METALS-Aluminium hits 2-1/2 year peak on China shutdowns

* LME/ShFE arb: http://tmsnrt.rs/2oQ5nm2 (Recasts, updates prices, adds details/quote; changes dateline)

LONDON, Aug 8 (Reuters) - Aluminium hit a 2-1/2 year peak on Tuesday, lifted by growing concerns over supply cuts in top producer China and an upbeat assessment of China's demand growth prospects.

China's Shandong province has ordered 3.21 million tonnes of smelting capacity to be shut, more than previously expected, as Beijing intensifies efforts to curb pollution in its bloated heavy industries.

China earlier this year ordered aluminium producers in 28 cities to slash output during winter as it fights smog with parts of the industrial Hebei province saying last week it would implement the order.

"It's enough for the market to understand that in the second half of 2017 we could see a more serious approach to capacity cuts than we had in the first," said Hamza Khan, head of commodities strategy at ING.

"We think continued infrastructure build-out in China is going to support demand," he added.

* LME ALUMINIUM: Three-month London Metal Exchange aluminium rose 1.6 percent to $1,994.50 a tonne by 1006 GMT, having earlier hit $1,995, the highest since December 2014.

"Chinas new Environmental Protection Tax Law' is due to come in on 1 January next year. The move marks a structural change in China policy and tolerance towards polluting industries and is likely to result in marked price rises for many metals," said SP Angel in a note.

* ALUMINIUM EXPORTS: China exported 440,000 tonnes of unwrought aluminium and aluminium products in July, customs said, down 4.3 percent from June but up 12.8 percent from July last year, according to Reuters calculations.

* WIDER MARKETS: Global stocks inched up to a new all-time high on Tuesday, shrugging off weaker-than-expected Chinese trade data that clouded an otherwise bright outlook for global growth.

* STEEL: Chinese steel futures dropped marginally after a seven-day rally that lifted prices to the highest level since 2013 on expectations of reduced supply in the winter due to Beijing-imposed capacity curbs.

* ZINC PRICES: Zinc, used mainly to galvanise steel, benefited from strong Chinese steel prices. It rose 0.8 percent to $2,882, having earlier hit $2,888.50, near its highest since March.

* COPPER IMPORTS: China's imports of copper and copper products rose around 8 percent in July from last year as the availability of credit improved, even as concerns lingered about manufacturing activity in the world's No.2 economy.

* COPPER PRICE: LME copper fell 0.5 percent to $6,385 a tonne after soaring to a two-year peak of $6,447.50 in the previous session.

(Additional reporting by James Regan; Editing by Adrian Croft)