A kind of preparation method and device of magnesium hydroxide
A technology of magnesium hydroxide and preparation device, applied in the direction of magnesium hydroxide and the like, can solve the problems of large consumption of caustic soda, large amount of washing water, and many impurities, and achieve the effect of improving quality and improving preparation efficiency.
Active Publication Date: 2020-09-15
QINGHAI SALT LAKE IND
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Problems solved by technology
[0002] In the prior art, the production of magnesium hydroxide is generally produced by the reaction of sodium hydroxide and magnesium chloride. The consumption of caustic soda in this method is large, the raw material cost of caustic soda is high, and unreacted materials such as caustic soda and magnesium chloride in the solution will Wrapped in magnesium hydroxide precipitation, resulting in a large amount of washing water, more impurities such as chloride ions, sodium ions, and magnesium ions in the product, the product quality is not easy to improve
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[0057] After magnesium chloride is injected into the synthesis kettle 1 through the magnesium chloride feeding pipe 4, liquid ammonia is injected into the synthesis kettle 1 through the liquid ammonia feeding pipe 2, and the magnesium chloride and the liquid ammonia react. During the reaction process, normal temperature water is passed into the cooling coil 6 to carry out normal temperature circulation to control the temperature of the synthesis kettle 1 . After the reaction is completed, the material in the synthesis kettle 1 is transported to the discharge tank 9 , and then enters the plate and frame filter press 11 via the feeding pump 10 . The plate and frame filter press forms magnesium hydroxide into a filter cake and leaves it in the plate and frame filter press, and transports the liquid containing ammonium chloride and unreacted ammonia to the ammonia distillation device for ammonia distillation treatment, so as to realize the recovery of ammonia Reuse to achieve cost...
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Abstract
The invention discloses a preparation device of magnesium hydroxide. The preparation device comprises a synthesis kettle (1), a liquid ammonia feed pipe (2), an ammonia feeding flow meter (3), a magnesium chloride feed pipe (4), a cooling coil (6), a discharge chute (9), a feed pump (10) and a plate-and-frame filter press (11), wherein the liquid ammonia feed pipe (2) and the magnesium chloride feed pipe (4) are connected with the synthesis kettle (1) respectively; the ammonia feeding flow meter (3) is arranged on the liquid ammonia feed pipe (2); the cooling coil (6) is arranged in the cavity of the synthesis kettle (1); the synthesis kettle (1) is connected with the discharge chute (9); the discharge chute (9), the feed pump (10) and the plate-and-frame filter press (11) are sequentially connected. The invention further provides a preparation method of magnesium hydroxide.
Description
technical field [0001] The invention relates to a compound preparation device and method, in particular to a magnesium hydroxide preparation method and device. Background technique [0002] In the prior art, the production of magnesium hydroxide is generally produced by the reaction of sodium hydroxide and magnesium chloride. The consumption of caustic soda in this method is large, the raw material cost of caustic soda is high, and unreacted materials such as caustic soda and magnesium chloride in the solution will Wrapped in magnesium hydroxide precipitation, resulting in a large amount of washing water, more impurities such as chloride ions, sodium ions, and magnesium ions in the product, the product quality is not easy to improve. If calcium oxide or milk of lime is used to produce magnesium hydroxide, the content of calcium and magnesium ions is still not easy to reduce, and the product quality is not easy to improve. [0003] Therefore, wish to provide a kind of prepar...
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IPC IPC(8): C01F5/20
CPCC01F5/20
Inventor 王石军李生廷侯元昇王树龙刘利武李生兴王金晶朱淼淼马福菊杜佩英
Owner QINGHAI SALT LAKE IND