Process for providing a homogeneous particle-containing slurry comprising the steps of: (a) providing a vessel comprising at least one impeller rotating around a vertical axis of the vessel, wherein a rotational speed n 1 of the at least one impeller is higher than n min according to equation, the vessel further comprising an inlet and an outlet; (b) introducing a particle-containing slurry into the vessel or introducing components forming the particle-containing slurry into the vessel; (c) rotating the at least one impeller at least around the vertical axis for homogenizing and/or maintaining a homogeneous particle distribution within the slurry; (d) withdrawing the homogeneous particle-containing slurry via the outlet; (e) reducing the rotational speed n 1 of the at least one impeller to a reduced rotational speed n red, whereas n red is lower than n 1 and higher or equal than n min according to equation: n min = Sv 0.1 D p 0.2 g Δρ ρ f 0.45 B 0.13 D a 0.85 with n min = minimum rotational speed of the impeller, S = shape factor of the impeller, v = kinematic viscosity, D p = average particle size in the slurry, g = gravitational constant, Δ ρ = difference between particle density ρ p and liquid density ρ f in the slurry ( ρ p - ρ f), ρ f = density of the liquid phase of the slurry, B = 100 * solid weight/liquid weight, D a = diameter of the impeller charaterized in that the at least one impeller has a vertically upper end with respect to the vertical axis of the at least one impeller and a vertically lower end with respect to the vertical axis of the vessel and wherein the reducing of the rotational speed of the impeller is effected when the level of the slurry during withdrawal is within a range from 0.5* D a to 0.1* D a above the vertically upper end of the at least one impeller and is continued until the level of the slurry is within a range from 0.1* D a to 0.05* D a below the vertically lower end of the at least one impeller. (a) providing a vessel comprising at least one impeller rotating around a vertical axis of the vessel, wherein a rotational speed n 1 of the at least one impeller is higher than n min according to equation, the vessel further comprising an inlet and an outlet; (b) introducing a particle-containing slurry into the vessel or introducing components forming the particle-containing slurry into the vessel; (c) rotating the at least one impeller at least around the vertical axis for homogenizing and/or maintaining a homogeneous particle distribution within the slurry; (d) withdrawing the homogeneous particle-containing slurry via the outlet; (e) reducing the rotational speed n 1 of the at least one impeller to a reduced rotational speed n red, whereas n red is lower than n 1 and higher or equal than n min according to equation: n min = Sv 0.1 D p 0.2 g Δρ ρ f 0.45 B 0.13 D a 0.85 with n min = minimum rotational speed of the impeller, S = shape factor of the impeller, v = kinematic viscosity, D p = average particle size in the slurry, g = gravitational constant, Δ ρ = difference between particle density ρ p and liquid density ρ f in the slurry ( ρ p - ρ f), ρ f = density of the liquid phase of the slurry, B = 100 * solid weight/liquid weight, D a = diameter of the impeller charaterized in that the at least one impeller has a vertically upper end with respect to the vertical axis of the at least one impeller and a vertically lower end with respect to the vertical axis of the vessel and wherein the reducing of the rotational speed of the impeller is effected when the level of the slurry during withdrawal is within a range from 0.5* D a to 0.1* D a above the vertically upper end of the at least one impeller and is continued until the level of the slurry is within a range from 0.1* D a to 0.05* D a below the vertically lower end of the at least one impeller. n min = minimum rotational speed of the impeller, S = shape factor of the impeller, v = kinematic viscosity, D p = average particle size in the slurry, g = gravitational constant, Δ ρ = difference between particle density ρ p and liquid density ρ f in the slurry ( ρ p - ρ f), ρ f = density of the liquid phase of the slurry, B = 100 * solid weight/liquid weight, D a = diameter of the impeller charaterized in that the at least one impeller has a vertically upper end with respect to the vertical axis of the at least one impeller and a vertically lower end with respect to the vertical axis of the vessel and wherein the reducing of the rotational speed of the impeller is effected when the level of the slurry during withdrawal is within a range from 0.5* D a to 0.1* D a above the vertically upper end of the at least one impeller and is continued until the level of the slurry is within a range from 0.1* D a to 0.05* D a below the vertically lower end of the at least one impeller.