| With the rapidly development of applications and technology of desalination, as the byproducts, the production of brine had also raised. Thus, as the important issue and challenge, the processing and utilization of brine in desalination industry is currently faced. Currently, the application of brine is focused on the extraction of chemistry resources. In order to archive the chemical products, such as salt, KCl, Mg SO4, Br2, Mg Cl2, the mainly matter is combination the salt industry and the brine utilization. According to the technical of brine utilization and chemical engineering, magnetic nano-lithium ionic sieve method of extracting lithium and bubbling was used in the salt industry and the brine utilization. Meanwhile, the key technologies were explored.At first, in order to exploring the brine salt with bubbling, a 120 m2 bubbling pool and a 1 m2 contrast pool were built in the Liuheng Island. The key influence factors were analyzed by the dates of temperature, liquid level and Baume degree. Then, based on the results of exploring experiments, two sizes of bubbling pool were built in the lab. The bubbles’ movement behaviors in two scales were studied under the different conditions of bubbling outlet number, gas flow, outlet distance, arrangement and so on.As the results showed, the brine bubbling salt had perfect performance in special period. Furthermore, the bubbling coverage on the surface and the droplets from bubbles were the main factors in brine bubbling salt. So, the research also found that the small bubbles were more suitable for the process of brine bubbling salt which hold the higher coverage and splashing more droplets under the same gas flow. The coverage rose by the gas flow, liquid level, and outlet distance increased, but when the conditions match a special value, the coverage never raised. Thus, optimal operator parameters had been confirmed as following: gas flow at 0.4 L·min-1, liquid level at 8cm and the outlet distance at 12 cm.At second, the four steps method was used in preparing Li. And in order to preparing the precursor, a new style of reactor was made by us. In this reactor, two streams first collided to form nano-Fe3O4 suspension, which flew through an S-shaped main channel to generate reversing high-gravity fields. At the same time, 24 thin liquid sheets impinged into the suspension stream by high frequencies to create nano composite colloids. The products were characterized by TEM/EDS, XRD, BET and VSM. Experimental results indicated that well-defined core-shell structured nanoparticles with 61.1emu/g in magnetization intensity and 90.53m2/g in surface area were successfully synthesized. Low coating ratio prolonged the induction period of nucleation and realized heterogeneous nucleation. High main flux greatly intensified the meso and micro mixings.As the results showed, nano-Fe3O4 cores were uniformly covered by the shell of Mn OOH. The high-frequency impingements of 24 thin liquid sheets not only accelerated the initial dispersion, but also shortened the macro-mixing time to the magnitude of 0.1 second. As a continuously operated reactor, the high-frequency impinging streams(HFIS) reactor is promisingly used for the large-scaled and low-cost production of nano composite particles. |
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