Exhibit 23.12

CONSENT OF ERIC MIELKE

The undersigned hereby consents to the use of the undersigned’s name and information derived from the Technical Report titled “Preliminary Economic Assessment of SW Arkansas Lithium Project” dated November 20, 2021, which is included in, or incorporated by reference into, the Registration Statement on Form S-8 dated January 28, 2022 and any amendments and exhibits thereto, of Standard Lithium Ltd.

/s/ Eric Mielke

Eric Mielke, M.A.Sc., P.Eng.

Process Engineer

NORAM Engineering and Constructors Ltd

Date: January 28, 2022