Reciprocating pumps for alumina transportation include piston pumps, metering pumps and diaphragm pumps, commonly known as reciprocating pumps. It is a kind of positive displacement pump, which is widely used. Reciprocating pump is a conveying machine that directly provides energy to liquid in the form of pressure energy through the reciprocating motion of piston. According to the driving mode, reciprocating pumps are divided into motor-driven pumps (motor-driven) and direct acting pumps (steam, gas or liquid driven).

Chinese name reciprocating pump foreign name reciprocating pump material classification of cast iron piston pump, plunger pump and diaphragm pump

The main characteristics of reciprocating pump for alumina transportation are: ① high efficiency and wide efficiency area. ② Can achieve very high

High pressure, pressure change hardly affects the flow, so it can provide constant flow. ③ With self-priming capacity, it can transport liquid and gas mixtures, and specially designed can also transport mud, concrete, etc. ④ The flow and pressure have large pulsation, especially in single acting pump. Due to the acceleration of piston movement and the discontinuity of liquid discharge, the pulsation is greater. It usually needs to be on the discharge line (sometimes on the suction pipeline) an air chamber is set to make the flow more uniform. The use of double acting pump and multi cylinder pump can also significantly improve the non-uniformity of flow. ⑤ the speed is low, the size is large, the structure is more complex than centrifugal pump, special pump valve is required, and the manufacturing cost and installation cost are high. Piston pump is mainly used for water supply, and manual piston pump is a widely used family life Water pump. Plunger pump is used to provide high-pressure liquid source, such as high-pressure water supply of hydraulic press. It and piston pump can be used as drilling mud pump and oil well pump in oil field. The diaphragm pump is especially suitable for conveying highly toxic, radioactive and corrosive liquids, precious liquids and liquids containing abrasive solids. Diaphragm pump and plunger pump can also be used as metering pumps.

氧化铝输送用往复泵包括活塞泵、计量泵和隔膜泵，通称往复泵，它是正位移泵的一种，应用比较广泛。