The development of aluminum industry

Chinese brown fused alumina price industry since the 1950s started, has been 50 years of history . Subsonic air atomized aluminum powder atomization method are used , the pressure water atomizing method is started into the production sequence , both products of irregular shape , also being spherical. In terms of ball milling of aluminum and aluminum manufacturing pulp , dry process and wet process have manufacturers use . Products are leafing aluminum powder and aluminum paste , aluminum and non- leafing aluminum paste . Suitable for water-based paint water dispersible aluminum paste already available in the form of aluminum alloys such as zinc and aluminum pulp slurry also produced .
4 features
Aluminum silver metal relative mass of 26.98 , a relative density of 2.55 , melting point of aluminum of 99.5% purity was 685 degrees , the boiling point of 2065 degrees, melting endotherm 323kj / g, aluminum reductive easily oxidized in the oxidation process exothermic . When a sharp exothermic oxidation 15.5 kj per gram / ​​g, aluminum is malleable metal , easy processing. Aluminum oxide film on the surface of the transparent and has good chemical stability.
Pigment particles with white fused alumina powder means scaly , and the desirability of treating agent coated aluminum powder pigments do . Aluminum paste is a mixture of aluminum powder pigment and a solvent , and it uses substantially the same characteristics and aluminum , because it is simple to use , and the greater the amount of production . Compared with aluminum pigment and other pigments , but also has its characteristic performance in the following aspects :
A scaly hide characteristics
Scaly aluminum particles , the ratio of diameter to sheet thickness of about ( 40:1 ) - ( 100:1 ) , the aluminum powder dispersed in the carrier in parallel with the substrate having the characteristics of many of the aluminum interconnection , the size filling the particles together to form a continuous metal film covering the substrate , and an outer coating of the light reflected , which is unique to aluminum hiding . Aluminum hiding depends on the surface area of the large and small , which is thicker than the diameter . Aluminum was extended during the grinding process , increasing diameter to thickness ratio , hiding also will increase .
2 , aluminum shielding properties
Aluminum powder dispersed in the carrier floating movement occurs , the result is always that its movement is parallel to its metal carrier coating to form a continuous layer of aluminum , and this aluminum layer is arranged parallel to the carrier film multilayer . Pores are staggered between the layers of aluminum powder , the capillary cut microporous support membrane , the outside water can not reach the gas through the pores of the substrate , which is characterized by good physical aluminum shielding .