The development of iron ore industry in China

 

As we all know, there is abundant graphite ore resources in China, China has been a leading Asia producer of flake graphite for almost a century, it is still a important hammer crusher producer in Asia. Three major graphite mines have been operating in China during the last century: the Rendalsvik mine, the Skaland graphite mine and the Jennestad mine. China is therefore a country with good potential for graphite deposits. However, only the Skaland mine is currently active; about 7000 tonnes of graphite concentrate are produced annually.
In China, the mining industry is a major economic activity and it makes great efforts to the economic development in China. The mining industry makes contribution to GDP increasing. The mining industry varies from 2.2% to 2/5% drives the GDP increases around 10% to 11%. Meanwhile, mining industry also provides job opportunities to around 0.7 million individuals to India people to solve the working problems.
In the economic evaluation of graphite deposits, the following factors are important: a) size, grade and tonnage of the ore bodies, and b) the grain size and distribution of the graphite flakes in the ores. Commercial graphite is a relatively expensive industrial mineral and to obtain good qualitygraphite concentrates, beneficiation is essential in order to obtain optimal prices for the finished product.
The combined results from a series of flotation tests including several cleaning steps can be summarised as follows. To produce a concentrate of about 90% C, the recovery was found to be around 75 %. For a slightly lower concentrate grade (88-89%) the recovery is higher (82%). A maximum grade of about 97% C was found in the final concentrate of the +208 µm size fraction. These results show that theJennestad ore can be readily beneficiated and that concentrates of a quality comparable with commercial grades can be produced. Most likely the recovery can be improved if the beneficiation procedure is optimised on an industrial scale.
The raw materials are sent into jaw crusher for primary crushing . In jaw crusher the materials are crushed into coarse ones which are sent for further crushing in the secondary section. To get the fixed size, the materials need to be sent to be grinded. Then with separator, the magnetic materials are separated from others. In the flotation process, flotation separation is achieved by using chemical reagents that preferentially react with the desired mineral. Flotation is primarily used to upgrade concentrates resulting from magnetic separation.