Method and system for in-situ testing grade of big ore block by electron-air shielding radiation effect

A technology to annihilate radiation and large ores, which is applied in the fields of material analysis using wave/particle radiation, nuclear radiation exploration, material analysis using radiation, etc., can solve the problem of high cost, time-consuming and labor-intensive, impossible to meet the real-time requirements of the production process Control and other issues, to achieve the effect of convenient operation, cost reduction and efficiency improvement

Inactive Publication Date: 2004-12-08
DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO +1
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Problems solved by technology

The process of the two methods is time-consuming, labor-intensive, and expensive. They are only suitable for laboratory determination, and it is difficult to meet the needs of full and rapid detection of ore grades, and it is impossible to meet the requirements of real-time control of the production process.

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  • Method and system for in-situ testing grade of big ore block by electron-air shielding radiation effect
  • Method and system for in-situ testing grade of big ore block by electron-air shielding radiation effect
  • Method and system for in-situ testing grade of big ore block by electron-air shielding radiation effect

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Embodiment Construction

[0020] Schematic diagram of the structure of the on-line detection system for the effect of electrons on annihilation radiation for large ore grades, as shown in figure 1 shown. What described radioactive source adopts activity is 1.85GBq 226 Ra, the detector is a scintillation detector composed of φ100×100mm NaI crystal, photomultiplier tube, preamplifier and high voltage generator.

[0021] The radiation source 6 and the detector 7 are arranged in a frame with an upper opening and two grooves, a shielded radiation source 6 is placed in one groove, and a shielded detector 7 is placed in the other groove. The axes of the source 6 and the detector 7 are on the same horizontal line, the radiation source 6 is opposite to the receiving end of the detector 7, and the depleted uranium 4 is arranged in the middle, and an opening is arranged above the radiation source 6 and the detector 7, and the depleted uranium 4 is separated from the radiation source 6. There is an opening less ...

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Abstract

An in-line test method and system for fast analyzing the grade of big ore block in metal mine or ore dressing plant is composed of intelligent controller, radioactive source, detector, scaled belt and industrial control computer. The said radioactive source and detector, which are isolated by lean uranium, are arranged on a frame. the included angle between photon beams emitted by radioactive source and received by detector must be less than 60 deg.C. The said detector has heater and temp controller for constant temp (40-60 deg.C). Its advantages include high analysis speed and efficiency and low error less than 0.4%.

Description

technical field [0001] The invention belongs to the field of nuclear detection technology application and automatic detection technology, and specifically relates to an online detection method and system for the grade of large ore due to the effect of electrons on annihilation radiation. Background technique [0002] In the prior art, the ore grade is generally determined by X-ray fluorescence method or chemical analysis method. Since the penetration ability of X-ray fluorescence is extremely weak (less than 1mm), the measurement of X-ray fluorescence is seriously affected by the particle size of the ore. X-ray fluorescence analysis can only be carried out if the powder is made into thin slices with uniform thickness and constant density; while using chemical analysis method, it is also necessary to first crush, grind, sieve, and shrink the ore before chemical analysis can be carried out. The process of the two methods is time-consuming, labor-intensive and expensive, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/02G01N23/203G01V5/00
Inventor 侯朝勤
Owner DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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