Current Status of Chinese Alumina Industry and SAMI s Technical Solution

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1 Jiang Yuehua, Vice President of Current Status of Chinese Alumina Industry and s Technical Solution Shenyang Aluminum & Magnesium Engineering & Research Institute Company Limited ()

2 Outline Reserves and Production of Chinese Bauxite Current Status of Chinese Alumina Industry Major Existing Problems in China s Alumina Industry s Technical Solution

3 Reserves Distribution of Chinese Bauxite 20.0% 16.60% 166 Mt 138 Mt 323 Mt 120 Mt 83 Mt 14.5% Shanxi Guangxi Guizhou Guizou Henan 38.9% 10.0% Others Total reserves of Chinese bauxite: 830 Mt

4 Mine Distribution of Chinese Bauxite Heilongjiang Jilin Xinjiang Liaoning Inner Mongolia Ningxia Shanxi Hebei Shandong Qinghai Tibet Gansu Sichuan Shaanxi Henan Hubei Anhui Jiangsu Zhejiang Guizhou Hunan Jiangxi Fujian Yunnan Guangxi Guangdong Hong Kong Hainan

5 Production Trend of Chinese Bauxite

6 Unit : Bt Metal Bulletin Exploitation Trend of Chinese Bauxite Pridicted Predicted reserve Reserves Proven reserve Reserves Shanxi Guizhou Henan Guangxi

7 Outline Reserves and Production of Chinese Bauxite Current Status of Chinese Alumina Industry Major Existing Problems in China s Alumina Industry s Technical Solution

8 Capacity Distribution of Alumina Refinery 2012,total capacity of alumina in China is 55 Mt Combination process (bauxite from China) 53% 19% 27% Bayer process (bauxite from China) Bayer process (bauxite imported)

9 Consumption of Raw Material and Power Bauxites:1.87~2.5 t/t-ao Caustic Soda Consumption (NaOH): 0.21~0.277 t/t-ao Energy Consumption:13 GJ/t-AO

10 Outline Reserves and Production of Chinese Bauxite Current Status of Chinese Alumina Industry Major Existing Problems in China s Alumina Industry s Technical Solution

11 Ore Grade Trend of Chinese Bauxite

12 BAR & Soda Consumption vs. A/S of Bauxite

13 Alumina Quality-Physical Item Unit Typical Value Chinese Value BET Specific Surface m 2 /g >65 Attrition Index % <15 26 Particle Size Distribution < 20 μm % <2 < 44 μm % <10 19 >150 μm % <5 D 50 μm Alpha Phase Conversion % 3-5 Bulk Density Loose t/m Packed t/m Angle of Repose deg 28-32

14 Outline Reserves and Production of Chinese Bauxite Current Status of Chinese Alumina Industry Major Existing Problems in China s Alumina Industry s Technical Solution

15 Bauxite Charge Increase Target A/C

16 Bauxite Charge Increase Target A/C Equilibrium Solubility of Diaspore

17 Bauxite Charge Increase Target A/C Theoretical Digestion Curves

18 Pregnant Liquor Increase Target A/C Chemical Composition of Pregnant Liquor of Sinter Process

19 Pregnant Liquor Increase Target A/C

20 Pregnant Liquor Increase Target A/C Digestion Flash tank Last FT Dilution tank Sinter process MR=~1.05 [A/S] L =~40 PGL sinter [A/S] L =100~200

21 Control Filtration Filter Aid Preparation

22 Green Liquor Filtration Filter Aid Preparation Milk of Lime (MOL) Leaf Filter Pre-coating n

23 Alumina Quality Improvement Precipitation Optimization

24 Alumina Quality Improvement Precipitation Optimization

25 Alumina Quality Improvement Precipitation Optimization

26 t-al2o3/m3 Metal Bulletin Yield vs. MR & Caustic Soda Concentration t-al 2 O 3 /m Pregnant Pregnant liquor Liquor molar Molar Ratio ratio

27 Alumina Quality Improvement Precipitation Optimization

28 Alumina Quality Improvement Precipitation Optimization

29 Alumina Quality Improvement Precipitation Optimization

30 Alumina Quality Improvement Precipitation Optimization

31 Alumina Quality Improvement Precipitation Optimization

32 Alumina Quality Improvement Precipitation Optimization

33 lumina Quality Improvement Precipitation Optimization

34 Welcome to visit Thank you!