Metso Corporate Newsroom News 2021 Metso Outotec and HALMEK LITHIUM to construct the battery-grade lithium hydroxide process using soda leaching
Press release June 30, 2021

Metso Outotec and HALMEK LITHIUM to construct the battery-grade lithium hydroxide process using soda leaching

Metso Outotec Corporation’s press release on June 30, 2021, at 09:00 a.m. EEST

HALMEK LITHIUM has selected Metso Outotec’s patented lithium hydroxide process for production of battery-grade lithium hydroxide at their greenfield plant in the Tula region in Russia. The order value, which is not disclosed, has been booked in Metals’ Q2/2021 orders received. Metso Outotec’s scope of delivery consists of the engineering and key equipment supply for the lithium hydroxide process, the basis of which will be the Metso Outotec OKTOP® Autoclave Plant. The environmentally sound production process is one of Metso Outotec’s more than 100 Planet Positive products.

“One of the most important tasks in the project was the selection of technology. Instead of the more traditional sulfuric acid processing to produce lithium hydroxide, we decided to choose the Metso Outotec lithium hydroxide process as it is the most promising and environmentally sound process at the moment. The pilot tests conducted at the Metso Outotec Research Center in Pori, Finland, provided excellent results,” explains Pavel Galchenko, VP, Halmek Lithium.

“Metso Outotec has developed lithium hard rock-related technologies for some 20 years now. It started with the battery-grade lithium carbonate process and, when the market changed to favor lithium hydroxide, the process flowsheet was converted to directly produce battery-grade lithium hydroxide monohydrate (LHM) from spodumene. Both of the processes are patented and will be significant assets in our battery chemicals business, meeting the need to produce high-end Li-ion battery chemistries for the growing market,” says Mikko Rantaharju, Vice President, Hydrometallurgy business line at Metso Outotec.

HALMEK LITHIUM’s new hydrometallurgical plant, which will complement their existing lithium hydroxide plant, is currently under construction. As raw material, the new plant will use spodumene concentrate; it will feature a capacity of 20,000 tons per year of battery-grade lithium hydroxide monohydrate, which is used in the production of batteries for electric vehicles. The first production line is planned to start up in 2023, and the second production line with a capacity of 20,000 tons is expected to start production in 2026.

Thanks to its extensive technological know-how in minerals and metals processing, a global presence and in-house research and development centers in, for example, Germany, and Finland, Metso Outotec is well positioned to support various types of battery chemicals projects, including lithium.

Find out more about the Metso Outotec offering in battery chemicals on our website.

Further information, please contact:

Liisa Haavanlammi, Director, Battery Chemicals, Metso Outotec Corporation, tel. +358 20 529 2156, email: liisa.haavanlammi(at)

Helena Marjaranta, Vice President, Communications and Brand, Metso Outotec, tel. +358 20 484 3212, email: helena.marjaranta(at)

Metso Outotec is a frontrunner in sustainable technologies, end-to-end solutions and services for the aggregates, minerals processing and metals refining industries globally. By improving our customers’ energy and water efficiency, increasing their productivity, and reducing environmental risks with our product and process expertise, we are the partner for positive change.  

Metso Outotec is committed to limiting global warming to 1.5°C with Science Based Targets. We ranked 8th on the 2021 Global 100 list of the world’s most sustainable companies.

Headquartered in Helsinki, Finland, Metso Outotec employs over 15,000 people in more than 50 countries and its sales for 2020 were about EUR 3.9 billion. The company is listed on the Nasdaq Helsinki.,