Method of adding low-melting-point raw materials

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The product manufactured by my company is in granular form. The raw material used has a melting point of around 50 degrees, and the production process involves adding this material after it has been melted; however, the reaction temperature needs to be maintained at around 7 degrees, which makes the process complicated. As a result, the resulting granules are not very small, and they contain some unreacted raw material, which affects the quality of the product. I am now looking to improve the method of adding the material, by using submersion feeding, since the raw material solidifies easily and is difficult to control. I would like to ask whether this approach is feasible Is there such specialized equipment? Experienced experts, please share some suggestions (without using the solvent method). As a supplementary note, another material used is highly corrosive (as a solvent), so the requirements for the dosing equipment are very high. (Acid and corrosion resistance) This post was last edited by Ant King on 2009-3-3 09:37.]