There are currently 44 aluminum producing countries in the world. In 1998, the world's primary aluminum production was nearly 22.5 million tons. These aluminums were produced by electrolysis. Since the birth of the electrolysis method, the basic theory has changed little, but the structure of the electrolysis cell has been greatly improved and developed. There are currently four kinds of electrolyzers in the world: the side-inserted anode rod continuous self-baking anode electrolyzer (ie, side-insertion) The tank is inserted into the anode rod continuous self-baking anode electrolyzer (ie, the upper tank), the continuous prebaked anode electrolysis tank, and the prebaked anode electrolysis tank (ie, the prebaked tank). Pre-baked cells have developed the fastest in the past forty years. In order to further increase aluminum production and reduce energy consumption, various industrial countries have devoted themselves to the large-scale operation and operation automation of electrolytic cells and the experimental research on process equipment. Many countries have built and put into operation more than 200,000 amps of large-scale modern intermediate feed pre-baked tanks. The series, the mechanization of electrolysis, the degree of automation and labor productivity are increasing. With the development of science, management technology is constantly improving, production technology and economic indicators are constantly refreshing, and environmental protection is receiving more and more attention. Some countries have solved it very well or have basically solved it. In general, the trend in the development of aluminum production in the world is the continuous enlargement and modernization of aluminum electrolysis cells. The aluminum production technology is constantly improving, the output of aluminum is continuously increasing, and the environmental impact is continuously improving.
Aluminum metal produced after the electrolytic method, generally the molten aluminum is cast into ingots, i.e. ingots goods, supplied to a user after remelting for further processing in various ways, and made of various aluminum products.
The quality standards for remelted aluminum ingots are as follows.
(1) The chemical composition of the aluminum ingot for remelting is specified in the table.
 Chemical composition of aluminum ingot for remelting | ||||||||
Brand | Chemical composition /% | |||||||
Al (≥) | Impurity (≤) | |||||||
Fe | Si | Cu | Ca | Mg | Other varieties | sum | ||
Al99.85 | 99.85 | 0.12 | 0.08 | 0.005 | 0.03 | 0.03 | 0.015 | 0.15 |
Al99.80 | 99.8 | 0.15 | 0.1 | 0.01 | 0.03 | 0.03 | 0.02 | 0.2 |
Al99.70 | 99.7 | 0.2 | 0.13 | 0.01 | 0.03 | 0.03 | 0.03 | 0.03 |
Al99.60 | 99.6 | 0.25 | 0.18 | 0.01 | 0.03 | 0.03 | 0.03 | 0.4 |
Al99.50 | 99.5 | 0.3 | 0.25 | 0.02 | 0.03 | 0.03 | 0.03 | 0.5 |
Al99.00 | 99 | 0.5 | 0.45 | 0.02 | 0.05 | 0.05 | 0.05 | 1 |
(2) Appearance of aluminum ingots The aluminum ingots should be silvery white. The surface of the aluminum ingot should be neat and tidy, without serious flash and air holes, allowing slight slag inclusion.
(3) Aluminium ingot quality and ingot type The quality of each aluminum ingot is (20 ± 2) kg or (15 ± 2) kg [but according to international practice (15 ± 2) kg ingots are generally not produced now]. The aluminum ingot type should meet the relevant shape and size requirements for storage, packaging and transportation.
This product is widely used in the particleboard plant, medium and high density fibreboard plant, stubble plants, biomass power plant, wood chip plant, etc.
Wood Pellet Machine,Wood Pellet Making Machine,Wood Pellet Maker,Wood Pellet Press
Jinan Shanghangda Machinery Co., Ltd. , https://www.jinanshdmachine.com