CN106905000A - The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent and its application - Google Patents
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent and its application 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
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
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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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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
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- C05D9/02—Other inorganic fertilisers containing trace elements
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Abstract
Dry-forming method and its application the invention discloses a kind of high-efficient selenium-rich soil nutrient hardening agent product, the method mixing of the coarse crushing of selenium ore, selenium ore in small, broken bits, miberal powder and activator first and then raw material homomixture is carried out under the conditions of 200~600 DEG C 0.5~4h of static conversion, cooling, obtain activating miberal powder, i.e. high-efficient selenium-rich soil nutrient hardening agent.The present invention, as activator, can effectively control and absorb the selenium element discharged in selenium ore high-temperature process using basic matterial, be conducive to the generation of water soluble selenium；The Se content in plant can be significantly improved as base fertilizer using selenium-rich soil nutrition fortifier product of the present invention simultaneously, it improves 5 times, improves more than 12 times than blank group plant Se content than unactivated selenium mineral powder group plant Se content.
Description
Technical field
The present invention relates to selenium-rich soil nutrition fortifier preparation method, in particular to a kind of reinforcing of high-efficient selenium-rich soil nutrient
The dry-forming method application of agent.
Background technology
Selenium be human body and animal necessary to one of 14 kinds of trace elements, with improving body immunity, anti-aging and prevention
The multinomial function such as cancer.World health organisation recommendations adult daily intakes selenium amount for 40-400 micrograms, and Chinese NNFA is given
The DRIs for going out, wherein selenium are micro- gram/day of 60-400.Substantial amounts of geologic survey and nutrition
Investigation result shows, the area of China 72% is Selenium deficiency area, current China microgram of daily intake about 26 per capita, well below generation
The standard that boundary's health organization and Chinese NNFA are recommended.Numerous studies are also shown that and be presently the most by diet selenium-supply
Safe and reliable and feasible selenium-supply approach.Therefore, the theory based on meals selenium-supply, in recent years in Chinese NNFA and academia
Advocating under, under the guiding and supporting of governments at all levels, all parts of the country be widely implemented " whole people's selenium-supply engineering ", emerging selenium-rich
Industry development is rapid.
The basis of selenium-rich industry development is selenium-rich agricultural, and the key of selenium-rich agricultural development is the steady of Se-rich farm products Se content
Fixed up to standard, i.e., qualified Se-rich farm products are planted through traditional agriculture mode by selenium-rich soil, planted by crops
The selenium-rich product rich in Organic Selenium that thing conversion absorbs, is characterized in that Se content and organic selenium content are surely controlled up to standard, meet selenium-rich
Product national standard.
Research shows that crop Se content height is controlled primarily by the soil Se content and its form of its growth, so improving
Soil Se content, particularly raising are the key of selenium-rich crops plantation beneficial to the content of the Available Selenium of plant absorption, are also rich
The key problem of selenium soil nutrient hardening agent product design --- the i.e. content of selenium total amount and Available Selenium.
It is selenium source that conventional selenium hypertrophy directly uses sodium selenite more at present, prepares liquid fertilizer or foliar fertilizer, this method
The drawbacks of be：High cost, it is easy to run off (need repeatedly fertilising), user and has poisoning risk, particularly should not be used in tealeaves and vegetable
Dish etc. eats leaf type plant；Will also result in environmental pollution simultaneously.On the other hand, in China's selenium-rich crops tradition growing area, more often
The implantation methods seen are to utilize selenium-rich soil, selenium-rich crops are planted using conventional method, because selenium element has a little in nature
The characteristics of shape unbalanced distribution, the crop Se content planted in this way is difficult to ensure, feature is that unstable control is up to standard, is not inconsistent
Selenium-rich product national standard is closed, therefore selenium-rich product can not be identified.
In Se-rich rice research it has also been found that, soil Se content is very high, the crop of plantation not necessarily selenium-rich, during its reason is soil
The Available Selenium content of bioavailable is not high.Generally, using the KH of 0.1mol/L2PO4Biology in solution extraction environment sample
Using state selenium, biologically effective selenium is most of to be less than 5% no more than 10% in general selenium-rich rock.It can be seen that, research and development are a kind of high
Effect, convenient, economic, environmentally friendly activation method, improve selenium-rich rock biologically effective Se content, are to prepare selenium-rich soil fortification
The key problem in technology of agent.
From it has been reported that rock selenium activation correlation technique in terms of, its subject matter is：
1st, the activation rate of selenium is relatively low, causes the bioavailability of its product low, causes a large amount of wastes of valuable selenium ore resources,
Long-term a large amount of use can also cause agricultural land soil secondary pollution；
2nd, technology path is excessively complicated, technical conditions control difficulty is big, the production cycle is long, is not suitable for large-scale production；
3rd, wet chemistry techniques are used more, largely using chemical reagent, while producing waste discharge, environment is easily caused
Pollution；
4th, the checking test time of products application is short, less varieties, planting experiment application area are small, i.e., products application is promoted
Element task is not abundant enough；
5th, due to not enough can be immature etc. the multi-party reason of technological reserve, at present in Chinese Se-rich rice also without a scale
The entity factory of production selenium fertilizer.
For example, Chinese invention patent a kind of " method of utilization microbial fermentation production activation selenium mineral powder
(CN102703561B) " it is referred to and the selenium activation ratio after selenium activation rate, but its activation is improved using microorganism species fermentation process
Rate is only 26.4%, and whole activation long flow path reaches nearly 2 months.A kind of " production method for lifting selenium activation rate in selenium mineral powder
(CN102924130B) " activated by windrow in patent, although improve to 58.9% selenium activation rate, but largely use oxidisability
Extremely strong potassium permanganate and hydrogen peroxide, this will destroy the original oxidation-reduction potential of soil, not utilize continuable agricultural to plant
Plant and produce, while the chemical reagent for adding is various, the time-consuming conservative estimation of technological process is at 30 more than hour." selenium mineralses have
Machine fertilizer and preparation method thereof (CN105085046A) " on the basis of above-mentioned patented technology (CN102924130B), according to certain
Ratio is (by 3:1 to 3:2) tunning of the generations such as stalk, feces of livestock and poultry and fermentation mushroom is mixed with, technological process is more numerous
It is miscellaneous, it is time-consuming longer, and actual science and technology gold content is relatively low.
Carried out at activation using substantial amounts of strong acid and strong base in patent " a kind of activation method of selenium mineral powder (CN103539081) "
Reason, has obtained more than 0.1% dry, and especially with chloroazotic acid as activator, its destructive power to environment is extremely strong, therefore
It is aborning substantially infeasible.Microorganism is also adopted by " a kind of preparation method of selenium-enriched organic fertilizer (CN104230446) " to enter
Row activation, the duration up to more than 45 days, 15mg/kg containing selenium in the selenium that obtains fertilizer, but its yield is too low, 1000kg raw material (selenium
Content 2.4mg/kg) only obtain less than 160kg products (15mg/kg).A kind of patent " processing of selenium-rich soil nutrition fortifier
Method (CN104496702) " is related to carry out miberal powder nanosizing, and selenium ore deposit Se content used is more than 20g/kg, is not considering
The situation of its activation rate, the popularization of the technology also there will be many realistic problems, and such as selenium mineral resources is unsustainable, nanosizing cost mistake
It is high.
The content of the invention
The purpose of the present invention is directed to the bottleneck problem of the China of restriction for a long time selenium-rich industry development, i.e. selenium-rich product not
Surely control problem up to standard, there is provided a kind of dry-forming method of high-efficient selenium-rich soil nutrient hardening agent and its application, the method are intended to
Using selenium-rich soil nutrition fortifier product and its technology, by the skill for surveying native selenium-supply method, transformation and structure standardization farmland
Art path, offer are suitable to the selenium-rich soil environment of selenium-rich crops growth, and large-scale planting meets the richness of selenium-rich product national standard
Selenium agricultural product.
To achieve the above object, the dry-forming method of a kind of high-efficient selenium-rich soil nutrient hardening agent that the present invention is provided,
Comprise the following steps：
1) selenium ore coarse crushing：Selenium ore is crushed, then drying and processing, the selenium ore dried；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore of grain refined is obtained；
3) mixing of miberal powder and activator：To activator is added in the selenium ore of grain refined, it is well mixed, obtains raw material
Homomixture；Wherein, the activator quality is the 10~50% of selenium ore quality, and the activator is CaCO3Or Ca (OH)2Or
CaO or Na2CO3, calcium salt and sodium salt why are selected, because under the high temperature conditions, they have absorption to volatile element selenium
Ability.
4) raw material homomixture is carried out 0.5~4h of static conversion under the conditions of 200~600 DEG C,
5) cool down, take out product and carry out mixing treatment again, the upper and lower product is reached homogenization, whole flow process
Terminate, obtain activating miberal powder, i.e. high-efficient selenium-rich soil nutrient hardening agent, using the KH of 0.1mol/L2PO4Solution is extracted in product
Bioavailable state selenium, calculates its selenium activation rate and may be up to 66.7~85.0%.
Further, the step 1) in, the raw ore of basic, normal, high Se content scope in selenium ore, with selenium ore Se content
It is the raw ore of 100~1000mg/kg, the granularity that the selenium ore is crushed is less than<15mm.
Yet further, the step 1) in, to prevent the volatilization loss of Organic Selenium in ore, according to research and experiment warp
Test, the temperature of drying is 60~120 DEG C.
Yet further, the step 2) in, fine grinding selenium ore is 20~200 mesh.
Yet further, the step 3) in, the activator is CaCO3Or Ca (OH)2Or CaO or Na2CO3, why
Selection calcium salt and sodium salt, because under the high temperature conditions, they have adsorption capacity to volatile element selenium.
Yet further, the step 4) in, homomixture 0.5~4h of static conversion under the conditions of 200~600 DEG C.
Yet further, the step 3) in, the activator is CaO or CaCO3。
Base fertilizer used by planting is being prepared present invention also offers a kind of above-mentioned high-efficient selenium-rich soil nutrient hardening agent
Using.
Theoretical foundation of the invention
1st, influence of the powder particle size to activation effect and volatility
Take selenium content be 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the miberal powder that granularity is 160 mesh；Point
Another name takes the miberal powder 50g that granularity is 20,40,60,80,120,160,200 mesh, pours into resistant to elevated temperatures crucible, is separately added into ore deposit
The CaO of silty amount 10%, is well mixed with sample powder.Respectively at the Muffle kiln roasting that temperature is 600 DEG C 30 minutes.Roasting
After complete, opening of cutting off the electricity supply Muffle fire door, after sample is taken out after temperature reduction, obtains high-efficient selenium-rich soil nutrient hardening agent product
Product.Product is divided into the upper and lower simultaneously, sufficient and oxygen deficiency condition the product of oxygen is represented respectively.Analysis result shows
Show, effectively Se content is higher 2 times than the bottom effective Se content of anoxic layer product in top oxygen abundance layer product, illustrates activation process
Middle oxygen abundance is a key factor；When adding 10%CaO, the volatility of selenium is comprehensively examined 5% or so in activation product
Consider activation effect and volatility (the higher the better for activation rate, and volatility is more low better), there is 94.5~95.9% selenium quilt in ore
Absorption is 160 mesh in fine grinding selenium ore in basic matterial, and the activation rate of selenium is up to 66.7%, and its volatility is
4.6%, effect is best.
To activation effect and volatility, (total selenium, effective selenium contain the powder particle size of table 1. in selenium-rich soil nutrition fortifier product
Amount)
Note：When activator additional proportion is 10%, miberal powder is respectively with the total selenium theoretical content of the homomixture of activator
113.6mg/kg.Volatility is the ratio of the total selenium of product and homomixture theory Se content.Activation rate is KH2PO4Extract selenium amount and mix
Even physics discusses the ratio of Se content.
2nd, influence of the different temperatures to activation effect and volatility
A. the Na of powdered ore quality 50% is added2CO3When, influence experiment of the different temperatures to activation effect and volatility
1) take selenium content be 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the miberal powder that granularity is 160 mesh；
2) the miberal powder 50g that granularity is 160 mesh is weighed, is poured into resistant to elevated temperatures crucible, add the work of powdered ore quality 50%
Agent Na2CO3, it is well mixed with sample powder.
3) respectively at the Muffle kiln roasting 3h that temperature is 200,300,400,500,600 DEG C.After being calcined, cut off the electricity supply
Muffle fire door is opened, after sample is taken out after temperature reduction, high-efficient selenium-rich soil nutrient hardening agent product is obtained.
Integrated comparative activation rate and volatility, are known by table 2, and with the rising of activation temperature, the volatility of selenium is into wave
Change, and at 600 DEG C, the volatility of selenium is minimum, illustrates Na2CO3It is that 600 DEG C of adsorption capacities for showing are most strong in temperature
(volatility is only 8.6%).Temperature can reach 73.3% by the activation rate of 600 DEG C of acquisition products simultaneously.
Influence of the different temperatures of table 2 to activation effect and volatility
Note：Theoretical Se content is 83.3mg/kg in the homomixture of miberal powder and 50% activator.Volatility is the total selenium of product
With the ratio of homomixture theory Se content.Activation rate is KH2PO4Extract the ratio of selenium amount and homomixture theory Se content.
B. the CaCO of powdered ore quality 50% is added3When, influence experiment of the different temperatures to activation effect and volatility
1) take selenium content be 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the miberal powder that granularity is 160 mesh；
2) the miberal powder 50g that granularity is 160 mesh is weighed, is poured into resistant to elevated temperatures crucible, add the work of powdered ore quality 50%
Agent CaCO3, it is well mixed with sample powder.
3) respectively at the Muffle kiln roasting 3h that temperature is 200,300,400,500,600 DEG C.After being calcined, cut off the electricity supply
Muffle fire door is opened, after sample is taken out after temperature reduction, high-efficient selenium-rich soil nutrient hardening agent product is obtained.
Integrated comparative activation rate and volatility, are known by table 3, and with the rising of activation temperature, the volatility of selenium is into wave
Change, and when temperature is 600 DEG C, the volatility of selenium is minimum, illustrates CaCO3It is 600 DEG C of energy of adsorptions for showing in temperature
Power is most strong (volatility is only 6.8%).Temperature is by 600 DEG C of activation rates of acquisition product are up to 83.9% simultaneously.
The different temperatures of table 3. is to activation effect and volatility
Note：Theoretical Se content is 83.3mg/kg in the homomixture of miberal powder and 50% activator.Volatility is the total selenium of product
With the ratio of homomixture theory Se content.Activation rate is KH2PO4Extract the ratio of selenium amount and homomixture theory Se content.
C. the Ca (OH) of powdered ore quality 50% is added2When, different temperatures is to activation effect and volatility
1) take selenium content be 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the miberal powder that granularity is 160 mesh；
2) the miberal powder 50g that granularity is 160 mesh is weighed, is poured into resistant to elevated temperatures crucible, add the work of powdered ore quality 50%
Agent Ca (OH)2, it is well mixed with sample powder.
3) respectively at the Muffle kiln roasting 3h that temperature is 200,300,400,500,600 DEG C.After being calcined, cut off the electricity supply
Muffle fire door is opened, after sample is taken out after temperature reduction, high-efficient selenium-rich soil nutrient hardening agent product is obtained.
Integrated comparative activation rate and volatility, are known by table 4, and with the rising of activation temperature, the volatility of selenium is into wave
Change, and when temperature is 600 DEG C, the volatility of selenium is minimum, illustrates Ca (OH)2It is 600 DEG C of absorption for showing in temperature
Ability is most strong (volatility is only 5.2%).Temperature is by 600 DEG C of activation rates of acquisition product are up to 70.8% simultaneously.
The different temperatures of table 4. is to activation effect and volatility
Note：Theoretical Se content is 83.3mg/kg in the homomixture of miberal powder and 50% activator.Volatility is the total selenium of product
With the ratio of homomixture theory Se content.Activation rate is KH2PO4Extract the ratio of selenium amount and homomixture theory Se content.
When d. adding the CaO of powdered ore quality 50%, influence experiment of the different temperatures to activation effect and volatility
1) take selenium content more than 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the ore deposit that granularity is 160 mesh
Powder；
2) the miberal powder 50g that granularity is 160 mesh is weighed, is poured into resistant to elevated temperatures crucible, add the work of powdered ore quality 50%
Agent CaO, is well mixed with sample powder.
3) respectively at the Muffle kiln roasting 3h that temperature is 200,300,400,500,600 DEG C.After being calcined, cut off the electricity supply
Muffle fire door is opened, after sample is taken out after temperature reduction, high-efficient selenium-rich soil nutrient hardening agent product is obtained.
Integrated comparative activation rate and volatility, are known by table 5, and with the rising of activation temperature, the volatility of selenium is into wave
Change, and when temperature is 600 DEG C, the volatility of selenium is minimum, illustrates CaO in 600 DEG C or so the adsorption capacities for showing most
By force (volatility is only 2.8%).It can be seen that adsorption capacities of the CaO when temperature is 600 DEG C is significantly stronger than other basic matterials, while
The activation rate of product is obtained when temperature is by 600 DEG C up to 74.1%.
The different temperatures of table 5. is to activation effect and volatility
Note：Theoretical Se content is 83.3mg/kg in the homomixture of miberal powder and 50% activator.Volatility is the total selenium of product
With the ratio of homomixture theory Se content.Activation rate is KH2PO4Extract the ratio of selenium amount and homomixture theory Se content.
In sum, it is 600 DEG C in temperature, obtains high-efficient selenium-rich soil nutrient hardening agent product effect best.
3rd, influence of the different activators to activation effect and volatility
1) take selenium content more than 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the ore deposit that granularity is 160 mesh
Powder；
2) the miberal powder 50g that granularity is 160 mesh is weighed, is poured into resistant to elevated temperatures crucible, add the work of powdered ore quality 50%
Agent NaCO3Or CaCO3Or Ca (OH)2Or CaO, it is well mixed with sample powder.
3) respectively at the Muffle kiln roasting 3h that temperature is 200,300,400,500,600 DEG C.After being calcined, cut off the electricity supply
Muffle fire door is opened, after sample is taken out after temperature reduction, high-efficient selenium-rich soil nutrient hardening agent product is obtained.
Integrated comparative activation rate and volatility, are known by table 6, use CaCO3When, activation rate highest, but volatility also compares
It is higher, and when using CaO, activation rate second is high, and volatility is minimum, considers, most preferably CaO, and suboptimum elects CaCO as3。
Influence of the different activators of table 6. to activation effect and volatility
Note：Theoretical Se content is 83.3mg/kg in the homomixture of miberal powder and 50% activator.Volatility is the total selenium of product
With the ratio of homomixture theory Se content.Activation rate is KH2PO4Extract the ratio of selenium amount and homomixture theory Se content.
4th, influence of the different addition of identical activator to activation effect and volatility
Take selenium content be 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the miberal powder that granularity is 160 mesh；Claim
The miberal powder 50g that granularity is 160 mesh is taken, is poured into resistant to elevated temperatures crucible, be separately added into powdered ore quality 10%, 20%, 30%, 40%
Activator CaO with 50%, is well mixed with sample powder.Respectively at the Muffle kiln roasting 3h that temperature is 600 DEG C.It has been calcined
Afterwards, opening of cutting off the electricity supply Muffle fire door, after sample is taken out after temperature reduction, obtains high-efficient selenium-rich soil nutrient hardening agent product.
It is bigger in view of CaO additions, it is bigger to Influence To Soil, such as it is likely to result in soil hardening, soil acidity or alkalinity and loses
Adjust etc..Therefore investigated under different CaO additions, the Changing Pattern of selenium activation rate.Known by table 7, when subtracting for activator addition
When less to 10%, selenium volatility (10.4%) slightly has rising, while the activation rate (70.3%) of selenium still keeps higher level, institute
It is 50% to state CaO additions, and effect is good.
Influence of the different addition of the identical activator of table 7. to activation effect and volatility
Note：When activator additional proportion is 10%, 20%, 30%, 40%, 50%, in the homomixture of miberal powder and activator
Theoretical Se content is respectively 113.6,104.2,96.2,89.3,83.3mg/kg.Volatility is the total selenium of product theoretical with homomixture
The ratio of Se content.Activation rate is KH2PO4Extract the ratio of selenium amount and homomixture theory Se content.
5th, influence of the different heat times to activation effect and volatility
Take selenium content more than 125mg/kg selenium-rich rock, by coarse crushing, it is in small, broken bits after, obtain the miberal powder that granularity is 160 mesh；
The miberal powder 50g that granularity is 160 mesh is weighed, is poured into resistant to elevated temperatures crucible, be separately added into the activator CaO of powdered ore quality 10%,
It is well mixed with sample powder.Respectively at the Muffle kiln roasting 0.5,1,2,3,4h that temperature is 600 DEG C.After being calcined, cut-out
Power supply opening Muffle fire door, after sample is taken out after temperature reduction, obtains high-efficient selenium-rich soil nutrient hardening agent product.Known by table 8,
With the shortening of soak time, the volatility of selenium is constantly reduced, upon activation between for 0.5h when, the volatility of selenium is only 4.6%.
With this herewith, the activation rate of selenium can reach 66.7%.
Influence of the different heat time of table 8. to activation effect and volatility
Note：When activator additional proportion is 10%, miberal powder is respectively with the total selenium theoretical content of the homomixture of activator
113.6mg/kg.Volatility is the ratio of the total selenium of product and homomixture theory Se content.Activation rate is KH2PO4Extract selenium amount and mix
Even physics discusses the ratio of Se content.
The beneficial effects of the present invention are：
, using basic matterial as activator, can effectively control and absorb release in selenium ore high-temperature process for the present invention
The selenium element of releasing, is conducive to the generation of water soluble selenium；Simultaneously using selenium-rich soil nutrition fortifier product of the present invention the bottom of as
Fertilizer, can significantly improve the Se content in plant, and it improves 5 times, is planted than blank group than unactivated selenium mineral powder group plant Se content
Thing Se content improves more than 12 times.In addition, using the experiment parameter of optimization, being set by the dynamic activation core of working for designing processing
It is standby, high-efficient selenium-rich soil nutrient hardening agent product can be obtained in 3-5min, and easily accomplish scale production, daily capacity surpasses
Cross 50 tons.
Specific embodiment
In order to preferably explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
Present disclosure is not limited solely to following examples.
Embodiment 1
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 1, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To CaO is added in selenium ore, it is well mixed, obtains the homomixture of raw material；Its
In, the activator quality is the 10% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 0.5h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 1 is supported, its selenium activation rate may be up to 66.7%, and volatility is 4.6%.
Embodiment 2
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 2, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To adding Na in selenium ore2CO3, it is well mixed, obtain the homomixture of raw material；Its
In, the activator quality is the 50% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 3h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 2 is supported, its selenium activation rate may be up to 73.3%, and volatility is 8.6%.
Embodiment 3
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 3, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To adding CaCO in selenium ore3, it is well mixed, obtain the homomixture of raw material；Its
In, the activator quality is the 50% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 3h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 3 is supported, its selenium activation rate may be up to 83.9%, and volatility is 6.8%.
Embodiment 4
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 4, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To addition Ca (OH) in selenium ore2, it is well mixed, obtain the homomixture of raw material；
Wherein, the activator quality is the 50% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 3h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 4 is supported, its selenium activation rate may be up to 70.8%, and volatility is 5.2%.
Embodiment 5
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 5, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To CaO is added in selenium ore, it is well mixed, obtains the homomixture of raw material；Its
In, the activator quality is the 50% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 3h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 5 is supported, its selenium activation rate may be up to 74.1%, and volatility is 2.8%.
Embodiment 6
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 6, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To CaO is added in selenium ore, it is well mixed, obtains the homomixture of raw material；Its
In, the activator quality is the 30% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 3h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 6 is supported, its selenium activation rate may be up to 74.9%, and volatility is 5.2%.
Embodiment 7
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 7, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To CaO is added in selenium ore, it is well mixed, obtains the homomixture of raw material；Its
In, the activator quality is the 10% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 2h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 7 is supported, its selenium activation rate may be up to 70.9%, and volatility is 6.5%.
Embodiment 8
The dry-forming method of high-efficient selenium-rich soil nutrient hardening agent 8, comprises the following steps：
1) selenium ore coarse crushing：By selenium content for the selenium-rich rock selenium ore of 125mg/kg is crushed, then drying and processing, obtains
The selenium ore of drying；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore that granularity is 160 purposes is obtained；
3) mixing of miberal powder and activator：To CaO is added in selenium ore, it is well mixed, obtains the homomixture of raw material；Its
In, the activator quality is the 50% of selenium ore quality,
4) homomixture of raw material is placed in the static conversion 0.5h of Muffle kiln roasting that temperature is 600 DEG C,
5) cool down, after being calcined, opening of cutting off the electricity supply Muffle fire door is mixed after taking-up product after temperature reduction and again
Even treatment, makes the upper and lower product reach homogenization, and whole flow process terminates, and obtains activating miberal powder, i.e. high-efficient selenium-rich soil battalion
Hardening agent 8 is supported, its selenium activation rate may be up to 85.0%, and volatility is 1.9%.
Embodiment 9：Selenium-rich soil nutrition fortifier product actual effect --- green plant checking test
Using the high-efficient selenium-rich soil nutrient hardening agent obtained under optimum condition as base fertilizer, carry out the potted plant reality of potato
Test, as a result find that the potato Se content that the selenium-rich soil nutrition fortifier prepared using this method is planted reaches 670 μ g/kg, than
The potato Se content planted using original miberal powder improves 5 times, and 12 times are improved than blank assay group potato Se content.It is described
High-efficient selenium-rich soil nutrient hardening agent is good as base fertilizer effect.
Other unspecified parts are prior art.Although above-described embodiment is made that to the present invention and retouch in detail
State, but it is only a part of embodiment of the invention, rather than whole embodiments, people can also according to the present embodiment without
Other embodiment is obtained under the premise of creativeness, these embodiments belong to the scope of the present invention.
Claims (7)
1. a kind of dry-forming method of high-efficient selenium-rich soil nutrient hardening agent, it is characterised in that：Comprise the following steps：
1) selenium ore coarse crushing：Selenium ore is crushed, then drying and processing, the selenium ore dried；
2) selenium ore is in small, broken bits：The selenium ore of drying is carried out into fine grinding, the selenium ore of grain refined is obtained；
3) mixing of miberal powder and activator：To activator is added in the selenium ore of grain refined, it is well mixed, obtains the mixing of raw material
Thing；Wherein, the activator quality is the 10~50% of selenium ore quality, and the activator is CaCO3Or Ca (OH)2Or CaO or
Na2CO3；
4) raw material homomixture is carried out into static conversion；
5) cool down, take out product and carry out mixing treatment again, the upper and lower product is reached homogenization, whole flow process knot
Beam, obtains activating miberal powder, i.e. high-efficient selenium-rich soil nutrient hardening agent, and its selenium activation rate may be up to 66.7~85.0%.
2. the dry-forming method of high-efficient selenium-rich soil nutrient hardening agent according to claim 1, it is characterised in that：The step
It is rapid 1) in, 100~1000mg/kg of Se content in selenium ore, the granularity that the selenium ore is crushed is less than<15mm.
3. the dry-forming method of high-efficient selenium-rich soil nutrient hardening agent according to claim 2, it is characterised in that：The step
It is rapid 1) in, the temperature of drying is 60~120 DEG C.
4. the dry-forming method of high-efficient selenium-rich soil nutrient hardening agent according to claim 2, it is characterised in that：The step
It is rapid 2) in, fine grinding selenium ore be 20~200 mesh.
5. the dry-forming method of high-efficient selenium-rich soil nutrient hardening agent according to claim 2, it is characterised in that：The step
It is rapid 4) in, homomixture 0.5~4h of static conversion under the conditions of 200~600 DEG C.
6. the dry-forming method of high-efficient selenium-rich soil nutrient hardening agent according to claim 5, it is characterised in that：The step
It is rapid 3) in, the activator be CaO or CaCO3。
7. high-efficient selenium-rich soil nutrient hardening agent described in a kind of claim 1 is preparing the application of base fertilizer used by planting.
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