| Material flow analysis was the effective method to make research about industrial metabolization of a specific material or combined material in a national or regional range.The purpose of material flow analysis was to find the way of saving natural resources, improving environment, in order to promote the transform of industrial system toward sustainable development. Material flow analysis was an important basis of making industrial policy of material.There were many kinds of material flow analysis methods. Following-observing method which was put forward by academician Mr.Wu, on the basis of life cycle chart of material, was selected to study circulation state of zinc in China. The outstanding characteristic of the method was that the course of following material began from natural resources, the starting point of life cycle of material products, to scrapped products, the terminal point of life cycle of material products, finally to regenerated scrap products resources, the another starting point of second life cycle of material products.Metal zinc was important material base of national economy. Because of the fast development of economy, zinc resource crisis had already presented at home and abroad. In order to analyse the situation of zinc flow clearly, main consumption structure of zinc products in China had analysed, average life span of each kind of zinc products had calculated, namely zinc-plated products,21.2 years, brass products,30 years, zinc oxide products,5.3 years, the zinc battery,0.17 years, zinc alloy die casting,11.1 years, zinc material products, respectively. Thus the weighting average life span of zinc products was calculated out as 16-18years. Regeneration depreciation life span of zinc products is 20 years, because only brass scrapped products, zinc alloy die casting scrapped products, zinc material scrapped products were relcaimed and regenerated actually.In order to calculate the relevant data of regenerated zinc in China, calculating methods of resource amount and output of depreciated regenerated zinc and processed regenerated zinc, especially normal distribution probability method, by which resource amount of depreciated regenerated zinc can be calculated more accurately, had proposed. It was very complicated to investigate scraped probability distribution of each kind of metal products. It was found that, if consumption structures of each kind of metal products were relatively stable, and volume of metal consumption was linear change with time, exact value can be got by adopting average life span method to calculate resources amount of depreciated regenerated metal. Otherwise Much more approximate exact value can be got by, firstly adopting average life span method to calculate resources amount of depreciated regenerated metal of each product respectively, then summing up those resources amount.Forming and retrieving approaches of regenerated zinc during the stages of production, processing and manufacturing, using and retrieving were comparatively described, through a large amount of investigation and research. Resource amount of regenerated zinc were calculated out, increasing progressively from 1,221,000t to 1,700,300t, output of regenerated zinc, increasing progressively from 212,600t to 356,000t, comprehensive regenerated rate, increasing progressively from 17.4% to 20.9%, in China from 2000 to 2004. The main reason that the regenerated rate of zinc in China was low was that the usable depreciated regenerated zinc resource, such as scattered ore, tailing, zinc-plated products, etc, and the regenerated zinc resource of the zinc oxide products were not retrieved, was also analyzed.Zinc flow chart of China in 2004 had been drawn. Major indicators of zinc cycle of China from 2000 to 2004 had been analyzed. Rate of self-sufficiency of raw materials of zinc produce stage reduced from 101.1% to 88.6%. Rate of self-sufficiency of raw materials of processing and fabrication stage dropped from 140.4% to 93.6%. The ore index dropped from 1.333t/t to 1.275t/t. Regeneration index of zinc rose from 0.118t/t to 0.126t/t.Regenerattion index of metal was the index to describe sufficient degree of metal regenerated resources in metal industry, and regeneration index of depreciated metal was main index to induce the change and the magnitude of regenerated metal index. Important influence factor on regeneration index of depreciated metal, that is, four kinds of essential features of metal consumption function and four kinds of association of essential features, had, been analyzed. Relation between all kinds of metal consumption function and regeneration index of depreciated metal its recycled index of depreciation had been analyzed also. Both theory value and actual value of regeneration index of depreciated zinc of China increased gradually before 1990, then, reduced gradually. Theory value and actual value were 0.566 and 0.054 respectively in 1990, reduced to 0.235 and 0.029 respectively by 2003. Conclusion can be got that resources of regenerated zinc in China must be insufficient. If zinc industry developed according to the consumption trend at present in China, it was estimated that theory value of regeneration index of depreciated zinc would be the lowest, as 0.233 about in 2010, then would rise slowly, and actual value reached the minimum in 2002, namely resources of regenerated zinc in China would be scarce all the time.Through comparing with the disparity in such aspects as economy, industrial policy, management to promote zinc cycle between China and developed countries, defects in the policies of promoting zinc cycle in China were found out, by macroeconomics method, etc. Policy recommendations were proposed, including mainly:setting up the intact policy system of promoting zinc circulation, implementing the strategical reajustment of raw materials structure of zinc industry, accelerating the research, development and popularization of key technology, making the scientific rational economic policy, carrying out the legal and rule strictly, promoting industrial combination, were put forward,setting up licence system of industry entering and effective and uniform recovery system.
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