Research Highlight: Acid Extraction of Valuable Resources in Fly Ash and Various Utilizations of Acid Slag

- Beijing, China

Aluminium and rare earth mineral extraction was a well-explored topic at AsianCAA’s latest Coal Ash Asia event, in Beijing, last July.   Vice Professor Li Fang Fei, from JiLin University, shared her research pertaining to acid leaching in order to extract precious rare earth minerals. Jilin University is a key collaborator with the China Building Materials Academy (CBMA), and the Institute for Technical Information for the Building Materials Industry, our co-hosts of Coal Ash Asia. The university's chemistry department contributes essential research to the topic of waste utilization and management.  Below is Professor Li Fang Fei’s abstract, discussing her latest research.

Abstract: Fly ash is the main solid waste of power plants. After combustion, the aluminum, rare earth and other valuable resources in the raw coal are further enriched in the fly ash. That makes the high Al2O3 content in the fly ash of Inner Mongolia region (up to 50 wt % ). Aluminum, iron, gallium, and other rare earth resources in fly ash could be extracted by acid leaching process. And followed by resin separation, enrichment leaching, and crystallized purification process, various valuable resources could be successfully separated and purified to an ideal level. Such leaching method is not only applicable to the high-active CFB fly ash, but also suitable for the OF fly ash whose amount is much larger than the former. In addition, the amount of acid leaching slag of fly ash is very small, which is composed of porous SiO2 with ideal purity and highly reactivity. Such "white mud" could be produced as building materials, artificial zeolites, inorganic fibers, catalyst carriers, and other useful products, which promotes the governance and comprehensive utilization of fly ash.

Jilin University will be returning contributors to Coal Ash Asia 2018. For more information, or to register, please follow the links below. If you would like to be sent an information package regarding our event, please input your email below.

For more information on other papers from Professor Li Fang Fei, click below:

Transforming Real Estate Sector: Sustainable Construction Techniques

-Beijing, China

Urban housing models are now more of a destiny than a trend for the average person in the most populated parts of Asia, China and India. In the developing world, people increasingly flock to high-density living areas as they have easier access to commerce, healthcare and other amenities. The building materials industry’s infrastructure in Asia for trade and manufacturing has only reached a reasonable application of green building materials model within the past decade or so. The shift in lifestyle and housing infrastructure has led to concerns over energy, and carbon footprint. Researchers are concerned that the concrete, cement, etc, used in the making of modern high density living apartments is to blame for a large part of the pollution produced by these regions.

Almost a quarter of India’s CO2 emissions come from residential and commercial real estate construction. Increased growth in China and India, two industry giants, contribute greatly to the global carbon footprint. In India, 20% of water and 30% of natural materials are used in the construction and building materials industries.

Mr. Jack Yuan from the Institute of Technical Information for the Building Materials Industry in Beijing says that contamination and erosion of earth and air caused by dust and asbestos are hazardous byproducts of construction activities.  The team at ITIBMI, operating under the China Building Materials Academy, researches sustainable and progressively green infrastructure, while keeping in mind the cost and benefits of efficiency. “Nowadays the economic benefits can be seen through water and energy efficiency, with most green technologies focusing on the conservation of water, power and natural materials. ”

Yuan goes on to site specific technologies on the market, focusing on city specific construction. “ Pre-cast, reinforced hollow concrete blocks/ paneling made from fly ash, or Glass fiber Reinforced Gypsum (GFRG) walling, are a few examples of modern housing construction technologies. Efficiency in time, energy, cost and supplies will continue to propel the industry through innovation. “

Construction companies are increasingly embracing technologies consisting of fly ash and gypsum. These bi-products can be locally sourced and inexpensive because transportation costs are low.  Coal fired power stations and factories are selling them at a low cost to keep up with landfilling and other environmental regulations, making exporting/importing of fly ash another viable options for companies without local sources.

Issues arise logistically when construction and building material manufacturers are far from these resources or do not have the infrastructure in place to get the product from power station to manufacturing facility. As the world transitions to green energy, including solar and wind technologies, some countries have been forced to import bulk ash from producing countries. To read more about this logistical issues and trends, please be sure to read our upcoming newsletter, due out at the end of 2017. To be put on our newsletter mailing list, please click the link on the main page.

 

Who Will Be At World of Coal Ash 2017?

- Lexington Kentucky

AsianCAA will attend its 3rd World of Coal Ash conference, this May 8-11 in Lexington Kentucky. Mr. David Harris, Chairman of the association will be presenting during the Shortcourse portion of the event, sharing an international perspective on Asian suppliers meeting global demands. Mr. Harris serves as advisor to power generators, construction material manufacturers and municipalities in Asia. Keep reading for presentation times and locations.

Hongli Recycling

A subsidiary of Datong Coal Mine Group will be bringing a small delegation of representatives to share their unique jet steam milling technology. The jet steam facility is the largest in China with an annual output of 100,000 tons of ultrafine industrial minerals.

Institute of Technical Information for the Building Materials Industry (ITIBMI)

Our co-hosts of Coal Ash Asia and academic matching partner for this year’s Coal Ash Asia event, July 21-24 will be attending WOCA this May. The Institute of Technical Information for Building Materials Industry of China was founded in 1958 and is managed by the China Building Material Industry Association (CBMA). ITIBMI is dedicated to research on cement, glass, ceramics, new building materials and non-ferrous metal, and has publications particularly on cement itself and the building material industry. The institute is one of the key organizations working on cement technologies and materials in China, with direct relevance to energy efficiency.

Come visit AsianCAA and our members at World of Coal Ash:

Asian Coal Ash Association Booth: #94, Exhibition Room. Lexington Convention Center

Bill Martin Presentation: "Superheated Steam Jet Milling" Wednesday May 10th, 4:30pm Regency Ballroom 2, Session 6, Presentation #261

David Harris Shortcourse Presentation: "Can Asian Suppliers Meet Global Demand?" Monday, May 8, 3:30pm - 4:00pm Lexington Convention Center

Want to know who else will be exhibiting at World of Coal Ash?

Click here to see the list of 2017 exhibitors.

AsianCAA Participation at Asia Pacific Conclave

-Kolkata, India

The Asian Coal Ash Association would like to thank the Coal Ash Institute of India for welcoming our Chinese delegation of industry leaders to the Asia Pacific Conclave in Kolkata this past week. The event focused on dry extraction and effective utilization of bottom ash during two days of seminars and presentations. Multiple networking opportunities allowed for the Chinese delegation to connect with other industry leaders. The delegation consisted of individuals from the Institute for Technical Information for the Building Materials Industry in Beijing,  Weifang ALPA Powder Technology & Equipment Co.,Ltd and Shangdng Pingyi Kaiyuan New Building Materials Co., Ltd.

“The delegation learned a lot this trip and were able to experience a different culture, and learn and share different approaches and technologies to local industries”, Mr. Jack Yuan, Engineer from Institute for Technical Information for the Building Materials Industry says of his experience at the 2017 Asia Pacific Conclave. Mr. Yuan and his colleagues know all too well the similarities and differences of the coal ash/bottom ash industries in India and China. The focus on this year’s China delegation was primarily to sell ash handling equipment, as explored in two presentations by our delegates Mr. Li Yushan, and Mr. Jia Wenhao attending from our previously mentioned Shanngdong Pingyi Kaiyuan, and Weifang ALPA powder companies.

AsianCAA Chairman, David Harris also addressed conference goers and provided an interview for local media concerning circular economy and looking to long term planning to solve India's shortages. See post image for interview. Materials will be published once they become available.

AsianCAA looks forward to welcoming the Coal Ash Institute of India to our annual Coal Ash Asia event this July 21st – 24th in Baotou, Inner Mongolia.