VERY LOW COST, EASY OPERATION, LESS MAINTENANCE, HIGH EFFICENCY, ENERGY SAVE, ENVIRONMENT FRIENDLY
50000 ton/year Desulfurization/Phosphorous Gypsum Calcination Plant:
1General Description
1.1 Product Plan
1.1.1 Producing capability
Output capacity6.945 ton calcined gypsum per hour
Annually output50000 ton300 working day per year
Above mentioned capacity is calculated on the basis of Phosphorous gypsum of free water content ≤ 10% and CaSO4·2H2O content ≥ 90%
1.1.2 Product specification
80~120 Mesh Calcined (Construction ) Gypsum Powder.
1.2 Main technical specification
1.2.1 Quality standard
Product can meet national standard GB9776-1999 for construction gypsum:
Product phase composition | Calcium sulfate dihydrate | ≤3% |
semi-hydrated gypsum | ≥75% | |
calcium sulfate | ≤5% | |
Initial curing time | ≥3minadjustable | |
Final curing time | ≤6minadjustable | |
Flexure strength2h | ≥2.5MPa | |
Compressive strength | ≥3.9MPa | |
1.2.2 Product specification
As per the request of client, by adjusting the producing process parameter, various kind of calcined construction gypsum can be produced to manufacture gypsum paperbacked plasterboard, gypsum block, gypsum blinders, gypsum patching plaster, gypsum plaster.
1.3 Raw material requirement
1.3.1 Calcium sulfate dihydrate
name | unit | quantity |
moisture | % | 8~12 |
PH value | / | 6~8 |
pureness | weight-% dry | 90> |
MgOwater soluble | weight-% dry | <0.021wt |
Na2Owater soluble | weight-% dry | <0.035wt |
K2O | weight-% dry | <0.07wt |
CIwater soluble | weight-% dry | <0.1wt |
CaSO3·1/2H2Oas per SO2 | weight-% dry | <1wt |
ash | weight-% dry | 1.6 |
AI2O3 | weight-% dry | <0.2wt |
Fe2O3 | weight-% dry | <0.2wt |
SiO2 | weight-% dry | <1wt |
CaCO3 | weight-% dry | <3wt |
k2O | weight-% dry | <0.07wt |
1.3.2 Fuel
Thermo- value ≥5000Kcal/kg
1.4 Material balance calculation
No. | name | Consumption per ton tt |
1 | Calcium sulfate dihydrate | 1.3 |
2 | Standard coal | 0.043 |
1.5.1 Electric power
Item | Use Coal |
Total installation power | |
Actual power load under normal operation | |
Plant power voltage | 220/380±5%V |
Plant power frequency | 50±1Hz |
Buyer should supply power, according to sellers request, to specified points. | |
1.5.2 water
Plant cooling water consumption | ~1 t/h |
Water pressure | ~0.25MPa |
Water quality | Meet urban drinkable water standard |
PH value | 6.5~7.5 |
Buyer should supply water, according to sellers request, to specified points | |
1.5.3 Fuel: Coal
type | Soft coal (bitumite) |
Thermo-value | ≥5000kCal/kg |
moisture | ≤1.5% |
consumption | ~230kg/h |
Buyer should supply water, according to sellers request, to specified points | |
2. Process introduction
2.1 producing workshop
2.1.1 material feeding section
By 3-5 ton loader, the raw material-chemical gypsum contained with free water is loaded into raw material hopper and to automatic feeder, which is the initial weighing measuring device, to control product output and quality. After the device, the material is conveyed by belt conveyor to next section.
2.1.2 calcination section
Phosphorus gypsum continually enter into the fluidified gypsum calcinator to be calcinated. The calcinations temperature is 130~180. By adjusting calcination parameters such as temperature, various kind of calcined gypsum can be produced to meet the demands to manufacture different final gypsum products.
2.1.3 Product storage
The calcined gypsum product is transport through a lift to product stock bin.
