CN105466930A - Method for determining calcium ferrite content on basis of sinter microscopic images - Google Patents
Method for determining calcium ferrite content on basis of sinter microscopic images Download PDFInfo
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- CN105466930A CN105466930A CN201510887620.6A CN201510887620A CN105466930A CN 105466930 A CN105466930 A CN 105466930A CN 201510887620 A CN201510887620 A CN 201510887620A CN 105466930 A CN105466930 A CN 105466930A
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- calcium ferrite
- sintering deposit
- displaing micro
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- micro picture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
Abstract
The invention discloses a method for determining the calcium ferrite content on the basis of sinter microscopic images. The method comprises steps as follows; 1), to-be-detected sinter particles are prepared to form samples suitable for being observed by a microscopic device; 2), a group of microscopic images of each sinter sample are acquired by the same microscopic device under the condition of the same enlargement factor; 3), pixels of filler, sinter holes and calcium ferrite in each microscopic image are calculated. Total pixels a of the images, total pixels t of the filler, total pixels h of the sinter holes and total pixels f of calcium ferrite of the group of images are obtained through addition of the total pixel of each microscopic image as well as pixels of the filter, the sinter holes and calcium ferrite, and the calcium ferrite content R is calculated according to a formula represented in the specification. According to the calculation method, the formula is simple, the operation is convenient, and the result is accurate.
Description
Technical field
The invention belongs to sintering technology field, be specifically related to a kind of method based on sintering deposit micro-image determination calcium ferrite content.
Background technology
In sintering deposit, calcium ferrite content is the key factor affecting sinter quality.The theory and practice of iron ore powder sintering shows: sintered bond mutually in, be optimum based on the Binder Phase of compound calcium ferrite (calcium ferrite).The content increasing compound calcium ferrite in sintering deposit is conducive to improving the intensity of sintering deposit and improving the reductibility of sintering deposit.Therefore, grasp the calcium ferrite production characteristic of iron ore powder in sintering process, contribute to Optimization Ore Matching and improve sinter quality.
In recent years, researchist has more research for the content of calcium ferrite in sintering deposit and the rule of generative capacity thereof, such as document " Gan Qin etc., affect the research of vanadium titanium sintering deposit calcium ferrite forming factors, agglomerates of sintered pellets, in April, 2008 " and document " Zhao Yanxia, Baogang commonly uses the experimental study of iron ore powder sintering basic characteristic, University Of Science and Technology of the Inner Mongol, 2007 " etc., but these researchs do not provide the method determining calcium ferrite content in detail accurately, the calcium ferrite content just estimated in a sintering deposit displaing micro picture by visual inspection is determined a kind of mineral or is a kind ofly joined ore deposit calcium ferrite content under certain condition.Not only accuracy is poor but also uncertainty is comparatively large for this method, and different people observes estimation same sintering deposit displaing micro picture may obtain different results.Therefore, be necessary that a kind of more accurate method of design is to determine the content of calcium ferrite in sintering deposit.
Summary of the invention
The object of this invention is to provide a kind of method based on sintering deposit displaing micro picture determination calcium ferrite content, the method can the content of calcium ferrite in Accurate Determining sintering deposit.
For achieving the above object, the method based on sintering deposit displaing micro picture determination calcium ferrite content designed by the present invention comprises the following steps:
1) inlayed by inserts, cut, polish, polishing sintering deposit particle to be detected is made be suitable for microscope equipment observe sample.
2) under same enlargement factor condition, observe sintering deposit sample with same microscope equipment, each sintering deposit sample obtains the displaing micro picture under one group of this enlargement factor, to observe sintering deposit sample zones of different microstructure.
3) pixel of often opening the pixel of inserts in displaing micro picture, sintering deposit hole and calcium ferrite is calculated.According to often open total pixel of displaing micro picture and inserts, sintering deposit hole and calcium ferrite pixel addition obtain total pixel a of picture in this picture group sheet, total pixel f of total pixel t of inserts, total pixel h of sintering deposit hole and calcium ferrite, obtains the content R of calcium ferrite according to following formulae discovery.
Preferably, described microscope equipment is metaloscope or scanning electron microscope.
Preferably, the enlargement factor of described microscope equipment is 50 ~ 100 times, and often organizing displaing micro picture is 5 ~ 10.
Preferably, described displaing micro picture pixel is obtained by Photoshop software or program calculation.
The calculating of last calcium ferrite content: utilize area ratio that in sintering deposit displaing micro picture, calcium ferrite accounts for represent the content of calcium ferrite, suppose that the area that calcium ferrite accounts for is F, the picture total area is A, in picture, inserts area is T, in picture, sintering deposit hole area is H, then sintering deposit area is A-T-H, calcium ferrite content:
here area all refers to the area that in multiple sintering displaing micro pictures, appropriate section is total.
Obtain when the condition such as equipment, multiple is identical because the present invention often organizes displaing micro picture, so the resolution of often opening displaing micro picture in this picture group sheet is identical with total pixel.The area of every pictures, the area of calcium ferrite, the area of sintering deposit hole and the area of inserts can be calculated according to the resolution of picture and corresponding pixel.Be b in photo resolution, total pixel is a, and total pixel of calcium ferrite is f, and total pixel of inserts is t, when total pixel of sintering deposit hole is h, then and calcium ferrite area F=f/b
2, sintering deposit area (i.e. the area of displaing micro picture) A=a/b
2, inserts area T=t/b
2, sintering deposit hole area H=h/b
2, with cartographic represenation of area absolute content, then pass through simple mathematical computations, can be by
conversion obtains the relative content of calcium ferrite
With existing by observing compared with estimation displaing micro picture determination calcium ferrite content, the method that sintering deposit displaing micro picture provided by the invention calculates calcium ferrite content in sintering deposit is more reliable, and computing formula is simple, easy to operate, result of calculation is more accurate, thus can determine calcium ferrite content in sintering deposit rapidly and accurately.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Provided by the inventionly based on the method key step of calcium ferrite content in sintering deposit displaing micro picture determination sintering deposit be:
1) inlayed by inserts, cut, polish, polishing sintering deposit particle to be detected is made be suitable for microscope equipment observe sample.
2) under same enlargement factor condition, observe sintering deposit sample with same microscope equipment, each sintering deposit sample obtains the displaing micro picture under one group of this enlargement factor, to observe sintering deposit sample zones of different microstructure.
3) pixel of often opening the pixel of inserts in displaing micro picture, sintering deposit hole and calcium ferrite is calculated.According to often open total pixel of displaing micro picture and inserts, sintering deposit hole and calcium ferrite pixel addition obtain total pixel a of picture in this picture group sheet, total pixel f of total pixel t of inserts, total pixel h of sintering deposit hole and calcium ferrite, obtains the content R of calcium ferrite according to following formulae discovery.
Embodiment: calculating basicity is 2.0 temperature is the calcium ferrite content that 1210 DEG C of sintering tests obtain in the sintered sample of Ba Nan ore deposit.
Step 1: inlayed by inserts, cut, polish, Ba Nan ore deposit sintered sample to be detected made the inlaying samples be suitable for metallography microscope sem observation by polishing.
Step 2: with metallography microscope sem observation sample, consider the calcium ferrite can either told wherein, contain larger area again as far as possible, have selected and obtaining multiple is 100 one group totally 6 displaing micro picture.
Step 3: utilize Photoshop software to calculate the pixel of each several part in displaing micro picture, as shown in table 1.
The pixel of each several part in the sintering displaing micro picture of table 1 Ba Nan ore deposit
| Picture number | Total pixel | Calcium ferrite pixel | Inserts pixel | Hole pixel |
| 1 | 4691428 | 1049873 | 154667 | 616278 |
| 2 | 4691428 | 1079405 | 123388 | 599911 |
| 3 | 4691428 | 1019612 | 214887 | 86586 |
| 4 | 4691428 | 1046103 | 123536 | 212366 |
| 5 | 4691428 | 885588 | 1301321 | 99365 |
| 6 | 4691428 | 1132677 | 336387 | 293654 |
| Amount to | 28148568 | 6213258 | 2254186 | 1908160 |
Step 4: according to following formulae discovery determination calcium ferrite content, to obtain basicity be 2.0 temperature when being 1210 DEG C during test in Ba Nan sintering deposit, and the content of calcium ferrite is 25.90%.
According to above-mentioned result of calculation, evaluate sinter quality and corresponding Instructing manufacture, obtain good effect.
Finally it should be noted that, above-mentioned embodiment is just unrestricted to the explanation of numerical procedure of the present invention, the technical scheme formed is replaced through equivalence in technical solution of the present invention basis and all belongs to protection scope of the present invention.
Claims (5)
1., based on a method for sintering deposit displaing micro picture determination calcium ferrite content, it is characterized in that:
The method comprises the following steps:
1) inlayed by inserts, cut, polish, polishing sintering deposit particle to be detected is made be suitable for microscope equipment observe sample;
2) under same enlargement factor condition, observe sintering deposit sample with same microscope equipment, each sintering deposit sample obtains the displaing micro picture under one group of this enlargement factor, to observe sintering deposit sample zones of different microstructure;
3) pixel of often opening the pixel of inserts in displaing micro picture, sintering deposit hole and calcium ferrite is calculated.According to often open total pixel of displaing micro picture and inserts, sintering deposit hole and calcium ferrite pixel addition obtain total pixel a of picture in this picture group sheet, total pixel f of total pixel t of inserts, total pixel h of sintering deposit hole and calcium ferrite, obtains the content R of calcium ferrite according to following formulae discovery:
2. the method based on sintering deposit displaing micro picture determination calcium ferrite content according to claim 1, is characterized in that:
Described microscope equipment is metaloscope or scanning electron microscope.
3. the method based on sintering deposit displaing micro picture determination calcium ferrite content according to claim 1 and 2, is characterized in that:
The enlargement factor of described microscope equipment is 50 ~ 100 times, and often organizing displaing micro picture is 5 ~ 10.
4. the method based on sintering deposit displaing micro picture determination calcium ferrite content according to claim 1 and 2, is characterized in that:
Described displaing micro picture pixel is obtained by Photoshop software or program calculation.
5. the method based on sintering deposit displaing micro picture determination calcium ferrite content according to claim 3, is characterized in that:
Described displaing micro picture pixel is obtained by Photoshop software or program calculation.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546591A (en) * | 2016-11-07 | 2017-03-29 | 首钢总公司 | A kind of detection method of sintering deposit uniformity |
| CN109191479A (en) * | 2018-09-06 | 2019-01-11 | 冶金工业规划研究院 | The method for automatic measurement of compound calcium ferrite mine phase content in a kind of sinter |
| CN109632858A (en) * | 2019-01-07 | 2019-04-16 | 天津力神电池股份有限公司 | The rapid detection method of different element relative amounts in a kind of element map |
| CN112444517A (en) * | 2020-11-18 | 2021-03-05 | 华北理工大学 | Method for detecting reduction performance of sinter based on inversion of total amount and form of calcium ferrite of under-mirror image |
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| CN109191479A (en) * | 2018-09-06 | 2019-01-11 | 冶金工业规划研究院 | The method for automatic measurement of compound calcium ferrite mine phase content in a kind of sinter |
| CN109632858A (en) * | 2019-01-07 | 2019-04-16 | 天津力神电池股份有限公司 | The rapid detection method of different element relative amounts in a kind of element map |
| CN112444517A (en) * | 2020-11-18 | 2021-03-05 | 华北理工大学 | Method for detecting reduction performance of sinter based on inversion of total amount and form of calcium ferrite of under-mirror image |
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Effective date of registration: 20170705 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Applicant after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Applicant before: Wuhan Iron & Steel (Group) Corp. |
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Application publication date: 20160406 |