desulfurization and phosphorous gypsum calcination plant

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.

desulfurization and phosphorous gypsum calcination plant