The ''Compagnie des Bauxites de Kindia'' (CBK), a joint venture between the government of Guinea and RUSAL, produces some 2.5 million tonnes annually, nearly all of which is exported to Russia and Eastern Europe. Dian Dian, a Guinean/Ukrainian joint bauxite venture, has a projected production rate of  per year, but is not expected to begin operation for several years. The ''Alumina Compagnie de Guinée'' (ACG), which took over the former Friguia Consortium, produced about 2.4 million tonnes in 2004, as raw material for its alumina refinery. The refinery exports about 750,000 tonnes of alumina. Both Global Alumina and Alcoa-Alcan have signed conventions with the government of Guinea to build large alumina refineries, with a combined capacity of about 4 million tonnes per year.