CN-117772420-B - Lunar loam ilmenite sorting and particle size grading device under lunar surface environment

CN117772420BCN 117772420 BCN117772420 BCN 117772420BCN-117772420-B

Abstract

The invention discloses a lunar ilmenite sorting and particle size classifying device in a lunar surface environment, wherein a mesh conveying belt penetrates through a parallel electric field formed by a first positive plate and a first negative plate, the first negative plate is provided with holes for receiving mineral materials charged by a friction charging unit, the first negative plate covers part of an upper belt of the mesh conveying belt, the other part of the upper belt is positioned at a feed inlet of the particle size classifying unit, one part of the first positive plate and the first negative plate form an electric field, the other part of the first positive plate extends to the feed inlet of the particle size classifying unit, and the particle size classifying unit comprises a second negative plate and a second positive plate which are fixed on two opposite sides of a classifying bin. The electric field formed by the two parallel electrodes realizes ilmenite separation. Especially, the length of the first negative plate is controlled outside the coverage range of the particle size grading unit, the longer first positive plate, the longer second positive plate and the longer second negative plate are utilized to form electric field force, the structure of the screening device can be simplified while the particle size grading is realized, the size and the weight of the device are reduced, and the transportation cost is reduced.

Inventors

CHEN JIEREN
XIA GUOJUN
GAN HONG
ZHAO KAI
CHEN SHUHAI
GE ZHIMIN

Assignees

深空探测实验室(天都实验室)
上海卫星工程研究所

Dates

Publication Date: 20260508
Application Date: 20231204

Claims (9)

1. The lunar ilmenite sorting and particle size classifying device in the lunar surface environment sequentially comprises a mineral material feeder, a feeding distributor and a friction charging unit according to a feeding sequence, and is characterized by further comprising an electric separation unit, a conveying unit and a particle size classifying unit, wherein the electric separation unit comprises a first positive plate and a first negative plate, the first positive plate and the first negative plate are arranged in parallel, the conveying unit comprises a mesh conveying belt, the mesh conveying belt penetrates through a parallel electric field formed by the first positive plate and the first negative plate, the first negative plate is provided with holes for receiving mineral materials charged by the friction charging unit, the first negative plate covers part of an upper belt of the mesh conveying belt, the other part of the upper belt is positioned at a feed inlet of the particle size classifying unit, one part of the first positive plate forms an electric field with the first negative plate, and the other end of the first positive plate extends to the feed inlet of the particle size classifying unit; The particle size classifying unit comprises a second negative plate and a second positive plate which are fixed on two opposite sides of a classifying bin, a plurality of partition plates are fixed on the side wall of the classifying bin, the particle size classifying unit is positioned above a mesh conveyor belt, a feed inlet of the particle size classifying unit is arranged at the bottom, and a plurality of partition plates are arranged at intervals in the height direction.
2. The lunar loam ilmenite sorting and particle size grading device under the lunar surface environment according to claim 1, wherein the inner ring of the mesh conveyor belt is provided with carrying teeth.
3. The lunar loam ilmenite sorting and particle size grading device in a lunar environment according to claim 1, wherein the mesh conveyor belt is tightly attached to the first negative plate and the first positive plate.
4. The lunar loam ilmenite sorting and particle size classifying device under the lunar surface environment according to claim 3, wherein the partition plate is obliquely fixed on the side wall of the classifying bin, a discharge hole is formed in the fixed point of the side wall of the classifying bin and the partition plate, and a collecting tank is fixed outside the discharge hole.
5. The lunar loam ilmenite sorting and particle size classifying device in a lunar surface environment according to any one of claims 1 to 4, wherein recovery bins are arranged at two ends of the mesh conveyor belt, and the mesh conveyor belt corresponding to the recovery bins is located outside the parallel electric field.
6. The lunar loam ilmenite sorting and particle size grading device in a lunar environment according to any one of claims 1 to 4, wherein the first positive plate, the first negative plate, the second negative plate and the second positive plate are all plated with insulating separators.
7. The lunar loam ilmenite sorting and particle size grading device in a lunar surface environment according to any one of claims 1 to 4, wherein the friction charging unit comprises a sleeve and a spiral structure, two ends of the sleeve are respectively provided with a feed inlet and a discharge outlet, and the spiral structure is made of aluminum and is fixed in the sleeve.
8. A lunar loam ilmenite sorting and size classifying device in a lunar surface environment according to any of claims 1 to 4, wherein at least two chute are provided in said distributor, each chute delivering mineral aggregate to a tribocharging unit.
9. The lunar loam ilmenite sorting and particle size classifying device according to any one of claims 1 to 4, further comprising a moving unit on which the mineral aggregate feeder, the feed distributor, the tribocharging unit, the electric separation unit, the conveying unit, and the particle size classifying unit are fixed.

Description

Lunar loam ilmenite sorting and particle size grading device under lunar surface environment Technical Field The invention relates to the technical field of deep space resource development, in particular to a lunar soil ilmenite sorting and particle size grading device in a lunar surface environment. Background Helium-3 is mainly enriched on the surface layer of lunar soil particles and exists in the form of helium bubbles or in the crystal lattice defect of minerals, while ilmenite is the mineral most enriched in helium-3 in lunar soil, so that the efficiency of capturing helium-3 gas can be effectively improved by carefully selecting ilmenite, and the ilmenite is also raw material for preparing water and infrastructure construction on the lunar surface, so that the comprehensive utilization development of lunar soil can be more effectively completed, the research on lunar soil ilmenite enrichment technology is developed in the global scope, and some research results are produced, but the defects of different degrees exist, as disclosed in the following patents: The publication number is CN115501945A, and the name is lunar soil ilmenite sorting device. The device mainly designs an electric separation device based on a rotating structure, and the device has the advantages of simple structure, higher gravity center, single function and smaller screening capacity. The mature mineral separation technology aiming at ilmenite on the ground at present mainly utilizes different characteristics of ilmenite, such as density, surface characteristics, electromagnetic characteristics and the like. The main methods for separating ilmenite include a gravity separation method, a flotation method, an electric separation method and the like, but because the gravity of the moon is only 1/6 of the earth, the gravity separation method by gravity is low in efficiency and needs to be supplemented because the gravity of the moon is 1.333 multiplied by 10 -8～1.333×10-12 mbar, and the common ore separation media such as water, air, chemical agents and the like on the ground are not easy to obtain, and the cost for transporting process fluid to the moon is high, so that low-gravity center, high-efficiency and movable ore separation equipment is required to be redesigned for lunar soil ore separation technology. According to LMS analysis of a lunar mineral spectrum analyzer, the lunar soil in a sampling area mainly comprises ilmenite (16.11%), olivine (1.86%), plagioclase (18.58%), pyroxene (14.08%), cement and glass (49.36%), wherein only ilmenite is a conductor, other minerals are non-conductors, ilmenite particles are easy to lose electrons and positively charged, other mineral particles are easy to obtain electrons and negatively charged, so that the electric charge properties of ilmenite in lunar soil are opposite to those of other gangue minerals, in addition, in the lunar extreme environment, the conductivity and dielectric loss of a lunar weathering layer are very low, and in addition, moisture and air flow interference for preventing particles from sticking together is absent in the lunar environment, so that the lunar mineral is suitable for ideal frictional electrification and electrostatic separation, and an electroseparation method is an ideal lunar ilmenite beneficiation method. The particle size of 95% of lunar soil particles in the lunar soil sample is concentrated at 1.40-9.35 mu m, so that the lunar soil is less in gravity and is extremely easy to float, and in addition, the smaller the particle size of the ilmenite substance is, the larger the specific surface area is, the higher the helium-3 content is, so that the particle size classification is necessarily realized while the ilmenite is separated aiming at the exploitation of helium-3 resources in the lunar soil, namely, a lunar soil ilmenite separation and particle size classification device under a lunar surface in-situ environment is designed. Disclosure of Invention The invention aims to overcome the defect that the existing ground ore dressing technology is not suitable for lunar surface environment, and provides a lunar soil ilmenite sorting and particle size grading device under the lunar surface environment. The invention solves the technical problems by the following technical means: The lunar loam ilmenite sorting and particle size classifying device in the lunar surface environment sequentially comprises a mineral aggregate feeder, a feed distributor, a friction charging unit, an electric separation unit, a conveying unit and a particle size classifying unit according to a feeding sequence, wherein the electric separation unit comprises a first positive plate and a first negative plate, the first positive plate and the first negative plate are arranged in parallel, the conveying unit comprises a mesh conveying belt, the mesh conveying belt penetrates through a parallel electric field formed by the first positive plate and the first negative plate, the