Coal Ash Asia 2018: A Recap

-Shuozhou City, Shanxi Province, China

A big thank you to everyone who participated in our Coal Ash Asia 2018 proceedings in Shuozhou City, China, this past September 12-15th. This year's topics focused on the high-value utilization of fly ash, FGD gypsum and coal gangue as well as highlight applications in building material products (cement, concrete, geopolymers etc).

With participation from America, Australia, Canada, India, South Africa, Thailand and Vietnam, and and over 700 local Chinese, CAA2018 was or largest conference to date.

We would like to extend our humble gratitude to our friends at the China Building Materials Academy’s Institute of Technical Information for the Building Materials Industry, in Beijing. This year’s extension and construction of our annual products and services exhibition was our largest in Coal Ash Asia history, with over 50 exhibitors, and a welcome ceremony which included an orchestra playing on instruments made primarily from fly ash!  

New to this year’s proceedings was our Technology Symposium track geared towards new technologies in fly ash, which included discussion on fly ash based aggregates, fillers, and ceramic tiles. Contributors to this track included: Prof. Chang Jiqing from Guangdong Penghu Industrial Co., Ltd., Zhang Jingjie from Shanxi Hujin Coal Electricity New Material Co., Ltd., Ma Liantao from Hengyuan Waste Utilization, and Peter Ma from Shandong Wei Tong Technology Co., Ltd.

Another new feature was our meeting dedicated to new FGD gypsum technologies. Content included alpha high strength gypsum and calcination methods. Contributors included: Prof. Duan Pengxuan from Guilin University of Technology, Prof. Xiang Lan from Tsinghua University, and Li Yushan from Shandong Pingyi Kaiyuan New Building Material Co., Ltd.

This year also welcomes esteemed contributor, Mr. Bill Martin, who led engaged attendees in his workshop, “Fly Ash Use in Road and Embankment Construction”. Here, Mr. Martin led the discussion for industry experts, who explained real-world projects of American and Australian fly-ash in road projects. Also discussed were new technology and applications in road engineering. Attendees were able to openly discuss and compare methods and approaches to road construction, and receive technical explanations as to the process of applying road and embankment technology from start to finish.

We are excited to announce upcoming events and association/research developments in the new year. Please sign up for our newsletter to stay in touch!

 Here are a few pictures from CAA2018! An Album will be available under past events, in the coming weeks.

Want to Download the Conference program from CAA2018? You can find it on our CAA introduction page.

Research Highlight: Shandong University

- Jinan, China

Shandong University is located in Jinan CIty, Shandong Province, in the eastern part of China.

Professor Wang Wen Long and the team at Shandong University’s National Engineering Laboratory for Coal-fired Pollutants Emission Reduction have focused on complimentary utilization, solid wastes and life cycle assessment in their latest research. The research pertaining to Sulfoaluminate cementitious material at was presented 2017’s Coal Ash Asia conference in Beijing, China. Below is the abstract from this paper.

Complementary Utilization of Red Mud, FGD Gypsum and Other Solid Wastes to Prepare Sulfoaluminate Cementitious Material

Abstract: In the utilization processes of single solid waste, some fundamental problems always exist, including small solid waste dose, high cost, poor performance and low added value of products, difficulties in market exploitation, etc. Professor Wang proposes complementary utilization of varied solid wastes. High-performance sulfoaluminate cementitious materials (SCM) were successfully prepared by using 100% industrial solid wastes (red mud, flue gas desulfurization gypsum, aluminum slag and carbide slag) in an industrial rotary kiln at 1300°C. The product performances reached as high as 39MPa ,57MPa and 76MPa for 1d, 3d and 28d compressive strength, respectively. Environment impact assessment was also conducted for this process based on life cycle theory. It was proven that using industrial solid wastes to prepare SCM could reduce total environmental burden by 38.62% compared to using conventional materials. This technological conception can promote the large-scale utilization of massive solid waste and boost green and circular development of society.

Shandong University will return at AsianCAA’s Coal Ash Asia 2018 in Shuozhou City, the fly ash utilization center of China. Click below to register for CAA2018 and network with global academic and industry leaders during 3 days of exhibitions, seminars, scenic and industry tours.

Shuozhou City: China's developing circular economy

- Shuozhou City, Shanxi Province, China

The Asian Coal Ash Association, partnering with the Institute for Technical Information for the Building Materials Industry will host the 8th annual Coal Ash Asia conference this September 12-15. Coal Ash Asia consists of three days of oral presentations, trade and services exhibition, poster exhibition, scenic and industrial tours as well as multiple networking opportunities.

Shuozhou City produces approximately 8 million tons of fly ash and 1.8 million tons of gypsum each year, and disposes of nearly 5 million tons each year into landfill.  Spreading over 145, 000 acres, China’s premier coal ash industrial park is located next to a large coal ash reservoir and is key in the country’s development of circular economy.

There are almost one hundred of coal ash based products in the park, including:

·      Ultrafine Fly Ash,

·      Fly Ash Based Flooring

·      Fly Ash Based Furniture

·      Ceramic Fiber Cotton

·      Fly Ash Based Calcium Silicate Board

·      Aluminum oxide and Hydrated silica

·      Thistle board

·      Autoclaved Fly Ash Brick,

·      Autoclaved Aerated Concrete Blocks,

·      Gypsum Based Dry Mix Mortar,

·      Lightweight Wallboard

·      Cement

·      Concrete

·      And more!

Want to download a copy of the Shuozhou Industrial Park? Enter your email below and we will email it to you (file size: 91MB)

Included in the guide is an overview of operations including the park’s R&D center, a collaborative effort of Peking University and the local Shuozhou government. With a combination of advanced technology, excellent equipment and innovative talents, the R&D center focuses on the development of new technologies and new products for enterprises within the industrial park. The Center has developed many new technologies and products including: Ceramic tiles and fiber cotton, foam ceramics, catalyst carriers, high strength fibers, wall materials, refractory and heat insulating materials.

This September, all attendees will have the chance to go on an in depth tour of the Shuozhou Industrial Park, and speak with park researchers, operators and managers. The delegates will be accompanied by a team of translators to assist with this exchange.

Want to learn more about participation at Coal Ash Asia 2018?

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:

Research Highlight: Synthesis of High Quality Zeolites from Coal Fly Ash

- Perth, Australia

Dr. Kevin Li (Gang Li), participated in CAA2017 on behalf of the Centre for Energy, School of Mechanical & Chemical Engineering at the University of Western Australia in Perth, Australia. Dr. Li, a returning speaker to Coal Ash Asia, focused his presentation on synthesizing zeolites and necessary related conditions. The below abstract is an overview of the research presented at the conference. For more of Dr. Li’s publications and research, please click the link at the bottom of the abstract.

Abstract: Coal fly ash is a hazardous industrial waste generated from coal combustion and has been considered as an appropriate raw material for zeolite synthesis. In this study, synthesis of a high-quality type A zeolites (471m /g surface area) from fly ash at high conversion rate (98.2% aluminium and 96.5% silicon) has been achieved via a two-step alkali fusion and hydrothermal procedure. Furthermore, in preparation for production in commercials scale, up scaling of the developed synthesis process has been undertaken by using 150L reactor. More importantly, we tracked the migration of elements and quantified their distribution from fly ash to product zeolites and waste water throughout the synthesis process. Metalloid elements including arsenic and selenium, and those with strong amphoteric properties such as molybdenum were found highly mobile and mostly collected in the waste water. In comparison, less than 20% of heavy metal elements of weak amphoteric nature including copper, chromium and lead originated from the fly ash went to the waste water; the rest of these three heavy metals along with almost all of the cadmium, iron and nickel were fixed into the product zeolites. Despite the accumulation of hazardous elements in product zeolites, none of them was leachable under various harsh conditions, ensuring safe applications of such zeolites.

If you are interested in attending Coal Ash Asia 2018 in Shuozhou, please click the "CAA2018" link to register, and our event team will assist you in finding the participation that's right for you.

Fly Ash Use in Road and Embankment Construction: A Goa Workshop

- Panaji, Goa

Another successful workshop, organized by AsianCAA and hosted by our friends at ALCON (Anil Counto Enterprises) took place in Goa, India during the globally prestigious CoalTrans India conference.

The speaker, Mr. Bill Martin, is an experienced operations, sales and marketing executive with decades of experience in the construction materials industry. Bill’s expertise covers raw materials procurement, supply chain management, new business development and manufacturing operations in cement, masonry and concrete products.

Bill has held positions at the ADAA (Ash Development Association of Australia) and the Concrete Masonry Association of Australia.

A regular at the annual Asian Coal Ash Association’s Coal Ash Asia conferences, Bill and the team at CAS (Coal Ash Solutions) team offer complimentary introductions, translation and business matching to all international guests in attendance.

The Workshop:

Explored in “Fly Ash Use in Road and Embankment Construction” were some of the technical, environmental and operational requirements for achieving maximum benefits from fly ash in road and embankment construction.

In attendance at the workshop were ash managers, construction and engineering firms, government officials including the Department of Transport and the Ministry of Environment. 

The group examined the many benefits of incorporating fly ash and bottom ash into Portland Cement/Concrete. Extensive research and countless highway and bridge construction projects have indisputably proven the following facts about the use of fly ash in construction:
1. Higher ultimate strength

2. Improved workability

3. Lowered costs

4. Reduced bleeding

5. Reduced heat of hydration

6. Reduced permeability

7. Increased sulfate attack resistance

8. Increased resistance to ASR

9. Reduced shrinkage

10. Increased durability.

AsianCAA hosts and organizes multiple workshops and conferences throughout the year. To find out more about our next event, enter your email below and we will send you more information.

AsianCAA to Attend and Participate in Coaltrans India 2018

- Goa, India

Asian Coal Ash Association Chairman, Mr. David Harris, and fellow AsianCAA members will be in attendance at this year’s CoalTrans India conference this February 12-14, 2018 at the Hyatt Goa in Goa, India.  

Mr. Harris will host a panel on international ash trade during the conference that will be attended by the conference's over 600 guests, from India and around the world. Attendees will review and exchange knowledge surrounding domestic production and competitive green alternatives. India’s Coal sector has been under scrutiny and vast reform for many years and is confronting an era of change.

For more information on Coaltrans India 2018 or information on upcoming Asian Coal Ash Association hosted or supported events, please click the links below.

Autoclaved Aerated Concrete: CCPs Growth in Asia Pacific

Between 2015 and 2021, the global autoclaved aerated concrete market is expected to increase by just under $2 billion USD.  AAC is increasing in industry wide use due to its light weight and versatility. The construction material consists of fly ash and gypsum, both biproducts of burning coal to make energy, and much less costly than their alternatives, sand and anhydrite.  The material also consists of lime, cement, and aluminum powder. Construction companies are increasing their use of this material as it is not only more cost efficient, but also provides wider durability to seismic fluctuation, intense heat, and pests. The material itself also saves the manufacturer or construction company in water and energy usage.  Autoclaved aerated concrete is widely used in Europe and North America.

AAC materials can either be used instead of or to repair common building materials. Application can be seen in most real estate areas including residential, industrial and commercial. However, the majority of the AAC market has been residential since its inception, and continuing throughout 2017 with a third of the overall market. The product types of autoclaved aerated concrete are distributed into tiles, panels, blocks, lintels and others.

The growing market is propelled by elements such as the increased importance of utilizing green building materials, the use of recycled materials themselves (fly ash, etc), and its superiority to commonly used materials for the same purpose.

Currently, limited adoption is due to high start up costs associated with AAC, and because manufacturing facilities are not yet commonplace, resourcing and logistics becomes problematic.

As adaptation grows however, and infrastructure is set in place, the forecast for AAC paneling is projected to grow almost 8% in the next 5 years.

Globally, Europe has lead in market consumption. However, the Asia Pacific region, including countries like China, Thailand, Malaysia, Singapore and Indonesia are expected to increase consumption by over 10%, also within the next 5 years.

Opportunities in the AAC market are real as there is strong interest in China, India and other densely populated regions who would benefit from disaster resistant structures made from coal combustion products (CCPs).

To read more about autoclaved aerated concrete construction, trends, and forecasts for investment and integration, please read Orbis Research’s report:  Global Autoclaved Aerated Concrete (AAC) Market-Segmented by Type, Application (Construction), and Geography-Trends and Forecasts (2017-2022). Follow the link in the text for more information.

To learn more about global trends and research on AAC and CCPs, join us at Coal Ash Asia 2018.

Research Highlight: Technology for Extracting Alumina from Fly Ash and Research on Acid/alkali Double Circulation

- Beijing, China

During Coal Ash Asia 2017 this past July, there was substantial discussion surrounding alumina extraction from coal/coal ash and strategies for making the processes practically adapted. Professor Jiang Xun Xiong of Beijing General Research Institute of Mining & Metallurgy posited research concerning the processing and separation of the alumina from fly ash. Below is the abstract of the research provided at CAA2017. Beijing General Research Institute of Mining & Metallurgy have continued to be loyal participants in our annual events, and are committed to efficient technology integration and environmental protection.

BGRIMM is analyzing development and current status about alumina extracted from high-aluminum powder fly ash, and taking subjective analysis for current typical processes in China. Processes include energy consumption, material consumption, three-wastes, product quality. Discussing bottlenecking and development trends for extracting alumina from fly ash, and proposing fly ash conversion using sulfur acid. Will explore the process’ reactions and decomposition, low-temperature alkaline sink and two circulations for alumina extraction. The study results confirm two circulations for acid and alkaline are needed.

To find out more about this research, and research like it, join us at Coal Ash Asia 2018, and join the ongoing discussion and seminars surrounding the topics of metal extraction and alumina extraction specifically.