Abstract: The invention relates to a method for a beneficiation process of minerals wherein: ore which contains valuable ore of too large a particle size is returned to a comminuting step, and the ore of the desired particle size is directed onwards to the following step of the method, where the comminuted ore is beneficiated by flotation for separating valuable minerals; and, in order to displace oxygen, carbon dioxide oversaturated water and/or carbon dioxide gas is fed to at least one of the following process steps: ore comminution, classification of commi¬nuted ore, intermediate step between comminution and classification, feeding of the comminution and/or classification.

Abstract: An apparatus includes first and second conveyor structures with first and second conveyor surfaces. The conveyor surfaces face each other and are arranged to define a comminuting space in the apparatus. The apparatus brings the conveyor surfaces in movement in the direction from a first end of the conveyor structures towards a second end of the conveyor structures, and the two conveyor surfaces are placed to face each other. The conveyor surfaces are additionally placed in a convergent manner so that the gap between the conveyor surfaces narrows in the movement direction of the conveyor surfaces. The advancing movement of the conveyor surfaces brings about compression in material being comminuted. The conveyor surfaces are in a double-converging so that in addition to the convergence in the movement direction, the conveyor surfaces are additionally convergent in the transverse direction in relation to the movement direction, the comminuting space thus also being double-converging.

Abstract: The invention relates to an apparatus for comminuting of material. The apparatus includes a first conveyor structure with a first conveyor surface, a second conveyor structure with a second conveyor surface, and in which apparatus the first conveyor surface and the second conveyor surface are set facing each other. The conveyor surfaces are arranged to define a comminuting space in the apparatus, The apparatus has means for bringing the conveyor surfaces in a movement in the direction of movement D where the two conveyor surfaces placed to face each other are arranged to move from a first end of the conveyor structures towards a second end of the conveyor structures. The conveyor surfaces positioned to face each other are placed in a convergent manner so that the gap between the conveyor surfaces narrows when examined in the movement direction of the conveyor surfaces, so that the advancing movement of the conveyor surfaces is arranged to bring about compression in the material being comminuted.

Abstract: An apparatus for comminuting of material that includes a first conveyor structure with a first conveyor surface, a second conveyor structure with a second conveyor surface, and in which apparatus the first conveyor surface and the second conveyor surface are set facing each other. The conveyor surfaces are configured in a double-converging manner so that in addition to said convergence in the movement direction, the conveyor surfaces are additionally placed in a convergent manner so that the gap between the conveyor surfaces also narrows in the transverse direction in relation to the movement direction, such that the comminuting space becomes double-converging.

Abstract: The invention relates to an apparatus for comminuting of material The apparatus comprises a first conveyor structure (CI) with a first conveyor surface (B1), a second conveyor structure (C2) with a second conveyor surface, and in which apparatus the first conveyor surface (B1) and the second conveyor surface (B2) are set facing each other. The conveyor surfaces (B1, B2) are arranged to define a comminuting space (GS) in the apparatus, The apparatus has means (MIA, M2A) for bringing the conveyor surfaces in a movement in the direction of movement D where the two conveyor surfaces (B1, B2) placed to face each other are arranged to move from a first end (E1) of the conveyor structures towards a second end (E2) of the conveyor structures.

Abstract: A method for recovering carbon dioxide from gas, which method includes the steps of: pressurizing gas, feeding pressurized gas and water used as a solvent to an absorption column to 3 to 10 bar absolute pressure, feeding water received from the absorption column and carbon dioxide absorbed therein to a desorption column for recovering carbon dioxide from the water, recirculating water exiting the desorption column to the absorption column, recovering carbon dioxide exiting the desorption column, feeding at least part of the gas to an auxiliary desorption column prior to pressurizing the gas, and sending water exiting the desorption column back to the auxiliary desorption column. The method also applies to a corresponding system.

Abstract: A method for recovering carbon dioxide from gas, which method includes the steps of pressurizing gas, feeding pressurized gas and water used as a solvent to an absorption column to 3 to 10 bar absolute pressure, feeding water received from the absorption column and carbon dioxide absorbed therein to a desorption column for recovering carbon dioxide from the water, recirculating water exiting the desorption column to the absorption column, recovering carbon dioxide exiting the desorption column, feeding at least part of the gas to an auxiliary desorption column prior to pressurizing the gas, and sending water exiting the desorption column back to the auxiliary absorption column. The method also applies to a corresponding system.