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Continuous bubbling carbonizing new process for producing super fine active calcium carbonate

A technology of activated calcium carbonate and new process, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of narrow particle size distribution, large equipment investment, complex technology, etc., to achieve good stability, high equipment production efficiency, and optimized process The effect of the condition

Inactive Publication Date: 2006-03-22
颜鑫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size distribution of this method is narrow, but it still belongs to the batch method of production, the technology is complicated, the energy consumption is high, the output is small, and the equipment investment is large, so it is limited to the production of high-grade nano-calcium carbonate

Method used

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  • Continuous bubbling carbonizing new process for producing super fine active calcium carbonate

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Experimental program
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Effect test

Embodiment 1

[0016] Such as figure 1 As shown, a pre-carbonization tower (1) is provided, the pre-carbonization tower (1), No. Tower (2) has an effective volume of 15 liters, and No. two carbonization towers (3) has an effective volume of 25 liters. Feed CO into the pre-carbonization tower (1) 2 High-concentration carbonized gas with a content of 98% and a flow rate of 4.2m 3 / min, the gas-liquid material between the towers adopts co-current operation, and the Ca(OH) of 100 liters of concentration 10% (mass concentration) is taken 2 slurry, the Ca(OH) 2 The slurry passes through the refined slurry tank (4), pre-carbonization tower (1), No. 1 slurry tank (5), No. 1 carbonization tower (2), No. 2 slurry tank (6), and No. tower (3) and clinker tank (7), the carbonized gas passes through the pre-carbonized tower (1), No. 1 carbonized tower (2) and No. Top emptying. Ca(OH) 2 When the slurry enters the fine slurry tank (4), continuously add 400 gram of sodium sulfate and 270 gram of sodiu...

Embodiment 2

[0018] A pre-carbonization tower (1) is provided, the pre-carbonization tower (1), No. 1 carbonization tower (2) and No. 2 carbonization tower (3) are connected in series, the pre-carbonization tower (1) has an effective volume of 5 liters, and the No. 1 carbonization tower (2 ) effective volume of 15 liters, No. two carbonization tower (3) effective volume of 25 liters. Feed CO into the pre-carbonization tower (1) 2 High-concentration carbonized gas with a content of 80% and a feed rate of 4.2m 3 / min, the gas-liquid material between the towers adopts cross-flow operation, and 200 liters of Ca(OH) with a temperature of 15°C and a concentration of 10% are taken 2 slurry, the Ca(OH) 2 The slurry passes through the refined slurry tank (4), the pre-carbonization tower (1), the No. 1 slurry tank (5), the No. 1 carbonization tower (2), the No. 2 slurry tank (6), and the No. Carbonization tower (3) and clinker tank (7), carbonization gas passes through pre-carbonization tower (1)...

Embodiment 3

[0020] Such as figure 1 As shown, a pre-carbonization tower (1) is provided, the pre-carbonization tower (1), No. Tower (2) has an effective volume of 15 liters, and No. two carbonization towers (3) has an effective volume of 25 liters. Feed CO into the pre-carbonization tower (1) 2 High-concentration carbonized gas with a content of 70% and a feed rate of 4.2m 3 / min, the gas-liquid materials between the towers are operated in parallel, and 200 liters of Ca(OH) with a temperature of 18°C ​​and a concentration of 8% are taken. 2 slurry, the Ca(OH) 2 The slurry passes through the refined slurry tank (4), pre-carbonization tower (1), No. 1 slurry tank (5), No. 1 carbonization tower (2), No. 2 slurry tank (6), and No. Carbonization tower (3) and clinker tank (7), carbonization gas passes through pre-carbonization tower (1), No. 1 carbonization tower (2) and No. The top of the tower is emptied. Ca(OH) 2 When the slurry enters the fine slurry tank (4), continuously add 640 g...

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Abstract

The present invention discloses continuous bubbling carbonizing process for producing superfine active calcium carbonate in the installation with pre-carbonizing tower with high concentration carbonizing gas with CO2 content of 50-99 %, No. 1 carbonizing tower and No. 2 carbonizing tower connected serially. Calcium other slurry passes successively through fine slurry trough, pre-carbonizing tower, No. 1 slurry trough, No. 1 carbonizing tower, No. 2 slurry trough, No. 2 carbonizing tower and chamotte trough; while carbonizing gas passes successively through pre-carbonizing tower, No. 1 carbonizing tower and No. 2 carbonizing tower before being exhausted to air. There are crystal form controlling agent added into the fine slurry trough and dispersant added into the No. 2 slurry trough, and the calcium carbonate slurry in the chamotte trough is prepared into the superfine active calcium carbonate through thickening, activating, dewatering, drying and crushing.

Description

technical field [0001] The invention relates to a carbonization process for calcium carbonate production, in particular to a new continuous bubbling carbonization process for ultrafine active calcium carbonate production. Background technique [0002] The production process of ultrafine activated calcium carbonate mainly includes three key parts: carbonization process, activation process and drying process, and carbonization process is the most basic and critical link. At present, the carbonization process mainly adopts intermittent bubbling carbonization method, intermittent stirred tank carbonization method, continuous spray carbonization method and high gravity reaction crystallization method. The intermittent bubbling carbonization method and the intermittent stirred tank carbonization method are the most widely used methods in China at present. They are based on the production of light calcium carbonate, and the carbonization temperature is controlled by refrigeration, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 颜鑫
Owner 颜鑫
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