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China extends war on pollution; next target - steel waste

Industry recycles less than a third of its slag compared to a 98% rate in Japan

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Major steelmaker Anshan Iron and Steel has invested around 1 billion yuan on eight slag processing lines, but many Chinese mills don't have slag recycling plants.

Anshan, China

CHINA'S self-styled war on pollution is extending to a new front: the solid waste that makes up thousands of slag heaps around the country, a byproduct of its record steel output.

Beijing has been fighting to clean up the nation after years of breakneck economic growth took their toll on the environment, with its massive steel sector bearing the brunt of its vigorous campaign.

Hundreds of steel mills have been shut over the last few years for failing to comply with tougher environmental rules, with others forced to install better equipment to curb emissions and use higher-quality raw materials such as iron ore and coking coal.

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But now industrial debris like slag is increasingly coming under the spotlight as well, potentially pressing steelmakers to tackle the pilings problems head-on at a time when they are grappling with weaker profit-margins.

The world's top crude steel producer, which last year made a record 831.7 million tonnes of the material, churns out over 100 million tonnes of steel slag annually.

However, the industry recycles less than a third of that waste into products such as cement or concrete, leaving the rest stacked in heaps or dumped illegally.

That compares to slag utilisation rates of around 98 per cent in Japan and 87 per cent in Europe, the University of Science and Technology Beijing said in a study published in June.

"This dumped slag has damaged farmland and added pollution to the water and air," the USTB study said.

Underscoring the government's ramped-up drive against steel waste, this year it began imposing a blanket 25 yuan (S$5) levy for every tonne of solid waste generated by industrial companies. That runs to 12.5 million yuan for a mill that produces 500,000 tonnes of slag a year.

China has also intensified its "name and shame" tactics, saying in June that the country's No 3 steelmaker, Jiangsu Shagang Group, had dumped millions of tonnes of untreated waste, including slag, in landfills near the banks of the Yangtze River, contaminating nearby soil and water.

In response, the steelmaker pledged to build a 2 billion yuan slag treatment plant.

Last month, the environment ministry accused mid-sized steelmaker Gaoyi Iron and Steel of illegally dumping large amounts of steel slag over a decade. A person who answered the phone at Gaoyi Steel said the company was working to rectify the issue, but declined to give details.

The environment ministry also said it would urge local governments to deal with solid waste issues, undertaking a special campaign to crack down on violations. It did not give further details.

Some producers have already taken steps to fight the problem.

Major steelmaker Anshan Iron and Steel Group (Ansteel) has invested around 1 billion yuan on eight slag processing lines with a total capacity of 11 million tonnes, Zhang Hewu, general manager at company unit Ansteel Green Resources Technology, told Reuters.

He said those facilities turn most waste into products such as cement and road construction materials, leaving only about 10 per cent to be stored.

The recycled products are mainly sold in China, with some going to Singapore, Qatar, South Korea and the United States, Mr Zhang said.

Unlike Ansteel, many Chinese mills don't have slag recycling plants, which global firm Harsco Metals & Minerals says is boosting its business processing and recycling slag.

"Job opportunities (for the firm) have risen significantly since the beginning of this year," said Zhang Yan, China head at Harsco Metals & Minerals, part of diversified firm Harsco Corp .

Harsco handles slag for state-owned mills with total steel production capacity of nearly 40 million tonnes, including a new contract for an 8.5-million tonne mill, Mr Zhang said, adding that the firm was also getting enquiries from private steelmakers.

There is a lack of financial incentive, however, for companies to recycle slag, particularly in less developed areas in China, he said.

A person close to the solid waste department at the environment ministry said targetting such waste is also more difficult than tackling direct air or water pollution, where devices can be used to monitor emissions.

"For solid waste, you can't send inspectors to monitor a company for 24 hours and see if they dump their trash illegally," he said, declining to be identified due to the sensitivity of the matter. REUTERS