Preparation device and method of magnesium hydroxide slurry
A technology of magnesium hydroxide and preparation device, applied in magnesium hydroxide, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficulty in preparing high-concentration slurry, low hydration rate, long hydration time, etc. , to achieve the effect of automatic control, small solid particle size and difficult precipitation
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Embodiment 1
[0026] Such as Figure 1-2 As shown, a preparation device for magnesium hydroxide slurry includes a mixing tank 1, a hydrator 2 and a storage tank 3 connected in sequence, the mixing tank 1 is used for containing and mixing raw materials, and the hydrator 2 is a material The main reaction place, the storage tank 3 is used to collect the prepared magnesium hydroxide slurry. The hydrator 2 includes a feed port 5, a driving device 6, a reducer 7, an agitator shaft 8, an air pressure control valve 9, a baffle 10, a controller 11 and a discharge port 12, and the feed port 5 of the hydrator 2 passes through The pipeline is connected with the mixing tank 1 , and the discharge port 12 is connected with the storage tank 3 . The driving device 6 is a motor, the output end of the motor is connected with the reducer 7, the output end of the reducer 7 is connected with the stirring shaft 8, and the stirring shaft 8 extends into the inside of the hydrator 2, and the hydration reaction is p...
Embodiment 2
[0037] Such as image 3 As shown, the difference from Example 1 is that a preparation device for magnesium hydroxide slurry includes two hydrators 2, and the two hydrators 2 are connected in series. Specifically, the mixed material passes through the first hydrator 2 and the second hydrator 2 sequentially along the conveying direction, and the two-stage hydration makes the hydration reaction more complete.
[0038] A kind of preparation method based on the high concentration magnesium hydroxide slurry of above-mentioned device, comprises the steps:
[0039] (1) Add 1000-mesh light-burned magnesia powder, tap water, seawater and monosaccharide dispersant into the mixing tank 1, and mix evenly to obtain a slurry. The mass ratio of tap water to seawater is 1:10, the mass fraction of light-burned magnesia in the slurry is 27%, and the mass fraction of monosaccharide dispersant in the slurry is 1%.
[0040] (2) The slurry obtained in step (1) is fed into the first hydrator 2 thro...
Embodiment 3
[0046] The difference with embodiment 2 is that a kind of preparation method of magnesium hydroxide slurry comprises the steps:
[0047] (1) Add 3000-mesh light-burned magnesia powder, tap water, salt lake brine and monosaccharide dispersant into the mixing tank 1, and mix evenly to obtain a slurry. The mass ratio of tap water to salt lake brine is 1:15, the mass fraction of light-burned magnesia in the slurry is 60%, and the mass fraction of monosaccharide dispersant in the slurry is 5%.
[0048] (2) The slurry obtained in step (1) is fed into the first hydrator 2 through a peristaltic pump and a feed port 5 . At the same time, turn on the rotating motor to drive the stirring shaft 8 and the stirring paddle 14 to rotate at a speed of 500 rpm, propel and stir the mixed slurry, and promote the hydration of the magnesium oxide powder to form the magnesium hydroxide slurry.
[0049] (3) When the volume of the slurry reaches 2 / 3-3 / 4 of the volume of the first hydrator 2, stop fee...
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