CN112730476B - Mineral purity detection method - Google Patents
Mineral purity detection method Download PDFInfo
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- CN112730476B CN112730476B CN202011508520.5A CN202011508520A CN112730476B CN 112730476 B CN112730476 B CN 112730476B CN 202011508520 A CN202011508520 A CN 202011508520A CN 112730476 B CN112730476 B CN 112730476B
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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
- G01N23/02—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 transmitting the radiation through the material
- G01N23/04—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 transmitting the radiation through the material and forming images of the material
- G01N23/046—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 transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/2813—Producing thin layers of samples on a substrate, e.g. smearing, spinning-on
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/2813—Producing thin layers of samples on a substrate, e.g. smearing, spinning-on
- G01N2001/2833—Collecting samples on a sticky, tacky, adhesive surface
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a mineral purity detection method, which comprises the following steps: sticking double-sided adhesive tape on the glass slide; uniformly spreading a mineral raw material on one surface of the glass slide, which is adhered with the double-sided adhesive tape; placing the slide between an X-ray source and an energy detector; obtaining a gray scale image of the X-ray emitted by the X-ray source after the X-ray passes through the mineral raw material through the energy detector; and determining the proportion of preset components in the mineral raw materials according to the gray scale map. The invention improves the detection speed.
Description
Technical Field
The invention relates to the technical field of mineral detection, in particular to a mineral purity detection method.
Background
In the field of mineral processing, the purity of mineral raw materials directly influences the stability of a mineral processing process flow and hardware equipment parameters; in addition, in the field of ore material trade, the purity of the ore material is an important industrial index, directly affecting the price of the trade.
At present, the traditional wet chemical method and physical measurement method are generally used for detecting the purity of the mineral raw material. Wet chemical methods such as acid dissolution and alkali fusion, etc. Physical measurement methods such as X-ray fluorescence and the like. These methods have relatively high measurement accuracy, but mainly have the following disadvantages: 1. the detection period is relatively long, particularly a chemical measurement method usually needs a tedious chemical pretreatment process, and the analysis speed of the 2 and X-ray fluorescence method is relatively high, but the method has high requirements on standard substances and needs a reference substance and a sample to have similar or consistent matrix composition.
Disclosure of Invention
Based on the above, the invention aims to provide a mineral purity detection method to improve the detection speed.
In order to achieve the purpose, the invention provides the following scheme:
a method of mineral purity detection, the method comprising:
sticking double-sided adhesive tape on the glass slide;
uniformly spreading a mineral raw material on one surface of the glass slide, which is adhered with the double-sided adhesive tape;
placing the slide between an X-ray source and an energy detector;
obtaining a gray scale image of the X-ray emitted by the X-ray source after the X-ray passes through the mineral raw material through the energy detector;
and determining the proportion of preset components in the mineral raw materials according to the gray scale map.
Optionally, the determining the ratio of preset components in the mineral raw material according to the gray scale map specifically includes:
determining gray value intervals corresponding to all components in the mineral raw materials;
determining the area occupied by each component in the gray-scale image according to the gray-scale value interval corresponding to each component;
and determining the ratio of the preset components according to the area occupied by each component.
Optionally, the determining, according to the gray value interval corresponding to each component, the area occupied by each component in the gray scale map specifically includes:
and determining the occupied area of each component in the gray-scale image by adopting a normalization method according to the gray-scale value interval corresponding to each component.
Optionally, the step of uniformly spreading the mineral raw material on the surface of the glass slide to which the double-sided adhesive tape is adhered specifically includes:
uniformly spreading mineral raw material particles on one surface of the glass slide, which is adhered with a double-sided adhesive tape;
and shaking off the non-adhered mineral raw material particles.
Optionally, the mineral feedstock particles are adhered to the glass slide in an area of greater than or equal to 2cm 2 。
Optionally, before obtaining, by the energy detector, a gray-scale map of the mineral raw material after the X-rays emitted by the X-ray source pass through the mineral raw material, the method further includes:
and turning on the X-ray source, and setting working parameters of the X-ray source, wherein the working parameters comprise voltage, current and exposure time.
Optionally, the energy detector is a flat panel detector.
Optionally, the flat panel detector is a 16-bit a/D converted flat panel detector.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a mineral purity detection method, which can detect the purity of an ore raw material by obtaining a gray level image of X rays emitted by an X-ray source after the X rays pass through the mineral raw material through an energy detector and counting different gray level intervals, thereby improving the detection speed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic flow chart of a mineral purity detection method according to the present invention;
FIG. 2 is a schematic view of a mineral purity detection apparatus according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a mineral purity detection method to improve the detection speed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic flow chart of a mineral purity detection method of the present invention, fig. 2 is a schematic view of a mineral purity detection apparatus of the present invention, and as shown in fig. 1-2, a mineral purity detection method includes:
step 101: double-sided tape is stuck on the slide glass 3.
Step 102: the mineral raw material is uniformly spread on the surface of the glass slide 3, which is adhered with the double-sided adhesive tape.
Step 103: the slide 3 is placed between the X-ray source 1 and the energy detector 4. The main axis of the X-ray emitted by the X-ray source 1 is vertical to the carrier the direction of the plane of the slide 3 penetrates the mineral feedstock particles 2.
Step 104: and obtaining a gray scale image of the X-ray emitted by the X-ray source 1 after the X-ray passes through the mineral raw material through the energy detector 4.
Step 105: and determining the proportion of preset components in the mineral raw materials according to the gray scale map.
Wherein, step 105 specifically comprises:
and determining gray value intervals corresponding to all components in the mineral raw materials.
And determining the area occupied by each component in the gray-scale image according to the gray-scale value interval corresponding to each component.
And determining the ratio of the preset components according to the area occupied by each component.
Wherein, the determining the area occupied by each component in the gray-scale image according to the gray-scale value interval corresponding to each component specifically comprises:
and determining the occupied area of each component in the gray-scale image by adopting a normalization method according to the gray-scale value interval corresponding to each component.
Wherein, step 102 specifically comprises: the mineral raw material particles 2 are uniformly spread on the surface of the glass slide 3 on which the double-sided adhesive tape is adhered.
The non-bonded mineral material particles 2 are shaken off.
The area of the mineral raw material particles 2 stuck on the glass slide 3 is more than or equal to 2cm 2 。
Before step 104, the method further includes: and opening the X-ray source 1, and setting working parameters of the X-ray source 1, wherein the working parameters comprise voltage, current and exposure time.
The energy detector 4 is a flat panel detector.
The flat panel detector is a 16-bit A/D conversion flat panel detector.
According to the invention, the gray value of the mineral raw material particles 2 under X-CT is obtained by random sampling and taking X-CT (computed tomography CT) as a measuring means, and different minerals have different X-ray gray values due to different energy attenuation coefficients of the minerals to the X-CT. The purity of the ore raw material can be rapidly identified by counting different gray scale intervals through an image processing technology.
The method for detecting the purity of the mineral does not need chemical agents, is an environment-friendly method, and realizes the rapid identification of the purity of the mineral raw materials. In particular to an X-ray source 1 arrangement, a flat panel detector and image processing techniques.
The invention is mainly suitable for mineral raw materials with relatively stable components, large difference between impurity minerals and target minerals, and mineral principle particles in a certain range.
The invention has the beneficial effects that:
(1) The sample preparation is simple and easy to master.
(2) The analysis speed is high, and the operation cost is low.
(3) The method is a green, nondestructive and environment-friendly analysis and test method.
(4) The method is suitable for testing the purity of various single mineral products.
(5) Has the potential function of tracing the source of raw materials from different sources or batches.
(6) Abnormal particles in the pure mineral particles can be identified rapidly.
The method for detecting the purity of minerals according to the present invention will be described with reference to the following examples.
Example 1
Step one, uniformly spreading quartz sand particles (mineral raw material particles 2) with the particle size of 20-30 meshes on a glass slide 3 stuck with a double-sided adhesive tape, and ensuring that the area of a region where the mineral particles are stuck is not less than 2cm 2 。
And step two, shaking off the particles which are not firmly bonded.
And step three, placing the glass slide 3 attached with the mineral raw material particles 2 between the X-ray source 1 with adjustable voltage and a flat panel detector with 16-position A/D conversion, so that the main axis of the X-ray penetrates through the mineral sample particles along the direction vertical to the plane of the glass slide 3, as shown in figure 2.
And step four, turning on the X-ray source 1, setting the voltage of the X-ray source 1 to be 40Kv, setting the current to be 100 muA, and setting the exposure time to be 1s, thereby obtaining a gray-scale image of the X-ray after the X-ray is attenuated by the mineral raw material particles 2.
Step five, processing the gray-scale image according to the following flow through image processing software: setting a 10mm multiplied by 10mm square research area, carrying out binarization processing on the image, respectively setting gray value intervals of 0-9999, 10000-15000 and 15001-65535, and obtaining the projection areas of each particle corresponding to the gray value intervals, which are respectively marked as A0, A1 and A2, wherein A1 is the sum of the areas of all quartz sand particles in the interval of 10000-15000 gray values, and A0 and A2 are the sum of the areas corresponding to impurity component particles.
And sixthly, calculating the areas corresponding to the different gray scale intervals and the occupation ratio of the areas in the total area by a normalization method, and recording the areas as R. The calculation method comprises the following steps: r = A1/(A0 + A1+ A2) × 100%.
Example 2
Step one, uniformly spreading zircon sand particles with the particle size of 60-200 meshes on a glass slide 3 stuck with a double-sided adhesive tape.
And step two, shaking off the particles which are not firmly bonded.
And step three, placing the glass slide 3 attached with the mineral raw material particles 2 between the X-ray source 1 with adjustable voltage and a flat panel detector with 16-bit A/D conversion, so that the X-rays penetrate the mineral sample particles along the direction vertical to the plane of the glass slide 3, as shown in figure 2.
And step four, turning on the X-ray source 1, setting the voltage of the X-ray source 1 to be 160Kv, setting the current to be 10 muA and setting the exposure time to be 5s, and obtaining a corresponding gray-scale image of the X-ray after the X-ray is attenuated by the mineral raw material particles 2.
Step five, processing the gray-scale image according to the following flow through image processing software: setting a square research area of 5mm multiplied by 5mm, carrying out binarization processing on the image, setting gray values of 0-45000, 45001-50000 and 50001-65535 respectively, and obtaining projection areas of each particle corresponding to the gray value interval, wherein the projection areas are marked as A0, A1 and A2 respectively, A1 is the sum of the areas of all zircon sand particles in the gray value interval of 10000-15000, and A0 and A2 are the sum of the areas corresponding to impurity component particles.
And sixthly, calculating the areas corresponding to the different gray scale intervals and the occupation ratio of the areas in the total area by a normalization method, and recording the areas as R. The calculation method comprises the following steps: r = A1/(A0 + A1+ A2) × 100%.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.
Claims (3)
1. A method of detecting mineral purity, the method comprising:
sticking double-sided adhesive tape on the glass slide;
uniformly spreading a mineral raw material on one surface of the glass slide, which is adhered with a double-sided adhesive tape;
placing the slide between an X-ray source and an energy detector;
obtaining a gray scale image of the X-ray emitted by the X-ray source after the X-ray passes through the mineral raw material through the energy detector;
determining the ratio of preset components in the mineral raw materials according to the gray scale map;
the determining the ratio of preset components in the mineral raw materials according to the gray scale map specifically comprises the following steps:
determining gray value intervals corresponding to all components in the mineral raw materials;
determining the area occupied by each component in the gray-scale image according to the gray-scale value interval corresponding to each component;
determining the ratio of the preset components according to the area occupied by each component;
the method for uniformly spreading the mineral raw materials on the surface, adhered with the double-sided adhesive tape, of the glass slide specifically comprises the following steps:
uniformly spreading mineral raw material particles on one surface of the glass slide, which is adhered with a double-sided adhesive tape;
shaking off the non-adhered mineral raw material particles;
the area of the mineral raw material particles stuck on the glass slide is more than or equal to 2cm 2 ；
The energy detector is a flat panel detector; the flat panel detector is a 16-bit A/D conversion flat panel detector.
2. The mineral purity detection method according to claim 1, wherein the determining the area occupied by each component in the gray-scale map according to the gray-scale value interval corresponding to each component specifically comprises:
and determining the occupied area of each component in the gray-scale image by adopting a normalization method according to the gray-scale value interval corresponding to each component.
3. The mineral purity detection method according to claim 1, wherein before obtaining the gray-scale image of the mineral raw material after the X-rays emitted from the X-ray source pass through the energy detector, the method further comprises:
and turning on the X-ray source, and setting working parameters of the X-ray source, wherein the working parameters comprise voltage, current and exposure time.
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| US8068579B1 (en) * | 2008-04-09 | 2011-11-29 | Xradia, Inc. | Process for examining mineral samples with X-ray microscope and projection systems |
| CA2860575C (en) * | 2012-01-13 | 2018-09-18 | Ingrain, Inc. | Method of determining reservoir properties and quality with multiple energy x-ray imaging |
| CN104062308B (en) * | 2014-07-04 | 2017-02-15 | 天津三英精密仪器有限公司 | Rock nondestructive mineral composition detection method |
| CN106198579B (en) * | 2015-06-01 | 2019-03-26 | 中国石油化工股份有限公司 | A kind of method of the content of organic matter in measurement shale |
| CN105067395B (en) * | 2015-06-30 | 2017-09-01 | 中国石油天然气股份有限公司 | Mineral standard sample for nano CT (computed tomography) and preparation method and application thereof |
| CN105628726B (en) * | 2015-12-23 | 2018-08-14 | 中国石油天然气股份有限公司 | Method and system for analyzing mineral composition of tight sandstone |
| CN106950231B (en) * | 2017-03-29 | 2018-07-20 | 中国科学院地质与地球物理研究所 | A kind of rock sample device and method with dual intensity micron CT quantitative judge rock forming minerals |
| CN110873723A (en) * | 2018-09-03 | 2020-03-10 | 中国石油化工股份有限公司 | Processing method of rock core CT scanning image |
| CN110873722A (en) * | 2018-09-03 | 2020-03-10 | 中国石油化工股份有限公司 | Rock core mineral component identification method |
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| CN110599473B (en) * | 2019-09-06 | 2022-04-15 | 中国科学院地质与地球物理研究所 | Method, device and equipment for determining digital core |
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