Waste ore sorting method and device based on laser induced breakdown spectroscopy (LIBS)

A laser-induced breakdown and sorting device technology, applied in the field of laser spectrum detection, can solve the problems of not having the function of real-time monitoring and adjustment of sample height, irregular shape, and not having the function of area array scanning.

Active Publication Date: 2017-06-13
JILIN UNIV
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Problems solved by technology

However, after the waste ore is crushed, most of them have irregular shapes and surface bumps. The traditional LIBS technology does not have the function of real-time monitoring and adjustment of the sample height, so the signal stability will be poor due to laser def

Method used

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  • Waste ore sorting method and device based on laser induced breakdown spectroscopy (LIBS)
  • Waste ore sorting method and device based on laser induced breakdown spectroscopy (LIBS)
  • Waste ore sorting method and device based on laser induced breakdown spectroscopy (LIBS)

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Embodiment

[0030] This embodiment is used to measure the nickel element content of Hongqiling Nickel Mine in Panshi, Jilin, and sort ores of different grades according to the measurement results. The structure diagram is as follows figure 1 As shown, the specific sorting process is divided into the following eight steps:

[0031] Step 1: Send the large pieces of ore into the crusher 1 for crushing, and then use the filter 2 to screen the shape and volume of the crushed ore, and the ore with a moderate volume directly enters the conveyor belt 3 for testing.

[0032] The second step: the conveyor belt 3 transports the ore sample to the detection area of ​​the sample shape detection system 4, such as figure 2 As shown, the linear laser projector 4-1 projects a narrow light band 4-4 onto the ore sample 4-3, which presents a distorted curve on the surface, and the ore is collected by the camera 4-2 at a non-projector viewing angle The sample image 4-6 is transmitted to the data processing c...

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Abstract

The invention belongs to the field of laser spectroscopy detection and ore sorting, and discloses a waste ore sorting method and device based on the laser induced breakdown spectroscopy (LIBS). The device comprises an ore pulverizer, a filter, a conveying device, a sample shape inspection system, an LIBS detection system, a mechanical sorting and ore collecting system and a measurement and control system. The pulverizer and the filter are used for smashing massive waste ore into small ore blocks of the similar sizes and shapes. The sample shape inspection system is used for obtaining the average heights and boundary dimensions of samples, and further controlling the focusing distance and scanning range of the LIBS detection system. The LIBS detection system is used for detecting material compositions of the ore and determining the ore grade. The mechanical sorting system conveys the ore and the waste ore to different ore collecting tanks separately according to detection results. The measurement and control system is used for performing unified coordination control over all functional units of the device.

Description

technical field [0001] The invention belongs to the technical field of laser spectrum detection, and relates to a mineral component detection method based on laser-induced breakdown spectroscopy technology and a mechanized automatic sorting device, which is suitable for rapid detection and sorting of ore grades. Background technique [0002] According to incomplete statistics, the number of mines currently owned by our country is about 120,000. Among them, the mines mined from the 1960s to the 1980s were mostly open-pit mining due to the limitations of technical conditions at that time. A large number of waste rocks are produced in the waste rock, because the mineral grade of the waste rock is low (1-2%), the traditional mineral processing methods, such as colorimetric method, specific gravity method and suspension method, are complicated in process and high in cost, and secondary mining is not feasible. It has economic benefits, so a large amount of waste rocks are hoarded....

Claims

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Application Information

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IPC IPC(8): B07C5/342B07C5/02G01N21/71
CPCG01N21/718B07C5/3425B07C5/02G01N21/71
Inventor 杨光王成皓李颖超刘可田地邱春玲姚立李春生孙玉桥
Owner JILIN UNIV
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