CN105175136A - Adsorption nitrogen fertilizer with modified natural zeolite and preparation method thereof - Google Patents

Abstract

The invention discloses an adsorption nitrogen fertilizer with modified natural zeolite and a preparation method of the adsorption nitrogen fertilizer. The adsorption nitrogen fertilizer is prepared from the following raw materials in parts by weight: natural zeolite, 2mol/L diluted HCl, a 6wt% NaCl solution, ammonium chloride, urea, borax, chitin, attapulgite powder, clay and a proper amount of water. Particularly, by virtue of various techniques, the capacities of the natural zeolite on soil modification and ammonium nitrogen adsorption are relatively prominent. According to the nitrogen fertilizer with the modified zeolite for adsorption, the release rate of a nitrogen source is decreased, the utilization rate is increased, the environment is protected, and energy sources are saved.

Description

Absorption nitrogenous fertilizer of a kind of modified natural zeolite and preparation method thereof

Technical field

The invention belongs to the Technology field of fertilizer, be specifically related to absorption nitrogenous fertilizer of a kind of modified natural zeolite and preparation method thereof.

Background technology

Zeolite is the general name of zeolite race mineral, and the natural zeolite found in the world so far reaches more than 40 and plants, and comparatively common are euthalite, clinoptilolite, lomontite, erionite, chabazite, mordenite etc.Zeolite is primarily of SiO ₂, Al ₂o ₃, H ₂the silicate minerals that O and basic metal, alkaline-earth metal ions four part form, wherein silicon-oxy tetrahedron and aluminum-oxygen tetrahedron constitute the three-dimensional space rack-like structure of zeolite, loose, the easy displacement property of basic metal, alkaline-earth metal and water molecules, make zeolite have special application performance-adsorption, ion exchange etc.

Nowadays agricultural, plant husbandry have become the important indicator of a national productivity, in order to improve productivity effect, large-scale agricultural, plant husbandry are accelerated to produce, and often cause planting site nutrition to put down weary, and inevitably abuse chemical fertilizer improves production, a large amount of uses of fertilizer, really output can be improved, but fertilizer within the time of plantation, all can not utilize effectively, there is data declaration: the fertilizer component of more than 30% enters soil, river because of rain drop erosion, causes serious pollution.Cause algae " wildness ", fish are because of anoxic mortality, and cause ecological serious unbalance, spend in river regulation every year, the expense of land forming should not be underestimated.

Water pollution makes the current drinking water safety of China face serious threat, and ammonia nitrogen, as the wherein common pollutent that coexists, adopts Biochemical method to be one of control techniques of current preference.

Summary of the invention

In order to improve soil, realize the slow-release function to mineral nutrient element, improve utilization rate of fertilizer, reduce because of the pollution of fertilizer abuse to environment, the present invention realizes by the following method:

A kind of absorption nitrogenous fertilizer of modified natural zeolite, it is characterized in that, be made up of the raw material of following weight part: rare HCl10 ~ 15 of natural zeolite 50 ~ 55,2mol/L, 6wt%NaCl solution 150 ~ 180, ammonium chloride 80 ~ 100, urea 15 ~ 20, borax 6 ~ 10, chitin 2 ~ 4, attapulgite 30 ~ 35, clay 20 ~ 30 and appropriate water;

2, the preparation method of a kind of absorption nitrogenous fertilizer of modified natural zeolite according to claim 1, is characterized in that, comprise following step:

(1) natural zeolite is first carried out preliminary pulverizing, become the bulk of 6 ~ 8cm diameter, then the high temperature kiln calcining 5 ~ 7h of 800 ~ 1000 DEG C is put in unification, and it is broken to carry out secondary fine fine powder after cooling, became the particle of 50 ~ 60 mesh sieves, finally rare HCl of particle pulvis 2mol/L was eluriated 2 ~ 3 times;

(2) granule of (1) gained is put into the NaCl solution of 6wt%, under the constant temperature of 30 DEG C, 140r/min stirs 18 ~ 20h, with deionized water drip washing 2 ~ 3 times after completing, and last dry for standby;

(3) ammonium chloride is added water to just in time dissolve completely, add the zeolite granular of (2) described modification, unifiedly put into supersonic cleaning machine, power 700 ~ 750W, temperature 30 DEG C, effect 2 ~ 2.5h;

(4) mixing urea, borax and other remaining component, is added in the total material described in (3), adds water in right amount and be modulated into homogenate, controls water content 45 ~ 60%, spray granulating finally by drum hot blast.

Fertilizer utilization NaCl solution of the present invention is improved natural zeolite, obtain a kind of modified zeolite particle ammonium nitrogen to adsorption sustained-release function, experimentally measure the best modified effect of different N aCl strength of solution simultaneously, accurately take the zeolite of certain mass in the tool plug Erlenmeyer flask of 250ml, adding 100ml massfraction is respectively 0, 2%, 4%, 6%, 8%, 10%, the NaCl solution of 15%, respectively at 30 DEG C, 40 DEG C, 50 DEG C, at 60 DEG C of temperature, to vibrate in water bath with thermostatic control shaking table 24h with the rotating speed of 120r/min, after finally clean with deionized water rinsing, be placed in the baking oven dry for standby of 105 DEG C.

Test show that best modified condition is the NaCl solution of 6%, the NaCl solution best results of every 15g natural zeolite consumption 100mL at the temperature of 30 DEG C, simultaneously at matching zeolite in the adsorption test of ammonium nitrogen, modified zeolite adsorptive power under the same terms is better than natural zeolite, at temperature is 30 DEG C, single molecular layer saturated absorption improves more than 34%.

In order to perfection plays the advantage of modified natural zeolite, the present invention is controlling size, the regular shape of zeolite pulverizing, the contact polarity of zeolite granular surface property and nitrogenous fertilizer and modified zeolite particle is improved, by calcining natural zeolite stone, then pulverize, can obtain more regular, the talc particles that size is more homogeneous, carbonized by aerobic, some metal ion compounds in zeolite can be made to resolve into single oxide, are use Na by the cardinal principle of sodium chloride solution immersion treatment zeolite ⁺metal ion process in displacement zeolite, recycling NH ₄ ⁺na is replaced in conjunction with superiority with zeolite ⁺, finally realize adsorption process, the main component of zeolite comprises CaCO ₃, SiO ₂, Al ₂o ₃and H ₂o etc., the zeolite after calcined is easily broken to be decomposed, and the later stage enters in soil course for fertilizer easily decomposes, the ammonium nitrogen of release absorption.

Then at zeolite granular after NaCl solution modification, add certain density acid solution and eluriate zeolite granular, manufacture the surface property particle that shape is more concavo-convex, last at modified zeolite particle when ammonium nitrogen solution carries out Contact-sorption, condition is carried out in supersonic cleaning machine, ultrasonic vibration is conducive to eliminating ammonium nitrogen aqueous solution surface polarity, is conducive to abundant contact to each other.

Advantage of the present invention: the nitrogenous fertilizer of a kind of modified zeolite for adsorbing, slows down nitrogenous source rate of release, increases operation rate, protection of the environment save energy.

Embodiment

Embodiment 1:

A kind of absorption nitrogenous fertilizer of modified natural zeolite, it is characterized in that, be made up of the raw material of following weight part (Kg): natural zeolite 52,2mol/L rare HCl12,6wt%NaCl solution 160, ammonium chloride 100, urea 15, borax 6, chitin 4, attapulgite 30, clay 30 and appropriate water;

A preparation method for the absorption nitrogenous fertilizer of modified natural zeolite, is characterized in that, comprises following step:

(1) natural zeolite is first carried out preliminary pulverizing, become the bulk of 6 ~ 8cm diameter, then the high temperature kiln calcining 5 ~ 7h of 800 ~ 1000 DEG C is put in unification, and it is broken to carry out secondary fine fine powder after cooling, became the particle of 50 ~ 60 mesh sieves, finally rare HCl of particle pulvis 2mol/L was eluriated 2 ~ 3 times;

(2) granule of (1) gained is put into the NaCl solution of 6wt%, under the constant temperature of 30 DEG C, 140r/min stirs 18 ~ 20h, with deionized water drip washing 2 ~ 3 times after completing, and last dry for standby;

(3) ammonium chloride is added water to just in time dissolve completely, add the zeolite granular of (2) described modification, unifiedly put into supersonic cleaning machine, power 700 ~ 750W, temperature 30 DEG C, effect 2 ~ 2.5h;

(4) mixing urea, borax and other remaining component, is added in the total material described in (3), adds water in right amount and be modulated into homogenate, controls water content 45 ~ 60%, spray granulating finally by drum hot blast.

The absorption nitrogenous fertilizer of a kind of modified natural zeolite of the present invention is used for the fertilizer of rice cultivation, select 4 mu of rice terraces as experimental group, fertilizer of the present invention is used mainly to use fertilizer for during rice cultivation, 4 mu of paddy rice implantation methods routinely of control group uses common fertilizer, the control of other curing conditions and disease and pest is all identical, result shows the paddy rice of experimental group, the usage quantity of obvious minimizing fertilizer, arround lake pond water quality also do not receive pollution, the rice is doing well, realizes economic raising 14.1%.

Claims (2)

1. the absorption nitrogenous fertilizer of a modified natural zeolite, it is characterized in that, be made up of the raw material of following weight part: rare HCl10 ~ 15 of natural zeolite 50 ~ 55,2mol/L, 6wt%NaCl solution 150 ~ 180, ammonium chloride 80 ~ 100, urea 15 ~ 20, borax 6 ~ 10, chitin 2 ~ 4, attapulgite 30 ~ 35, clay 20 ~ 30 and appropriate water.

2. the preparation method of a kind of absorption nitrogenous fertilizer of modified natural zeolite according to claim 1, is characterized in that, comprise following step:

(1) natural zeolite is first carried out preliminary pulverizing, become the bulk of 6 ~ 8cm diameter, then the high temperature kiln calcining 5 ~ 7h of 800 ~ 1000 DEG C is put in unification, and it is broken to carry out secondary fine fine powder after cooling, became the particle of 50 ~ 60 mesh sieves, finally rare HCl of particle pulvis 2mol/L was eluriated 2 ~ 3 times;

(2) granule of (1) gained is put into the NaCl solution of 6wt%, under the constant temperature of 30 DEG C, 140r/min stirs 18 ~ 20h, with deionized water drip washing 2 ~ 3 times after completing, and last dry for standby;

(3) ammonium chloride is added water to just in time dissolve completely, add the zeolite granular of (2) described modification, unifiedly put into supersonic cleaning machine, power 700 ~ 750W, temperature 30 DEG C, effect 2 ~ 2.5h;

(4) mixing urea, borax and other remaining component, is added in the total material described in (3), adds water in right amount and be modulated into homogenate, controls water content 45 ~ 60%, spray granulating finally by drum hot blast.