Time of Batch Leaching Formula:
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Definition: This calculator determines the required contact time between solids and solvent in a batch leaching process to achieve a desired solute concentration.
Purpose: It helps chemical engineers and process technicians optimize leaching operations in industries like mining, metallurgy, and chemical processing.
The calculator uses the formula:
Where:
Explanation: The formula calculates the time required for the solute concentration in the bulk solution to reach a specified value based on mass transfer principles.
Details: Accurate time calculation ensures efficient extraction of valuable components while minimizing energy consumption and processing costs.
Tips: Enter all required parameters with positive values. The bulk concentration must be less than the saturated concentration for valid results.
Q1: What affects the mass transfer coefficient (KL)?
A: It depends on solvent properties, temperature, particle size, and agitation intensity.
Q2: How is the leaching area determined?
A: It's the total surface area of solid particles exposed to the solvent.
Q3: What if I get negative time results?
A: This occurs when C > CS, which is physically impossible. Check your concentration values.
Q4: Can this be used for continuous leaching?
A: No, this formula is specifically for batch leaching operations.
Q5: How does temperature affect the calculation?
A: Temperature impacts both KL and CS, so use values appropriate for your operating temperature.