* More Chinese mills may shut on weak demand, pollution controls
* Iron ore down towards $40/tonne
* Angang Steel reviewing future of $2 bln mine amid price slump (Adds Angang Steel, China steel outlook, updates prices)
By Manolo Serapio Jr
MANILA, Jan 12 (Reuters) - Iron ore futures in China and Singapore dropped on Tuesday, extending recent losses on fears of more Chinese steel producers shutting, which could deepen a glut in the raw material.
Weak demand and tighter anti-pollution measures threaten to close more mills in China's top steel producing Hebei province either temporarily or permanently, said Helen Lau, an analyst at Argonaut Securities in Hong Kong.
"On the other hand, there's no sign of the big iron ore miners cutting production. They're even raising exports to China," said Lau, referring to top suppliers from Australia and Brazil.
Iron ore for May delivery on the Dalian Commodity Exchange closed down 2.6 percent at 300.50 yuan ($46) a tonne, after hitting a low of 299.50 yuan, its weakest since Dec. 18.
On the Singapore Exchange, February iron ore SZZFG6 fell 2 percent to $36.60 a tonne.
That suggests further weakness for spot prices that have dropped back near $40 a tonne.
Iron ore for immediate delivery to China's Tianjin port .IO62-CNI=SI slid 1.5 percent to $40.90 a tonne on Monday, according to The Steel Index (TSI). The spot benchmark fell to $37 in December, the lowest recorded by TSI which began compiling data in 2008.
China's Angang Steel Co Ltd 000898.SZ is reviewing the future of its A$3 billion ($2 billion) Karara iron ore mine, which could become the latest victim of a global slump in iron ore prices. decline in Dalian futures has undermined confidence in the spot market, TSI said, with transactions few and far between.
As Chinese mills cut output in response to slow demand, traders are similarly running down their stocks instead of replenishing as they did in past years in anticipation of demand picking up after the Lunar New Year in February, said Lau.
The inventory of five major steel products held by Chinese traders stood at 8.56 million tonnes as of Jan. 8, according to consultancy Mysteel. That is the lowest level since February 2009, said Lau.
"This shows that traders have no confidence in future demand," she said.
The production cuts have barely supported steel prices. The most-traded rebar, a construction steel product, on the Shanghai Futures Exchange SRBcv1 slipped to a two-week low of 1,739 yuan a tonne on Tuesday.
China's steel production and demand are expected to continue to decline this year, the China Iron and Steel Association said, without giving actual estimates. and iron ore prices at 0709 GMT
Contract
Last
Change Pct Change SHFE REBAR MAY6
1741
-21.00
-1.19 DALIAN IRON ORE DCE DCIO MAY6
300.5
-8.00
-2.59 SGX IRON ORE FUTURES FEB
36.6
-0.75
-2.01 THE STEEL INDEX 62 PCT INDEX
40.9
-0.60
-1.45 METAL BULLETIN INDEX
41.31
-0.82
-1.95
Dalian iron ore and Shanghai rebar in yuan/tonne Index in dollars/tonne, show close for the previous trading day ($1 = 6.5749 Chinese yuan) ($1 = 1.4378 Australian dollars)