Digestion-carbonization device and calcium carbonate nano-coating process
A carbonization device, calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of poor compatibility and poor dispersibility, and achieve the effect of shortening the reaction time and improving the digestion effect.
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Embodiment 1
[0050] Such as figure 1 As shown, a digestion-carbonization device comprises a digester 1, a reaction kettle 2, and a diaphragm pump 3. The digester 1 is provided with a first screen 4 with a mesh number of 200 and a first stirring paddle 5. The first stirring paddle The paddle of 5 is positioned at the below of the first screen cloth 4, and reaction kettle 2 interior is provided with pH meter, and number of meshes is the second screen cloth 6 of 200 purposes and the second stirring paddle 7, and the paddle of the second stirring paddle 7 is positioned at the second Below the screen 6, the bottom of the reactor 2 is also provided with a gas channel;
[0051] The digester 1 is provided with an overflow port, the overflow port is located above the first screen 4, the reactor 2 is provided with a liquid inlet, and the liquid inlet is located above the second screen 6, and the overflow port communicates with the liquid inlet pipeline, The reaction kettle 2 is provided with a circ...
Embodiment 2
[0053] A calcium carbonate nano-coating process is realized using the digestion-carbonization device of Example 1, comprising the steps of: putting the calcium hydroxide suspension into the digester, and the calcium hydroxide suspension contains dissolved calcium hydroxide and untreated The amount of dissolved calcium hydroxide and calcium hydroxide suspension can meet the requirement that the material does not pass through the first screen and the second screen, start the first stirring paddle and the second stirring paddle, turn on the diaphragm pump, and establish the digestion tank and reaction Circulation between kettles;
[0054] (2) Add heavy calcium carbonate to the digester to circulate the material between the digester and the reactor until the solid-liquid is fully mixed;
[0055] (3) feed air and carbon dioxide into the reactor until the pH value of the material in the reactor reaches 7 and stop ventilation;
[0056] (4) Separating the solid and liquid of the mate...
Embodiment 3
[0059] A calcium carbonate nano-coating process is realized using the digestion-carbonization device of embodiment 1, comprising the steps of:
[0060] (1) Put quicklime into the digester, add water, start the first stirring paddle and the second stirring paddle, turn on the diaphragm pump, and establish a circulation between the digester and the reactor, wherein the amount of water added meets the requirement that the material does not pass through the first a screen and a second screen;
[0061] (2) Add heavy calcium carbonate to the digester to circulate the material between the digester and the reactor until the solid-liquid is fully mixed;
[0062] (3) feed air and carbon dioxide into the reactor until the pH value of the material in the reactor reaches 7 and stop ventilation;
[0063] (4) Separating the solid and liquid of the materials in the reactor, drying and pulverizing the solid materials to obtain ground calcium carbonate coated with nanometer surface.
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Abstract
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