Nevada Zinc Corporation announced the commencement of a bulk operation to produce zinc sulfate monohydrate as part of its multiphase pilot plant program being conducted by Hazen Research Inc. ("Hazen") for the Company's Lone Mountain zinc project. A bulk operation, comprised of batch-type unit operations, will be conducted, and is expected to produce approximately 150 lbs. of a commercial grade zinc sulfate monohydrate product (ZnSO4·H2O) followed by the cost analysis of the process flowsheet's capital and operating costs.

The current process flowsheet based on the previously conducted bench scale experiments utilizes gravity concentration instead of a flotation circuit and includes five key process stages: Ore crushing and grinding; Gravity concentration; Leaching and neutralization; Cementation and solvent extraction; and Crystallization. The bulk operation phase is expected to be completed in second quarter 2022. The Company will provide updates as material results become available.