Laser cleaning is the process of using laser to removing contaminants, such as rust, oil, oxides, etc., on steel and other surfaces . Laser cleaning is achieved through laser ablation. It allows the selective removal of the contaminants with little impact on the substrate. Why we need a Laser Cleaning Machine ?
Compared with old method such as dry-ice blasting, media blasting or cleaning using chemical solvents, we can remove many unwanted side effects by using laser cleaner. For example. if you use chemical solvents, it will produce a high amount of waste during process. if you use dry-ice blasting, the process will be very noisy and not efficient. Laser cleaning is a non-contact and non-abrasive process. It using laser light to blasts off the material from the surface layer. The process can be repeat , finishing surface is very clear. laser cleaning has same even better result compared with traditional method but the way in which the actual operation is completed is what makes laser cleaning different. Safer and more environmentally friendly
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By the end of 2005, China’s electrolytic aluminum production had been ranked first in the world for four consecutive years, alumina production was ranked second in the world for four consecutive years, and aluminum production was the second highest in the world for three consecutive years. The literature army stated that China’s aluminum industry is really big, but it is not strong. At present, China’s aluminum industry is at an important turning point.
First of all, the growth rate of electrolytic aluminum production fell, and the investment amount decreased year-on-year. In September, the output of electrolytic aluminum was 6.71 million tons, a year-on-year increase of 16.8%, and the growth rate was 1.7% lower than the same period of last year; the investment in aluminum smelting completed was 19.7 billion yuan, an increase of 1.1 billion yuan or 5.9% year-on-year. Second, alumina production increased rapidly, spot prices fell rapidly, and foreign dependence declined. In the first nine months of this year, the production of alumina was 9.437 million tons, a year-on-year increase of 57%; the import of aluminum oxide was 5.26 million tons, a year-on-year decrease of 1.5%, and the degree of foreign dependence fell from 45% to 36%. In addition, the export volume of electrolytic aluminum has also been significantly reduced, and exports of aluminum alloys and aluminum have grown rapidly. In the first nine months of this year, electrolytic aluminum exports reached 674,000 tons, a year-on-year decrease of 26.3%, while aluminum and aluminum exports were 289,000 tons and 867,000 tons, respectively, up 168.1% and 67.1% year-on-year respectively.
The literature army pointed out that the prediction of alumina production by 14 million tons in 2010 is obviously too low. In the coming years, alumina will develop in coordination with electrolytic aluminum. Even if there is a substantial increase in alumina production, it will not be able to export. If aluminum oxide exports occur, the association will recommend that relevant agencies use tariff measures at any time.
China's Nonferrous Metals Industry Association's Aluminium branch secretary-general said recently that alumina production will remain slightly below the level of demand, and it is impossible for China's alumina to be exported.