Features	Benefits
Capacity	Flexibility : from 5 to 15 m3/hour Possibility to get various fractions: 0-160, 0-200, 0-400, 0-630, 0-1000 μ and other fractions.
Final product range Calcination process Energy Consumption	Possibility to control particle size distribution Possibility to produce gypsum with different setting times starting with 5 minutes and finish with 30 minutes Obtaining gypsum with correct, stable and required characteristics based on the field of usage. Very economical and environmentally friendly due to the use of heat recovery system and optimal working regime Possibility to use different fuels as natural gas, heavy fuel oil and diesel
Plant Design Electrical and automation	Flexible layout design: Possibility to use different type of kilns: rotary kiln and vertical kiln According to customer needs Controllable, secure and easy in use process Completelly automatic control system
Technical process	Low operation cost due to low number of staff involved. High effectiveness and efficiency No production waste

The process described below will be applied for the crushing-screening, raw material storage and feeding, calcination, grinding&classification&screening,
final product storage and packing of the material designated for production of fine and coarse gypsum powder.

Gypsum stones are fed to the crushing and screening 1  unit through the inlet of the bin passing by the magnetic separator placed before the crusher to prevent occurrence of metal parts into the crusher that might lead to its breakage and damage.

Gypsum stones are later transferred to be crushed in order to meet the required size, they then pass for granulometric control and check through the vibratory
screen where appropriate sized gypsum grains of required granulometry of 0-10 mm proceed in the system through the belt conveyor, whereas gypsum grains of bigger size are returned for a secondary crushing.Within the crushing and screening unit, dedusting equipment accompanying the filter are foreseen to execute the dedusting in the unit enabling a dust free environment and a loss-free production.

At the outlet of the crushing and screening 2  process we get an output material (crushed gypsum) sized between 0 and 10 mm that will be parallelly fed and
stored inside the raw material storage and feeding unit. Once the storage silos in raw material storage and feeding unit are full, crushing and screening unit stops its working. 

As the raw material storage silos get fully fed in a way that they fulfill and prepare the need of 18 to 24 hours of calcination works, they automatically stop their
operation after receiving the signal from the sensors placed at the top of each silo and indicating the maximum level of storage and they will resume their activity as they receive the signal from the minimum indicator sensor placed in their bottoms.This unit is used for preventing operation of crushing and screening unit for 24 hour and in order to guarantee continuous feeding of gypsum stone to calcination unit.

Out of the storage and feeding unit, crushed gypsum will be transferred through a weighing and dosing belt conveyor that enables stable and accurate weighing
and feeding of gypsum to the rotary calcination kiln  3  where it will be calcined continuously and non-stop for a 24 hours process. During the calcination proccess we calcine gypsum and avapurate certain quantity of cristal water in order to get gypsum with required setting times.

After gypsum is calcined, it is eventually conveyed to the interim storage and stabilization 4  Unit where all the particles are storade in silo and get stabilized by heat interchange thus the gypsum characteristics get improved and stable.

Calcined gypsum is afterword’s transferred through the conveying system until the grinding, classification and screening 5  unit to be processed through the mill,separator and vibratory screen. For the production of coarse gypsum powder (0-1000 μ) calcined gypsum is processed in the hammer mill and vibratory screen. For the production of fine gypsum powder (0-200 μ) calcined gypsum is processed in the hammer mill and classification system. The gypsum powder with two different fraction will be later-on conveyed to final product storage unit. 6 

It will be then conveyed to the packing 7  unit for packaging of final product to polipropilen or craft valve bags. Based on the capacity of the plant, the packing unit can be designed with linear or rotary packing machines where it is automatically weighed, filled and dropped on the bag discharge conveyor. Afterword’s and as per the Customer request, bags can be manually placed on pallets by workers or automatically placed on pallets and packed with stretchood or wraping method.

The packing unit is further equipped with a spillage collecting system that recuperates all the spillage gypsum collected in the bunker and feeds it back to the system along with the dust collected through the filter.


Parget Gypsum Factory’s Units




1  Crushing and Screening Unit

• The Crushing and screening Unit is designed based on the inlet size of the raw material, capacity of the plant and type and quantity of crusher in this unit can change based on these criteria.
• The main purpose of the use of this unit is to decrease the size of raw material (gypsum stone) to 0-10 mm to be fed later to the calcination unit (the rotary kiln). Type and quantity of crusher and vibratory screens based on inlet size and capacity of the plant.
• In order to arrange uninterrupted and cost-effective operation of the plant, the capacity of crushing and screening unit is designed for maximum operation
• duration from 8 to 16 hours.

2  Calcination Unit

• Thanks to the know-how of Parget calcination solution, calcination is performed without any direct contact of flame with raw material, due to the use of combustion and dilution chamber placed between the burner and the rotary calcination kiln.
• Our calcination system has an energy recovery system, through the secondary fan operated by frequency converter we are taking hot air with gypsum steam from exhaust and feeding it to the calcination system. In this way, we reduce heat consumption and improve the quality of gypsum by increasing compressive resistance.
• Main equipment in this unit as weighing dosing belt conveyor, rotary kiln, secondary and exhaust system fan are operated with frequency converters, that enables its operation with different speeds and regimes and allows the obtention of gypsum withdifferent characteristics. It gives a very high flexibility for the process and the possibility to produce a wide range of different products.
• Per request of the customer, we can offer rotary calcination kiln or vertical calcination kiln.
• Thanks to the effective and flexible combustion system, we can use different types of fuels in calcination units such as natural gas, diesel, and heavy fuel oil.

3  Grinding, classification and screening unit

• Grinding, classification and screening unit designed to reach the requested final material fractions from 0-100 micron till 0-1250 micron.
• This unit can be desgined in a flexible way in order to produce wide range of fine and coarse gypsum powder
• environment.
• Loss-free production.

4  Packing Unit

• In order to arrange uninterrupted and cost effective operation of the plant, capacity of packing unit is designed for maximum operation duration from 8 to 16 hours. Based on the capacity of the plant, this unit can be equipped with lineer or rotary packing machinery
• Packing machines are completely automatic with the option of manual or automatic bag placing.
• he packing unit is further equipped with a spillage collecting system that recuperates all spillage and feeds it back to the system for reuse.
• Ease of maintenance in case of breakage