One of the two kilns there – Kiln No 2 – is 44 years old and has been out of service for more than a year due to the economic slowdown.
A spokeswoman for Cemex said: "This is indeed a major investment. While the demolishing of the old precipitator has now been completed, the new installation will not be finished until October time.
"The fabrication is currently taking place off-site. This new, state-of-the-art filter will not only comply with existing dust emissions legislation, but also future legislation."
Handpicked stories, in your inbox
Our editors pick the top news delivered to your inbox. Sign-up today!