BMR Mining's shares gained as it revealed that its metallurgical tests used to identify lead and zinc at its Zambian site have been successful.The tests, which use an acid and brine leaching process to recover the metals, came in positive for both the Wash Plant Tailings and Leach Plant Residue Tailings at Kabwe."We are pleased to announce the results of the metallurgical test programme as a prelude to the establishment of a pilot processing plant, which confirm acid/brine leaching as the appropriate method for extracting a viable precipitate from our valuable resources at Kabwe," said Chairman Alex Borrelli.As of 12:15 BST, BMR Mining was trading 5% higher at 5.4p.