Abstract: A dryer is part of a system for manufacturing cementitious board. The dryer is configured to return thermal energy from waste heat exhausted from a heating section of the dryer to an entry section of the dryer upstream of the heating section of the dryer.

Abstract: A method of producing a gypsum slurry for forming gypsum products, in particular gypsum boards, preferably gypsum paper boards, the method including the steps of: a) providing a gypsum paper product comprising a gypsum and a paper component, in particular a gypsum paper board, and/or broken parts thereof; b) wet grinding the gypsum paper product and/or the broken parts thereof containing at least parts of the paper component to form a wet ground gypsum paper component.

Abstract: The present application concerns a method for the production of a gypsum article, which includes introducing a measured quantity of carbon dioxide into the process water and mixing the stucco with the thus treated water. The CO2-enriched water has the advantage of providing compositions with sufficient processing properties at considerably lower water contents, thus allowing for significant energy savings. The invention also concerns slurries prepared according to this method as well as an apparatus which is adapted to implement this method.

Abstract: A method of producing a gypsum slurry for forming gypsum products, in particular gypsum boards, preferably gypsum paper boards, comprising the steps of: a) providing a gypsum paper product comprising a gypsum and a paper component, in particular a gypsum paper board, and/or broken parts thereof; b) wet grinding the gypsum paper product and/or the broken parts thereof containing at least parts of the paper component to form a wet ground gypsum paper component.

Abstract: The invention relates to a method for producing a plaster board having the steps: —provision of a conveyor belt apparatus having a carrying belt, —application of a first sheath to the carrying belt, —application of a plaster slurry to the first sheath to form a plaster coat and —application of a second sheath to the applied plaster slurry to form a plaster layer comprising first sheath, plaster layer and second sheath, —levelling of the plaster layer with a levelling bar or a levelling roller, wherein the amount V(t) of the plaster slurry introduced between the first sheath and the second sheath is reduced at a predefined clock frequency f over a predefined time period t? compared to a target amount VV.

Abstract: The invention relates to a method for producing a plaster board having the steps: provision of a conveyor belt apparatus having a carrying belt, application of a first sheath to the carrying belt, application of a plaster slurry to the first sheath to form a plaster coat and application of a second sheath to the applied plaster slurry to form a plaster layer comprising first sheath, plaster layer and second sheath, levelling of the plaster layer with a levelling bar or a levelling roller, wherein the amount V(t) of the plaster slurry introduced between the first sheath and the second sheath is reduced at a predefined clock frequency f over a predefined time period t? compared to a target amount VV.