In general, the small scale mining equipment includes crushing equipment, grinding machine, beneficiation machine and the auxiliary equipment. Crushing equipment can be divided into primary crushing machine, such as jaw crusher and the secondary crushing machine, such as cone crusher, impact crusher and VSI crusher. The grinding machine often has ball mill and vertical roller mill. Flotation machine, gravity separator and magnetic separator classifier belongs to the beneficiation equipment. Auxiliary equipment often includes vibrating feeder, vibrating screen and belt conveyor. These machines work with each other to complete the whole production line.
Small scale mining is a form of low technology mining widespread in developing countries. It is the main supplier of many different metals and minerals for the world market. For instance, the world demand for beryllium and fluorspar is by and large met by small scale mining, while the copper and phosphate market is completely dominated by large-scale, commercial mining. There are two main forms of small-scale mining extraction from primary and extraction from secondary deposits. Extraction from primary deposits means that the ore is taken directly from the rock. Extraction from secondary deposits means that the ore is found in sand and gravel in rivers and torrents.
Generally speaking, it is acknowledged that small scale mining can contributed for the financial growth of an area. The sector employs thousands of those who have had short or no training. The profit made on the mining is generally employed and invested locally, which indicates that is has a constructive effect on the nearby community. Moreover, job opportunities inside the small-scale mining industry lower the migration from land to city, a phenomenon which is very common in developing countries. But simultaneously, the industry creates social, political and environmental problems which avoid it from achieving its complete prospective.
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