Method for preparing strontium carbonate salt from metal strontium slag

A technology of strontium carbonate and metal strontium, which is applied in the directions of calcium carbonate/strontium/barium, chemical instruments and methods, organic dyes, etc., can solve the problem of high cost of strontium salt, and achieve the effects of low production cost and simple production process

Active Publication Date: 2008-01-09
山东云信铝业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the high cost of preparing strontium salt from existing strontium slag, and a simple and feasible method for preparing strontium carbonate salt by using strontium slag is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Crush 100kg of metal strontium slag with a crusher and pass through an 80-mesh screen to obtain strontium slag powder;

[0019] 2. Slowly add the strontium slag powder to boiling water in batches, control the temperature at 70°C, and stir while adding the strontium slag powder to make the strontium slag powder fully react to form soluble strontium hydroxide;

[0020] 3. Separate the solution by a centrifugal separator or filter to obtain a strontium hydroxide solution. Since the solubility of strontium hydroxide increases with the increase of temperature, in order to ensure that strontium hydroxide does not precipitate, the process temperature is controlled at 50°C. ;

[0021] 4. Add 45kg of ammonium bicarbonate to the above strontium hydroxide solution, while stirring while adding ammonium bicarbonate, to make the reaction proceed fully;

[0022] 5. Separate the solution through a centrifugal separator or filter to obtain a precipitate of strontium carbonate;

[0023] 6...

Embodiment 2

[0025] 1. Crush 100 kg of metal strontium slag with a crusher and pass through a 100-mesh screen to obtain strontium slag powder;

[0026] 2. Slowly add the strontium slag powder to boiling water in batches, control the temperature at 85°C, and stir while adding the strontium slag powder to make the strontium slag powder fully react to produce soluble strontium hydroxide;

[0027] 3. Separate the solution by a centrifugal separator or filter to obtain a strontium hydroxide solution. Since the solubility of strontium hydroxide increases with the rise of temperature, in order to ensure that strontium hydroxide does not precipitate, the process temperature is controlled at 65°C. ;

[0028] 4. Add 56kg of ammonium carbonate to the above strontium hydroxide solution, while stirring while adding ammonium carbonate, to make the reaction proceed fully;

[0029] 5. Separate the solution through a centrifugal separator or filter to obtain a precipitate of strontium carbonate;

[0030] 6. Dr...

Embodiment 3

[0032] 1. Crush 100 kg of strontium metal slag with a crusher and pass through a 120-mesh screen to obtain strontium slag powder;

[0033] 2. Slowly add the strontium slag powder to boiling water in batches, control the temperature at 100°C, and stir while adding the strontium slag powder to fully react the strontium slag powder to produce soluble strontium hydroxide;

[0034] 3. Separate the solution by a centrifugal separator or filter to obtain a strontium hydroxide solution. Since the solubility of strontium hydroxide increases with the rise of temperature, in order to ensure that strontium hydroxide does not precipitate, the process temperature is controlled at 80°C. ;

[0035] 4. Add 48kg of sodium bicarbonate to the above strontium hydroxide solution, while stirring while adding sodium bicarbonate, to make the reaction proceed fully;

[0036] 5. Separate the solution through a centrifugal separator or filter to obtain a precipitate of strontium carbonate;

[0037] 6. Dry th...

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PUM

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Abstract

This invention relates to production of strontium carbonate salt by using strontium slag as raw material. The procedures are: (1), crashing the slag into powder; (2), putting said powder into boiling water and agitating thoroughly, to produce soluble strontium hydroxide during reaction; (3), obtaining the solution after centrifuging or filtering; (4), adding carbonate or bicarbonate, together with agitation to make through reaction; (5), obtaining precipitate of strontium carbonate by filtering or centrifuging, (6), drying said precipitate to obtain the inventive product. In this invention, due to the use of boiling water as a substitute for inorganic acid, the production cost is reduced and the production process is simplified.

Description

Technical field [0001] The invention relates to a method for extracting strontium carbonate from metal strontium slag. Background technique [0002] The preparation method of metal strontium is mainly the vacuum thermite reduction method, that is, strontium carbonate powder is used as raw material, and it is decomposed into strontium oxide by high-temperature calcination, and reduced with aluminum powder at high temperature under vacuum condition, and at the same time, strontium metal is obtained by distillation and purification. At present, the actual strontium production rate in production is only 50-65%, and nearly half of the strontium remains in the slag. These slags have been buried deep as waste slag, and some are directly exposed to the outside. Once they are wetted by rain, they will be exposed. Generate alkaline substances, alkalinize soil and groundwater, and seriously disrupt ecological balance. With the increasing application of strontium metal in electronic informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C04B5/00C09B3/00
Inventor 梅小明诸天柏陶卫建刘小稻佟龙福王殊
Owner 山东云信铝业科技有限公司
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