CN110272299A - Coal ash for manufacturing for siliceous fertilizer method - Google Patents
Coal ash for manufacturing for siliceous fertilizer method Download PDFInfo
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- CN110272299A CN110272299A CN201810214549.9A CN201810214549A CN110272299A CN 110272299 A CN110272299 A CN 110272299A CN 201810214549 A CN201810214549 A CN 201810214549A CN 110272299 A CN110272299 A CN 110272299A
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- siliceous fertilizer
- dealuminzation
- activator
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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Abstract
The present invention relates to siliceous fertilizer field, a kind of coal ash for manufacturing is disclosed for the method for siliceous fertilizer and obtains liquor alumini chloridi and dealuminzation slag after filtering this method comprises: (1), which contacts flyash with hydrochloric acid solution, carries out dealuminzation pretreatment；(2) the dealuminzation slag is mixed with activator, fluxing agent, obtained mixture is roasted；Wherein, the activator is at least one of magnesite, calcium magnesium silicate, shepardite, lithium feldspar, lime stone, soda lime and ground phosphate rock, and the fluxing agent is at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium nitrate and powdered carbon.The siliceous fertilizer available silicon content of method preparation of the invention is high, and, maturing temperature can be reduced, reduce the energy consumption of roasting process, aluminium chloride can be prepared with coproduction, the approach of another high added value is opened for the comprehensive utilization of flyash, also provides a kind of new raw material and method for the production of siliceous fertilizer.
Description
Technical field
The present invention relates to siliceous fertilizer fields, and in particular to a kind of coal ash for manufacturing for siliceous fertilizer method.
Background technique
Silicon is a kind of necessary middle amount nutrient in process of crop growth, is to be classified as by international soil circle after nitrogen, phosphorus, potassium
The fourth-largest element later.Siliceous fertilizer is the novel and multifunctional fertilizer containing a kind of soluble silicon, it can improve the battalion of crops
Part is formed, the protein content of crop is turned up；Simultaneously siliceous fertilizer can demand according to crops in different phase to nutrient,
Balance absorption of the crops to elements such as nitrogen, phosphorus, potassium；Siliceous fertilizer also has the effect of diseases prevention, insect prevention concurrently, and it is anti-to significantly improve crops
The performances such as lodging, disease resistance, drought-resistant.In addition, siliceous fertilizer can be used as soil conditioner again, it can be effectively heavy metal-passivated, drop
Ill-effect of the poisonous and harmful element to crops in low soil, and soil alkali can be improved, improve soil environment, it has also become one
The efficient and high-quality fertilizer of kind green ecological agricultural.According to statistics, the soil that China lacks silicon accounts about 50% of cultivated area or so, and
And the cultivated area for lacking silicon is being gradually expanded, the especially scarce silicon of Yangtze river basin soil is serious, and it is reachable to lack tripoli earth ratio
70%.By taking rice as an example, the area of the long-term rice cultivation in China is up to more than 3,333 ten thousand hectares, if whole Applying silicon fertilizers, by volume increase
10% meter, only this item should can increase production 1,000,000 tons of paddy every year.Therefore, the production and application for promoting siliceous fertilizer have clearly
Social and economic benefit.
Currently, there are mainly two types of the methods of domestic production siliceous fertilizer: one kind is mixing method, directly by raw material and nitrogen, phosphorus, potash fertilizer
Mixing is crushed, and is granulated, siliceous fertilizer is made.The method simple production process, low energy consumption, but generally existing available silicon content increase is not
Obvious problem；Another method is chemical synthesis, and high-temperature roasting is carried out after raw material and cosolvent etc. are mixed, after cooling down,
It is levigate that siliceous fertilizer is made.Chemical synthesis can largely improve available silicon content in raw silicon, but preparation process is complicated, calcination time
Long, calcination temperature is high, higher so as to cause production cost.
CN90105832.7 mainly describes a kind of broken, mixing by the raw materials such as sandstone, lime stone, coal and mineralizer process
The techniques such as the molding of levigate plus water, calcining, broken prepare the method for making silicon fertilizer that the crops such as a kind of rice, sugarcane obtain high yield.Its
Calcination temperature is at 1100 DEG C -1450 DEG C, and calcination time is 0.5-10 hours, and product available silicon content is up to 35-40%.
CN01140782.4 mainly describes a kind of using generation during pre-processing liquid pig iron and with higher
The manufacturing method of the siliceous fertilizer of the clinker of soluble oxidation silicone content and this siliceous fertilizer.The method concrete operations are to add calcium oxide
Enter and oxygen is blown into liquid pig iron while adjusting basicity (CaO/SiO2) to 3 or lower, by liquid pig iron desiliconization and dephosphorization,
It is formed by slag collection, for manufacturing siliceous fertilizer.This siliceous fertilizer has the basicity (CaO/SiO no more than 32) and contain
15-35 weight % soluble silica.
It is soluble that CN200910012060.4 mainly describes the preparation of the raw materials such as bentonite, flyash, magnesia, aluminium oxide
The method of siliceous fertilizer.The method concrete operations are to mix flyash and sodium hydroxide solution, magnesia, aluminum oxide etc.
After ingredient, then with bentonite carry out mixing granulation, the Soluble silicon fertilizer of effective silicon > 20% can be prepared.
Summary of the invention
The purpose of the invention is to overcome drawbacks described above existing for existing siliceous fertilizer preparation method, a kind of flyash is provided
The method for preparing siliceous fertilizer.
To achieve the goals above, the present invention provides a kind of coal ash for manufacturing for the method for siliceous fertilizer, wherein this method comprises:
(1) flyash is contacted with hydrochloric acid solution and carries out dealuminzation pretreatment, liquor alumini chloridi and dealuminzation slag are obtained after filtering；
(2) the dealuminzation slag is mixed with activator, fluxing agent, obtained mixture is roasted；Wherein, the activator
For at least one of magnesite, calcium magnesium silicate, shepardite, lithium feldspar, lime stone, soda lime and ground phosphate rock, the fluxing agent
For at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium nitrate and powdered carbon.
The siliceous fertilizer available silicon content of method preparation of the invention is generally in 25-40 weight % or so, hence it is evident that is higher than current city
Siliceous fertilizer product (20 weight %) on field, compared with traditional chemical synthesis, the method can reduce maturing temperature, reduce
The energy consumption of roasting process reduces the production cost of siliceous fertilizer.Also, method of the invention can prepare aluminium chloride with coproduction, be
The comprehensive utilization of flyash opens the approach of another high added value, also for the production of siliceous fertilizer provide a kind of new raw material and
Method.
Specific embodiment
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
The present invention provides a kind of coal ash for manufacturing for the method for siliceous fertilizer, wherein this method comprises:
(1) flyash is contacted with hydrochloric acid solution and carries out dealuminzation pretreatment, liquor alumini chloridi and dealuminzation slag are obtained after filtering；
(2) the dealuminzation slag is mixed with activator, fluxing agent, obtained mixture is roasted；Wherein, the activator
For at least one of magnesite, calcium magnesium silicate, shepardite, lithium feldspar, lime stone, soda lime and ground phosphate rock, the fluxing agent
For at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium nitrate and powdered carbon.
In the present invention, the pretreated process of dealuminzation can make to be present in the Al that activity is strong in flyash2O3It is dissolved and comes out
Formation liquor alumini chloridi, and the SiO in flyash2It then all stays in residue, to realize aluminium in flyash, element silicon
Separation.
In the present invention, the concentration of the hydrochloric acid solution be preferably 10-30 weight % (for example, 10 weight %, 15 weight %,
20 weight %, 25 weight %, 30 weight %).
In the present invention, the dosage of the hydrochloric acid solution can be according to the Al in flyash2O3Content selected, as long as
It can be by the Al in flyash2O3It is dissolved out, it is preferable that the weight ratio of the dosage of the flyash and hydrochloric acid solution is
3-6:1 (for example, 3:1,4:1,5:1,6:1).
In the present invention, in order to reach better dealuminzation effect, it is preferable that the pretreated temperature of dealuminzation is 100-200
DEG C, the time is 2-4 hours.
A preferred embodiment of the invention, the method also includes: before carrying out step (2), by step
(1) the dealuminzation slag obtained is washed and is dried.
In the present invention, cleaning solution used in the washing can be water, can be carried out repeatedly with cleaning solution to the filter cake
Washing.The process of the drying can carry out in an oven, and the temperature of the drying can be 120-150, and the dry time can
Think 12-18 hours.
In the present invention, the activator is preferably at least one of magnesite, calcium magnesium silicate and shepardite, described to help
Flux is preferably at least one of sodium carbonate, sodium bicarbonate and potassium carbonate.
In the present invention, the dosage of the activator although can select in the larger context, in order to obtain effectively
The high siliceous fertilizer of silicone content, under preferable case, the weight ratio of the dosage of the dosage of the activator and the dealuminzation slag is 0.5-4:1
(for example, 0.5:1,0.8:1,1:1,1.5:1,1.8:1,2:1,2.5:1,2.8:1,3:1,3.5:1,3.8:1,4:1), further
Preferably 0.8-2:1 (for example, 0.8:1,1:1,1.5:1,1.8:1,2:1).
In the present invention, it is preferable that the partial size of the activator is 100 mesh or less." partial size be 100 mesh or less " herein be
Referring to can be by the partial size of the sieve pore greater than 100 mesh.
In the present invention, the dosage of the fluxing agent although can select in the larger context, in order to obtain effectively
The high siliceous fertilizer of silicone content, under preferable case, the weight ratio of the dosage of the dosage of the fluxing agent and the dealuminzation slag is 0.2-1:1
(for example, 0.2:1,0.3:1,0.4:1,0.5:1,0.6:1,0.7:1,0.8:1,0.9:1,1:1), further preferably 0.2-
0.5:1 (for example, 0.2:1,0.3:1,0.4:1,0.5:1).
In the present invention, the condition of the roasting is preferably included: temperature is 600-1000 DEG C (for example, 600 DEG C, 650 DEG C, 700
DEG C, 750 DEG C, 800 DEG C, 850 DEG C, 900 DEG C, 950 DEG C, 1000 DEG C), preferably 600-800 DEG C (for example, 600 DEG C, 610 DEG C, 620
℃、630℃、640℃、650℃、660℃、670℃、680℃、690℃、700℃、710℃、720℃、730℃、740℃、
750 DEG C, 760 DEG C, 770 DEG C, 780 DEG C, 790 DEG C, 800 DEG C), further preferably 600-700 DEG C (for example, 600 DEG C, 610 DEG C,
620 DEG C, 630 DEG C, 640 DEG C, 650 DEG C, 660 DEG C, 670 DEG C, 680 DEG C, 690 DEG C, 700 DEG C), the time of roasting is 1-4 hours (examples
Such as, 1 hour, 2 hours, 3 hours, 4 hours).
According to another preferred method of implementation of the present invention, the heating rate of the roasting process is 5-10 DEG C/min (example
Such as, 5 DEG C/min, 5.5 DEG C/min, 6 DEG C/min, 6.5 DEG C/min, 7 DEG C/min, 7.5 DEG C/min, 8 DEG C/min, 8.5 DEG C/min, 9
℃/min、9.5℃/min、10℃/min、)。
In the present invention, utilized to improve raw material resourcesization, the method can also include: the chlorine for obtaining step (1)
Change aluminum solutions and carries out industrial abstract alumina treatment.The method of the industrial abstract aluminium oxide can be existing molten with aluminium chloride
Liquid is the method that raw material extracts aluminium oxide, for example, specifically referring to the method may include techniques such as crystallization, roastings
CN107285351A, this will not be detailed here.
The present invention will be described in detail by way of examples below.In following embodiment,
Flyash comes from company, Inner Mongolia Zhungeer Guo Hua power plant；
Available silicon content in siliceous fertilizer is tested according to Ministry of Agriculture's NY/T797-2004 standard: weigh the above-mentioned siliceous fertilizer of 1g with
150mL, 20g/L citric acid solution are added in sample bottle, and sample bottle is put into reciprocating oscillator and is vibrated, the time
80min, oscillation rate 150r/min, takes out after vibrating 80min and filters immediately, collects filtrate, the titanium dioxide in filtrates tested
Silicone content.
Embodiment 1
Configuration quality score is 15% hydrochloric acid solution 400ml first, is added after evenly mixing with 100g flyash
In reaction kettle, temperature is set as 150 DEG C, the reaction time 2 hours, to after reaction, by temperature in the kettle be reduced to 100 DEG C with
Under, mixed solution is taken out, is filtered immediately, filtrate is liquor alumini chloridi, and filter cake continues to carry out with 1000ml water multiple
Washing, the filter cake after washing are put into baking oven and are dried, and temperature is 120 DEG C, and drying time is 12 hours.Take 50g filter cake, 10g
Sodium bicarbonate, 50g shepardite (wherein shepardite is purchased from Shandong You Suo Chemical Industry Science Co., Ltd, and partial size is 325 mesh) are uniformly mixed
Be put into crucible after conjunction, be then placed in Muffle furnace and roasted, maturing temperature be set as 1000 DEG C (heating rate be 10 DEG C/
Min), 50 DEG C of taking-ups are down to temperature after reaction in calcining time 1 hour.As siliceous fertilizer.According to Ministry of Agriculture NY/T797-
2004 standards carry out the effective silico analysis of siliceous fertilizer, and by test, this siliceous fertilizer available silicon content is 40 weight %, meet NY/T797-
2004 requirement (available silicon content is greater than 20 weight %).
Embodiment 2
Configuration quality score is 20% hydrochloric acid solution 500ml first, is added after evenly mixing with 100g flyash
In reaction kettle, temperature is set as 100 DEG C, the reaction time 4 hours, to after reaction, by temperature in the kettle be reduced to 100 DEG C with
Under, mixed solution is taken out, is filtered immediately, filtrate is liquor alumini chloridi, and filter cake continues to carry out with 1000ml water multiple
Washing, the filter cake after washing are put into baking oven and are dried, and temperature is 150 DEG C, and drying time is 15 hours.Take 50g filter cake, 15g
Sodium carbonate, 40g calcium magnesium silicate (partial size is 400 mesh), is put into crucible after evenly mixing, is then placed in Muffle furnace and is roasted,
Maturing temperature is set as 600 DEG C (heating rate is 5 DEG C/min), calcining time 2 hours, after reaction, is down to 50 to temperature
DEG C take out.As siliceous fertilizer.The effective silico analysis of siliceous fertilizer is carried out according to Ministry of Agriculture's NY/T797-2004 standard, by test, this siliceous fertilizer
Available silicon content is 30 weight %, meets the requirement of NY/T797-2004.
Embodiment 3
Configuration quality score is 30% hydrochloric acid solution 300ml first, is added after evenly mixing with 100g flyash
In reaction kettle, temperature is set as 200 DEG C, the reaction time 3 hours, to after reaction, by temperature in the kettle be reduced to 100 DEG C with
Under, mixed solution is taken out, is filtered immediately, filtrate is liquor alumini chloridi, and filter cake continues to carry out with 1000ml water multiple
Washing, the filter cake after washing are put into baking oven and are dried, and temperature is 130 DEG C, and drying time is 18 hours.Take 50g filter cake, 25g
Potassium carbonate, 100g magnesite (purchased from Haicheng City sincere fine mesh mountain flour factory, partial size is 0-5 millimeters) are put into earthenware after evenly mixing
Crucible is then placed in Muffle furnace and is roasted, and maturing temperature is set as 800 DEG C (heating rate is 8 DEG C/min), calcining time 4
Hour, after reaction, 50 DEG C of taking-ups are down to temperature.As siliceous fertilizer.Silicon is carried out according to Ministry of Agriculture's NY/T797-2004 standard
The effective silico analysis of fertilizer, by test, this siliceous fertilizer available silicon content is 35 weight %, meets the requirement of NY/T797-2004.
Embodiment 4
Siliceous fertilizer is prepared according to the method for embodiment 1, unlike, shepardite is replaced using the soda lime of identical weight.Through
Test is crossed, obtained siliceous fertilizer available silicon content is 25 weight %.
Embodiment 5
Siliceous fertilizer is prepared according to the method for embodiment 1, unlike, it is (beautiful purchased from Fengcheng City using the lithium feldspar of identical weight
Huashan mining industry Co., Ltd, partial size is by 200 mesh) replace shepardite.By test, obtained siliceous fertilizer available silicon content is 26 weights
Measure %.
Embodiment 6
Siliceous fertilizer is prepared according to the method for embodiment 1, unlike, it is replaced using the mixture of 5g sodium hydroxide and 5g carbon dust
Sodium bicarbonate.By test, obtained siliceous fertilizer available silicon content is 26 weight %.
Embodiment 7
Siliceous fertilizer is prepared according to the method for embodiment 1, unlike, the heating rate of the roasting process is 12 DEG C/min.
By test, obtained siliceous fertilizer available silicon content is 28 weight %.
Comparative example 1
Siliceous fertilizer is prepared according to the method for embodiment 1, unlike, sodium bicarbonate (that is, without fluxing agent) is not added.By surveying
Examination, obtained siliceous fertilizer available silicon content are 16 weight %, do not meet the requirement of NY/T797-2004.
Comparative example 2
Siliceous fertilizer is prepared according to the method for embodiment 1, unlike, shepardite (that is, without activator) is not added.By surveying
Examination, obtained siliceous fertilizer available silicon content are 3 weight %, do not meet the requirement of NY/T797-2004.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (10)
1. a kind of coal ash for manufacturing is for the method for siliceous fertilizer, which is characterized in that this method comprises:
(1) flyash is contacted with hydrochloric acid solution and carries out dealuminzation pretreatment, liquor alumini chloridi and dealuminzation slag are obtained after filtering；
(2) the dealuminzation slag is mixed with activator, fluxing agent, obtained mixture is roasted；Wherein, the activator is water chestnut
At least one of magnesite, calcium magnesium silicate, shepardite, lithium feldspar, lime stone, soda lime and ground phosphate rock, the fluxing agent are hydrogen
At least one of sodium oxide molybdena, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium nitrate and powdered carbon.
2. according to the method described in claim 1, wherein, the activator be in magnesite, calcium magnesium silicate and shepardite extremely
Few one kind, the fluxing agent are at least one of sodium carbonate, sodium bicarbonate and potassium carbonate.
3. method according to claim 1 or 2, wherein the weight of the dosage of the activator and the dosage of the dealuminzation slag
Amount is than being 0.5-4:1, preferably 0.8-2:1.
4. method according to claim 1 or 2, wherein the partial size of the activator is 100 mesh or less.
5. method according to claim 1 or 2, wherein the weight of the dosage of the fluxing agent and the dosage of the dealuminzation slag
Amount is than being 0.2-1:1, preferably 0.2-0.5:1.
6. method according to claim 1 or 2, wherein the condition of the roasting includes: that temperature is 600-1000 DEG C, roasting
The time of burning is 1-4 hours.
7. method according to claim 1 or 2, wherein the heating rate of the roasting process is 5-10 DEG C/min.
8. according to the method described in claim 1, wherein, the concentration of the hydrochloric acid solution is 10-30 weight %；
Preferably, the weight ratio of the dosage of the flyash and hydrochloric acid solution is 3-6:1；
Preferably, the pretreated temperature of the dealuminzation is 100-200 DEG C, and the time is 2-4 hours.
9. method according to claim 1 or 8, wherein the method also includes: before carrying out step (2), by step
(1) the dealuminzation slag obtained is washed and is dried.
10. method according to claim 1 or 8, wherein the method also includes: the aluminium chloride that step (1) is obtained is molten
Liquid carries out industrial abstract alumina treatment.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111018573A (en) * | 2019-12-24 | 2020-04-17 | 江阴硕人节能环保科技有限公司 | Silicon fertilizer and production process thereof |
| CN111943730A (en) * | 2020-07-14 | 2020-11-17 | 卢建军 | Preparation process of high-doped fly ash potassium-rich silicon fertilizer |
| CN112430171A (en) * | 2020-12-11 | 2021-03-02 | 山东农业大学 | Method for improving acidified soil by using gasified slag and acidified soil conditioner |
| CN113045341A (en) * | 2019-12-26 | 2021-06-29 | 国家能源投资集团有限责任公司 | Method for preparing alkali-free silicon fertilizer from silicon-containing acid treatment solution and alkali-free silicon fertilizer |
| CN113277886A (en) * | 2021-05-27 | 2021-08-20 | 厦门大学嘉庚学院 | Silicon fertilizer for tea trees and composite silicon fertilizer for tea trees using same |
| CN113321230A (en) * | 2020-02-28 | 2021-08-31 | 国家能源投资集团有限责任公司 | Method for preparing aluminum oxide and silicon fertilizer by using fly ash |
| CN114057513A (en) * | 2020-08-03 | 2022-02-18 | 北京低碳清洁能源研究院 | Granular silicon-containing compound fertilizer and preparation method thereof |
| CN114478083A (en) * | 2022-02-17 | 2022-05-13 | 兴安盟博源化学有限公司 | Method for preparing silicon fertilizer from coarse slag of gasification furnace |
| CN115073228A (en) * | 2021-03-12 | 2022-09-20 | 国家能源投资集团有限责任公司 | Silicon fertilizer and preparation method thereof |
| CN115124379A (en) * | 2021-03-24 | 2022-09-30 | 国家能源投资集团有限责任公司 | Granular citrate soluble silicon fertilizer and its preparation method |
| CN115611684A (en) * | 2022-10-31 | 2023-01-17 | 陕西科技大学 | Method for preparing silicon fertilizer by using gasified slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111018573A (en) * | 2019-12-24 | 2020-04-17 | 江阴硕人节能环保科技有限公司 | Silicon fertilizer and production process thereof |
| CN113045341A (en) * | 2019-12-26 | 2021-06-29 | 国家能源投资集团有限责任公司 | Method for preparing alkali-free silicon fertilizer from silicon-containing acid treatment solution and alkali-free silicon fertilizer |
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| CN114057513A (en) * | 2020-08-03 | 2022-02-18 | 北京低碳清洁能源研究院 | Granular silicon-containing compound fertilizer and preparation method thereof |
| CN112430171A (en) * | 2020-12-11 | 2021-03-02 | 山东农业大学 | Method for improving acidified soil by using gasified slag and acidified soil conditioner |
| CN115073228A (en) * | 2021-03-12 | 2022-09-20 | 国家能源投资集团有限责任公司 | Silicon fertilizer and preparation method thereof |
| CN115073228B (en) * | 2021-03-12 | 2024-04-02 | 国家能源投资集团有限责任公司 | Silicon fertilizer and preparation method thereof |
| CN115124379A (en) * | 2021-03-24 | 2022-09-30 | 国家能源投资集团有限责任公司 | Granular citrate soluble silicon fertilizer and its preparation method |
| CN113277886A (en) * | 2021-05-27 | 2021-08-20 | 厦门大学嘉庚学院 | Silicon fertilizer for tea trees and composite silicon fertilizer for tea trees using same |
| CN113277886B (en) * | 2021-05-27 | 2022-06-21 | 厦门大学嘉庚学院 | Silicon fertilizer for tea trees and composite silicon fertilizer for tea trees using silicon fertilizer |
| CN114478083A (en) * | 2022-02-17 | 2022-05-13 | 兴安盟博源化学有限公司 | Method for preparing silicon fertilizer from coarse slag of gasification furnace |
| CN115611684A (en) * | 2022-10-31 | 2023-01-17 | 陕西科技大学 | Method for preparing silicon fertilizer by using gasified slag |
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