Light Non-ferrous Metal Smelting Workers

How to become an Alumina Refinery Operator

Official Chinese title (2022 occupational classification): 氧化铝制取工

Also called: Slurry Batching Operator, Clarification Operator, Aluminium Hydroxide Precipitation Operator, Alumina Calcination Operator, Clinker Sintering Operator, Sinter Process Leaching Operator, Pregnant Liquor Desilication Operator, Spent Liquor Evaporation Operator

Operates kilns, digesters and other equipment to process bauxite and other raw materials into alumina.

Main tasks

Crushing and blending bauxite
Grinding ore into raw slurry
Sintering raw slurry into clinker and crushing the clinker to make leach slurry
Reacting in high pressure digesters to produce sodium aluminate solution
Separating solids from liquids in leach slurry, washing red mud and clarifying pregnant liquor
Desilicating sodium aluminate solution under heat and pressure
Precipitating aluminium hydroxide in precipitation tanks
Evaporating and concentrating spent liquor
Calcining aluminium hydroxide into alumina
Making pseudo boehmite and extracting gallium and other metals from process liquors
Testing the physical and chemical properties of materials and products
Maintaining equipment, clearing faults and keeping production records

Pay · AI and this job

Median pay in China: CN¥68,000 a year (2025).
Middle half: CN¥51,700 to CN¥90,000. One in ten earn less than CN¥42,200 and one in ten more than CN¥114,500.
This is the figure for the mid group Metal Smelting and Rolling Workers, not for this job alone.
National figure: wage prices of enterprise employees from the Ministry of Human Resources and Social Security (MOHRSS) enterprise pay survey. The public sector and the self-employed are not covered.
Guangzhou only: median CN¥81,955 a year (2025), middle half CN¥54,000 to CN¥99,488.
This is the figure for the mid group Metal Smelting and Rolling Workers, not for this job alone.
Generative AI can do relatively little of this work, by the ILO's global estimate.

Who does this work

The census group Metal Smelting and Rolling Workers holds 0.3% of everyone employed in China; 16.8% of its workers are women (2020 Census).
30.9% are under 35, 60.2% are 35 to 54 and 8.8% are 55 or older. The middle age band is 40 to 44.
Census figures for the whole mid group (2020 long-form sample), not for this job alone.

Questions people ask

How much does an Alumina Refinery Operator earn in China?

Across China, the median pay of enterprise employees is CN¥68,000 a year (Ministry of Human Resources and Social Security (MOHRSS), 2025). The public sector and the self-employed are not covered. It is the figure for the mid group Metal Smelting and Rolling Workers. In Guangzhou alone it is CN¥81,955 a year (2025).

Will AI change the work of an Alumina Refinery Operator?

Generative AI can do relatively little of this work, by the ILO's global estimate.

Sources

Ministry of Human Resources and Social Security (MOHRSS): 2025 enterprise pay survey information: wage prices of enterprise employees by occupation mid group, and digital occupations (P10 to P90 annual CNY) (2025 (published 2026-07-08)), retrieved 5 October 2026
Guangzhou Human Resources and Social Security Bureau: Guangzhou 2025 labour market wage prices (P10 to P90 annual CNY by occupation) (2025 (enterprise pay survey)), retrieved 4 October 2026
National Bureau of Statistics of China: China Population Census Yearbook 2020, long-form tables 4-6 and 4-7 (employed by occupation mid group, sex, age) (2020 Census long form (10% sample)), retrieved 4 October 2026
International Labour Organization, Generative AI and Jobs: A Refined Global Index of Occupational Exposure (ILO Working Paper 140, Gmyrek et al.) (ILO Working Paper 140, May 2025, Annex Table A1), CC BY 4.0, retrieved 4 October 2026

Sources: Occupational Classification of the People's Republic of China (2022 edition, public consultation draft), Ministry of Human Resources and Social Security, State Administration for Market Regulation and National Bureau of Statistics; Ministry of Human Resources and Social Security, 2025 enterprise pay survey information; Guangzhou Human Resources and Social Security Bureau, 2025 labour market wage prices; National Bureau of Statistics of China (www.stats.gov.cn), 2020 Population Census yearbook; Ministry of Education, vocational education major profiles (2022 revision) and undergraduate major catalogue (2025); Ministry of Human Resources and Social Security, national vocational qualifications catalogue (2021); O*NET interest scores (CC BY 4.0); ILO global generative AI exposure index (CC BY 4.0). Figures processed by Peernovo. English text, translations and the matching of occupations to ISCO-08, majors, degree fields and qualifications by Peernovo.

Descriptions and tasks are Peernovo's own words, written from the facts in the Occupational Classification of the People's Republic of China (2022 edition). Job titles and work types are the classification's own.

Updated 5 October 2026