Displaying items by tag: clay

France: Fives has refurbished a rotary kiln at SOKA’s (Société Kaolinière Armoricaine) kaolin plant at Quessoy. Work on the project included: implementing a new nose-ring fitted with a downstream seal, to reduce false air flow and improve brick-lining lifetime; machining the tyres, replacing of the rollers and installing a new lubrication system, to improve the kiln scanning and enable an homogenous wear of the contact areas; and installing a grease spraying system fitted with a new girth gear housing to prevent advanced wear initiated by grease contamination. SOKA specialises in the extraction, processing and calcination of raw kaolin, refined kaolin and calcined kaolin in France and Ukraine.

France: Hoffmann Green Cement Technologies has begun construction of its second cement plant, called H2. The company will build the plant next to its existing H1 plant in Bournezeau, Vendée, using its clinker-free cement made from blast furnace slag, clay and gypsum. It will have a capacity of 250,000t/yr and cost Euro22m.

Co-founders Julien Blanchard and David Hoffmann said “This second plant is a key milestone in our development plan in order to increase our production capacity. H2 will enable us to address the growing demand for our clinker-free low-carbon cement, as we have recently signed a number of partnerships with key construction players such as Groupe GCC, KP1, Capremib, Cemex and Eiffage Génie Civil. We would like to congratulate our teams, as this second plant is the result of a multitude of challenges taken up in 2020 in order to increase production capacity. It is the rare combination of an exceptional industrial performance and a minimised environmental impact. This structure demonstrates our industrial excellence and perfectly and genuinely materialises our intent to decarbonise the construction sector.”

Head of new construction Olivier Lefelle said “This second plant represents a major and structuring step. The choice of a vertical model for the mixing tower is an innovative concept in the construction sector and is perfectly in line with Hoffmann Green’s responsible vision. Furthermore, by using Hoffmann cement for its construction, this building site will enable CO₂ emissions to be reduced by around 20,000t.”

Russia: Eurocement subsidiary Kavkazcement has announced its acquisition of a Hitachi excavator for use at its clay quarry. The reasons behind the choice of excavator were its high productivity and low operating costs.

Kavkazcement director general Oleg Lopatin said, “The hydraulic excavator will develop clay reserves in areas complicated by large slopes, increasing the economic efficiency of raw material extraction and ensuring the stability of the final product. Kavkazcement systematically modernises all stages of production, which allows us to guarantee high quality and reliability of product deliveries to key construction sites in the south of Russia.”

US: The Montana Department of Environmental Quality (DEQ) is accepting public comment on a proposed shale-clay exploration project by Ireland-based CRH’s subsidiary Ash Grove Cement near its Clark Gulch quarry. The Observer has reported that the project would consist of construction of a 0.62km road and the extraction and transportation of a 10,000t sample. The window for comment closes on 3 January 2020.

South Korea: The Korea Cement Association (KCA) says its members will increase the use of coal ash from local thermal power plants or source alternative raw materials from domestic clay mines. The decision follows a trade dispute between South Korea and Japan, according to the Aju Business Daily newspaper.

The Environment Ministry started to tighten rules concerning the import of coal ashes from Japan in August 2019 citing fears of radioactive and heavy metal contamination. Importers are now required to submit an authorised radioactive inspection report and the analysis of heavy metal components. The KCA said its members use 3.15Mt/yr of coal ash and 1.28Mt/yr is imported from Japan.

Vietnam: Kien Giang province has granted an investment licence to Siam City Cement Vietnam for a limestone and clay mining project and a clinker kiln project in Kien Luong district. Both projects have a combined investment of around US$470m, according to the Viet Nam News newspaper. The subsidiary of Thailand’s Siam City Cement Group operates five plants in the country following its acquisition of Holcim Vietnam in 2017.

France: Hoffmann Green Cement Technologies and Bouygues Construction have signed a 30-month initial technical and commercial collaboration agreement to develop and test concrete formulations using new cement made from Hoffmann’s H-EVA technology. Hoffmann Green Cement inaugurated its pilot plant at Bournezeau, Vendée in late 2018. The unit will manufacture cement products using flash-calcined metakaolin and blast-furnace slag. Bouygues Construction is a global construction company with a presence in over 60 countries.

Bolivia: SEDEM, the government’s business development agency, has refuted accusations that a new cement plant being built in Caracollo, Oruro does not have enough water or raw materials. Patricia Ballivián, the general manager of SEDEM, presented reports from PricewaterhouseCoopers and C & C Ingeniería y Procesos defending the supplies to the unit. The reports were released in response to accusations by a local politician that the project had been poorly planned.

The reports revealed that the Empresa Publica Productiva Cementos de Bolivia’s (ECEBOL) plant will recycle the industrial portion of its water supply. It will have a supply of 4l/s and a 3.5Ml reservoir. It also has limestone, gypsum and clay reserves sufficient for the production of 100Mt of cement. These are expected to last the plant 60 years.

Portugal: Researchers at the Department of Materials Engineering and Ceramics at the University of Aveiro have developed a so-called ‘eco-cement’ that uses waste cellulose and clay. The cement type uses waste from the pulp industry such as ash and lime grains. This makes up 70% of its composition with the remaining 30% being metakaolin clay. The cement can be manufactured at room temperature reducing its energy consumption massively compared to Ordinary Portland Cement. The research team includes Manfredi Saeli, Rui Novais, Paula Seabra and João Labrincha.

Taiwan: Taiwan Cement has reassured the public about the quality and safety standards of its cement and other products. It follows fraud charges being issued to a former government official for supplying raw materials mixed with industrial waste to the cement producer, according to the Taipei Times. Taiwan Cement says it is conducting inspections on all raw materials, including taking random samples of the top and bottom layers of delivery trucks from suppliers.

Lai Chin-kun, a former Hualien County Council speaker, secured local government contracts for his family’s companies to dispose of industrial waste, including industrial byproducts and inorganic debris from electroplating, optoelectronics and display panel manufacturers and pulp paper processing companies. Another family company won a contract with Taiwan Cement in 2010 to supply limestone, clay, sand and other raw materials required for cement production.

Prosecutors allege that when supplying raw materials to Taiwan Cement, Lai instructed company drivers to fill the bottom half of the trucks with industrial waste and place natural materials, such as clay, sand and limestone, on the top half to fool inspectors. Lai reportedly made US$14.1m from the scheme from 2010 to 2015.