CN101121949A - Method for measuring blast furnace convolution region length - Google Patents
Method for measuring blast furnace convolution region length Download PDFInfo
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- CN101121949A CN101121949A CNA2007101222381A CN200710122238A CN101121949A CN 101121949 A CN101121949 A CN 101121949A CN A2007101222381 A CNA2007101222381 A CN A2007101222381A CN 200710122238 A CN200710122238 A CN 200710122238A CN 101121949 A CN101121949 A CN 101121949A
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Abstract
A method of measuring the length of blast furnace raceway belongs to the field of blast furnace iron making, and provides reliable basis for judging whether charging materials are fed without any trouble during blast furnace manufacturing. The detailed measuring procedures include: (1) sampling: making and numbering coke samples at different positions along the diameter of the blast furnace in a tuyere zone of blast furnace; (2) calculating porosity of all the grain size of the tuyere coke samples; (3) graphing and connecting lines where porosity is defined as a vertical ordinate and the different sampling positions in front of the tuyere defined as a horizontal ordinate; (4) finding out a certain point in the coordinate graph at which the porosity of the tuyere coke samples suddenly drops and the point is a central point of every location sampling through; the point at which the porosity of the tuyere coke samples suddenly drops plus half length of the location sampling trough positioned at the point is the length of blast furnace raceway. The method of the invention is simple and practical.
Description
Technical field
The invention belongs to the blast furnace ironmaking field, particularly a kind of method of measuring blast furnace convolution region length.
Background technology
Blast furnace convolution region length is to judge a whether important parameter of direct motion of furnace charge in the blast furnace production process
Though in metallurgy industry, the method for measuring the blast-furnace tuyere convolution region length is a lot of at present, equipment used is relatively more expensive usually, and method is also comparatively complicated.By the voidage of coke in the acoustic wind oral examination sample, extrapolate blast-furnace tuyere circle round the district length be undoubtedly a kind of simple and practical method.Adopt present metallurgy industry to measure and also do not have the clear and definite national standard of a cover for the voidage of coke in the sample of air port.Factory or the method that laboratory test adopted all are that the result according to existence conditions and actual needs gropes out, do not have ubiquity.And when measuring the coke voidage, the STRENGTH ON COKE granularity has certain restriction, and the concrete scope of restriction is also uncertain.All can't measure the voidage of fine powder and big lump coke in the method for all mensuration coke voidages, especially its granularity of coke in the sample of air port is uneven, existing powder has big lump coke again, measures needs with regard to being difficult to find a kind of suitable method to satisfy in this case.So the data of its coke voidage that records are often not accurate enough when factory or laboratory test, and bigger error is arranged.
Summary of the invention
The present invention seeks in order to find out a kind of method that can accurately measure the coke voidage, thereby further calculate the blast-furnace tuyere convolution region length, for judging in the blast furnace production process whether direct motion provides reliable basis to furnace charge.
Some is different for the residing situation of coke of district and dead stock column (containing the Bird's Nest district) of circling round in blast furnace production, and dead stock column (the containing the Bird's Nest district) time that coke stops before the air port is longer, and the time of the coke of tuyere zone stop will lack.The district does not have the coke of stop basically because blast furnace circles round when producing, and the coke that the air port sampling is taken out is the part that damping down falls from the top, district of circling round.The voidage of considering coke in the sample of air port this characteristics that can diminish suddenly in a certain position, the length in the district that can determine to circle round before the blast-furnace tuyere.
A kind of method of measuring blast furnace convolution region length, its measuring process is:
1. sampling: get coke specimen and numbering from the blast-furnace tuyere district along the different positions of blast furnace diameter;
2. calculate the voidage of the whole granularities of coke in the sample of air port;
3. be ordinate zou with the voidage, different sample position are that X-coordinate is done figure and line before the air port;
4. unexpected reduction can take place during a certain position in the voidage of air port sample coke before arriving the air port, from the variation of coordinate diagram, find out the position of catastrophe point and pairing sample, this position is the central position of each position sample groove, the position that the voidage of the sample coke that finds from X-coordinate reduces suddenly add this position sample slot length half be blast furnace convolution region length.
The concrete measuring method of coke voidage is as follows:
Archimedes' principle is adopted in the voidage test, in the known vessel volume, gets rid of consubstantiality ponding by coke in the sample of adding solid air port and determines its proportion and voidage.Because coke granule has certain space, particularly the process before furnace roof adds arrival air port, back, coke voidage in the sample of air port diminishes, find by pilot study, in acoustic wind oral examination sample, it to be soaked in water 2 days before the coke voidage, make the pore of coke in the sample of air port be full of water fully.Concrete grammar is as follows:
(1) proportion of known water is 1g/ml.
(2) pallet is placed on the balance zero clearing.
(3) volume of mensuration measuring device: at first, weigh up the weight of measuring device.After the measuring device topped up with water, weighed amount.The difference of twice weight promptly gets the volume of measuring device divided by the proportion of water.
(4) volume, the void volume of mensuration coke:
1. weigh up and do burnt weight, be contained in respectively in the container, soaked one day.
2. measuring device is placed on the pallet zero clearing.
3. coke is packed in the measuring device, bring water as far as possible less into.Smooth, compacting, be recorded as weight one.
4. in measuring device, add water, just cover full coke to water till, be recorded as weight two.Weight two deducts weight one and promptly wins and time add water weight, divided by the proportion of water, the volume of water, this volume is void volume between the coke.
5. continue in measuring device, to add water, till full, note and be weight three.Weight three is deducted weight one,, obtain adding the cumulative volume of water then divided by the proportion of water.Volume with measuring device deducts the volume that the cumulative volume that adds entry promptly gets coke.
Because in the process of the test＜and fine particle among the 2.5mm can waft and together be lost with water on the water surface, and " and mud " phenomenon may take place in addition, and smallest particles selected in mensuration is 2.5mm.The voidage of coke will be considered in sample＜influence of 2.5mm particulate in the sample of air port.More fine powder is arranged in＜2.5mm the particulate, the space between the small-particle almost completely can be added fullly, making does not almost have the space in＜2.5mm particulate.All the voidage of coke sizes have a competition test fixed＞value of 2.5mm coke size is little, the calculation formula of the voidage of the whole granularities of coke is as follows in the sample of air port:
ε
The whole particles that calculate=(1-χ %) * ε
Measure(5)
ε wherein
The whole particles that calculateThe voidage of the whole granularities of expression coke; ε
MeasureExpression goes out＞voidage of 2.5mm coke size by this technical measurement; χ % represents＜percentage composition of 2.5mm coke granule.
The present invention is simple, practical, can accurately measure the coke voidage, thereby further calculates the blast-furnace tuyere convolution region length, for judging in the blast furnace production process whether direct motion provides reliable basis to furnace charge.
Description of drawings
Fig. 1 is two straight lines of coke voidage in the sample of different zones air port before the air port
Embodiment
Table 1 is made in sampling before certain factory's blast-furnace tuyere, and the coke mean diameter is that the 14.2mm place is divided into two sections mappings with the voidage data in the sample of air port, has obtained two matches straight line preferably.
The distance of the burnt sample of each number before the air port in the sample of table 1 air port
| Numbering | Air port front distance m | Voidage |
| 1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9 # 10 # 11 # 12 # 13 # 14 # | 0.29 0.58 0.87 1.16 1.45 1.74 2.03 2.32 2.61 2.9 3.19 3.48 3.77 4.06 | 37.66 40.69 34.59 35.05 33.27 28.41 19.51 20.08 17.89 19.93 18.34 15.85 15.62 16.7 |
Fig. 1 apoplexy oral examination sample 1.74m and 2.03m before the air port are divided into two sections with coke voidage data, have obtained two matches straight line preferably.The coke voidage of top in the straight line is all before the air port 1 among the figure
#～6
#The position, and straight line corresponding coke voidage in below is all before the air port 7
#～14
#The position.Two straight lines of coke voidage formation in the sample show that sudden change has taken place the granularity of coke in the sample of air port before the air port, and this is because two part of coke environment difference of living in blast furnace.Can think that (1.74m+0.15m)=1.89m is a convolution region length, wherein 0.15m is half of this position sample slot length.Blast furnace does not almost have coke to exist in circling round when producing and distinguishing, the air port sampling is carried out behind blast furnace staying, and top, race way coke has quite a few and drops into the district of circling round, and coke size is big relatively in the feasible taking-up sample, wearing and tearing are few, and voidage is also big.Can think equally and be dead stock column (containing the Bird's Nest district) from 1.89m, when blast furnace is produced the interior coke residence time of dead stock column (containing the Bird's Nest district) longer, it is many that coke is worn, granularity also can be smaller, voidage also can be smaller, so the voidage sudden change can take place in a certain position before the air port.
Infer the length of circling round and distinguishing before the blast-furnace tuyere, just can in blast furnace is produced, study liquid permeability about dead stock column (containing the Bird's Nest district) coke.Voidage characteristic parameter in the sample of air port is studied, be its objective is that the liquid permeability for describing air port sample coke provides necessary parameter.
Claims (2)
1. method of measuring blast furnace convolution region length is characterized in that the measuring process of blast furnace convolution region length is:
(1) .. sampling: get coke specimen and numbering from the blast-furnace tuyere district along the different positions of blast furnace diameter;
(2). calculate the voidage of the whole granularities of coke in the sample of air port;
(3). with the voidage is ordinate zou, and different sample position are that X-coordinate is done figure and line before the air port;
(4). unexpected reduction can take place during a certain position in the voidage of air port sample coke before arriving the air port, from the variation of coordinate diagram, find out the position of catastrophe point and pairing sample, this position is the central position of each position sample groove, the position that the voidage of the sample coke that finds from X-coordinate reduces suddenly add this position sample slot length half be blast furnace convolution region length.
2. measure the method for blast furnace convolution region length according to claim 1, it is characterized in that the concrete measuring method of coke voidage is as follows:
(1) weighs up the weight of doing Jiao, be contained in respectively in the container, soaked one day;
(2) measuring device is placed on the pallet zero clearing;
(3) coke is packed in the measuring device, bring water less into as far as possible, smooth, compacting, be recorded as weight one;
(4) in measuring device, add water, just cover full coke to water till, be recorded as weight two; Weight two deducts weight one and promptly wins and time add water weight, divided by the proportion of water, the volume of water, this volume is void volume between the coke;
(5) continue in measuring device, to add water, till full, note and be weight three.Weight three is deducted weight one,, obtain adding the cumulative volume of water then divided by the proportion of water.Volume with measuring device deducts the volume that the cumulative volume that adds entry promptly gets coke;
The calculation formula of the voidage of the whole granularities of coke is as follows in the sample of air port:
ε
The whole particles that calculate=(1-x%) * ε
Measure(4)
ε wherein
The whole particles that calculateThe voidage of the whole granularities of expression coke; ε
MeasureExpression goes out＞voidage of 2.5mm coke size by this technical measurement; X% represents＜percentage composition of 2.5mm coke granule.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101222381A CN100532578C (en) | 2007-09-24 | 2007-09-24 | Method for measuring blast furnace convolution region length |
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| CNB2007101222381A CN100532578C (en) | 2007-09-24 | 2007-09-24 | Method for measuring blast furnace convolution region length |
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| CN100532578C CN100532578C (en) | 2009-08-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706494A (en) * | 2016-12-09 | 2017-05-24 | 辽宁科技大学 | Determination method of material column liquid permeability index in COREX smelter-gasifier |
| CN106767611A (en) * | 2016-12-09 | 2017-05-31 | 辽宁科技大学 | A kind of assay method of COREX melting gasification furnaces Tuyere Raceway length |
| CN113362904A (en) * | 2021-05-31 | 2021-09-07 | 马鞍山钢铁股份有限公司 | Method for detecting shape of blast furnace tuyere raceway |
-
2007
- 2007-09-24 CN CNB2007101222381A patent/CN100532578C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706494A (en) * | 2016-12-09 | 2017-05-24 | 辽宁科技大学 | Determination method of material column liquid permeability index in COREX smelter-gasifier |
| CN106767611A (en) * | 2016-12-09 | 2017-05-31 | 辽宁科技大学 | A kind of assay method of COREX melting gasification furnaces Tuyere Raceway length |
| CN113362904A (en) * | 2021-05-31 | 2021-09-07 | 马鞍山钢铁股份有限公司 | Method for detecting shape of blast furnace tuyere raceway |
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| CN100532578C (en) | 2009-08-26 |
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