Displaying items by tag: clay

US: National Cement Company of Alabama has reported that the new kiln line at its Ragland cement plant will reduce the plant’s CO₂ emissions by 40%. Its energy consumption will also fall by 30% as a result of the upgrade. The new line includes a 78m-high homogenisation silo, vertical crusher, five-stage preheater and automated clay storage system. AF used in the kiln will include waste tyres, woodchip and sawdust. The new kiln will help in the Ragland cement plant’s transition to 100% Portland limestone cement (PLC) production by 2023, further diminishing its carbon footprint.

Vicat CEO Guy Sidos said "Our ambition is to use AF in all our cement plants around the world. In addition to eliminating fossil fuel energy and replacing it with recycled regional waste, our investments contribute directly to local development. We are proud of the modernisation and transformation of our Ragland site, which was our very first acquisition outside France in 1974."

UK: Karbonite UK has developed a new supplementary cementitious material consisting of mineral feedstock, geopolymers and waste biomass. The process also involves CO₂ sequestration and liquid-infused CO₂ absorption within the mineral structure. The material, called Karbonite, is activated at 750 – 850°C, releasing water, which is captured for recycling. Its CO2 emissions are 2.7kg/t, according to Karbonite UK. The developer says that Karbonite ground with 50% clinker yields a cement of equal compressive strength to ordinary Portland cement (OPC).

Karbonite UK is currently preparing a final report on the product for a major cement producer.

Managing director Rajeev Sood said “Karbonite offers a wealth of potential to an industry targeting net zero. We are excited to talk to cement and concrete producers about how they could integrate Karbonite technology into their existing process.”

US: Lhoist North America and Mississippi Lime Company have announced price increases for their products subject to existing contractual obligations.

Lhoist North America increased its prices by 10% for lime, limestone and clay products from the start of April 2022. It blamed this on inflation upon the cost of chemical additives, electricity, explosives, diesel, mining equipment, spare parts, inbound transportation, mining services and other inputs.

Mississippi Lime Company has announced that it will increase its prices by 7% from the start of May 2022. It cited a combination of market demand, inflation and supply chain issues.

France: Sustainable concrete producer Materrup has shared plans for its upcoming Bordeaux precast concrete elements plant. The L’Usine Nouvelle newspaper has reported that the facility will produce precast elements from Materrup’s cement-free concrete, which it produces from uncalcined clay, an activator and a precursor at room temperature. The technology, called Clay Cement 1 (MCC1), reduces CO₂ emissions by 50 – 80% compared to ordinary Portland cement (OPC), according to the producer. It previously opened a Euro7m 50,000t/yr plant in the Atlantisub Business Area in Saint-Geours-de-Maremne, Nouvelle-Aquitaine.

Russia: Eurocement subsidiary Maltsovsky Portland Cement has reportedly commissioned a new diesel locomotive to deliver clay to its Maltsovsky cement plant in Bryansk Oblast. According to Russia-based media outlet Stroymedia, eight locomotives operate on the company’s 53km-long railway network during the construction season. Maltsovsky Portland Cement will reportedly replace sections of track and continue the renewal of its rolling stock during 2022.

Austria: W&P Zement has installed a Euro2.5m new raw materials processing plant at its Peggau quarry in Styria. The plant will introduce modern washing and sieving processes to operations at the quarry, with an additional sludge buffer for the processing of clayey material. Project manager and mining manager Jürgen Kolp said that the plant will improve the sustainability of the company’s raw materials extraction operations by increasing the limestone yield from excavated raw material.

Australia/UK: InterGroup Mining has secured just under Euro60m from Luxembourg-based investment group GEM Global Yield as part of a share subscription facility. The Australia-based mining company says it will use the funds primarily for the ongoing development and commercialisation of its Brilliant Brumby kaolin and gold project in Queensland. The company hopes to sell the kaolin for use in cement and concrete production or as a feedstock for high purity alumina (HPA). It says it will be able to drawdown the funds over a 36-month term following a public listing of its common stock.

Neil Miller, the chairman of InterGroup said, “The GEM facility provides a major accelerator for InterGroup as we continue to prove up the scale of our Brilliant Brumby project and the optimal development path for the co-mining opportunity of kaolin and gold. It likewise enables us to continue our important research and development work into the new carbon reduction markets of potential scale that our minerals serve and which complement their existing known end markets.” InterGroup is currently working towards a potential stock market flotation in the second half of 2021.

Romania: Liberty Galați said in June 2021 that it exported 50,000t of granulated blast furnace slag (GBFS) to France. The steel company said that a French cement producer will use the GBFS along with clay and gypsum in clinker-free cement production. The alternative cement reduces CO₂ emissions by 80% compared to ordinary Portland cement (OPC), according to the supplier. Liberty Galați’s operations generate 500,000t/yr of GBFS. It says that it has cement industry customers across Europe and Africa.

General Director Aida Nechifor said “Our ambition to become carbon neutral by 2030 involves a new metallurgical route – using direct iron reduction and smelting in electric arc furnaces – increased scrap metal recycling and a transition to domestically-generated green energy. However, we are very happy to be able to ensure that even the by-products of our current production process, such as GBFS, can be used better to help reduce the carbon footprint of other products.”

Colombia: The Regional Autonomous Corporation of Antioquia (CorAntioquia) approved the modification of the environmental license of Cemex Colombia’s upcoming 1.0Mt/yr Cementera del Magdelena Medio integrated cement plant in Maceo, Antioquia. The modification will allow for the production of up to 1.5Mt/yr of cement annually. It will additionally enable the company to extract up to 990,000t/yr of limestone and clay. The producer called the authorisation an ‘important step’ towards the plant’s completion.

Cemex Colombia and Peru president Alejandro Ramírez said, "The modification of the environmental licence is a milestone that allows us to resume work to make this project a reality, through which it is expected that we will offer our materials for infrastructure and housing works in the country more efficiently."

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.