CN1133889A - Method of blowing charcaol powder into blast furnace - Google Patents
Method of blowing charcaol powder into blast furnace Download PDFInfo
- Publication number
- CN1133889A CN1133889A CN 95121880 CN95121880A CN1133889A CN 1133889 A CN1133889 A CN 1133889A CN 95121880 CN95121880 CN 95121880 CN 95121880 A CN95121880 A CN 95121880A CN 1133889 A CN1133889 A CN 1133889A
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- China
- Prior art keywords
- charcoal powder
- blast furnace
- wood charcoal
- charcoal
- powder
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- Manufacture Of Iron (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention aims at providing a safe and efficient method for blowing charcoal powder to a blast furnace and preventing charcoal powder from adhering and burning in every device. The method of blowing charcoal powder to the blast furnace of the invention is characterized in that the largest grain size of charcoal is 1/3 of the internal diameter of conveying pipes; average grain size of the charcoal is more than 50 Mum, and the water content of the charcoal is below 10 percent (weight).
Description
The invention relates to method, especially jet well than the method for the wood charcoal powder of normally used fine coal light specific gravity about efficient to the blast furnace blowing raw material of wood-charcoal.
In general, as the technology of the solid fuel of pulverizing to blast furnace blowing (for example coal dust), the known blowing method that has as shown in Figure 1.This method, the thicker coal 12 usefulness dumpers 2 of particle diameter that at first will be stored in the charcoal jar 1 draw off, and deliver to drying.In the crusher 3.Then, this coal is dry and be ground into the fine coal with regulation moisture value and granularity under non-oxidizing gas atmosphere in this drier crusher 3, utilizes swirler 4 and bag filter 5 to capture recovery.After this, with rotary conveyor 6 this fine coal is delivered to and to be provided near being subjected in the batch can 7 blast furnace, continue to be sent in the spray tank 9 through intermediate bunker 8, by gas delivery from this spray tank 9 through conveying pipe arrangement 10 by tuyere injection in blast furnace.
Such blowing method since impacted by oil, has been used as the mainstream technology to pulverized coal injection in blast furnace, goes far towards the stable operation of blast furnace.
But, when blast furnace blowing is a kind of wood charcoal powder of solid raw material of wood-charcoal equally, just produce the problem as following with as described above blowing method.That is, because the comminuted height (well) of charcoal, so the micro mist ratio coal after the drying and crushing is many, once mobile deterioration of formation micro mist state, generation is adhered to and is stopped up in each device shown in Figure 1, and obstacle takes place in winding-up.In addition, the wood charcoal powder that comes out from drying and crushing machine 3 is heated to about 100-120 ℃, because moisture value is almost near 0%, so in process thereafter attached to the device that is disposed in, the danger that ingress of air is arranged and catch fire makes above-mentioned blowing method be in the situation that can not intactly be applicable to wood charcoal powder.Moreover, to pulverize under the situation of charcoal with drier crusher equally, the following ratio of its 50 μ m roughly forms 2 times of coal.
Therefore, in light of this situation, the object of the present invention is to provide prevent wood charcoal powder in each device, adhere to and catch fire, safety and efficient is well to the method for blast furnace blowing wood charcoal powder.
In order to achieve the above object, the inventor furthers investigate the conveying characteristic of wood charcoal powder, finds that the conveying characteristic of wood charcoal powder changes with its granularity and moisture value, about granularity, from the relation of carrying the pipe arrangement internal diameter, limit the upper limit, but from the flowability of powder, limit lower limit again; About moisture value, consider from the flowability of powder, limit the upper limit.The present invention is based on these understanding, feature to the method for blast furnace blowing wood charcoal powder is, charcoal is pulverized, drying, carry when the blast furnace blowing with gas, with the maximum particle size of the wood charcoal powder of above-mentioned drying and crushing be carry the pipe arrangement internal diameter 1/3, mean particle size forms more than the 50 μ m and the moisture value of charcoal is to spray below 10% (weight) time.
The present invention, when carrying to blast furnace blowing with gas charcoal pulverizing drying, with the maximum particle size of the wood charcoal powder of above-mentioned drying and crushing be carry the pipe arrangement internal diameter 1/3, mean particle size forms more than the 50 μ m and the moisture value of charcoal is to jet below 10% (weight), so can end everywhere adhering to and stopping up of charcoal in blowing device, its result can prevent that the wood charcoal powder in the blowing device from catching fire.Below, according to Fig. 2, illustrate that the present invention limits the reason of charcoal granularity and moisture.
Fig. 2 is moisture and the mean particle size that contriver's many variations charcoal divides, and wood charcoal powder is carried in the transfer lime with gas, and the wood charcoal powder in the investigation transfer lime adheres to the result of situation.The testing apparatus that in this investigation, uses, the scope that the internal diameter of transfer lime can be adopted in actual job is promptly made 15-50mm, and the also existing most blowing devices of its length and number of bends are as typical value, selection 100m and 30, and the typical pipe arrangement of manufacturing.In addition, pneumatic transmission gas is nitrogen, and its flow is also estimated practical situation, with 3Nm
3/ min tests.
As shown in Figure 2, for the staypak powdered carbon carries out pneumatic transmission, it is necessary making mean particle size form more than the 50 μ m.In addition, about the upper limit size of charcoal, carry the occasion of solids usually at gas, known, this value is adopted if not below 1/3 of conveying pipe arrangement internal diameter just can not be carried in its particle footpath therefore.Having, about the moisture value of charcoal, as can be seen from Figure 2, is good below 10% (weight) again.
Embodiment
According to above-mentioned test-results, in fact use device shown in Figure 1, carry out to the blast furnace blowing wood charcoal powder.The key operation condition of this moment, air output is 14000m
3/ h, hot blast temperature are 800 ℃, and fuel ratio is the 760kg/ ton pig iron.
In addition, the proterties of employed raw material charcoal is shown in the table 1, and the spray of its pulverizing being carried out embodiment and comparative example is inferior.
Table 1
| Project | Numerical value, weight % |
| Size-grade distribution 〉=100 (mm) 100～50 50～25≤25 | ????20 ????40 ????30 ????10 |
| The moisture average range | ????9 ????5～15 |
Winding-up is the result be summarised in the table 2, and according to the present invention, the obstruction that breeze blowing in the past all of no use produces in device can also prevent the danger that wood charcoal powder catches fire.In addition, the winding-up charcoal amount in the present embodiment is about 120kg/ ton pig iron, roughly is comparable to the amount of being blown into of the average blast furnace of existing fine coal, and the possibility of further increase is arranged fully.And, relevant method to the blast furnace blowing charcoal of the present invention, because the granularity constituent ratio fine coal of wood charcoal powder is thick, so size reduction energy can be than lack in the past, moisture also can be high, therefore can reduce dry with energy (being produced by the burning coke-oven gas) significantly.
In addition, pneumatic transmission is with rare gas elementes such as not only above-mentioned nitrogen of gas but also argon gas, even air also obtains same effect.
Table 2
| Project | The present invention | Comparative example | |||||
| ????1 | ????2 | ????3 | ????4 | ????1 | ????2 | ????3 | |
| The charcoal amount of being blown into (t/h) | ????7 | ????7 | ????7 | ????7 | ????7 | ????7 | ????7 |
| The moisture of wood charcoal powder (%) | ???5.0 | ???9.8 | ???9.8 | ????5.0 | ???10.5 | ???1.9 | ???3.7 |
| The mean particle size of wood charcoal powder (mm or μ m) | ??4.9mm | ???2.1mm | ??70μm | ??70μm | ??40μm | ?40μm | ???45μm |
| Stop up frequency (inferior/moon) | ????0 | ????0 | ????0 | ????0 | ????2 | ????8 | ????7 |
| Dry with energy consumption (kcal/kg) | ????0 | ????0 | ????0 | ????0 | ????10 | ???170 | ???120 |
As mentioned above, according to the present invention, can prevent that charcoal in the blowing device from adhering to and stops up the danger that the interior wood charcoal powder of cancellation element catches fire.As its result, can guarantee the smooth running of blowing device, and then the blast furnace of the raw material of wood-charcoal of guaranteeing to jet is stablized operation.And can expect the drying energy and the power consumption of the drying and crushing machine of reduction and fine coal mixed injection, use charcoal.
The simple declaration of accompanying drawing
Fig. 1 is the full figure of expression to blast furnace blowing solid raw material of wood-charcoal method.
Fig. 2 is the test-results figure of the conveying of expression investigation wood charcoal powder.
The explanation of symbol
1 storage charcoal jar
2 draw off device
3 drier crusher
4 swirlers
5 bag filters
6 rotary conveyors
7 are subjected to batch can
8 intermediate bunkers
9 spray tanks
10 carry pipe arrangement
11 blast furnaces
12 solid fuels (coal or charcoal)
13 air ports
Claims (6)
1. to the method for blast furnace blowing wood charcoal powder, it is characterized in that in the method for blast furnace blowing wood charcoal powder, the maximum particle size that makes charcoal is to carry below 1/3 of pipe arrangement internal diameter, mean particle size forms more than the 50 μ m, and the moisture value of charcoal is below 10% (weight).
2. the method to the blast furnace blowing wood charcoal powder of claim 1 record, wherein, using gas in the conveying of wood charcoal powder.
3. the method to the blast furnace blowing wood charcoal powder of claim 2 record wherein, as the pneumatic transmission gas of wood charcoal powder, is used rare gas element or air.
4. the method to the blast furnace blowing wood charcoal powder of claim 2 record wherein, as the pneumatic transmission gas of wood charcoal powder, is used rare gas element and air mixed.
5. require the method to the blast furnace blowing wood charcoal powder of 3,4 records on the power, wherein,, use nitrogen as the pneumatic transmission rare gas element of wood charcoal powder.
6. the method to the blast furnace blowing wood charcoal powder of claim 3,4 records wherein, as the pneumatic transmission rare gas element of wood charcoal powder, is used argon gas.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6302098A JPH08157914A (en) | 1994-12-06 | 1994-12-06 | Blowing of charcoal powder into blast furnace |
| JP302098/1994 | 1994-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133889A true CN1133889A (en) | 1996-10-23 |
| CN1059467C CN1059467C (en) | 2000-12-13 |
Family
ID=17904911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95121880A Expired - Lifetime CN1059467C (en) | 1994-12-06 | 1995-12-05 | Method of blowing charcaol powder into blast furnace |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH08157914A (en) |
| CN (1) | CN1059467C (en) |
| BR (1) | BR9505670A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102482723A (en) * | 2009-09-02 | 2012-05-30 | 安赛乐米塔尔研究与发展有限责任公司 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
| CN104862435A (en) * | 2009-10-29 | 2015-08-26 | 杰富意钢铁株式会社 | Method For Operating Blast Furnace |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100860618B1 (en) * | 2007-09-11 | 2008-09-29 | 케이이테크놀리지 (주) | Urethane collecting facilities |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR7702802A (en) * | 1977-05-02 | 1978-11-21 | Inst Tecn Governador Valadares | PROCESS OF INJECTION OF CHARCOAL FINES IN HIGH OVENS |
| BR7902925A (en) * | 1979-05-01 | 1980-11-11 | Int De Engenharia S A | INJECTION OF CHARCOAL FINES BY THE VENTANEIRAS DO ALTO OVNO |
| BR7903707A (en) * | 1979-06-05 | 1980-12-09 | Acos Especiais Itabira Acesita | PROCESS FOR INJECTING SPRAYED CHARCOAL VEGETABLES THROUGH HIGH-OVEN WASTE |
| BR7903708A (en) * | 1979-06-05 | 1980-12-09 | Acos Especiais Itabira Acesita | PROCESS FOR INJECTING SPRAYED CHARCOAL VEGETABLES THROUGH BLAST-OVENS |
| JPH06172827A (en) * | 1992-12-09 | 1994-06-21 | Sumitomo Metal Ind Ltd | Method for blowing pulverized coal into blast furnace |
-
1994
- 1994-12-06 JP JP6302098A patent/JPH08157914A/en not_active Withdrawn
-
1995
- 1995-12-05 BR BR9505670A patent/BR9505670A/en not_active IP Right Cessation
- 1995-12-05 CN CN95121880A patent/CN1059467C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102482723A (en) * | 2009-09-02 | 2012-05-30 | 安赛乐米塔尔研究与发展有限责任公司 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
| CN106282451A (en) * | 2009-09-02 | 2017-01-04 | 安赛乐米塔尔研究与发展有限责任公司 | Reduce the method for the CO2 emission of blast furnace and relevant device |
| CN104862435A (en) * | 2009-10-29 | 2015-08-26 | 杰富意钢铁株式会社 | Method For Operating Blast Furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059467C (en) | 2000-12-13 |
| JPH08157914A (en) | 1996-06-18 |
| BR9505670A (en) | 1997-11-04 |
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