Exhibit 99.12

PyroGenesis Anticipates Relying on

Temporary Blanket Relief for Required Filings

MONTREAL, Quebec (GlobeNewswire – April 27, 2020) - PyroGenesis Canada Inc. (http://pyrogenesis.com) (TSX-V: PYR) (OTCQB: PYRNF) (FRA: 8PY), a high-tech company, (the "Company", the “Corporation” or "PyroGenesis") that designs, develops, manufactures and commercializes plasma atomized metal powder, plasma waste-to-energy systems and plasma torch systems, announces today that it anticipates relying on temporary blanket relief provided by the Canadian Securities Regulatory Authorities for the filing of their Financial Statements and Management’s Discussion and Analysis (“MD&A”), for the year ended December 31, 2019 (“Annual Filings”) as well as for the period ended March 31, 2020 (“Q1 2020 Filings”). This has been driven by delays encountered in the audit process and is consistent with the wider audit environment currently facing companies and audit firms throughout the world.

On March 23, the TMX Group exchanges Toronto Stock Exchange (“TSX”) and TSX Venture Exchange (“TSXV”) announced temporary blanket relief measures for listed issuers during the Coronavirus (COVID-19) pandemic. These included the allowance to delay the filing of certain continuous disclosure documents by up to 45 days, given the administrative burden on public companies and accounting firms during the current crisis, and to provide greater flexibility in dealing with market volatility.

As a result, PyroGenesis expects to file its Annual Filings on or before June 15, 2020 and its Q1 2020 Filings on or before July 16, 2020.

An update on material business developments since the filing of the Company’s interim financial reports has been provided in prior press releases.

During the period that the required filings remain outstanding, PyroGenesis' management and other insiders are subject to a trading black-out policy that reflects the principles in section 9 of National Policy 11-207 – Failure to File Cease Trade Orders and Revocations in Multiple Jurisdictions.

About PyroGenesis Canada Inc.

PyroGenesis Canada Inc., a high-tech company, is the world leader in the design, development, manufacture and commercialization of advanced plasma processes and products. We provide engineering and manufacturing expertise, cutting-edge contract research, as well as turnkey process equipment packages to the defense, metallurgical, mining, advanced materials (including 3D printing), oil & gas, and environmental industries. With a team of experienced engineers, scientists and technicians working out of our Montreal office and our 3,800 m2 manufacturing facility, PyroGenesis maintains its competitive advantage by remaining at the forefront of technology development and commercialization. Our core competencies allow PyroGenesis to lead the way in providing innovative plasma torches, plasma waste processes, high-temperature metallurgical processes, and engineering services to the global marketplace. Our operations are ISO 9001:2015 and AS9100D certified, and have been since 1997. PyroGenesis is a publicly-traded Canadian Corporation on the TSX Venture Exchange (Ticker Symbol: PYR) and on the OTCQB Marketplace. For more information, please visit www.pyrogenesis.com.

This press release contains certain forward-looking statements, including, without limitation, statements containing the words "may", "plan", "will", "estimate", "continue", "anticipate", "intend", "expect", "in the process" and other similar expressions which constitute "forward- looking information" within the meaning of applicable securities laws. Forward-looking statements reflect the Corporation's current expectation and assumptions and are subject to a number of risks and uncertainties that could cause actual results to differ materially from those anticipated. These forward-looking statements involve risks and uncertainties including, but not limited to, our expectations regarding the acceptance of our products by the market, our strategy to develop new products and enhance the capabilities of existing products, our strategy with respect to research and development, the impact of competitive products and pricing, new product development, and uncertainties related to the regulatory approval process. Such statements reflect the current views of the Corporation with respect to future events and are subject to certain risks and uncertainties and other risks detailed from time-to-time in the Corporation's ongoing filings with the securities regulatory authorities, which filings can be found at www.sedar.com, or at www.otcmarkets.com. Actual results, events, and performance may differ materially. Readers are cautioned not to place undue reliance on these forward-looking statements. The Corporation undertakes no obligation to publicly update or revise any forward- looking statements either as a result of new information, future events or otherwise, except as required by applicable securities laws. Neither the TSX Venture Exchange, its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) nor the OTCQB accepts responsibility for the adequacy or accuracy of this press release.

SOURCE PyroGenesis Canada Inc.

For further information please contact:

Rodayna Kafal, Vice President Investors Relations and Strategic Business Development

Phone: (514) 937-0002, E-mail: ir@pyrogenesis.com

RELATED LINK: http://www.pyrogenesis.com/