CN105021488B - The test method of the mixing degree of iron ore pellets mixture - Google Patents
The test method of the mixing degree of iron ore pellets mixture Download PDFInfo
- Publication number
- CN105021488B CN105021488B CN201510493078.6A CN201510493078A CN105021488B CN 105021488 B CN105021488 B CN 105021488B CN 201510493078 A CN201510493078 A CN 201510493078A CN 105021488 B CN105021488 B CN 105021488B
- Authority
- CN
- China
- Prior art keywords
- container
- sample
- quality
- funnel
- sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
A kind of test method of the mixing degree of iron ore pellets mixture, this method include：1) separately sampled in N number of section after the material outlet of iron ore pellets mixing apparatus in a sampling range or sampled with time interval, samples taken number is 1,2,3,4 ... N；2) it is m that each sample imported into a quality via a funnel respectivelyrWeighing container in；3) the extra material in vessel port top in step 2) is struck off with scraper, container contents is made to be flushed with vessel port, the quality for then measuring container+sample is mi, the N of wherein i=1,2,3 ...；4) it averages for the quality of surveyed N number of sample；5) for surveyed N number of sample quality miAnd average value, seek quality standard difference S；6) for averaging of income valueWith obtained standard deviation S, by formula
Description
Technical field
The present invention relates to a kind of test methods of mixing degree of iron ore pellets mixture more particularly to agglomeration for iron mine pelletizing to lead
The raw material in domain mixes, and belongs to field of steel metallurgy.
Background technology
In iron and steel metallurgical industry, pelletizing method and sintering process are that two big method of raw mineral materials agglomeration and blast furnace burden are artificial
Two kinds of very important agglomeration process of lump ore.The appearance of pelletizing method is later, but opposite sintering process, is fitted in environmentally friendly, energy saving, raw material
Ying Xing, raising furnace processor, reduction production cost etc. have advantage, and therefore, pelletizing method agglomeration process just gradually causes industry
The attention on boundary, development speed are increasingly accelerated.Since 21 century, major iron and steel enterprise starts to build pellet production line one after another, domestic
Pelletizing technology enters the fast-developing phase, and production level is continuously improved, and pellet has become universally recognized ideal blast furnace in industry
A part in burden structure.
Raw material is mainly iron ore concentrate and bentonite in pelletizing process, because iron ore itself is without stickiness, without preferable balling-up
Can, so a certain amount of bentonite with caking property need to be added in iron ore concentrate, it is allowed to promote iron ore concentrate by balling equipment
Powder is very fast, preferable balling-up.Therefore the quality (granularity, uniformity, intensity) of pellet quality is heavily dependent on iron essence
Mine and bentonitic degree of mixedness can effectively detect the mixed mixing degree of pellet feed, it is ensured that the mixed effect of raw material,
There is important meaning to the production of pelletizing process.
Mixed effect, the uniformity coefficient of raw material are weighed with mixing degree.Although pelletizing ore production technology obtains in China
To fast development, but the detection of pellet feed mixture homogeneity does not have effective solution method, so that mixed effect can not be accurate
Evaluation, the final product quality of pelletizing are restricted.
Mixing degree by naked eyes accurate evaluation pellet feed is very difficult, and reason is to form the iron essence of pellet feed
Mine and bentonite are all superfine granular materials, and granularity is both less than -200 (being less than 0.074mm) mesh and accounts for 80% or more, maximum grain
Degree is no more than 0.2mm.Iron ore concentrate is complex in composition, and many is from different mines, and respective composition is different, and physical property is different.It is swollen
The proportioning only 1%~3% of profit soil in the feed, accounting is extremely low.Therefore, although iron ore concentrate is variant in color with bentonite,
But after mixing, single component solid colour of the integral color of mixture substantially with iron essence, is visually that can not differentiate each ingredient
Distribution.
At present in terms of material mixing, there are many methods of test mixed effect, such as scanning electron microscope method, distribution fractal
Method, pixel grillage analytical method, constituent content mensure method etc..These are mostly in medicine, food and feedstuff industry application, and major part is all
By certain limitation, there is extremely apparent defect, almost cannot achieve in the test of metallurgical briquetting raw material mixing degree.
Scanning electron microscope method is to make electronic image analysis to sample, though observation sample is intuitively, conveniently, the sampling of this method is very
Less, representative poor, the uniformity of powder can not quantitatively be described, and scanning electron microscope is expensive, testing cost mistake
It is high；Distribution fractal method analyzes the uniformity using size distribution fractal, but size distribution fractal value individually can
There is negative, illustrates that computational methods have certain limitation in calculating point dimension；Pixel grillage analytical method is to utilize computer gray scale
The mixed powder for differing larger is divided into pixel compartments to be compared, this method is intuitive, simple, easily operated and can be to avoid sampling
When the problem of bringing, but the range for covering of taking pictures is too small, representative difference, and can only differ larger mixed powder to gray scale and be compared
Good analysis；Constituent content mensure hair is to carry out quantitative detection to a certain element in material, and surveyed element must contain in material
Amount is stablized and is easy to detect, and by multiple sampling and measuring, relatively show that material mixed effect, secondary method element contain with standard content
Measure fixed more complicated, and mixed material iron ore concentrate because of metallurgical briquetting field and bentonite each element changes of contents are big, it is difficult to
The stable element for being easy to detect is found, therefore the method can not be applicable in.
Invention content
The object of the present invention is to provide a kind of test methods of the mixing degree of iron ore pellets mixture.The present invention is substantially
A kind of mixed effect detection method is more specifically a kind of measuring method of the water content of iron ore pellets material.Metallurgical briquetting is led
Contain a certain amount of bentonite in the mixture of domain, when pelletizing quality reaches requirement, bentonite consumption can be maintained at relatively stable
Amount under, although bentonite composition is more complicated, contain montmorillonite, illite, kaolinite, galapectite, chlorite, zeolite, stone
English, feldspar, calcite etc., but its main ingredient is montmorillonite, content is up to 85%~90%, so the certain properties of bentonite
All it is to be determined by montmorillonite.Montmorillonite has very strong dilatancy, and bentonite volume expansion is made to can reach several times to 30 times, and
And fine iron breeze and bentonitic density variation are big in pelletizing mixture, bentonite proportion is 0.9g/cm3, and fine iron breeze ratio
Weight can reach 1.8~2.2g/cm3.If the pelletizing mixed material is effectively and uniformly mixed, mixed material will
It is considered as proportion everywhere to be all consistent, and if bentonite mixing is uneven, bentonite distribution has very greatly in material after mixing
Difference, then everywhere in material proportion just also can difference, the more local proportion of bentonite accumulation can be small.Utilize this important object
Property, the quality sampling of mixed material can be measured, mixing degree calculating is carried out according to institute's measured data, obtain mixed effect.
An embodiment according to the present invention, provides the test method of the mixing degree of iron ore pellets mixture, this method
Include the following steps：
1) it samples：1.1) it is sampled with distance interval：In iron ore pellets mixing apparatus (as primary mixer or primary mixing
Machine) material outlet after on feed belt using the outlet as starting point and to have at 3-15 meters of distances work apart from the outlet
For terminal come determine a sampling section (i.e. the length in the section is 3-15 meters, such as 3-12 meters, such as 3-10 meters or 3-6 meters,
Such as 4 meters), and by the sampling range be divided into N number of section so as to from these sections simultaneously or almost simultaneously or synchronized sampling, institute
It is 1-N (i.e. 1,2,3,4 ... N) to take sample number into spectrum；Or, 1.2) sampled with time interval：In the material of iron ore pellets mixing apparatus
Exit is sampled, institute with predetermined time interval (such as 3-20 seconds, preferably 4-15 seconds, more preferable 5-10 seconds of time interval)
It is 1-N (i.e. 1,2,3,4 ... N) to take sample number into spectrum；
2) it is m No. 1 sample to be imported into a quality via a funnelrWeighing container (hereinafter referred container)
In, until funnel under the container in piled with surveyed material samples (such as so that stocking angle reaches it and stops after solid accumulation
Angle)；
3) the extra material in vessel port top in step 2) is struck off with scraper, so that container contents is flushed with vessel port, so
After be positioned in weighing apparatus (such as balance or electronic scale) and measure its quality, the quality for measuring container+sample is m1 (or mi,
Middle i=1)；
4) sample for the remaining 2nd to No. N, respectively repeatedly above step 2) and 3), the matter of institute's xylometer+sample
Amount is denoted as mi, i=2-N (i.e. 2,3 ... N)；
5) quality that N number of sample is surveyed to step 4) averages that (average value is denoted as)：
6) N number of sample quality m will be surveyed in step 4)1With average value in step 5)Seek quality standard difference S：
7) step 5) averaging of income value is usedWith the standard deviation S obtained in step 6), matter needed for this test is acquired by following formula
The coefficient of variation CV values (%) [general, this value at least retains two-decimal] of amount：
In general, via the concentrate powder storage bin of all kinds of mineral, bentonite feed bin and respective dispensing electronic belt
Various Iron Ore Powders, bentonite are added in the sports belt of rubber conveyer by scale successively, then that the material on belt is defeated
It is sent in primary mixer and carries out mixed once, (both terms are claimed for acquisition mixed material or iron ore pellets mixture
Make pellet raw material).
" iron ore pellets mixture " described here refers to obtained material after being mixed in primary mixer.The iron ore
Pelletizing mixture, which is transported in pelletizer (i.e. second drum mixer), carries out pelletizing.Generally, sintering is completed in second drum mixer
With the granulation of material or the process (water vapour or atomized water can be increased, to improve granulation or pelletizing effect) of pelletizing processed.That is,
The iron ore pellet or pelletizing of sintering are obtained in second drum mixer.
The numerical value of N is usually 5 or more, and more preferably 6,7,8,9,10,11,12,13,14,15,16,17,18,19,20.
For example, when N is 6, the number of the number or samples taken that sample section is followed successively by 1,2,3,4,5,6.The rest may be inferred.
Iron ore pellets mixing apparatus used in step 1) is vertical strengthened mixing machine or horizontal intensive mixer.It is vertical
The structure of formula intensive mixer is：Material is fed from upper side, in tempering tank after agitated paddle stirring mixing, in tempering tank
Bottom discharge openings are discharged, the adjustable operating parameter of the equipment agitating paddle, tempering tank and discharge port.Horizontal intensive mixer
Structure is：Equipment is laterally put, and material enters from tempering tank one end top, is discharged in other end lower openings, flat mixer
Equipment operating parameter is unadjustable.
The mixing material being discharged from the material outlet of iron ore pellets mixing apparatus is delivered to pelletizer via feed belt.
It is general using open container for the container of weighing.For example, the mouth of container has phase with the bottom in container
Same or almost the same cross-sectional shape and cross sectional dimensions.
It is preferably in this application, when CV is less than 4, the mixing degree of pelletizing material is allowed or preferably.It is more excellent
Choosing, CV values are less than 3 (such as less than 2.5), even more preferably below 2, such as 1.5.
When the CV values acquired are higher, such as when higher than 4 or higher than 4.5, following measures should be taken：For vertical strengthened
The operating parameter of mixing machine, adjustable mixing apparatus is allowed to CV values such as rotating speed of agitator, tempering tank rotating speed or discharge rate
Reduce ideal state.For horizontal intensive mixer, when monitoring CV is higher, to meet the pellet quality of production, can suitably increase
Bentonite ore ratio.
Preferably, for N number of sampling section in the sampling range of step 1), the length of these sections is identical or substantially
It is identical, it can not also be identical.For example, when the length for sampling section is identical, the length of each section is 0.5-1.5 meters,
Such as 0.5 meter or 1 meter or 1.5 meters.
In addition, the sample obtained in step 1) is packaged in hermetic bag.In general, according to the body of the weighing container
The weight (weight sampled) of product, each sample is no less than 1.5 times of the weight of material that container can fill, is preferably no less than 2
Times.
Preferably, weighing volume of a container is 10~100ml, preferably 12~60ml, more preferable 15~50ml.Every time
When sample is imported via funnel in container, it is ensured that height of the outlet of funnel for vessel port is fixed value.It is more excellent
Choosing, is placed on the container of holder fixed funnel, weighing under funnel.It is preferred that the outlet of funnel is relative to vessel port
For height remain fixed at 7~30mm, more preferable 8~20mm, more preferable 10~15mm.
More specifically, the above method is as follows：
(1), electronic scale one, one, funnel, one, 15~50ml containers, scraper one, fixing bracket one, sealing are taken
Bag is several；Holder fixed funnel, funnel need to have certain altitude from experiment porch, generally take 8~20mm, container is placed under funnel,
Electronic scale measures container mass mr；
(2), the areal sampling in the mixed material of pellet feed to be measured, to ensure effective, reliable, the sampling area of sample
Should in mixing apparatus material outlet 10m or 15m section, and be packaged in step (1) in hermetic bag, sample number is at least no less than
5, sample number is denoted as N, and according to step (1) vessel volume, each example weight is no less than 2 times of the filled material of container；
(3), from samples taken in step (2), from being imported in funnel in step (1), until container piles with institute under funnel
Material is surveyed, stocking angle need to reach its angle of repose after solid accumulation；
(4), the extra material of upper vessel portion in step (3) is struck off with scraper in step (1), material is made to be flushed with container,
Again as measuring its quality in electronic scale in (1)；
(5), step (3), (4) are repeated, all N number of sample tests are completed, institute's test sample quality is denoted as mi, i=1,2,
3…N；
(6), it surveys N number of sample to step (5) to average containing quality, average value is denoted as
(7), N number of sample quality m will be surveyed in step (6)iWith average value in step (4)Ask quality standard poor, standard
Difference is denoted as S：
(8), with step (6) averaging of income valueStandard deviation S is obtained in step (7), acquires quality needed for this test
Coefficient of variation CV values (%), this value at least retain two-decimal, and CV formula are：
The coefficient of variation CV values of quality, the mixing degree of as surveyed pelletizing mixed material, this numerical value obtained by this test method
Indicate the difference of proportion in mixed material sample, the variation of this numerical value bigger expressions sample difference of specific gravity greatly, can wait and be considered as material and mix
It is poorer to close effect, otherwise mixed effect is better.Therefore the mixing number of degrees value of this method can embody mixing apparatus mixing energy very well
The mixed effect of power, that is, material can be used as the judgment criteria of commercial Application.
Advantages of the present invention：
This method principle is simple, reliable.
Test method is easy to operate, easy to use, and use cost is low.
This method test speed is fast, quickly can provide production foundation for enterprise, enable the enterprise to according to test result, rapidly
Production equipment, technique are adjusted, ensure the quality of production.
Specific implementation mode
A kind of test method of the mixing degree of iron ore pellets mixture, this approach includes the following steps：
1) it samples：1.1) it is sampled with distance interval：In iron ore pellets mixing apparatus (as primary mixer or primary mixing
Machine) material outlet after on feed belt using the outlet as starting point and to have at 3-15 meters of distances work apart from the outlet
For terminal come determine a sampling section (i.e. the length in the section is 3-15 meters, such as 3-12 meters, such as 3-10 meters or 3-6 meters,
Such as 4 meters), and the sampling range is divided into N number of section (preferably, these sections length having the same) so as to from these sections
In simultaneously or almost simultaneously or synchronized sampling, samples taken number is 1-N (i.e. 1,2,3,4 ... N)；Or, 1.2) with time interval
Sampling：At the material outlet of iron ore pellets mixing apparatus, with predetermined time interval (such as 3-20 seconds, preferably 4-15 seconds, more
It is preferred that 5-10 seconds time intervals) sampling, samples taken number is 1-N (i.e. 1,2,3,4 ... N)；
2) it is m No. 1 sample to be imported into a quality via a funnelrWeighing container (hereinafter referred container)
In, until funnel under the container in piled with surveyed material samples (such as so that stocking angle reaches it and stops after solid accumulation
Angle)；
3) the extra material in vessel port top in step 2) is struck off with scraper, so that container contents is flushed with vessel port, so
After be positioned in weighing apparatus (such as balance or electronic scale) and measure its quality, the quality for measuring container+sample is m1 (or mi,
Middle i=1)；
4) sample for the remaining 2nd to No. N, respectively repeatedly above step 2) and 3), the matter of institute's xylometer+sample
Amount is denoted as mi, i=2-N (i.e. 2,3 ... N)；
5) quality that N number of sample is surveyed to step 4) averages that (average value is denoted as
6) N number of sample quality m will be surveyed in step 4)1With average value in step 5)Seek quality standard difference S：
7) step 5) averaging of income value is usedWith the standard deviation S obtained in step 6), matter needed for this test is acquired by following formula
The coefficient of variation CV values (%) [general, this value at least retains two-decimal] of amount：
The numerical value of N is usually 5 or more, and more preferably 6,7,8,9,10,11,12,13,14,15,16,17,18,19,20.
For example, when N is 6, the number of the number or samples taken that sample section is followed successively by 1,2,3,4,5,6.The rest may be inferred.
Iron ore pellets mixing apparatus used in step 1) is vertical strengthened mixing machine.The structure of vertical strengthened mixing machine
It is：Material is fed from upper side, in tempering tank after agitated paddle stirring mixing, is discharged in tempering tank bottom discharge openings, institute
State the adjustable operating parameter of equipment agitating paddle, tempering tank and discharge port.
The mixing material being discharged from the material outlet of iron ore pellets mixing apparatus is delivered to via feed belt as secondary
In the pelletizer of mixing machine.
The container of weighing is using open container, the bottom cross section having the same wherein in the mouth and container of container
Shape and cross sectional dimensions.
When CV is less than 4, the mixing degree of pelletizing material is allowed or preferably.
When the CV values acquired are higher, such as when higher than 4 or higher than 4.5, the operating parameter of mixing apparatus is adjusted, such as stirs
Paddle rotating speed, tempering tank rotating speed or discharge rate are mixed, CV values is allowed to and is reduced to ideal state.
Preferably, for N number of sampling section in the sampling range of step 1), the length of these sections is identical or substantially
It is identical, it can not also be identical.For example, when the length for sampling section is identical, the length of each section is 0.5-1.5 meters,
Such as 0.5 meter or 1 meter or 1.5 meters.
In addition, the sample obtained in step 1) is packaged in hermetic bag.In general, according to the body of the weighing container
The weight (weight sampled) of product, each sample is no less than 1.5 times of the weight of material that container can fill, is preferably no less than 2
Times.
Preferably, weighing volume of a container is 10~100ml, preferably 12~60ml, more preferable 15~50ml.Every time
When sample is imported via funnel in container, it is ensured that height of the outlet of funnel for vessel port is fixed value.It is more excellent
Choosing, is placed on the container of holder fixed funnel, weighing under funnel.It is preferred that the outlet of funnel is relative to vessel port
For height remain fixed at 7~30mm, more preferable 8~20mm, more preferable 10~15mm.
Embodiment 1
Test method is as follows：
(1), electronic scale one, one, funnel, one, 30ml containers, scraper one, fixing bracket one, hermetic bag number are taken
It is a；Holder fixed funnel, funnel need to have certain altitude from experiment porch, generally take 12mm, container, electronic scale are placed under funnel
Measure container mass mr；
(2), the areal sampling in the mixed material of pellet feed to be measured, to ensure effective, reliable, the sampling area of sample
Should in the material outlet 10m of the vertical strengthened mixing machine (i.e. iron ore pellets mixing apparatus) as primary mixer section and
The section is divided into the sampling section of 7 equal lengths, while or synchronization sampled from each section, then by institute in each section
The sample of acquirement is packaged in respectively in step (1) in hermetic bag, and sample number is 7, and sample number is denoted as N=7, according to step
(1) vessel volume, each example weight are no less than 2 times of the filled material of container；
(3), from samples taken in step (2), from being imported in funnel in step (1), until container piles with institute under funnel
Material is surveyed, stocking angle need to reach its angle of repose after solid accumulation；
(4), the extra material of upper vessel portion in step (3) is struck off with scraper in step (1), keeps material neat with vessel port
It is flat, then as measuring its quality in electronic scale in (1)；
(5), step (3), (4) are repeated, all 7 sample tests are completed, institute's test sample quality is denoted as mi, i=1,2,
3、4、5、6、7；
(6), it surveys 7 samples to step (5) to average containing quality, average value is denoted as
(7), 7 sample quality m will be surveyed in step (6)1With average value in step (4)Ask quality standard poor, standard
Difference is denoted as S：
(8), with step (6) averaging of income valueStandard deviation S is obtained in step (7), acquires quality needed for this test
Coefficient of variation CV values (%) are：
Embodiment 2
Test method is as follows：
(1), electronic scale one, one, funnel, one, 40ml containers, scraper one, fixing bracket one, hermetic bag number are taken
It is a；Holder fixed funnel, funnel need to have certain altitude from experiment porch, take 20mm, and container is placed under funnel, and electronic scale measures
Container mass mr；
(2), the areal sampling in the mixed material of pellet feed to be measured, to ensure effective, reliable, the sampling area of sample
Should in the material outlet 10m of the vertical strengthened mixing machine (i.e. iron ore pellets mixing apparatus) as primary mixer section and
The section is divided into the sampling section of 10 equal lengths, while or synchronization sampled from each section, then will be in each section
Acquired sample is packaged in respectively in step (1) in hermetic bag, and sample number 10, sample number is denoted as N=10, according to step
(1) vessel volume, each example weight are no less than 2 times of the filled material of container；
(3), from samples taken in step (2), from being imported in funnel in step (1), until container piles with institute under funnel
Material is surveyed, stocking angle need to reach its angle of repose after solid accumulation；
(4), the extra material of upper vessel portion in step (3) is struck off with scraper in step (1), keeps material neat with vessel port
It is flat, then as measuring its quality in electronic scale in (1)；
(5), step (3), (4) are repeated, all 10 sample tests are completed, institute's test sample quality is denoted as mi, i=1,2,
3、4、5、6、7、8、9、10；
(6), it surveys 10 samples to step (5) to average containing quality, average value is denoted as
(7), N number of sample quality m will be surveyed in step (6)iWith average value in step (4)Ask quality standard poor, standard
Difference is denoted as S：
(8), with step (6) averaging of income valueStandard deviation S is obtained in step (7), acquires quality needed for this test
Coefficient of variation CV values (%) are：
Embodiment 3
It is sampled according to time interval.Test method is as follows：
(1), electronic scale one, one, funnel, one, 40ml containers, scraper one, fixing bracket one, hermetic bag number are taken
It is a；Holder fixed funnel, funnel need to have certain altitude from experiment porch, take 20mm, and container is placed under funnel, and electronic scale measures
Container mass mr；
(2), in the material outlet of the vertical strengthened mixing machine (i.e. iron ore pellets mixing apparatus) as primary mixer with 5
The time interval of second, takes 10 samples, is packaged in respectively in step (1) in hermetic bag, sample number 10, sample number is denoted as N
=10, according to step (1) vessel volume, each example weight is no less than 2 times of the filled material of container；
(3), from samples taken in step (2), from being imported in funnel in step (1), until container piles with institute under funnel
Material is surveyed, stocking angle need to reach its angle of repose after solid accumulation；
(4), the extra material of upper vessel portion in step (3) is struck off with scraper in step (1), keeps material neat with vessel port
It is flat, then as measuring its quality in electronic scale in (1)；
(5), step (3), (4) are repeated, all 10 sample tests are completed, institute's test sample quality is denoted as mi, i=1,2,
3、4、5、6、7、8、9、10；
(6), it surveys 10 samples to step (5) to average containing quality, average value is denoted as
(7), N number of sample quality m will be surveyed in step (6)iWith average value in step (4)Ask quality standard poor, standard
Difference is denoted as S：
(8), with step (6) averaging of income valueStandard deviation S is obtained in step (7), acquires quality needed for this test
Coefficient of variation CV values (%) are：
The coefficient of variation CV values of quality, the mixing degree of as surveyed pelletizing mixed material, this numerical value obtained by this test method
Indicate the difference of proportion in mixed material sample, the variation of this numerical value bigger expressions sample difference of specific gravity greatly, can wait and be considered as material and mix
It is poorer to close effect, otherwise mixed effect is better.Therefore the mixing number of degrees value of this method can embody mixing apparatus mixing energy very well
The mixed effect of power, that is, material can be used as the judgment criteria of commercial Application.
Claims (17)
1. the test method of the mixing degree of iron ore pellets mixture, this approach includes the following steps：
1) it samples：1.1) it is sampled with distance interval：In the iron ore pellets mixing apparatus as primary mixer or primary mixing machine
Material outlet after on feed belt using the outlet as starting point and using apart from the outlet have at 3-15 meters of distances as end
The sampling range is divided into N number of section so as to simultaneously or synchronous from these sections by point to determine the section of a sampling
Sampling, samples taken number is 1,2,3,4 ..., and the length of N, wherein each section are 0.5-1.5 meters；Or, 1.2) with the time
Interval sampling：At the material outlet of iron ore pellets mixing apparatus, being sampled with predetermined time interval, samples taken number is 1,
2,3,4 ... N, wherein：The time interval is 3-20 seconds；
2) No. 1 sample is imported into a quality via a funnel isWeighing container in, until funnel under should
Surveyed material samples are piled in container so that stocking angle reaches its angle of repose after solid accumulation；
3) the extra material in vessel port top in step 2) is struck off with scraper, so that container contents is flushed with vessel port, then puts
It is placed in weighing apparatus and measures its quality, the quality for measuring container+sample is, wherein i=1；
4) sample for the remaining 2nd to No. N, respectively repeatedly above step 2) and 3), the quality of institute's xylometer+sample
It is denoted as, i=2-N；
5) to step 4）The quality for surveying N number of sample is averaged：
；
6) according to the quality for surveying N number of container+sample in step 4)With the average value in step 5), ask quality standard poor
S：
；
7) step 5) averaging of income value is usedStandard deviation S with being obtained in step 6), the variation of this test quality is acquired by following formula
Coefficient CV values（%）：
。
2. according to the method described in claim 1, wherein：The time interval is 4-15 seconds.
3. method according to claim 1 or 2, the length of wherein sampling range is 3-6 meters.
4. method according to claim 1 or 2, wherein the numerical value of N is 5,6,7,8,9,10,11,12,13,14,15,16,
17,18,19 or 20.
5. according to the method described in claim 3, wherein for N number of sampling section in the sampling range of step 1), these areas
The length of section is identical or differs.
6. according to the method described in claim 1,2, any one of 5, wherein the sample obtained in step 1) is packaged in
In hermetic bag.
7. according to the method described in claim 4, the sample wherein obtained in step 1) is packaged in hermetic bag.
8. according to the method described in claim 1,2,5, any one of 7, wherein：Step 1）The weight of middle sampling is no less than held
1.5 times of the weight of material that device can fill.
9. according to the method described in claim 4, wherein：Step 1）The weight of middle sampling is no less than the material weight that container can fill
1.5 times of amount.
10. according to the method described in claim 8, wherein：Step 1）The weight of middle sampling is no less than the material that container can fill
2 times of weight.
11. according to the method described in any one of claim 1,2,5,7,9-10, wherein weighing volume of a container is 10
~100ml.
12. according to the method described in claim 4, wherein weighing volume of a container is 10~100ml.
13. according to the method for claim 11, wherein weighing volume of a container is 12~60ml.
14. according to the method described in claim 1,2,5,7,9-10,12, any one of 13, wherein every time by sample via
When funnel imports in container, it is ensured that the outlet of funnel is fixed value relative to the height of vessel port.
15. according to the method described in claim 4, when wherein sample being imported via funnel in container every time, it is ensured that funnel
It is fixed value to export relative to the height of vessel port.
16. according to the method for claim 14, wherein with holder fixed funnel, the container of weighing is placed on funnel
Under, the outlet of funnel is fixed as 7~30mm relative to the height of vessel port.
17. according to the method for claim 15, wherein with holder fixed funnel, the container of weighing is placed on funnel
Under, the outlet of funnel is fixed as 7~30mm relative to the height of vessel port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493078.6A CN105021488B (en) | 2015-08-12 | 2015-08-12 | The test method of the mixing degree of iron ore pellets mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493078.6A CN105021488B (en) | 2015-08-12 | 2015-08-12 | The test method of the mixing degree of iron ore pellets mixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105021488A CN105021488A (en) | 2015-11-04 |
| CN105021488B true CN105021488B (en) | 2018-10-19 |
Family
ID=54411623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510493078.6A Active CN105021488B (en) | 2015-08-12 | 2015-08-12 | The test method of the mixing degree of iron ore pellets mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105021488B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774192B (en) * | 2016-08-29 | 2020-07-03 | 中冶长天国际工程有限责任公司 | Intelligent blending device and blending method thereof |
| CN108394055A (en) * | 2018-03-13 | 2018-08-14 | 成都时代立夫科技有限公司 | A kind of quasi real time detection device and method of resin-cast machine cast component ratio |
| CN112961976B (en) * | 2021-01-29 | 2022-06-14 | 武汉科技大学 | Preparation and blending degree evaluation method of sintering material precursor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1766617A1 (en) * | 1990-07-03 | 1992-10-07 | Сибирский физико-технический институт им.В.Д.Кузнецова при Томском государственном университете | Method for preparation of powder mixtures |
| JPH0774396B2 (en) * | 1990-07-26 | 1995-08-09 | 新日本製鐵株式会社 | Method and apparatus for controlling water addition of blended raw material |
| CN2285898Y (en) * | 1996-07-17 | 1998-07-08 | 咸阳市杨陵关中纺织仪器厂 | On-line portable yarn evenness tester |
| CN101315353B (en) * | 2008-07-11 | 2011-07-20 | 江苏中烟工业公司 | Method for detecting perfuming homogeneity of cigarette production based on marker |
| CN102636405B (en) * | 2012-04-28 | 2014-07-23 | 浙江中烟工业有限责任公司 | Device and method for detecting spreading uniformity of blending materials |
| CN103760302B (en) * | 2014-01-06 | 2016-01-20 | 山东威能环保电源科技股份有限公司 | A kind of method of testing of dry powder blend uniformity coefficient |
| CN103792326B (en) * | 2014-02-25 | 2015-08-19 | 重庆烟草工业有限责任公司 | A kind of method evaluating tea dust mixing uniformity |
| CN104165822A (en) * | 2014-08-19 | 2014-11-26 | 云南中烟工业有限责任公司 | Method for quantitatively evaluating uniformity of cigarette density distribution |
-
2015
- 2015-08-12 CN CN201510493078.6A patent/CN105021488B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105021488A (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104988306B (en) | The method of testing of the mixing degree of iron ore pellets compound | |
| CN105021488B (en) | The test method of the mixing degree of iron ore pellets mixture | |
| Cazacliu et al. | Concrete mixing kinetics by means of power measurement | |
| CN102854080B (en) | Method for measuring iron content in steel slag | |
| CN102661911A (en) | Method for rapidly detecting mixing uniformity of powdery material | |
| CN105067621A (en) | Method for judging multi-phase mixing uniformity | |
| CN103760302A (en) | Method for testing mixing uniformity of dry powder | |
| CN102753543A (en) | A 1-(1h-1,2,4-triazol-1-yl)butan-2-ol derivative for pharmaceutical use, and the use of a 1-(1h-1,2,4-triazol-1-yl)butan-2-ol derivative with substantially undefined crystal shape for preparing said 1-(1h-1,2,4-triazol-1-yl)butan-2-ol derivative | |
| CN107684847B (en) | Screw multiple groups part proportioning materials method | |
| CN205929068U (en) | Stabilized soil continuous type vibration stirring processing plantmix equipment | |
| CN208497296U (en) | Utilize the production line of steel slag compacting steam brick | |
| Clementson et al. | Particle heterogeneity of corn distillers dried grains with solubles (DDGS) | |
| CN101314114A (en) | Continuous asphalt mixture blending plant | |
| CN209576473U (en) | A kind of coating sample homogeneous agitating device | |
| CN105419956B (en) | A kind of production method and equipment of powdery composition containing MES of good fluidity | |
| CN111638155B (en) | Ore blending structure evaluation method based on granulation quasi-particle sintering behavior | |
| CN206614685U (en) | A kind of continous way premixing LINTEC CSD2500 | |
| CN107537399A (en) | With the admixture adding device for weighing function | |
| Zawislak et al. | The analysis of mixing degree of granular products with the use of microtracers | |
| CN106644639B (en) | The closed circuit fine grinding system of the selection method and type Selection Test of industrial vertical stirring mill | |
| CN102814864A (en) | Continuous mortar production machine set | |
| CN106092693B (en) | A kind of preparation method of gold loaded carbon gold analytical standard substance | |
| CN206793512U (en) | A kind of fertilizer mixes structure | |
| Li et al. | Analysis of homogeneity and rheological properties of filling slurry during the mixing process through electrical resistance tomography | |
| CN106814062A (en) | The method for determining various chemical element contents in slag simultaneously |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |