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Alumina production (2)

3. Chinese aluminum oxide plant in Table 3.

Table 3    China alumina plant list

Serial number

Factory name

Design capacity / (10,000 tons / year)

production method

Serial number

Factory name

Design capacity / (10,000 tons / year)

production method

1

Shandong Aluminum Factory

50

Sintering method

4

Shanxi Aluminum Factory

120

Joint law

2

Zhengzhou Aluminum Factory

80

Joint law

5

Henan Zhongzhou Aluminum Factory

20

Sintering method

3

Guizhou Aluminum Factory

40

Joint law

6

Guangxi Pingguo Aluminum Factory

30

Bayer method

4. Characteristics of alumina production (1) Diversified production methods and long process flow Due to the different raw materials processed, different production methods are required. The production methods used in the industry are: Bayer process - treatment of bauxite with low silica content; sintering method - processing of raw materials with high silica content; combined method - Bayer process combined with sintering method, at the same time Used in the factory. At present, more than 90% of the world's alumina is produced by the Bayer process, and only China and Russia, Ukraine, and Kazakhstan use the sintering method.
The alumina production process is a closed loop process of heat and alkali. The first half of the plant is the raw material processing system, and the second half of the plant is the purification process, which is the closed cycle of the solution. The Bayer process plant is generally divided into five main production workshops and 35 major processes; the sintering process plant is generally divided into five main production workshops and 22 major production processes; the joint process plant is generally divided into six main production workshops and 42 major production processes. .
(2) The production technology requirements are high, and there must be sufficient material foundation conditions. Due to different production methods, the process flow of each process is also different. The whole process flow is a closed loop system of materials and heat, so high production is required. Operational technology and management technology.
There must be a sufficient supply of stable and stable aluminum ore. Each production of It alumina consumes 10-15 tons of new water, 350-500 degrees of electricity, and coal It. Therefore, the production of alumina requires a sufficient water source, a stable power supply and high quality coal.
(3) Raw material resources for alumina production There are hundreds of minerals containing aluminum in nature. The main aluminum minerals are shown in Table 4.

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