CN106747680A - The preparation method of active element selenium and its selenium fertilizer in a kind of alkaline process active coal gangue - Google Patents
The preparation method of active element selenium and its selenium fertilizer in a kind of alkaline process active coal gangue Download PDFInfo
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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
- C05D9/02—Other inorganic fertilisers containing trace elements
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
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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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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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Abstract
The invention discloses active element selenium in a kind of alkaline process active coal gangue and its preparation method of selenium fertilizer, it is raw material to use gangue of the Se content in the range of 90 170mg/Kg of bestowing favour, and pulverizes coal gangue and crosses 100 200 eye mesh screens and obtain the micron powder that particle diameter is 71 154 μm；Ball milling obtains the nanometer grade powder of the 150nm scopes of particle diameter 60 after being dried under the conditions of 50 DEG C 60 DEG C；The sodium carbonate liquor that mass fraction is 6 40% is prepared, by 1:The solid-liquid ratio of (6 30) mixes nanometer grade powder and sodium carbonate liquor, activated 14 hours under normal temperature/heating/microwave environment, room temperature is cooled to after the completion of activation, nano-scale coal gangue solid selenium fertilizer is obtained, can be directly manured into soil base fertilizer, thing sorption enhanced output selenium-rich organic food is made for, also inorganic organic composite selenic fertilizer or multielement functionality gangue selenium fertilizer can be re-dubbed as base-material；Safe preparation process of the present invention environmental protection, low production cost, selenium activation rate are high, effectively increase the bioavilability of selenium, and realization is bestowed favour the recycling of gangue.
Description
Technical field
The present invention relates to chemical industry and agricultural fertilizer technical field, in specifically a kind of alkaline process active coal gangue active element selenium and its
The preparation method of selenium fertilizer, it is adaptable to the resource of organic selenium fertilizer, compound selenium fertilizer, the production of Biological Selenium fertilizer and selenium-rich gangue abandoned mine
Develop.
Background technology
Recent studies have proven to human life activity must nutritional trace element selenium there is cancer-resisting, anti-oxidant, gas defence
Removing toxic substances preventing from heavy metal pollution, antimicrobial antiphlogistic disease, anti-hypertension, protection and repair cell, anti-aging and hypoglycemic, raising are immune
The extensive biological function such as power and pharmacological action, are described as " long-lived element " and " king of anticancer " both at home and abroad；Selenium and kind more than 40
Common disease has directly or indirectly relation, American scientist, it has been proposed that 21 century selenium will turn into anticancer and prevention of various diseases
One of Main Means, China's selenium has been written into junior three chemical textbook and national higher medical education teaching material《It is micro- with it is strong
Health》；But selenium element human body can not synthesize, can only be by artificial supplement, but there is more than 40 countries and regions selenium deficiency in the whole world,
For health, selenium-supply is very urgent；Currently by various publicity, whole people's selenium-supply upsurge is just at home and abroad quietly risen, but selenium with
Other micro elements needed by human equally have duality, appropriate beneficial, and excess poisoning is harmful, explores safety, the selenium-supply of science
Method turns into the task of top priority, with Na2SeO3It is the inorganic states selenium material of principal component, the yardstick of assurance amount is difficult in, easily causes
Excessive, mainly as drug therapy, general population's supply Se scientific mode is with edible organic Se-rich farm products, the tonic of safety.
Current commercial Se-rich farm products, take applying selenium fertilizer more, convert inorganic selenium by the sorption enhanced of crop and make a living
Thing Organic Selenium, the most frequently used selenium fertilizer is chemicals sodium selenite, and with foliage-spray, this mode presence is easy to run off, sprays inequality
Even, amount control is difficult to hold and the drawback such as certain environmental pollution；Another way is in 230~6300mg/ by selenium content
The selenium mineralses material high of kg is manured into soil, but selenium ore resources are very rare, and reserves are limited, and non-renewable, retains one point of rare selenium
Resource, exactly retains world natural heritage, it is therefore necessary to widen selenium fertile resource.
The exploitation of selenium-rich Coal Gangue Resource：The trend of the non-renewable and increasingly depleted of natural resources, makes bastard coal
The research of utilization of stone waste material is significant, the counties and cities' Coal Gangue Resource very abundant of Enshi eight, existing reserves 7,500,000,000
It is more than ton.Detected through research, rich in multiple beneficial elements such as selenium, molybdenum, vanadium, silicon, particularly total Se content is in 50- for these gangues
200mg/kg, is typical selenium-rich abandoned mine, but the water-soluble active Se content that can be wherein absorbed by plants is relatively low, only accounts for 5-9%
Left and right；Selenium in gangue to be made full use of, to still need and carry out activity excitation treatment to selenium therein, will be converted into water with reference to state selenium
The absorbable activity morphology of dissolubility crop, then the gangue after activation is re-dubbed various selenium fertilizer, it is applied to agricultural production selenium-rich
Organic food.
For the activation of selenium in mineral, at present studies have reported that：Activator uses oxidizing species, and such as strong acid is dense
HNO3, perchloric acid, these fuming liquids are volatile, with strong corrosivity and excitant, not only easily human body are damaged, and
And also there is safety, the environmental pollution to air and water body exploded, the toxic gas material of selfdecomposition of volatilizing is even more and causes mist
One of component of haze；And 1molL-1HNO3The PH=0 of solution, in highly acid, dense HNO is used in activation3Concentration be about 15mol
L-1, therefore the mineral matter of method activation is acid too strong, and perchloric acid is acid stronger, is not suitable for agricultural production application, therefore from ring
Guarantor, safety, cost, practicality etc. are multidimensional to be considered, and is explored new activation method and is had important practical significance.
The content of the invention
It is an object of the invention to provide active element selenium in a kind of alkaline process active coal gangue and its preparation method of selenium fertilizer,
To solve the problems, such as to be proposed in above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：
The preparation method of active element selenium and its selenium fertilizer, comprises the following steps in a kind of alkaline process active coal gangue：
1) raw material is chosen：Gangue with different places of bestowing favour is raw material, and the Se content of gangue used is in 90-
In the range of 170mg/Kg；
2) by gangue with the beginning of mineral samplers pulverizer crush after, cross 100-200 eye mesh screens, unsifted gangue is again
Re-sieving after crushing, obtains the micron order colliery powder that particle diameter is 71-154 μm；
3) by step 2) in prepare colliery powder dry under the conditions of 50 DEG C -60 DEG C, with planetary nanon ball-mill do
Method ball milling micron order colliery powder, obtains the nano-scale coal gangue miberal powder of particle diameter 60-150nm scopes；
4) selection sodium carbonate is activator, and sodium carbonate is made into the solution that mass fraction is 6-40%, by 1:The material of (6-30)
Liquor ratio is by step 3) the nano-scale coal gangue miberal powder and the sodium carbonate liquor that prepare be placed in container and stir, be sufficiently mixed, normal temperature/
Activated 1-4 hours under heating/microwave environment, room temperature is cooled to after the completion of activation, nano-scale coal gangue solid selenium fertilizer is obtained.
As further scheme of the invention：The step 4) in nano-scale coal gangue solid selenium fertilizer be directly manured into soil
Base fertilizer, is made for thing sorption enhanced output selenium-rich organic food.
As further scheme of the invention：With the step 4) in nano-scale coal gangue solid selenium fertilizer as base-material,
It is compound to prepare multi-functional compounding gangue selenium fertilizer according to Different Crop growth needs：By the nano-scale coal gangue selenium bottom after activation
Fertilizer and animal wastes or phytodet ritus mix in appropriate proportions, by compost, make compost mode, continuing fermentation appropriate time, system
Obtain inorganic organic composite selenic fertilizer；Ammoniacal liquor is fully mixed with nano-scale coal gangue solid selenium fertilizer with certain solid-to-liquid ratio, also can root
According to needing further to be added to other zinc, magnesium, boron etc. trace element, spontaneously dry, nitrogen needed for plant is obtained and its
The multielement functionality gangue selenium fertilizer of its micronutrient element.
As further scheme of the invention：The step 4) in, the mass fraction of sodium carbonate is in sodium carbonate liquor
20%；Nano-scale coal gangue miberal powder is 1 with the solid-liquid ratio of sodium carbonate liquor:10；Activation temperature is 85 DEG C, and soak time is
3.5h。
Compared with prior art, the beneficial effects of the invention are as follows：It is activator that the present invention uses alkalescent material sodium carbonate,
Selenium in active coal gangue, makes selenium be converted into the element morphology that plant easily absorbs, and improves the biological utilisation of selenium in gangue
Degree, to make full use of and saves non-renewable valuable selenium-rich Coal Gangue Resource, promotes the money of local selenium-rich gangue abandoned mine
Source rational exploitation and utilization, increases economic efficiency；Promote organic Se-rich food production, advance supply Se scientific process；The present invention keeps away
The highly acid material HNO of strong oxidizing property is exempted from3, perchloric acid activation caused by environmentally friendly, safe hidden danger；And the price of sodium carbonate
Less than dense HNO3, perchloric acid, reduce production cost, meet the requirement of agricultural production；Widen selenium fertile resource channel, be output more
Many common people eat the Se-rich farm products that must be risen and lay a good foundation.
Preparation method technological process of the invention is simple, safe operation, and low production cost is suitable for low dose of or large quantities of
The activation process of amount, can be widely applied to experiment or chemurgy production；User free flexible normal temperature, height on demand can be realized
The activation environment condition pattern such as temperature, microwave, with optimal preparation technology, activation rate is high, and experiment shows, activation rate can reach
40.52%-80.04%；The present invention is activator from sodium carbonate, effectively prevent the strong acid such as concentrated nitric acid, perchloric acid as work
Safe operation hidden danger and the pollution larger to environment such as deep-etching existing for agent, explosive, reduce haze origin cause of formation nitrogen, chlorine
Deng the discharge of oxide, active response country controls haze strategy, with very big application value.
The present invention makes full use of the waste material gangue for bestowing favour abundant, prepares the nano-scale coal gangue powder rich in water soluble selenium,
The selenium such as alternative chemicals sodium selenite or selenium ore deposit fertilizer is used for crops selenium-supply, also can be used as production composite selenic fertilizer or organic selenium fertilizer
Base-material, realization is bestowed favour the recycling of gangue, is the ground of vast Selenium deficiency area and Di Xi areas and the secondary selenium agricultural product of production
Area provides a kind of cheap and good-quality selenium fertile resource.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Embodiment 1
The preparation method of active element selenium and its selenium fertilizer, comprises the following steps in a kind of alkaline process active coal gangue：
1) raw material is chosen：Gangue with different places of bestowing favour is raw material, and the Se content of gangue used is in 90-
In the range of 170mg/Kg；
2) by gangue with the beginning of mineral samplers pulverizer crush after, cross 100-200 eye mesh screens, unsifted gangue is again
Re-sieving after crushing, obtains the micron order colliery powder that particle diameter is 71-154 μm；
3) by step 2) in prepare colliery powder dry under the conditions of 50 DEG C -60 DEG C, with planetary nanon ball-mill do
Method ball milling micron order colliery powder, obtains the nano-scale coal gangue miberal powder of particle diameter 60-150nm scopes；
4) selection sodium carbonate is activator, and sodium carbonate is made into the solution that mass fraction is 20%, by 1:10 solid-liquid ratio will
Step 3) the nano-scale coal gangue miberal powder and the sodium carbonate liquor that prepare be placed in container and stir, be sufficiently mixed, in 30 DEG C of room temperatures/plus
Activated under heat/microwave environment, room temperature is cooled to after the completion of activation, nano-scale coal gangue solid selenium fertilizer is obtained.
The absorbable Se content of material is determined using dnal-channel atomic fluorescence method, compared with selenium summation activity selenium amount before activation, is obtained
It is as shown in table 1 to activation rate：
The activation rate of selenium in the different activation method activation nano-scale coal gangues of table 1
| Activation method | Total selenium before activation | Activity selenium before activation | Activity following activation selenium | Activation rate |
| Room temperature 3.5 hours | 170.82μg/g | 12.519μg/g | 100.655μg/g | 51.59 |
| 65 DEG C 3.5 hours | 170.82μg/g | 12.519μg/g | 120.1μg/g | 62.98 |
| 85 DEG C 3.5 hours | 170.82μg/g | 12.519μg/g | 149.17μg/g | 79.99 |
| Microwave 1 hour | 170.82μg/g | 12.519μg/g | 149.15μg/g | 79.98 |
As shown in Table 1, using microwave activation is in hgher efficiency, effect more preferably, the used time is shorter, the nanoscale bastard coal for preparing
The fertile base fertilizer that is directly manured into soil of stone solid selenium, is made for thing sorption enhanced output selenium-rich organic food.
With the step 4) in nano-scale coal gangue solid selenium fertilizer as base-material, it is compound according to Different Crop growth needs
Prepare multi-functional compounding gangue selenium fertilizer：By the nano-scale coal gangue selenium base fertilizer after activation and animal wastes or phytodet ritus with
Proper proportion mixes, and by compost, makes compost mode, continuing fermentation appropriate time, and inorganic organic composite selenic fertilizer is obtained；With certain
Fully be mixed for ammoniacal liquor and nano-scale coal gangue solid selenium fertilizer by solid-to-liquid ratio, also dependent on needing further to be added to other
Zinc, magnesium, boron etc. trace element, spontaneously dry, the multielement functionality of nitrogen and other micronutrient elements needed for plant is obtained
Gangue selenium fertilizer.
Embodiment 2
The preparation method of active element selenium and its selenium fertilizer, comprises the following steps in a kind of alkaline process active coal gangue：
1) raw material is chosen：Gangue with different places of bestowing favour is raw material, and the Se content of gangue used is in 90-
In the range of 170mg/Kg；
2) by gangue with the beginning of mineral samplers pulverizer crush after, cross 100-200 eye mesh screens, unsifted gangue is again
Re-sieving after crushing, obtains the micron order colliery powder that particle diameter is 71-154 μm；
3) by step 2) in prepare colliery powder dry under the conditions of 50 DEG C -60 DEG C, with planetary nanon ball-mill do
Method ball milling micron order colliery powder, obtains the nano-scale coal gangue miberal powder of particle diameter 60-150nm scopes；
4) selection sodium carbonate is activator, and sodium carbonate is made into mass fraction for 6%, 10%, 20%, 40% this four gradients
The solution of concentration, by 1:10 solid-liquid ratio is by step 3) the nano-scale coal gangue miberal powder and the sodium carbonate liquor that prepare be placed in container
Stirring, is sufficiently mixed, and 3.5h is activated under 85 DEG C of temperature conditionss, and room temperature is cooled to after the completion of activation, and nano-scale coal gangue is obtained
Solid selenium fertilizer.
The absorbable Se content of material is determined using dnal-channel atomic fluorescence method, compared with selenium summation activity selenium amount before activation, is obtained
It is as shown in table 2 to activation rate：
The activation rate of selenium in the various concentrations activator of table 2 activation nano-scale coal gangue
As can be seen from Table 2, the activation rate highest when concentration of sodium carbonate is 40%, reaches 80.01%, but sodium carbonate matter
When amount fraction is 20%, activation rate also up to 79.99%, based on cost consideration, optimal case is that to use mass fraction be 20%
Sodium carbonate liquor activated, best results.
The fertile base fertilizer that is directly manured into soil of nano-scale coal gangue solid selenium for preparing, is made for thing sorption enhanced output selenium-rich
Organic food.
With the step 4) in nano-scale coal gangue solid selenium fertilizer as base-material, it is compound according to Different Crop growth needs
Prepare multi-functional compounding gangue selenium fertilizer：By the nano-scale coal gangue selenium base fertilizer after activation and animal wastes or phytodet ritus with
Proper proportion mixes, and by compost, makes compost mode, continuing fermentation appropriate time, and inorganic organic composite selenic fertilizer is obtained；With certain
Fully be mixed for ammoniacal liquor and nano-scale coal gangue solid selenium fertilizer by solid-to-liquid ratio, also dependent on needing further to be added to other
Zinc, magnesium, boron etc. trace element, spontaneously dry, the multielement functionality of nitrogen and other micronutrient elements needed for plant is obtained
Gangue selenium fertilizer.
Embodiment 3
The preparation method of active element selenium and its selenium fertilizer, comprises the following steps in a kind of alkaline process active coal gangue：
1) raw material is chosen：Gangue with different places of bestowing favour is raw material, and the Se content of gangue used is in 90-
In the range of 170mg/Kg；
2) by gangue with the beginning of mineral samplers pulverizer crush after, cross 100-200 eye mesh screens, unsifted gangue is again
Re-sieving after crushing, obtains the micron order colliery powder that particle diameter is 71-154 μm；
3) by step 2) in prepare colliery powder dry under the conditions of 50 DEG C -60 DEG C, with planetary nanon ball-mill do
Method ball milling micron order colliery powder, obtains the nano-scale coal gangue miberal powder of particle diameter 60-150nm scopes；
4) selection sodium carbonate is activator, and sodium carbonate is made into the solution that mass fraction is 20%, respectively by 1:2、1:6、1:
10、1:20、1:30 solid-liquid ratio is by step 3) the nano-scale coal gangue miberal powder and the sodium carbonate liquor that prepare be placed in container and stir,
It is sufficiently mixed, 3.5h is activated under 85 DEG C of temperature conditionss, room temperature is cooled to after the completion of activation, nano-scale coal gangue solid selenium is obtained
Fertilizer.
The absorbable Se content of material is determined using dnal-channel atomic fluorescence method, compared with selenium summation activity selenium amount before activation, is obtained
It is as shown in table 3 to activation rate：
Activation rate of the different feed liquid of table 3 than selenium in activation nano-scale coal gangue
| Solid-liquid ratio (g/ml) | Total selenium before activation | Activity selenium before activation | Activity following activation selenium | Activation rate % |
| 1:2 | 170.82μg/g | 12.519μg/g | 81.738μg/g | 40.52 |
| 1:6 | 170.82μg/g | 12.519μg/g | 123.257μg/g | 64.83 |
| 1:10 | 170.82μg/g | 12.519μg/g | 149.17μg/g | 79.99 |
| 1:20 | 170.82μg/g | 12.519μg/g | 149.21μg/g | 80.02 |
| 1:30 | 170.82μg/g | 12.519μg/g | 149.26μg/g | 80.04 |
As can be seen from Table 3, when solid-liquid ratio is 1:When 10, activation rate reaches 79.99%, therefore, selection solid-liquid ratio is 1:
10 prepare nano-scale coal gangue solid selenium fertilizer, and be directly manured into soil base fertilizer when using, and is made for thing sorption enhanced output selenium-rich
Organic food.
With the step 4) in nano-scale coal gangue solid selenium fertilizer as base-material, it is compound according to Different Crop growth needs
Prepare multi-functional compounding gangue selenium fertilizer：By the nano-scale coal gangue selenium base fertilizer after activation and animal wastes or phytodet ritus with
Proper proportion mixes, and by compost, makes compost mode, continuing fermentation appropriate time, and inorganic organic composite selenic fertilizer is obtained；With certain
Fully be mixed for ammoniacal liquor and nano-scale coal gangue solid selenium fertilizer by solid-to-liquid ratio, also dependent on needing further to be added to other
Zinc, magnesium, boron etc. trace element, spontaneously dry, the multielement functionality of nitrogen and other micronutrient elements needed for plant is obtained
Gangue selenium fertilizer.
Embodiment 4
The preparation method of active element selenium and its selenium fertilizer, comprises the following steps in a kind of alkaline process active coal gangue：
1) raw material is chosen：Gangue with different places of bestowing favour is raw material, and the Se content of gangue used is in 90-
In the range of 170mg/Kg；
2) by gangue with the beginning of mineral samplers pulverizer crush after, cross 100-200 eye mesh screens, unsifted gangue is again
Re-sieving after crushing, obtains the micron order colliery powder that particle diameter is 71-154 μm；
3) by step 2) in prepare colliery powder dry under the conditions of 50 DEG C -60 DEG C, with planetary nanon ball-mill do
Method ball milling micron order colliery powder, obtains the nano-scale coal gangue miberal powder of particle diameter 60-150nm scopes；
4) selection sodium carbonate is activator, and sodium carbonate is made into the solution that mass fraction is 20%, by 1:10 solid-liquid ratio will
Step 3) the nano-scale coal gangue miberal powder and the sodium carbonate liquor that prepare be placed in container and stir, be sufficiently mixed, 85 DEG C of temperature conditionss
Under activated, and record respectively and calculate activation 1 hour, 2 hours, 3 hours, 3.5 hours and 4 activation rate as a child, it is living
Room temperature is cooled to after the completion of change, nano-scale coal gangue solid selenium fertilizer is obtained.
The absorbable Se content of material is determined using dnal-channel atomic fluorescence method, compared with selenium summation activity selenium amount before activation, is obtained
It is as shown in table 4 to activation rate：
The activation rate of selenium in the different soak time activation nano-scale coal gangues of table 4
| Soak time/h | Total selenium before activation | Activity selenium before activation | Activity following activation selenium | Activation rate % |
| 1 | 170.82μg/g | 12.519μg/g | 98.994 | 50.62 |
| 2 | 170.82μg/g | 12.519μg/g | 117.287 | 61.33 |
| 3 | 170.82μg/g | 12.519μg/g | 134.287 | 71.28 |
| 3.5 | 170.82μg/g | 12.519μg/g | 149.17μg/g | 79.99 |
| 4 | 170.82μg/g | 12.519μg/g | 123.397 | 64.91 |
As can be seen from Table 4, upon activation between for 3.5h when, activation rate highest reaches 79.99%, therefore optimal activation
Time is 3.5h；Nano-scale coal gangue solid selenium fertilizer is prepared, be directly manured into soil base fertilizer when using, and is made for thing sorption enhanced
Output selenium-rich organic food.
With the step 4) in nano-scale coal gangue solid selenium fertilizer as base-material, it is compound according to Different Crop growth needs
Prepare multi-functional compounding gangue selenium fertilizer：By the nano-scale coal gangue selenium base fertilizer after activation and animal wastes or phytodet ritus with
Proper proportion mixes, and by compost, makes compost mode, continuing fermentation appropriate time, and inorganic organic composite selenic fertilizer is obtained；With certain
Fully be mixed for ammoniacal liquor and nano-scale coal gangue solid selenium fertilizer by solid-to-liquid ratio, also dependent on needing further to be added to other
Zinc, magnesium, boron etc. trace element, spontaneously dry, the multielement functionality of nitrogen and other micronutrient elements needed for plant is obtained
Gangue selenium fertilizer.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined
May be appreciated other embodiment.
Claims (4)
1. in a kind of alkaline process active coal gangue active element selenium and its selenium fertilizer preparation method, it is characterised in that including following step
Suddenly：
1) raw material is chosen：Gangue with different places of bestowing favour is raw material, and the Se content of gangue used is in 90-170mg/Kg
In the range of；
2) by gangue with after crushing at the beginning of mineral samplers pulverizer, mistake 100-200 eye mesh screens, unsifted gangue is crushed again
Re-sieving afterwards, obtains the micron order colliery powder that particle diameter is 71-154 μm；
3) by step 2) in prepare colliery powder dried under the conditions of 50 DEG C -60 DEG C, with planetary nanon ball-mill dry method ball
Mill micron order colliery powder, obtains the nano-scale coal gangue miberal powder of particle diameter 60-150nm scopes；
4) selection sodium carbonate is activator, and sodium carbonate is made into the solution that mass fraction is 6-40%, by 1:The solid-liquid ratio of (6-30)
By step 3) the nano-scale coal gangue miberal powder and the sodium carbonate liquor that prepare be placed in container and stir, be sufficiently mixed, in normal temperature/plus
Activated 1-4 hours under heat/microwave environment, room temperature is cooled to after the completion of activation, nano-scale coal gangue solid selenium fertilizer is obtained.
2. in alkaline process active coal gangue according to claim 1 active element selenium and its selenium fertilizer preparation method, its feature
Be, the step 4) in nano-scale coal gangue solid selenium fertilizer be directly manured into soil base fertilizer, be made for thing sorption enhanced output richness
Selenium organic food.
3. in alkaline process active coal gangue according to claim 1 active element selenium and its selenium fertilizer preparation method, its feature
Be, with the step 4) in nano-scale coal gangue solid selenium fertilizer as base-material, according to Different Crop growth needs, be combined preparation
Multi-functional compounding gangue selenium fertilizer：By the nano-scale coal gangue selenium base fertilizer after activation and animal wastes or phytodet ritus with appropriate
Ratio mixes, and by compost, makes compost mode, continuing fermentation appropriate time, and inorganic organic composite selenic fertilizer is obtained；With certain solid-liquid
Than ammoniacal liquor and nano-scale coal gangue solid selenium fertilizer are fully mixed, also dependent on need further to be added to other zinc, magnesium,
Boron etc. trace element, spontaneously dries, the multielement functionality gangue of nitrogen and other micronutrient elements needed for plant is obtained
Selenium fertilizer.
4. in alkaline process active coal gangue according to claim 1 active element selenium and its selenium fertilizer preparation method, its feature
It is, the step 4) in, the mass fraction of sodium carbonate is 20% in sodium carbonate liquor；Nano-scale coal gangue miberal powder and sodium carbonate
The solid-liquid ratio of solution is 1:10；Activation temperature is 85 DEG C, and soak time is 3.5h.
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| CN108821827A (en) * | 2018-06-13 | 2018-11-16 | 中科建成矿物技术(北京)有限公司 | It is a kind of with selenium-rich rock be main waste selenium-rich mineral fertilizer production method |
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| CN114702359A (en) * | 2022-04-14 | 2022-07-05 | 丁风霞 | Selenium-rich nutrient solution for crops and preparation method thereof |
| CN115121575A (en) * | 2022-06-27 | 2022-09-30 | 中国矿业大学 | Method for preparing coal gangue-based active powder and curing nuclide Se |
| CN115322023A (en) * | 2022-08-16 | 2022-11-11 | 恩施硒圣植物科技有限公司 | Biological selenium fertilizer with high organic selenium conversion rate and preparation method thereof |
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| CN115322023A (en) * | 2022-08-16 | 2022-11-11 | 恩施硒圣植物科技有限公司 | Biological selenium fertilizer with high organic selenium conversion rate and preparation method thereof |
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Application publication date: 20170531 |