Granulation pilot plant

Fig. 17. Pilot-plant ammoniator—granulator, (a) Side view, showiag placement of acid and ammonia spargers, and (b) feed end view (71,72).

In a pilot plant [2,13], superalloy scrap containing Mo, W, Cr, Fe, Co, and Ni is pretreated in a furnace with carbon to transfer refractory metals (Mo, W, etc.) into carbides. The melt is granulated and the resulting material is charged into titanium baskets. Diaphragm-type electrolytic cells are used for anodic dissolution of the granulated material. Fe, Co, Ni, and small amounts of Cr are dissolved into a calcium chloride solution by the current. The metal carbides are not dissolved and remain as an anodic residue in the baskets. 

Fluidized bed granulation monitoring of a fertilizer product (urea) in a semi-industrial pilot plant (SIPP), illustrating the main features and benefits. 

A model for crystallization point of the urea melt sprayed into the granulator was developed based on acoustic spectra recorded from sensor position A during a trial period of 24 hours. A flow sheet of the liquid urea feed process can be seen in Figure 9.7. Sensor A is mounted onto an orifice plate inserted in the main supply pipeline of liquid urea (see Figures 9.6 and 9.7). The reference values used to calibrate the model are the crystallization temperature (called the jc point ), as determined by the pilot plant laboratory (heat table visual nucleation/crystallization detection). 

Now that we have decided what types of batches will be manufactured in the pilot plant, we need to map out the process. In a solid dosage form facility there are a few process flows that can be followed. Some processes that can be used are dry blending, wet granulation, and dry granulation (see Fig. 1). Either compaction into... 

The fluidized dram granulation process had not been used before to produce granular AN. However, it had been used to fatten urea prills. Extensive pilot plant trials were carried out to define the parameters for granulating AN. The... 

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