| 20090162752 | Zinc Can of Environmental Protection Type for Battery and Manufacture Method Thereof - A zinc can of environmental protection type for battery and the manufacture method thereof, the zinc can is formed of a zinc base alloy including 0.001-0.04 wt % of aluminum, without containing non-occasional impurity such as cadmium, lead, iron and copper. A zinc base alloy liquid is formed by melting pure zinc to which aluminum is added; the zinc base alloy liquid is cast and cooled in continuous casting machine at a certain speed so as to obtain a continuous cast zinc band; the continuous cast zinc band is rolled on rolling mill so as to obtain a zinc coiled plate or zinc sheet with a predetermined thickness; the zinc coiled plate or zinc sheet is punched in hot state or cold state on a punch press such that a round or hexagonal zinc pellet is obtained; The zinc pellet is placed in a furnace with a constant temperature within a temperature range of 150-200° C. for 2-8 hours, and then is taken out for cooling naturally to the room temperature; The zinc pellet is stretched into a whole zinc can on a punch press. The zinc can does not contain any harmful substances such as lead, cadmium, mercury and so on, so that the battery exhausted poses no pollution to the environment and also maintains the manufacturing property, mechanical strength and corrosion resistance of the prior zinc can containing lead for battery. | 06-25-2009 |
