Displaying items by tag: Calcium Carbonate

Japan: Taiheiyo Cement has partnered with JFE Steel and the Global Institute for Environmental Technology to develop a carbon capture and storage system. The system will use wet alkaline earth metals extracted from steel slag to produce carbonates from exhaust gases at cement and steel plants. The partners are investigating the possibility of using these carbonates, specifically calcium carbonate and magnesium carbonate, as additives in cement production at Taiheiyo Cement’s plants. Taiheiyo Cement president Masafumi Shigehara said, “With the effects of climate change becoming apparent both in Japan and overseas, the importance of global warming counter-measures is increasing.”

US: The Japan Coal Energy Center (JCOAL), GreenOre Clean Tech, Columbia University and Wyoming Infrastructure Authority (WIA) have entered into a memorandum of understanding (MOU) to test carbon utilisation and recycling technology. GreenOre Clean Tech, using technology under license from Columbia University, will use testing space at the Integrated Test Center (ITC) near the Dry Fork Station coal-fired power station in Gillette, Wyoming. Calcium carbonate produced through CO₂ mineralisation could then potentially be used for aggregates, concrete production or in paper production. The test will be funded by JCOAL with additional support from project partners.

The State of Wyoming and JCOAL have been working together since 2016, when they signed an initial MOU committing to cooperation in coal research and development of technologies and coal trade. JCOAL operates under the supervision of the Ministry of Economy, Trade and Industry of Japan and is supported by more than 120 member coal-related businesses, including Kawasaki Heavy Industries, Mitsubishi Hitachi Power Systems, Nippon Steel and Toshiba. Kawasaki is scheduled to test its solid sorbent capture technology at the ITC beginning in 2021.

Colombia: Cementos Argos plans to sell its stake in Omya Andina for US$18.6m. It said it was focusing on the cement, concrete and aggregates business, according to the La República newspaper. Omya Andina is a subsidiary of Switzerland’s Omya that operates in Colombia. It produces calcium carbonate and speciality chemicals for a range of industries including construction and agriculture.

US: Elixsys has completed a 100hr continuous pilot test to extract ammonium sulphate and calcium carbonate from flue gas desulphurisation solids at a coal-fired power plant in Pennsylvania. Products made using the company’s proprietary process meet the specifications for fertiliser-quality ammonium sulphate and technical-grade calcium carbonate.

The company intends to start a commercial-scale project of its technology in 2019 once it finds a utility partner. Full-scale operations are planned by 2022. The company is also starting pilot testing on another process to extract metals from coal ash.

Qatar: Trial operations have commenced by the Qatar National Cement Company (QNCC) on its USD6m calcium carbonate plant at Umm-Bab in southern Qatar. QNCC has signed an agreement with the Stream Industrial Engineering Company to build the plant on a turn-key basis. The plant will be specialised in the production of calcium carbonate for use in water treatment operations and is expected to have a production capacity of 250t/day.

QNCC general manager Mohamed Ali al-Sulaiti commented, "There is an agreement with Kahramaa to buy the calcium carbonate for 25 years. For the plant, Ras Girtas power station at Ras Laffan will be one of the supporting stations." He added "QNCC is carefully growing and expanding to play its national role in supporting the infrastructure development in the state, especially after Qatar won the bid for hosting the 2022 FIFA World Cup." Al-Sulaiti further stated that the company has set up two new mills with a planned capacity of 130t/h.