Archive for the ‘alumina’ Category

Aluminium smelter news

Saturday, August 14th, 2010

News from around the industry.

UC Rusal has announced that they will resume construction of its Boguchany smelter. Phase one, comprising 147,000t, will commence operations in 2013.

Garmco has shelved plans to build a rolling mill in the Sohar precinct, instead focusing on their existing plant in Bahrain.

A consortium of Japanese investors is looking to take a stake in the part-Japanese owned smelter in Indonesia. The Indonesian government has been looking to increase its holding in the operation, prompting the Japanese to increase their own position.

Chalco is said to be about to raise its price for domestic alumina, in light of continued strength in the primary aluminium industry. This is despite imports almost doubling in July, from 140,000t in June, to 270,000t last month. The Chalco price for alumina currently stands at RMB2650. The talk is that the price will rise to RMB2800.

Weiqiao looking at IPO

Wednesday, August 11th, 2010

The following article comes from Reuters.

Weiqiao Aluminum, China’s largest private alumina producer by capacity, has submitted a listing application to Hong Kong’s stock exchange aiming to raise about $1 billion, the Ming Pao Daily News reported on Wednesday,

Shandong-based Weiqiao Aluminum, competing with Aluminum Corp of China Ltd (Chalco), was expected to launch its initial public offering in October, the newspaper cited market sources as saying.

Investment banks JP Morgan and ICBC International, were handling the deal, the newspaper reported, without giving further details.

The parent of Weiqiao Aluminum also controlled Hong Kong-listed cotton yarn and fabric maker Weiqiao Textile Co Ltd, the newspaper said.

Bacteria-treated alumina – more information

Friday, July 23rd, 2010

Naomi McSweeny, the scientist mentioned in the article we posted earlier this week, has kindly answered some of my dumb questions about the process and her breakthrough.

As I explained to Naomi, my knowledge of alumina is that arrives at smelters in big ships.   But I will try to bring her answers in a way which helps readers get what it’s about.

Naomi tells me that sodium oxalate is one of the major impurities that must be removed in the process of refining bauxite into alumina.    Her breakthrough is that she has not only invented an organic way of doing this, she has identified the particular bacterium that does the job.

At the moment it is removed by showering the part-processed material with more oxalate so that the impurities can be washed out.   But then the sodium oxalate has to be stored, as it is not a nice chemical.     Another way is to heat the material, but this is costly and adds to the CO2 equation.

I will let Naomi speak for herself.   “Instead of the need to store the sodium oxalate (which usually happens in very expensive, confined concrete ponds), the addition of the biological process at this stage of the cycle removes the need to store and also the capital funding required to build these storage facilities.”

“Processes for the biological degradation of oxalate have been previously patented (you can Google them and find them). The difference between those studies and this one is that no one has really defined the microbial populations that are responsible for the degradation. Everyone has taken a very “engineering” point of view – in that they have this idea, they implement it, it works at pilot-scale and so they start a full-scale process without really knowing the biology of the system and in some cases the science know-how and availability of techniques good enough to characterise the bacteria were just not available.”

“This research has not only defined the microbial ecology of the process, but isolated the key oxalate-degrading bacteria. And that is what the media release and the Fresh Science award were about. The description and characterisation of the novel bugs that I have isolated will mean that the process can be replicated at other sites around the world, especially refineries which have low-grade ore associated with high concentrations of humic and fulvic materials like here in Western Australia.”

From her email, I understand that it does not change the equation when it comes to the ratio of bauxite to alumina, nor of the amount of red mud produced, but it does lower the capital and operating cost of making alumina, as well as reduce the environmental impact of alumina refining.

No wonder she has won awards for her research.   Naomi tells me she is a PhD student.   Looks like that’s in the bag.

Anyone interested in contacting Naomi, she has posted her email address in our comments section.

Alumina breakthrough by bacteria

Monday, July 19th, 2010

A colleague forwarded this story to me.   It comes from “Fresh Science”.   The information in the article is presented as is – I have no way of verifying if this is really a game-changing technology, though if the story is to be believed, then it seems pretty important.

 

Previously unknown species of naturally-occurring bacteria have the potential to save the alumina and aluminium industries millions of dollars while helping to reduce their impact on the environment, microbiologist Naomi McSweeney has found in a collaborative project between Alcoa of Australia, CSIRO and the University of Western Australia.

The bacteria can successfully break down and remove sodium oxalate, an organic impurity produced during the refining of low-grade bauxite into alumina. The work is being presented for the first time in public through Fresh Science, a national competition for early-career scientists. Naomi was one of 16 winners from across Australia.

At a typical refinery, sodium oxalate forms by the tonne during the production of alumina. It can affect the colour and the quality of the final product.

“Oxalate can be removed by combustion, but this process releases excess carbon dioxide”, Naomi says. The impurity may also be stored but this represents a major cost to refineries so treatment is a preferred option.

Alcoa of Australia has designed and installed an innovative large-scale bioreactor which has the capability to remove about 40 tonnes a day of sodium oxalate produced at its Kwinana refinery south of Perth in Western Australia.

“Using bacteria to break down and remove oxalate is a better, more sustainable alternative.” The bacterial process breaks down the sodium oxalate and produces significantly less carbon dioxide whilst avoiding the need to store the impurity.

Naomi has worked with researchers from Alcoa’s global Technology Delivery Group and the CSIRO’s Light Metals Flagship to identify the main bacteria involved in degrading the oxalate within the bioreactor. They used DNA fingerprinting techniques to pick out the key players. What they found was a potentially new genus of Proteobacteria and a new species of the known genus Halomonas which are able to use the carbon in the oxalate to grow.

“Oxalates, and bacteria that feed on them, are common in nature -for example in our food, in our guts and in the root systems of plants such as rhubarb,” says Naomi. “However, these oxalate-degrading microorganisms were not the ones we found in the bioreactor.” The bacteria doing most of the work in the bioreactor have never been found before.

To enhance the efficiency of the bio-removal process, the researchers are now determining the best conditions for growing these bacteria. Alcoa is seeking to apply the process to other refineries around the world, and hopes it will be able to use it to treat previously stockpiled oxalate.

Chalco resumes all idle alumina, aluminium capacity

Monday, December 14th, 2009

The following article appeared in several online journals.   This one is from Interactive Investor.

Aluminum Corp of China Ltd (Chalco), the top aluminium group in China, has resumed all idle capacity of alumina and aluminium, boosting production, company executives said on Monday. “We have basically resumed all idle capacity,” Lu Youqing, vice president of Chinalco, the parent of Chalco, told Reuters. Chalco has annual capacity of 4 million tonnes of primary aluminium and 11 million tonnes of alumina, the main material for aluminium production. “(The restarts) were based on market conditions,” said Liu Qiang, Chalco’s board secretary.

Alumina market to tend towards surplus in 2010

Wednesday, November 18th, 2009

The following article comes from China Mining.

Alumina producers will continue to exercise restraint all next year, but the market will be in surplus as output is still likely to outpace aluminum smelter needs.
Recent restarts and new capacity will ensure ample supplies of the intermediate material, used to produce primary aluminum. This will act as a cap on prices and, if anything, they will drift lower.
Ralston Johnson of Brook Hunt, the metals arm of consultancy Wood Mackenzie, said he expected the alumina market to record a 1.0 to 1.5 million tonnes surplus next year.
“The surplus will be large enough for people to know that alumina is readily available, that there’s no shortage,” Johnson told Reuters.
Outside top aluminum producer China, he predicted little demand for the material from reactivations of smelter capacity, mothballed after the slump in global aluminum consumption from the key car and construction industries.
But he thought alumina producers could moderate their output to reduce over-supply if prices trended below costs.
“I don’t expect prices to revisit the March lows,” Johnson added, predicting an average of $270 a tonne next year.
By March, in the depths of the global economic crisis, spot alumina prices had fallen to around $180 a tonne.
They have recovered in recent months and stand at around $300 a tonne on an Australia FOB basis, due partly to production cuts, as well as higher energy and aluminum prices.
Stronger aluminum prices help to support prices for alumina sold through long-term contracts — which are normally settled at 12-13 percent of the London Metal Exchange (LME) cash aluminum price.
Global aluminum prices rose sharply after falling to a seven-year low of $1,279 a tonne in late February.
By August, the LME three-months price had risen to $2,115 and has since held on to most of those gains. At 1220 GMT they were indicated at $2,032/42 a tonne.
Some analysts expect production and smelter demand for alumina to be evenly matched and limit price declines in 2010.
“Alumina prices are not going to move too far from current levels,” said Nikhil Shah, of industry consultants CRU Group.
“I don’t think we’re going to see prices significantly below $250/260 a tonne. There’s good support above that level.”

CHINA ACTS QUICKLY

Independent consultant James King said swift cutbacks by marginal producer China had prevented prices falling even lower than the $180 reached in March.
In a real slump they could have dropped as low as $130.
“Chinese producers open and close more rapidly than Western producers. Their behavior has stabilized the market. It’s probably why prices are where they are now,” he said.
King forecasts global smelter grade alumina output will rise to 77.65 million tonnes next year from 71.6 million this year. Consumption by smelters in 2010 would be lower at around 75.2 million tonnes.
NEW CAPACITY

A large amount of new alumina refinery capacity is set to come on stream in the next few years, mainly in Brazil, but also in China, Australia and India.
Some 16.0 million tonnes per year could be added by 2013, which means some capacity idled in the recent downturn might need to stay closed permanently, according to King.
“There may well be permanent shutdowns in the U.S., Canada and Western Europe, but not Australia, Jamaica and Suriname,” he said, suggesting partial reductions rather than full scale refinery closures.
For now he estimated around 92 percent of the industry was covering operating costs at current price levels, with 82 percent covering total costs.
Alumina restarts in China are being absorbed by domestic smelter demand growth, but outside there it’s a somewhat different picture.
Johnson referred to recent restarts of mothballed production in Canada, the United States, Ireland and Romania.
“There’s not much in the way of metal restarts to soak that up,” he said.

Chalco postpones final decision on Queensland alumina refinery

Tuesday, November 10th, 2009

The following story is from the Australian newspaper yesterday.

CHINESE aluminium giant Chalco has pushed back a decision on building a A$2.2 billion (US$2bn)alumina refinery at the Queensland town of Bowen, saying alumina markets are still uncertain and unlikely to recover for years.

Chalco, the listed arm of failed Rio Tinto suitor Chinalco, said a long-awaited decision on mining bauxite at Aurukun at Cape York and refining it at Bowen, previously slated for September or October, would not be made this year.

“The major challenge (to a refinery and mine operation) is a fundamental change to the economic landscape from two years ago,” Dan Foo, Chalco’s Australia-based head of the mine study, told The Australian yesterday.

“We envision it will take some years before we see a recovery (in alumina markets) to pre-global economic crisis levels.”

Mr Foo said Chalco was in the final stages of evaluation of the mine and refinery.

A decision would be made in the next few months but not before the end of the year, he said.

Queensland stripped the lucrative bauxite deposits near Aurukun from Pechiney in 2004 because they were not being developed.

They were awarded to Chalco on the proviso that a refinery was built, meaning any government-sanctioned decision to allow mining but not a refinery is likely to draw the ire of the failed bidders for the deposits at the time.

Chalco has been quiet on its plans for the refinery since Rio’s June decision to walk away from a $US19.5bn deal that would have given Chinalco an 18 per cent stake in Rio and a 50 per cent stake in the Yarwun alumina refinery at Gladstone, among other asset stakes.

In May, when the Rio deal was still on the table, Chalco told the Bligh government the global financial crisis had weakened the case for a stand-alone refinery. Instead, an alternative option at the time was to join with Rio in expanding Yarwun to process the bauxite.

Both companies recently declined to comment on whether they were in talks about jointly developing or processing their neighbouring Cape York bauxite deposits. “Chalco is committed to a long-term investment in Australia and is here for the long run but we stress that this investment must make sense,” Mr Foo said.