1. 1 alumina industry

1.2 brief introduction of alumina production enterprises

1.2. 1 Major foreign alumina production enterprises

1.2.2 alumina production enterprises in China

1.3 bauxite resources

1.3. 1 world bauxite survey

1.3.2 Overview of China Bauxite

1.4 Basic method of alumina production

1.4. 1 Quality requirements for alumina in electrolytic aluminum smelting

1.4.2 alumina production method

1.5 alumina production by Bayer process

Basic process of alumina production by Bayer process +0.5. 1

1.5.2 classification of alumina produced by Bayer process

1.5.3 characteristics of alumina production by Bayer process

1.5.4 development and application of the improved Bayer process in China.

Properties of sodium aluminate solution and basic principle of Bayer process

2.1Na2O-a12o3-H2O system

Na2O-A1.1.30℃ System

2.1.2n2o-a12O3-H2O system at other temperatures

2.2 Stability of Sodium Aluminate Solution

2.3 Physical and chemical properties of sodium aluminate solution

2.3. Density of1sodium aluminate solution

2.3.2 Electrical conductivity of sodium aluminate solution

2.3.3 Saturated vapor pressure of sodium aluminate solution

2.3.4 Viscosity of sodium aluminate solution

2.3.5 Heat capacity and enthalpy of sodium aluminate solution

2.3.6 Heat of solution of aluminum hydroxide in alkaline solution

2.4 Structure of Sodium Aluminate Solution

2.5 the principle of Bayer process

Bayer process principle

2.5.2 Basic process of Bayer process

3 Extracting alumina from bauxite

3. Leaching performance and kinetics of1bauxite

3. 1. 1 gibbsite bauxite

3. 1.2- Dissolution of Bauxite

3. 1.3- Dissolution of Diaspore Bauxite

3.2 alumina dissolution rate, Na2O loss rate and red mud yield

3.2. 1 alumina dissolution rate

3.2.2 Red mud yield and alkali consumption

3.3 Calculation of Components in Dissolution Process

3.4 Factors affecting bauxite leaching process

Effect of dissolution temperature

3.4.2 Influence of mixing strength

3.4.3 Influence of alkali concentration in circulating mother liquor

3.4.4 Influence of molar ratio of components

3.4.5 Influence of fine grinding degree of ore

3.4.6 Effect of Dissolution Time

3.4.7 Influence of Cao and other additives on dissolution process

3.4.8 Influence of MgO on the Decomposition of Diaspore by Bayer Process

3.5 Strengthen bauxite leaching process

Mechanical activation of bauxite

3.5.2 Pre-roasting of bauxite

3.5.3 Pre-roasting of Bauxite by Magnetization

3.5.4 Pre-desilication of Bauxite Roasting

3.5.5 Bauxite Roasting and Pressurized Pre-desilication-Bayer Leaching with Excess Lime

3.5.6 High temperature hydrogen treatment of bauxite

4 Behavior of various impurities in bauxite during dissolution

4. 1 Behavior of Silicon-bearing Minerals in Dissolution

4. 1. 1 Interaction between silicon-containing minerals and alkaline solutions

4. Equilibrium Solubility of1.2sio _ 2 in Sodium Aluminate Solution

4. 1.3 Equilibrium solid phase of silicon mineral precipitation in sodium aluminate solution

4.2 Behavior of Iron-bearing Minerals in Dissolution Process

4.2. 1 Behavior of iron minerals during dissolution

4.2.2 Existing forms of iron in sodium aluminate solution

4.2.3 Effect of iron minerals on dissolution rate of alumina

4.3 Behavior of Titanium-bearing Minerals in Dissolution Process

4.3. 1 reaction of titanium mineral with solution

4.3.2 Harm of Titanium-bearing Minerals in Bauxite Leaching Process

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5 bauxite leaching technology

Formation and prevention of scar during preheating and dissolution of Bayer process pulp

7 Sharing and washing of red mud

8 seed decomposition of liquid crystal in sodium aluminate solution

9 calcination of aluminum hydroxide

Evaporation of 10 decomposition mother liquor and causticization of sodium carbonate hydrate

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