SZG double cone vacuum dryer is a new type drying equipment which combines similar product technologies at both home and abroad. This rotary vacuum dryer possesses belt and chain two-stage elastic connection modes. With low center of gravity, this drying machine can operate smoothly. Heating medium and vacuum system adopt reliable mechanical seal or rotating joint, so as to avoid defects such as the regular packing seal is easy to leak. On this basis, we modify this double cone vacuum dryer. It not only embodies the humanized design concept but also meets the GMP standards.

Iron phosphate, also known as high-phosphoric acid iron, iron orthophosphate, has a molecular formula of FePO4, which is a white, off-white monoclinic crystal powder. It is a salt of iron salt solution and sodium phosphate, and the iron is positive trivalent. Its main purpose is to manufacture lithium iron phosphate battery materials, catalysts and ceramics. At present, there are two main methods for producing iron phosphate: one is the direct reaction of ferric salt with phosphoric acid or phosphate, and the other is the oxidation of ferrous iron or iron element by oxidant (such as hydrogen peroxide, sodium hypochlorite, etc.) and then phosphoric acid. Or phosphate reaction, and finally through purification, drying, roasting and other processes to obtain iron phosphate. For example, ferrous sulfate is used as the iron source, phosphoric acid is the phosphorus source, ethanol is used as the precipitation aid and dispersant, an appropriate amount of surfactant is added, the reaction is carried out under appropriate experimental conditions, and a certain concentration of the pH of the ammonia solution is used. Preparation of iron phosphate hydrate is obtained, and further calcination is carried out to obtain anhydrous iron phosphate.

1. This rotary vacuum dryer has advanced design, simple internal structure, convenient to clean and easy to handle.
2. The tubes of heating medium and vacuum system are built in the rack in order to prevent artificial damage and difficult clean.
3. The outer wall and rack sealing plate adopt polishing treatment, and the inner container adopts mirror polishing treatment.
4. The materials in the double cone vacuum dryer can be rotated due to the revolution of the machine, which can minimize material water content (≤0.5%).
5. The materials will not stick to the wall of the container. With big drying rate and energy saving, this rotary vacuum dryer can uniformly and sufficiently dry the materials.
6. Condenser and recycling tank are equipped for recovering organic solvent.
7. Our double cone vacuum dryer has three types of heat source, including steam, hot water and conduction oil.

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