It is known that some suppliers of motive coal, coking coal inAustraliahas stopped to make offers to Chinese importers under the circumstance of short supply of coal. It is analyzed in industry career that the next three quarter’s import inChinawill survive after the earthquake inJapanbecause of the quickened expansion of imported energy, especially the coal…

Tension device is one of the main part of the belt conveyor, mainly for the normal operation of belt conveyer belt provide a certain amount of tension force, ensure the conveyer belt tension minimum tension point, the permanent elongation compensation conveyor belt. Therefore, choosing the appropriate tension device is the key to the design of…