CN101831561A - Method for decomposing potassium feldspar to extract soluble potassium - Google Patents
Method for decomposing potassium feldspar to extract soluble potassium Download PDFInfo
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- CN101831561A CN101831561A CN201010155877A CN201010155877A CN101831561A CN 101831561 A CN101831561 A CN 101831561A CN 201010155877 A CN201010155877 A CN 201010155877A CN 201010155877 A CN201010155877 A CN 201010155877A CN 101831561 A CN101831561 A CN 101831561A
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- potassium
- feldspar
- calcium chloride
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- potassium feldspar
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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
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a method for decomposing potassium feldspar to extract soluble potassium, comprising the following steps of: crushing and grinding potassium feldspar used as a raw material; mixing with the ground potassium feldspar, calcium chloride and sodium chloride which are used as a combined assistant, and fully stirring, wherein the ratio by mass part of the potassium feldspar to the calcium chloride to the sodium chloride is 10:(7-11):(1-6); roasting the mixture at the temperature of 750-900DEG C for 20-80 minutes; leaching the product with water; and evaporating, condensing and separating the filtered filtrate to obtain a potassium chloride product. The potassium chloride product can be used for producing potassic fertilizer; and main components of filter residue are anorthite and soda feldspar which can be used for producing cement, microcrystalline glass and other building materials. In the method, the selected assistant has low price and wide sources and the obtained potassium extract rate is high; in addition, the method is applicable for the production of extracting the potassium from the potassium feldspar.
Description
Technical field
The present invention relates to the comprehensive utilization of resources in fields such as mining industry, metallurgy, chemical industry and environmental protection, particularly a kind of method of decomposing potassium feldspar to extract soluble potassium.
Background technology
China is the very country of shortage of soluble potassium resource, develop that a kind of flow process is simple, less energy-consumption, high-recovery, the eco-friendly technology of extracting soluble potassium that potassium felspar sand is decomposed, be bottleneck and the difficult point that realizes utilizing the huge potassium felspar sand production potash fertilizer of reserves, and divide the selection of enzymolysis auxiliary agent and preparation particularly crucial.At present, hydrofluoric acid and sodium hydroxide all are effective auxiliary agents of decomposing of potassium feldspar, but corrodibility is too strong, and more expensive with respect to cost of material, and most inorganic salt are made auxiliary agent and then had the low and too high shortcoming of maturing temperature of rate of decomposition.
Find that by a large amount of auxiliary agent contrast experiment calcium chloride, sodium-chlor are ideal auxiliary agents comparatively, and cheap and easy to get.Utilize sodium-chlor to make auxiliary agent separately and extract the existing relevant report of soluble potassium (Zhao Ligang etc., 1997, sodium-chlor fused salt leaching method is carried potassium from potassium felspar sand) from potassium felspar sand, the total recovery of potassium is about 70%.But utilize calcium chloride to make also infiltration potassium feldspar to extract soluble potassium (Peng Qing waits quietly, 2003, the research of calcium chloride Extracting Potassium from Potash Feldspar Ores) of auxiliary agent separately, required maturing temperature is 870～960 ℃, and maturing temperature is higher, and roasting time is long, and energy consumption is big.
Summary of the invention
At the defective of prior art, the invention provides a kind of extraction yield that not only can improve soluble potassium, but also can suitably reduce maturing temperature and the method for the more friendly decomposing potassium feldspar to extract soluble potassium of environment.
The present invention conceives as follows:
Calcium chloride and sodium-chlor are carried potassium as auxiliary agent roasting decomposing of potassium feldspar after in a ratio proportioning that is fit to, not only can reduce maturing temperature, and can improve the rate of decomposition of potassium felspar sand, product after the roasting is through filtering, obtain the mixture that filter residue is mainly lime feldspar and albite, can be used to prepare material of construction such as cement, devitrified glass, filtrate can be separated with sodium-chlor excessive calcium chloride by evaporation, Crystallization Separation with product Repone K, calcium chloride and sodium-chlor recycle as auxiliary agent.
Purpose of the present invention is achieved through the following technical solutions.
A kind of method of decomposing potassium feldspar to extract soluble potassium is characterized in that, described method comprises the steps:
With potassium felspar sand fragmentation, grinding to 20～320 orders, in mass fraction, with 10 parts of feldspars in powder, 7～11 parts in calcium chloride (in Calcium Chloride Powder Anhydrous), 1～6 part of mixing and stirring of sodium-chlor, under 750～900 ℃ of conditions, roasting 20～80 minutes, the product water leaches, and filters promptly to obtain soluble potassium.
Beneficial effect
The obtained technical progress of the present invention is:
(1) adopt method of the present invention, under the same conditions, can obtain the extraction yield of higher soluble potassium, compare independent use calcium chloride or sodium-chlor and make auxiliary agent, the extraction yield of potassium can improve more than 10%, and high extraction is by the best proportioning decision of auxiliary agent.
(2) guaranteeing under the situation of high extraction, suitably reducing maturing temperature and shortened roasting time, reducing energy consumption.
(3) the auxiliary agent wide material sources of selecting for use, cheap, can obtain from calcined soda waste residue, waste liquid, reduce production costs.
(4) product after the roasting is through filtering, and filter residue can be used for preparing material of construction such as devitrified glass, cement, makes the potassium felspar sand resource obtain comprehensive utilization.
Embodiment
Feldspar in powder is milled to below 100 orders, and with calcium chloride, sodium-chlor mixing and stirring, roasting, the product water leaches, and filters and obtains soluble potassium.In embodiment 1～9, potassium felspar sand and calcium chloride, sodium-chlor blended proportioning, the parameter of calcining process and the extraction yield of soluble potassium see Table 1.
The proportioning of table 1 embodiment 1～9, parameter and result
In the following table 2,3 groups of auxiliary agent contrast and experiment are arranged, example the 1,4, the 7th, composite assistants embodiment, Comparative Examples 2,3, Comparative Examples 5,6, Comparative Examples 8,9 is put forward the result of potassium for using calcium chloride or sodium-chlor separately as the auxiliary agent decomposing of potassium feldspar, is respectively the contrast and experiment of the foregoing description 1,4,7, the same embodiment of production process that adopts, the extraction yield of concrete parameter and potassium is as shown in table 2:
Table 2 comparative test result
3 groups of auxiliary agent contrast and experiment that table 2 is listed are all used composite assistants and independent auxiliary agent to contrast, carry out the comparison of extraction yield under the conditions that the auxiliary dosage total mass equates, maturing temperature is all identical with the time for every group.
As can be seen from Table 2, adopt calcium chloride and sodium-chlor to make the composite assistants decomposing of potassium feldspar and carry potassium, the extraction yield of potassium obviously is greatly improved, thereby improves the level of resources utilization and economical efficiency, is a kind of more superior technology, is worthy of popularization.
Claims (1)
1. the method for a decomposing potassium feldspar to extract soluble potassium, it is characterized in that, described method comprises the steps: potassium felspar sand fragmentation, grinding to 20～320 orders, with feldspar in powder, calcium chloride, sodium-chlor mixing and stirring, in mass fraction, potassium felspar sand: calcium chloride: sodium-chlor=10: (7～11): (1～6), under 750～900 ℃ of conditions, roasting 20～80 minutes, the product water leaches, and filters promptly to obtain soluble potassium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010155877A CN101831561A (en) | 2010-04-23 | 2010-04-23 | Method for decomposing potassium feldspar to extract soluble potassium |
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| CN201010155877A CN101831561A (en) | 2010-04-23 | 2010-04-23 | Method for decomposing potassium feldspar to extract soluble potassium |
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| CN101831561A true CN101831561A (en) | 2010-09-15 |
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| CN201010155877A Pending CN101831561A (en) | 2010-04-23 | 2010-04-23 | Method for decomposing potassium feldspar to extract soluble potassium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391020A (en) * | 2011-08-24 | 2012-03-28 | 烟台大学 | Method for extracting soluble potassium from potassium feldspar |
| CN102531710A (en) * | 2010-12-08 | 2012-07-04 | 中国科学院过程工程研究所 | Method for producing potassium fertilizer and aluminum oxide by comprehensively using potassium feldspar |
| CN102617038A (en) * | 2012-03-27 | 2012-08-01 | 中国地质大学（武汉） | Method of using potassium feldspar ore as raw materials and directly sintering potassium feldspar ore to prepare glass ceramics |
| CN102701253A (en) * | 2012-06-08 | 2012-10-03 | 四川大学 | CO2 mineralization method capable of co-producing potassium-enriched solution by high temperature method |
| CN103183364A (en) * | 2013-04-28 | 2013-07-03 | 雷志刚 | Method for producing potassium chloride and co-producing calcium, magnesium, phosphorus and silicon composite fertilizer by potassium feldspar |
| CN103288102A (en) * | 2013-06-28 | 2013-09-11 | 天津水泥工业设计研究院有限公司 | Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer |
| CN103290234A (en) * | 2013-06-28 | 2013-09-11 | 天津水泥工业设计研究院有限公司 | Method for extracting soluble potassium by utilizing water-insoluble potassium ores |
Citations (3)
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|---|---|---|---|---|
| CN1133274A (en) * | 1995-04-13 | 1996-10-16 | 杨冬青 | Method of extracting potassium from potash feldspar |
| CN1261601A (en) * | 1999-11-19 | 2000-08-02 | 乔希海 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
| US20050220697A1 (en) * | 2004-03-30 | 2005-10-06 | Council Of Scientific And Industrial Research | Simultaneous recovery of potassium chloride and KCL enriched edible salt |
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2010
- 2010-04-23 CN CN201010155877A patent/CN101831561A/en active Pending
Patent Citations (3)
| 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 |
| CN1261601A (en) * | 1999-11-19 | 2000-08-02 | 乔希海 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
| US20050220697A1 (en) * | 2004-03-30 | 2005-10-06 | Council Of Scientific And Industrial Research | Simultaneous recovery of potassium chloride and KCL enriched edible salt |
Non-Patent Citations (1)
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| 《应用化学》 20030430 韩效钊等 离子交换法从钾长石提钾 373-375 1 第20卷, 第4期 2 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531710A (en) * | 2010-12-08 | 2012-07-04 | 中国科学院过程工程研究所 | Method for producing potassium fertilizer and aluminum oxide by comprehensively using potassium feldspar |
| CN102531710B (en) * | 2010-12-08 | 2014-09-24 | 中国科学院过程工程研究所 | Method for producing potassium fertilizer and aluminum oxide by comprehensively using potassium feldspar |
| CN102391020A (en) * | 2011-08-24 | 2012-03-28 | 烟台大学 | Method for extracting soluble potassium from potassium feldspar |
| CN102617038A (en) * | 2012-03-27 | 2012-08-01 | 中国地质大学（武汉） | Method of using potassium feldspar ore as raw materials and directly sintering potassium feldspar ore to prepare glass ceramics |
| CN102701253A (en) * | 2012-06-08 | 2012-10-03 | 四川大学 | CO2 mineralization method capable of co-producing potassium-enriched solution by high temperature method |
| CN102701253B (en) * | 2012-06-08 | 2014-05-14 | 四川大学 | CO2 mineralization method capable of co-producing potassium-enriched solution by high temperature method |
| CN103183364A (en) * | 2013-04-28 | 2013-07-03 | 雷志刚 | Method for producing potassium chloride and co-producing calcium, magnesium, phosphorus and silicon composite fertilizer by potassium feldspar |
| CN103183364B (en) * | 2013-04-28 | 2015-07-01 | 雷志刚 | Method for producing potassium chloride and co-producing calcium, magnesium, phosphorus and silicon composite fertilizer by potassium feldspar |
| CN103288102A (en) * | 2013-06-28 | 2013-09-11 | 天津水泥工业设计研究院有限公司 | Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer |
| CN103290234A (en) * | 2013-06-28 | 2013-09-11 | 天津水泥工业设计研究院有限公司 | Method for extracting soluble potassium by utilizing water-insoluble potassium ores |
| CN103288102B (en) * | 2013-06-28 | 2015-12-23 | 天津水泥工业设计研究院有限公司 | Method and the device of KCl production potash fertilizer are extracted in roasting water-insoluble potassium ore deposit |
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Open date: 20100915 |