** MTM Critical Metals MTM.AX soars as much as 18.9% to an all-time high of A$0.440
** Stock posts biggest intraday pct gain since May 20
** Critical metals explorer says it recovered antimony from U.S.-sourced e-waste using its proprietary tech
** Adds antimony grade exceeds that of typical mined ore and U.S. has no significant domestic production
** About 6.7 mln shares traded vs the 30-day avg of ~4.8 mln
** MTM last up 13.5%, taking YTD gains to 61.5%
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))