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Method for preparing barium hydroxide by using barium carbonate

A technology of barium hydroxide and barium carbonate, which is applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of high production cost, long process flow, and deterioration of the working environment of workers, and achieve lower roasting temperature and lower Production cost, the effect of improving the utilization rate of equipment volume

Active Publication Date: 2014-07-23
HUNAN SHIZHUYUAN NON FERROUS METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] This method consumes a large amount of alkali in the production process, and will produce highly toxic H 2 S, causing the deterioration of the working environment of workers, and the process is long and the production cost is high

Method used

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  • Method for preparing barium hydroxide by using barium carbonate
  • Method for preparing barium hydroxide by using barium carbonate
  • Method for preparing barium hydroxide by using barium carbonate

Examples

Experimental program
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Embodiment 1

[0041] a kind of like figure 1Shown adopting witherite of the present invention is the method for raw material preparation barium hydroxide, comprises the following steps:

[0042] (1) Grinding: The witherite mineral is finely ground into mineral powder with a particle size below 1.0mm. During the grinding process, the mineral is dried at the same time to make the water content of the mineral powder less than 3%.

[0043] (2) Preheating: The barium carbonate particles in the powder bin 1 are weighed and measured by the electronic belt scale 2, and then enter the first-stage cyclone preheater 3, the second-stage cyclone preheater 4 and the third-stage cyclone preheater 5 During the preheating process, the heat exchange with the hot flue gas is carried out countercurrently, and the feed rate is controlled at 5t / h; during the preheating process, the hot flue gas continuously introduced makes the ore powder in a suspended fluidized state, and the hot flue gas comes from the subseq...

Embodiment 2

[0048] a kind of like figure 1 Shown the present invention adopts the BaCO produced by a certain chemical industry 3 Powder is raw material and prepares barium hydroxide, and this method specifically comprises the following steps:

[0049] (1) Grinding: the BaCO produced by a chemical production 3 The powder is finely ground to make mineral powder with a particle size of less than 1.0mm. During the grinding process, the mineral is dried at the same time to make the water content of the mineral powder less than 3%.

[0050] (2) Preheating: The barium carbonate particles in the powder bin 1 are weighed and measured by the electronic belt scale 2, and then enter the first-stage cyclone preheater 3, the second-stage cyclone preheater 4 and the third-stage cyclone preheater 5 During the preheating process, the heat exchange with the hot flue gas is carried out countercurrently, and the feed rate is controlled at 5t / h; during the preheating process, the hot flue gas continuously i...

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Abstract

The invention discloses a method for preparing barium hydroxide by using barium carbonate. The method comprises the following steps of firstly grinding ores containing barium carbonate into ore powder, carrying out high-temperature roasting on the ore powder in a suspension fluidized state to obtain roasted ore containing barium hydroxide, soaking the roasted ore in water to react and generate a barium hydroxide solution, carrying out solid-liquid separation on the barium hydroxide solution, cooling and crystallizing to obtain barium hydroxide products. The method for preparing the barium hydroxide by using the barium carbonate, disclosed by the invention, has the advantages that the heat transfer area of the ore powder is large, each ore particle can uniformly and totally finish a chemical reaction, the reaction time is short, and the utilization rate of barium carbonate is high.

Description

technical field [0001] The invention relates to a method for preparing barium hydroxide, in particular to a method for preparing barium hydroxide with barium carbonate. Background technique [0002] Barium hydroxide has a wide range of uses and strong applicability. It is widely used in the manufacture of barium-based grease, plastic stabilizers and multi-functional additives for petrochemical products. It is also the first choice for purifying chemical products such as refined oil and sucrose. [0003] There are two traditional production methods of barium hydroxide: [0004] (1) Witherite hydrolysis process: This process is to process witherite (BaCO 3 ) roasted at high temperature to make BaCO 3 Decomposed into BaO, then hydrolyzed to get Ba(OH) 2 , whose reaction is: [0005] [0006] BaO+H 2 O→Ba(OH) 2 (2) [0007] The key point of this method is roasting. The furnace types used are generally tunnel kilns and downdraft kilns, and the roasting temperature i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/06
Inventor 刘小银陈雯严小虎李家林陆晓苏张翔宇
Owner HUNAN SHIZHUYUAN NON FERROUS METAL
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