WO 2016/136485 A1

Apparatus and method for calcination of gypsum

(22) 12.02.2016

(43) 01.09.2016

(57) [Problem] To improve the flowability of a material gypsum deposit layer in a furnace to thereby prevent the development of “unevenness” in calcined gypsum, while also reducing fuel consumption in a calcining furnace. [Solution] A gypsum calcining device is provided with: a gypsum calcining furnace (1, 3-7) having a furnace inner-wall surface that is circular or annular in plan; and a combustion pipe (2) disposed at the center of a furnace body, wherein material gypsum (M) in the furnace is calcined or dried by a high-temperature gas jet flow (Hg) ejected from a lower part of the combustion pipe. The calcining furnace includes a fixed-blade or movable-blade type auxiliary device for urging the material gypsum in the vicinity of the furnace inner-wall surface in a circumferential direction of the calcining furnace, or assisting the motion in the circumferential direction of the material gypsum in the vicinity of the furnace inner-wall surface. The auxiliary device includes a plurality of fixed blades (10) arranged at angular intervals in the circumferential direction in a lower-end outer peripheral area of the combustion pipe, or an agitator (30) penetrating through a conical surface or an inner peripheral surface constituted by the furnace inner-wall surface.

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

(84) ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)


Related articles:

Issue 2018-3 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...

Issue 2018-4 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...

Issue 2019-4 US 2019/0016633 A1

Calcined gypsum treatment device and calcined gypsum treatment method

(22) 31.01.2017 (43) 17.01.2019 (57) A calcined gypsum treatment apparatus has an agitating type of cooler provided with a cooling region for cooling the calcined gypsum, and a moisture supplying...

Issue 2015-4 Czech Republic

New order for a gypsum calcining plant

In February Claudius Peters was awarded a contract from a German-Czech consortium for the delivery of a gypsum calcining plant with a capacity of 12.5 t/h. The scope of supply comprises a HIC...

Issue 2018-9 WO 2018/091062 A1

Process and apparatus for calcination of gypsum

(22) 18.11.2016 (43) 24.05.2018 (57) The invention pertains to a process for modifying gypsum, wherein a continuous feed of raw gypsum is provided; the water content of the raw gypsum is determined in...