Sintered ore sample preparation method, device, equipment, medium and program product

Abstract

The invention discloses a sample preparation method, device and equipment of sintered ore, a medium and a program product, and the method comprises the steps that first coarse grinding parameters are determined according to the section of the sintered ore, the type of the sintered ore and the tensile strength range, and the first coarse grinding parameters comprise the contact diameter and pressure of a coarse grinding head, the rotating speed of a power head and the rotating speed of the coarse grinding head; the sinter cross section is subjected to multiple times of rough grinding according to the first rough grinding parameter till the flatness and the smoothness of the sinter cross section reach the first preset condition; at least three stages of polishing are carried out on the sintered ore section according to the first polishing parameters till the grinding crack and mirror surface parameters of the sintered ore section meet second preset conditions, the hardness of polishing cloth in the three stages of polishing is gradually reduced, and the average particle size of particles in polishing liquid is gradually reduced. The method provided by the invention solves the problem that manual sample preparation of sinter wastes time and labor, and improves the qualified rate of sample preparation.

Description

Technical Field

[0001] The present application belongs to the technical field of sintered ore detection, and specifically relates to a method, device, equipment, medium and program product for preparing samples of sintered ore. Background Art

[0002] Sintered ore is the main raw material for blast furnace ironmaking, and its quality has a great impact on blast furnace ironmaking. With the fierce competition in the steel industry in recent years, in order to reduce costs and save resources, some low-cost iron ores need to be used, and sintered ore is generally used. Sintered ore prepared with raw materials such as ore powder has unstable quality in metallurgical properties, such as poor strength. The reason is that the mineral composition and microstructure of sintered ore affect the metallurgical properties of sintered ore. Therefore, it is necessary to maintain or detect whether the quality of sintered ore of the same batch or different batches is stable. The detection of sintered ore generally studies its microstructure. In the research process, the sintered ore needs to be cut, boiled and sampled, ground step by step with water-abrasive paper, polished, etc. These processes are cumbersome and time-consuming, but have a huge impact on the direct observation of the microstructure. Among them, grinding and polishing are time-consuming and labor-intensive difficulties in these links.

[0003] Therefore, improvement is urgently needed. Summary of the invention

[0004] In view of this, the present application provides a method for sampling sintered ore, a method, device, equipment, medium and program product for sampling sintered ore, aiming to solve the problem of time-consuming and labor-intensive manual sampling of sintered ore and improve the qualified rate of sampling.

[0005] In a first aspect, an embodiment of the present application provides a method for preparing a sample of a sintered ore, comprising: Determine the first rough grinding parameters according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength, wherein the first rough grinding parameters include the contact diameter and pressure of the rough grinding head, the rotation speed of the power head and the rotation speed of the rough grinding head; The sintered ore cross section is subjected to multiple rough grinding with the first rough grinding parameter until the flatness and smoothness of the sintered ore cross section meet the first preset condition; The sintered ore section is polished in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the sintered ore section reach the second preset condition, wherein the hardness of the polishing cloth in the three-stage polishing gradually decreases and the average particle size of the particles in the polishing liquid gradually decreases.

[0006] In some optional embodiments, the first coarse grinding parameter is determined according to the cross section of the sintered ore, the type of the sintered ore, and the range of tensile strength, including: According to the type of sintered ore, the types of minerals in the sintered ore are obtained; According to the cross section of the sintered ore, the type of mineral and the range of tensile strength, a preset value of the contact diameter, a preset value of the pressure, a preset value of the rotation speed of the power head and a preset value of the rotation speed of the rough grinding head are obtained; According to the preset values ​​of contact diameter, pressure, power head speed and rough grinding head speed, the sintered ore section is rough ground multiple times with the first rough grinding parameters until the flatness and smoothness of the sintered ore section meet the first preset conditions.

[0007] In some optional embodiments, according to the cross section of the sintered ore, the type of mineral and the range of tensile strength, the preset value of the contact diameter, the preset value of the pressure, the preset value of the power head speed and the preset value of the rough grinding head speed are obtained, including: According to the sinter cross section, mineral type, tensile strength range and historical rough grinding data, the preset range of contact diameter, the preset range of pressure, the preset range of power head speed and the preset range of rough grinding head speed are obtained; According to the preset range of contact diameter, the preset range of pressure, the preset range of power head speed and the preset range of rough grinding head speed, the parameters corresponding to the flatness and smoothness of the sintered ore cross section that meet the first preset condition are screened to obtain the preset value of pressure, the preset value of power head speed and the preset value of rough grinding head speed.

[0008] In some optional embodiments, the sintered ore cross section is subjected to multiple rough grinding with the first rough grinding parameter until the flatness and smoothness of the sintered ore cross section meet the first preset condition, including: Performing a first rough grinding on the sintered ore cross section with a first rough grinding parameter; The cross section of the sintered ore is subjected to a second rough grinding with the first rough grinding parameters until the flatness and smoothness of the cross section of the sintered ore reach a first preset condition; the first scratch direction in the first rough grinding and the second scratch direction in the second rough grinding intersect.

[0009] In some optional embodiments, the direction of the first scratch in the first rough grinding and the direction of the second scratch in the second rough grinding are 90 degrees.

[0010] In some optional embodiments, the sintered ore cross section is subjected to multiple rough grinding with the first rough grinding parameter until the flatness and smoothness of the sintered ore cross section meet the first preset condition, including: The cross section of the sintered ore is subjected to a third rough grinding with a first sandpaper and a first rough grinding parameter for multiple times until the grinding marks disappear in a first field of view; The cross section of the sintered ore is subjected to a fourth rough grinding with a second sandpaper and a first rough grinding parameter for multiple times until the grinding marks disappear in a second field of view; wherein the mesh number of the second sandpaper is greater than the mesh number of the first sandpaper or the particle size of the first particles in the first sandpaper is greater than the particle size of the second particles in the second sandpaper; The sintered ore cross section is coarsely ground with a first coarse grinding parameter until the flatness and smoothness of the sintered ore cross section meet a first preset condition.

[0011] In some optional embodiments, the rough grinding includes: the rough grinding head rotates clockwise and the power head rotates counterclockwise.

[0012] In some optional embodiments, the three-stage polishing includes the polishing grinding head rotating in a first direction and the polishing power head rotating in the first direction.

[0013] In some optional embodiments, the three-stage polishing includes, in sequence: First polishing: polishing with a VerduTex polishing cloth moistened with a diamond suspension having an average particle size of 3 microns; the polishing cloth is placed on the surface of the polishing grinding head; Second polishing: polishing with a Microcloth polishing cloth moistened with an aluminum oxide suspension having an average particle size of 0.05 microns; Third polishing: Polishing is performed with a Chemomet polishing cloth moistened with an aluminum oxide suspension having an average particle size of 0.05 μm.

[0014] In some optional embodiments, the first polishing parameter includes polishing pressure, polishing power head rotation speed and polishing grinding head rotation speed; Before the sintered ore section is polished in at least three stages with the first polishing parameter until the wear scar and mirror surface parameters of the sintered ore section reach the second preset condition, the method further comprises: According to the type of sintered ore, the tensile strength range and the historical polishing data, the preset range of polishing pressure, the preset range of polishing power head speed and the preset range of polishing grinding head speed are obtained; According to the preset range of polishing pressure, the preset range of polishing power head speed and the preset range of polishing grinding head speed, the parameters corresponding to the wear marks and mirror parameters of the sintered ore cross section that meet the second preset condition are screened to obtain the preset value of polishing pressure, the preset value of polishing power head speed and the preset value of polishing grinding head speed.

[0015] In a second aspect, an embodiment of the present application provides a sintered ore sample preparation device, comprising: A determination module, used to determine the first rough grinding parameters according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength, wherein the first rough grinding parameters include the contact diameter and pressure of the rough grinding head, the rotation speed of the power head and the rotation speed of the rough grinding head; A rough grinding module, used for rough grinding the cross section of the sintered ore for multiple times with a first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore meet a first preset condition; The polishing module is used to polish the sintered ore section in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the sintered ore section reach the second preset conditions, the hardness of the polishing cloth in the three-stage polishing gradually decreases, and the average particle size of the particles in the polishing liquid gradually decreases.

[0016] In a third aspect, an embodiment of the present application provides a sintered ore sample preparation device, the device comprising: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the method for preparing samples of sintered ore in any of the above embodiments is implemented.

[0017] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, the method for preparing a sample of a sintered ore according to any of the above embodiments is implemented.

[0018] In a fifth aspect, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the method for preparing samples of sintered ore of any of the above embodiments.

[0019] This application has at least the following beneficial effects: The embodiments of the present application provide a method, device, equipment, medium and program product for preparing samples of sintered ore. The method determines a first rough grinding parameter according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength, and performs multiple rough grinding of the cross section of the sintered ore with the first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore reach a first preset condition; in the polishing stage, the cross section of the sintered ore is polished in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the cross section of the sintered ore reach a second preset condition, wherein the hardness of the polishing cloth in the three-stage polishing is gradually reduced and the average particle size of the particles in the polishing liquid is gradually reduced, which is beneficial to scratching the cross section of the sintered ore and obtaining a more uniform surface effect, so as to facilitate the subsequent determination of the performance of the sintered ore by analyzing the more accurate and precise mineral composition and microstructure in the cross section, which is beneficial to the steelmaking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation regulations of this application, the following is a brief introduction to the drawings required for use in the embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic flow chart of a method for preparing samples of sintered ore provided in an embodiment of the present application.

[0022] Figure 2 A schematic diagram of a process for determining first coarse grinding parameters provided in an embodiment of the present application.

[0023] Figure 3 A schematic flow chart of a rough grinding process according to an embodiment of the present application is shown.

[0024] Figure 4A cross-sectional view of a sintered ore sample of the present application is shown.

[0025] Figure 5 A cross-sectional view of a sintered ore sample in another embodiment of the present application is shown.

[0026] Figure 6 A schematic diagram of the structure of a sample preparation device for sintered ore provided in an embodiment of the present application.

[0027] Figure 7 A schematic diagram of the structure of the sintered ore sample preparation equipment provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Sintered ore is the main raw material for blast furnace ironmaking, and its quality has a great impact on blast furnace ironmaking. The quality of sintered ore is generally determined by observing the mineral phase composition and distribution in the cross section of sintered ore. Sintered ore is a collection of various minerals, such as hematite (Fe 2 O 3 ), magnetite (Fe 3 O 4 ))、Calcium ferrite(CaO·Fe 2 O 3 The proportion and distribution of different mineral phases have a significant impact on the metallurgical properties of sintered ore.

[0031] Sintered ore has a certain hardness and brittleness. New cracks may be generated or existing cracks may be extended during the cutting process. At the same time, the heat generated by cutting may also change the microstructure of the sample, such as causing changes in local mineral phases. Therefore, when cutting sintered ore to prepare cross-sections, there are often problems such as low automation, high rework rate, and high failure rate, which wastes a lot of time and is difficult to operate.

[0032] In addition, the surface of sintered ore is uneven, and it is difficult to ensure the flatness and glossiness of the entire cross section during grinding and polishing. For example, an uneven cross section will affect the clarity of the image and the accuracy of the analysis results during microscopic observation or other analysis (such as scanning electron microscopy analysis).

[0033] In addition, during the polishing process, defects such as scratches are prone to occur, which may be mistaken for cracks or other structural features inside the sinter, further affecting the clarity of the image and the accuracy of the analysis results.

[0034] The embodiments of the present application provide a method, device, equipment, medium and program product for preparing samples of sintered ore, which can solve the problem of time-consuming and labor-intensive manual sample preparation, realize automatic rough grinding and polishing for different sintered ores, ensure that the cross section of the sintered ore has no wear marks, the cross section is flat and has a mirror-like gloss, and improve the accuracy of judging the mineral composition and microstructure of the sintered ore.

[0035] Figure 1 A schematic flow chart of a method for preparing samples of sintered ore provided in an embodiment of the present application.

[0036] The method for preparing a sintered ore sample provided in the embodiment of the present application is as follows: Figure 1 As shown, the method for preparing a sample of sintered ore includes the following steps: S100 to S300.

[0037] S100, determining first rough grinding parameters according to the cross section of the sintered ore, the type of the sintered ore, and the range of tensile strength, wherein the first rough grinding parameters include a contact diameter and pressure of a rough grinding head, a rotation speed of a power head, and a rotation speed of a rough grinding head.

[0038] The contact diameter of the rough grinding head can be understood as the contact diameter between the sintered ore cross section and the rough grinding head.

[0039] For example, the contact diameter of the rough grinding head can be 2-45 mm, and can be 6-12 mm. The pressure can be the pressure directly set according to the contact for rough grinding. For example, the contact diameter of 30 mm can set the pressure value to 20-30 N, and can be 25 N. The speed of the power head for rough grinding can be 30 to 50 rpm, and can be 50 rpm. The speed of the rough grinding head can be 250 to 350 rpm, and can be 300 rpm.

[0040] In this step, by determining the first rough grinding parameter, the rough grinding process of the sintered ore cross section can be fixed, thereby avoiding the uneven cross section caused by the unstable rough grinding process and the time-consuming and labor-intensive problems caused by manual sample preparation.

[0041] In some optional embodiments, the first coarse grinding parameter may be determined according to the cross section of the sintered ore, the type of the sintered ore, and the range of tensile strength.

[0042] Figure 2 A schematic diagram of a process for determining first coarse grinding parameters provided in an embodiment of the present application.

[0043] S100, determine the first coarse grinding parameters according to the sinter cross section, sinter type and tensile strength range; see Figure 2 , specifically: S110, obtaining the types of minerals in the sintered ore according to the types of the sintered ore; S120, obtaining a preset value of a contact diameter, a preset value of a pressure, a preset value of a power head speed, and a preset value of a rough grinding head speed according to a cross section of the sintered ore, a type of ore, and a range of tensile strength; S130, determining a first rough grinding parameter according to a preset value of the contact diameter, a preset value of the pressure, a preset value of the power head speed, and a preset value of the rough grinding head speed. In this step, the first rough grinding parameter may be a preset value of the contact diameter, a preset value of the pressure, a preset value of the power head speed, and a preset value of the rough grinding head speed.

[0044] In this step, the types of sintered ore are roughly divided, for example, they can be divided according to the basicity of the sintered ore, and the mineral types in the sintered ore are classified according to the basicity, for example, minerals with basicity greater than 12, minerals with basicity of 6 to 12, and minerals with basicity less than 6.

[0045] The embodiment of the present application sets the first coarse grinding parameter for the sintered ore cross section according to the properties of the sintered ore cross section and the sintered ore itself, and performs coarse grinding automatically, which is beneficial to maintaining stable pressure on the sintered ore cross section and performing coarse grinding uniformly, and is beneficial to eliminating surface scratches and avoiding micro cracks.

[0046] In some optional embodiments, S120, according to the cross section of the sintered ore, the type of mineral and the range of tensile strength, a preset value of the contact diameter, a preset value of the pressure, a preset value of the power head speed and a preset value of the rough grinding head speed are obtained, including: S121, according to the sinter ore cross section, mineral type, tensile strength range and historical rough grinding data, obtain a preset range of contact diameter, a preset range of pressure, a preset range of power head speed and a preset range of rough grinding grinding head speed; S122, based on the preset range of contact diameter, the preset range of pressure, the preset range of power head speed and the preset range of rough grinding head speed, the parameters corresponding to the flatness and smoothness of the sintered ore cross section that meet the first preset condition are screened to obtain the preset value of pressure, the preset value of power head speed and the preset value of rough grinding head speed.

[0047] The historical rough grinding data is constructed based on the correspondence between the sinter ore cross section, mineral type, tensile strength range and the corresponding rough grinding parameters in the historical data.

[0048] In the historical rough grinding data, according to the preset range of contact diameter, the preset range of pressure, the preset range of power head speed and the preset range of rough grinding head speed, the parameters corresponding to the flatness and smoothness of the sintered ore cross section that meet the first preset conditions can be screened and corrected to select appropriate first rough grinding parameters.

[0049] The embodiment of the present application screens historical rough grinding data according to the cross section of the sintered ore and the properties of the sintered ore itself, sets the first rough grinding parameters for the cross section of the sintered ore, and performs automated rough grinding, which is beneficial to improving the quality of rough grinding.

[0050] In some optional embodiments, S100, determining a first rough grinding parameter includes: The first rough grinding parameter is obtained to determine the first rough grinding parameter. The first rough grinding parameter can be obtained by inputting the input device by the staff based on the cross section of the sintered ore and the properties and experience of the sintered ore itself.

[0051] S200, rough grinding the cross section of the sintered ore for multiple times using a first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore meet a first preset condition.

[0052] It is understood that the coarse grinding can be carried out in a solution state, for example, in water or under the condition of adding a small amount of water or wetting.

[0053] In the related art, the rough grinding is usually done by hand, and the force on the cross section of the sintered ore on the water-abrasive sandpaper is uneven locally, which easily leads to uneven polishing surface. In addition, the pressure is difficult to control for a long time, and deep scratches that are difficult to remove are likely to appear. Such scratches will eventually affect the actual observation effect under the microscope, thereby increasing the rework time.

[0054] Exemplarily, a Buehler EcoMet30 semi-automatic grinding and polishing machine can be used for rough grinding. Rough grinding includes a rough grinding head and a rough grinding power head. Set the rotation direction of the rough grinding head and the rotation direction of the rough grinding power head, select suitable sandpaper, such as P180 sandpaper, and perform multiple rough grinding with the first rough grinding parameter. Exemplarily, first use P180 grit sandpaper and then replace P400 sandpaper for further grinding, set the 30mm pressure value to 25N, the rotation direction of the rough grinding power head and the rough grinding head is opposite and the speed is unchanged, add water lubrication and grind for 15 minutes.

[0055] In this step, the end point of rough grinding is that the flatness and smoothness of the cross section of the sintered ore meet the first preset condition. It means that after rough grinding, the flatness of the cross section of the sintered ore should be basically flat when observed with the naked eye. For example, the surface height difference after rough grinding is preferably controlled within 5μm, such as 1μm, 3μm, etc. This ensures that the abrasive can act evenly on the surface during polishing, avoiding local over-polishing or under-polishing. In addition, there should be no obvious holes, looseness and other defects on the surface after rough grinding, because these defects will cause uneven polishing during the polishing process.

[0056] The cross section of the sintered ore after rough grinding should have a certain degree of smoothness, and the depth and width of the surface scratches should be relatively small. The scratch depth should be shallower than the range that can be removed by the subsequent polishing abrasive. Usually, the scratch depth is less than 10-15μm, which is more appropriate. The width of the surface scratch should not be too wide, for example, less than 2μm, and further, less than 1μm, which is conducive to improving the efficiency and quality of subsequent polishing.

[0057] Figure 3 A schematic flow chart of a rough grinding process according to an embodiment of the present application is shown.

[0058] See also Figure 3 In S200, the cross section of the sintered ore is subjected to multiple rough grinding with the first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore meet the first preset condition, including: S210, performing a first rough grinding on the sintered ore cross section using a first rough grinding parameter; S220, performing a second rough grinding on the cross section of the sintered ore with the first rough grinding parameters until the flatness and smoothness of the cross section of the sintered ore meet the first preset conditions; the first scratch direction in the first rough grinding and the second scratch direction in the second rough grinding intersect.

[0059] According to the embodiment of the present application, the first scratch direction and the second scratch direction intersect, which is beneficial to eliminate or reduce the scratches in the first rough grinding and improve the surface quality of the cross section of the sintered ore after rough grinding.

[0060] The direction of the second rough grinding marks is different from that of the first rough grinding marks, so you can visually observe whether there are any residual grinding marks in the previous direction; if there are residual grinding marks, it means that you need to continue grinding with the current sandpaper size until all the marks are removed. If there are no residual grinding marks, it can be confirmed that the grinding is uniform and thorough, and then proceed to the next stage.

[0061] In addition, the first scratch direction and the second scratch direction intersect, so that the rough grinding direction is gradually rotated to prevent excessive grinding in one direction from causing surface deformation or uneven grinding.

[0062] In some optional embodiments, S210, the first scratch direction in the first rough grinding and the second scratch direction in the second rough grinding are 90 degrees. The first scratch direction and the second scratch direction are perpendicular, which can further eliminate or reduce the depth and width of the scratches in the first rough grinding on the basis of taking into account the rough grinding efficiency, improve the surface quality of the cross section of the sintered ore after rough grinding, and obtain a sintered ore sample with good cross-sectional surface quality.

[0063] In addition, the first scratch direction is perpendicular to the second scratch direction, which can ensure that the entire sample cross-section surface is evenly ground to avoid over-grinding or under-grinding of a certain part.

[0064] In some optional embodiments, in S200, the sintered ore cross section is subjected to multiple rough grinding with the first rough grinding parameter until the flatness and smoothness of the sintered ore cross section meet the first preset condition, including: S230, performing a third rough grinding on the cross section of the sintered ore using a first sandpaper with a first rough grinding parameter for multiple times until the grinding marks disappear in the first field of view; S240, performing a fourth rough grinding on the cross section of the sintered ore using a second sandpaper with a first rough grinding parameter for a plurality of times until the grinding marks disappear in a second field of view; S250, coarse-grinding the cross section of the sintered ore with a first coarse-grinding parameter until the flatness and smoothness of the cross section of the sintered ore meet a first preset condition; wherein the mesh number of the second sandpaper is greater than the mesh number of the first sandpaper or the particle size of the first particles in the first sandpaper is greater than the particle size of the second particles in the second sandpaper.

[0065] For example, waterproof sandpapers of No. 400, 800, 1000, 1500, and 2000 can be used, starting from the coarse sandpaper and grinding steadily step by step until the grinding is completed on the 2000-grit sandpaper, when the sample has a high flatness or bright cross-section. Among the waterproof sandpapers of No. 400, 800, 1000, 1500, and 2000, as the serial number of the waterproof sandpaper increases, the particle size of the sand in the waterproof sandpaper is smaller, the scratches left in the cross section of the sintered ore are smaller, and the less likely it is to affect the subsequent observation of the microstructure of the sintered ore through the cross section of the sintered ore. It is also beneficial to the flatness of the sintered ore.

[0066] During the fourth rough grinding, the wear marks in this direction completely covered and removed the wear marks during the third rough grinding, indicating that the deeper wear marks and surface defects have been smoothed out and can proceed to the next step of finer grinding. If the old wear marks are not completely removed, these deep wear marks may not be completely removed in the subsequent polishing stage, affecting the final surface quality of the sintered ore section in the sample and reducing the qualified rate of sample preparation.

[0067] The mesh number of the second sandpaper is larger than that of the first sandpaper or the particle size of the first particles in the first sandpaper is larger than the particle size of the second particles in the second sandpaper. The coarsely ground particles become finer, the ability to wear the surface is weakened, and the wear marks are shallower and finer; the surface of the sample can be gradually smoothed.

[0068] Gradually increasing the sandpaper number can avoid the deep wear marks that cannot be removed due to switching directly from coarse sandpaper to fine sandpaper, reduce material loss on the sample surface, protect the microstructure, and improve the qualified rate of the sintered surface section.

[0069] In addition, the mesh number of the second sandpaper is greater than the mesh number of the first sandpaper or the particle size of the first particles in the first sandpaper is greater than the particle size of the second particles in the second sandpaper. This rough grinding method can prevent surface deformation or eccentric wear caused by excessive grinding of any level of sandpaper, and can also improve the flatness and smoothness of the cross-section.

[0070] In some optional embodiments, S200, the rough grinding includes: the rough grinding grinding head rotates in a clockwise direction and the rough grinding power head rotates in a counterclockwise direction.

[0071] It can be understood that in the rough grinding process, the rough grinding includes a rough grinding grinding head and a power head, and the power head and the rough grinding grinding head are connected to enable the rough grinding grinding head to rotate.

[0072] The rough grinding head rotates clockwise and the rough grinding power head rotates counterclockwise. This setting can effectively and quickly remove the initial rough layer on the sample surface, such as cutting marks or surface defects, and form a uniform grinding mark.

[0073] S300, polishing the sintered ore section in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the sintered ore section reach the second preset condition, wherein the hardness of the polishing cloth in the three-stage polishing gradually decreases and the average particle size of the particles in the polishing liquid gradually decreases.

[0074] Generally speaking, during the polishing stage, the sintered ore section can be polished by spraying diamond polishing paste and water and lightly pressing it on the polishing cloth. You can also choose to wet the polishing cloth with a suspension for polishing.

[0075] The wear marks reaching the second preset condition can be understood as the wear marks cannot be observed under a microscope field of view of 200 times. The mirror surface parameters may include one or more of surface roughness, glossiness and reflectivity.

[0076] The surface roughness of the cross section of the sintered ore can reach about 1-10nm; the glossiness of the cross section of the sintered ore, such as the glossiness of the finely polished ore sample for optical observation, may reach about 100-500GU, indicating that its surface has good light reflection performance and is bright; the reflectivity of the cross section of the sintered ore, such as the reflectivity reaching about 30%-70%, the specific value depends on factors such as the composition of the ore sample (such as whether it contains metal minerals, etc.) and surface flatness.

[0077] According to the embodiment of the present application, the hardness of the polishing cloth in the three-stage polishing gradually decreases and the average particle size of the particles in the polishing liquid gradually decreases; the gradual decrease in the hardness of the polishing cloth is beneficial to reducing the depth of the scratches, and the gradual decrease in the average particle size of the particles in the polishing liquid can gradually reduce the width of the scratches, which is beneficial to polishing the sintered ore section until all the wear marks on the surface disappear and a bright mirror surface appears on the basis of taking into account the polishing efficiency, thereby improving the surface quality of the sintered ore section.

[0078] In some optional embodiments, S300, the three-stage polishing includes the polishing grinding head rotating in a first direction and the polishing power head rotating in the first direction.

[0079] The polishing head and the polishing power rotate in the same direction, which helps to reduce scratches and obtain a more uniform surface effect. If the reverse rotation is adopted, it will enhance the cutting effect and increase the material removal rate, but the surface quality may be poor, affecting the qualified rate of the sintered surface section.

[0080] After the rough grinding is completed, the rough ground sintered ore section can be pre-treated and the section can be cleaned. The fixture can also be cleaned and the sintered ore section can be fixed.

[0081] In some optional embodiments, S300, the three-stage polishing sequentially includes: First polishing: polishing with a VerduTex polishing cloth moistened with a diamond suspension having an average particle size of 3 microns; the polishing cloth is placed on the surface of the polishing grinding head; Second polishing: polishing with a Microcloth polishing cloth moistened with an aluminum oxide suspension having an average particle size of 0.05 microns; Third polishing: polishing is performed using a Chemomet polishing cloth moistened with an aluminum oxide suspension having an average particle size of 0.05 μm.

[0082] According to the embodiment of the present application, polishing in the above manner can further improve the mirror parameters of the sintered surface cross section, improve the surface quality of the cross section, and facilitate observation of the microstructure in the cross section.

[0083] In some optional embodiments, S300, the first polishing parameter includes polishing pressure, polishing power head rotation speed and polishing grinding head rotation speed; In some optional embodiments, before S300, before polishing the sintered ore cross section in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the sintered ore cross section reach the second preset conditions, the method further includes: According to the type of sintered ore, the tensile strength range and the historical polishing data, the preset range of polishing pressure, the preset range of polishing power head speed and the preset range of polishing grinding head speed are obtained; According to the preset range of polishing pressure, the preset range of polishing power head speed and the preset range of polishing grinding head speed, the parameters corresponding to the wear marks and mirror parameters of the sintered ore cross section that meet the second preset condition are screened to obtain the preset value of polishing pressure, the preset value of polishing power head speed and the preset value of polishing grinding head speed.

[0084] The historical polishing data is constructed based on the correspondence between the sinter ore cross section, mineral type, tensile strength range and the corresponding polishing operation parameters in the historical data.

[0085] In the historical polishing data, according to the preset range of polishing pressure, the preset range of polishing power head speed and the preset range of polishing grinding head speed, the wear marks and mirror parameters of the sintered ore cross section can be screened and corrected when they reach the parameters corresponding to the second preset conditions, and the appropriate first polishing parameters can be selected to realize automatic polishing, which is beneficial to improve the quality of rough grinding.

[0086] In combination with the above embodiments, the method for preparing a sintered ore sample provided in the embodiments of the present application has the following advantages: 1. It can accurately control the rough grinding and polishing process, solve the problem of high rework rate and failure rate of sintered ore cross-section obtained by rough grinding and polishing, reduce unnecessary waste of time, and increase experimental operability.

[0087] 2. For sintered ores with large or irregular cross-sections, rough grinding and polishing can be performed on sintered ores with different defects to eliminate microcracks or collapse of the cross-section of the sintered ores caused by defects in the properties of the sintered ores themselves, thereby greatly improving the sample preparation qualification rate of the sintered ores cross-section.

[0088] 3. It can reduce the instability of rough grinding and polishing parameters caused by manual sample preparation, improve the stability and reliability of the cross-section quality of sintered ore, and improve the sample preparation efficiency.

[0089] Figure 4 A cross-sectional view of a sintered ore sample of the present application is shown. Figure 5 A cross-sectional view of a sintered ore sample in another embodiment of the present application is shown. Figure 4 and Figure 5 This is the mineral structure diagram of the cross section of the sintered ore sample observed under a microscope at 200 times magnification after polishing. Figure 4 and Figure 5It can be seen that in sintered ore, Figure 4 Adopt the existing manual and machine combined sample preparation mode, Figure 4 It is obvious that many deep and fine scratches are engraved on the surface of the sintered ore, which may produce reflection, scattering or local optical deformation under the microscope, affecting the clarity and contrast of the mineral phase, while covering up the mineral phase texture and interfering with the mineral morphology analysis and classification. Figure 5 It can be clearly seen that the main structures are needle-column, plate-like and melt-like structures. The fussite is cemented with calcium ferrite and a small amount of plate-like silicate, and contains a small amount of hematite. This shows that the calcium ferrite in the sintered ore has good morphology and abundant quantity, and the sintered ore has high drum strength, which is conducive to blast furnace smelting.

[0090] Figure 6 A schematic diagram of the structure of a sample preparation device for sintered ore provided in an embodiment of the present application.

[0091] Next, the sample preparation device for sintered ore provided in the embodiment of the present application is introduced. Figure 6 As shown, the sample preparation device for sintered ore includes: A determination module 601 is used to determine first rough grinding parameters according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength, wherein the first rough grinding parameters include the contact diameter and pressure of the rough grinding head, the speed of the rough grinding power head and the speed of the rough grinding head; A rough grinding module 602 is used to perform rough grinding on the cross section of the sintered ore for multiple times with a first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore meet a first preset condition, wherein the first rough grinding parameter includes a contact diameter and pressure of a grinding head, a rotation speed of a power head, and a rotation speed of a rough grinding grinding head; The polishing module 603 is used to polish the sintered ore section in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the sintered ore section reach the second preset conditions, and the hardness of the polishing cloth in the three-stage polishing gradually decreases and the average particle size of the particles in the polishing liquid gradually decreases.

[0092] Figure 7 A schematic diagram of the structure of a sintered ore sample preparation device provided in an embodiment of the present application; The friction welding device may include a processor 701 and a memory 702 storing computer program instructions.

[0093] Specifically, the processor 701 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0094] The memory 702 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 702 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 702 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 702 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 702 is a non-volatile solid-state memory.

[0095] The memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to the first aspect of the present disclosure.

[0096] The processor 701 reads and executes the computer program instructions stored in the memory 702 to implement the method for preparing samples of sintered ore in the above embodiment.

[0097] In one example, the sintered ore sample preparation device may further include a communication interface 703 and a bus 710. Figure 7 As shown, the processor 701, the memory 702, and the communication interface 703 are connected via a bus 710 and communicate with each other.

[0098] The communication interface 703 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0099] The bus 710 includes hardware, software or both, coupling the components of the friction welding device to each other. For example and not limitation, the bus may include an accelerated graphics port (AGP) or other graphics bus, an enhanced industrial standard architecture (EISA) bus, a front-side bus (FSB), a hypertransport (HT) interconnect, an industrial standard architecture (ISA) bus, an infinite bandwidth interconnect, a low pin count (LPC) bus, a memory bus, a microchannel architecture (MCA) bus, a peripheral component interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a serial advanced technology attachment (SATA) bus, a video electronics standard association local (VLB) bus or other suitable bus or a combination of two or more of these. Where appropriate, the bus 710 may include one or more buses. Although the present application embodiment describes and illustrates a specific bus, the present application considers any suitable bus or interconnect.

[0100] The sintered ore sampling device executes the sintered ore sampling method in the embodiment of the present application, thereby realizing the sintered ore sampling method of the first aspect.

[0101] In addition, in combination with the method for preparing a sintered ore sample in the above embodiment, the embodiment of the present application may provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any one of the methods for preparing a sintered ore sample in the above embodiment is implemented.

[0102] In combination with the method for preparing samples of sintered ore in the above-mentioned embodiments, an embodiment of the present application further provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the method for preparing samples of sintered ore in any of the above-mentioned embodiments.

[0103] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0104] The functional blocks shown in the above structural block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0105] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0106] Aspects of the present disclosure are described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0107] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for preparing a sample of a sintered ore, characterized in that: include: Determine the first coarse grinding parameters according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength; The sintered ore cross section is subjected to multiple rough grinding with first rough grinding parameters until the flatness and smoothness of the sintered ore cross section meet first preset conditions, wherein the first rough grinding parameters include the contact diameter and pressure of the rough grinding head, the speed of the rough grinding power head, and the speed of the rough grinding head; The sintered ore section is polished in at least three stages with a first polishing parameter until the wear marks and mirror parameters of the sintered ore section reach a second preset condition, wherein the hardness of the polishing cloth in the three-stage polishing gradually decreases and the average particle size of particles in the polishing liquid gradually decreases.

2. The method according to claim 1, characterized in that: The first coarse grinding parameter is determined according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength, including: According to the type of the sintered ore, obtaining the type of minerals in the sintered ore; According to the cross section of the sintered ore, the type of the mineral and the range of tensile strength, a preset value of the contact diameter, a preset value of the pressure, a preset value of the rotation speed of the power head and a preset value of the rotation speed of the rough grinding head are obtained; The first rough grinding parameter is determined according to the preset value of the contact diameter, the preset value of the pressure, the preset value of the rotation speed of the power head and the preset value of the rotation speed of the rough grinding grinding head.

3. The method according to claim 2, characterized in that The step of obtaining the preset value of the contact diameter, the preset value of the pressure, the preset value of the rotation speed of the power head and the preset value of the rotation speed of the rough grinding head according to the cross section of the sintered ore, the type of the mineral and the range of the tensile strength comprises: According to the cross section of the sintered ore, the type of the mineral, the tensile strength range and the historical rough grinding data, the preset range of the contact diameter, the preset range of the pressure, the preset range of the power head speed and the preset range of the rough grinding head speed are obtained; According to the preset range of the contact diameter, the preset range of the pressure, the preset range of the power head speed and the preset range of the rough grinding head speed, screening is performed among the parameters corresponding to the first preset condition in which the flatness and smoothness of the sintered ore cross section meet, to obtain the preset value of the pressure, the preset value of the power head speed and the preset value of the rough grinding head speed.

4. The method according to claim 3, characterized in that: The step of performing multiple rough grinding of the cross section of the sintered ore with the first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore reach the first preset condition comprises: Performing a first rough grinding on the sintered ore cross section using a first rough grinding parameter; The sintered ore cross section is subjected to second rough grinding with first rough grinding parameters until the flatness and smoothness of the sintered ore cross section meet first preset conditions; the first scratch direction in the first rough grinding intersects with the second scratch direction in the second rough grinding.

5. The method according to claim 4, characterized in that The first scratch direction in the first rough grinding and the second scratch direction in the second rough grinding are 90 degrees.

6. The method according to any one of claims 1 to 5, characterized in that The step of performing multiple rough grinding of the cross section of the sintered ore with the first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore reach the first preset condition comprises: The cross section of the sintered ore is subjected to a third rough grinding with a first sandpaper and a first rough grinding parameter for a plurality of times until the grinding marks disappear in a first field of view; The cross section of the sintered ore is subjected to a fourth rough grinding with a second sandpaper and a first rough grinding parameter for multiple times until the grinding marks disappear in a second field of view; wherein the mesh number of the second sandpaper is greater than the mesh number of the first sandpaper or the particle size of the first particles in the first sandpaper is greater than the particle size of the second particles in the second sandpaper; The sintered ore cross section is coarsely ground with a first coarse grinding parameter until the flatness and smoothness of the sintered ore cross section meet a first preset condition.

7. The method according to any one of claims 1 to 5, characterized in that The method comprises one or more of the following conditions: (1) The rough grinding includes: the rough grinding head rotates clockwise and the rough grinding power head rotates counterclockwise; (2) The three-stage polishing includes the polishing grinding head rotating in a first direction and the polishing power head rotating in the first direction.

8. The method according to claim 1, characterized in that The three-stage polishing includes: First polishing: polishing with a VerduTex polishing cloth moistened with a diamond suspension having an average particle size of 3 microns; the polishing cloth is placed on the surface of the polishing grinding head; Second polishing: polishing with a Microcloth polishing cloth moistened with an aluminum oxide suspension having an average particle size of 0.05 microns; Third polishing: Polishing is performed with a Chemomet polishing cloth moistened with an aluminum oxide suspension having an average particle size of 0.05 μm.

9. The method according to claim 1, characterized in that: The first polishing parameters include polishing pressure, polishing power head speed and polishing grinding head speed; The method further comprises: polishing the sintered ore cross section in at least three stages with the first polishing parameter until the wear marks and mirror parameters of the sintered ore cross section reach the second preset conditions: According to the type of the sintered ore, the tensile strength range and the historical polishing data, a preset range of the polishing pressure, a preset range of the polishing power head rotation speed and a preset range of the polishing grinding head rotation speed are obtained; According to the preset range of the polishing pressure, the preset range of the polishing power head rotation speed and the preset range of the polishing grinding head rotation speed, screening is performed among the parameters corresponding to the second preset conditions when the wear marks and mirror parameters of the sintered ore cross section meet, to obtain the preset values ​​of the polishing pressure, the preset values ​​of the polishing power head rotation speed and the preset values ​​of the polishing grinding head rotation speed.

10. A sample preparation device for sintered ore, characterized in that: include: A determination module, used to determine the first coarse grinding parameters according to the cross section of the sintered ore, the type of the sintered ore and the range of tensile strength; A rough grinding module, used for rough grinding the cross section of the sintered ore for multiple times with a first rough grinding parameter until the flatness and smoothness of the cross section of the sintered ore reach a first preset condition, wherein the first rough grinding parameter includes a contact diameter and pressure of a grinding head, a rotation speed of a power head, and a rotation speed of a rough grinding grinding head; The polishing module is used to polish the sintered ore section in at least three stages with a first polishing parameter until the wear marks and mirror parameters of the sintered ore section reach a second preset condition, and the hardness of the polishing cloth in the three-stage polishing gradually decreases and the average particle size of the particles in the polishing liquid gradually decreases.

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