Sulphur melting tank

In many European countries and in North America, sulphur can be delivered in liquid form and stored on site in heated storage tanks. Sulphur melting is required when sulphur is delivered in... 

In this case, the sulphur burner is less dependent upon the sulphur melting process. The day or shift-tank can be placed on load cells so that the metering pump for sulphur can be checked by the loss-in-weight principle. 

Pascal [2] describes it as follows. Phenol, which is supplied in iron drums, is melted by placing the drums, alter removing their lids and bottoms, into steam heated cylinders (I) (Fig. 111). Molten hot (80°C) phenol is collected in the heated tank (2) which also acts as a proportioner. Adjacent to it, is a tank (3) for 92% sulphuric acid. 

Wet scrubbers are in use in melting shops to clean the cupola off-gas. Wet serubbers use water to remove dust particles (average loading 10-15 g/Nm ) and gases sueh as sulphur dioxide from cupola off-gas. In the settling tank, a large part of the solid partieles are captured and thereby almost completely removed from the scrubbing water. 

The Frasch process. This process has been used for almost a hundred years to obtain sulphur from underground deposits. A hole is bored to the bottom of the sulphur-bearing layer using oil-drilling equipment. Three concentric tubes are then placed in the hole. Water at about 160 °C is passed down the outer tube to melt the sulphur which at this stage is heavy and cannot be forced above ground by the water. Therefore compressed air is forced down the central tube to aerate the sulphur sufficiently for it to pass up the third concentric tube to the surface. The molten sulphur is then passed into a separator to allow air to be removed. It is then solidified or stored in the liquid form in steam-heated tanks. 

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