Why do we need Mining so Much?
The importance of mining is definitely significant to China. Mining is an important industry, and Chinese are very advanced in their mining technology, but during the mining process, there is certain level of pollution produced. The Chinese government and the mining companies have very good plans and controls toward this problem, while ensuring the smooth running of the industries, and also helping to create strong economy and employment. The world of today could not exist without mineral products with ore beneficiation equipment. China produces about 60 minerals and ranks first among producing countries. As well, China is the largest exporter of minerals, with more than 20 per cent of production shipped to world markets.
If recycling is fundamentally more sustainable and cheaper than mining, than why do we still need to mine? If market capitalism works well the recycling industry would have totally replaced the mining industry by now, wouldn’t it? Unfortunately the answer to that question is negative. Apart from the fact that the lack of capability of most societies to deal with the negative externalities of waste could be seen as classic market failure which makes that only a small part of the metal available for recycling makes it to the furnace again, the fact that demand is growing forces us to add to the stock of metals in the world by mining. As long as the ‘global demand’ for metals grows, we need mining. In a world without growth and with perfect recycling the resources cycle would be closed: no new metal is needed, and no metal is disposed of: the environmentalist’s dream. But growth means that recycling alone is not enough to satisfy demand. Growth, either caused by population growth or by consumption growth, implies that we need more of the metals than what we used before. This gap is filled by mining.raymond mill:http://www.crusher-machine.com/13.html
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Another reason we still need mining is that recycling is not perfect. Even if we would manage to collect all the metal that is out there to recycle it, the process to recover the metal is imperfect. Especially for complex materials like alloys and glued products it is simply impossible to perfectly separate and recover all basic ingredients with dryer machine. The term used for the deterioration of metal quality over time is ‘dissipation’. To illustrate this concept: Recycled steel is used mainly to create bars; the purity of recycled steel is typically too low to be able to create good sheet products. In summary, we lose a lot of the above the ground stock by never collecting it for recycling, and we lose some of it because our metallurgical and chemical recycling processes are imperfect.
The United Nation Environmental Program’s International Resource Panel is working on an extensive study to get a grasp of the key numbers in this equation, analyzing current recycling rates, available stocks of metal, and resource intensity. Most of these parameters are amazingly unknown. We do know how much old scrap is used as input in production processes, but the estimates about how much metal is available in the world, either in use or in landfills, vary wildly. The organization uses a number of key terms to describe the fundamentals of recycling.
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