CN104614275A - Method for measuring ferrous content in artificial lump ore - Google Patents
Method for measuring ferrous content in artificial lump ore Download PDFInfo
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- CN104614275A CN104614275A CN201510045708.3A CN201510045708A CN104614275A CN 104614275 A CN104614275 A CN 104614275A CN 201510045708 A CN201510045708 A CN 201510045708A CN 104614275 A CN104614275 A CN 104614275A
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Abstract
The invention relates to a method for measuring ferrous content in artificial lump ore. Since a main component for deciding mineral magnetism in the artificial ore is ferrous oxide, the content of the ferrous oxide in the mineral and the magnetic field force accepted by the mineral in a magnetic field are in linearly dependent relation, the weight increment phenomenon occurs on the mineral due to magnetic field effect by adding the magnetic field at the lower part of a belt weigher, so that the magnetic field force accepted by the mineral in the magnetic field is obtained; and then the ferrous oxide content in a to-be-measured mineral sample can be obtained through the specific value change of the magnetic field forces of the standard sample and the to-be-measured mineral sample. The method disclosed by the invention is simple in process flow, low in production cost, small in environment pollution, online, simple and fast.
Description
Technical field
The present invention relates to a kind of method that ore agglomerates measures ferrous content.
Background technology
Along with the development of China's economy, the consumption of iron ore deposit is increasing, and as the primary raw material of ironmaking, the quality of its quality directly affects the seed output and quality of steel.Sintering deposit and pellet are the primary raw materials of ironmaking, and the quality of its quality is very large to blast furnace process performance impact.And ferrous oxide content is the very important quality index of people's dressing.Appropriate oxygenation ferrous content not only can reduce the low-temperature reduction disintegration of sintering deposit, and can improve the reductibility of sintering deposit, and the metallurgical performance of sintering deposit is improved.
Along with the development of China's economy, the consumption of iron ore deposit is increasing, and as the primary raw material of ironmaking, the quality of its quality directly affects the seed output and quality of steel.Sintering deposit and pellet are the primary raw materials of ironmaking, and the quality of its quality is very large to blast furnace process performance impact.And ferrous oxide content is the very important quality index of people's dressing.Appropriate oxygenation ferrous content not only can reduce the low-temperature reduction disintegration of sintering deposit, and can improve the reductibility of sintering deposit, and the metallurgical performance of sintering deposit is improved.
At present, to measure or to judge that the main method of ferrous oxide content has following several: (1) sintering machine tail direct observational method, namely " see fire "; (2) chemical analysis (dichromic acid method); Measure sintered discharge gas detection method; (3) sintering deposit ferrous oxide content image intelligent detection method; (4) method using radial basis function neural network (RBFUN) method and fuzzy C-means clustering to combine forecasts sintering oxidation ferrous content in good time.
Manually see that fire is subject to the impact of human factor, cause testing result unstable, and deviation is large.
Though chemical analysis is accurate, length consuming time is inadequate with the timeliness of tested material.
Measure sintered discharge gas detection method, the relational complexity being subject to ferrous content and exhaust gas temperature affects, and not easily surveys standard.
Image intelligent detection method increases alleviating in hand labor intensity and measurement result accuracy, but on-the-spot rugged environment is unfavorable for the collection of system data.
The method that radial basis function neural network (RBFUN) method and fuzzy C-means clustering combine, because the procedure parameter of sintering is a lot, and also all relevant to ferrous content, so be difficult to use general Mathematical Modeling Methods to predict ferrous content.
Summary of the invention
The present invention is directed to the deficiency of ferrous oxide content measuring method in prior art, provide a kind of flow process simple, quick, pollute the method for iron protoxide in little online prosecution ore agglomerates.
Technical solution of the present invention is: owing to determining the composition mainly iron protoxide of magnetic mineral in people's dressing, thus the relation that the magnetic field force that in mineral, the content of iron protoxide and mineral are suffered in magnetic field is linearly correlated with, mineral can be made due to magnetic fields generation weightening finish phenomenon by adding magnetic field in belt conveyer scale bottom, and draw the magnetic field force that mineral are subject in magnetic field, then ferrous oxide content in sample ore to be measured can be drawn by the ratio change of the magnetic field force of standard specimen and sample ore to be measured.
The device that a kind of ore agglomerates measures ferrous content is devised: comprise belt conveyer scale according to above-mentioned measuring principle, below belt conveyer scale carrying roller, arrange electromagnet, electromagnet is that a pair material is identical, symmetrical shape, the pole pair that magnetic is different, pole pair connects AC/DC changeover switch.
A kind of ore agglomerates measures the method for ferrous content: be positioned over by electromagnet below belt conveyer scale, when electromagnet is not with magnetic field, returns to zero to the weight of the system of travelling belt own; When then regulating magnetic field intensity to be certain particular value H, magnetic force suffered by travelling belt system is F
0; Continue the magnetic force F of standard sample ore when known quality and particular value H measuring known ferrous content
2; Measure the magnetic force F of material to be measured when particular value H of instantaneous mass again
1; By the magnetic picture ratio of the magnetic force of material to be measured and known ferrous content and quality, the ferrous content of material to be measured just can be drawn.
Ore agglomerates measures a method for ferrous content, it is characterized in that carrying out according to following steps.
(1) ore agglomerates on belt conveyer scale is tested.
(2) Special electric magnet is positioned over below belted electronic balance, regulates the magnetic field intensity of electromagnet.
(3) static at belt conveyer scale, when magnetic field intensity is 0, the weight when travelling belt of survey not containing material is 0.
(4) regulate magnetic field intensity when be certain particular value H, gravity when travelling belt does not contain material is F
0.
(5) cut off the electricity supply, when magnetic field intensity is 0, on belt conveyer scale, put into known ferrous content X
0, quality is M standard sample ore.
(6), when regulating magnetic field intensity to be certain particular value H again, now quality is the gravity that the standard specimen of M is subject to is F
1.
(7) magnetic force then suffered by standard sample is: F
1-F
0, quality ferrous in standard sample is MX
0.
(8) cut off the electricity supply, take off standard sample, when magnetic field intensity is 0, belt conveyer scale zero setting, then allow belt conveyer scale work together, when material to be measured is through belt balance weighing carrying roller, record treats that the instantaneous weight of test sample is Q.
(9) when regulating magnetic field intensity to be corresponding value H, now weight be Q treat that the gravity that test sample is subject to is F
2.
(10) then treat that the magnetic force suffered by test sample is: F
2-F
0, treat that the quality of test sample is Q.
(11) then the percentage composition X of iron protoxide is in material to be measured: M X
0(F
1-F
0)/Q(F
2-F
0).
Described people's agglomeration sample is sintering deposit or pellet.
The invention has the beneficial effects as follows: this measuring method and sintering machine tail direct observational method, namely " see fire " and compare have by human factor little, the advantage that check result is stable; Compared with chemical analysis (dichromic acid method), there is the fast advantage of detection speed; Have compared with measurement sintered discharge gas detection method and detect advantage accurately; Have compared with sintering deposit ferrous oxide content image intelligent detection method and affect little advantage by site environment; To compare with the method that fuzzy C-means clustering combines with utilization radial basis function neural network (RBFUN) method and there is the easy advantage of data processing.It is simple that this method has technological process, and production cost is low, and environmental pollution is little, online, simple, fast feature.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the inventive method.
Embodiment
Be described below in detail embodiments of the invention, it should be noted that embodiment described below is exemplary, only for explaining the present invention, and can not limitation of the present invention be interpreted as.
Ore agglomerates measures a method for ferrous content, belt conveyer scale is positioned over transport ore agglomerates travelling belt below, carry out according to following steps.
(1) ore agglomerates on belt conveyer scale is tested.
(2) Special electric magnet is positioned over below belted electronic balance, the magnetic field intensity of regulating magnet.
(3) static at belt conveyer scale, when magnetic field intensity is 0, the weight when travelling belt of survey not containing material is 0.
(4) regulate magnetic field intensity when be certain particular value H, power when travelling belt does not contain material is F
0.
(5) cut off the electricity supply, when magnetic field intensity is 0, on belt conveyer scale, put into known ferrous content X
0, quality is the standard sample ore of M.
(6), when regulating magnetic field intensity to be certain particular value H again, now quality is the gravity that the standard specimen of M is subject to is F
1.
(7) magnetic force then suffered by standard sample is: F
1-F
0, quality ferrous in standard sample is MX
0.
(8) cut off the electricity supply, take off standard sample, when magnetic field intensity is 0, belt conveyer scale zero setting, then allow belt conveyer scale work together, when material to be measured is through belt balance weighing carrying roller, record treats that the instantaneous weight of test sample is Q.
(9) when regulating magnetic field intensity to be corresponding value H, now weight be Q treat that the gravity that test sample is subject to is F
2.
(10) then treat that the magnetic force suffered by test sample is: F
2-F
0.
(11) then the percentage composition X of iron protoxide is in material to be measured: M X
0(F
1-F
0)/Q(F
2-F
0).
Described ore agglomerates is sintering deposit or pellet.
Embodiment one:, get the standard sample M=1000N that ferrous oxide content in sintering ore is 10wt%, be under the magnetic field of 0.10T in magnetic field intensity, measure sintering sample ore to be measured
ferrous oxide content method be.
(1) under belt stationary state, on belt conveyer scale, field intensity is 0, and not adding sample ore time institute on measured weight is 0.
(2) survey when field intensity is 0.10T, F
0=220N.
(3) standard specimen is sampled M=1000N, be placed on belt conveyer scale, field intensity is adjusted to 0.10T, and writing down corresponding gravity is F
1=1700N, the magnetic field force that standard specimen is corresponding is F
1-F
0=1480N.
(4) cut off the electricity supply, when magnetic field intensity is 0, belt conveyer scale zero setting, puts material to be measured, and the weight recorded is Q=1000N.
(5) field strength is adjusted to 0.10T, then under making belt in running order, writes down sintering sample ore to be measured
gravity be F
2=1500N, sintering sample ore to be measured
corresponding magnetic field force is F
2-F
0=1280N.
(6) sintering sample ore to be measured
ferrous oxide content be X, by QX/MX
0=(F
2-F
0)/(F
1-F
0)=0.86, can obtain the value of X, is sample ore to be measured
the content of iron protoxide.
The sintering sample ore that embodiment one obtains
under field intensity is 0.10T, the sample ore weight that belt conveyer scale is surveyed is 1000N, and suffered magnetic field force is 1280N, sintering sample ore
ferrous oxide content be 8.6%wt.
Embodiment two: get the standard specimen sampling M=1000N that ferrous oxide content in sintering ore is 10wt%, be under the magnetic field of 0.25T in magnetic field intensity, measure sintering sample ore to be measured
ferrous oxide content method be.
(1) on belt conveyer scale, field intensity is 0, and institute's on measured weight when not adding sample ore is 0.
(2) survey when field intensity is 0.25T, F
0=240N.
(3) standard specimen is sampled M=1000N, be placed on belt conveyer scale, field intensity is adjusted to 0.25T, and writing down corresponding gravity is F
1=1940N, the magnetic field force that standard specimen is corresponding is F
1-F
0=1700N.
(4) cut off the electricity supply, when magnetic field intensity is 0, belt conveyer scale zero setting, puts material to be measured, and the weight recorded is Q=1115N.
(5) field strength is adjusted to 0.25T, writes down and treat that the gravity of test sample is F
2=1820, the magnetic field force that sample ore to be measured is corresponding is F
2-F
0=1580N.
(6) set and treat that the ferrous oxide content of test sample is as X, by QX/MX
0=(F
2-F
0)/(F
1-F
0)=0.83, can obtain the value of X, is sintering sample ore
the content of iron protoxide.
The sintering sample ore that embodiment two obtains
under field intensity is 0.25T, the sample ore weight suffered by belt conveyer scale is 1115N, and suffered magnetic field force is 1580N, sintering sample ore
ferrous oxide content be 8.3%wt.
Embodiment three: get the standard specimen sampling M=1000N that ferrous oxide content in sintering ore is 10wt%, be under the magnetic field of 0.40T in magnetic field intensity, measure sintering sample ore to be measured
ferrous oxide content method be.
(1) on belt conveyer scale, field intensity is 0, and institute's on measured weight when not adding sample ore is 0.
(2) survey when field intensity is 0.40T, F
0=265N.
(3) standard specimen is sampled M=1000N, be placed on belt conveyer scale, field intensity is adjusted to 0.40T, and writing down corresponding gravity is F
1=2035N, the magnetic field force that standard specimen is corresponding is F
1-F
0=1770N.
(4) cut off the electricity supply, when magnetic field intensity is 0, belt conveyer scale zero setting, the material to be measured put, the weight recorded is Q=1250N.
(5) field strength is adjusted to 0.40T, writes down and treat that the gravity of test sample is F
2=2135N, the magnetic field force that sample ore to be measured is corresponding is F
2-F
0=1870N.
(6) set and treat that the ferrous oxide content of test sample is as X, by QX/MX
0=(F
2--F
0)/(F
1-F
0)=0.84, can obtain the value of X, is sintering sample ore to be measured
the content of iron protoxide.
The sintering sample ore that embodiment three obtains
under field intensity is 0.40T, the sample ore weight that belt conveyer scale is surveyed is 1250N, and suffered magnetic field force is 1870N, sintering sample ore to be measured
ferrous oxide content be 8.4%wt.
Embodiment four: get the standard specimen sampling M=1000N that ferrous oxide content in sintering ore is 10wt%, be under the magnetic field of 0.50T in magnetic field intensity, measure sintering sample ore to be measured
ferrous oxide content method be.
(1) on belt conveyer scale, field intensity is 0, and institute's on measured weight when not adding sample ore is 0.
(2) survey when field intensity is 0.40T, F
0=285N.
(3) standard specimen is sampled M=1000N, be placed on belt conveyer scale, field intensity is adjusted to 0.50T, and writing down corresponding gravity is F
1=2150N, the magnetic field force that standard specimen is corresponding is F
1-F
0=1965N.
(4) cut off the electricity supply, when magnetic field intensity is 0, belt conveyer scale zero setting, the material to be measured put, the weight recorded is Q=1280N.
(5) field strength is adjusted to 0.40T, writes down and treat that the gravity of test sample is F
1=2300N, the magnetic field force that sample ore to be measured is corresponding is F
1-F
0=2015N.
(6) set and treat that the ferrous oxide content of test sample is as X, by QX/MX
0=(F
2-F
0)/(F
1-F
0)=0.86, can obtain the value of X, is sintering sample ore to be measured
the content of iron protoxide.
The sintering sample ore that embodiment four obtains
under field intensity is 0.40T, the sample ore weight that belt conveyer scale is surveyed is 1280N, and suffered magnetic field force is 2015N, sintering sample ore to be measured
ferrous oxide content be 8.6%wt.
This embodiment has following good effect.
1, the inventive method and sintering machine tail direct observational method, method of namely " seeing fire "; Chemical analysis (dichromic acid method); Measure sintered discharge gas detection method; Sintering deposit ferrous oxide content image intelligent detection method; Use radial basis function neural network (RBFUN) method to forecast that the methods such as sintering oxidation ferrous content are compared with the method that fuzzy C-means clustering combines in good time, have and measure accurately, simple to operation, the advantage such as direct online.
2, the inventive method is embodied in different magnetic field intensity conditions and gets off to detect the ore agglomerates of different ferrous oxide content, can obtain the ferrous oxide content of corresponding mineral accurately and conveniently.
4, the inventive method can help the online content adjusting iron protoxide in ore agglomerates timely, ensures the metallurgical performance that mineral are good.
5, the inventive method has technological process simply, convenient to operation, and measurement result is accurate, and online prosecution is strong, and production cost is low, the feature that environmental pollution is little.
Claims (2)
1. ore agglomerates measures a method for ferrous content, it is characterized in that carrying out according to following steps:
(1) ore agglomerates on belt conveyer scale is tested;
(2) Special electric magnet is positioned over below belted electronic balance, the magnetic field intensity of regulating magnet;
(3) static at belt conveyer scale, when magnetic field intensity is 0, the weight when travelling belt of survey not containing material is 0;
(4) regulate magnetic field intensity when be certain particular value H, power when travelling belt does not contain material is F
0;
(5) cut off the electricity supply, when magnetic field intensity is 0, on belt conveyer scale, put into known ferrous content X
0, quality is the standard sample ore of M;
(6), when regulating magnetic field intensity to be certain particular value H again, now quality is the gravity that the standard specimen of M is subject to is F
1;
(7) magnetic force then suffered by standard sample is: F
1-F
0, quality ferrous in standard sample is MX
0;
(8) cut off the electricity supply, take off standard sample, when magnetic field intensity is 0, belt conveyer scale zero setting, then allow belt conveyer scale work together, when material to be measured is through belt balance weighing carrying roller, record treats that the instantaneous weight of test sample is Q;
(9) when regulating magnetic field intensity to be corresponding value H, now weight be Q treat that the gravity that test sample is subject to is F
2;
(10) then treat that the magnetic force suffered by test sample is: F
2-F
0;
(11) then the percentage composition X of iron protoxide is in material to be measured: M X
0(F
1-F
0)/Q(F
2-F
0).
2. a kind of ore agglomerates as claimed in claim 1 measures the method for ferrous content, it is characterized in that the ore agglomerates above belt conveyer scale is sintering deposit or pellet.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885750A (en) * | 2017-02-24 | 2017-06-23 | 武汉科技大学 | A kind of sintering deposit ferrous oxide content detecting system and its method |
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Application publication date: 20150513 |