Melting centrifugal type mineral particle morphology remodeling device and lunar soil glass ball preparation method

Abstract

The invention relates to the technical field of space exploration and lunar soil experiments, in particular to a melting centrifugal type mineral particle morphology remodeling device and a lunar soil glass ball preparation method. The device comprises a mineral protolith high-temperature melting system, a mineral melting slurry conveying system, a centrifugal mineral particle size control system and a mineral particle cooling and morphology remodeling system. The preparation method of the lunar soil glass ball comprises the following steps: adding basalt mineral powder and mineral melting additive powder into a melting centrifugal mineral particle morphology remodeling device to obtain simulated lunar soil glass balls with different particle sizes, and performing morphology transformation on the simulated lunar soil glass balls with different particle sizes by using an ion beam gun. And the lunar soil glass ball state of the impact melting history is reduced. According to the method, high-precision engineering mass production of components, morphology and mechanical properties of the lunar soil glass balls is realized through a fusion centrifugal forming and ion beam surface control composite process, and the problem of soil mechanical behavior deviation caused by morphology distortion of existing simulated lunar soil is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of space exploration and lunar soil experiment, and particularly relates to a molten centrifugal mineral particle morphology remodeling device and a lunar soil glass ball preparation method. BACKGROUND

[0002] With the development of space technology in recent years, the value of lunar exploration in economy, military and scientific research is increasingly prominent. In the process of promoting lunar exploration, it is necessary to understand the physical and mechanical properties of lunar soil.

[0003] Through a large number of previous studies, it has been found that there is a part of mineral glass balls in lunar soil, which can account for about 20% or so in lunar soil. The surface morphology of the mineral glass balls determines their mechanical properties, especially the shear mechanical behavior, which has a significant impact. The lunar soil glass ball is formed by high-temperature molten lunar soil after rapid cooling, and its surface has high roundness and smoothness, which makes the lunar soil glass ball have strong rolling ability, reduces the friction between particles, and thus affects the shear strength and flowability of lunar soil. The shear mechanical properties of lunar soil are crucial for lunar base construction and resource development when engineering operations are carried out on the lunar surface. Therefore, adding lunar soil glass ball components to the simulated lunar soil can better reproduce the flowability and stability of lunar soil when simulating the lunar environment, and more accurately simulate and reproduce the soil mechanical behavior of lunar soil.

[0004] The existing lunar soil glass ball manufacturing equipment and method have the shortcomings of being unable to accurately control the morphology and chemical composition of the lunar soil glass ball, which easily leads to the prepared lunar soil glass ball being unable to be smoothly applied in the engineering construction process. Although the Chinese patent "Iron-rich glass ball-shaped simulated lunar soil and its preparation method" (CN114890771B) solves the problem of insufficient magnetic properties and adhesion of the existing simulated lunar soil, it ignores the restoration of the lunar soil particle morphology and mechanical behavior in the process, and is mainly suitable for the interaction between the lunar explorer and the lunar soil, but cannot restore the soil mechanical properties of the simulated lunar soil required in the construction process. In addition, the production capacity of this manufacturing method is limited, and it cannot mass-produce a large number of glass ball samples required in engineering. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a molten centrifugal mineral particle morphology remodeling device and a lunar soil glass ball preparation method. Through the molten centrifugal forming and ion beam surface control composite process, the composition, morphology and mechanical properties of the lunar soil glass ball can be accurately simulated, the soil mechanical behavior deviation problem caused by the morphology distortion of the existing simulated lunar soil is solved, and high-precision engineering mass production can be realized to meet the test requirements of large-scale engineering projects in lunar construction.

[0006] To solve the above technical problems, the technical solution adopted by the present application is as follows: I. Molten centrifugal mineral particle morphology remodeling device The present invention provides a melting centrifugal mineral particle morphology reshaping device, which mainly includes: a mineral original rock high temperature melting system 11, a mineral melting slurry transmission system 12, a centrifugal mineral particle size control system 13, and a mineral particle cooling and morphology reshaping system 14. The mineral raw rock high-temperature melting system 11 includes a melting chamber 112 for sintering mineral powder. The inlet of the melting chamber 112 is provided with a feeding conveyor belt 111. The inner liner of the melting chamber 112 is coated with a platinum high-temperature resistant layer and is provided with a stirring blade 113 inside. The bottom of the melting chamber 112 is provided with a liquid outlet 114. The mineral molten slurry transmission system 12 includes a funnel-shaped storage chamber 121 that is sealed and connected to the outlet 114. The funnel-shaped storage chamber 121 is connected to a pressure tank 123, and a precision metering pump 124 is provided at the bottom of the funnel-shaped storage chamber 121. The output end of the metering pump 124 is connected to a special nozzle 125 through a long transmission pipe 122 lined with alumina ceramic. The centrifugal mineral particle size control system 13 includes a precision thermal control turntable 131 located directly below the nozzle 125. A high-precision servo frequency converter motor 132 is connected to the bottom of the thermal control turntable 131. A heater is provided on the upper surface of the thermal control turntable 131, and a high-speed image recognition camera 133 is installed above the thermal control turntable 131. The servo frequency converter motor 132, heater, image recognition camera 133, melting chamber 112, stirring vane 113, pressure tank 123, and metering pump 124 are all electrically connected to the control center 134. The mineral particle cooling and morphology reshaping system 14 includes a high and low temperature cooling chamber 141 and an ion beam gun 142 disposed on its right side. The mineral particles centrifugally formed on the thermal control turntable 131 enter the cooling chamber 141 under the action of centrifugal force and are rapidly cooled before being morphologically modified by the ion beam gun 142.

[0007] Preferably, the feeding track 111 is a detachable structure, and multiple ceramic inserts are embedded on the upper surface of the feeding track 111; the inner liner of the melting chamber 112 is arc-shaped and its size is adapted to the diameter of the stirring blade 113; the stirring blade 113 is provided with a spiral scraper made of high-temperature resistant alloy material, and the outer surface of the stirring blade 113 is mirror polished.

[0008] Preferably, the inner wall of the funnel-shaped storage chamber 121 is laser-polished and the bottom cone angle is not less than 70°; the outer wall of the funnel-shaped storage chamber 121 is provided with a heat insulation layer with a thickness greater than 15cm; the pump body material of the metering pump 124 is zirconium oxide, the nozzle 125 is made of platinum and the inner surface is mirror-polished; the pressure tank 123 is filled with inert gas, and its working pressure range is 0.1~0.5MPa, and the inner volume V of the pressure tank 123 is...罐 >5×V 管 V 管 The volume of transmission pipe 122.

[0009] Preferably, the image recognition camera 133 is used to monitor the particle size and roundness of the mineral particles on the thermal control turntable 131 in real time and transmit the data to the control center 134; the control center 134 controls the parameters of the servo frequency conversion motor 132, heater, melting chamber 112, stirring vane 113, pressure tank 123 and metering pump 124 to regulate the particle size and roundness of the formed mineral particles.

[0010] Preferably, the temperature control range of the cooling chamber 141 is -190℃ to 130℃ to simulate and restore the temperature environment of the lunar surface; the ion beam gun 142 uses argon ions and the ion beam inrush angle can be controlled from 0 to 60°; the beam energy of the ion beam gun 142 is 1 to 30 keV, of which 1 to 5 keV is used for low-energy surface light etching and 5 to 30 keV is used for high-energy deep sputtering injection modification; a vacuum pumping device is provided in the chamber where the ion beam gun 142 is located.

[0011] II. Preparation Method of Lunar Soil Glass Spheres Based on the same inventive concept, this invention also provides a method for preparing lunar regolith glass spheres, which, based on the melting centrifugal mineral particle morphology reshaping device described above, specifically includes the following steps: Step S1: Based on the material composition of lunar regolith glass spheres in the lunar regolith sample, the history of thermal melting reaction, and the reduction environment caused by impacts from extraterrestrial objects, select the corresponding Cenozoic low-silica basalt as the main raw material. Step S2: After cutting, crushing, ball milling and grinding the main raw material of Cenozoic low-silica basalt, basalt mineral powder M1 is obtained. Step S3: Mix one part of basalt mineral powder M1 with two parts of mineral melting additive powder M2 to obtain a mixture. Step S4: After the mixture is sintered and melted in the melting chamber, the slurry is transported to the thermal control turntable by the metering pump and centrifuged to form lunar soil glass spheres of different particle sizes. In step S5, the centrifuged lunar regolith glass spheres are sent into a cooling chamber for rapid cooling, and the morphology of lunar regolith glass spheres of different particle sizes is modified by an ion beam gun to simulate the impact melting process of real lunar regolith, thus forming lunar regolith glass spheres with simulated impact melting history.

[0012] Preferably, in step S2, the method for preparing the basalt mineral powder M1 includes: First, the weathered surface of the low-silica basalt raw material collected in the field is cut off by a wire cutting machine to expose the fresh surface. Then, it is put into a jaw crusher for crushing. After crushing, it is poured into a planetary ball mill or a drum ball mill for ball milling. Then, it is sorted by a nano-resolution optical microscope to classify and collect the mineral particles according to the preset categories. Finally, it is ultra-finely ground by an air jet mill to obtain the basalt mineral powder M1.

[0013] Preferably, in step S3, the raw minerals for the mineral melting additive powder M2 are selected based on the color and mineral composition of the lunar regolith glass spheres to be obtained; when the lunar regolith glass spheres to be obtained are red, hematite and graphite powder are selected as raw minerals, and when the lunar regolith glass spheres to be obtained are black, ilmenite is selected as raw mineral; the raw minerals are screened and then ultra-finely ground in an air jet mill to obtain the mineral melting additive powder M2.

[0014] Preferably, in step S4, during the centrifugal molding of the lunar regolith glass spheres, the particle size and roundness of the mineral particles on the thermal control turntable are monitored in real time by an image recognition camera and transmitted to the control center. The control center controls the sintering temperature of the melting chamber, the stirring speed of the stirring blade, the working pressure of the pressure tank, the mineral slurry transmission rate of the metering pump, and the rotation speed and surface temperature of the thermal control turntable to ensure that the particle size of the molded lunar regolith glass spheres is within a preset range and that the roundness of the molded lunar regolith glass spheres is >0.95.

[0015] Preferably, in step S5, the morphological modification of lunar regolith glass spheres of different particle sizes using an ion beam gun includes: Based on the history of thermal melting reaction and the reduction environment of extraterrestrial impact on lunar soil glass spheres in lunar soil samples, the morphological modification stages of ion beam bombardment are divided. The morphology modification stage includes a low-energy surface light etching stage with a beam energy of 1~30keV and a high-energy deep sputtering injection modification stage with a beam energy of 5~30keV.

[0016] Compared with the prior art, the present invention has the following main advantages: 1) Achieving high-precision morphology and particle size control of lunar soil glass spheres By combining a centrifugal mineral particle size control system with a specially designed nozzle, the centrifugal dispersion size of the molten droplets is precisely controlled. Combined with precise feeding from a metering pump and pressure tank, the glass sphere particle size error is kept ≤5%. A high-speed camera monitors the droplet morphology on the rotating disk in real time, providing feedback to adjust the rotation speed and temperature, ensuring a particle roundness >0.95 (close to the characteristics of real lunar soil glass spheres). This solves the problem of distorted mechanical behavior caused by inaccurate control of simulated lunar soil morphology in traditional methods.

[0017] 2) Highly replicates the mechanical properties of lunar soil glass spheres Based on the compositional analysis of real lunar soil samples, this study uses Cenozoic low-silica basalt as the main raw material and adds specific mineral melting additives. The platinum coating of the melting chamber and the eccentric stirring blades ensure the uniformity of the melt composition. The surface smoothness of the generated glass spheres is consistent with that of real lunar soil glass spheres, which significantly reduces the friction coefficient between particles and accurately reproduces the shear strength and flowability characteristics of lunar soil, providing reliable soil mechanics simulation materials for lunar base engineering.

[0018] 3) Overcome the bottleneck of mass production and improve engineering applicability The device adopts a modular design: continuous feeding via a feed conveyor → melting chamber → transfer system → centrifugal molding, with a single processing capacity of up to kilograms, and an efficiency more than 10 times that of traditional methods. Combined with pretreatment of raw materials by ultrafine grinding in an air jet mill (particle size D50 < 10 μm), it can stably produce standardized glass spheres with controllable chemical composition (±1% deviation) and adjustable particle size range (1~50000 μm), meeting the experimental needs of large-scale engineering projects for lunar construction.

[0019] 4) Recreate the lunar impact environment using ion beam morphology modification technology. By bombarding the surface of nascent glass spheres with an ion beam gun at the bottom of the high-low temperature cooling chamber, the process of micro-meteorite impact melting-rapid cooling is simulated, generating characteristic morphologies such as micro-pits and melt flow lines on the particle surface (with similarity to real samples >90%). This solves the problem of existing technologies ignoring the influence of impact history on particle surface structure, enabling simulated lunar soil to exhibit more realistic particle interlocking and rolling behavior in shear tests, and significantly improving the accuracy and reference value of experimental data. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the molten centrifugal mineral particle morphology reshaping device in an embodiment of the present invention; Figure 2 This is a flowchart of the method for preparing lunar soil glass spheres in an embodiment of the present invention.

[0021] In the diagram: 11-High-temperature melting system for original mineral rock; 111-Feed conveyor belt; 112-Melting chamber; 113-Stirring blade; 114-Outlet; 12-Mineral molten slurry transfer system; 121-Funnel-shaped storage chamber; 122-Transfer pipeline; 123-Pressure tank; 124-Metering pump; 125-Nozzle; 13-Centrifugal mineral particle size control system; 131-Thermal control turntable; 132-Servo frequency converter motor; 133-Image recognition camera; 134-Control center; 14-Mineral particle cooling and morphology reshaping system; 141-Cooling chamber; 142-Ion beam gun. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0024] Example 1: This example provides a molten centrifugal mineral particle morphology reshaping device, such as... Figure 1 As shown, it mainly includes: a high-temperature melting system for original mineral rock 11, a mineral melting slurry transport system 12, a centrifugal mineral particle size control system 13, and a mineral particle cooling and morphology reshaping system 14; The mineral raw rock high-temperature melting system 11 includes a melting chamber 112 for sintering mineral powder. The inlet of the melting chamber 112 is provided with a feeding conveyor belt 111. The inner liner of the melting chamber 112 is coated with a platinum high-temperature resistant layer and is provided with a stirring blade 113 inside. The bottom of the melting chamber 112 is provided with a liquid outlet 114. The mineral molten slurry transmission system 12 includes a funnel-shaped storage chamber 121 that is sealed and connected to the outlet 114. The funnel-shaped storage chamber 121 is connected to a pressure tank 123, and a precision metering pump 124 is provided at the bottom of the funnel-shaped storage chamber 121. The output end of the metering pump 124 is connected to a special nozzle 125 through a long transmission pipe 122 lined with alumina ceramic. The centrifugal mineral particle size control system 13 includes a precision thermal control turntable 131 located directly below the nozzle 125. A high-precision servo frequency conversion motor 132 is connected to the bottom of the thermal control turntable 131. A heater is provided on the upper surface of the thermal control turntable 131, and an image recognition camera 133 is installed above the thermal control turntable 131. The servo frequency conversion motor 132, heater, image recognition camera 133, melting chamber 112, stirring vane 113, pressure tank 123, and metering pump 124 are all electrically connected to the control center 134. The mineral particle cooling and morphology reshaping system 14 includes a high and low temperature cooling chamber 141 and an ion beam gun 142 disposed on its right side. The mineral particles centrifugally formed on the thermal control turntable 131 enter the cooling chamber 141 under the action of centrifugal force and are rapidly cooled before being morphologically modified by the ion beam gun 142.

[0025] Furthermore, the feeding track 111 is a detachable structure, and multiple ceramic inserts are embedded on the upper surface of the feeding track 111; the inner liner of the melting chamber 112 is arc-shaped and its size is adapted to the diameter of the stirring blade 113; the stirring blade 113 is provided with a spiral scraper made of high-temperature resistant alloy material, and the outer surface of the stirring blade 113 is mirror polished.

[0026] Furthermore, the inner wall of the funnel-shaped storage chamber 121 is laser-polished and the bottom cone angle is not less than 70°; the outer wall of the funnel-shaped storage chamber 121 is provided with a heat insulation layer with a thickness greater than 15cm; the pump body material of the metering pump 124 is zirconium oxide, the nozzle 125 is made of platinum and its inner surface is mirror-polished; the pressure tank 123 is filled with inert gas, its working pressure range is 0.1~0.5MPa, and the inner volume V of the pressure tank 123 is... 罐 >5×V 管 V 管 The volume of transmission pipe 122.

[0027] Furthermore, the image recognition camera 133 is used to monitor the particle size and roundness of the mineral particles on the thermal control turntable 131 in real time and transmit the data to the control center 134; the control center 134 controls the parameters of the servo frequency conversion motor 132, heater, melting chamber 112, stirring vane 113, pressure tank 123 and metering pump 124 to regulate the particle size and roundness of the formed mineral particles.

[0028] Furthermore, the temperature control range of the cooling chamber 141 is -190℃ to 130℃ to simulate and restore the temperature environment of the lunar surface; the ion beam gun 142 uses argon ions and the ion beam injection angle can be controlled from 0 to 60°, and the beam energy of the ion beam gun 142 is 1 to 30 keV, of which 1 to 5 keV is used for low-energy surface light etching and 5 to 30 keV is used for high-energy deep sputtering injection modification; a vacuum pumping device is provided in the chamber where the ion beam gun 142 is located.

[0029] Example 2: This example provides a centrifugal mineral particle morphology reshaping device. The high-temperature melting system 11 for the original mineral rock is equipped with a feeding conveyor belt 111, a melting chamber 112, a stirring vane 113, and a liquid outlet 114. The mineral melting slurry transmission system 12 consists of a funnel-shaped storage chamber 121 that is sealed and connected to the liquid outlet, a long transmission pipe 122 lined with alumina ceramic, a pressure tank 123, a precision metering pump 124, and a specially designed nozzle 125. The centrifugal mineral particle size control system 13 includes a precision thermal control turntable 131 located directly below the nozzle, a high-precision servo frequency conversion motor 132 that drives the turntable, a high-speed camera 133 that monitors the droplet morphology, and a control center 134. The mineral particle cooling and morphology reshaping system 14 consists of a high-low temperature cooling chamber 141 and an ion beam gun 142 arranged on its right side. The temperature range of the cooling chamber is -190℃ to 130℃, and the beam energy of the ion beam gun is 1 to 30 keV.

[0030] Furthermore, the feeding track 111 is detachable to ensure the thermal sealing of the melting system 11 after feeding.

[0031] Furthermore, the surface of the feed track 111 is covered with a rough material (with embedded ceramic inserts), which can provide directional friction and prevent the transmission force from decreasing due to insufficient friction after the mineral particles and powders are added, while maintaining a smooth surface.

[0032] Furthermore, the inner liner of the melting chamber 112 is designed in an arc shape to match the size of the scraper of the stirring blade 113, preventing the mineral slurry from sticking together inside the melting chamber 112.

[0033] Furthermore, the high-temperature resistant coating of the inner liner of the melting chamber 112 is a platinum coating, which increases the smoothness of the chamber wall while ensuring the thermal stability of the inner liner, and further prevents the mineral slurry from sticking together in the melting chamber.

[0034] Furthermore, the stirring blade 113 is equipped with a scraping spiral blade, which can scrape away the mineral slurry in the melting chamber 112 from all directions, increasing the service life of the chamber.

[0035] Furthermore, the stirring blade 113 is made of high-temperature resistant tungsten alloy or molybdenum alloy, which has excellent high-temperature resistance and high economic benefits.

[0036] Furthermore, all contact surfaces of the stirring blade 113 are high-precision mirror-polished, which can largely prevent the mineral slurry from sticking to the stirring blade.

[0037] Furthermore, the cone angle of the funnel-shaped storage tank 121 is not less than 70°, and the inner wall is laser-polished to enhance the fluidity of the mineral molten slurry in the funnel-shaped storage tank.

[0038] Furthermore, the outer wall of the funnel-shaped storage tank 121 is provided with a heat insulation layer of more than 15cm to prevent the internal molten slurry from rapidly cooling and losing its fluidity after cooling down.

[0039] Furthermore, the long transmission pipe 122 is lined with 99.5% alumina ceramic pipe and wrapped with a molybdenum alloy pressure-bearing layer. The inner wall is laser polished, which provides smooth high-temperature transport and pressure resistance.

[0040] Furthermore, the pressure vessel 123 is a high-purity inert gas vessel such as an argon or helium vessel, with a working pressure range of 0.1~0.5MPa. The inner liner volume is greater than 5 times the volume of the long transmission pipeline, ensuring that the mineral molten slurry does not react within the sample funnel-shaped storage chamber 121. This allows for control of the mineral slurry transmission rate and ensures the slurry volume range.

[0041] Furthermore, the metering pump 124 is a high-temperature plunger pump or screw pump, the pump body material is zirconium oxide, the flow rate range is 0.1~100 mL / min, the pulsation frequency is 1~1000 Hz, and the pressure control range is greater than 1MPa.

[0042] Furthermore, the nozzle 125 is made of platinum, with a chamfered outlet edge of less than 15°, a length / diameter ratio of 5 to 10, and a mirror-polished inner surface with a roughness of less than 0.1 μm.

[0043] Furthermore, the precision thermal control turntable 131 is made of high-temperature alloy or ceramic material, and the dial is equipped with a resistance / electromagnetic heater.

[0044] Furthermore, the high-precision servo motor 132 is connected to the precision thermal control turntable 131, with a speed range of 100~1500RPM.

[0045] Furthermore, the control center 134 is electrically connected to the servo motor 132, melting chamber 112, stirring vane 113, pressure tank 123, precision metering pump 124, and high-speed camera 133, playing a control and real-time monitoring role, and adjusting the particle size error to ≤5%.

[0046] Furthermore, the temperature control range of the high and low temperature cooling chamber 141 is between -190℃ and 130℃, which can simulate and restore the high and low temperature environment on the lunar surface.

[0047] Furthermore, the beam energy of the ion beam gun 142 is 1~30keV, of which 1~5keV is for low-energy surface light etching and 5~30keV is for high-energy deep sputtering implantation modification.

[0048] Furthermore, the ion beam gun 142 uses argon ions, which can reduce the chemical reaction between gas ions and glass bead particles.

[0049] Furthermore, the ion beam gun 142 can control the ion beam inrush angle to be 0~60°, which can be used to construct asymmetric morphologies.

[0050] Furthermore, the ion beam gun 142 evacuates the chamber during operation, achieving a vacuum level of less than 1×10⁻⁶. -3 Pa.

[0051] Example 3, based on the same inventive concept, also provides a method for preparing lunar soil glass spheres, based on the melting centrifugal mineral particle morphology reshaping device described above, such as... Figure 2 As shown, it includes the following steps: Step S1: Based on the mineral composition and formation history of the real lunar soil sample, select the corresponding Cenozoic low-silica volcanic basalt as the main raw material; The aforementioned Cenozoic low-silica volcanic basalts include Penglai basalt from Shandong, Changle basalt from Weifang, Shandong, Sanming basalt from Fujian, and Jiande basalt from Zhejiang. The preferred material is Changle basalt from Weifang, Shandong.

[0052] Step S2: After cutting, crushing, ball milling and grinding the Cenozoic low-silica basalt, basalt mineral powder (M1) is obtained.

[0053] Furthermore, the method for preparing the basalt mineral powder includes: Cenozoic low-silica basalt collected in the field is exposed by cutting away the weathered surface with a wire cutter, then crushed in a jaw crusher. After crushing, it is milled in a planetary ball mill or a drum ball mill. Subsequently, it is sorted using an intelligent nano-resolution optical microscope, classifying the mineral particles into plagioclase, pyroxene, olivine, ilmenite, apatite, amphibole, and multi-mineral aggregates. Finally, it is ultra-finely ground using an air jet mill to obtain basalt mineral powder. Preferably, the particle size of the basalt mineral powder obtained after ultra-fine grinding by the air jet mill is 500 mesh or larger.

[0054] Step S3: Based on the material composition of the lunar regolith glass spheres in the real lunar regolith sample, the history of thermal melting reaction, and the reduction environment caused by the impact of extraterrestrial objects, select the corresponding mineral melting additive powder (M2): The molten mineral additive includes one or more of the following: titanium dioxide reagent, iron oxide reagent, zircon reagent, zircon, magnetite, ilmenite, hematite, rutile, nano-elemental iron, nano-zero-valent iron, high-purity graphite powder, and aluminum powder. After screening, these are ultra-finely ground in an air jet mill to obtain the aforementioned mineral molten additive powder. The additive is selected based on the color and mineral composition of the lunar regolith glass spheres. For example, if the lunar regolith glass spheres are close to red, then the preferred minerals are hematite and graphite powder; if the lunar regolith glass spheres are close to black, then the preferred mineral is ilmenite.

[0055] Step S4: Add 1 to 20 parts by weight of one or more basalt mineral powder (M1) and 1 to 10 parts by weight of one or more mineral melting additive powder (M2) to the melting centrifugal mineral particle morphology reshaping device to obtain simulated lunar soil glass spheres of different particle sizes. The mixture of M1 and M2 is first melted in a melting chamber, and then the slurry is transported to a thermal control turntable by a metering pump. It is then centrifuged into glass spheres. During the centrifugation process, a high-speed camera provides real-time feedback on the roundness of the droplets to the control center, and the turntable speed is adjusted to ensure that the roundness of the particles is greater than 0.95. Step S5: The formed simulated lunar regolith glass spheres are sent into the cooling chamber for rapid cooling, and the morphology of lunar regolith glass spheres of different particle sizes is modified by the ion beam gun in the mineral particle cooling and morphology reshaping system to simulate and reproduce the impact melting process of the moon and restore the lunar regolith glass spheres with impact melting history.

[0056] The prepared lunar regolith glass spheres have a particle size of 1~50000μm, a chemical composition deviation of ±1%, and a surface morphology with micro-meteorite impact characteristics, with a similarity of >90% to real lunar regolith glass spheres.

[0057] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0058] In summary: This invention provides a molten centrifugal mineral particle morphology reshaping device and a method for preparing lunar soil glass spheres. Through a composite process of molten centrifugal molding and ion beam surface control, it can accurately simulate the composition, morphology and mechanical properties of lunar soil glass spheres. This solves the problem of soil mechanical behavior deviation caused by morphological distortion in existing simulated lunar soil, and can achieve high-precision engineering mass production, meeting the experimental needs of large-scale engineering projects for lunar construction.

[0059] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A melting centrifugal mineral particle morphology reshaping device, characterized in that, The system includes a high-temperature melting system for raw minerals (11), a mineral slurry transport system (12), a centrifugal mineral particle size control system (13), and a mineral particle cooling and morphology reshaping system (14). The high-temperature melting system for raw minerals (11) includes a melting chamber (112) for sintering mineral powder. The inlet of the melting chamber (112) is equipped with a feed conveyor (111). The inner liner of the melting chamber (112) is coated with a platinum high-temperature resistant layer and is equipped with a stirring blade (113). The bottom of the melting chamber (112) is equipped with a liquid outlet (114). The mineral molten slurry transport system (12) includes a funnel-shaped storage chamber (121) that is sealed and connected to the outlet (114). The funnel-shaped storage chamber (121) is connected to a pressure tank (123), and a metering pump (124) is provided at the bottom of the funnel-shaped storage chamber (121). The output end of the metering pump (124) is connected to a nozzle (125) through a transport pipe (122) lined with alumina ceramic. The centrifugal mineral particle size control system (13) includes a heat control turntable (131) located directly below the nozzle (125). A servo frequency converter motor (132) is connected to the bottom of the heat control turntable (131). A heater is provided on the upper surface of the heat control turntable (131), and an image recognition camera (133) is installed above the heat control turntable (131). The servo frequency converter motor (132), heater, image recognition camera (133), melting chamber (112), stirring blade (113), pressure tank (123), and metering pump (124) are all electrically connected to the control center (134). The mineral particle cooling and morphology reshaping system (14) includes a cooling chamber (141) and an ion beam gun (142) disposed on its right side. The mineral particles centrifugally formed on the thermal control turntable (131) enter the cooling chamber (141) under centrifugal force and are rapidly cooled before being morphologically modified by the ion beam gun (142).

2. The melting centrifugal mineral particle morphology reshaping device according to claim 1, characterized in that, The feeding track (111) is a detachable structure, and multiple ceramic inserts are embedded on the upper surface of the feeding track (111); the inner liner of the melting chamber (112) is arc-shaped and its size is adapted to the diameter of the stirring blade (113); the stirring blade (113) is provided with a spiral scraper made of high temperature resistant alloy material, and the outer surface of the stirring blade (113) is mirror polished.

3. The melting centrifugal mineral particle morphology reshaping device according to claim 1, characterized in that, The inner wall of the funnel-shaped storage chamber (121) is laser-polished and the bottom cone angle is not less than 70°. The outer wall of the funnel-shaped storage chamber (121) is provided with a heat insulation layer with a thickness greater than 15cm. The pump body of the metering pump (124) is made of zirconium oxide, and the nozzle (125) is made of platinum and its inner surface is mirror-polished. The pressure tank (123) is filled with inert gas, and its working pressure range is 0.1~0.5MPa. The inner volume V of the pressure tank (123) is... 罐 >5×V 管 V 管 The volume of the transmission pipe (122).

4. The melting centrifugal mineral particle morphology reshaping device according to claim 1, characterized in that, The image recognition camera (133) is used to monitor the particle size and roundness of the mineral particles on the thermal control turntable (131) in real time and transmit the data to the control center (134). The control center (134) controls the parameters of the servo frequency conversion motor (132), heater, melting chamber (112), stirring blade (113), pressure tank (123) and metering pump (124) to regulate the particle size and roundness of the formed mineral particles.

5. The melting centrifugal mineral particle morphology reshaping device according to claim 1, characterized in that, The temperature control range of the cooling chamber (141) is -190℃ to 130℃ to simulate and restore the temperature environment of the lunar surface; the ion beam gun (142) uses argon ions and can control the ion beam injection angle from 0 to 60°. The beam energy of the ion beam gun (142) is 1 to 30 keV, of which 1 to 5 keV is used for low-energy surface light etching and 5 to 30 keV is used for high-energy deep sputtering injection modification; a vacuum pumping device is provided in the chamber where the ion beam gun (142) is located.

6. A method for preparing lunar soil glass spheres, based on the melting centrifugal mineral particle morphology reshaping device as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step S1: Based on the material composition of lunar regolith in the lunar regolith sample, select the corresponding low-silica basalt as the main raw material; Step S2: After cutting, crushing, ball milling and grinding the low-silica basalt main raw material, basalt mineral powder M1 is obtained. Step S3: Mix one part of basalt mineral powder M1 with two parts of mineral melting additive powder M2 to obtain a mixture. Step S4: After the mixture is sintered and melted in the melting chamber, the slurry is transported to the thermal control turntable by the metering pump and centrifuged to form lunar soil glass spheres of different particle sizes. In step S5, the centrifuged lunar regolith glass spheres are sent into a cooling chamber for rapid cooling, and the morphology of lunar regolith glass spheres of different particle sizes is modified by an ion beam gun to simulate the impact melting process of real lunar regolith, thus forming lunar regolith glass spheres with simulated impact melting history.

7. The method for preparing lunar soil glass spheres according to claim 6, characterized in that... In step S2, the method for preparing the basalt mineral powder M1 includes: First, the weathered surface of the low-silica basalt raw material collected in the field is cut off by a wire cutting machine to expose the fresh surface. Then, it is put into a jaw crusher for crushing. After crushing, it is poured into a planetary ball mill or a drum ball mill for ball milling. Then, it is sorted by a nano-resolution optical microscope to classify and collect the mineral particles according to the preset categories. Finally, it is ultra-finely ground by an air jet mill to obtain the basalt mineral powder M1.

8. The method for preparing lunar soil glass spheres according to claim 6, characterized in that... In step S3, the raw minerals for the mineral melting additive powder M2 are selected based on the color and mineral composition of the lunar regolith glass spheres to be obtained. When the lunar regolith glass spheres to be obtained are red, hematite and graphite powder are selected as raw minerals. When the lunar regolith glass spheres to be obtained are black, ilmenite is selected as the raw mineral. The raw minerals are screened and then ultra-finely ground in an air jet mill to obtain the mineral melting additive powder M2.

9. The method for preparing lunar soil glass spheres according to claim 6, characterized in that... In step S4, during the centrifugal molding of the lunar regolith glass spheres, the particle size and roundness of the mineral particles on the thermal control turntable are monitored in real time by an image recognition camera and transmitted to the control center. The control center controls the sintering temperature of the melting chamber, the stirring speed of the stirring blade, the working pressure of the pressure tank, the mineral slurry transmission rate of the metering pump, and the rotation speed and surface temperature of the thermal control turntable to ensure that the particle size of the molded lunar regolith glass spheres is within a preset range and that the roundness of the molded lunar regolith glass spheres is >0.

95.

10. The method for preparing lunar soil glass spheres according to claim 6, characterized in that... In step S5, the morphological modification of lunar regolith glass spheres of different particle sizes using an ion beam gun includes: Based on the history of thermal melting reaction and the reduction environment of extraterrestrial impact on lunar soil glass spheres in lunar soil samples, the morphological modification stages of ion beam bombardment are divided. The morphology modification stage includes a low-energy surface light etching stage with a beam energy of 1~30keV and a high-energy deep sputtering injection modification stage with a beam energy of 5~30keV.

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