal injection into blast furna of the 5th invention is characterised by, in the 4th invention, enters and is about to the dry distilling
In operation, the coal of dry distilling is cooled to 50～150 DEG C of refrigerating work procedure；With by described in cooling down in the refrigerating work procedure
Coal is exposed in 50～150 DEG C of oxygen-containing atmosphere, and the partial oxidation operation of its partial oxidation is made so as to chemically adsorbing oxygen.
Invention effect
Pulverized coal injection into blast furna of the invention, average fine pore are 10～50nm, i.e. oxygen-containing functional group (carboxyl, aldehyde radical, ester
Base, hydroxyl etc.) etc. tar generate base and depart from and be greatly decreased, and oxygen atom content ratio (drying schedule) is 10～20 weights
The decomposition (reduction) of amount %, i.e. main framing (combusting component centered on C, H, O) is significantly suppressed, therefore, if same with hot blast
When be blown from air port to the inside of blast-furnace body, then contain a large amount of oxygen atoms in main framing, and due to the big pore of diameter,
The oxygen of hot blast easily diffuses to inside, and moreover, tar ingredients become to be very difficult to produce, it is thus possible to do not produce substantially not
Burn completely to combustion carbon (coal), suppress the generation of unburned carbon (coal) therefore, it is possible to efficiency of combustion be improved with low cost.
In addition, the manufacture method of pulverized coal injection into blast furna of the invention, can be with the above-mentioned blast furnace blowing of low cost manufacture
Coal.
Description of the drawings
Fig. 1 is the flow chart of the first embodiment step of the manufacture method of the pulverized coal injection into blast furna for representing the present invention.
Fig. 2 is the flow chart of the second embodiment step of the manufacture method of the pulverized coal injection into blast furna for representing the present invention.
Fig. 3 is when representing to measure infrared absorption spectroscopy when ub-bituminous coal intensification is made under nitrogen atmosphere, temperature and oxygen-containing official
The chart of the relation of the content ratio that can be rolled into a ball.
Fig. 4 be represent make coal of the present invention and moisture-free coal and existing coal combustion after after the ratio of unburned carbon that reclaims and burning
Burning waste gas in remaining oxygen concentration (superfluous oxygen concentration) relation chart.
Fig. 5 is the figure for representing excess oxygen rate when making coal of the present invention and existing coal burn completely and the relation of ignition temperature
Table.
Specific embodiment
The embodiment of the pulverized coal injection into blast furna and its manufacture method of the present invention is illustrated based on accompanying drawing, but the present invention is simultaneously
It is not limited only to based on the following embodiment illustrated by accompanying drawing.
＜ first embodiments ＞
The first embodiment of the pulverized coal injection into blast furna and its manufacture method of the present invention is illustrated based on Fig. 1.
The oxygen atom content ratio (drying schedule) of the pulverized coal injection into blast furna of present embodiment is 10～18 weight %, average thin
Aperture is 10～50nm (nanometer) (preferably 20～50nm (nanometer)).
The pulverized coal injection into blast furna of such present embodiment is as shown in figure 1, can be easily manufactured by following operation：Will be secondary
The low grade coals such as bituminous coal, brown coal (oxygen atom content ratio (drying schedule)：More than 18 weight %, average fine pore：3～4nm)
11 in hypoxic atmosphere (oxygen concentration：Below 5 volumes %) heated (110～200 DEG C × 0.5～1 hour) and be dried (dry
Operation S11), so as to remove after moisture, (the oxygen concentration in hypoxic atmosphere：Below 2 volumes %) heated (460～590 DEG C
(preferably 500～550 DEG C) × 0.5～1 hour) and dry distilling (dry distilling operation S12), so as to will generate water, carbon dioxide, tar into
Grade after removing as carbonizing gas, empyreumatic oil, (the oxygen concentration in hypoxic atmosphere：Below 2 volumes %) cooled down (50 DEG C with
Under) (refrigerating work procedure S13), Crushing of Ultrafine (particle diameter：Less than 77 μm (80% passes through)) (Crushing of Ultrafine operation S14).
By such present embodiment manufacture method manufacture pulverized coal injection into blast furna 12 in, average fine pore be 10～
The tar such as 50nm, i.e. oxygen-containing functional group (carboxyl, aldehyde radical, ester group, hydroxyl etc.) generate base and depart from and be greatly decreased, and oxygen atom contains
The decomposition (reduction) of proportional (drying schedule) for 10～18 weight %, i.e. main framing (combusting component centered on C, H, O)
Significantly suppressed, therefore, if be blown from air port to the inside of blast-furnace body with hot blast simultaneously, contain a large amount of oxygen in main framing
Atom, and due to the big pore of diameter, the oxygen of hot blast easily diffuses to inside, and moreover, tar ingredients become very difficult
To produce, it is thus possible to burn completely with not producing substantially unburned carbon (coal).
Therefore, in the pulverized coal injection into blast furna 12 of present embodiment, even if neither making which contain KMnO4、H2O2、KClO3、
K2Cr2O4Deng oxidant, also oxygen coalescence is not made in hot blast, also can improve efficiency of combustion and suppress the generation of unburned carbon (coal).
Therefore, according to present embodiment, efficiency of combustion can be improved with low cost and suppresses the generation of unburned carbon (coal).
It should be noted that in the pulverized coal injection into blast furna 12 of present embodiment, it is (excellent that average fine pore is necessary for 10～50nm
Select 20～50nm).This is because, if average fine pore is less than 10nm, the easy degree drop that the oxygen in hot blast internally spreads
It is low, cause combustible reduction, on the other hand, if average fine pore is more than 50nm, easily because the generation such as thermal shock is broken
Become fine, when being blown to the inside of blast-furnace body, if occurring broken and becoming fine, pass through in the state of with air-flow
The inside of blast-furnace body and unburned ground is discharged.
In addition, oxygen atom content ratio (drying schedule) is also necessary for more than 10 weight %.If this is because, oxygen atom contains
It is proportional to be less than 10 weight %, then in the case where not containing oxidant, not making the oxygen coalescence of hot blast, it is difficult to which is fired completely
Burn.
Additionally, it is preferred that pore volume is 0.05～0.5cm3/ g, particularly very preferably 0.1～0.2cm3/g.This be by
In if pore volume is less than 0.05cm3/ g, then with hot blast in oxygen contact area (response area) it is little, burning may be caused
The reduction of property；On the other hand, if pore volume is more than 0.5cm3/ g, then fire as the volatilization of a large amount of compositions causes excessive porous
Burning till point becomes very few.
Additionally, it is preferred that specific surface area is 1～100m2/ g, particularly very preferably 5～20m2/g.If this is because, ratio
Surface area is less than 1m2/ g, then with hot blast in oxygen contact area (response area) it is little, it is possible to cause combustible reduction；
On the other hand, if specific surface area is more than 100m2/ g, then as the volatilization of a large amount of compositions causes excessive porous, combusting component becomes
It is very few.
On the other hand, in the manufacture method of the pulverized coal injection into blast furna of present embodiment, the dry distilling temperature of dry distilling operation S12
Degree is necessary for 460～590 DEG C (preferably 500～550 DEG C).If this is because, pyrolysis temperature is less than 460 DEG C, can not make oxygen-containing
The tar such as functional group generate base and are sufficiently disengaged from from above-mentioned low grade coal 11, and make average fine pore become non-for 10～50nm
It is often difficult；On the other hand, if pyrolysis temperature is more than 590 DEG C, the main framing of above-mentioned low grade coal 11 is (centered on C, H, O
Combusting component) decomposition start to become notable, as the volatilization of a large amount of compositions causes combusting component excessively to reduce.
＜ second embodiments ＞
The second embodiment of the pulverized coal injection into blast furna and its manufacture method of the present invention is illustrated based on Fig. 2.It should be noted that
Same part in the case of with above-mentioned embodiment, by using with the symbol used in the explanation of above-mentioned embodiment
Number identical symbol, omits the repeat specification with the explanation in above-mentioned embodiment.
The oxygen atom content ratio (drying schedule) of the pulverized coal injection into blast furna of present embodiment is 12～20 weight %, average thin
Aperture is 10～50nm (preferably 20～50nm).
The pulverized coal injection into blast furna of such present embodiment is as shown in Fig. 2 can be easily manufactured by following operation：Will be upper
State low grade coal (oxygen atom content ratio (drying schedule)：More than 18 weight %) 11 carry out in the same manner as above-mentioned embodiment
Be dried (drying process S11), dry distilling (dry distilling operation S12) is carried out in the same manner as above-mentioned embodiment, (the oxygen in hypoxic atmosphere
Concentration：Below 2 volumes %) (50～150 DEG C) (refrigerating work procedure S23) afterwards is cooled down, expose that (50～150 DEG C × 0.5～10 is little to the open air
When) (the oxygen concentration in oxygen-containing atmosphere：5～21 volumes %), (partial oxidation work after its partial oxidation is made so as to chemically adsorbing oxygen
Sequence S25), Crushing of Ultrafine (Crushing of Ultrafine operation S14) is carried out in the same manner as above-mentioned embodiment.
I.e., in the present embodiment, the coal of dry distilling in above-mentioned dry distilling operation S12 is cooled to after 50～150 DEG C,
Oxygen is adsorbed to the coal chemistry in partial oxidation operation S25 and the coal partial oxidation is made, so as to obtain oxygen atom content ratio
(drying schedule) is the pulverized coal injection into blast furna 22 of 12～20 weight %.
In the pulverized coal injection into blast furna 22 of the manufacture method manufacture using such present embodiment, with above-mentioned embodiment
Situation similarly, average fine pore is the life of the tar such as 10～50nm, i.e. oxygen-containing functional group (carboxyl, aldehyde radical, ester group, hydroxyl etc.)
Depart from into base and be greatly decreased, and oxygen atom content ratio (drying schedule) is 12～20 weight %, i.e. main framing (with C, H, O
Centered on combusting component) decomposition (reduction) significantly suppressed, and further chemisorbed has oxygen atom, therefore, if with
Hot blast is blown from air port to the inside of blast-furnace body simultaneously, then compared with the situation of above-mentioned embodiment, main framing more contains
There is oxygen atom, and in the same manner as the situation of above-mentioned embodiment, the oxygen of hot blast easily spreads due to diameter big pore
To inside, moreover, tar ingredients become to be very difficult to produce, therefore, compared with the situation of above-mentioned embodiment, Neng Goujin
One step is burnt with not producing unburned carbon (coal) completely.
Therefore, in the pulverized coal injection into blast furna 22 of present embodiment, even if neither making which contain KMnO4、H2O2、KClO3、
K2Cr2O4Deng oxidant, also oxygen coalescence is not made in hot blast, compared with the situation of above-mentioned embodiment, it is also possible to further carry
High burning efficiency the more effectively generation of suppression unburned carbon (coal).
Therefore, according to present embodiment, compared with the situation of above-mentioned embodiment, can more effectively with low cost raising
Efficiency of combustion simultaneously suppresses the generation of unburned carbon (coal).
It should be noted that in the pulverized coal injection into blast furna 22 of present embodiment, oxygen atom content ratio (drying schedule) must
Must be for below 20 weight %.This is because, if oxygen atom content ratio is more than 20 weight %, the content of oxygen is excessive, and generates heat
Amount becomes too low.
On the other hand, in the manufacture method of the pulverized coal injection into blast furna of present embodiment, preferred above-mentioned partial oxidation operation S25
Treatment temperature be 50～150 DEG C.If this is because, treatment temperature be less than 50 DEG C, even air (oxygen concentration：21 bodies
Product %) atmosphere, also become to be difficult to partial oxidation process, if treatment temperature is more than 150 DEG C, even oxygen concentration is 5 bodies
The atmosphere of product % or so, it is also possible to produce carbon monoxide, carbon dioxide due to combustion reaction in a large number.
Embodiment
The enforcement implemented to confirm the action effect of pulverized coal injection into blast furna of the invention and its manufacture method is illustrated below
Example, but the present invention is not limited in the following examples that illustrate based on various data.
〈No.1：Composition analysis ＞
Carry out the group of pulverized coal injection into blast furna 12 (coal of the present invention) obtained according to the manufacture method of above-mentioned first embodiment
Into analysis (elementary analysiss).In addition, in order to be compared, also carried out existing pulverized coal injection into blast furna (PCI coals simultaneously：It is existing
Coal), and first embodiment in omit the composition analysis of coal (moisture-free coal) obtained from above-mentioned dry distilling operation S12.Its result is shown
In following tables 1.It should be noted that numerical value is drying schedule meter.
【Table 1】
| Coal of the present invention | Existing coal | Moisture-free coal | |
| C (wt.%) | 73.8 | 84.5 | 71.0 |
| H (wt.%) | 3.2 | 3.8 | 3.6 |
| O (wt.%) | 14.4 | 2.9 | 18.5 |
| N (wt.%) | 1.1 | 1.7 | 1.0 |
| S (wt.%) | 0.3 | 0.5 | 0.5 |
| Caloric value (kcal/kg) | 6700 | 8020 | 6300 |
From above-mentioned table 1, in coal of the present invention, the ratio of oxygen (O) compares very big less than moisture-free coal, with existing coal facies, separately
On the one hand, the ratio of carbon (C) is more than moisture-free coal, less than existing coal.Therefore, the caloric value of coal of the present invention is more than moisture-free coal, is less than
Existing coal.
〈No.2：Apparent condition ＞
Determine the apparent condition (average fine pore, pore volume, specific surface area) of above-mentioned coal of the present invention.In addition, being
It is compared, also determines the apparent condition of above-mentioned existing coal and moisture-free coal simultaneously.The results are shown in following tables 2.
【Table 2】
| Coal of the present invention | Existing coal | Moisture-free coal | |
| Average fine pore (nm) | 20 | 1.5 | 3.5 |
| Pore volume (cm3/g) | 0.13 | 0.08 | 0.14 |
| Specific surface area (m2/g) | 10.4 | 0.23 | 15 |
From above-mentioned table 2, the average fine pore of coal of the present invention is very big compared with existing coal and moisture-free coal.
〈No.3：Oxygen-containing functional group amount ＞
Infrared absorption spectroscopy is measured when making ub-bituminous coal (U.S.'s PRB coals) heat up (10 DEG C/min) under nitrogen atmosphere, thus
Try to achieve the content ratio of each temperature of oxygen-containing functional group (hydroxyl (OH), carboxyl (COOH), aldehyde radical (COH), ester group (COO))
Amount.The results are shown in Fig. 3.It should be noted that transverse axis represents temperature, the longitudinal axis represents that the peak area of each oxygen-containing functional group is relative
The ratio of the whole peak area of oxygen-containing functional group when 110 DEG C.
Substantially disappear from the figure 3, it may be seen that confirming above-mentioned oxygen-containing functional group, i.e. tar and generating base at 460 DEG C, at 500 DEG C
When all disappear.
〈No.4：Flammability ＞
Trying to achieve makes above-mentioned the coal of the present invention ratio of the unburned carbon of remaining and air in 1500 DEG C of combustion synthesis in air
The relation of supply flow rate.In addition, in order to be compared, also try to achieve the situation of above-mentioned existing coal and moisture-free coal simultaneously.Its result
It is shown in Figure 4.It should be noted that in the diagram, transverse axis represents that the remaining oxygen in the burning waste gas after making the coal combustion is dense
Degree, in other words, represents superfluous oxygen concentration, and the longitudinal axis represents the ratio of the unburned carbon reclaimed after making the coal combustion.
As shown in Figure 4, for existing coal and moisture-free coal, as superfluous oxygen concentration is reduced, unburned carbon amounts gradually increases.
On the other hand, reduce even if confirming coal surplus oxygen concentration of the present invention, unburned carbon amounts does not also increase, substantially can burn completely.
〈No.5：Ignition temperature ＞
Try to achieve the excess oxygen rate and ignition temperature when under conditions of following, making above-mentioned coal of the present invention 100% burn completely
Relation.In addition, in order to be compared, also try to achieve the situation of above-mentioned existing coal simultaneously.The results are shown in Fig. 5.Need
Bright, excess oxygen rate Os is the value defined by following formulas (1).
* combustion-type
C+O2→CO2
H2+1/2O2→H2O
* burning condition
Supply air themperature：1200℃
Air oxygen concentration：21vol.%
Coal supplying temperature：25℃
Attached water：2%
Excess oxygen rate Os=(Oa+Oc/2)/(Cc+Hc/4) (1)
Wherein, Oa is the molar flow for supplying the oxygen (molecule) in air, and Oc is to supply the oxygen atom molar flow in coal
Amount, Cc are to supply the carbon atom molar flow in coal, and Hc is to supply the hydrogen atom molar flow in coal.
As shown in Figure 5, the caloric value of coal of the present invention is confirmed less than existing coal, but in the excess oxygen rate same with existing coal
In the case of, ignition temperature is higher than existing coal on the contrary.This is because, the ratio containing aerobic of coal of the present invention is higher than existing coal, therefore
If being set to the excess oxygen rate same with existing coal, can be completed with the supply air capacity less than existing coal.
Industrial applicability
The present invention pulverized coal injection into blast furna and its manufacture method can in coal industry, ferrum industry processed etc. extremely beneficial land productivity
With.
Symbol description
11 low grade coals (ub-bituminous coal or brown coal)
12nd, 22 pulverized coal injection into blast furna
S11 drying processes
S12 dry distilling operations
S13, S23 refrigerating work procedure
S14 Crushing of Ultrafine operations
S25 partial oxidation operations
Claims (4)
1. a kind of pulverized coal injection into blast furna, it is characterised in that the pulverized coal injection into blast furna is the blast-furnace body from air port to blast-furnace equipment
The pulverized coal injection into blast furna of internal injection, wherein,
Oxygen atom content ratio is calculated as 12～20 weight % with drying schedule,
Average fine pore is 10～50nm.
2. pulverized coal injection into blast furna as claimed in claim 1, it is characterised in that
Pore volume is 0.05～0.5cm3/g。
3. pulverized coal injection into blast furna as claimed in claim 1, it is characterised in that
Specific surface area is 1～100m2/g。
4. a kind of manufacture method of pulverized coal injection into blast furna, it is characterised in that the manufacture method is claim 1 to claim 3
Any one of pulverized coal injection into blast furna manufacture method, wherein carrying out following operation：
Drying process, heats ub-bituminous coal or brown coal and removes moisture；
The coal being dried in the drying process is carried out dry distilling at 460～590 DEG C by dry distilling operation；
The coal of dry distilling in the dry distilling operation is cooled to 50～150 DEG C by refrigerating work procedure；
Partial oxidation operation, by the coal cooled down in the refrigerating work procedure is exposed in 50～150 DEG C of oxygen-containing atmosphere,
Its partial oxidation is made so as to chemically adsorbing oxygen.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-172756 | 2012-08-03 | ||
| JP2012172756 | 2012-08-03 | ||
| PCT/JP2013/063506 WO2014020965A1 (en) | 2012-08-03 | 2013-05-15 | Blast-furnace-blow-in charcoal and method for producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104411838A CN104411838A (en) | 2015-03-11 |
| CN104411838B true CN104411838B (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380035147.8A Expired - Fee Related CN104411838B (en) | 2012-08-03 | 2013-05-15 | Pulverized coal injection into blast furna and its manufacture method |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20150191803A1 (en) |
| JP (1) | JP5843968B2 (en) |
| KR (1) | KR101657427B1 (en) |
| CN (1) | CN104411838B (en) |
| AU (1) | AU2013297837B2 (en) |
| DE (1) | DE112013003846T5 (en) |
| IN (1) | IN2015DN00192A (en) |
| WO (1) | WO2014020965A1 (en) |
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| JP6551470B2 (en) * | 2016-07-29 | 2019-07-31 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP6551471B2 (en) * | 2016-07-29 | 2019-07-31 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| CN115353914A (en) * | 2022-09-13 | 2022-11-18 | 中国科学院广州能源研究所 | Tar purification treatment method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06220510A (en) | 1993-01-28 | 1994-08-09 | Sumitomo Metal Ind Ltd | Operation of blast furnace |
| JPH09263807A (en) * | 1996-03-27 | 1997-10-07 | Nisshin Steel Co Ltd | Method for injecting pulverized coal into blast furnace |
| JP2000237528A (en) * | 1999-02-22 | 2000-09-05 | Nkk Corp | Method for using coal, coal dry distillation product and its production |
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2013
- 2013-05-15 JP JP2014528025A patent/JP5843968B2/en not_active Expired - Fee Related
- 2013-05-15 KR KR1020157001877A patent/KR101657427B1/en active IP Right Grant
- 2013-05-15 US US14/412,921 patent/US20150191803A1/en not_active Abandoned
- 2013-05-15 IN IN192DEN2015 patent/IN2015DN00192A/en unknown
- 2013-05-15 AU AU2013297837A patent/AU2013297837B2/en not_active Ceased
- 2013-05-15 DE DE112013003846.3T patent/DE112013003846T5/en not_active Ceased
- 2013-05-15 WO PCT/JP2013/063506 patent/WO2014020965A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2014020965A1 (en) | 2016-07-21 |
| KR101657427B1 (en) | 2016-09-13 |
| KR20150024913A (en) | 2015-03-09 |
| US20150191803A1 (en) | 2015-07-09 |
| AU2013297837B2 (en) | 2016-03-10 |
| DE112013003846T5 (en) | 2015-04-23 |
| AU2013297837A1 (en) | 2015-01-29 |
| CN104411838A (en) | 2015-03-11 |
| JP5843968B2 (en) | 2016-01-13 |
| IN2015DN00192A (en) | 2015-06-12 |
| WO2014020965A1 (en) | 2014-02-06 |
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