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Chapter
Simulation of Anode Bubble: Volume of Fluid Method
In an aluminum reduction cell, bubbles are generated on the anode surfaces. Before they get out of the bath, they linger over between gap of the anode and the cathode, which leads to additional voltage drop. T...
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Chapter
Current Efficiency Predictive Model and Its Calibration and Validation
Current efficiency is one of the most important technical and economic parameters. Current efficiency loss is due to dissolved aluminum reacting with the anode bubbles by the back reaction, which is assumed to...
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Chapter
Research on Digestion Behavior of Sulfur in High-Sulfur Bauxite
In this paper, a study was made on digestion behavior of sulfur in high-sulfur bauxite. It was investigated that the effects of temperature, time, lime dosage and initial caustic concentration on digestion beh...
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Chapter
PFC Survey in Some Smelters of China
PFC survey was performed by Zhengzhou Research Institute of CHALCO (ZRI). Results of the first PFC survey from several different Chinese smelters are discussed in this paper. This survey included normally-oper...
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Chapter
On Continuous PFC Emission Unrelated to Anode Effects
An investigation was made into operating parameters that could result in continuous PFC emission unrelated to anode effects in two smelters. Anode current distribution was measured in QY smelter. No obvious co...
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Chapter
Development Status of Processing Technology for Spent Potlining in China
With the development of Chinese aluminum industry, wastes from smelters are severely restricted by the government. Different processing technologies for spent potlining (short as SPL) have been developed in th...
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Chapter
Simulation and Optimization of Cathode Current Distribution to Reduce the Horizontal Current in the Aluminum Liquid
In an aluminum electrolysis cell, the movement of molten aluminum is driven by electromagnetic forces resulting from the current fields in the cell. A rapid movement of the aluminum liquid results in a noisy o...
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Chapter
Conductivity of KF-NaF-AlF3 System Low-temperature Electrolyte
The continuously varying cell constant (CVCC) technique was applied to measure the conductivity of molten KF-NaF-AlF3 electrolyte with ([NaF]+[KF])/[AlF3] ratio (CRT) between 1.2 to 1.5. The investigated temperat...
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Chapter
A Techno-Economic Optimization Model for Aluminium Electrolysis Production
The major factors affecting the profit of an enterprise are the price of the product, the price of raw materials and energy consumed, depreciation of fixed assets, labor cost, output and process consumptions, ...
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Chapter
On Continuous PFC Emission Unrelated to Anode Effects
An investigation was made into operating parameters that could result in continuous PFC emission unrelated to anode effects in two smelters. Anode current distribution was measured in QY smelter. No obvious co...
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Chapter
Effect of Crystal Growth Modifier on the Structure of Sodium Aluminate Liquors Analyzed by Raman Spectroscopy
It has been proved that crystal growth modifier (CGM) can improve particle size distribution (PSD) and the alumina production. However, few researches were reported on whether CGM has an effect on the structur...
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Chapter
Theory and Experiment on Cooling Strategy during Seeded Precipitation
The η-t curve is derived from the dynamic equation of seeded precipitation. The curve has the characteristic of a hyperbolic function and the experimental results conform to the characteristics of the curve. T...
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Article
Conversion of Sulfur by Wet Oxidation in the Bayer Process
In this paper, the effects of temperature, oxidation time, and oxygen concentration on the conversion of sulfur by wet oxidation in the Bayer process were investigated at length. The results show that active s...
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Article
Alumina Solubility in KF-NaF-AlF3-Based Low-Temperature Electrolyte
KF-NaF-AlF3-based electrolyte is a promising low-temperature electrolyte for aluminum reduction. Alumina solubility in molten KF-NaF-AlF3-based electrolyte was determined as a function of the melt composition and...
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Article
Thermodynamics calculation of reactions between phosphorus and main elements in Al-Si-Cu alloys
The Gibbs free energy was calculated between phosphorus and the main elements in Al-Si-Cu alloys sampled as A390 to study the reaction process and give theoretical directions for the adding of phosphorus in in...
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Article
Cathodic behavior of graphite in KF-AlF3-based melts with various cryolite ratios
The cathodic behavior of graphite in KF-AlF3-based melt with various cryolite ratios (CR; molar ratio of KF to AlF3) were investigated by means of cyclic voltammetry, sampled-current voltammetry, and chronopotent...
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Article
Effects of caustic sodium concentration and molecular ratio of Na2O to Al2O3 on agglomeration in the precipitation process
The supersaturation of sodium aluminate solution (liquor) is a prerequisite for agglomeration and the key factors that determine supersaturation of liquor are caustic sodium concentration (Nk) and molecular ratio...
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Article
NiFe2O4-based cermet inert anodes for aluminum electrolysis
Recent developments in the preparation, sintering process, mechanical properties, and thermal shock resistance of cermet inert anodes for aluminum electrolysis are reviewed in this paper. To obtain the desired...
