On a month-on-month basis, output was down 3.7%, while sales rose 3.5%.

This week, the ferrosilicon market continued to maintain stable operation.

The 2010 ferrosilicon contract price on ZCE closed at 5614 yuan per ton on September 18.

China's domestic steel margins have slumped since the start of September due to high iron ore prices and a "correction" in finished steel prices, S&P Global Platts data shows.

China's investment in property rose 11.8% year on year to Yuan 1.31 trillion ($193.8 billion) in August.

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Strong demand from the property sector was lending some support to long steel, aluminum and copper markets in September, market sources said.

This is because upward momentum in property and infrastructure, which account for over 55% of China's total steel consumption, has slowed.