The so-called spray intensity refers to the amount of leaching solution sprayed to a certain amount of ore per unit time. Usually expressed in liters/ton•hour or liter/meter 2 • hour. Increasing the spray intensity can accelerate the circulation of the leaching solution, accelerate the mass transfer process, reduce the concentration gradient of the reactants and products at the liquid-solid interface, and facilitate the diffusion, thereby increasing the leaching speed of gold . However, increasing the spray intensity will also increase the amount of impurities leaching in the ore, and relatively reduce the ratio of the concentration of gold in the leachate to the sum of the impurity concentrations, increasing the difficulty of the next treatment. The effect of spray intensity on the leaching rate is shown in the figure below. It should be noted that the spray intensity varies depending on the nature of the ore and should be determined by experiment.
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