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Sorting mined material

A sorting machine and thermal analysis technology, applied in the direction of sorting, material thermal conductivity, etc., can solve the problem that chalcopyrite and pyrite minerals cannot be distinguished from each other

Inactive Publication Date: 2012-10-17
TECHNOLOGICAL RESOURCES
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Thus, while heating rates can be used to identify chalcopyrite and pyrite from these microwave-transparent host rocks (as the basis for a sorting method), the use of microwave frequencies (100MHz-10GHz) cannot discriminate such chalcopyrite and pyrite. Iron ore minerals are distinguished from each other

Method used

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  • Sorting mined material

Examples

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Embodiment Construction

[0038]This example is described in the context of a method of recovering valuable metals in the form of copper from low-grade copper-bearing ores in which copper is present in the form of chalcopyrite, And the ore also contains worthless metal sulphides in the form of pyrite. The purpose of the method in this example is to identify the minerals chalcopyrite and pyrite. Where the minerals of chalcopyrite and pyrite are in separate particles, the minerals can be separated into two streams. The separated chalcopyrite particles can then be processed as desired to recover copper from the particles. Separating the chalcopyrite and pyrite particles prior to downstream recovery steps significantly increases the average grade of the material processed in these steps. In cases where the minerals of chalcopyrite and pyrite are in the same grain, the ratio of chalcopyrite to pyrite within each grain in the gangue can be determined such that a net economic analysis for that grain can be ...

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Abstract

A method of sorting mined material, such as mined ore, is disclosed. The method comprises exposing particles of mined material to radio frequency electromagnetic radiation and heating particles depending on the minerals present in the particles and then thermally analysing particles exposed to radio frequency electromagnetic radiation to detect temperature differences between particles which indicate differences in the minerals in the particles. The method also comprises sorting the particles on the basis of the results of the thermal analysis.

Description

technical field [0001] The present invention relates to the use of radio frequency electromagnetic radiation to facilitate the sorting of mined material. [0002] The term "radiofrequency electromagnetic radiation" is here understood to mean electromagnetic radiation having a frequency in the range 1-100 MHz. [0003] In particular, although by no means exclusively, the present invention provides a method of sorting minerals, such as sulfide minerals, such as chalcopyrite and pyrite, when exposed to microwave frequency electromagnetic radiation. Minerals exhibit a very similar heating response, and electromagnetic radiation at microwave frequencies has been proposed as a basis for sorting mined materials. In this context, the present invention provides an opportunity to distinguish between valuable and non-valuable minerals. Furthermore, in this context, the present invention also provides an opportunity to assess the relative amounts of valuable and non-valuable minerals in...

Claims

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Application Information

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IPC IPC(8): G01N25/18
CPCB07C5/342B07C5/363B07C5/34
Inventor 塞缪尔·金曼乔治斯·迪米特拉基斯克里斯托弗·多兹
Owner TECHNOLOGICAL RESOURCES
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