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Cement output may take green channel
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A new Australian technology that converts blast furnace waste into an ingredient for cement is being trialed for commercial use in China.
Dry Slag Granulation cuts water use and greenhouse gas emissions and is the focus of a partnership unveiled yesterday between Australia’s Commonwealth Scientific and Industrial Research Organisation (CSIRO), and Beijing MCC Equipment Research & Design Corp.
Moving the DSG technology to an industrial scale is a landmark for Australia-China research collaboration and environmentally friendly metal production, said Jonathan Law, CSIRO’s director of the mineral resources flagship.
“Our collaboration is an exciting step toward the uptake of an innovation with real prospects of transforming the productivity and environmental performance of global iron smelting,” Law said.
“The benefits from the wide uptake of DSG technology on blast furnaces will be profound in helping the global industry to reduce water and energy use and greenhouse gas emissions while sustaining metal production.”
The DSG technology that is fitted to blast furnaces includes a spinning disc and granulation chamber that separates molten slag into droplets under centrifugal forces, uses air to quench and solidify the droplets, and extracts a granulated slag product as well as heated air.
The “glassy” substance produced is ideal for cement production, but has much lower associated greenhouse gas emissions than cement made conventionally.
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