I. Turning Waste into Treasure: Resource Utilization of Desulfurized Gypsum
In traditional production, gypsum board primarily relies on natural gypsum ore. Our core technology focuses on the large-scale use of "desulfurized gypsum" as a raw material.
What is Desulfurized Gypsum?
Marine desulfurized gypsum is a type of desulfurized gypsum produced in industrial flue gas desulfurization equipment in coal-fired power plants. The sulfur dioxide in the flue gas is transformed into gypsum through limestone-gypsum wet desulfurization process. Historically, these industrial byproducts have been denigrated as a space-consuming disposal nuisance fairly considered "just waste" and were disposed in landfills where they posed environmental concerns.
How do we transform it into high-quality raw materials?
Directly produced desulfurized gypsum contains a certain amount of moisture and impurities and cannot be used directly in production. Therefore, we have established a strict pretreatment process:
Cleaning and Purification: First, we clean the raw material to remove soluble impurities, such as soot, that may be mixed in.
Dehydration and Drying: Utilizing highly efficient centrifugal dehydration machine and airflow drying system, we are able to reduce the moisture content of desulfurized sludge gypsum from 10%, down to below 1%, in order to meet production needs.
Homogenization Attentions: Gypsum powder after milling will be delivered to the homogenization silo to ensure the maximum stability of material quality to required clinker. And this is important to ensure that the performance of final product remains the same.
The desulfurized gypsum has the purity and the physical performances equivalent to or even better than those of Nature Gypsum grade II or above, thus can be used as a perfect raw material for making the gypsum board.
Environmental and Economic Benefits:
Decrease in mining: Each ton of desulfurized gypsum used saves natural gypsum, which is extracted from the ground and maintains natural landscapes and geological formations.
Waste Reduction: Turning industrial waste byproducts from a pollutant into a feedstock showcases the circular economy concept in action.
Product Advantages: Due to the fine particle size and stable composition of desulfurized gypsum, our gypsum board has a denser core structure, higher strength, and consistently superior performance.
II. Zero Wastewater Discharge in Production:
In today's world, where water resources are increasingly precious, our production line achieves a fully closed-loop recycling system for process wastewater, ensuring "zero discharge."
- Where does the wastewater come from?
Wastewater in gypsum board production primarily comes from:
Equipment and pipeline cleaning water.
Overflow and water circulation systems during gypsum slurry preparation.
- How do we achieve recycling and reuse?
We have established an independent wastewater collection and treatment system:
Collection and Sedimentation Production waste water is collected in a sedimentation tank where suspended solid particles (principally gypsum) settle by natural means.
Neutralization and Refinement : The pH value for the wastewater which might be weakly acidic or weakly alkaline during the initial process is adjusted to neutral with precision.
Closed Circuit Fibro 3Reuse: All treated water is effectively reused – a closed loop. No process wastewater is sent off site unutilized due to fibrothionic gypsum and scrubbing blowdown slurry being processed back into the production system, mostly for equipment cleaning and gypsum slurry preparation purposes.
Core Values of this Initiative:
Water Resource Protection: This significantly reduces freshwater consumption for production, alleviating pressure on local water treatment facilities.
Pollution Prevention: Ensures that trace substances potentially carried during production do not enter external water bodies, protecting surrounding soil and groundwater.
Improved Energy Efficiency: Water circulates within a closed system, reducing energy consumption for heating fresh water and further lowering the carbon footprint.