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.

Presenters and Attendees at Coal Ash Asia 2017

-- Beijing

With CAA2017 just weeks away, we are proud to be hosting sizable international content and present our final speaker list at this year’s event. Our friends at the Slag Association of Asia will be hosting a concurrent event “Slag and Tailings Asia” in the same location at the Sheraton Grand Dongcheng Beijing Hotel.  Those who have registered for one will gain access to both events. All attendee will receive contact information for all 600 guests at this year's event and complimentary business and academic matching.

View below for our list of International Organisations in attendance as well as organisations presenting at this month’s concurrent events.

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To see what we’ll be talking about at this year’s events click the links below for more information:

Low Quality of Coal in China: recent studies show

Beijing- China
Pollution control in China has been at the forefront of the environmental reform portion of the latest China Five Year Plan. Coal fired power stations account for a vast majority of air and water pollution. The percentage of pollution that comes from these stations is determined by a few factors. One of these factors is the purity of the coal itself. “Dirty” coal can come from excess sulfur & phenol and generally produces a higher level of ash. Coal ash itself can be highly toxic if the coal is of low quality and is not burned or processed efficiently. 

According to new testing completed by the Ministry of Environmental Protection (MEP) in the north of China, this “dirty” coal is being commonly used. Samples were taken from areas in and around the cities of Beijing, Tianjin and Hebei. Samples were collected from over 180 coal distribution centers. In each city, excessive pollutants were found in anywhere from 20 per cent to 40 per cent of all samples. MEP also inspected 10 thermal power coal stations used for residential heating in these areas and found that 7 of them had failed to meet coal quality standards. 

This information comes at a time of interest to the Chinese public as northern China turns on central heating for the winter months, which increases energy demands for power plants. The smog that Beijing and other northern provinces experience year round then thickens due to this increase. As the new Five Year Plan unfolds from the People’s Republic, the issue of clean coal will need to be addressed to fit with the current emphasis on industry reform and environmental sanctions.