METHOD FOR OPERATING FLASH VESSEL

摘要

The present invention is such that, with H1 being the height from a slurry outlet to a control liquid level, H2 being the height from the control liquid level to the top of a flash vessel, and being the diameter of the flash vessel, 0.35D≦H1≦0.45D, and 0.75D≦H2≦0.85D, and at least one liquid level sensor detects a slurry liquid surface at a control liquid level; when the liquid level sensor detects a slurry liquid surface which has risen, a slurry discharge valve installed on a slurry discharge pipe derived from the flash vessel is opened; and when the liquid level sensor detects a slurry liquid surface which has fallen, the slurry discharge valve is closed, whereby opening and closing of the valve is appropriately controlled thereby to reduce troubles with a steam discharge pipe, the slurry discharge pipe, and the slurry discharge valve.

主权项

1. A method for operating a flash vessel in a high-pressure acid leaching process, the high-pressure acid leaching process being such that a raw material slurry is leached by using an autoclave under high temperature and high pressure and then a temperature and pressure of a leached slurry is reduced to normal temperature and pressure by using the flash vessel,
wherein, with H1 being a height from a slurry outlet to a control liquid level, H2 being a height from the control liquid level to a top of the flash vessel, and D being a diameter of the flash vessel, 0.35D≦H1≦0.45D, 0.75D≦H2≦0.85D,and at least one liquid level sensor detects a slurry liquid surface at the control liquid level,
and wherein, when the liquid level sensor detects a slurry liquid surface which has risen, a slurry discharge valve installed on a slurry discharge pipe derived from the flash vessel is opened, meanwhile, when the liquid level sensor detects a slurry liquid surface which has fallen, the slurry discharge valve is closed.