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Process of preparing calcium carbonate by air bubble film method and application thereof

A technology of bubble film and calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of long reaction time of calcium carbonate, uneven and stable product quality, etc. Achieve the effects of avoiding the reduction of reaction rate, uniform and stable quality, and regular shape

Active Publication Date: 2019-05-31
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a process for preparing calcium carbonate by bubble film method and its application to solve the technical problems of long reaction time and uneven and stable product quality in the preparation of calcium carbonate in the prior art

Method used

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  • Process of preparing calcium carbonate by air bubble film method and application thereof
  • Process of preparing calcium carbonate by air bubble film method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of bubble film method prepares calcium carbonate technology, comprises the following steps:

[0032] (1) Digestion: The medium-burned lime and hot water are poured into a rotary digester at a mass percentage ratio of 1:6 for digestion. The prepared calcium hydroxide emulsion is filtered through a 100-mesh vibrating screen to remove slag, and then passed through a rotary digester. Liquid separator further removes slag to obtain refined calcium hydroxide slurry, adjust the concentration of calcium hydroxide slurry to 12%, and age the refined calcium hydroxide slurry for 24 hours;

[0033] (2) Carbonization: pump the calcium hydroxide slurry prepared in step (1) into the carbonization reactor, the carbonization reactor is a gas dispersing disk with uniform and dense pores at the bottom, and the inside of the reactor is equipped with strong stirring The carbonization reaction device of the device; open the kiln gas valve and feed in the 2 The kiln gas with a volume ...

Embodiment 2

[0037] A kind of bubble film method prepares calcium carbonate technology, comprises the following steps:

[0038] (1) Digestion: The medium-burned lime and hot water are poured into a rotary digester at a mass percentage ratio of 1:5 for digestion. The prepared calcium hydroxide emulsion is filtered through an 80-mesh vibrating screen to remove slag, and then passed through a rotary digester. Liquid separator for further deslagging to obtain refined calcium hydroxide slurry, adjust the concentration of calcium hydroxide emulsion to 13%, and the refined calcium hydroxide slurry is not aged;

[0039] (2) Carbonization: pump the calcium hydroxide slurry prepared in step (1) into the carbonization reactor, the carbonization reactor is a gas dispersing disk with uniform and dense pores at the bottom, and the inside of the reactor is equipped with strong stirring The carbonization reaction device of the device; open the kiln gas valve and feed in the 2The kiln gas with a volume co...

Embodiment 3

[0043] A kind of bubble film method prepares calcium carbonate technology, comprises the following steps:

[0044] (1) Digestion: The medium-burned lime and hot water are poured into the rotary digester at a mass percentage ratio of 1:7 for digestion reaction. The prepared calcium hydroxide emulsion is filtered through a 100-mesh vibrating screen to remove slag, and then passed through a rotary digester. Liquid separator for further slag removal to obtain refined calcium hydroxide slurry, adjust the concentration of calcium hydroxide emulsion to 10%, and age the refined calcium hydroxide slurry for 36 hours;

[0045] (2) Carbonization: pump the calcium hydroxide slurry prepared in step (1) into the carbonization reactor, the carbonization reactor is a gas dispersing disk with uniform and dense pores at the bottom, and the inside of the reactor is equipped with strong stirring The carbonization reaction device of the device; open the kiln gas valve and feed in the 2 The kiln g...

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Abstract

The invention discloses a process of preparing calcium carbonate by an air bubble film method and application thereof and belongs to the technical field of preparation of inorganic nonmetal calcium carbonate powders. The process herein comprises carbonization and surface treatment; refined calcium hydroxide slurry is quickly carbonized in an air bubble film quick carbonizing reactor; a slurry fromthe reaction is subjected to suitable surface treatment as required; the treated slurry is filtered, drying is carried out before crushing, and screening is performed to obtain calcium carbonate powder uniform in particle size. The process herein has no need for adding a crystal form control agent; the crystal morphology is controllable; the finished product has uniform particle size and good dispersity; the process is simple and feasible and has low production cost; the prepared calcium carbonate powder is applicable to the industries of plastics, rubber, papermaking, foods, medicine, and cosmetics, and has good economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic calcium carbonate powder, and in particular relates to a process for preparing calcium carbonate powder by carbonization of calcium hydroxide and its application. Background technique [0002] The carbonation process is very important in the production process of calcium carbonate. Crystallization control technology includes pure process control technology and additive control technology. Calcium carbonate production in Japan is mainly based on process control technology, and European countries such as Germany are mainly based on additive control technology. At present, there are many kinds of carbonation reactors for preparing nano-calcium carbonate in China, including traditional bubbling carbonation reactors, intermittent bubbling stirring carbonation reactors, and newly used spray carbonation reactors, supergravity carbonation reactors Reactor, Venturi jet carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00B82Y30/00
Inventor 王权广童张法李立硕廖丹葵覃玲意黄绍权周文英钟玲萍蒙杨平
Owner GUANGXI UNIV
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