* China's output of lead and zinc in July rose more slowly than expected from the prior month due to restrictions on power use in key production hubs, state-backed research house Antaike said on Tuesday.

* Refined zinc and zinc alloy production from 51 smelters surveyed was 461,000 tonnes last month; that was up 9,700 tonnes from June and up 7.1% year-on-year, although average daily output fell 1.1% on the month.

* Ongoing curbs on power consumption by smelters in Yunnan, which only boosted output by 12,000 tonnes month-on-month, as well as new measures in Guangxi and maintenance elsewhere kept supply levels down. 

* With some power restrictions continuing in August, this month's zinc output is seen decreasing by 13,000 tonnes to 448,000 tonnes, Antaike said.

* Refined lead output from China's major smelters in July was 425,000 tonnes, up 4.7% year-on-year but up only 12,000 tonnes from June, Antaike said, noting power curbs, extreme weather and coronavirus containment measures had hit growth.

* August output is set to rise above 430,000 tonnes, it added.

(Reporting by Tom Daly. Editing by Jane Merriman) ((tom.daly@thomsonreuters.com; +86 10 5669 2119;))