CATL to build electric car battery cell factory in Thuringia, page-57

It has been disproven. The regulations explicitly allow export of mineral concentrates to those that apply and receive the relevant licence;
http://www.tcme.or.tz/resources/view/the-mining-mineral-beneficiation-regulations-2018
"7. A holder of a 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."
Like I have said before, it is there in black and white. Only the extremely naive or incredibly dim witted could fail top see that!