CN201615893U - Device for measuring coke reactivity - Google Patents
Device for measuring coke reactivity Download PDFInfo
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- CN201615893U CN201615893U CN2009202807147U CN200920280714U CN201615893U CN 201615893 U CN201615893 U CN 201615893U CN 2009202807147 U CN2009202807147 U CN 2009202807147U CN 200920280714 U CN200920280714 U CN 200920280714U CN 201615893 U CN201615893 U CN 201615893U
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- coke
- thermal analyzer
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Abstract
The utility model provides a device for measuring the coke reactivity. The main equipment comprises a reaction gas cylinder, a gas valve, a gas purification device, a microcomputer differential thermal analyzer and a tail gas processing device, wherein a crucible accommodating a charred coal sample is arranged at one end of a differential thermal balance of the microcomputer differential thermal analyzer, an empty crucible used for comparison is arranged at the other end thereof, gas in the gas cylinder passes the gas purification device at first and is then communicated to the gas inlet of the microcomputer differential thermal analyzer after being dehumidified, the gas outlet of the microcomputer differential thermal analyzer is communicated with the tail gas processing device, and the microcomputer differential thermal analyzer is further connected with a temperature control device and a gas control device, and is connected with a computer. The utility model has simple operation, easy operation, small-sized test equipment and small occupied area, and more importantly, does not generate large amounts of toxic gases like CO during the test process, thereby resulting in good safety.
Description
Technical field
The utility model relates to the determinator of coke quality in the blast furnace ironmaking, particularly a kind of coke reactivity determinator.
Background technology
The pig iron of China more than 90% is all produced by blast furnace at present, and coke is a requisite raw material in the blast furnace production.3 effects below coke mainly plays in blast furnace: (1) reductive agent; (2) fuel; (3) skeleton, skeleton function wherein is of paramount importance, because it is to guarantee that blast furnace has precondition well ventilative, liquid permeability, does not up to the present also find effective substitute that can play same purpose.Weigh the skeleton function of coke, the general employing measured its method reactive and post-reaction strength, adopts GB GB/T 4000-2008 usually, utilize GB/T 4000-2008 research coke reactivity, the process complexity needs amount of coke many, and it is bigger influenced by human factor.
CN2613737 discloses novel movable formula coke thermal response trial furnace, relates to the high temperature reaction stove that detects coke reactivity and post-reaction strength.It solves the furnace shell take at present and furnace bottom heat-insulation layer when being overall fixed and furnace shell bottom for the existing replacing high aluminum pipe of the version of integrally closed will be with the body of heater overall pulling down, to keep in repair the rear furnace body heat-insulating property poor, causes to the consistance of determination data problems such as influential and maintenance cost height.Its solution: this device comprises furnace shell (1), be installed in the high aluminum pipe (2) that is wound with siderochrome aluminium stove silk, the light weeight alumina brick layer (3) of building by laying bricks or stones between furnace shell (1) and high aluminum pipe (2) in the furnace shell (1), be fixed on the heat-insulation layer (4) of furnace shell (1) inner bottom part and be fixed on wheel (5) bottom the furnace shell (1), it is in furnace shell (1) bottom processing porose (6), heat-insulation layer (4) is processed into fixedly heat-insulation layer (7) and dismountable movable heat-insulation layer (8), at furnace shell (1) outer bottom fixed dam support (9), baffle plate (10) is connected on the barrier support (9).
Summary of the invention
Utilize GB/T 4000-2008 research coke reactivity at prior art, the process complexity needs amount of coke many, is subjected to human factor to influence bigger deficiency in the process of the test, and the utility model provides a kind of determinator of measuring coke reactivity.
The technical solution of the utility model is described in detail as follows:
The coke reactivity determinator, comprise main equipment, electric body control system and computer data monitoring and disposal system, wherein, main equipment comprises the reaction gas cylinder, air valve, gas cleaning unit, the microcomputer differential thermal analyzer, exhaust gas processing device, it is characterized in that placing the crucible that the coke sample is housed at an end of the differential thermal balance of microcomputer differential thermal analyzer, the other end is placed the empty crucible of contrast, gas in the gas cylinder at first passes through gas cleaning unit, removes moisture after snorkel is communicated on the microcomputer differential thermal analyzer air intake opening, and microcomputer differential thermal analyzer gas outlet is communicated with exhaust gas processing device, also be connected to temperature control equipment and gas control equipment on the microcomputer differential thermal analyzer and be connected, be used for the experimental data collection with computing machine, control.
Described crucible internal diameter 4～6mm, high 1～6mm, material is 95wt%Al
2O
3:
Gas in the gas cylinder is industrial CO
2(CO
2Content is greater than 99%).Remove moisture in the gas with anhydrous silica gel in the described gas cleaning unit.
Used computer configuration requires hard disk greater than 20G in the experimental provision of the present utility model, and internal memory is greater than 256M, and 32M independence video card is configured to.
Experimental provision of the present utility model is measured the method for coke reactivity, be to adopt the weightless equipment of differential thermal to measure, mainly based on the thermogravimetry (TG) theory, temperature data of gathering in the course of reaction and weight data, by mathematics manipulation obtain weight with variation of temperature curve and weight rate with the variation of temperature curve.Is thermogravimetric curve (TG curve) by the weight change of thermogravimetry (TG) record to the relation curve of temperature, also can obtain data such as sample composition, thermal stability, thermal decomposition product and kinetics of thermal decomposition from the TG curve.Step is as follows:
Sample thief coke 100～500g utilizes drying box all to be crushed to 20～156 μ m behind the dry 1h down at 105 ℃; Get broken good coke 30～200mg and put into crucible, crucible is put into the microcomputer differential thermal analyzer, the heating rate intensification by 5～30 ℃/min is warming up to 700～1100 ℃, logical N in this temperature-rise period
2Protection; Treat that temperature is raised to 700～1100 ℃ and stops logical N
2, begin logical CO
2, CO
2Flow control is at 30～100mL/min, and heating rate is controlled at 1～10 ℃/min, and the reaction time is 30～180min; When temperature of reaction arrives 900～1300 ℃ of set points of temperature, stop to heat up, stop logical CO
2, logical again N
2Cool to room temperature.
By the temperature and the weight data of microcomputer differential thermal analyzer record in the above process are handled, do temperature-weight distribution curve, curve is done slope be-1 tangent line, find out point of contact institute corresponding temperature, point of contact institute corresponding temperature is that coke gasification reaction begins temperature.This temperature is the measurement foundation of sample coke reactivity, promptly begins temperature by coke gasification reaction and just weighs the reactive strong and weak of coke.
Begin the foundation of the height of temperature as measurement coke reactivity quality with coke gasification reaction: in some different sample coke, record the low coke of reaction beginning temperature, its reactivity is good, is easy to and CO
2Molten damage reaction takes place, and reaction back coke strenth is lower, may cause adverse effect to blast furnace process; Reaction beginning temperature is than higher coke, and its reactivity is relatively poor, is difficult for and CO
2Take place, its post-reaction strength is higher, can guarantee that blast furnace has air permeability and good, and is favourable to the normal smelting of blast furnace.
The coke gasification reaction that records with the utility model begins temperature and has good consistance with the measured coke gasification reaction sex index result of GB/T 4000-2008, as shown in Figure 2.What Fig. 2 represented is the reactivity indexes of 12 kinds of different sample coke and the relation that coke gasification reaction begins temperature.STRENGTH ON COKE reactivity indexes and its coke gasification reaction begin the test findings of temperature and carry out linear regression, obtain the monobasic linear equation of the two, Y=1074.25-6.47X, and related coefficient is 0.978.From two kinds of experimental technique gained results, the reactivity indexes of coke begins temperature with coke gasification reaction and presents consistent regularity, and promptly the reactivity indexes along with coke raises, and corresponding coke gasification reaction begins temperature and reduces gradually.All there is such rule between the coke of dissimilar coke and the different amount of absorption mineral matter.Analyze from reaction mechanism, on the one hand, the reduction of the molten damage temperature of reaction of coke can make coke and CO
2Between gasification reaction generation early, the molten damage process of coke itself is aggravated, the degradation phenomena of coke is more remarkable; On the other hand, the reduction that coke gasification reaction begins temperature can make on the position, direct reducing zone and move, and the consumption of blast furnace available heat increases, the indirect like this consumption that increases the blast furnace reductive agent, and coke ratio also can correspondingly raise.
What GB GB/T 4000-2008 adopted is as the quality of weighing coke reactivity with the weight-loss ratio under the certain hour uniform temperature, and the utility model using method is with under certain heating rate, coke begins that pairing temperature begins temperature of reaction as coke when violent weightless, with the height of beginning temperature of reaction as the index of weighing the coke reactivity quality.
That determinator of the present utility model has is simple to operate, be easy to grasp, and can truly reflect the situation of coke in blast furnace.It is little that this device has an area occupied, especially can not produce toxic gases such as a large amount of CO in process of the test, and security is good, and test findings and GB/T 4000-2008 have good consistance.Can be widely used in factory, school and scientific research institutions.
Description of drawings
Fig. 1 is the utility model coke reactivity determinator synoptic diagram.1. reaction gas cylinder, 2. air valve, 3. gas cleaning unit, 4. thermobalance, 5. crucible, 6. coke sample, the 7. empty crucible of contrast, 8. exhaust gas processing device, 9. temperature control equipment, 10. gas control equipment, 11. computer result harvesters.
Fig. 2 is the reactivity indexes of 12 kinds of sample coke and the relation that coke gasification reaction begins temperature.Horizontal ordinate is coke gasification reaction sex index (%), according to GB/T 4000-2008 standard detection; Ordinate be the reaction of sample coke begin temperature (℃), detect with the device and method of the utility model embodiment 1.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
One, coke reactivity determinator
Structure as shown in Figure 1, one end of the differential thermal balance 5 of microcomputer differential thermal analyzer 4 is placed the crucible 6 that coke sample 7 is housed, the other end is placed and is contrasted with empty crucible 8, gas in the gas cylinder 1 at first passes through gas cleaning unit 3, gas cleaning unit 3 use anhydrous silica gels are removed the moisture in the gas, the gas of removing behind the moisture is communicated on microcomputer differential thermal analyzer 4 air intake openings through snorkel, microcomputer differential thermal analyzer gas outlet is communicated with exhaust gas processing device 8, microcomputer differential thermal analyzer 4 is connected to temperature control equipment 9 and gas control equipment 10, and temperature control equipment 9 all is connected with computing machine 11 with the experimental data collection with gas control equipment 10.The internal diameter 5mm of described crucible 6,8, high 4mm, material is 95wt%Al
2O
3, test used CO
2Be content 99% industrial CO
2Used computer configuration requires hard disk 20G, internal memory 256M, the configuration of 32M independence video card.
Two, coke reactivity assay method uses above-mentioned experimental provision to measure, and the coke sample is that Laiwu Iron Co., Ltd. produces dry coke quenching.
Get representational coke 500g, put into baking oven, oven dry is 2 hours under 105 ℃ of temperature, broken after cooling, and cross 200 order mesh screens fully, make the fine particle of granularity less than 74 μ m, sampling is weighed then, the weight of every duplicate samples is respectively 150mg, gets 3 parts of coke samples altogether ready, and label is 1#, 2#, 3# respectively.
The coke sample is put into crucible 6, differential thermal balance 5 is carried out program setting, heat up and be divided into three sections: first section: in the time of 0～700 ℃, 20 ℃/min of heating rate; Second section: 700 ℃ of constant temperature, time 30min; The 3rd section: 700～1200 ℃.The N of first section interior logical 20mL/min of temperature range
2Protect, since second section CO that changes logical 40mL/min
2, make it with crucible 6 in coke sample 7 the bohrs reaction takes place.Wait to reach 1000 ℃ of set points of temperature, stop to heat up, change logical N
2Protection is handled the data of gathering simultaneously, tries to achieve coke and begins temperature of reaction.Treat that temperature drops to below 200 ℃ in the differential thermal balance, repeat above-mentioned steps.Every duplicate samples is surveyed three times, asks its mean value.Test findings is shown in Table 1.
Table 1 Laigang dry coke quenching begins the temperature of reaction measurement result
| Test sequence number (inferior) | 1 | 2 | 3 | |
| 1# begins temperature of reaction ℃ | 926 | 921 | 918 | 923 |
| 2# begins temperature of reaction ℃ | 899 | 906 | 916 | 907 |
| 3# begins temperature of reaction ℃ | 906 | 909 | 921 | 912 |
As described in embodiment 1, difference is that the coke sample is that Jinan Iron ﹠ Steel Group Corporation produces dry coke quenching, measures by the step of embodiment 1, and test findings is shown in Table 2.
Table 2 Ji steel dry coke quenching begins the temperature of reaction measurement result
| The |
1 | 2 | 3 | |
| 1# begins temperature of reaction ℃ | 881 | 877 | 884 | 881 |
| 2# begins temperature of reaction ℃ | 916 | 926 | 912 | 918 |
| 3# begins temperature of reaction ℃ | 888 | 898 | 902 | 896 |
As can be seen from the above embodiments: use novel coke reactivity measuring method can effectively measure the reactivity of different coke, and can be analyzed, for iron and steel enterprise buying coke and performance evaluation thereof provide another kind of criteria of quality evaluation.
Claims (2)
1. coke reactivity determinator, comprise main equipment, electric body control system and computer data monitoring and disposal system, wherein main equipment comprises the reaction gas cylinder, air valve, gas cleaning unit, the microcomputer differential thermal analyzer, exhaust gas processing device, it is characterized in that, end in the differential thermal balance of microcomputer differential thermal analyzer is placed the crucible that the coke sample is housed, the other end is placed the empty crucible of contrast, gas in the gas cylinder at first passes through gas cleaning unit, remove moisture after snorkel is communicated on the microcomputer differential thermal analyzer air intake opening, microcomputer differential thermal analyzer gas outlet is communicated with exhaust gas processing device, also is connected to temperature control equipment and gas control equipment on the microcomputer differential thermal analyzer and is connected with computing machine.
2. determinator as claimed in claim 1 is characterized in that described crucible internal diameter 4～6mm, high 1～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202807147U CN201615893U (en) | 2009-12-09 | 2009-12-09 | Device for measuring coke reactivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202807147U CN201615893U (en) | 2009-12-09 | 2009-12-09 | Device for measuring coke reactivity |
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|---|---|
| CN201615893U true CN201615893U (en) | 2010-10-27 |
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| CN2009202807147U Expired - Fee Related CN201615893U (en) | 2009-12-09 | 2009-12-09 | Device for measuring coke reactivity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768161A (en) * | 2012-08-15 | 2012-11-07 | 重庆大学 | Experimental device and method for performing on-line monitoring on lump coal splitting decomposition |
| CN105823849A (en) * | 2016-04-21 | 2016-08-03 | 安徽绿洲技术服务有限公司 | Purifying device for carrier gas of gas chromatograph |
| CN109490360A (en) * | 2018-12-29 | 2019-03-19 | 中国科学技术大学 | It is a kind of suitable for large sample amount, more atmosphere can be with differential thermal analysis device |
-
2009
- 2009-12-09 CN CN2009202807147U patent/CN201615893U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768161A (en) * | 2012-08-15 | 2012-11-07 | 重庆大学 | Experimental device and method for performing on-line monitoring on lump coal splitting decomposition |
| CN105823849A (en) * | 2016-04-21 | 2016-08-03 | 安徽绿洲技术服务有限公司 | Purifying device for carrier gas of gas chromatograph |
| CN109490360A (en) * | 2018-12-29 | 2019-03-19 | 中国科学技术大学 | It is a kind of suitable for large sample amount, more atmosphere can be with differential thermal analysis device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JINAN IRON AND STEEL CO LTD Free format text: FORMER OWNER: LAIWU IRON CO., LTD. Effective date: 20120328 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 271104 LAIWU, SHANDONG PROVINCE TO: 250101 JINAN, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120328 Address after: 250101 Ji'nan Industrial Road, Shandong, No. 21 Co-patentee after: University of Science and Technology Beijing Patentee after: Jinan Iron and Steel Co., Ltd. Address before: 271104, Xinxing Road, Gangcheng District, Shandong, Laiwu, 21 Co-patentee before: University of Science and Technology Beijing Patentee before: Laiwu Iron Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: SHANDONG IRON + STEEL CO., LTD. Free format text: FORMER NAME: JINAN IRON AND STEEL CO LTD |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 250101 Ji'nan Industrial Road, Shandong, No. 21 Co-patentee after: University of Science and Technology Beijing Patentee after: Shandong Iron & Steel Group Co., Ltd. Address before: 250101 Ji'nan Industrial Road, Shandong, No. 21 Co-patentee before: University of Science and Technology Beijing Patentee before: Jinan Iron and Steel Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20111209 |