Patent ID: 11873541
Assignee: JIANGXI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G  Y | IPC C  G

Claim 3:
4. The method for determining the source sink term in the ionic type rare earth ore leaching process according to claim 1, wherein a determining method of the ion exchange selection coefficient K in the step two is that:
the ion exchange model is to describe the ion exchange process (a relational expression (4)) by a Kerr model;
a relational expression (5) to a relational expression (7) are substituted into the relational expression (4);
the ion exchange selection coefficient is taken as a basic unknown;
the relational expression (4) is used to fit the relationship curve of the concentration of the ore leaching agent and the concentration of the rare earth ions in the leachate to determine the ion exchange selection coefficient K of the rare earth ore sample;, K
          =
          
            
              
                
                  (
                  
                    C
                    s
                    
                      NH
                      4
                    
                  
                  )
                
                3
              
              ⁢
              
                C
                in
                RE
              
            
            
              
                
                  (
                  
                    C
                    in
                    
                      NH
                      4
                    
                  
                  )
                
                3
              
              ⁢
              
                C
                s
                RE
              
            
          
        
        ,
      
    
    
      
        (
        4
        )
      
    
  

in a relational expression (2), CsRE, ClqNH4 and CsNH4 may be determined by using the relational expression (5) to the relational expression (7):, m
                s
              
              ⁢
              
                C
                s
                RE
              
            
            +
            
              
                C
                lq
                RE
              
              ⁢
              
                V
                L
              
            
          
          =
          
            
              
                m
                s
              
              ⁢
              
                C
                
                  s
                  ⁢
                  
                    
                  
                  ⁢
                  0
                
                RE
              
            
            +
            
              
                C
                
                  lq
                  ⁢
                  
                    
                  
                  ⁢
                  0
                
                RE
              
              ⁢
              
                V
                L
              
            
          
        
        ,
      
    
    
      
        (
        5
        )
      
    
  
  
    
      
        
          
            
              
                m
                s
              
              ⁢
              
                C
                s
                
                  NH
                  4
                
              
            
            +
            
              
                C
                lq
                
                  NH
                  4
                
              
              ⁢
              
                V
                L
              
            
          
          =
          
            
              
                C
                
                  lq
                  ⁢
                  
                    
                  
                  ⁢
                  0
                
                
                  NH
                  4
                
              
              ⁢
              
                V
                L
              
            
            +
            
              
                m
                s
              
              ⁢
              
                C
                
                  s
                  ⁢
                  
                    
                  
                  ⁢
                  0
                
                
                  NH
                  4
                
              
            
          
        
        ,
      
    
    
      
        (
        6
        )
      
    
  
  
    
      
        
          
            
              
                3
                ⁢
                
                  C
                  s
                  RE
                
              
              
                M
                RE
              
            
            +
            
              
                C
                s
                
                  NH
                  4
                
              
              
                M
                
                  NH
                  4
                
              
            
          
          =
          
            
              
                3
                ⁢
                
                  C
                  
                    s
                    ⁢
                    
                      
                    
                    ⁢
                    0
                  
                  RE
                
              
              
                M
                RE
              
            
            +
            
              
                C
                
                  s
                  ⁢
                  
                    
                  
                  ⁢
                  0
                
                
                  NH
                  4
                
              
              
                M
                
                  NH
                  4
                
              
            
          
        
        ,
      
    
    
      
        (
        7
        )
      
    
  

in the relational expression (5) to the relational expression (7), MNH4 and MRE are the molar masses of the ammonium ions and the rare earth ions, respectively; ms is the mass of the rare earth ore sample; VL is the volume of the external solution; CsNH4 and CsRE are the concentrations of the ammonium ions and the rare earth ions which are adsorbed on the surfaces of the rare earth ore sample particles, respectively; ClqNH4 and ClqRE are the concentrations of the ammonium ions and the rare earth ions in the external solution, respectively; Cs0NH4 and Cs0RE are the concentrations of the ammonium ions and the rare earth ions which are adsorbed on the surfaces of the rare earth ore particles before the ore leaching, respectively; and Clq0NH4 and Clq0RE are the concentrations of the ammonium ions and the rare earth ions in the external solution before the ore leaching, respectively.