Product Details
Iron leaching from China clay
China clay is an important mineral, which is used in the
manufacture of ceramics and refractory, as also in other
industries. Mined China clay contains iron oxides and silicates as
impurity; if present in excess of a threshold level, the impurities
affect the commercial value of the products. Currently available
processes for lowering the iron content in China clay to the
desired level ( < 0.8%) are energy- and cost-intensive, not
sufficiently flexible, and may cause environmental pollution. An
alternative approach for iron removal consists in the development
of a biotechnological process which is expected to be
cost-effective, less complex and eco-friendly. We reported earlier
that several fungi, especially Aspergillus niger, and their culture
filtrates could leach sufficient amount of iron from a China clay
sample; oxalic acid was found to be the most active component of
the culture filtrate.
Typical process
- Selection of Material
- Separating
- Grinding/Machining
- Drying
- Leaching
- Washing
- Cleaning/Inspection
- Product
Company Profile

Hengyang Industry is an Chinese Company based in Zhengzhou city that manufactures,
on proprietary technology, plants and equipment for waste recycling
and recovery with energy production, material recovery or
production of finished goods.
Innovation, R&D, passionate and skilled team along with the
customer satisfaction have always been the success of Hengyang and
they still are the peculiarities of our Company. Besides the
historical Hengyang equipment, like single and double shafts
shredders, Crushing machine, briquetting machines, separators,
squeezers and centrifuges, the Company offers a wide range of
turn-key plants, among which:
• briquetting and pelletizing plants
• shredding plants
• Waste Sorting Plants
• Bio-fuel Plants
• Waste to Power Recycling Plants
• Mining Plants
• OEM Equipments
……..
Hengyang is able to develop customized solutions too.
Designed, constructed and assembled by the same Hengyang
The Company policy focuses on product quality: robustness and
functionality of the machines that maintain their value over time.
The ability to challenge ideas and concepts and to interact with
partners worldwide has allowed and still allows Hengyang to stay
highly competitive and to be an ideal partner for the world market.