| Leaching |
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Extractive Metallurgy The process used in metallurgy, mainly for working oxidized ores. From a time now leaching of copper sulfide minerals it is done through bacterial leaching processes. In the case of leaching of gold ores (oxides) design of the pads they are according to the morphology of the area, according to details that we will begin to select the type of pad, either reusable pad, for expandable or leaching valley type (in case of Pierina).
Practical Applications Industrially leaching is used to prepare powders, for this drug (generally a medicinal plant) is sprayed is taken, and mixed with menses (alcohol) placed in a leachate and left macerating the required time. Also it can be said leaching treatment of mineral concentrates and other materials containing metals, leaching is performed by a wet process with acid soluble minerals dissolved and recovered in a pregnant leach solution. Of practical use in mining by cyanidation of gold and other minerals. |
Introduction:
Developing a source for purposes of working with copper plates, which act as cathodes and performing leaching, so it requires high currents in DC, for this case a DC source having a current output maximum of 50 is requested amperes y 20 volts we had many problems to implement a protection circuit and display data on the LCD.
Schematic:
Power Board
Control Board
Album Pics:
| transformer and power transistors |
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| Test power resistors, each of 2 ohm |
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Fisrt Try (MSP430G)
A first attempt with the MSP430 Texas Instruments was performed to control LCD and displayar current measurement and votaje on screen, but we find the problem that it was necessary to calculate an RMS TRUE and microcontroller had no sufiente memory ,so I decided to use Hercules RM42x, with excellent memory and designed for Industrial applications.
| MSP430G |
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True RMS (Vol and Amp):
Somehow the current and voltage, given by the switching transistors was not linear as expected, making for a more accurate measurement is true RMS decided by applying a programming.
| Hercules RM42x (100MHz/32bits) |
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Control Power by transistor
Current sensor (Current Transducer LA 125-P/SP4)
| Last update here: |
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| TI Hercules LaunchPad RM42x: Supply DC Source 20v/50A Part 2 |
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