Displaying items by tag: Dust

Zimbabwe: The Environmental Management Agency (EMA) has ordered Lafarge Cement Zimbabwe to stop operations at its integrated Harare plant due to abnormal dust emissions. As part of the order the plant has been requested to notify local stakeholders and the community of any new developments or incident that may affect them, according to the NewsDay newspaper. It will also be required to report daily dust emissions readings to the EMA every two weeks.

The cement producer said it experienced an unexpected surge in dust emissions during a trial of using saw dust as an alternative fuel at the plant between July 30 and 1 August 2020. It added that immediate action was taken to control and contain the emissions and the incident was reported to EMA in line with regulatory requirements.

Fiji: Pacific Cement has been forced to suspend production at its 0.1Mt/yr-capacity integrated Lami cement plant in Rewa Province following the issue of a stop order by the Department of Environment on 7 August 2020. Truck drivers employed by the company say that they are losing US$300/day as a result, according to the Fiji Times newspaper.

The Lami cement plant previously suspended operations subject to a stop order from the Department of Environment due to complaints about dust emissions on 7 December 2018.

US: Dragon Products has been fined US$67,000 by the Maine Department of Environmental Protection for exceeding air emissions regulations since 2013. Ammonia, carbon monoxide and particulate matter levels were all breeched, according to the Bangor Daily News newspaper. Other irregularities with standards were also noted, such as baghouse inlet temperature limits and clinker cooler opacity standards.

Canada: Residents at Port-Daniel-Gascons in Quebec reported dust emissions from the McInnis Cement plant in June and July 2020. This has been blamed on mechanical breakdowns and a computer failure, according to the Journal de Québec newspaper. The cement producer says it has reported the situation to the local authorities. Commercial production at the plant started in mid-2017. The incidents reportedly took place as the plant reached its maximum production capacity.

China: Henan Province has announced a planned rise in water and energy tariffs for cement producers that fail to meet current emissions standards and clean transportation requirements. Reuters News has reported that companies subject to the measures will pay US$0.07 – US$0.14/m3 more for water and up to US$0.01/kWh more for electricity. Henan enacted ‘ultra-low’ emissions limits of 10Mg/Nm³ of dust, 50Mg/Nm3 of NO_x and 100Mg/Nm³ of SO₂ in 2018. Cement plants in the province produce 105Mt/yr of cement.

US: A cloud of dust from Cemex’s 3.3Mt/yr Victorville, California plant caused the fire brigade to be called to the site at 17:00 on 24 April 2020. Victor Valley News has reported that what onlookers believed to be smoke was indeed escaped dust from silo refilling. Locals reported that dust frequently covers their cars.

Uzbekistan: The State Committee on Ecology and Environmental Protection (SCEEP) has suspended operations at SingLida’s 0.1Mt/yr integrated Ahtachi plant in Andijan region. Trend News has reported that, following an audit of clinker production between 12 February 2019 and 21 February 2019, the cyclones had failed to meet lawful standards of dust collection. Rates varied between 53% and 61% dust collection, compared to a design capacity of 100%. The government body said that it had given ‘instructions for prompt elimination of deficiencies and reduction of pollutant emissions into the air,’ and has suspended operations of the clinker line and mill until such a time as the problem is resolved.

Germany: Beumer Group has developed a screw weigh feeder with automatic calibration. The company says it is especially well suited to exact and controlled feeding of inhomogeneous bulk materials of densities between 0.08t/m³ and 0.80t/m³ and extremely high moisture content such as alternative fuels. Its capacity is 30t/hr and its weighing tolerance is between 1% and 2%. It is completely covered to prevent dust and other environmental stresses.

Germany: Buzzi-Unicem subsidiary Dyckerhoff has paved the 3700m2 of road outside the limestone quarry at its 0.4Mt/yr integrated Geseke plant in North Rhine-Westphalia. It used a concrete blend containing PKZ Doppel N cement produced at the Geseke plant, which it applied to a thickness of 20cm over an asphalt base. Dyckerhoff made the decision to pave the road ‘to minimise dust emissions, especially in prolonged dry spells.’ It says the concrete’s low water content and good compression give the road a strength rating of 50N/mm2.

US: The attorney’s office of Harris County in Texas filed a lawsuit against Sesco for alleged public safety and environmental violations following multiple complaints to the Harris County Pollution Control Board about dust. Piles of debris in an outdoor area of Sesco’s Houston cement terminal may have caused high dust levels in and around the facility and high pH levels in water located nearby. Houston Business Journal conjectured that the stockpiles might consist of surplus cement being stored unlawfully. Sesco stands accused of operating two silos and three hoppers without proper environmental clearance. Inspections in 2019 uncovered set cement in storm drains at the facility.