NrgQstMetalsExtraction

NrgQst Aerodynamic Metals Extraction

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APPLICATION:

NrgQst dry mining equipment and machinery is designed and configured for pulverization of metals bearing ores and mining wastes, classification, concentration, separation and recovery of metals and minerals concentrate in dry mode and without the use of water.

Dry processing has many advantages over wet processing, especially the conservation of water, one of our most precious resources.

NrgQst dry mining equipment and machinery is designed and configured for pulverization of metals bearing ores or matrixes for the concentration, separation and recovery of precious metals, light metals and other heavy metals, either from placer (alluvial) deposits or primary surface or subsurface (hard rock) applications, and wastes from mining operations.

ADVANTAGES:

The NrgQst dry mining equipment and machinery (Dry Processing Plants) produce as high or higher grade products with generally less concentrate loss than wet concentration methods.

NrgQst Dry Processing Plants may be located anywhere (self-contained energy requirements), regardless of water supply. There is no water to pump or bring from a distance, therefore eliminating the cost of pipes, pumps and related overhead costs.

In most cases the NrgQst Dry Processing Plants increase capacity, cut down on the number of units and space necessary; resulting in smaller and less expensive plants with lower power costs.

Due to greater sensitivity to slight differences in density of the particles, NrgQst Dry Processing Plants will successfully treat ores which are not amenable to wet concentration in the gravity separation methods.

Dry ore may be efficiently separated at the economical releasing point of the minerals, thus making sure the resulting products are dry and are handled, shipped and marketed at a lower cost than wet processing methods.

Since no water is needed to produce separation, climatic conditions will not affect efficient operation.

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Step 1 : Size Reduction

NrgQst has an exclusive license on a unique size reduction (communition) process unit (Predator) for the pulverization of metal bearing ores and tailings.

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Step 2 – Concentration

The working length of test unit is 7.85 feet and the width is 3.925 feet. The frequency of the separation chamber can be adjusted between 4 – 15 Hz. The air consumption measured is between 9 – 21 m3 per hour and the total energy consumption is 6-15 kW. The capacity of this unit ranges from 5 to 25 t/h depending on the bulk density of the feed material.

The material is passed through a box-like channel the bottom of which consists of a specially designed screen, and covers four individually adjustable consecutive air chambers. The combination of airflow and vibration- individually adjusted for each material size and density range- fluidizes the material on the screen. Additionally, the vibration moves the material through the channel, comparable to a linear vibrating screen. Along the lengthwise movement of the fluidized material through the channel, the segregation of heavies and lights takes place. At the end of each air chamber, the heavies’ layer is discharged, controlled by an adjustable splitter. The light material layer is discharged at the end of the channel.

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Step 2 – Air Classification (Concentration)

To insure that the majority of the contaminants have been removed, NrgQst has developed a new aerodynamic air classification system that utilizes conventional cyclones combined with specialized separators for concentration of metals.

The system then separates the mineral grains by a process called “electrostatic beneficiation”, which means charging them with static electricity and separating the different minerals where the minerals have different electrostatic affinities.

Step 3 – Aerodynamic Particle Separation (APS)
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An aerodynamic actuator using steady suction has been used to sort particles of various sizes and densities.

  • The system has the ability to sort spherical particles with similar size distributions that differ in density by a factor of four simply by modifying the flow speed appropriately, and
  • for uniform particles, the standard deviations are very low (in most cases, less than 2 µm). Cut sharpness as high as 0.9 were measured.
  • APS is also capable of concentrating air samples. Our measurements indicate that an air sample containing particles with the density of water can be concentrated by a factor of 10.