Visibility control of main stack plume at CST sinter plant: a scientific approach G. C. Abreu, A.-M.-M. Ferreira, H.-L.-M. Oliveira, M.-W. Andrade, J.-B. Mendes, E.-L.-M. Harano, R.-G. de Rezende and R. da Silveira Queiroz Rev. Met. Paris, 104 9 (2007) 380-383 Published online: 15 September 2007 DOI: 10.1051/metal:2007202