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    Sulphur 419 Jul-Aug 2025

    16 July 2025

    KazZinc to invest in increased SO2 recovery

    KAZAKHSTAN

    KazZinc to invest in increased SO2 recovery

    Kazakhstan Zinc (KazZinc) is progressing with plans to reduce sulphur dioxide emissions from its Ust-Kamenogorsk site following an environmental audit in December 2024 as a result of smogs caused fugitive emissions which forced residents to stay indoors. The site has reduced emissions from 69,000 t/a in 2011 to 15,000 t/a, but plans to invest $210 million in in new technologies, including sulphur dioxide recovery systems and upgraded filters for solid particle capture. The key measure is the modernisation of gas purification units which is expected to reduce SO2 emissions by 2,200 t/a by 2026. Another important initiative is the construction of the “Hydropolimet” workshop at the KazZinc Ridder metallurgical complex, which aims to reduce sulphur dioxide emissions by 714 t/a.

    Latest in Asia

    Nickel Industries starts up ENC acid plant

    Nickel Industries announced started up the sulphuric acid plant at its new Excelsior Nickel Cobalt (ENC) HPAL project in the final week of June. The ENC Project is a massive, multi-billion dollar high-pressure acid leach (HPAL) facility located in the Indonesia Morowali Industrial Park (IMIP) in Central Sulawesi, Indonesia. It is operated by Australia’s Nickel Industries to supply battery-grade materials for the electric vehicle (EV) market. At capacity, it is expected to yield roughly 72,000 t/a of contained nickel equivalent as mixed hydroxide precipitate (MHP), nickel sulphate, and nickel cathode.

    Russia bans rail transport of Kazakh sulphur

    Russia has ordered a “temporary cessation” of rail transport of all sulphur originating from Kazakhstan that is destined for Russian seaports and railway checkpoints, representing a significant policy shift, according to an official order from the Federal Agency for Railway Transport (Roszheldor). The directive, which took effect from May 26th, orders a halt to the loading and movement of Kazakh sulphur “until further notice.” While the measure is officially described as temporary, the order provides no specific timeline for when the transit might resume. The action cites instructions from Russia’s First Deputy Prime Minister, D.V. Manturov, as its basis.

    Restart for Hongda smelter

    Hongda's 100,000 t/a zinc smelter, in China's Sichuan Province, completed scheduled maintenance and equipment upgrading and officially resumed production on 21st June, the company said. The smelter had been shut down for planned maintenance since January, during which time a modernisation project for the electrolytic zinc smelting system was also carried out. Following the nearly six-month revamp, the resumption of production is expected to improve overall operational efficiency, reduce unit production costs, and increase the utilisation rate, The company said. The stable supply of sulphuric acid generated by the zinc smelter will effectively leverage the synergies of the "sulphur-phosphorus" industrial chain in the company, an help alleviate cost pressures on the company's phosphorus chemical business segment.