Tag: Metallurgical Acid

BHP has awarded a significant engineering, procurement, and construction management (EPCM) contract to a joint venture between Fluor Australia Pty Ltd and Hatch Pty Ltd. The A$40 million contract is for the first phase of the proposed expansion of BHP's copper smelter and refinery facilities in South Australia, as the company moves towards a final investment decision on the smelter and refinery expansion, currently anticipated in the first half of FY27. The initial stage focuses on strategic planning and development during the project's study phases. Subsequent stages will cover detailed engineering, procurement, and construction management as the project advances.

Aurubis AG has reported operating earnings before taxes of euro130 million ($134.8 million) for the first quarter of its fiscal year 2024/25, up around 17% on the figure for the equivalent period of last year (€111 million or $115.1 million). The company’s Custom Smelting & Products (CSP) segment posted €125 million ($129.7 million) in EBT compared with €107 million ($111 million) in the previous year. CSP comprises production facilities for processing copper concentrates as well as for manufacturing and marketing standard and specialty products, such as cathodes, wire rod, continuous cast shapes, strip products, sulphuric acid and iron silicate, via smelters in Hamburg and Pirdop, Bulgaria. The company attributes the higher EBT to higher metal prices, considerably increased sulphuric acid revenues, and robust earnings from copper product sales and lower costs, which more than compensated for a year-over-year decline in treatment and refining charges with lower concentrate throughput.

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.

A sulphuric acid plant in Northwest China is looking to capture its low-grade heat for re-use. With the support of Alfa Laval’s semi-welded plate heat exchangers and energy recovery expertise, in winter, all of the recovered low-grade heat could be put back into their system with 30% being used in production and the remaining 70% going to heating. During the summer, 14% of the energy that is no longer needed for indoor heating could be used to preheat boiler feedwater. This would enable them to significantly reduce the amount of fossil fuels used in production, without redesigning their entire factory footprint.