CN111380887A - Online detection system and method for raw ore - Google Patents
Online detection system and method for raw ore Download PDFInfo
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- CN111380887A CN111380887A CN202010288868.1A CN202010288868A CN111380887A CN 111380887 A CN111380887 A CN 111380887A CN 202010288868 A CN202010288868 A CN 202010288868A CN 111380887 A CN111380887 A CN 111380887A
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- 238000001514 detection method Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 100
- 239000000463 material Substances 0.000 claims abstract description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007493 shaping process Methods 0.000 claims abstract description 17
- 238000004458 analytical method Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000004876 x-ray fluorescence Methods 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 15
- 238000004445 quantitative analysis Methods 0.000 claims description 7
- 238000000862 absorption spectrum Methods 0.000 claims description 5
- 238000004451 qualitative analysis Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 2
- 239000003337 fertilizer Substances 0.000 abstract description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract description 6
- 229940072033 potash Drugs 0.000 abstract description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 abstract description 6
- 235000015320 potassium carbonate Nutrition 0.000 abstract description 6
- 238000003556 assay Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000005188 flotation Methods 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 11
- 229910052700 potassium Inorganic materials 0.000 description 11
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 description 9
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 8
- 229910052749 magnesium Inorganic materials 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 238000012986 modification Methods 0.000 description 6
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- 239000011780 sodium chloride Substances 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
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- 239000001257 hydrogen Substances 0.000 description 1
- RNYJXPUAFDFIQJ-UHFFFAOYSA-N hydron;octadecan-1-amine;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[NH3+] RNYJXPUAFDFIQJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- G01N23/223—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 by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3554—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for determining moisture content
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
Abstract
The invention discloses a raw ore online detection system and a method. The system comprises: the device comprises a raw ore conveying mechanism, a multi-stage material shaping mechanism, an X fluorescence online measuring mechanism, an online moisture measuring mechanism and an industrial control computer. The multi-stage material shaping mechanism is used for material surface flattening treatment; the X fluorescence online measuring mechanism is used for measuring the element components of the material; the online moisture measuring mechanism is used for measuring the moisture of the material; the industrial control computer is used for system control and analysis of the measured element composition data and the water data. The method is preferably suitable for the online detection of the raw materials for producing the potash fertilizer by utilizing the dry lighting halolite ore, can reduce the labor amount of manual assay, and simultaneously solves the problems of errors, data feedback time lag and the like in the manual assay.
Description
Technical Field
The invention relates to the technical field of online detection, in particular to a raw ore online detection system and a raw ore online detection method.
Background
At present, the main domestic methods for producing potash fertilizers by using a flotation method include a cold crystallization-direct flotation method, a reverse flotation-cold crystallization method and a cold decomposition-direct flotation method.
The reverse flotation-cold crystallization process mainly adopts water mining carnallite raw ore, the raw ore is mined to a production workshop by a water mining ship, a sodium chloride flotation agent is added to selectively increase the hydrophobicity of the surface of sodium chloride, so that the sodium chloride floats upwards along with foam and is scraped out, the carnallite is left in slurry, low-sodium carnallite is obtained by dehalogenation, the low-sodium carnallite enters a crystallizer, water is added for decomposition and crystallization, and then the potassium chloride product is obtained by filtering and washing.
The cold crystallization-direct flotation process is developed on the basis of a cold decomposition-direct flotation process, and a crystallizer is mainly adopted for decomposition and crystallization. The cold crystallization-direct flotation and cold decomposition-direct flotation process is mainly suitable for dry mining of carnallite raw ore, and the basic process flow is as follows: the raw ore enters a crusher through an ore feeding device through a belt, and large blocks of the raw ore are crushed to ensure that the integral granularity is below 2 cm; then the mixture enters a crystallizer through a belt conveyor, is hydrolyzed and crystallized by adding water, is added with agents such as octadecylamine hydrochloride and the like in a medium of high-magnesium mother liquor, is uniformly mixed and then enters a flotation device, potassium chloride and sodium chloride are primarily separated through the flotation device, the potassium chloride is in a foam form and is scraped out of the surface layer of the flotation machine, namely crude potassium, and the sodium chloride is discharged out of a system along with the bottom flow of the flotation machine; and the crude potassium is subjected to repulping washing, filtering, drying and packaging to obtain a final product.
In the process of producing the potash fertilizer by the three flotation methods, the raw ore detection mainly adopts a volumetric method. The volumetric method has the advantages of high measuring speed and low cost, is suitable for control and analysis of the production process of the potash fertilizer, but has large manual test amount and lagged feedback data.
Disclosure of Invention
The invention provides a raw ore online detection system and a raw ore online detection method, which are used for solving the problems of large manual assay amount and lagging feedback data in a volumetric method in the prior art.
The second purpose is to improve the accuracy of the on-line detection of the raw ore.
The first technical scheme of the invention is a raw ore online detection system, which is characterized by comprising the following components: a raw ore conveying mechanism for conveying raw ore; the multistage material shaping mechanism is arranged above a conveyor belt of the raw ore conveying mechanism and is used for shaping the conveyed materials; the X fluorescence online measuring mechanism is positioned above a conveyor belt of the raw ore conveying mechanism and is used for carrying out X fluorescence online measurement on the conveyed materials and the online moisture measuring mechanism is used for carrying out online moisture measurement; and an industrial control computer respectively connected with the X fluorescence on-line measuring mechanism and the on-line moisture measuring mechanism and used for analyzing the components and the water content of the raw ore according to the detection values of the X fluorescence on-line measuring mechanism and the on-line moisture measuring mechanism;
the multi-stage material shaping mechanism is used for material surface flattening treatment;
the measuring area of the X fluorescence online measuring mechanism and the measuring area of the online moisture measuring mechanism are arranged at different positions along the conveying direction of the raw ore conveying mechanism.
Preferably, the X-ray fluorescence online measuring mechanism is provided with a distance measuring sensor for measuring the distance between the X-ray fluorescence online measuring mechanism and the raw ore, and the industrial control computer detects distance correction according to the distance measuring sensor.
Preferably, the X-ray fluorescence online measurement mechanism includes: the element fluorescence detector and the X fluorescence light source are matched with each other; wherein the content of the first and second substances,
the X-ray fluorescent light source is used for emitting X-rays with a certain wavelength to the material and exciting the X-ray fluorescent rays with the wavelengths corresponding to different elements in the material;
the element fluorescence detector is used for carrying out qualitative analysis by detecting the wavelength of the X-ray fluorescence and carrying out quantitative analysis by detecting the intensity of the X-ray fluorescence corresponding to each element.
Preferably, the X-ray fluorescence light source continuously emits X-rays with a certain wavelength to the material, and the element fluorescence detector performs the qualitative analysis and the quantitative analysis in real time.
Preferably, the online moisture measuring mechanism includes: the water analyzer and the near-infrared LED light source are matched with each other; wherein the content of the first and second substances,
the near-infrared LED light source is used for emitting near-infrared light rays to the material, so that water molecules in the material absorb part of the near-infrared light rays and reflect the rest part of the near-infrared light rays;
the water analyzer is used for detecting the near infrared light of the reflection part, acquiring an absorption spectrum and acquiring the water content in the material according to the absorption spectrum.
Preferably, the near-infrared LED light source continuously emits near-infrared light to the material, and the water analyzer performs water content analysis in real time.
The second technical scheme is a raw ore online detection method which is characterized by comprising the following steps:
a first step (S42) of flattening the surface of the material by using a multi-stage material shaping mechanism;
a second step (S43) in which the X fluorescence on-line measuring mechanism detects the element composition of the material,
a third step (S44) of detecting the moisture of the material by an online moisture measuring mechanism;
and a fourth step (S45) of analyzing the elemental composition and the moisture content of the material based on the detection values of the first and second steps.
Preferably, in the fourth step (S45), the time t for the material 20 detected by the X-ray fluorescence online measuring means 23 to move to the detection region 24a is calculated based on the material conveying speed, the distance S between the detection region 23a of the X-ray fluorescence online measuring means and the detection region 24a of the online moisture measuring means, and the elemental composition in the material 20 is analyzed and detected using the moisture content detected by the online moisture measuring means 24 and the wavelength and intensity of the fluorescent X-ray detected by the X-ray fluorescence online measuring means 23 before the time t.
The raw ore online detection system and the method are particularly suitable for online detection of raw materials for producing potash fertilizers by utilizing the dry lighting halolite ores, can reduce the labor amount of manual testing, and simultaneously solve the problems of errors, data feedback time lag and the like in the manual testing. And the material components are measured on line in the potassium fertilizer production process by using an X-ray fluorescence analysis method, and the quality monitoring big data from the production source is provided to serve for the process control.
Drawings
FIG. 1 is a schematic structural diagram of a raw ore on-line detection system used in a forward flotation production process;
FIG. 2 is an explanatory diagram of the arrangement of an X fluorescence on-line measuring mechanism and an on-line moisture measuring mechanism in the raw ore on-line detection system used in the forward flotation production process;
FIG. 3 is an illustration of the principle of on-line detection of raw ore;
fig. 4 is a flow chart of the raw ore on-line detection method.
Detailed Description
In the following detailed description of the preferred embodiments of the invention, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration, specific features of the invention, such that the advantages and features of the invention may be more readily understood and appreciated. The following description is an embodiment of the claimed invention, and other embodiments related to the claims not specifically described also fall within the scope of the claims.
The online raw ore detection system used in the direct flotation production process is described below as an example.
Fig. 1 is a schematic structural diagram of a raw ore online detection system used in a direct flotation production process. Referring to fig. 1, the raw ore on-line detection system is composed of a raw ore conveying mechanism 11, a multi-stage material shaping mechanism 22 arranged above a conveyor belt 21 of the raw ore conveying mechanism 11, a material component detection mechanism 30 and an industrial control computer 15. The material component detection mechanism 30 is connected to the industrial control computer 15 for detecting the components and water content in the material.
The material component detecting mechanism 30 includes an X-ray fluorescence online measuring mechanism 23, and an online moisture measuring mechanism 24 (see fig. 2). The X-ray fluorescence online measuring means 23 and the online moisture measuring means 24 will be described in detail later.
As shown in fig. 2, the multi-stage material shaping mechanism 22, the X-ray fluorescence on-line measuring mechanism 23, and the on-line moisture measuring mechanism 24 are arranged in series at a certain distance along the conveying direction of the conveyor belt 21.
Dry mined carnallite (material) 20 for producing potash fertilizer is conveyed by a conveyor belt (conveyor belt) 21 of a raw ore conveying mechanism 21 (from left to right in fig. 1 and 2). When the dry mining carnallite 20 passes through the multi-stage material shaping mechanism 12, the multi-stage material shaping mechanism 22 is used for flattening the surface of the material, so that the surface of the material is smooth and flat, and the subsequent mechanisms can acquire detection data and analyze conveniently.
The X-fluorescence online measuring mechanism 23 and the online moisture measuring mechanism 24 are arranged above the conveyor belt 21 and respectively detect the materials 20 without contacting.
The X-ray fluorescence online measuring mechanism 23 is composed of an X-ray tube 231 and a fluorescence detector 232, and detects the elemental composition in the material 20 by using an X-ray fluorescence analysis method. The principle is that the material 20 is irradiated by the X-ray with a certain wavelength generated by the X-ray tube 231, so that the inner layer electrons outside the atomic nucleus of the element jump to form a hole, which is in an excited state at this time, and then the outer layer electrons jump to the inner layer hole, so that the atoms return to a ground state. During the process from high energy to low energy, the atoms release reduced energy in the form of X-rays, thereby generating lines of specific energy (characteristic X-fluorescence of the element). The wavelengths of the X-ray generated by the excitation of different elements are different. The fluorescence detector 232 detects the wavelength and intensity of the fluorescent X-ray, and the industrial control computer 15 performs quantitative analysis on the Cl, K, Mg, S and Ca elements in the material according to the wavelength and intensity of the fluorescent X-ray to detect the content of the Cl, K, Mg, S and Ca elements.
In this embodiment, the X-ray fluorescence online measurement mechanism 23 is provided with a distance measurement sensor, and when the industrial control computer 15 performs quantitative analysis, compensation is performed according to the distance between the materials 20 of the X-ray fluorescence online measurement mechanism 23 detected by the distance measurement sensor, so as to ensure the accuracy of element detection.
The online moisture measuring mechanism 14 is located downstream of the X-ray fluorescence online measuring mechanism 23 in the conveying direction of the material 20, and is used for measuring moisture of the material 20. the principle of moisture analysis is that according to the principle that near-infrared wavelengths are absorbed by water molecules, oxygen-hydrogen bonds in water strongly absorb near-infrared light rays with specific wavelengths, an LED light source which emits the near-infrared light rays by using the infrared emitting head 241 irradiates the material 20, water molecules in the material 20 absorb a part of the near-infrared light rays, and then the rest of the light rays are reflected back to the light detector 242 of the measuring instrument. The absorbed light of the wavelength depends on the amount of water molecules encountered by the near infrared energy beam, the absorbed light is called absorption spectrum, and the industrial control computer 15 analyzes the moisture content in the material 20 according to the linear relationship between the spectrum and the moisture.
Because the multi-stage material shaping mechanism 22, the X-fluorescence online measuring mechanism 23 and the online moisture measuring mechanism 24 are arranged above the conveyor belt (conveyor belt) 21 of the raw ore conveying mechanism 11 along the conveying direction, the materials 20 flowing through the lower part are detected in real time, the detection result is more representative, the whole detection process does not need to be sampled, the materials are not contacted, the belt operation is not influenced, the material (raw ore components) result is given in real time, the industrial control computer 15 is in butt joint with an industrial internet control system through Ethernet communication, the automatic control of the positive flotation production process can be efficiently participated in and guided, the product quality is improved, and the product cost is reduced.
The on-line detection system for the crude ore in the direct flotation production process has the characteristics of convenience, rapidness, high efficiency, accuracy and low cost, does not damage the sample, does not consume chemical reagents, has small sampling interval and high analysis speed, does not pollute the environment and the like. The method does not need sample preparation and non-contact, can analyze multiple elements simultaneously, has high analysis speed, can be regarded as continuous detection and timely data feedback, can carry out remote analysis, and has small analysis error. Real-time on-line analysis, and KCl and MgCl can be fed back to the control system every 2min2、CaSO4NaCl and H2O (total water) content. And the method can also participate in the establishment of mathematical model calculation and big data analysis in the production process, and realize the fine control of the potassium fertilizer production process.
The following describes modifications of the present invention.
Modification example
The detection range 23a of the X-ray fluorescence on-line measuring mechanism 23 is smaller than or equal to the detection range 24a of the on-line moisture measuring mechanism 24, and the detection range 23a is separated from the detection range 24a by a distance S in the conveying direction V of the conveyor belt 21 (see fig. 3).
The industrial control computer 15 quantitatively analyzes the Cl, K, Mg, S and Ca elements in the material according to the wavelength and intensity of the fluorescent X-ray and the moisture content in the material 20. That is, after the wavelength and intensity information of the fluorescent X-ray detected by the fluorescent detector 232 in the X-fluorescence online measurement mechanism 13 is transmitted to the industrial control computer 15, the industrial control computer 15 firstly stores the information in the buffer, and after a certain time t, quantitatively analyzes the Cl, K, Mg, S, and Ca elements by combining the detected moisture content, that is, compensates the influence of moisture on the element analysis.
The certain time t is calculated from the conveying speed of the conveyor belt 21 and the distance S between the detection range 23a and the detection range 24 a.
Therefore, the X fluorescence online measuring mechanism 23 and the online moisture measuring mechanism 24 detect the same material, and can accurately perform quantitative analysis on Cl, K, Mg, S and Ca elements. That is, the dry-mined carnallite 20 is affected by the conditions at the time of crystallization and the moisture content thereof is not fixed, and the X-ray fluorescence online measuring mechanism 23 and the online moisture measuring mechanism 24 serve as two different detecting devices, and the wavelength, intensity and moisture content of the detected fluorescent X-ray are substantially the values of different samples because of the different positions of detection.
If the detection value of the online X-ray fluorescence measuring mechanism 13 is directly used to correct the detection value of the online X-ray fluorescence measuring mechanism, the accuracy of the analysis of the Cl, K, Mg, S, and Ca elements cannot be guaranteed, and particularly, when carnallite (materials) collected at different locations are mixed together, the effect of correcting the moisture content on the X-ray fluorescence detection cannot be achieved, and the result of error expansion may be caused.
In the modification, the industrial control computer 15 can quantitatively analyze Cl, K, Mg, S, and Ca elements with respect to the same sample (detection target) by using the detection values of the X fluorescence online measurement mechanism 23 and the online moisture measurement mechanism 24, thereby further ensuring the accuracy of the detection result.
Fig. 4 is a flow chart of the raw ore on-line detection method.
Referring to fig. 4, the method comprises the following steps:
in step S41, the raw ore conveying mechanism 11 is started to convey the material 20 by the conveyor belt 21.
Step S42, when the material 20 passes through the multi-stage material shaping mechanism 22, the multi-stage material shaping mechanism 20 flattens the surface of the material 20, so that the surface of the material 20 meets the detection requirement.
Step S43, when the shaped material 20 passes through the detection area 23a of the X-ray fluorescence online measurement mechanism 23 along with the movement of the conveyor belt 21, the X-ray fluorescence online measurement mechanism 23 detects the elemental composition of the material, and the detection result is transmitted to the industrial control computer 15.
In step S44, when the material 20 passes through the detection area 24a of the online moisture measuring mechanism 24, the online moisture measuring mechanism 24 detects the moisture of the material.
In step S45, the industrial control computer 15 analyzes and detects the elemental composition and the water content in the material 20 based on the detected values of the X-ray fluorescence online measuring mechanism 23 and the online moisture measuring mechanism 24, or calculates the time t when the material 20 detected by the X-ray fluorescence online measuring mechanism 23 moves to the detection region 24a based on the conveying speed of the conveyor belt 21 and the distance S between the detection region 23a and the detection region 24a, and analyzes and detects the elemental composition in the material 20 using the wavelength and the intensity of the fluorescent X-ray detected by the X-ray fluorescence online measuring mechanism 23 before the moisture content detected by the online moisture measuring mechanism 24 and the time t.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An on-line raw ore detection system is characterized by comprising: a raw ore conveying mechanism for conveying raw ore; the multistage material shaping mechanism is arranged above a conveyor belt of the raw ore conveying mechanism and is used for shaping the conveyed materials; the X fluorescence online measuring mechanism is positioned above a conveyor belt of the raw ore conveying mechanism and is used for carrying out X fluorescence online measurement on the conveyed materials and the online moisture measuring mechanism is used for carrying out online moisture measurement; and an industrial control computer respectively connected with the X fluorescence on-line measuring mechanism and the on-line moisture measuring mechanism and used for analyzing the components and the water content of the raw ore according to the detection values of the X fluorescence on-line measuring mechanism and the on-line moisture measuring mechanism;
the multi-stage material shaping mechanism is used for material surface flattening treatment;
the measuring area of the X fluorescence online measuring mechanism and the measuring area of the online moisture measuring mechanism are arranged at different positions along the conveying direction of the raw ore conveying mechanism.
2. The on-line ore detecting system of claim 1, wherein the X-ray fluorescence on-line measuring mechanism is provided with a distance measuring sensor for measuring the distance between the X-ray fluorescence on-line measuring mechanism and the ore, and the industrial control computer detects the distance correction according to the distance measuring sensor.
3. The on-line raw ore detection system according to claim 1, wherein the X-ray fluorescence on-line measuring mechanism comprises: the element fluorescence detector and the X fluorescence light source are matched with each other; wherein the content of the first and second substances,
the X-ray fluorescent light source is used for emitting X-rays with a certain wavelength to the material and exciting the X-ray fluorescent rays with the wavelengths corresponding to different elements in the material;
the element fluorescence detector is used for carrying out qualitative analysis by detecting the wavelength of the X-ray fluorescence and carrying out quantitative analysis by detecting the intensity of the X-ray fluorescence corresponding to each element.
4. The on-line raw ore detection system according to claim 3, wherein the X-ray fluorescence light source continuously emits X-rays with a certain wavelength to the material, and the elemental fluorescence detector performs the qualitative analysis and the quantitative analysis in real time.
5. The on-line raw ore detection system according to claim 1, wherein the on-line moisture measurement mechanism comprises: the water analyzer and the near-infrared LED light source are matched with each other; wherein the content of the first and second substances,
the near-infrared LED light source is used for emitting near-infrared light rays to the material, so that water molecules in the material absorb part of the near-infrared light rays and reflect the rest part of the near-infrared light rays;
the water analyzer is used for detecting the near infrared light of the reflection part, acquiring an absorption spectrum and acquiring the water content in the material according to the absorption spectrum.
6. The on-line raw ore detection system according to claim 5, wherein the near-infrared LED light source continuously emits near-infrared light to the material, and the water analyzer performs water content analysis in real time.
7. An on-line raw ore detection method, which is implemented by the on-line raw ore detection system of any one of claims 1 to 6, and comprises the following steps:
a first step (S42) of flattening the surface of the material by using a multi-stage material shaping mechanism;
a second step (S43) in which the X fluorescence on-line measuring mechanism detects the element composition of the material,
a third step (S44) of detecting the moisture of the material by an online moisture measuring mechanism;
and a fourth step (S45) of analyzing the elemental composition and the moisture content of the material based on the detection values of the first and second steps.
8. The on-line ore detecting method according to claim 7,
in the fourth step (S45), the time t for the material 20 detected by the X-ray fluorescence online measuring means 23 to move to the detection region 24a is calculated based on the material conveying speed, the distance S between the detection region 23a of the X-ray fluorescence online measuring means and the detection region 24a of the online moisture measuring means, and the elemental composition in the material 20 is analyzed and detected using the moisture content detected by the online moisture measuring means 24 and the wavelength and intensity of the fluorescent X-ray detected by the X-ray fluorescence online measuring means 23 before the time t.
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