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Anshan type iron ore type determining method based on spectral features

A technology for spectral characteristics and determination methods, which is applied in the direction of material analysis, measuring devices, and instruments by optical means, and can solve problems such as iron ore type distinction.

Active Publication Date: 2018-01-16
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the method of real-time analysis and division of iron ore areas and iron ore types using remote sensing technology, and most of the models established are for the inversion of iron grades of iron ore, without distinguishing iron ore types

Method used

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  • Anshan type iron ore type determining method based on spectral features
  • Anshan type iron ore type determining method based on spectral features
  • Anshan type iron ore type determining method based on spectral features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1) Use the visible light-near-infrared spectrometer to scan the ground in the air, at an altitude of 300±15 meters, divide the ground into small squares, and scan each small square. The side length of the small squares does not exceed 2±0.2 meters, and obtain The average visible-near-infrared spectrum of each small square in the ground area;

[0062] Visible-near-infrared spectrometer test band range includes 0.35-1.8μm, spectral resolution is less than 8.5nm; spectral measurement is carried out on a sunny day from 10:00 to 14:00, and the sun altitude angle is 45±5°;

[0063] 2) Using the spectral feature differences between surrounding rocks and iron ore, and hematite and magnetite to establish an iron ore and surrounding rock identification model and an iron ore type identification model, the ground area scanned by aerial remote sensing Analyze and identify the visible light-near-infrared spectral features of each small square inside;

[0064] 2.1) Compare the spectr...

Embodiment 2

[0069] 1) Cores were taken from the iron ore block at the Anqian Open-pit Mine, where the Anshan-type iron ore is located. Since the Anshan-type iron ore consists of magnetite, hematite and quartz-associated ore, it was selected to have quartz or iron ore. a core of the tape, the core being processed to form a sample;

[0070] The sample is a circular sheet with a diameter of 6-10 cm and a thickness of 0.8-1.5 cm;

[0071] The sample surface is perpendicular to the quartz or iron ore bands within the sample;

[0072] 2) Using a visible light-near-infrared spectrometer to measure the spectrum of the sample, and obtain its visible light-near-infrared spectrum;

[0073] Visible-near-infrared spectrometer test band range includes 0.35-1.8μm, spectral resolution is less than 8.5nm;

[0074] 3) Using the iron ore type identification model established by the spectral feature difference between hematite and magnetite, the visible light-near infrared spectral features of the sample a...

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Abstract

The invention aims to solve the problem that methods which can distinguish surrounding rock and ore, recognize different types of ore and determine iron ore types on site, in situ, in real time, quickly and efficiently through aerial remote sensing detection of iron ore areas do not exist in the prior art, provides an Anshan type iron ore type determining method based on spectral features and belongs to the technical field of mining geology and remote sensing application. According to the method, visible light-near infrared spectrum tests are conducted on different surrounding rocks and different types of iron ores, the spectral features are analyzed, ore distinguishing models are established according to the spectral features, the ground is scanned by using aerial remote sensing to be divided into small grids, each small grid is scanned by a visible light-near infrared spectroscopy or samples are taken on site and scanned by the visible light-near infrared spectroscopy, and real-timedistinguishing of surrounding rocks and ores, recognition of different types of ores as well as recognition of different types of ores on site and in situ through aerial remote sensing can be realized.

Description

technical field [0001] The invention belongs to the technical field of mine geology and remote sensing application, in particular to a method for determining the type of iron ore based on spectral features. Background technique [0002] At present, the classification of iron ore types mainly adopts the methods of on-site sampling and indoor testing. The above-mentioned methods need to use mechanical or manual methods for on-site sampling. , High cost, slow speed, time-consuming and labor-intensive shortcomings. There is also a method of in-situ detection of ore using spectral testing, such as the application of the I-7000 portable mine grade composition analyzer, but this instrument tests the X-ray spectrum, which can only determine the elemental composition of the sample, and cannot test its mineral composition and Determine the ore type. [0003] Airborne hyperspectral remote sensing is the cutting-edge technology of remote sensing. With its unique technical characterist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359
Inventor 熊宏启孙厚广潘鹏飞徐冬林毛亚纯刘善军
Owner ANSTEEL GRP MINING CO LTD
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