August 30, 2022

Toronto, ON – August 30, 2022 – Nevada Zinc Corporation (“Nevada Zinc” or the “Company”) (TSXV: NZN) is pleased to provide the following operational update on its multiphase, zinc sulfate monohydrate, pilot plant project. 

Operational Update

The Company’s multiphase pilot plant project that commenced in April 2022 has, through gravity separation, successfully produced concentrates of approximately 31% zinc. The next phase in the pilot plant project, after the production of a sufficient quantity of concentrates, is to upgrade the concentrates by downstream hydrometallurgical processes to produce zinc sulfate monohydrate that meets the requirements for use as both a fertilizer and in animal feed. The hydromettalurgical phase is scheduled to commence in mid September. The objective of this final stage of the Company’s multiphase pilot plant project is to economically produce approximately 100 pounds of zinc sulfate monohydrate with an approximate zinc grade of 35.5%. Following completion of the hydrometallurgical processes a cost analysis of the production process flowsheet’s operating and capital costs will be completed. This final stage of the pilot plant project is projected to be completed midway through Q4 of 2022. 

The zinc sulphate monohyderate produced will then be analysed by an independent lab in Q4 2022, prior to being field tested in the nearby California tree nut market.

TORONTO, March 08, 2022 (GLOBE NEWSWIRE) -- Nevada Zinc Corporation (“Nevada Zinc” or the “Company”) (TSX-V: NZN) is pleased to announce 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:

1. Ore crushing and grinding;

2. Gravity concentration;

3. Leaching and neutralization;

4. Cementation and solvent extraction; and

5. Crystallization.

Max Vichniakov, President and CEO of Nevada Zinc commented: “A bulk operation is the final phase of our multiphase pilot plant program and truly an exciting stage in the development of our project. We have eagerly anticipated this step followed by the recently completed financing. Zinc sulfate is an essential zinc and sulfate-sulfur fertilizer for growing crops and plays a vital role as animal feed. The US agricultural markets are currently experiencing a bullish momentum, and a natural, environmentally friendly, traceable, and locally produced zinc sulfate fertilizer and animal feed product could not be more timely.”

The bulk operation phase is expected to be completed in Q2/22. The Company will provide updates as material results become available.

Toronto, Ontario--(Newsfile Corp. - March 9, 2021) -  Nevada Zinc Corporation (TSXV: NZN) ("Nevada Zinc" or the "Company") is pleased to announce the engagement of Hazen Research, Inc., Golden, Colorado ("Hazen") to conduct a multiphase pilot program to develop a flowsheet to recover zinc sulfate monohydrate using a bulk sample from the Company's Lone Mountain zinc project, produce commercial grade zinc sulfate monohydrate product samples, and provide process plant capital and operating cost estimates.

Nevada Zinc will provide a bulk sample from its Lone Mountain project site in Eureka County, Nevada. The scope of work, which will commence this month, will be conducted in four main phases:

1. Preliminary assessment and review of recovering and purifying zinc from the bulk sample containing zinc carbonate and silicate mineralization. A conceptual flowsheet will be generated based on the review and findings;
2. The conceptual flowsheet steps will be carried out on a small scale to establish the efficacy of the proposed unit operations and to develop target conditions for each step;
3. A bulk operation will be conducted to produce approximately 150 lbs. of a commercial grade zinc sulfate monohydrate product (ZnSO4·H2O); and
4. An economic evaluation of the production process will be performed to provide estimates for both process plant capital costs and operating costs.

For more than 55 years, Hazen has provided chemical analyses, bench-scale experiments, continuous pilot plant demonstration, and field and other services. Hazen designs flowsheets and reduces scale-up risks for commercial plants throughout the world.

Mr. Max Vichniakov, President and CEO commented, "We are very excited by our progress with the Lone Mountain zinc project and the engagement of a reputable firm like Hazen. The level of work to be carried out by Hazen amounts to a small-scale pilot plant demonstration and will further de-disk our project on the processing side. This program will allow us to produce zinc sulfate bulk samples to showcase to the industry as well as our strategic partners and also help us to determine process plant operating and capital costs. North American agricultural markets have been experiencing an upbeat momentum with rising crop and crop input prices over the recent months and showing positive demand outlook. In this market environment, we believe Nevada Zinc is uniquely positioned to capitalize on its integrated "mine, process, end-user product" strategy in the zinc sulfate products markets for the US agricultural sector. The pilot program represents a significant milestone for Nevada Zinc and further advances our highly prospective Lone Mountain zinc project."

The program is expected to take approximately six months to complete. The Company looks forward to providing regular updates and announcing results from the pilot program as soon as they become available.