The invention relates to a method for preparing a mixture which has sugar beet pulp as the extraction material, a sand and / or fine gravel fraction and a sugar solution as the extraction solution, comprising the steps: (a) providing the mixture in a mash compartment (12) of a mash (10) and (b) separating sand and / or fine gravel from the mixture in a settling chamber (20) which is arranged on the mash compartment (12) and / or a pipeline (C), (c) for separating the sand and / or Fine gravel process fluid containing the extraction solution containing the extraction solution is fed to the settling chamber (20) and a flow is generated in the direction of the mash compartment (12) and / or the pipeline (C), as well as a mash for preparing a mixture, the sugar beet pulp as extraction material, a sand - and / or fine gravel and an extraction solution with: (a) a mash compartment (12) for the mixture, (b) at least one settling chamber (20) for sand the mash compartment (12) and / or a pipeline (C) and (c) a retaining device (21) which is arranged between the mash compartment (12) and / or the pipeline (C) and the at least one settling chamber (20) to prevent at least part of the extraction material from entering the at least one settling chamber (10), characterized by (d) a feed connection (22) arranged on the at least one settling chamber (20) and a feed device (H, 61, 71) coupled thereto for supplying process fluid containing processed extraction solution into the at least one settling chamber (20)
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