|
Recycling fly ash in Bouskoura Location: Bouskoura Year: 1999
Introduction
Lafarge Maroc
Fly ash is a by-product of coal-burning power plants, which can be used in the cement manufacture, thus preserving natural resources while cutting CO2 emissions.
In Morocco, coal-fired power plants are estimated to generate some 570,000 metric tons per year of fly ash (including 400,000 tons per year recoverable as dry matter). The ash was formerly dumped in the sea or stored in dams. However, it polluted soil and groundwater and affected marine flora and fauna.
The project was implemented so as to recycle fly ash by adding it to raw meal and using it as a cement additive. These alternative raw materials are recognized for their properties as hydraulic binders.
Description of the project
Within the framework of a consortium, Lafarge Maroc and other cement manufacturers signed a contract with Jorf Lasfar Energy Company to purchase the fly ash produced by the latter’s power plant. The Bouskoura cement plant invested in new infrastructure to accommodate use of the fly ash as a cement additive: a 5,000-ton silo, a metering system and a conveyance system to feed the grinders. Today, the Bouskoura plant produces cement with a 6.5% fly ash content.
Results
Launched in 1999 with a temporary installation designed to recycle 40,000 metric tons of fly ash per year, the recycling capacity of upgraded installations amounts in 2006 to more than 200,000 metric tons for a full year of operation. By limiting the stockpiling and dumping of ash, this project reduces soil and groundwater pollution and protects the marine environment. It is also a factor in resource conservation and reduction of CO2 emissions.
For more information Lafarge Ciments, tel: 022 52 49 72 /80, fax: 022 50 44 46 Usine de Bouskoura, tel: 022 91 92 00, fax: 022 92 22 00 Agence de Bouskoura, tel : 022 91 92 17, fax : 022 91 92 19
|
