Column leaching method conforming to shrinking core model
A technology of nuclear model and column leaching, which is applied in the direction of improving process efficiency, etc., can solve the problem that it is difficult to meet the requirements of uniform and stable reaction conditions of the shrinkage nuclear model, it is difficult to solve key kinetic parameters, and the chemical conditions of the leaching column are not uniform, etc. problem, to achieve the effect of narrow particle size, small particle size, and reduced adsorption capacity
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Embodiment 1
[0052] 1.5g of a certain secondary copper sulfide pure mineral, 75% of the particle size is 30-55μm, and the spray liquid is Fe with a concentration of 10g / L 2 (SO 4 ) 3 The solution is 300ml, the spray rate is 5ml / min, the ORP of the spray liquid is controlled at 750±10mV (vsSHE), the pH of the spray liquid is controlled at 1.00±0.05, the temperature is controlled at 30°C, the height of the upper packing layer is 4.5cm, the middle ore layer The height is 0.5cm, the height of the middle filler layer is 0.5cm, the height of the lower filler layer is 4.5cm, the inner diameter of the PVC shell is 4.5cm, and the filler is glass beads. The above-mentioned device is used for reaction, and samples are taken every 12h. ICP-OES Determination of Cu in leachate 2+ Concentration, the leaching rate X of Cu is calculated according to X=C*V / (G*a)*100%. respectively using the kinetic equation 1-(1-X) in the shrinkage kernel model 1 / 3 、3-2X-3(1-X) 2 / 3 , 1-(1-X) 1 / 3 +B[3-2X-3(1-X) 2 / 3 ] ...
Embodiment 2
[0055] 2g of a certain secondary copper sulfide pure mineral, with a particle size of 30-55μm accounting for 75%, the spray liquid uses Fe with a concentration of 20g / L 2 (SO 4 ) 3 The solution is 200ml, the spray rate is 3ml / min, the ORP of the solution is controlled at 750mV±10mV (vsSHE), the pH of the solution is controlled at 1.00±0.05, the temperature is controlled at 45°C, the height of the upper packing layer is 7cm, and the height of the middle mineral layer is 0.4cm. The height of the middle filler layer is 1.1cm, the height of the lower filler layer is 7cm, the inner diameter of the PVC shell is 6cm, and the filler is quartz sand. The above-mentioned device is used for the reaction. The sampling in the early stage of the reaction is relatively intensive, and the time interval in the later stage becomes longer (0~10h every 1h , 10-50h every 3h) to take samples, and use ICP-OES to measure Cu in the leachate 2+ Concentration, the leaching rate X of Cu is calculated ac...
Embodiment 3
[0058] 1g of a certain secondary copper sulfide pure mineral, 75% of the particle size is 30-55μm, and the spray liquid uses Fe with a concentration of 5g / L 2 (SO4) 3 The solution is 300ml, the spray rate is 10ml / min, the ORP of the solution is controlled at 750mV±10mV (vsSHE), the pH of the solution is controlled at 1.00±0.05, the temperature is controlled at 60°C, the height of the upper packing layer is 3cm, and the height of the middle mineral layer is 0.3cm. The height of the middle filler layer is 0.5cm, the height of the lower filler layer is 3cm, the inner diameter of the PVC shell is 4cm, and the filler is quartz sand. The reaction is carried out by the above-mentioned device, and samples are taken every about 1h, and Cu in the leachate is measured by ICP-OES. 2+ Concentration, the leaching rate X of Cu is calculated according to X=C*V / (G*a)*100%. respectively using the kinetic equation 1-(1-X) in the shrinkage kernel model 1 / 3 、3-2X-3(1-X) 2 / 3 , 1-(1-X) 1 / 3 +B[3-...
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