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XHK-6000 automatic control system of heap leaching amalgamator
XHK-6000 automatic control system of heap leaching amalgamator

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XHK-6000
automatic
control system of
heap leaching
amalgamator

 

 

 

XHK-6000 automatic control system of heap leaching amalgamator

Application field

    XHK-6000 automatic control system of heap leaching amalgamator is developed by Xinhai Electromechanics Testing & Control Company based on foreign mature experiences and advanced technology, and is applied successfully in gold mine heap leaching with low grade for many companies. It makes the heap leaching production realize process control automatization and improves the economic benefit and managerial skill. 

Scheme

      The heap leaching amalgamator is almost surface working. In the process of spraying, the water is easy to evaporate or change the density of sodium cyanide liquor due to the rainwater. And the charcoal adsorbs it, which will change the density of CN and OH too. The main factors that affect the technics index are PH value of reagent liquor, density of sodium cyanide liquor, spraying intensity, leaching time etc. Therefore, this system adopts upper computer operating station, lower computer operating station, instruments and meters on site and power unit to form a DCS+FUZZY distributed system. It is mainly controls the density of sodium cyanide liquor, the amount of adding water and reagent according to the returned liquor density and rotate speed of spraying pump and reagent adding period.   

Function

The whole control process has two schema: automation and handmotion to ensure it works continuously.
Setting the human-computer interface or adjusting the density of sodium cyanide liquor, density of spraying, flow capacity of spraying liquor, spraying time, spraying intervals, liquor sampling intervals and amount etc.
According to the setup parameter, it automatically control the water adding amount, reagent adding amount and spraying condition.
According to the materials physical and chemical property, it sets the spraying time and has the function of spraying count down on line.
Display the settled and measured parameter on line, which is convenient to central control the technological process and realizes the unmanned management on site.
Dynamic display of the production process helps the worker to visually understand the technology condition and equipment operation condition.
According to the settled parameter, the sampler can achieve accurate sampling automatically. Then the workers dont need to touch the sodium cyanide liquor directly.
It will automatically form the liquor consumption and every parameter report, daily report, month report and trend map for 72 hours of parameter, which can also be printed. It is easy for technology adjustment and analysis. 
It has the function of early-warning and alarm when the sodium cyanide liquor exceeds the upper and lower limit.
It can be added photometer of atom absorbing the distributed light, measureing the original ore, tailings, lixivium and Au and Ag content in the relief liquor. These datum can be transported into this system to calculate the recovery. 
Level meter of arid pool can be added to realize automatic inspection and avoid the spraying pump sucking air.
This system has strong expansibility and communication function, which can be connected with companys local area network to realize long-distance supervisory and control. It is very good for the companys overall management.
It can increase the funciton and equipment quickly according to the actual demand. The upper computer can be used for many heap leaching site and reduce the investment.

Components

Upper computer and lower computer(PLC) system
Good human-computer interface and latticing structuere.
Stainless steel electromagnetic flowmeter.
metering pumpwith high accuracy
magnetci valve
Stainless steel automatic pipe sampler
frequency governor
photometer of atom absorbing the distributed light(single machine needs purchasing)

Effect of application

It reduces greatly the number of the operators on site and realizes the companys less worker with more benefit
The sodium cyanide liquor is made accurately and the dosage is stable and the liquor consumption can be reduced more than 10%.
The technological index can be kept stable within the optimum range. With the same leaching time, the leaching ratio of gold can be improved more than 1%.
Central control of many heap leaching site avoids the disoreded management and is easy to record.

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