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CN107628636A 一种制备大粒径硫酸锌的工艺 无效 - 撤回

一种制备大粒径硫酸锌的工艺
摘要：
本发明涉及一种制备大粒径硫酸锌的工艺，包括以下步骤：(1)将浓缩的婆美度为54Be的硫酸锌样品溶液置于结晶器中，将溶液温度50℃开始缓慢降温到30～34℃时，有细小的晶体开始出现；(2)再将溶液快速升温到45-48℃，至晶体完全溶解，搅拌速率70转/min；(3)再将溶液缓慢降温到39.5℃～40℃时，加入3-4g晶种，将溶液快速降温到25-29℃，降温速率为1℃/min，再将溶液恒温6h～7h，搅拌转速调至100转/min、有大粒径的硫酸锌晶体出现。本发明可获得大颗粒的硫酸锌，缩短了结晶时间，提高了生产效率。
摘要（英）：

The invention relates to a process for preparation of large-particle-size zinc sulfate, wherein the process comprises the following steps: (1) placing a concentrated zinc sulfate sample solution withthe Baume degree of 54 Be into a crystallizer, and starting to slowly cool the solution temperature of 50 DEG C to 30-34 DEG C, wherein fine crystals begin to appear; (2) then rapidly heating the solution to 45-48 DEG C until the crystals are completely dissolved, wherein the stirring rate is 70 RPM; and (3) slowly cooling the solution to 39.5 DEG C-40 DEG C, adding 3-4 g of a crystal seed, rapidly cooling the solution to 25-29 DEG C with the cooling rate of 1 DEG C/min, then making the temperature of the solution constant for 6 h-7 h, adjusting the stirring rotating speed to 100 RPM, and allowing the large-particle-size zinc sulfate crystals to appear. The large-particle-size zinc sulfate can be obtained, the crystallization time is shortened and the production efficiency is improved.

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