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Barium carbonate, preparation method thereof and carbonizer

A technology of barium carbonate and carbonization tower, which is applied in the field of high-reactivity barium carbonate and its preparation, can solve the problems of low reactivity of barium carbonate powder, and achieve slowing down of crystal development and growth, uniform particle size distribution, and increased reaction nucleation speed Effect

Active Publication Date: 2012-10-03
GUIZHOU REDSTAR DEVING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: overcome the barium carbonate crystal development that existing barium carbonate production process exists comparatively complete, the barium carbonate powder reactivity of preparation is relatively low defect, provide a kind of barium carbonate and preparation method thereof, improve The reaction nucleation speed of barium carbonate crystals also inhibits the development and growth of barium carbonate crystals, so the particle size distribution of the obtained barium carbonate powder is uniform, and there is no agglomeration between the particles, and a highly reactive barium carbonate product is prepared.

Method used

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  • Barium carbonate, preparation method thereof and carbonizer
  • Barium carbonate, preparation method thereof and carbonizer
  • Barium carbonate, preparation method thereof and carbonizer

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preparation example Construction

[0027] Below in conjunction with carbonization tower, describe the preparation method of barium carbonate of the present invention in detail. The method includes:

[0028] The first step is to prepare a barium sulfide solution with a concentration of 120-170g / L (preferably 120-140g / L), and maintain its temperature at 65-75°C;

[0029] In the second step, the barium sulfide solution is sent to the cavity 11 of the carbonization tower, so that the barium sulfide solution accounts for 50-70% (preferably 60%) of the volume of the cavity 11;

[0030] In the third step, the carbon dioxide gas is passed into the center pipe 3; at the same time, the barium sulfide solution circulates through the circulation pipe 4, flows into the circulation pipe 4 from the chamber 11, and is then sprayed into the center pipe 3 by the injector 6, and is carried out with the carbon dioxide gas. reaction;

[0031] In the fourth step, the solution containing barium sulfide continues to circulate throug...

Embodiment 1

[0046] The carbonization tower used in this embodiment is made of corrosion-resistant stainless steel. The cavity 11 is a cylinder with a diameter of 2m×a height of 3m. The central tube 3 is DN with a diameter of 150mm and a length of 2m.

[0047] A barium sulfide solution with a concentration of 120 g / L was prepared and its temperature was maintained at 65°C. The barium sulfide solution is routinely pumped into the cavity 11 of the carbonization tower, so that the barium sulfide solution accounts for 50% of the volume of the cavity 11, and the lower end of the carbonization tower central tube 3 is located under the barium sulfide solution liquid level. Open the valve 21, the valve 41, the valve 43, and the valve 51, and the carbon dioxide gas enters the center pipe 3 continuously through the intake pipe 2, and the flow rate in the center pipe 3 is 1400Nm 3 / h. At the same time, the barium sulfide solution in the carbonization tower continuously circulates through the circula...

Embodiment 2

[0050] The carbonization tower used in this embodiment is made of corrosion-resistant stainless steel. The cavity 11 is a cylinder with a diameter of 2m×a height of 3m. The central tube 3 is DN with a diameter of 120mm and a length of 2m.

[0051] A barium sulfide solution with a concentration of 140 g / L was prepared and its temperature was maintained at 65°C. The barium sulfide solution is routinely pumped into the cavity 11 of the carbonization tower, so that the barium sulfide solution accounts for 60% of the volume of the cavity 11, and the lower end of the carbonization tower central tube 3 is located under the barium sulfide solution liquid level. Open the valve 21, the valve 41, the valve 43, and the valve 51, and the carbon dioxide gas enters the center pipe 3 continuously through the intake pipe 2, and the flow rate in the center pipe 3 is 1600Nm 3 / h. At the same time, the barium sulfide solution in the carbonization tower continuously circulates through the circula...

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Abstract

The invention relates to barium carbonate, a preparation method of the barium carbonate and a carbonizer. The preparation method of barium carbonate comprises the steps of: (1) conveying barium sulfide solution to the carbonizer, wherein the barium sulfide solution has the solubility of 120-170g / L at the temperature of 65-75 DEG C; (2) introducing carbon dioxide gas to a central tube (3) of the carbonizer, and simultaneously spraying the barium sulfide solution to the central tube (3) of the carbonizer to react with carbon dioxide gas; and (3) persistently and circularly spraying the solution containing barium sulfide to the central tube (3) of the carbonizer by a circulating pipe (4), stopping reaction until the barium sulfide concentration in the solution containing barium sulfide is smaller than 0.25g / L, and carrying out solid-liquid separation to obtain the barium carbonate product. According to the barium carbonate, a preparation method of the barium carbonate and a carbonizer provided by the invention, the barium sulfide solution is sprayed by single tower body internal circulation of the carbonizer, so that rapid reaction is carried out between the barium sulfide solution and the carbon dioxide gas, the reaction nucleation rate is increased and the crystal development and growth is slow, therefore, obtained barium carbonate has narrow particle size distribution, and the reaction activity is increased to more than 85%.

Description

technical field [0001] The invention relates to a barium carbonate and a preparation method thereof, in particular to a highly reactive barium carbonate and a preparation method thereof. Background technique [0002] Industrial barium carbonate is widely used in ceramics, glass, magnetic materials and various barium salt matrix materials. In recent years, with the improvement of the salt chemical industry and the development of water environment treatment, new requirements have been put forward for the non-dissolved state and solid-liquid reactivity of barium carbonate. [0003] The traditional production of barium carbonate adopts the multi-stage series series carbon dioxide kiln gas bubbling reaction production process of barium sulfide solution. Due to the relatively complete development of barium carbonate crystals under this process, the wide particle size distribution, and the existence of many super large particles and barium carbonate aggregates, the preparation The...

Claims

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Application Information

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IPC IPC(8): C01F11/18
Inventor 姜志光华东孙振才刘湘玉
Owner GUIZHOU REDSTAR DEVING
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