Displaying items by tag: Dust

Switzerland: A TEC has secured a contract to install a new ReduChlor chlorine bypass system at Holcim Schweiz’s Eclépens cement plant in Vaud. The supplier says that it will also fit a bypass dust handling system and upgrade the alternative fuel (AF) feeding system at the plant.

South Korea: A TEC says that it has installed and commissioned a ReduDust dust treatment plantin the chlorine bypass system of Ssangyong Cement’s Donghae cement plant in Gangwon. The ReduDust plant will recover salts from dust, enabling the producer to reuse the dust in its cement production. The supplier says that it will yield 35,000t/yr of useable dust. Ssangyong Cement already uses an A TEC Rocket Mill grinding unit in its alternative fuel (AF) production at the Donghae cement plant.

US: The Portland Cement Association (PCA) has announced the winners of its Energy and Environment Awards 2021. The awards recognise cement plants’ outstanding environmental and social efforts beyond what is required.

CalPortland’s Mojave plant in California won the Energy Efficiency award for an efficiency-increasing upgrade to its vertical roller mill, which included the introduction of a bottom hopper cone on each of its cyclones and a replacement of its mill fan housing. Argos USA’s Calera plant in Alabama won the Land Stewardship award for its conversion an 8.5ha lime kiln dust stockpile into grassland. The area now forms a vibrant ecosystem including wetland habitats. The producer also installed ponds with the additional purpose of stormwater management. Titan America’s Pennsuco plant in Florida won the Overall Environmental Excellence award for its conversion of the plant’s kiln to natural gas from coal use. The upgrade has also enabled the plant to begin to substitute alternative fuel (AF) in the kiln. The Pennsuco plant plans to produce 100% Portland limestone cement (PLC) by ‘as early as 2023.’

Other awards went to Roanoke Cement’s Troutville, Virginia, plant in the Environmental Performance category and to Cemex USA’s Victorville, California, plant in the Outreach category.

PCA President and CEO Michael Ireland said “The US’s cement manufacturers continue to focus on researching and developing new and innovative ways to reduce their environmental footprint. These accomplishments and industry commitment to carbon neutrality across the entire value chain demonstrate PCA members’ dedication to energy efficiency and a more sustainable future.”

US: Inhabitants of Ravena, New York, have reported a ‘gritty, sticky, dusty’ residue in areas of the town to mayor Bill Misuraca. The residents described the apparent dust spill as ‘more stubborn to remove’ than on previous occasions.

LafargeHolcim US, which operates the Ravena cement plant in the town, contacted the mayor about the issue, stating “We take all concerns and complains about the plant very seriously and aim to operate in a manner that causes zero harm to employees, contractors, customers, and most of all, local residents, in keeping with our core values.” It added "The plant will be working with the New York Department of Environmental Conservation (DEC) to collect data on the type and source of these materials."

Vietnam: Local residents have blocked entrances to Van Ninh cement plant in Quang Binh’s Quang Ninh district in protest against alleged pollution violations. Van Ninh Cement previously incurred a US$3100 fine for dust emissions following a similar protest in 2017. The residents have put up tents in which to sleep in front of the plant in order to prevent the blockade’s removal.

US: The Texas Commission on Environment Quality has discarded legal limits on crystalline silica in ready-mix concrete plants’ dust emissions. Commissioner Bobby Janecka said "I am pretty comfortable moving forward and finalising the proposed revision of the standard permit to bring us back to the point we departed from in 2012." He added that the commission had confirmed the decision with analysis from before the previous rule change, which he attributed to a ‘clerical error.’

Ghana: Residents of the McCarthy Hill district in Accra have launched a protest against China-based Empire Cement’s planned McCarthy Hill cement plant. The Daily Guide newspaper has reported that protestors allege that the proposed plant would contaminate water which flows through active salt mines. They have also complained about potential dust emissions from the site. So far the company has broken ground on the project and three silos are in place.

Iceland: Sementsverksmidjan has commissioned engineering company Efla to investigate a dust spill which occurred in early January 2021. The cement importer says that Efla will review its processes, assess impacts and advise on any measures to prevent the recurrence of such an accident.

The company said, “Following the accident, information has also emerged that the incident lasted longer than previously thought. This information has not been confirmed and is new to the company, but could mean that more cement has been released into the atmosphere than had previously been estimated. The cement factory takes this information seriously and will continue to work with Efla and the insurance company to fully analyse the matter.”

Iceland: HeildelbergCement subsidiary Sementsverksmidjan has apologised for an incident which caused cement dust to be released from a silo at its terminal in Akranes. An overflow during loading caused the dust to settle on nearby houses. The company collaborated with fire services, utilities companies and residents to tidy up.

The company said, “The incident yesterday was an accident which did not comply with the policy and will of the company or its owners. The company therefore apologises to all those who suffered inconvenience and will do everything in its power to ensure that accidents of this kind do not recur.”

India: The Tamil Nadu Pollution Control Board (TNPCB) has fined ACC subsidiary Madukkarai Cement US$61,000 for fugitive emissions of clinker and cement dust in mid-2020. The Hindu newspaper has reported that inspections found dust in the village Kurumbapalayam, Coimbatore District, located on the eastern side of the cement plant. An ambient air quality survey in September 2020 revealed higher-than-prescribed particulate volumes.

In addition to paying the fine, the producer must comply with 19 instructions of the TNPCB for air pollution control and monitoring by 7 January 2021.