CN103937976A - Method used for preparing dissoluble potassium via decomposition desilication of potash feldspar - Google Patents
Method used for preparing dissoluble potassium via decomposition desilication of potash feldspar Download PDFInfo
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- CN103937976A CN103937976A CN201410065930.5A CN201410065930A CN103937976A CN 103937976 A CN103937976 A CN 103937976A CN 201410065930 A CN201410065930 A CN 201410065930A CN 103937976 A CN103937976 A CN 103937976A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a method used for preparing dissoluble potassium via decomposition desilication of potash feldspar. The method comprises following steps: (1) potash feldspar is subjected to ore grinding so as to reduce fineness to -50 to -400 meshes; (2) potash feldspar powder obtained via step (1) is uniformly mixed with a silicon precipitation reagent, and a strong base solution at a mass ratio of 1:0.1-3:0.2-4; (3) a mixture obtained via step (2) is subjected to hydrothermal reaction in a reaction pot, wherein reaction temperature ranges from 100 to 300 DEG C, pressure ranges from 0.1 to 6Mpa, and reaction time ranges from 1 to 24h; and (4) a material obtained via step (3) is subjected to solid-liquid separation so as to obtain dissoluble potassium. Process flow of the method is simple; decomposition temperature is low; roasting time is short; energy consumption is low; production cost is low; economic benefits are excellent; decomposition mother liquor can be used as a raw material for subsequent potassium extraction; the reagents are widely available; cost is low; and environmental pollution is less.
Description
Technical field
The present invention relates to a kind of technique of low-temperature decomposing of potassium feldspar, especially relate to a kind of technique of hydro-thermal alkaline process low-temperature decomposing of potassium feldspar.
Background technology
China's sylvite ore natural resources shortage, but potassium felspar sand aboundresources is widely distributed, reserves are large, and potassium content is higher, are generally greater than 10%(in potassium oxide), be to fully utilize the more satisfactory raw material of producing sylvite.Potash feldspar ore is Si-Al-O frame shape structure, and its molecular formula is K[AlSi
3o
8], its composition is reticulated structure, extremely stable, under normal temperature and pressure, is decomposed hardly by acid, alkali, therefore, the exploitation of potassium felspar sand are restricted.
Decomposing of potassium feldspar is the prerequisite and key that potassium felspar sand develops, and how water-insoluble potassium is changed into the major subjects that soluble potassium resource is this area research.At present, more classical decomposing of potassium feldspar method is high-temperature calcination, and the method energy consumption is high, although by adding auxiliary agent, can reduce temperature, but seldom have lower than 800 ℃.Another kind of decomposition method is fluorine-containing system decomposition method, utilize the severe corrosive decomposing of potassium feldspar of hydrofluoric acid, but the method auxiliary agent consumption is large, and equipment material requires high, and environmental protection pressure is huge simultaneously.
At present, have and adopt alkali lye as decomposing raw material, the research of decomposing of potassium feldspar at a lower temperature, as the employing potassium felspar sands such as the Liu Wei of University Of Yantai and alkali carry out low temperature (105 ~ 380 ℃) hydro-thermal reaction by a certain percentage, by alkali, destroy the crystalline network of potassium felspar sand inside, indissoluble sylvite is separated out.But in reaction, silicon also can be by alkali stripping, so the follow-up silica removal process of reaction needed complexity, and technical process is longer.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiency of existing decomposing of potassium feldspar technique, provides a kind of potassium felspar sand to decompose the technique that solvable potassium is produced in desiliconization, when adopting decomposing of potassium feldspar of the present invention, silicon is deposited in solid phase, obtains purer soluble potassium.
The technical scheme that the present invention solves its technical problem employing is that a kind of potassium felspar sand decomposes the technique that solvable potassium is produced in desiliconization, comprises the following steps:
(1) by ore grinding, make its fineness be down to-50 ~-400 orders (preferably-100 ~-150 orders) potassium felspar sand;
(2) by step (1) gained feldspar in powder and heavy silica reagent, strong base solution in mass ratio heavy Gui Shi Ji ︰ strong base solution=1 ︰ 0.1 ~ 3 ︰ 0.2 ~ 4 of potassic feldspar Fen ︰ mix;
Described heavy silica reagent is CaCl
2, Ca (NO
3)
2, CaO or these compounds the solution of 5wt% ~ 60wt%;
The mass concentration of described strong base solution is preferably 10% ~ 60%;
Described strong base solution is preferably sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution or solution of potassium carbonate;
(3) step (2) gained mixture is carried out to hydro-thermal reaction in retort, described hydrothermal reaction condition is: temperature of reaction is 100 ℃ ~ 300 ℃ (preferably 200 ~ 250 ℃), pressure is the preferred 2MPa ~ 4MPa of 0.1MPa ~ 6MPa(), the reaction times is the preferred 4h ~ 8h of 1h ~ 24h();
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The invention has the beneficial effects as follows: (1) technical process is simple, and decomposition temperature is lower, and roasting time is short, and energy consumption is low, and production cost is low, good in economic efficiency; (2) decomposition nut liquid can be as the follow-up potassium raw material of carrying; (3) selected reagent source is extensive, cheap, and environmental pollution is little.
The present invention utilizes silicate ion and calcium binding to generate the principle of the precipitated calcium silicate of indissoluble, and silicon is deposited in reacted slag, can obtain forming simple soluble potassium mother liquor, has greatly simplified follow-up Potassium process, has great actual application value.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-100 orders;
(2) by step (1) gained feldspar in powder and CaCl
2the NaOH solution that powder, concentration are 10wt% in mass ratio 1:0.2:1 mixes;
(3) step (2) gained mixture is heated to 300 ℃ in retort and carries out hydro-thermal reaction, pressure is 6MPa, and the reaction times is 4h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
In the present embodiment, Potassium leaching rate is 95wt%, and silicon solubility rate is 3wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 2
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-100 orders;
(2) by step (1) gained feldspar in powder and CaCl
2the NaOH solution that powder, concentration are 40wt% in mass ratio 1:0.4:1 mixes;
(3) step (2) gained mixture is heated to 200 ℃ in retort and carries out hydro-thermal reaction, pressure is 4MPa, and the reaction times is 4h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
In the present embodiment, Potassium leaching rate is 94wt%, and silicon solubility rate is 0.5wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 3
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-100 orders
(2) milk of lime that is 40wt% by step (1) gained feldspar in powder with concentration, the NaOH solution that concentration is 40wt% in mass ratio 1:0.4:1 mix;
(3) step (2) gained mixture is heated to 100 ℃ in retort and carries out hydro-thermal reaction, pressure is 4MPa, and the reaction times is 8h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
In the present embodiment, Potassium leaching rate is 89wt%, and silicon solubility rate is 0.5wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 4
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-100 orders;
(2) by step (1) gained feldspar in powder and Ca (NO
3)
2the NaOH solution that powder, mass concentration are 40% in mass ratio 1:0.5:1 mixes;
(3) step (2) gained mixture is heated to 300 ℃ in retort and carries out hydro-thermal reaction, pressure is 6MPa, and the reaction times is 4h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The present embodiment Potassium leaching rate is 95wt%, and silicon solubility rate is 0.1wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 5
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-50 orders;
(2) by step (1) gained feldspar in powder and Ca (NO
3)
2the NaOH solution that powder, mass concentration are 40% in mass ratio 1:1:0.2 mixes;
(3) step (2) gained mixture is heated to 250 ℃ in retort and carries out hydro-thermal reaction, pressure is 2MPa, and the reaction times is 1h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The present embodiment Potassium leaching rate is 90wt%, and silicon solubility rate is 0.1wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 6
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-200 orders;
(2) Ca (NO that is 50% by step (1) gained feldspar in powder and mass concentration
3)
2the potassium hydroxide solution that solution, mass concentration are 60% in mass ratio 1:2:0.5 mixes;
(3) step (2) gained mixture is heated to 150 ℃ in retort and carries out hydro-thermal reaction, pressure is 1MPa, and the reaction times is 1h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The present embodiment Potassium leaching rate is 91wt%, and silicon solubility rate is 0.2wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 7
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-300 orders;
(2) CaCl that is 5% by step (1) gained feldspar in powder and mass concentration
2the solution of potassium carbonate that solution, mass concentration are 40% in mass ratio 1:3:2 mixes;
(3) step (2) gained mixture is heated to 280 ℃ in retort and carries out hydro-thermal reaction, pressure is 0.5MPa, and the reaction times is 2h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The present embodiment Potassium leaching rate is 92wt%, and silicon solubility rate is 0.3wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 8
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-400 orders;
(2) Ca (NO that is 30% by step (1) gained feldspar in powder and mass concentration
3)
2the sodium carbonate solution that solution, mass concentration are 10% in mass ratio 1:2:3 mixes;
(3) step (2) gained mixture is heated to 180 ℃ in retort and carries out hydro-thermal reaction, pressure is 0.1MPa, and the reaction times is 16h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The present embodiment Potassium leaching rate is 93wt%, and silicon solubility rate is 0.2wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Embodiment 9
The present embodiment comprises the following steps:
(1) potassium felspar sand is levigate to-400 orders;
(2) by step (1) gained feldspar in powder and Ca (NO
3)
2the NaOH solution that powder, mass concentration are 40% in mass ratio 1:1:4 mixes;
(3) step (2) gained mixture is heated to 300 ℃ in retort and carries out hydro-thermal reaction, pressure is 0.2MPa, and the reaction times is 24h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
The present embodiment Potassium leaching rate is 94wt%, and silicon solubility rate is 0.1wt%, and the solubility rate of potassium is high, and silicon stripping is less.
Claims (5)
1. potassium felspar sand decomposes the technique that solvable potassium is produced in desiliconization, it is characterized in that, comprises the following steps:
(1) by ore grinding, make its fineness be down to-50 ~-400 orders potassium felspar sand;
(2) by step (1) gained feldspar in powder and heavy silica reagent, strong base solution in mass ratio heavy Gui Shi Ji ︰ strong base solution=1 ︰ 0.1 ~ 3 ︰ 0.2 ~ 4 of potassic feldspar Fen ︰ mix;
Described heavy silica reagent is CaCl
2, Ca (NO
3)
2, CaO or these salt 5% ~ 60% solution;
(3) step (2) gained mixture is carried out to hydro-thermal reaction in retort, described hydrothermal reaction condition is: temperature of reaction is 100 ℃ ~ 300 ℃, and pressure is 0.1MPa ~ 6MPa, and the reaction times is 1h ~ 24h;
(4) will, through the reacted material solid-liquid separation of step (3), obtain soluble potassium solution.
2. potassium felspar sand according to claim 1 decomposes the technique that solvable potassium is produced in desiliconization, it is characterized in that, in step (1), makes its fineness be down to-100 ~-150 orders potassium felspar sand by ore grinding.
3. potassium felspar sand according to claim 1 and 2 decomposes the technique that solvable potassium is produced in desiliconization, it is characterized in that, in step (2), the mass concentration of described strong base solution is 10% ~ 60%.
4. potassium felspar sand according to claim 1 and 2 decomposes the technique that solvable potassium is produced in desiliconization, it is characterized in that, in step (2), described strong base solution is sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution or solution of potassium carbonate.
5. potassium felspar sand according to claim 1 and 2 decomposes the technique that solvable potassium is produced in desiliconization, it is characterized in that, in step (3), described hydrothermal reaction condition is: temperature of reaction is 200 ~ 250 ℃, and pressure is 2MPa ~ 4MPa, and the reaction times is 4h ~ 8h.
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| CN201410065930.5A CN103937976A (en) | 2014-02-26 | 2014-02-26 | Method used for preparing dissoluble potassium via decomposition desilication of potash feldspar |
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| CN201410065930.5A CN103937976A (en) | 2014-02-26 | 2014-02-26 | Method used for preparing dissoluble potassium via decomposition desilication of potash feldspar |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104760977A (en) * | 2015-04-01 | 2015-07-08 | 化工部长沙设计研究院 | Method for separating and extracting potassium chloride crude product from solid potassic salt ore heavy-liquid |
| CN106702139A (en) * | 2015-07-28 | 2017-05-24 | 中国科学院过程工程研究所 | Method for extracting sylvite from non-water-soluble potassium-containing rock |
| CN108238832A (en) * | 2016-12-26 | 2018-07-03 | 中国科学院过程工程研究所 | A kind of method that alkali activation potassium feldspar prepares soluble potassium and calcium silicates soil conditioner |
| CN108862343A (en) * | 2018-08-16 | 2018-11-23 | 东北大学 | A method of comprehensive utilization potash feldspar ore |
| CN110330975A (en) * | 2019-07-25 | 2019-10-15 | 深圳前海大地矿物科技有限公司 | A kind of preparation method and soil conditioner of soil conditioner |
| CN113121334A (en) * | 2020-01-15 | 2021-07-16 | 中蓝长化工程科技有限公司 | Method for producing potassium oxalate and aluminum hydroxide by using potassium feldspar |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133274A (en) * | 1995-04-13 | 1996-10-16 | 杨冬青 | Method of extracting potassium from potash feldspar |
| CN1508092A (en) * | 2002-12-19 | 2004-06-30 | 中国科学院地质与地球物理研究所 | Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction |
| CN101450874A (en) * | 2007-11-30 | 2009-06-10 | 中国地质大学（北京） | Method for producing agricultural mineral base potassium nitrate by using potassium-rich rock |
| CN102408256A (en) * | 2011-08-24 | 2012-04-11 | 烟台大学 | Method for quickly extracting soluble potassium at low temperature |
| WO2013061092A1 (en) * | 2011-10-27 | 2013-05-02 | Verde Potash Plc | Potash product and method |
-
2014
- 2014-02-26 CN CN201410065930.5A patent/CN103937976A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133274A (en) * | 1995-04-13 | 1996-10-16 | 杨冬青 | Method of extracting potassium from potash feldspar |
| CN1508092A (en) * | 2002-12-19 | 2004-06-30 | 中国科学院地质与地球物理研究所 | Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction |
| CN101450874A (en) * | 2007-11-30 | 2009-06-10 | 中国地质大学（北京） | Method for producing agricultural mineral base potassium nitrate by using potassium-rich rock |
| CN102408256A (en) * | 2011-08-24 | 2012-04-11 | 烟台大学 | Method for quickly extracting soluble potassium at low temperature |
| WO2013061092A1 (en) * | 2011-10-27 | 2013-05-02 | Verde Potash Plc | Potash product and method |
Non-Patent Citations (2)
| Title |
|---|
| 程辉等: "低温水相碱溶分解钾长石工艺的优化", 《ＩＭ＆Ｐ化工矿物与加工》 * |
| 郑云霞等: "钾长石-氧化钙-氢氧化钾体系提钾工艺研究", 《磷肥与复肥》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104760977A (en) * | 2015-04-01 | 2015-07-08 | 化工部长沙设计研究院 | Method for separating and extracting potassium chloride crude product from solid potassic salt ore heavy-liquid |
| CN104760977B (en) * | 2015-04-01 | 2016-10-12 | 化工部长沙设计研究院 | A kind of method of the solid potassium salt ore deposit heavy-fluid thick product of separation and Extraction potassium chloride |
| CN106702139A (en) * | 2015-07-28 | 2017-05-24 | 中国科学院过程工程研究所 | Method for extracting sylvite from non-water-soluble potassium-containing rock |
| CN106702139B (en) * | 2015-07-28 | 2018-05-22 | 中国科学院过程工程研究所 | A kind of method that sylvite is extracted from water-insoluble potassium bearing rock |
| CN108238832A (en) * | 2016-12-26 | 2018-07-03 | 中国科学院过程工程研究所 | A kind of method that alkali activation potassium feldspar prepares soluble potassium and calcium silicates soil conditioner |
| CN108238832B (en) * | 2016-12-26 | 2021-06-01 | 中国科学院过程工程研究所 | Method for preparing soluble potassium and calcium silicate soil conditioner by alkali-activated potassium feldspar |
| CN108862343A (en) * | 2018-08-16 | 2018-11-23 | 东北大学 | A method of comprehensive utilization potash feldspar ore |
| CN110330975A (en) * | 2019-07-25 | 2019-10-15 | 深圳前海大地矿物科技有限公司 | A kind of preparation method and soil conditioner of soil conditioner |
| CN113121334A (en) * | 2020-01-15 | 2021-07-16 | 中蓝长化工程科技有限公司 | Method for producing potassium oxalate and aluminum hydroxide by using potassium feldspar |
| CN113121334B (en) * | 2020-01-15 | 2022-05-20 | 中蓝长化工程科技有限公司 | Method for producing potassium oxalate and aluminum hydroxide by using potassium feldspar |
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