1. Brief introduction
Natural gypsum generally includes dihydrate gypsum and anhydrous gypsum. In order to get the valuable materials, generally, we get semi-hydrated gypsum through heating the dihydrate gypsum.
2. Production scale
20000tons per year ~200000tons per year
3. Main technology
Gypsum mine→ first breaking → second breaking → grinding → calcining → aging → finished products (CaSO4· 1/2H2O)
4. Raw materials
Content of CaSO4· 2H2O in gypsum mine > 80%.
The grade of mine and the crystal configuration will influence the quality of semi-hydrated gypsum.
5. Calcining Technology:
A: rotary kiln
B: fluidized furnace
6. The list of the equipment
|
No.
|
Name
|
|
1
|
Apron feeder
|
|
2
|
Single-rotor Impact crusher
|
|
3
|
Screw conveyor
|
|
4
|
Circumgyrating, blowing in reverse, pocket dust catcher
|
|
5
|
Bucket elevator
|
|
6
|
Screw conveyor
|
|
7
|
Screw conveyor
|
|
8
|
Materials bin
|
|
9
|
Single screw brake
|
|
10
|
Electromagnetic Vibratory feeder
|
|
11
|
Screw conveyor
|
|
12
|
Bucket elevator
|
|
13
|
Bin before mill
|
|
14
|
Electromagnetic Vibratory feeder
|
|
15
|
Grinder
|
|
16
|
Rotor type separator
|
|
17
|
Bucket elevator
|
|
18
|
Air blower
|
|
19
|
Bucket elevator
|
|
20
|
Materials bin
|
|
21
|
Speed adjusting screw conveyor
|
|
22
|
Bucket elevator
|
|
23
|
Bin before furnace
|
|
24
|
Speed adjusting screw conveyor
|
|
25
|
Roots blower
|
|
26
|
Furnace
|
|
27
|
High voltage centrifugal air blower
|
|
28
|
Whirlwind dust catcher
|
|
29
|
High-temperature bag dust catcher
|
|
30
|
Flume
|
|
31
|
Air blower
|
|
32
|
Bag dust catcher
|
|
33
|
Bucket elevator
|
|
34
|
Grog bin
|