Published 12-06-2024
Keywords
- dissolution rate,
- controlling step,
- correlation coefficient,
- parameter,
- optimum
How to Cite
Abstract
An investigation of the important factors involved in the extraction of lead from galena ore has been carried out. The effective parameters studied were particle size, stirring speed, acid concentration and solid/liquid ratio. The dissolution rate increased with increase in temperature, stirring speed, acid concentration and solid/liquid ratio and with decrease in particle size. All the experimental parameters were found to have influence on the leaching rate. The results showed that the optimum leaching conditions were observed to be 400 rpm stirring speed, 2.15M H2SO4 acid concentration, 70oC reaction temperature, 20:100 solid/liquid ratio and 63µm particle size. The result showed that correlation coefficients ( ) for surface chemical reaction and diffusion through product layer had large values of 0.97340 and 0.9954 respectively. This justifies the basis for combination of the two models involved in the leaching process. The mixed kinetic model also has a large value of 0.9928, and is the controlling step for the process.