Passed the ISO9001 quality system certification and the establishment of industrial drying industry alliance standards under the guidance of the Chinese Standardization Research Institute.
- May 08, 2019 -
microwave field can be solved by microwave technology and equipment. The drying time can be shortened and drying rate and productivity can be improved at a low temperature. Tang Jianwei of Sichuan University has done the experiment of acid hydrolysis of phosphate rock under microwave to produce common calcium. The research shows that microwave can improve the temperature of phosphate rock pulp, change the crystalline form, promote the reaction and improve the conversion rate.
For the further study of microwave drying process of chemical fertilizer, the effect of microwave on the granulation performance of high nitrogen compound fertilizer was found out through experiments, and the optimum technological conditions and the mechanism of mass and heat transfer of microwave drying compound fertilizer were determined. Preliminary experiments show that the temperature of fertilizer increases very slowly under the action of microwave, heating in microwave oven for 40 minutes does not exceed 50 C, while under the same conditions, the temperature of water heating in microwave oven for 5 minutes can reach 80 C, and the quality can be reduced by 70%. This is because the dielectric constant of general fertilizers is much smaller than that of water, such as urea 3.5, potassium chloride 5.03 and ammonium chloride 7.0. The different effects of microwave on fertilizer and water are the theoretical basis of microwave drying compound fertilizer. It can be predicted that the new drying technology and equipment of microwave drying equipment will make the drying process of fertilizer production a new look.
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