US EPA

6874103 

Journal Article 

Industrial clays of Brazil: a review 

Santos, PD; , 

2003 

ELSEVIER SCIENCE BV 

AMSTERDAM 

323-330 

WOS:000186143000042 

Brazilian kaolins, residual and sedimentary, range as 6(th) in world production. Deposits are in Jari and Capim rivers, Pard. Ball clays used for whiteware industry are partly supplied by imports from U.K. and Argentina. Refractory industry is supplied by fireclays and high alumina (gibbsitic) clays from several Brazilian deposits. Sodium-bentonite is produced for petroleum and metallurgical industries from Ca-bentonite from Northeast; there is an import of Na-bentonite from Argentina. Acid activated smectite is produced for bleaching of vegetable oils and there are imports from Mexico and USA. Organophilic bentonite is also produced with Brazilian raw materials. Palygorskite clays occur in the State of Piaui. Brazil is the 5(th) world producer of ceramic tiles; illite/smectite rich clays are widespread in the country and are used for that purpose and also for lightweight aggregates. Vermiculite deposits are exploited for production of exfoliated materials for thermal and acoustical insulation. Nickel clays, mostly smectitic, are used for production of nickel. Extensive deposit of oil shale is exploited for pilot-plant production of oil shale. The shale and the retorted shale can be used for self-firing production of structural clay products. Common clay is widespread and is used for Portland cement production, pozzolan, and structural clay products. There is small production of ground pyrophyllite for refractories and Al/Si alloy. There is a large production of different types of talc from massive and from clay-like rocks. Chrysotile asbestos is produced for internal consumption and for exportation. 

Dominguez, E; Mas, GR; Cravero, F; 

0-444-50945-3 

12th International Clay Conference 

BAHIA BLANCA, ARGENTINA