BIL - BHP Billiton Plc - Billiton secures interest30 Apr 2007
BIL
 BIBLT                                                                           
BIL - BHP Billiton Plc - Billiton secures interest in Guinean Bauxite Project   
BHP Billiton Plc                                                                
Share code:         BIL                                                         
ISIN:               BG0000566504                                                
Date: 27 April 2007                                                             
BHP BILLITON SECURES INTEREST IN GUINEAN BAUXITE PROJECT                        
BHP Billiton today announced the acquisition of a 33.3 per cent interest in     
Global Alumina`s Sangaredi Refinery Project in Guinea, West Africa, for a       
consideration of US$140 million.                                                
The project comprises the design, construction and operation of a 3Mtpa alumina 
refinery, 9Mtpa bauxite mine, and associated infrastructure.  A mining          
concession covering 690km2 has been secured and a mineral resource of 233       
million tonnes bauxite (@ 39% Available Alumina and 1% Reactive Silica) has been
reported.  This is considered sufficient to support the development, but further
exploration work is underway to increase the resource size.                     
The proposed refinery site is approximately 100km inland from Kamsar and has the
benefit of access to existing rail infrastructure linking it to the Port of     
Kamsar, where dedicated facilities are already under construction.              
"This project provides the Joint Venture partners with access to a long life,   
low cost, world class resource base and represents an excellent opportunity for 
BHP Billiton to continue to grow its business in a value accretive manner"      
commented Graeme Hunt, President Aluminium for BHP Billiton.                    
"In view of BHP Billiton`s other exploration interests in Guinea, this project  
also offers us valuable experience of operating in this first tier minerals     
province," he added.                                                            
As part of the agreement, BHP Billiton will appoint the Chief Executive Officer 
and Chief Financial Officer of the Joint Venture Company (JVC) and will enter   
into a services agreement with the JVC for the development, construction and    
operation of the project, which will be operated in accordance with BHP Billiton
standards.                                                                      
Global Alumina will now hold a 33.3 per cent equity interest in the Sangaredi   
Refinery Project, Dubai Aluminium Company Limited a 25 per cent interest and    
Mubadala Development Company PJSC 8.3 per cent.                                 
I, Dominique Louis Butty, a director of Butty Herinckx & Partners geological and
mining consultants,  am a member of the European Federation of Geologists and   
have sufficient experience which is relevant to the Sangaredi Refinery Project  
style of mineralisation and type of deposit and to the estimation of Mineral    
Resources and Ore Reserves to qualify as a Competent Person as defined in the   
2004 Edition of the `Australasian Code for Reporting of Exploration Results,    
Mineral Resources and Ore Reserves`.  I, Dominique Louis Butty consent to the   
inclusion of the Sangaredi Refinery Project Mineral Resources in the BHP        
Billiton Global Alumina press release, in the form and context in which it      
appears.                                                                        
Further information on BHP Billiton can be found on our Internet site:          
www.bhpbilliton.com                                                             
Australia                               United Kingdom                          
Samantha Evans, Media Relations         Mark Lidiard, Investor & Media          
Tel: +61 3 9609 2898                    Relations                               
Mobile: +61 400 693 915                 Tel: +44 20 7802 4156                   
email: Samantha.Evans@bhpbilliton.com   Mobile: +44 7769 934 942                
                                       email: Mark.Lidiard@bhpbilliton.com      

Jane Belcher, Investor Relations        Illtud Harri, Media Relations           
Tel: +61 3 9609 3952                    Tel: +44 20 7802 4195                   
Mobile: +61 417 031 653                 Mobile: +44 7920 237 246                
email: Jane.H.Belcher@bhpbilliton.com   email: Illtud.Harri@bhpbilliton.com     
                                                                                
                                                                                
United States                           South Africa                            
Tracey Whitehead, Investor & Media      Alison Gilbert, Investor Relations      
Relations                               Tel: SA +27 11 376 2121                 
Tel: US +1 713 599 6100                 or UK +44 20 7802 4183                  
or UK +44 20 7802 4031                  Mobile: +44 7769 936 227                
Mobile: +44 7917 648 093                Email: Alison.Gilbert@bhpbilliton.com   
email: Tracey.Whitehead@bhpbilliton.com                                         
Date: 30/04/2007 07:43:01 Produced by the JSE SENS Department.