Ann: Tanzanian Update on Nachu Graphite Project, page-287

Hey Tony have a read of this;
http://www.tcme.or.tz/resources/view/the-mining-mineral-beneficiation-regulations-2018
And I quote;
"PART II
MINERAL BENEFICIATION
(a) Application for licence
Application for processing licence
3.-(1) An application for processing licence shall be made in Form MBF. 1 and a processing licence shall be issued in Form MBF. 2 respectively specified in the Second Schedule to these Regulations.
(2) The fees specified in the First Schedule to these Regulations shall be payable for application for processing licence and for issuance of processing licence.
Mining (Mineral Beneficiation) Regulations
GN. No. 5(contd.)
7. A holder ofa processing licence, smelting licence or refining licence is, subject to this Regulation, entitled to carry on processing minerals, smelting minerals or refining minerals in a specified area of the licence, and for that purpose the holder, servants and agents may, deal in:
(a) buying or otherwise acquiring or selling or otherwise dispose of minerals as specified in the licence and for that purpose be in possession of minerals;
(b) export minerals specified in the licence; or
(c) erect necessary equipment, plant and infrastructure for purposes of operating, transporting, dressing or treating minerals in the possession of holder of a licence.
Mining (Mineral Beneficiation) Regulations
GN. No. 5(contd.)"
So as you can plainly see now, there is NO BAN on the export of mineral concentrates!!