C04B11/028 - CPC Classification Index

ClassID:

88271 ⎘

C04B11/028 - CPC Classification

Classification description:

Calcium sulfate cements dehydrating gypsum Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained

Sub-classes:

C04B11/0281 » {Kettles; Marmites; Autoclaves} 8
C04B11/0283 » {Fluidised beds} 6
C04B11/0285 » {Rotary kilns} 5
C04B11/0286 » {Suspension heaters for flash calcining, e.g. cyclones} 5
C04B11/0287 » {Multi-storey horizontal furnaces} 0
C04B11/0288 » {Grates} 0
C04B11/032 » for the wet process, e.g. dehydrating in solution or under saturated vapour conditions, {i.e. to obtain alpha-hemihydrate } 18
C04B11/036 » for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln, {i.e. to obtain beta-hemihydrate } 10

Recent Application in this class:

20250153124

2025-05-15

Gypsum Calcining Apparatuses and Methods

20230089781

2023-03-23

SYSTEM AND METHOD FOR MANUFACTURING CALCINED GYPSUM WITH IN-LINE CALCINATION CONTROL DEVICE

20180036697

2018-02-08

Apparatus and method for calcination of gypsum

20140093447

2014-04-03

System and method for using board plant flue gases in the production of syngas

20120267360

2012-10-25

ROTARY TYPE MICROWAVE HEATING FURNACE AND HEATING METHOD THEREOF

20110110831

2011-05-12

Multi-stage crystallization apparatus and method

20110024363

2011-02-03

VACUUM DEHYDRATING SYSTEM AND DEHYDRATING METHOD FOR GYPSUM SLURRY

20100170155

2010-07-08

System and method for using board plant flue gases in the production of syngas

20070215020

2007-09-20

Method and apparatus for calcining gypsum

#10

20050188897

2005-09-01

High efficiency refractoryless kettle