System device and method for preparing calcium carbonate by using micro-nano bubbles

A technology of micro-nano bubbles and system devices, applied in the field of calcium carbonate, can solve the problems of difficulty in obtaining qualified nano-calcium carbonate products, affecting the carbonization and crystallization process, and low purity of calcium carbonate
CN112897561AActive Publication Date: 2021-06-04INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2021-06-04

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Abstract

The invention provides a system device and method for preparing calcium carbonate by using micro-nano bubbles, and the system device comprises a micro-nano bubble generation device and a reaction device which are connected with each other, and also comprises a first separation device and a centrifugal device which are separately connected with the reaction device, and a second separation device and a third separation device which are separately connected with the centrifugal device. The method for preparing calcium carbonate by using the micro-nano bubbles in the system device comprises the following steps: generating the micro-nano bubbles by using the micro-nano bubble generation device, enabling the micro-nano bubbles to enter the reaction device to be mixed with carbide slag for carbonization reaction, and then introducing the reaction system into the centrifugal device for separation, thereby obtaining calcium carbonate particles. According to the method, the grain size of calcium carbonate is controlled by carbonizing the carbide slag through the micro-nano bubbles, a crystal form control agent is not used, continuous operation can be achieved, intermittent operation can also be achieved, and the method and device have the advantages of being large in treatment capacity, high in carbonization speed, low in cost and the like.
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Description

technical field

[0001] The invention relates to the technical field of calcium carbonate, in particular to a system device and method for preparing calcium carbonate by using micro-nano bubbles. Background technique

[0002] Carbide slag is an industrial solid waste formed during the production of acetylene by the calcium carbide method. Its main component is calcium hydroxide and contains impurities such as coke, ferrosilicon and aluminum-silicon minerals. Calcium carbide slag has a high content of calcium and can replace slaked lime for the preparation of nano-calcium carbonate (grain size less than 100nm). However, because calcium carbide slag contains impurities such as coke, ferrosilicon, aluminum-silicon minerals, and non / low-active calcium particles, it may affect the purity of nano-calcium carbonate, and also affect the crystal structure and morphology of nano-calcium carbonate.

[0003] CN100457632C discloses a preparation method of nano-active calcium carbonate, i...

Claims

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