Waste oil treatment of vacuum system

Magnesium smelting by silicothermic method is a process of MgO CaO being reduced by Si under high temperature and high vacuum. In vacuum engineering, H-spool pump is used as the front pump of the main pump, and oil pump is used as the spool pump, usually KK-1_ vacuum pump oil. In the reduction process, dust, water or steam from pellets will enter the pump chamber, emulsifying the vacuum pump oil. The emulsified pump oil will destroy the seal of the pump and make the vacuum degree of the system less than the rated vacuum degree. That is to say, the effect of H-spool pump depends on the quality of the vacuum pump oil.

In the process of pumping, it mainly depends on the high viscosity of vacuum pump oil, which is not easy to compress. It plays the role of sealing, lubrication and cooling in the pump. However, when dust, water (or steam) in pellets are absorbed into the vacuum pump chamber, the vacuum pump oil is rapidly emulsified, dirty and deteriorated, which makes the vacuum pump unable to exert its effect. The vacuum degree of the system immediately decreases, which affects the rate of reduction reaction and the quality and output of magnesium. In order not to affect the quality and output of crude magnesium during reduction, oil must be replaced and the polluted waste oil (press) The actual consumption of magnesium vacuum pump oil is 50kg). If it is not treated and reused, the production cost of magnesium will be affected.

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