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Pilot Testing

MINERAL PROCESSING

Mineral processing is science and art of extracting metals and nonmetal from their ores, refining them and preparing them for use. Within extractive metallurgy, the major divisions in the order they may most commonly occur are, Mineral Processing (or Beneficiation),

In mineral processing, a number of unit operations are required to prepare and classify ores before the valuable constituents can be separated or concentrated and then forwarded on for use or further treatment. The field of mineral processing has also been given other titles such as mineral dressing, ore dressing, mineral extraction, mineral beneficiation, and mineral engineering. These terms are often used interchangeably.

Ores and Mineral

Ore is a term used to describe an aggregate of minerals from which a valuable constituent, especially a metal, can be profitably mined and extracted. Most rock deposits contain metals or minerals, but when the concentration of valuable minerals or metals is too low to justify mining, it is considered a waste or gangue material. Within an ore body, valuable minerals are surrounded by gangue and it is the primary function of mineral processing, to liberate and concentrate those valuable minerals.

MINERAL PROCESSING OF DHAUBADI IRON ORE


Department of Mines and Geology, under Ministry of Industry, Commerce and Supplies Government of Nepal has signed MOU with Southwestern Metallurgical Geological Testing Center under Sichuan Institute of Metallurgical Geology & Exploration (SIMGE) for mineral process and pilot test lab facilities for Dhaubadi Iron Ore.

A. First MOU, Metallurgical test, completed

1. MOU (dated 26 JUNE 2018) for Metallurgical and others different levels of testing of Iron ore was completed and final report are received as:

Result of Metallurgical test


B. Second MOU, Pilot Test, on going

1. As continuity of Metallurgical test for MoU for pilot test of hematite was signed on 17th June, 2019. The main objective of the MoU were:

SAMPLE COLLECTION

About 5300 Kg hematite samples within 16 different places from Pokhari, Ramche and Dhaubadi blocks of Dhaubadi iron deposit, Nawalpur District in month of June, 2019.

PILOT TESTING

B. Second MOU, Pilot Test, on going

Sample Packed


Crushed Sample in SMGTC

Chemical Analysis of Sample

The analysis results indicate that, the Fe in the ore is the main recovery composition with content of 34.84%; the main impurity composition is SiO2 with content of 44.70%; the content of K2O, Na2O, P and S is respectively 0.012%, 0.013%, 0.034% and 0.003%.



Name Weight Product Rate TFe Grade
Pokhari 1549.00 30.98 34.65
Namche 2516.00 50.32 32.36
Dhaubadi 935.00 18.70 39.30
Total 5000.00 100.00 34.37

Objective of Pilot Test

The main objective of pilot test is get qualified concentrate from low TFe grade hematite ore. previous.




Sample Preparation of Pilot Test

Jaw Crusher and roll crusher are used for grinding samples to the size of 3 mm which was completed.




Ore Characteristics and Mineral Composition




RESULT OF PILOT TEST

Raw Ore—Crush and Grinding—Magnetic Separation—Grinding—Reverse Flotation—Concentrate

SIGME recommended Magnetic Separation- Reverse Floatation which could obtain qualified concentrate with TFe 56.94% in recovery rate of 70.02%.