Tag: Metallurgical Acid

Glencore says it is working with the Queensland government to secure the future of the Mount Isa copper smelter. The company had previously indicated that it would close the smelter in 2030, but recent media reports suggest that the government is looking at assistance to keep the smelter operational, which currently treats more than 1 million t/a of copper concentrate and supplies sulphuric acid to other industries locally, including phosphate production.

The Chinese government has issued a development plan for the country’s copper smelting industry covering the years 202527 which is looking to reduce the level of overcapacity in the sector. New copper smelters must now control sufficient copper mine supply via ownership or equity stakes to cover their production requirements, something few smelters do at present. Chinese smelter output has reached record levels, with treatment charges falling to historically low levels as producers compete for copper concentrate – China imports around 85% of its copper concentrate. Meanwhile more smelter capacity is planned, with around 1 million t/a of new capacity scheduled for 2025. The country aims to boost domestic copper mine resources by 5% to 10% in three years to secure raw material supply, according to the government plan. China will also encourage copper smelters to sign long-term purchase agreements with global miners, boost imports of copper blister and anode, and encourage scrap imports.

Metso has launched its new Cu POX leaching process for the copper extraction industry. The company says that, as ore compositions change due to depletion of deposits and increasing environmental and efficiency demands, this solution not only maximises copper recovery but also reduces environmental impact.

A complete listing of all articles and news items that appeared in Sulphur magazine during 2024.

India’s phosphate production is using increasing volumes of sulphuric acid, but new domestic smelter and sulphur burning acid capacity may mean reduced imports in future.

Short term supply constraints are dominating acid markets at present, but increasing smelter production across Asia may lead to oversupply in the longer term.

One of the biggest areas for new sulphuric acid demand in the past few years has been in nickel processing plants, particularly in Indonesia. A decade ago, incoming president Joko Widodo took a strategic decision that the country needed to try and capture more of the value chain from its mining and mineral industry, which was focused at the time on exports of aluminium, copper and nickel ores and concentrates, mainly to China. Over the past 10 years, the export of raw ores has been progressively restricted and companies instead compelled to build downstream processing plants for the metals. With China the main recipient of Indonesian ores, much of the investment in metals processing in Indonesia has been via Chinese companies.

The implementation of WSA technology to recover sulphur as sulphuric acid from lean sulphurous off-gases offers significant environmental benefits. These include waste reduction, resource efficiency and reduced overall CO2 e footprint, while also producing profitable sulphuric acid. By embracing such practices, industries can ensure improved or better consumption and production patterns and foster a more sustainable and responsible future. J. Feddersen and S. S. Johansson of Topsoe illustrate these benefits using three distinct industrial applications where WSA technology provides a smarter way to treat sulphurous off-gases. It is not only waste stream management in the three cases, but also reduced transportation of chemicals, reduced opex and reduced CO2 e footprint.

Alfa Laval reports on a case study of a sulphuric acid plant in Northwest China that is looking to capture its low-grade heat for re-use and to significantly reduce the amount of fossil fuels used in production.

In 2019 Topsoe launched its ClearView™ technology for WSA and SNOx sulphuric acid plants. This article focuses on the results and learnings from the first implementation of ClearView™ at a new WSA plant at Anglo American Platinum’s Polokwane smelter in South Africa.