1, Vertical suction sand pump operation must be injected into the over-flow chamber of high-pressure water to protect the mechanical seal components shaft. Main pump in normal operation can not turn off the high-pressure water gun. Water pressure should be greater than the vertical suction sand pump working pressure. The overcurrent chamber assembly will wear out quickly even without high pressure water protection and may even cause serious damage to the impeller. 2, vertical suction sand pump fixed at the construction site, you should first see the original motive of the spindle and the spindle is on the same axis, such as sand suction shaft should not be adjusted for immediate precision. 3, sand suction pump inlet and outlet pipe should be bearing support to avoid the pipeline gravity to pump the body to cause damage to the pump. Pipeline installation should suction sand pump inlet and outlet flanges extended outward, and immediately do a good job at all points of support. 4 suction suction pump suction table in the suction table refers to the anti-cavitation pump suction pump characteristics under normal temperature water conditions. When pumping sediment should be as much as possible suction pump suction pump pressure is positive. The pump head flow will also be affected if larger solids are contained in the sediment. 5, the replacement of impeller and other wearing parts should be adjusted before and after the impeller and the gap between the liner, impeller and the liner axial gap size of suction pump performance and service life have a greater impact. 6, sand suction pump boot, please check the inlet pipe, the outlet pipe is blocked, forward and backward bearings are filled with butter, check whether the packing is full. 7, sand suction pump in the construction of the pump abnormal vibration, noise and bearing temperature is too high, should immediately stop checking each component to see if there is failure. 8, after each construction operation must be timely and quantitatively filled all parts of the bearing grease so that it is not easy to quickly rust.
The production process of copper in China is dominated by copper concentrates and pyrotechnic smelting of blister copper. The status quo is that the processing capacity is greater than the smelting capacity, smelting capacity has greatly exceeded the support capacity of copper concentrate, copper concentrate resources and scrap copper imports are required. Statistics show that in the 21st century, the output of domestic copper concentrate has not been significantly increased, maintaining an annual output of 600,000 tons (copper content, the same below), by the end of 2007 will form nearly 3.7 million tons of smelting capacity, far exceeding By then China's copper concentrate resources and the protection of the capacity of the international market may provide the amount of copper concentrate. The production capacity of copper mines in China can only meet 40% of the smelting capacity.
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