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: 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.