CN107628840A - A kind of method for preparing potassic-magnesian fertilizer - Google Patents
A kind of method for preparing potassic-magnesian fertilizer Download PDFInfo
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- CN107628840A CN107628840A CN201711058534.XA CN201711058534A CN107628840A CN 107628840 A CN107628840 A CN 107628840A CN 201711058534 A CN201711058534 A CN 201711058534A CN 107628840 A CN107628840 A CN 107628840A
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- potassic
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- potassium
- polyhalite
- feldspar
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Abstract
The invention discloses a kind of method for preparing potassic-magnesian fertilizer, using polyhalite and potassium feldspar as raw material, is ground into powder, is supplemented crystallization magnesium chloride, by roasting, water logging, filtering and evaporation, potassic-magnesian fertilizer is prepared.Advantage is the present invention compared with prior art：First, the present invention use polyhalite, potassium feldspar raw material is easy to get, cost is low, the phosphate-containing ore for making full use of China to be widely present, substitutes from bittern for raw material, solves the short technical barrier of China's agricultural potassium resource.2nd, potassium, the magnesium elements in raw material are made full use of, further supplement magnesium elements with reference to additional crystallization magnesium chloride, the potassic-magnesian fertilizer of production provides potassium and magnesium elements needed for crop growth, and fertilizer efficiency is good.3rd, preparation method is simple, and production requirement is low, and production cost is low, use easy to spread.
Description
Technical field
The present invention relates to a kind of preparation method of fertilizer, and in particular to a kind of method that potassic-magnesian fertilizer is prepared using ore.
Background technology
Polyhalite is a kind of refractory potassic mine, is widely distributed in sulfate type potassium ore deposit, its theoretical potassium content（K2O）Reach
15.6%, it is a kind of important potential Potash mineral resources.World's polyhalite stock number very abundant, studies the utilization of polyhalite
Technology, for alleviating world's Potash mineral resources situation, improve Potash Industry present situation, improving strategic resource deposit has great meaning
Justice.
It is water-soluble poor due to the Stability Analysis of Structures of polyhalite, certain processing ability dissolution potassium therein and magnesium need to be passed through,
Contain K+And Mg2+Solution more be used to prepare potassium sulfate or potassic-magnesian fertilizer, had some document reports using polyhalite preparation
The method of potassium sulfate or potassic-magnesian fertilizer, although K+Utilization rate is high, but economic benefit is poor.
Therefore the potassium feldspar reserves in China, are highly valued compared with horn of plenty by waste potash fertilizer of potassium feldspar.From
The research using Potassic Fertilizer Production from Potash Feldspar has been begun within 1958, tens of kinds of processes have successively been tested, such as vaporization at high temperature method, height
Warm fusion method, sintering process, hydro-thermal method and low-temperature decomposition method, potash-lime fertilizer, fused calcium magnesium phosphorus potash fertilizer, silicon-magnesium potash fertilizer, flue ash potash, chlorine is made
Change the products such as potassium, potassium sulfate, but in addition to flue ash potash once had small-scale, the short time industrial production, other methods are due to technology
Or economically the reason for, fails to obtain commercial Application.
The rock-steady structure for being critical that potassium feldspar of extracting potassium from potash feldspar technology changes, and makes potassium dissolution in water.It is economical
Cost, equipment corrosion, flow direct motion and product quality are the key problems for needing to solve.
Potassium element is element necessary to plant growth again, and plant lacks potassium element, is usually expressed as leaf jaundice etc..And
China salt lake soluble potassium brick and tile clay can not meet the needs of planting industry, and 75% or so potash fertilizer relies on import.Therefore, grind
Study carefully and how using the polyhalite and potassium feldspar of rich reserves to prepare potassic-magnesian fertilizer, be to solve the short pass of China's agricultural potassium resource
Key.
The content of the invention
It is an object of the invention to provide a kind of method that potassic-magnesian fertilizer is prepared using ore, alleviates China's agricultural potassium resource
The problem of short.
Technical scheme is as follows：
A kind of method for preparing potassic-magnesian fertilizer, comprises the following steps：
（1）Stock：Polyhalite, potassium feldspar are broken into 3-5mm particle respectively, 100 mesh sieves was then crushed to respectively again, and obtained
To polyhalite powder and feldspar in powder；
（2）Roasting：Polyhalite powder is calcined 1-3h under an inert atmosphere, obtains sintered powder 1, crystallization is added into feldspar in powder
Magnesium chloride, 2-5h is calcined under vacuum, obtain sintered powder 2；
（3）Leaching：Sintered powder 1 and sintered powder 2 are mixed, then water logging 1-3h, are stirred or shake while water logging；
（4）Filtering：Material after leaching is filtered, obtains leaching liquid and filter cake, filter cake deionized water rinsing 2-3 times,
Wash water is mixed into leaching liquid；
（6）Evaporation：Heating evaporation is carried out to leaching liquid, it is 85-95 DEG C to control evaporating temperature, treats water content for material gross mass
During 8-12%, stop heating, obtain potassic-magnesian fertilizer.
Preferably, step（1）The mass ratio of middle polyhalite and potassium feldspar is 3-5:1.
Preferably, step（2）In sintering temperature be 300-600 DEG C.
Preferably, step（2）In, the mol ratio according to Mg in K in feldspar in powder and crystallization magnesium chloride is 1:1-3 is mixed
Close, roasting.
Advantage is the present invention compared with prior art：First, the present invention uses polyhalite, potassium feldspar raw material is easy for raw material
, cost it is low, the phosphate-containing ore for making full use of China to be widely present, substitute from bittern, it is short to solve China's agricultural potassium resource
Scarce technical barrier.2nd, potassium, the magnesium elements in raw material are made full use of, magnesium member is further supplemented with reference to additional crystallization magnesium chloride
Element, the potassic-magnesian fertilizer of production provide potassium and magnesium elements needed for crop growth, and fertilizer efficiency is good.3rd, preparation method is simple, production requirement
Low, production cost is low, use easy to spread.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
This specification（Including any accessory claim, summary）Disclosed in any feature, unless specifically stated otherwise,
Replaced by other equivalent or with similar purpose alternative features.I.e., unless specifically stated otherwise, each feature is a series of
An example in equivalent or similar characteristics.
Embodiment 1
A kind of method for preparing potassic-magnesian fertilizer, comprises the following steps：
（1）Stock：30kg polyhalites, 10kg potassium feldspars are broken into 3mm particle respectively, were then crushed to 100 respectively again
Mesh sieve, obtain polyhalite powder and feldspar in powder；
（2）Roasting：Polyhalite powder is calcined 3h in 300 DEG C under an inert atmosphere, sintered powder 1 is obtained, adds into feldspar in powder
Enter crystallization magnesium chloride, the mol ratio for controlling K and Mg in crystallization magnesium chloride in feldspar in powder is 1:1, under vacuum in 300 DEG C
2h is calcined, obtains sintered powder 2；
（3）Leaching：Sintered powder 1 and sintered powder 2 are mixed, then water logging 3h, are stirred while water logging；
（4）Filtering：Material after leaching is filtered, obtains leaching liquid and filter cake, filter cake deionized water rinsing 3 times, is washed
Water is mixed into leaching liquid；
（6）Evaporation：Heating evaporation is carried out to leaching liquid, it is 85 DEG C to control evaporating temperature, treats water content for the 12% of material gross mass
When, stop heating, obtain potassic-magnesian fertilizer.
Embodiment 2
A kind of method for preparing potassic-magnesian fertilizer, comprises the following steps：
（1）Stock：500kg polyhalites, 100kg potassium feldspars are broken into 5mm particle respectively, were then crushed to respectively again
100 mesh sieves, obtain polyhalite powder and feldspar in powder；
（2）Roasting：Polyhalite powder is calcined 1h in 600 DEG C under an inert atmosphere, sintered powder 1 is obtained, adds into feldspar in powder
Enter crystallization magnesium chloride, the mol ratio for controlling K and Mg in crystallization magnesium chloride in feldspar in powder is 1:3, under vacuum in 600 DEG C
4h is calcined, obtains sintered powder 2；
（3）Leaching：Sintered powder 1 and sintered powder 2 are mixed, then water logging 1h, shaken while water logging；
（4）Filtering：Material after leaching is filtered, obtains leaching liquid and filter cake, filter cake deionized water rinsing 2 times, is washed
Water is mixed into leaching liquid；
（6）Evaporation：Heating evaporation is carried out to leaching liquid, it is 95 DEG C to control evaporating temperature, treats water content for the 8% of material gross mass
When, stop heating, obtain potassic-magnesian fertilizer.
Claims (4)
- A kind of 1. method for preparing potassic-magnesian fertilizer, it is characterised in that comprise the following steps：（1）Stock：Polyhalite, potassium feldspar are broken into 3-5mm particle respectively, 100 mesh sieves was then crushed to respectively again, and obtained To polyhalite powder and feldspar in powder；（2）Roasting：Polyhalite powder is calcined 1-3h under an inert atmosphere, obtains sintered powder 1, crystallization is added into feldspar in powder Magnesium chloride, 2-5h is calcined under vacuum, obtain sintered powder 2；（3）Leaching：Sintered powder 1 and sintered powder 2 are mixed, then water logging 1-3h, are stirred or shake while water logging；（4）Filtering：Material after leaching is filtered, obtains leaching liquid and filter cake, filter cake deionized water rinsing 2-3 times, Wash water is mixed into leaching liquid；（6）Evaporation：Heating evaporation is carried out to leaching liquid, it is 85-95 DEG C to control evaporating temperature, treats water content for material gross mass During 8-12%, stop heating, obtain potassic-magnesian fertilizer.
- A kind of 2. method for preparing potassic-magnesian fertilizer according to claim 1, it is characterised in that step（1）Middle polyhalite and potassium The mass ratio of feldspar is 3-5:1.
- A kind of 3. method for preparing potassic-magnesian fertilizer according to claim 1, it is characterised in that step（2）In sintering temperature For 300-600 DEG C.
- A kind of 4. method for preparing potassic-magnesian fertilizer according to claim 1, it is characterised in that step（2）In, according to potassium feldspar K and Mg in crystallization magnesium chloride mol ratio is 1 in powder:1-3 is mixed, is calcined.
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| CN201711058534.XA CN107628840A (en) | 2017-11-01 | 2017-11-01 | A kind of method for preparing potassic-magnesian fertilizer |
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| CN201711058534.XA CN107628840A (en) | 2017-11-01 | 2017-11-01 | A kind of method for preparing potassic-magnesian fertilizer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1680217A (en) * | 2004-04-05 | 2005-10-12 | 河南省东辰钾肥工程技术研究中心 | Production of potassium and magnesium fertilizer |
| CN102391020A (en) * | 2011-08-24 | 2012-03-28 | 烟台大学 | Method for extracting soluble potassium from potassium feldspar |
| CN106380233A (en) * | 2016-08-29 | 2017-02-08 | 化工部长沙设计研究院 | Process for preparing potassic-magnesian fertilizer by using polyhalite |
| CN106810320A (en) * | 2017-01-17 | 2017-06-09 | 华南农业大学 | Application and manufacture method of the activator in terms of cooling calcining manufacture activation potash fertilizer |
-
2017
- 2017-11-01 CN CN201711058534.XA patent/CN107628840A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1680217A (en) * | 2004-04-05 | 2005-10-12 | 河南省东辰钾肥工程技术研究中心 | Production of potassium and magnesium fertilizer |
| CN102391020A (en) * | 2011-08-24 | 2012-03-28 | 烟台大学 | Method for extracting soluble potassium from potassium feldspar |
| CN106380233A (en) * | 2016-08-29 | 2017-02-08 | 化工部长沙设计研究院 | Process for preparing potassic-magnesian fertilizer by using polyhalite |
| CN106810320A (en) * | 2017-01-17 | 2017-06-09 | 华南农业大学 | Application and manufacture method of the activator in terms of cooling calcining manufacture activation potash fertilizer |
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