Method and device for producing calcium carbonate through dynamical carbonation method

A technology of calcium carbonate and carbonization method, which is applied in the fields of calcium carbonate/strontium/barium, chemical instruments and methods, inorganic chemistry, etc. It can solve the problems of large consumption of dynamic method and low utilization rate of carbon dioxide, etc., so as to save carbonization time and increase gas -The effect of liquid contacting the surface and prolonging the gas-liquid contact time

Active Publication Date: 2018-06-01
石家庄市红星钙业有限公司
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Problems solved by technology

[0004] Aiming at the problems of large consumption and low utilization rate of carbon dioxide in the existing dynamic method, the present invention provides a method for producing calcium carbonate by dynamic carbonization

Method used

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  • Method and device for producing calcium carbonate through dynamical carbonation method
  • Method and device for producing calcium carbonate through dynamical carbonation method

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Embodiment 1

[0058] The embodiment of the present invention provides a kind of dynamic carbonization method to produce the device of calcium carbonate, refer to the attached figure 1 and 2 , including a reaction tank 21, and also includes: a dynamic reactor 25, suspended and confined in the reaction tank 21, the bottom end of the dynamic reactor 25 is open, and an umbrella-shaped gas distributor 26 is provided;

[0059] CO 2 Proportioner 14 for blending CO 2 The volume content of the gas is communicated with the upper end of the dynamic reactor 26 through a pipeline;

[0060] The slurry return pipe 22, the liquid inlet port communicates with the return port at the bottom of the reaction tank 21, and the liquid outlet port communicates with the upper end of the dynamic reactor 25 through a return pump 29;

[0061] The pH measuring device 23 is arranged on the side wall of the reaction tank 21 .

[0062] A spray device 24 is provided at the outlet end of the slurry return pipe 22 . The ...

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Abstract

The invention relates to the technical field of production of calcium carbonate and in particular discloses a method and a device for producing the calcium carbonate through a dynamical carbonation method. The method comprises the following steps: suspending and limiting a dynamic reactor provided with a reaction cavity and a downward opening in a reaction tank; adding prepared Ca(OH)2 slurry intothe reaction tank and immersing the opening of the dynamic reactor; pumping the Ca(OH)2 slurry in the reaction tank through a reflowing pump and spraying and reflowing in a reaction cavity of the dynamic reactor; meanwhile, introducing CO2-containing mixed gas into the reaction cavity; monitoring the pH (Potential of Hydrogen) value of reaction slurry in the reaction tank; when the pH value is 7to 8, stopping the reflowing of the slurry to prepare a calcium carbonate crude product. According to the method and the device for producing the calcium carbonate through the dynamical carbonation method, provided by the invention, the carbonation speed is improved by 60 percent and the carbonation time is shortened by 37.5 percent; the grain diameter of the generated calcium carbonate is 2 to 4microns and the utilization rate of the carbon dioxide is improved to 69 percent from original 50 percent.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate production, in particular to a method and a device for producing calcium carbonate by a dynamic carbonization method. Background technique [0002] At present, the main method of producing light calcium carbonate at home and abroad is the calcium hydroxide carbonization method. This method is to calcine selected limestone to obtain calcium oxide and kiln gas. Calcium oxide is digested, and the generated suspended calcium hydroxide is crushed under the action of high shear force, and the particles and impurities are removed by multi-stage hydrocyclone separation to obtain a certain concentration of refined calcium hydroxide suspension; then carbon dioxide gas is introduced, Add an appropriate crystal form control agent, carbonize to the end, and obtain a calcium carbonate slurry in the crystal form; finally, dehydrate, dry, and surface treat to obtain an ultrafine calcium carbonate produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/181C01P2004/61
Inventor 白玉杰白永杰白贵平
Owner 石家庄市红星钙业有限公司
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