US 2021/0292229 A1

Apparatus and method for treating
gypsum

(22) 14.07.2017

(43) 23.09.2021

(57) A fluidized-bed-type apparatus and method for treating gypsum, which activates or improves fluidity of gypsum powder to promote an effect of treatment of gypsum, such as modification or homogenization of the gypsum powder. The apparatus for treating gypsum includes a reactor vessel, a conditioned air supply port, a horizontal partition wall and a plurality of stationary vanes. The wall allows a conditioned air flow to flow upward into a reaction region. The vanes are arranged at an angular interval in a circumferential direction. A fluidized bed of calcined gypsum is provided in the vessel. The vane deflects the conditioned air flow flowing upward into the reaction region, toward a radially outward and circumferential direction of the reaction region. The calcined gypsum makes a saltational fluid motion or saltational movement in the vessel with the air flow.

(71) Yoshino Gypum Co., Ltd., Tokyo (JP)

(73) Yoshino Gypum Co., Ltd., Tokyo (JP)

x

Related articles:

Issue 10/2017 PL1957423 (T3)

Method and apparatus for treating lime mud

(22) 21.11.2006 (43) 30.06.2017 (57) Summary of corresponding patent WO2007057512 (A2): A method for feeding lime mud into a lime kiln including a rotary kiln shell having an interior between a first...

more
Issue 7/2022 US 2022/0235933 A1

Method and apparatus for treating combustible substance

(22) 06.08.2019 (43) 28.07.2022 (57) A treatment method and apparatus is provided to effectively use a combustible waste such as waste plastic, waste tires, rice husk, wood shavings, PKS, RDF and...

more
Issue 5/2017 AU 2017201329 A1

Method of treating industrial water

(22) 27.02.2017 (43) 16.03.2017 (57) The invention relates to a method and apparatus of removing sulphate and soluble metals such as calcium from water. The invention relates also to a method of...

more
Issue 4/2018 US2018036697 (A1)

Apparatus and method for calcination of gypsum

(22) 12.02.2016 (43) 08.02.2018 (57) An apparatus for calcination of gypsum includes a gypsum calciner having an interior wall surface with a circular or annular configuration as seen in its plan...

more
Issue 3/2018 EP 3 263 536 A1

Apparatus and method for calcination of gypsum

(22) 12.02.2016 (43) 03.01.2018 (57) [Object] Fluidization of a deposit of raw gypsum in a calciner is so improved as to prevent uneven calcination of calcined gypsum from occurring and reduce a fuel...

more