CN102980883A - Device and method for measuring reactivity of unburned coal powder of blast furnace - Google Patents
Device and method for measuring reactivity of unburned coal powder of blast furnace Download PDFInfo
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- CN102980883A CN102980883A CN2012104725561A CN201210472556A CN102980883A CN 102980883 A CN102980883 A CN 102980883A CN 2012104725561 A CN2012104725561 A CN 2012104725561A CN 201210472556 A CN201210472556 A CN 201210472556A CN 102980883 A CN102980883 A CN 102980883A
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Abstract
The invention provides a device and a method for measuring the reactivity of unburned coal powder of a blast furnace. The device comprises a part for supplying a gas source, a drying system, a flowmeter, a high-temperature heating furnace and an infrared gas analyzer, wherein the part, the drying system, the flowmeter, the high-temperature heating furnace and the infrared gas analyzer are sequentially connected with one another through connection pipes. By the device and the method for measuring the reactivity of the unburned coal powder of the blast furnace, the gasifying reaction temperature can be adjusted; the reactivity of the unburned coal powder under conditions of different atmospheres and different spraying coal ratios can be measured; and the device and the method can be used for guiding the selection of spraying coals of the blast furnace.
Description
Technical field
The present invention relates to the pulverized coal injection into blast furna technical field, particularly the reactive determinator of a kind of blast furnace unburned coal powder and method.
Background technology
At present, blast furnace is all improving injecting coal quantity both at home and abroad, and external coal is more commonplace than 200kg/t, and domestic advanced person's blast furnace has also reached this index, and the proportion of coal steadily improves in the blast furnace fuel structure.During Injection of Large Quantity of Coal Powder In B. F, if coal dust can not perfect combustion in air port convolution district, form unburned coal powder, will affect the blast furnace process process.Unburned coal powder can especially be piled up at the soft melt zone place in blast furnace above after a certain amount of.It is all unfavorable to blast furnace operating to rest in the stove what zone, causes slag iron discharging difficulty, and furnace charge air permeability descends, and pressure drop in furnace is unstable, destroys the coal gas reasonable layout, and coal dust contacts with slag at the furnace wall place, makes its retrogradation, and it is thick to cause furnace wall to be tied.
Because the winding-up Coal rank, unburned coal powder has different reactivities, must consider during big coal injection that the reactive difference of different unburned coal powders is on the impact of blast furnace ironmaking process.The reactivity of unburned coal powder is higher, and the protective effect of STRENGTH ON COKE is just more obvious; Unburned coal powder gasification rate in stove that its hypoergy is high is fast, and the consumption of can gasifying rapidly is unlikely with the coal gas effusion, can allow blast furnace to improve coal powder blowing amount; In addition, under the Injection of Large Quantity of Coal Powder condition, the reactivity of unburned coal powder also will produce significant impact to the division of blast furnace reducing zone.
But in today of Injection of Large Quantity of Coal Powder briquet replacing coke, also do not have simple and effective method, the reactivity of blast furnace unburned coal powder in blast furnace made assessment.
Summary of the invention
Technical matters to be solved by this invention provides the reactive determinator of a kind of blast furnace unburned coal powder and method, and having solved under the background of present briquet replacing coke does not have the reactive determinator of simple and effective unburned coal powder and method.
For solving the problems of the technologies described above, the invention provides the reactive determinator of a kind of blast furnace unburned coal powder, comprise the parts that source of the gas is provided, drying system, flowmeter, safety valve, high-temperature heater and the infrared gas analyzer that are linked in sequence with connecting pipe.
Further, this device also comprises mixed gas cylinder, and the two is connected itself and described flowmeter, safety valve respectively.
Further, this device also includes computing machine, and it is connected by data line with described infrared gas analyzer.
In order to solve the problem to be solved in the present invention, the present invention also provides the blast furnace unburned coal powder reactive assay method, comprises: produce unburned coal powder; Under the same conditions, measure object of reference sample or described unburned coal powder sample CO and CO when oxidation reaction is stablized
2Gaseous phase partial pressure, described the same terms comprises identical gas and passes into speed, the identical rate of heat addition, identical constant temperature time and identical oxidation reaction endpoint standard; Adopt formula
Calculate, draw the reactivity of described unburned coal powder, wherein, the f-unburned coal powder is reactive; P
COCO dividing potential drop in the-gas phase;-
CO in the gas phase
2Dividing potential drop.
Further, under the same conditions described, measure object of reference or described unburned coal powder CO and CO when oxidation reaction is stablized
2Gaseous phase partial pressure comprise:
Reaction tube to described high-temperature heater passes into nitrogen, together high-temperature heater is heated to test temperature, and one section duration of constant temperature;
Put into described reaction tube with reference to thing sample or described unburned coal powder sample, then pass into CO
2+ CO mixed gas;
Adopt the gas after the described infrared gas analyzer continuous monitoring oxidation reaction to change, when the Exhaust Gas stable components, be the oxidation reaction terminal point,
At the terminal point of described oxidation reaction, CO and CO in record atmosphere this moment
2Composition obtains object of reference sample or unburned coal powder sample and CO
2CO after the oxidation reaction and CO
2Composition and pressure.
Further, described oxidation reaction terminal point is with CO after the oxidation reaction or CO
2The rate of change of gas componant is judged.
Further, described oxidation reaction terminal point namely
Wherein,
The rate of change of expression CO dividing potential drop.
Further, described object of reference is coke.
Further, described test temperature is 1100 ℃.
Further, the duration of described constant temperature is 20min.
The reactive determinator of blast furnace unburned coal powder provided by the invention and method, can carry out initial atmosphere composition to the impact research of unburned coal powder oxidation, the oxidation comparative studies of different unburned coal powders, the amount of unburned coal powder is on the impact research of the oxidation reaction of carbon, these apparatus and method have been enriched the research contents of laboratory experiment, perfect laboratory study means.
Description of drawings
The structural representation of the reactive determinator of blast furnace unburned coal powder that Fig. 1 provides for the embodiment of the invention;
Wherein, 1-provides the parts of source of the gas, the 2-drying system, and the 3-flowmeter, the 4-rubber tube, 5-mixes gas cylinder, 6-safety valve, 7-high-temperature heater, 8-sample, 9-infrared gas analyzer, 10-data line, 11-computing machine.
Embodiment
Referring to Fig. 1, the reactive determinator of blast furnace unburned coal powder and method that the embodiment of the invention provides, can regulate temperature of reaction, can measure under the different atmosphere with different injection coals than under the reactivity of unburned coal powder.
The reactive determinator of blast furnace unburned coal powder that the embodiment of the invention provides comprises the parts that source of the gas is provided 1, drying system 2, flowmeter 3, mixed gas cylinder 5, safety valve 6, high-temperature heater 7, infrared gas analyzer 9, data line 10 and the computing machine 11 that are linked in sequence with rubber tube 4;
N is provided
2, CO and CO
2The parts 1 of source of the gas are connected with corresponding drying system 2 respectively, guarantee to test gases used moisture-free.Flowmeter 3 is regulated respectively the ratio of three kinds of gases.Between mixed gas cylinder 5 and the high-temperature heater 7 safety valve 6 is set.The gas that produces after the oxidation reaction connects infrared gas analyzer 9, changes by the reacted gas of infrared gas analyzer 9 continuous monitorings.Infrared gas analyzer 9 is connected with computing machine 11 by data line 10, and computing machine 11 is by reading coke and unburned coal powder CO and CO after oxidation reaction
2Gaseous phase partial pressure, then calculate the reactivity of unburned coal powder.
In order to solve the problem to be solved in the present invention, the present invention also provides the blast furnace unburned coal powder reactive assay method, comprises:
At first, utilize two sections electrical heating coal dust firing experimental provisions to obtain products of combustion, after the products of combustion drying as unburned coal powder; The tube inner diameter of high-temperature heater 7 is 25mm, passes into nitrogen with the gas flow of 120ml/min, and reacting furnace is heated to 1100 ° of C of test temperature, constant temperature 20min with the heating rate of 20 ° of C/min; 15 gram coke specimens 8 are put into reaction tube, then pass into CO
2With the mixed gas of CO, gas flow is 120ml/min; Adopt the reacted gas componant of infrared gas analyzer 9 continuous monitorings to change, after the Exhaust Gas stable components, namely
The time, as the oxidation reaction terminal point; CO and CO during computing machine 11 record oxidation reaction terminal point in the atmosphere
2Composition obtains coke and CO
2CO after the oxidation reaction and CO
2Composition and pressure; When question response pipe temperature is cooled to room temperature, pass into nitrogen with the gas flow of 120ml/min, reacting furnace is heated to 1100 ℃ of test temperatures with the heating rate of 20 ℃/min, constant temperature 20min puts into reaction tube with 15 gram unburned coal powder samples 8, then passes into CO
2+ CO mixed gas obtains unburned coal powder and CO
2CO after oxidation reaction and CO
2Composition; Computing machine is according to the coke that reads respectively and unburned coal powder CO and CO when the oxidation reaction terminal point
2Gaseous phase partial pressure, calculate the f value according to formula (1):
Wherein, the f-unburned coal powder is reactive, P
COCO dividing potential drop in the-gas phase;
CO in the-gas phase
2Dividing potential drop.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to example the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the reactive determinator of blast furnace unburned coal powder is characterized in that, comprises the parts that source of the gas is provided, drying system, flowmeter, high-temperature heater and the infrared gas analyzer that are linked in sequence with connecting pipe.
2. the reactive determinator of blast furnace unburned coal powder as claimed in claim 1 is characterized in that, also comprises mixed gas cylinder, and the two is connected itself and described flowmeter, high-temperature heater respectively.
3. the reactive determinator of blast furnace unburned coal powder as claimed in claim 1 is characterized in that, also includes computing machine, and it is connected by data line with described infrared gas analyzer.
4. be used for the assay method such as the reactive determinator of each described blast furnace unburned coal powder of claims 1 to 3, it is characterized in that, comprise: under the same conditions, measure object of reference sample or described unburned coal powder sample CO and CO when oxidation reaction is stablized
2Gaseous phase partial pressure, described the same terms comprises identical gas and passes into speed, the identical rate of heat addition, identical constant temperature time and identical oxidation reaction endpoint standard; Adopt formula
Calculate, draw the reactivity of described unburned coal powder, wherein, the f-unburned coal powder is reactive, P
COCO dividing potential drop in the-gas phase,
CO in the-gas phase
2Dividing potential drop.
5. the reactive assay method of blast furnace unburned coal powder as claimed in claim 4 is characterized in that, and is under the same conditions described, measures object of reference sample or described unburned coal powder sample CO and CO when oxidation reaction is stablized
2Gaseous phase partial pressure comprise:
Reaction tube to described high-temperature heater passes into nitrogen, simultaneously high-temperature heater is heated to test temperature, and one section duration of constant temperature;
Put into described reaction tube with reference to thing sample or described unburned coal powder sample, then pass into CO
2+ CO mixed gas;
Adopt the gas after the described infrared gas analyzer continuous monitoring oxidation reaction to change, when the Exhaust Gas stable components, be the oxidation reaction terminal point;
At the terminal point of described oxidation reaction, CO and CO in record atmosphere this moment
2Composition obtains object of reference sample or unburned coal powder sample and CO
2CO after the oxidation reaction and CO
2Composition and pressure.
6. the reactive assay method of blast furnace unburned coal powder as claimed in claim 4 is characterized in that, described oxidation reaction terminal point is with CO after the oxidation reaction or CO
2The rate of change of gas componant is judged.
7. the reactive assay method of blast furnace unburned coal powder as claimed in claim 4 is characterized in that, described oxidation reaction terminal point namely
Wherein,
The rate of change of expression CO dividing potential drop.
8. the reactive assay method of blast furnace unburned coal powder as claimed in claim 4 is characterized in that described object of reference is coke.
9. the reactive assay method of blast furnace unburned coal powder as claimed in claim 5 is characterized in that, described test temperature is 1100 ℃.
10. the reactive assay method of blast furnace unburned coal powder as claimed in claim 5 is characterized in that, the duration of described constant temperature is 20min.
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| CN2012104725561A CN102980883A (en) | 2012-11-20 | 2012-11-20 | Device and method for measuring reactivity of unburned coal powder of blast furnace |
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| CN2012104725561A CN102980883A (en) | 2012-11-20 | 2012-11-20 | Device and method for measuring reactivity of unburned coal powder of blast furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833605A (en) * | 2015-05-20 | 2015-08-12 | 华北电力科学研究院有限责任公司 | Test equipment and method for burnout time of large granular fuel in fluidized bed |
Citations (5)
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| US3720351A (en) * | 1971-05-06 | 1973-03-13 | Babcock & Wilcox Co | Pulverized fuel delivery system for a blast furnace |
| CN101038276A (en) * | 2006-03-15 | 2007-09-19 | 鞍钢股份有限公司 | Method and device for detecting combustion performance of pulverized coal |
| WO2011052795A1 (en) * | 2009-10-29 | 2011-05-05 | Ｊｆｅスチール株式会社 | Method for operating blast furnace |
| CN102539621A (en) * | 2012-01-10 | 2012-07-04 | 河北联合大学 | Method and equipment for detecting burning rate of pulverized coal |
| CN202430239U (en) * | 2011-12-09 | 2012-09-12 | 首钢总公司 | Experimental device for stimulating burning of pulverized coal sprayed and blown by blast furnace |
-
2012
- 2012-11-20 CN CN2012104725561A patent/CN102980883A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720351A (en) * | 1971-05-06 | 1973-03-13 | Babcock & Wilcox Co | Pulverized fuel delivery system for a blast furnace |
| CN101038276A (en) * | 2006-03-15 | 2007-09-19 | 鞍钢股份有限公司 | Method and device for detecting combustion performance of pulverized coal |
| WO2011052795A1 (en) * | 2009-10-29 | 2011-05-05 | Ｊｆｅスチール株式会社 | Method for operating blast furnace |
| CN202430239U (en) * | 2011-12-09 | 2012-09-12 | 首钢总公司 | Experimental device for stimulating burning of pulverized coal sprayed and blown by blast furnace |
| CN102539621A (en) * | 2012-01-10 | 2012-07-04 | 河北联合大学 | Method and equipment for detecting burning rate of pulverized coal |
Non-Patent Citations (3)
| Title |
|---|
| HUTNY WP ET AL.: "Fundamentals of coal combustion during injection into a blast furnace", 《PROGRESS IN ENERGY AND COMBUSTION SCIENCE》 * |
| 郁庆瑶 等: "未燃煤粉对炉内焦炭反应性能影响的试验研究", 《宝钢技术》 * |
| 高斌 等: "高炉未燃煤粉活性试验研究", 《炼铁》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833605A (en) * | 2015-05-20 | 2015-08-12 | 华北电力科学研究院有限责任公司 | Test equipment and method for burnout time of large granular fuel in fluidized bed |
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Application publication date: 20130320 |