Preparation method of barium carbonate and barium carbonate prepared by using same

A technology of barium carbonate and barium sulfide, applied in the direction of barium carbonate, calcium carbonate/strontium/barium, etc., can solve the problems of reducing costs and solid waste, and achieve the effects of reducing treatment costs, large environmental benefits, and multiple economic benefits

Active Publication Date: 2018-11-13
GUIZHOU REDSTAR DEVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional industrial barium carbonate process mostly uses barite and anthracite as raw materials, and is produced through batching, roasting, leaching, carbonization, drying and other processes,

Method used

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  • Preparation method of barium carbonate and barium carbonate prepared by using same
  • Preparation method of barium carbonate and barium carbonate prepared by using same
  • Preparation method of barium carbonate and barium carbonate prepared by using same

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preparation example Construction

[0032] Barium carbonate preparation method of the present invention comprises:

[0033] The first step is to purify low-concentration yellow water: settle the yellow water and press filter to obtain pure yellow water.

[0034] In the present invention, yellow water refers to the leaching solution that barite reduction roasting produces BaS clinker, and its main component is Ba(OH) 2 、Ba(HS) 2 , the concentration of yellow water mentioned in the art is usually represented by barium sulfide concentration, which is just a common expression in the art.

[0035] Specifically, the leached low-concentration yellow water is poured into the low-concentration yellow water clarification tank, and the purpose of clarification is achieved through natural sedimentation. Because it also contains fine impure suspended matter, it is filtered through a plate and frame filter press to obtain pure yellow water. . After sedimentation and pressure filtration, impurities such as insoluble matter ...

Embodiment 1

[0056] (1) Put the yellow water into the low-concentration yellow water clarification tank, achieve the purpose of clarification by natural sedimentation, and then press filter through a plate and frame filter press to remove fine impure suspended matter, and obtain pure low-concentration yellow water, which is a concentration of 50g / L BaS solution.

[0057] (2) Add 0.3mol / L sodium hydroxide solution to pure yellow water with a constant flow pump to control Na + When the concentration is 0.015mol / L, stop the pretreatment.

[0058] (3) The pretreated BaS solution and the process circulating water are subjected to the addition reaction, and the flow rates of the BaS solution and the process circulating water are respectively 3m 3 / h and 15m 3 / h, the reaction time is 15 minutes, the pH value of the reaction end point is controlled to be 11, and then it is naturally settled for 2 hours. After completion, the slurry is filtered, the solid is collected, and the solution is retain...

Embodiment 2

[0061] (1) Put the yellow water into the low-concentration yellow water clarification tank, achieve the purpose of clarification by natural sedimentation, and then press filter through a plate and frame filter press to remove fine impure suspended matter, and obtain pure low-concentration yellow water, which is a concentration of 30g / L BaS solution.

[0062] (2) Add 0.1mol / L sodium hydroxide solution to pure yellow water with a constant flow pump to control Na + When the concentration is 0.01mol / L, stop the pretreatment.

[0063] (3) The pretreated BaS solution and the process circulating water are subjected to the addition reaction, and the flow rates of the BaS solution and the process circulating water are respectively 3m 3 / h and 10m 3 / h, the reaction time is 30 minutes, the pH value of the reaction end point is controlled to be 9.5, and then it is naturally settled for 5 hours. After completion, the slurry is filtered, the solid is collected, and the solution is retain...

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Abstract

The invention provides a preparation method of barium carbonate. The preparation method comprises the following steps: naturally settling yellow water, and filter-pressing, to obtain the pure yellow water; adding a desulfurizing agent into the pure yellow water and pre-processing, wherein the desulfurizing agent is sodium hydroxide solution or soluble sodium salt solution, while a Na<+> concentration in reaction solution reaches 0.01 mol/L to 0.025 mol/L, stopping pre-processing, to obtain the pre-processed yellow water; enabling the pre-processed yellow water to perform a continuous convection current synthetic reaction with technology circulating water, while a pH value of reaction slurry reaches 9.5-11.5, stopping the reaction, performing continuous sedimentation curing on the reactionslurry, and performing solid-liquid separation, collecting a solid; washing and drying the collected solid, to obtain a barium carbonate product. The invention further provides the barium carbonate product prepared by using the method. The content of the barium carbonate is greater than or equal to 99.48wt%. The method is capable of, through performing decarbonization recovery on the technology circulating water, preparing the industrial barium carbonate, improving a recovery rate of the barium carbonate production to the greatest extent, reducing the generation of solid wastes, and in complywith the requirements of national resource conservation and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of resource recycling. Specifically, the invention relates to a method for preparing barium carbonate by circulating process water, and the barium carbonate prepared by the preparation method. Background technique [0002] Barium carbonate is an important product in the inorganic salt industry. It is widely used in magnetic materials, PTC electronic ceramics, liquid crystal substrate glass, architectural ceramics, water purification and other basic raw materials of barium salts. The optimization of its production process has a great effect on reducing costs and reducing waste emissions. Great significance. [0003] The traditional industrial barium carbonate process mostly uses barite and anthracite as raw materials, and is produced through batching, roasting, leaching, carbonization, drying and other processes, but this production method does not recycle the process water. Part of the barium carbonate ente...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/188
Inventor 郭汉光梁启波杨德林丁志文曾开文李鸣鹏周焕钊张浪
Owner GUIZHOU REDSTAR DEVING
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