Material is QT450

If it is difficult to distinguish the components of cylinder accessories the waste materials, the silicasol casting factory should take samples outside the furnace for analysis, carry out thermal insulation for temperature control. According to the analysis results report, carry out the regulation of the original ingredient.

When the temperature is controlled to 1580-1620 ℃, carry out refining, remove the old slag, add calcium silicate make new slag. In addition, the closing shall be terminated, the molten iron shall be put for 1-2min, then the temperature shall be raised by closing.

When the temperature is controlled to the pouring temperature required by the commodity (1620 ℃), add pure aluminum to carry out the final deamination. The slag shall be discharged, the furnace door shall be removed, the pouring shall be prepared in advance.

For example, when the flow of molten steel is large, there are many commercial shell formworks, the pouring time is long, pure aluminum shall be used to carry out reamination when pouring half of the time.

Practical operation regulations for pouring

The shell formwork shall be poured to ensure good high temperature firing.

The pouring temperature of shell formwork shall be controlled within the range of 1100-1300 ℃

During pouring, make the molten iron point to the rubber inlet cup center of the shell formwork as much as possible, so as to cause whirlpool prevent the molten iron rolling into the steam body.

During pouring, the pouring working pressure shall be selected according to the commodity appearance wall thickness. For the commodities that cannot be poured enough on the thick wall, the total flow, water flow pouring working pressure shall be increased with the decrease of formwork shell after pouring the molten iron.

Pouring rate: when the furnace is used for immediate pouring, the furnace worker shall be sure of the pouring rate. The first is that the furnace should be deep in the tap hole groove; the second is that the random pouring rate should be fast (naturally, it also depends on the pouring staff to point the shell mold, the furnace can tilt back quickly, the pouring should ensure the standard of accurate drainage method - stable injection flow - slow collection flow).

Heat insulation after pouring of molten iron. In order to make the molten iron coagulate in order have excellent feeding effect, after pouring the molten iron, stop for a while sprinkle the heat insulation (covering) agent on its rubber inlet. When pouring the aluminum alloy that is easy to be oxidized by air for refrigeration, the oxidizing atmosphere shall be created. After pouring, quickly sprinkle a little wax slag wood slag on the rubber inlet, cover the cover for refrigeration.