CN110436967A - A kind of silicon-calcium-potafertilizer fertilizer and preparation method thereof using the production of low grade potassium feldspar - Google Patents
A kind of silicon-calcium-potafertilizer fertilizer and preparation method thereof using the production of low grade potassium feldspar Download PDFInfo
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- CN110436967A CN110436967A CN201910832567.8A CN201910832567A CN110436967A CN 110436967 A CN110436967 A CN 110436967A CN 201910832567 A CN201910832567 A CN 201910832567A CN 110436967 A CN110436967 A CN 110436967A
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
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- C05D1/04—Fertilisers containing potassium from minerals or volcanic rocks
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Abstract
The present invention relates to potassium feldspars to produce silicon-calcium-potafertilizer fertilizer technology, in particular to a kind of silicon-calcium-potafertilizer fertilizer and preparation method thereof using the production of low grade potassium feldspar.The raw material of production silicon-calcium-potafertilizer fertilizer includes low grade potassium feldspar and lime stone, and low grade potassium feldspar and lime stone are matched with controlling sintered product interphase Ca/Si molar ratio as 0.8~1.2.The preparation method of above-mentioned silicon-calcium-potafertilizer fertilizer includes the following steps: that low grade potassium feldspar and lime stone is added by the quality proportioning calculated first and is uniformly mixed, mixture is finally obtained into silicon-calcium-potafertilizer fertilizer sequentially by broken, grinding, calcined by rotary kiln, cooler are cooling, broken and grinding again；The present invention can efficiently use the widely distributed low grade potassium feldspar ore in China, by scientific ingredients, control sintered product interphase Ca/Si molar ratio, guarantee higher potassium conversion ratio, control Na2O content, while avoiding generating the hydraulicitys products such as dicalcium silicate.
Description
Technical field
The invention belongs to potassium feldspars to produce silicon-calcium-potafertilizer fertilizer technology, in particular to a kind of silicon produced using low grade potassium feldspar
Calcium potash fertilizer and preparation method thereof.
Background technique
China's water-soluble potassium scarcity of resources, is unable to satisfy Potassium Fertilizer required for agricultural production, needs from external import.
Potassium feldspar is as domestic the most abundant water-insoluble potassium resource, if can develop and use, will largely to alleviate China's potassium resource short
Scarce problem.Due to the potassium in potassium feldspar be it is non-water-soluble, can hardly directly be absorbed by plant, how will be water-insoluble
Potassium is converted to the effective potassium that can be absorbed by plants, and is the key content of the area research.
General K2The potassium feldspar of O content > 9.0% is just able to satisfy industrial utilization requirement, and industrial circle is called high-grade potassium
Feldspar.The current main technique using potassium feldspar production silicon-calcium-potafertilizer fertilizer has calcination method, hydro-thermal method etc., and what is mainly utilized is high-grade
Potassium feldspar.China's potassium feldspar mineral resource distribution is extensive, but due to geological structure etc., the potassium feldspar in many areas in south
Mine grade is lower, K2O content≤9.0%, industrial utility value is lower, causes the serious waste of mineral resources.Low grade potassium is long
The characteristics of stone, is that potassium is low, sodium is high, silicon is high, if simple using conventional high-grade potassium mine ingredient and production method, not only potassium
Transformation efficiency is low, low for the potassium content of crop utilization；And it is easy to generate high sodium (Na2O content > 2.0%) fertilizer, it may
The soil salinization is aggravated, and is possible to have a negative impact to plant growth；It is also easy to because of improper generation dicalcium silicate of ingredient etc.
Hydraulicity product makes soil generate phenomena such as hardening, is hardened after fertilising.
Therefore, how science, efficiently utilize low grade potassium feldspar resource abundant, have important practical significance.
Summary of the invention
The present invention is to solve technical problem present in well-known technique and provide and a kind of produced using low grade potassium feldspar
Silicon-calcium-potafertilizer fertilizer and preparation method thereof can efficiently use the widely distributed low grade potassium feldspar ore in China, pass through scientific ingredients, control
Sintered product interphase Ca/Si molar ratio processed guarantees higher potassium conversion ratio, controls Na2O content, while avoiding generating silicon
The hydraulicitys product such as sour dicalcium.
To achieve the goals above, of the present invention the specific technical proposal is:
A kind of silicon-calcium-potafertilizer fertilizer produced using low grade potassium feldspar, the raw material for making silicon-calcium-potafertilizer fertilizer includes low grade potassium feldspar
And lime stone, low grade potassium feldspar and lime stone are matched with controlling sintered product interphase Ca/Si molar ratio as 0.8~1.2
Than.
Further, the silicon-calcium-potafertilizer fertilizer preparation method, sintered product interphase Ca/Si molar ratio is defined as: calcined
Cheng Zhong, sintered product is with nepheline [KNa3(AlSiO4)4], kaliophilite (KAlSiO4), cacoclasite (Ca2Al2SiO7), white pomegranate
Stone (KAlSi2O6), jadeite (NaAlSi2O6) etc. after Mineral content computations, residual ionization CaO and SiO2Molar ratio.
Further, K in the low grade potassium feldspar2O content is 5.0%~9.0%, Na2O content≤3.5%.
Further, the quality proportioning of the low grade potassium feldspar and the lime stone is (55~45): (45~55).
Further, in the silicon-calcium-potafertilizer fertilizer finished product effective potassium (with K2O meter) mass content be 3.5%~5.2%, potassium conversion ratio
> 83%；Effective sodium is (with Na2O meter) mass content < 2%.
Further, the preparation method of above-mentioned silicon-calcium-potafertilizer fertilizer includes the following steps: to add by the quality proportioning calculated first
Enter low grade potassium feldspar and lime stone and be uniformly mixed, then by mixture sequentially by broken, grinding, calcined by rotary kiln, cooling
Machine is cooling, broken and grinding, finally obtains silicon-calcium-potafertilizer fertilizer；Wherein, in calcined by rotary kiln process burning zone temperature be 1200~
1350 DEG C, material is 20~60 minutes in kiln residence time；Cooler is cooled to+65 DEG C of environment temperature hereinafter, raw material and fertilizer
The material equal grinding of finished product is tailed over less than 10% to 80 μm.
Advantages of the present invention and good effect are as follows:
1, the present invention can efficiently use China and divide extensively by preparing silicon-calcium-potafertilizer fertilizer by raw material of low grade potassium feldspar ore
The low grade potassium feldspar ore of cloth increases the range of raw material selection, increases range for the addressing in raw material mining area；And reduce
To the dependence of potassium resource import, reduce costs；
2, method of the present invention by preparing silicon-calcium-potafertilizer fertilizer as raw material using low grade potassium feldspar ore, is matched by scientific and reasonable
Material, guarantees higher potassium conversion ratio, while can control Na2O content avoids generating the hydraulicitys products such as dicalcium silicate, guarantees
The safety of fertilizer finished product.
Specific embodiment
Firstly, it is necessary to which explanation, illustrates preparation method of the invention, feature and excellent for by way of example below
Point etc., however what all descriptions were intended merely to be illustrated, and should not be construed as to present invention formation any restrictions.This
Outside, any single technical characteristic for being described by or implying in each embodiment mentioned by this paper, still can be in these technologies spy
Continue any combination between sign (or its equivalent) or delete, to obtain this hair that may do not referred to directly herein
Bright more other embodiments.
The invention discloses a kind of silicon-calcium-potafertilizer fertilizers produced using low grade potassium feldspar, and the raw material of the silicon-calcium-potafertilizer fertilizer includes low
Grade potassium feldspar and lime stone；K in the low grade potassium feldspar2O mass content is 5.0%~9.0%；Na2O mass content≤
3.5%.The stoichiometric calculation method of low grade potassium feldspar and lime stone are as follows: sintered product is long with nepheline, kaliophilite, calcium aluminium Huang
After the objects such as stone, leucite, jadeite mutually calculate, residual ionization CaO and SiO2Molar ratio, i.e. sintered product interphase Ca/Si
Molar ratio is 0.8~1.2；Preferably, sintered product interphase Ca/Si molar ratio preferably 0.9~1.1.
The invention also discloses the preparation methods of above-mentioned silicon-calcium-potafertilizer fertilizer, include the following steps:
Low grade potassium feldspar and lime stone is added by the quality proportioning that calculates first and is uniformly mixed, then by mixture according to
Sequence finally obtains silicon-calcium-potafertilizer fertilizer by broken, grinding, calcined by rotary kiln, cooler are cooling, broken and grinding；Wherein, rotary kiln
Burning zone temperature is 1200~1350 DEG C in calcination process, and material is 30~60 minutes in kiln residence time；Cooler is cooling
To+65 DEG C of environment temperature hereinafter, raw material and the equal grinding of fertilizer finished product are tailed over less than 10% to 80 μm.
The present invention is illustrated the preparation method of silicon-calcium-potafertilizer fertilizer by three embodiments:
Embodiment 1:
K in potassium feldspar2O content=8.96%, Na2O content=2.59%.
During stoichiometric calculates, sintered product is mutually calculated with objects such as nepheline, kaliophilite, cacoclasite, leucite, jadeites
Afterwards, residual ionization CaO and SiO2Molar ratio, i.e. molar ratio=0.8 sintered product interphase Ca/Si obtains potassium feldspar and stone
The mass percent of lime stone is 55:45.
It is proportionally added into 550kg low grade potassium feldspar and 450kg lime stone and is uniformly mixed in batch mixer, it is raw material, ripe
Expect that each composition quality content is as shown in table 1:
Each composition quality content (%) in 1 potassium feldspar of table and lime stone mixture
| L.O.I | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | K2O | Na2O | Total | |
| Raw material | 19.62 | 40.31 | 8.09 | 0.24 | 23.91 | 0.79 | 5.00 | 1.43 | 99.39 |
| Clinker | / | 50.15 | 10.06 | 0.30 | 29.75 | 0.99 | 6.22 | 1.78 | 99.25 |
By mixture sequentially by broken, grinding, calcined by rotary kiln, cooler are cooling, broken and grinding, silico-calcium potassium is obtained
Fertilizer.Wherein, burning zone temperature is 1250~1300 DEG C in calcined by rotary kiln process, and material is 40~60 points in kiln residence time
Clock；Cooler is cooled to+65 DEG C of environment temperature hereinafter, raw material and the equal grinding of fertilizer finished product are tailed over less than 10% to 80 μm.It is above-mentioned
The broken process equipment crusher mature using existing application, powder-grinding process equipment use existing ball mill or roll squeezer
Or corresponding mature equipment, details are not described herein again.
Silicon-calcium-potafertilizer fertilizer finished product is subjected to effective substance according to agriculture ministerial standard NY/T 2273, can be absorbed by plants
Effective potassium is (with K2O meter) mass content=5.2%, potassium conversion ratio is 83%, meanwhile, the effective sodium that can be absorbed by plants is (with Na2O
Meter) mass content=1.4%, meet Fertilizer application requirement.
Silicon-calcium-potafertilizer fertilizer finished product is subjected to XRD detection, main object is mutually leucite, kaliophilite, nepheline, cacoclasite, β-
Wollastonite, without to the harmful ingredient of soil.
Embodiment 2:
K in potassium feldspar2O content=6.58%, Na2O content=3.5%.
During stoichiometric calculates, sintered product is mutually calculated with objects such as nepheline, kaliophilite, cacoclasite, leucite, jadeites
Afterwards, residual ionization CaO and SiO2Molar ratio, i.e. molar ratio=1.2 sintered product interphase Ca/Si obtain potassium feldspar and stone
The mass percent of lime stone is 45.5:54.5.
It is proportionally added into 455kg low grade potassium feldspar and 545kg lime stone and is uniformly mixed in batch mixer, it is raw material, ripe
Expect that each composition quality content is as shown in table 2:
Each composition quality content (%) in 2 potassium feldspar of table and lime stone mixture
| L.O.I | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | K2O | Na2O | Total | |
| Raw material | 24.05 | 32.45 | 7.98 | 0.34 | 28.92 | 0.91 | 3.08 | 1.60 | 99.34 |
| Clinker | / | 42.72 | 10.51 | 0.45 | 38.08 | 1.20 | 4.06 | 2.10 | 99.13 |
By mixture sequentially by broken, grinding, calcined by rotary kiln, cooler are cooling, broken and grinding, silico-calcium potassium is obtained
Fertilizer.Wherein, burning zone temperature is 1230~1280 DEG C in calcined by rotary kiln process, and material is 30~50 points in kiln residence time
Clock；Cooler is cooled to+65 DEG C of environment temperature, and raw material and the equal grinding of fertilizer finished product are tailed over less than 10% to 80 μm；
Silicon-calcium-potafertilizer fertilizer finished product is subjected to effective substance according to agriculture ministerial standard NY/T 2273, can be absorbed by plants
Effective potassium is (with K2O meter) mass content=3.6%, potassium conversion ratio is 88%, meanwhile, the effective sodium that can be absorbed by plants is (with Na2O
Meter) mass content=1.7%, meet Fertilizer application requirement.
Silicon-calcium-potafertilizer fertilizer finished product is subjected to XRD detection, main object is mutually kaliophilite, nepheline, cacoclasite, α-wollastonite,
Without to the harmful ingredient of soil.
Embodiment 3:
K in potassium feldspar2O content=6.58%, Na2O content=3.5%.
During stoichiometric calculates, sintered product is mutually calculated with objects such as nepheline, kaliophilite, cacoclasite, leucite, jadeites
Afterwards, residual ionization CaO and SiO2Molar ratio, i.e. molar ratio=1.0 sintered product interphase Ca/Si obtain potassium feldspar and stone
The mass percent of lime stone is 49.41:50.59.
It is proportionally added into 494.1kg low grade potassium feldspar and 505.9kg lime stone and is uniformly mixed in batch mixer, it is raw
Material, each composition quality content of clinker are as shown in table 3:
Each composition quality content (%) in 3 potassium feldspar of table and lime stone mixture
| L.O.I | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | K2O | Na2O | Total | |
| Raw material | 22.42 | 35.15 | 8.61 | 0.35 | 26.86 | 0.86 | 3.33 | 1.73 | 99.32 |
| Clinker | / | 45.31 | 11.09 | 0.46 | 34.62 | 1.11 | 4.30 | 2.24 | 99.12 |
By mixture sequentially by broken, grinding, calcined by rotary kiln, cooler are cooling, broken and grinding, silico-calcium potassium is obtained
Fertilizer.Wherein, burning zone temperature is 1230~1280 DEG C in calcined by rotary kiln process, and material is 30~50 points in kiln residence time
Clock；Cooler is cooled to+65 DEG C of environment temperature hereinafter, raw material and the equal grinding of fertilizer finished product are tailed over less than 10% to 80 μm.
Silicon-calcium-potafertilizer fertilizer finished product is subjected to effective substance according to agriculture ministerial standard NY/T 2273, can be absorbed by plants
Effective potassium is (with K2O meter) mass content=4.2%, potassium conversion ratio up to 97%, meanwhile, the effective sodium that can be absorbed by plants is (with Na2O
Meter) mass content=1.9%, meet Fertilizer application requirement.
Silicon-calcium-potafertilizer fertilizer finished product is subjected to XRD detection, main object is mutually kaliophilite, nepheline, cacoclasite, β-wollastonite,
Without to the harmful ingredient of soil.
In summary example is directed to the low grade potassium feldspar for having the characteristics that potassium is low, sodium is high, silicon is high, is matched by science
Material, it is ensured that higher potassium conversion ratio (> 83%), control Na2O content (< 2%)；By controlling sintered product interphase
Ca/Si molar ratio controls free CaO and SiO in reaction mass in 0.8~1.2 range2Ratio, control Na2O content,
It is possible to prevente effectively from the generation of the hydraulicitys product such as dicalcium silicate, ensure that the safety of fertilizer finished product.
The present invention is suitable for low grade potassium feldspar simultaneously and lime stone, low grade potassium feldspar and dolomite, low grade potassium are long
Stone and lime stone and dolomite ingredient, prepare the mines such as siliceous fertilizer, calcium silicate fertilizer, silicon-calcium-potafertilizer fertilizer, silico-calcium potassic-magnesian fertilizer, potash-lime fertilizer, potassium silicon fertilizer
Object fertilizer and its derived product.
Above embodiments describe the invention in detail, but content is only the preferred embodiment of the present invention, no
It can be believed to be used to limit the scope of the invention.Any changes and modifications in accordance with the scope of the present application,
It should still fall within the scope of the patent of the present invention.
Claims (6)
1. a kind of silicon-calcium-potafertilizer fertilizer produced using low grade potassium feldspar, it is characterised in that: it includes low for making the raw material of silicon-calcium-potafertilizer fertilizer
Grade potassium feldspar and lime stone, low grade potassium feldspar and lime stone with control sintered product interphase Ca/Si molar ratio be 0.8~
1.2 are matched.
2. utilizing the preparation method of low grade potassium feldspar production silicon-calcium-potafertilizer fertilizer as described in claim 1, which is characterized in that sintering
Product interphase Ca/Si molar ratio is defined as: in calcination process, sintered product is with nepheline, kaliophilite, cacoclasite, white pomegranate
After the Mineral content computations such as stone, jadeite, residual ionization CaO and SiO2Molar ratio.
3. utilizing the silicon-calcium-potafertilizer fertilizer of low grade potassium feldspar production as described in claim 1, it is characterised in that: the low grade potassium
K in feldspar2O content is 5.0%~9.0%, Na2O content≤3.5%.
4. utilizing the silicon-calcium-potafertilizer fertilizer of low grade potassium feldspar production as described in claim 1, it is characterised in that: the low grade potassium
The quality proportioning of feldspar and the lime stone is (55~45): (45~55).
5. as claimed in claim 4 using low grade potassium feldspar production silicon-calcium-potafertilizer fertilizer, it is characterised in that: the silicon-calcium-potafertilizer fertilizer at
Effective potassium is (with K in product2O meter) mass content be 3.5%~5.2%, potassium conversion ratio > 83%；Effective sodium is (with Na2O meter) quality
Content < 2%.
6. a kind of preparation method of such as silicon-calcium-potafertilizer fertilizer described in any one of claim 1 to 5, which is characterized in that including walking as follows
It is rapid: low grade potassium feldspar and lime stone is added by the quality proportioning calculated first and is uniformly mixed, then mixture is sequentially passed through
It crosses that broken, grinding, calcined by rotary kiln, cooler are cooling, broken and grinding, finally obtains silicon-calcium-potafertilizer fertilizer；Wherein, calcined by rotary kiln
Burning zone temperature is 1200~1350 DEG C in process, and material is 20~60 minutes in kiln residence time；Cooler is cooled to ring
+ 65 DEG C of border temperature is hereinafter, raw material and the equal grinding of fertilizer finished product are tailed over less than 10% to 80 μm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213792A (en) * | 2021-04-22 | 2021-08-06 | 辽宁工程技术大学 | Preparation method of hydraulic lime |
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| CN1084842A (en) * | 1992-09-28 | 1994-04-06 | 贵州大学 | A kind of novel method of producing potash-lime fertilizer |
| CN101544518A (en) * | 2009-05-11 | 2009-09-30 | 贵州西洋肥业有限公司 | Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum |
| CN102557050A (en) * | 2011-12-20 | 2012-07-11 | 昆明冶金研究院 | New process for comprehensively utilizing potassium feldspar |
| CN103739341A (en) * | 2014-01-14 | 2014-04-23 | 天津水泥工业设计研究院有限公司 | Production process and equipment of silicon-calcium-potassium fertilizer |
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2019
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084842A (en) * | 1992-09-28 | 1994-04-06 | 贵州大学 | A kind of novel method of producing potash-lime fertilizer |
| CN101544518A (en) * | 2009-05-11 | 2009-09-30 | 贵州西洋肥业有限公司 | Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum |
| CN102557050A (en) * | 2011-12-20 | 2012-07-11 | 昆明冶金研究院 | New process for comprehensively utilizing potassium feldspar |
| CN103739341A (en) * | 2014-01-14 | 2014-04-23 | 天津水泥工业设计研究院有限公司 | Production process and equipment of silicon-calcium-potassium fertilizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213792A (en) * | 2021-04-22 | 2021-08-06 | 辽宁工程技术大学 | Preparation method of hydraulic lime |
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