The National Development and Reform Commission (NDRC) said China's alumina output growth expected to be rapid in the first half, will slow down in the second half due to weakr prices.

China produced 4.27 mln tons of alumina in the three months to March, up 53.7 pct year-on-year, while output of electrolytic aluminium rose 36.6 pct to 2.77 mln tons.

In a statement published on its website, the economic planning agency said China's current annual capacity in alumina and electrolytic aluminium is estimated at 17 mln tons and 12.5 mln tons respectively.