Primary aluminium output for December was 3.43 million tonnes, the National Bureau of Statistics (NBS) said, up slightly from 3.41 million tonnes in November and 10.3% higher year-on-year.

Smelters' profitability also improved in December, with local industry information provider Mysteel estimating a monthly increase of 288 yuan ($42.63) a tonne in smelter profit because of higher spot prices.

On a daily basis, December output worked out to about 110,645 tonnes a day versus about 113,667 tonnes in November.

In general, 2022 brought a ramp-up in production among smelters due to a loosening of electricity use restrictions, coupled with the launch of new capacity, mainly in northern China's Inner Mongolia and in southeastern Guangxi and Yunnan provinces.

December production of 10 nonferrous metals - including copper, aluminium, lead, zinc and nickel - rose 7.3% from a year earlier to 5.95 million tonnes.

Output for the full year was up 4.3% at 67.74 million tonnes, a record high. The other non-ferrous metals are tin, antimony, mercury, magnesium and titanium.

($1 = 6.7565 Chinese yuan renminbi)

(Reporting by Siyi Liu and Dominique Patton; Editing by Edmund Klamann)