Гранулы оптом колтан

Coltan tantalite  ore ta205

rare earth metal
25000 mt/ready stock into 14 drums
prompt delivery against inspection & sampling by the buyer

ta2o5 35,40%
nb2o5 34. 9%
tho2 0,059%
u3o8 0,199%
v2o5 0,11%
fe2o3 26,90%
cr2o3 7,44%
tio2 13,40%
sio2 2,16%
s <0,01
p 0,11%
zro2 0,31%

sno2 0,798%

coltan typical market specifications coltan on the international market generally contains a minimum of 30% ta2o5, while lower grade material with a minimum of 20% ta2o5 may also be of interest. the commercial payable value is based on the ta2o5 content alone, any nb2o5 is generally ignored. should the material contain mainly nb2o5 and only little ta2o5, then it would be sold as columbite and should contain a minimum of 50% nb2o5. the payable value is based on the nb2o5+ta2o5 content payable entirely as nb2o5; the ta2o5 content is not paid a higher rate.