1. Physical and chemical characteristics of the material - form, moisture content, water content, crystal water, particle size, bulk density, viscosity, heat-sensitive, softening point, phase transition point, thixotropy, toxicity, corrosion, odor, flammability, explosiveness , electrostatic, gas permeability, agglomeration, crystal or particle smashability.
2. Drying characteristics of the material - The drying curve, the critical moisture content, and the equilibrium moisture content under the drying conditions to be selected.
3. Drying production requirements and long-term planning.
4. The impact of material commodity value and drying effect on it. Such as product moisture, pollution, temperature, wear, powder, crushing, rehydration and other effects on the value of goods.
5. The requirements for the material recovery rate.
6. The sequence of the material drying process.
7. Past drying methods for materials or similar products.
8. Available heat sources (coal, fuel oil, electricity, gas, liquefied gas, natural gas).
9. Installation site size, with or without special requirements.
10. Environmental Requirements - Restrictions on dust emission, noise, vibration, odor, volatiles, etc.
11. The amount of procurement funds that may be invested, local labor, land, and energy prices.
12. The user's operator level and maintenance capabilities.
Precision alloy, is a kind of alloy owning special physical properties (such as magnetism, electrical, thermal and other properties).The vast majority of precision alloy is black metal based, only a few is based of nonferrous metals. It usually includes magnetic alloys, elastic alloys, expansion alloys, thermal bimetal, electrical alloy, hydrogen storage alloys, shape memory alloy, magnetostrictive alloy and etc.
In addition, in practical application some new type alloy are also considered to belonging into precision alloy, such as vibration damping alloy, stealth alloy, magnetic recording, superconducting alloys and microcrystalline amorphous alloy and etc.
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