
Copper Futures broke above the 50 day moving average on Tuesday.
``At this stage we have no impact on our Antamina operations,'' Mark Lidiard, a London-based spokesman for BHP Billiton, said today in an e-mail. Melbourne, Australia-based BHP Billiton owns 33.75 percent of Antamina, Peru's largest copper mine. Xstrata Plc, based in Zug, Switzerland, holds a matching stake.
China's imports of refined copper, anode and copper alloy in April stood at 304,672 tons.
That was down by 6.5 percent from March's record of 307,740 tons but exceeded expectations.
Nickel prices gained $1,800 to $50,850 a tonCopper for three-months delivery on the London Metal Exchange fell to a session low of $7,820 a tonne before recovering to $7,900/7,910 at 0931 GMT, still down around 0.7 percent from Friday.
"Freeport McMoRan has reached a wage agreement with workers at its Indonesian Grasberg mine...This is going to ease the tight supply situation and thus weighs on copper," Dresdner Kleinwort said in a research note.
A four-day strike at the Indonesian Grasberg mine of Freeport-McMoRan Copper & Gold Inc. lifted copper prices above $8,000 last week but conditions are now returning to normal, the company said on Monday.
"During the strike our production was below average but with the situation normalising, we hope that production can return to normal," Mindo Pangaribuan, a spokesman for Freeport said.
The company will meet copper and gold output targets this year at its Grasberg mine despite the stoppage, a senior official at Indonesia's mines and energy ministry said on Monday.
Copper for three-month delivery on the London Metal Exchange rose to a session high of $7,928, but came off in the afternoon on profit taking and ended at $7,730, still up $25 from Friday.
At 1.15 pm, LME copper for three-month delivery was down at 5,540 usd a tonne against 5,580 usd at the close Friday.
Neil Buxton, managing director of GFMS Metals Consulting, said the market is not too worried about the rise in Chinese imports because global inventories are rising at the same time.
'There seems to be sufficient production available for the market to absorb higher Chinese demand,' he said.
The LME said in a daily report earlier inventories held in its warehouse rose by 425 tonnes to 216,050 tonnes. LME stocks have more than doubled since the start of last year.
Buxton said he expects copper might edge higher this week because there are some supportive factors in the market such as the possibility of strike action at Southern Copper's smelter in Peru.
A union at the smelter has set a strike deadline for Feb 19. It is expected to enter into new talks with Southern Copper this week.
'I think in the short term we might see some upward movement but I think there has to be quite a lot of bullish news around to turn around the overall downtrend in copper,' Buxton said.
Tin surged to 12,550 usd a tonne, after hitting a new all-time high of 12,750 usd earlier, after newswires reported at the weekend three directors at tin miner PT Koba Tin had been arrested on counts of illegal tin mining.
The company has also suspended shipments from the island of Bangka in Indonesia.
'I think the critical point is ... there aren't any other producers that can fill the gap being left by lower Indonesian production so further spikes don't come as a surprise,' Buxton said.
Separately, tin remains supported by news out Friday the Bolivian government has seized control of a tin smelter complex owned by Glencore.
In other metals, nickel was up at 36,390 usd a tonne against 36,150 usd, zinc rose to 3,140 usd from 3,130 usd, aluminium edged up to 2,702 usd against 2,700 usd while lead climbed to 1,660 usd from 1,615 usd.
The Zambian government proposed Friday to raise a tax on mining companies, aimed at helping the copper-rich but impoverished nation cash in on high global copper prices.
Finance Minister Ng'andu Magande said the government planned to negotiate with the mining companies on tax revisions.
But more than 70 percent of the population still lives in poverty, which has led to frustration with policies of recently re-elected President Levy Mwanawasa, evidenced in last year's bitter presidential elections. The distribution of copper benefits has become a key element of that debate.
Magande said the government wants to increase the country's royalty tax on copper earnings from 0.6 percent to 3 percent, increase the company income tax from 25 to 30 percent, and reintroduce a 15 percent withholding tax on dividends, interest, royalties and other mining sector transactions.
The existing 0.6 percent royalty tax, which is particularly low compared with taxes in other copper-producing countries, was put in place during an industry downturn early in the decade, when the Zambian government was desperate to attract foreign investment. Copper accounts for more than 60 percent of the southern African nation's exports.
Copper prices have since risen from less than US$1 per pound to more than US$3 per pound (about €5 per kilogram), driven in large part by growing demand from China. Zambian copper production rose by 7.9 percent in 2006, Magande said, from 459,324 metric tons to 492,016 metric tons. The mining industry now directly employs almost 50,000 people in Zambia, he said.
"At the time when copper prices on the international market were low, mining companies were offered tax concessions in order to make their projects viable," Magande said in prepared remarks. "Now that the prices are high, there is need to review these concessions so that the nation can benefit from increased earnings from the mining companies."
Talk of revising the copper tax has raised fears, however, of a backlash among foreign mining companies many of which entered into long-term contracts with the government.
Magande said the government would now seek negotiations with those companies "so that there is mutual consent by contracting parties to revise the tax regime to the new rates."