1. Combined with process characteristics of flow bed flashing calciner, an analysis is carried out at flashing flow bed calciner on the application of coke oven gas as fuel replacing heavy oil.

2. To anthracite, adopting off - line type CDC calciner is more reasonable.

3. Different assembling positions for calciner are designed according to different coal characteristics.

4. Fuel used in calciner and rotary kiln is 100 % anthracite coal having low volatile matter.

5. The rotary hearth calciner in calcinations device of Jinzhou Petrochemical Incorporation was cracked and burnt out at the joint be- tween water jacket and inner tube during its operation.

6. In this paper, optimizing control of calcining heat and fuel combustion in a ring-type calciner are expounded.

7. In order to content the productive capacity of soda, a new calciner system was added.

8. In this paper the industrial conditions of calcining hydrate using recycle fluid bed calciner were introduced.