CN103936049A - Preparation method of strontium chloride hexahydrate - Google Patents
Preparation method of strontium chloride hexahydrate Download PDFInfo
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- CN103936049A CN103936049A CN201310022478.XA CN201310022478A CN103936049A CN 103936049 A CN103936049 A CN 103936049A CN 201310022478 A CN201310022478 A CN 201310022478A CN 103936049 A CN103936049 A CN 103936049A
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- strontium
- strontium chloride
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Abstract
The invention discloses a preparation method of strontium chloride hexahydrate, and the preparation method comprises the following steps: using a hydrochloric acid method for extracting strontium from strontium slag, slurrying, grinding, filtering by press, proportioning, dissolving, neutralizing for slag removal, filtering by press, washing slag with filtering by press, evaporating for crystallizing, and drying. The recovery rate of strontium of the method is high (85%-90%), a lot of useful strontium in the strontium slag can be recovered for preparation of strontium chloride hexahydrate, and the method has important values on recycle of strontium ore slag.
Description
Technical field
The present invention relates to the preparation method of six water strontium chlorides, particularly hydrochloric acid legal system is for six water strontium chlorides.
Background technology
Six water strontium chlorides can be used for manufacturing the fusing assistant of high-grade magneticsubstance, electrolytic metal sodium, high-grade pigment and liquid-crystalline glasses, also can be used for pharmaceutical industry and daily-use chemical industry etc., have very high economic worth.
The production of six water strontium chlorides is generally to adopt Strontium carbonate powder as raw material, adds hydrochloric acid, obtain strontium chloride solution, then evaporative crystallization obtains six water strontium chloride products.When adopting lazurite as raw material production Strontium carbonate powder, because the impact of calcium in lazurite causes the rate of recovery of strontium to be about 60%, lazurite is produced the strontiums that contain a large amount of worth recyclings in the strontium slag of Strontium carbonate powder, and the strontium of therefore recycling in strontium slag is significant.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of preparation method of six water strontium chlorides is provided, and the mine tailing that utilizes lazurite to produce after Strontium carbonate powder is that strontium slag is prepared six water strontium chlorides.
The present invention realizes by following technical proposals:
1, strontium slag is added to water stirring and carry out pulp, be controlled at 800g/L ~ 1000g/L solid the containing of pulp;
2, the mode that employing wet-milling adds screening is by strontium sizing carefully to 100 ~ 150 order;
3, adopt the mode of press filtration to carry out press filtration to levigate strontium slag and bring the water in flow process into reduce strontium slag, the filtrate that press filtration obtains is returned strontium slag is carried out to pulp;
4, the hydrochloric acid that is 25% ~ 30% by concentration joins in the strontium slag after press filtration and stir stripping under normal pressure, obtains strontium chloride slurries, the about 10min ~ 30min of dissolution time;
5, in strontium chloride slurries, add aqua calcis to remove the sulfite ion in solution, control the pH value of solution 6 ~ 7, ion concentration of inferior sulfate radical free in solution is less than or equal to 0.2g/L;
6, adopt press filtration to strontium chloride slurries are carried out to liquid-solid separation, obtain strontium chloride solution and tailings;
7, adopt the secondary vapour water of condensation of evaporation to wash press filtration again to reclaim the strontium chloride in tailings attached liquid to tailings, obtain the washing lotion of chloride containing strontium and clean tailings, washing lotion is returned to configuration aqua calcis;
8, strontium chloride solution is evaporated, then crystallisation by cooling obtains six water strontium chloride crystal, and the secondary vapour water of condensation of evaporation returns tailings is washed;
9, six water strontium chloride crystalloid solutions are carried out to suction filtration, obtain saturated strontium chloride solution and six water strontium chloride crystal, saturated strontium chloride solution returns and continues evaporation, and six water strontium chloride crystal are dried, obtain six water strontium chloride finished products, drying source can be hot water or warm air.
The present invention utilizes lazurite to produce the strontium containing in strontium slag after Strontium carbonate powder to prepare six water strontium chlorides, improved raw material availability, reduced the waste of resource, and extraction rate reached is to 85% to 90%.
Accompanying drawing explanation
Fig. 1 is the process flow sheet that salt acid system is produced six water strontium chlorides.
Specific embodiment
Embodiment 1:
1, a certain amount of strontium slag is stirred and carries out pulp with addition of a certain amount of water, as the strontium slag of getting 800g stirs pulp with addition of the water of 800g, be controlled at 800g/L solid containing.
2, the strontium slag after adopting ball mill to pulp carries out ball milling, controls the granularity of ball milling at 100 orders, and the strontium slag after ball milling sieves, and the underproof strontium slag of granularity returns to continuation ball milling, and the strontium Zha Daoxiaxu workshop section of release mesh carries out press filtration.
3, adopt plate-and-frame filter press to carry out press filtration to levigate strontium slag, the filtrate that press filtration obtains is returned strontium slag is carried out to pulp, and the strontium slag that press filtration obtains enters dosing vessel by Belt Conveying and carries out stripping.
4, concentration is about to 27% hydrochloric acid and joins in dosing vessel stir stripping under normal pressure, control the about 10min of dissolution time and obtain strontium chloride slurries.
5, utilize the washing water configuration aqua calcis of tailings, the aqua calcis configuring is joined and in dosing vessel, neutralizes to remove the sulfite ion in solution, control the pH value of solution 6.5, ion concentration of inferior sulfate radical free in solution is less than or equal to 0.1g/L.After neutralizing, obtain strontium chloride slurries.
6, adopt plate-and-frame filter press to strontium chloride slurries are carried out to liquid-solid separation, obtain the gravity flow of strontium chloride solution and enter strontium chloride solution tank, the tailings obtaining enters rinse bath by Belt Conveying.
7, the secondary vapour water of condensation of evaporation is sent into rinse bath tailings is carried out to agitator treating, adopt plate-and-frame filter press to tailings again press filtration to reclaim the strontium chloride in tailings attached liquid, obtain filtrate gravity flow and enter filtrate receiver configure aqua calcis, the tailings obtaining after press filtration by Automobile Transportation to stockyard.
8, adopt triple effect evaporation to evaporate strontium chloride solution, strontium chloride solution evaporation is carried out to crystallisation by cooling to sending into crystallisation by cooling groove after saturation concentration.
9, six water strontium chloride crystalloid solutions are carried out to suction filtration, obtain saturated strontium chloride solution and six water strontium chloride crystal, saturated strontium chloride solution returns and continues evaporation, and six water strontium chloride crystal by adopting hot water are dried, hot water temperature is 50 ℃, obtains six water strontium chloride finished products.
Embodiment 2:
1, a certain amount of strontium slag is stirred and carries out pulp with addition of a certain amount of water, as the strontium slag of getting 900g stirs pulp with addition of the water of 775g, be controlled at 900g/L solid containing.
2, the strontium slag after adopting ball mill to pulp carries out ball milling, controls the granularity of ball milling at 150 orders, and the strontium slag after ball milling sieves, and the underproof strontium slag of granularity returns to continuation ball milling, and the strontium Zha Daoxiaxu workshop section of release mesh carries out press filtration.
3, adopt plate-and-frame filter press to carry out press filtration to levigate strontium slag, the filtrate that press filtration obtains is returned strontium slag is carried out to pulp, and the strontium slag that press filtration obtains enters dosing vessel by Belt Conveying and carries out stripping.
4, concentration is about to 25% hydrochloric acid and joins in dosing vessel stir stripping under normal pressure, controlling dissolution time is that 20min obtains strontium chloride slurries.
5, utilize the washing water configuration aqua calcis of tailings, the aqua calcis configuring is joined and in dosing vessel, neutralizes to remove the sulfite ion in solution, control the pH value of solution 6, in solution, free ion concentration of inferior sulfate radical is 0.2g/L.After neutralizing, obtain strontium chloride slurries.
6, adopt plate-and-frame filter press to strontium chloride slurries are carried out to liquid-solid separation, obtain the gravity flow of strontium chloride solution and enter strontium chloride solution tank, the tailings obtaining enters rinse bath by Belt Conveying.
7, the secondary vapour water of condensation of evaporation is sent into rinse bath tailings is carried out to agitator treating, adopt plate-and-frame filter press to tailings again press filtration to reclaim the strontium chloride in tailings attached liquid, obtain filtrate gravity flow and enter filtrate receiver configure aqua calcis, the tailings obtaining after press filtration by Automobile Transportation to stockyard.
8, adopt triple effect evaporation to evaporate strontium chloride solution, strontium chloride solution evaporation is carried out to crystallisation by cooling to sending into crystallisation by cooling groove after saturation concentration.
9, six water strontium chloride crystalloid solutions are carried out to suction filtration, obtain saturated strontium chloride solution and six water strontium chloride crystal, saturated strontium chloride solution returns and continues evaporation, and six water strontium chloride crystal by adopting hot water are dried, hot water temperature is 60 ℃, obtains six water strontium chloride finished products.
Embodiment 3:
1, a certain amount of strontium slag is stirred and carries out pulp with addition of a certain amount of water, as the strontium slag of getting 1000g stirs pulp with addition of the water of 750g, be controlled at 1000g/L solid containing.
2, the strontium slag after adopting ball mill to pulp carries out ball milling, controls the granularity of ball milling at 130 orders, and the strontium slag after ball milling sieves, and the underproof strontium slag of granularity returns to continuation ball milling, and the strontium Zha Daoxiaxu workshop section of release mesh carries out press filtration.
3, adopt plate-and-frame filter press to carry out press filtration to levigate strontium slag, the filtrate that press filtration obtains is returned strontium slag is carried out to pulp, and the strontium slag that press filtration obtains enters dosing vessel by Belt Conveying and carries out stripping.
4, concentration is about to 30% hydrochloric acid and joins in dosing vessel stir stripping under normal pressure, controlling dissolution time is that 30min obtains strontium chloride slurries.
5, utilize the washing water configuration aqua calcis of tailings, the aqua calcis configuring is joined and in dosing vessel, neutralizes to remove the sulfite ion in solution, control the pH value of solution 7, in solution, free ion concentration of inferior sulfate radical is 0.15g/L.After neutralizing, obtain strontium chloride slurries.
6, adopt plate-and-frame filter press to strontium chloride slurries are carried out to liquid-solid separation, obtain the gravity flow of strontium chloride solution and enter strontium chloride solution tank, the tailings obtaining enters rinse bath by Belt Conveying.
7, the secondary vapour water of condensation of evaporation is sent into rinse bath tailings is carried out to agitator treating, adopt plate-and-frame filter press to tailings again press filtration to reclaim the strontium chloride in tailings attached liquid, obtain filtrate gravity flow and enter filtrate receiver configure aqua calcis, the tailings obtaining after press filtration by Automobile Transportation to stockyard.
8, adopt triple effect evaporation to evaporate strontium chloride solution, strontium chloride solution evaporation is carried out to crystallisation by cooling to sending into crystallisation by cooling groove after saturation concentration.
9, six water strontium chloride crystalloid solutions are carried out to suction filtration, obtain saturated strontium chloride solution and six water strontium chloride crystal, saturated strontium chloride solution returns and continues evaporation, and six water strontium chloride crystal by adopting hot water are dried, hot water temperature is 60 ℃, obtains six water strontium chloride finished products.
Claims (2)
1. six water strontium chloride preparation methods, is characterized in that, the mine tailing strontium slag that the lazurite of take is produced after Strontium carbonate powder is raw material, and preparation process comprises the following steps:
1) strontium slag is added to water stirring and carry out pulp, be controlled at 800g/L ~ 1000g/L solid the containing of pulp;
2) adopt wet-milling to add the mode of screening strontium sizing is thin, the granularity of wet-milling is controlled at 100 ~ 150 orders;
3) adopt the mode of press filtration to carry out press filtration to levigate strontium slag and bring the water in flow process into reduce strontium slag, the filtrate that press filtration obtains is returned strontium slag is carried out to pulp;
4) hydrochloric acid that is 25% ~ 30% by concentration joins in the strontium slag after press filtration and stir stripping under normal pressure, and the time of stirring stripping is 10min ~ 30min, obtains strontium chloride slurries;
5) in strontium chloride slurries, add aqua calcis to remove the sulfite ion in solution, control the pH value of solution 6 ~ 7, ion concentration of inferior sulfate radical free in solution is less than or equal to 0.2g/L;
6) adopt press filtration to strontium chloride slurries are carried out to liquid-solid separation, control press filtration strontium chloride solution out admittedly containing being less than or equal to 1g/L, obtain strontium chloride solution and tailings;
7) adopt the secondary vapour water of condensation of evaporation to wash press filtration again to reclaim the strontium chloride in tailings attached liquid to tailings, obtain the washing lotion of chloride containing strontium and clean tailings, washing lotion is returned to configuration aqua calcis;
8) strontium chloride solution is evaporated, then crystallisation by cooling obtains six water strontium chloride crystal, and the secondary vapour water of condensation of evaporation returns tailings is washed, and washing lotion is returned to configuration aqua calcis;
9) six water strontium chloride crystalloid solutions are carried out to suction filtration, obtain saturated strontium chloride solution and six water strontium chloride crystal, saturated strontium chloride solution returns and continues evaporation, and six water strontium chloride crystal are dried, dry temperature is less than or equal to 60 ℃, obtains six water strontium chloride finished products.
2. a kind of six water strontium chloride preparation methods according to claim 1, is characterized in that: the drying source in step 9) is hot water or warm air.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293554A (en) * | 2015-11-10 | 2016-02-03 | 青海民族大学 | Method for preparing high-purity strontium dihydroxide by utilizing strontium slag |
| CN105293555A (en) * | 2015-11-10 | 2016-02-03 | 青海民族大学 | Method for preparing high-purity strontium chloride by utilizing strontium slag |
| CN114182104A (en) * | 2021-10-28 | 2022-03-15 | 宁波弗镁瑞环保科技有限公司 | Method for recycling and comprehensively utilizing strontium slag |
Citations (4)
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|---|---|---|---|---|
| US4666688A (en) * | 1986-02-03 | 1987-05-19 | Excel-Mineral Company, Inc. | Method for recovery and conversion of strontium sulfate to strontium carbonate from low and medium grade celestite ores |
| CN101838006A (en) * | 2010-05-21 | 2010-09-22 | 中国科学院青海盐湖研究所 | Novel method for separating strontium carbonate waste slag acid leaching slurry |
| CN102092759A (en) * | 2009-12-09 | 2011-06-15 | 贵州红星发展股份有限公司 | Method for preparing strontium dichloride hexahydrate |
| CN102328947A (en) * | 2011-06-10 | 2012-01-25 | 贵州红星发展股份有限公司 | Method for recovering strontium slag |
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2013
- 2013-01-22 CN CN201310022478.XA patent/CN103936049B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4666688A (en) * | 1986-02-03 | 1987-05-19 | Excel-Mineral Company, Inc. | Method for recovery and conversion of strontium sulfate to strontium carbonate from low and medium grade celestite ores |
| CN102092759A (en) * | 2009-12-09 | 2011-06-15 | 贵州红星发展股份有限公司 | Method for preparing strontium dichloride hexahydrate |
| KR101190919B1 (en) * | 2009-12-09 | 2012-10-12 | 충칭 게창 테크놀로지 코포레이션 리미티드 | Method for Preparing Strontium Chloride Hexahydrate |
| CN101838006A (en) * | 2010-05-21 | 2010-09-22 | 中国科学院青海盐湖研究所 | Novel method for separating strontium carbonate waste slag acid leaching slurry |
| CN102328947A (en) * | 2011-06-10 | 2012-01-25 | 贵州红星发展股份有限公司 | Method for recovering strontium slag |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293554A (en) * | 2015-11-10 | 2016-02-03 | 青海民族大学 | Method for preparing high-purity strontium dihydroxide by utilizing strontium slag |
| CN105293555A (en) * | 2015-11-10 | 2016-02-03 | 青海民族大学 | Method for preparing high-purity strontium chloride by utilizing strontium slag |
| WO2017080244A1 (en) * | 2015-11-10 | 2017-05-18 | 严利容 | Method for preparing high-purity strontium chloride by using strontium slag |
| CN114182104A (en) * | 2021-10-28 | 2022-03-15 | 宁波弗镁瑞环保科技有限公司 | Method for recycling and comprehensively utilizing strontium slag |
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