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Granular mineral fertilizer and its production method

A mineral fertilizer, granular technology, applied in the direction of fertilization device, fertilizer mixture, application, etc., can solve the problem that granular fertilizer is not easy to disintegrate and reduce the content.

Inactive Publication Date: 2016-04-20
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the present invention has developed a kind of novel disintegrating agent---retrofit potassium-based bentonite, and this novel disintegrating agent not only has solved the difficult disintegrating problem of granular fertilizer, and does not reduce multi-element microporous mineral fertilizer (soil conditioner) The content of available potassium in the agent)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] For the preparation of multi-element microporous mineral fertilizer bulk semi-finished products, see the embodiment of the Chinese patent "Method for preparing multi-element microporous mineral fertilizer from silicate rock by hydrothermal chemical reaction" (Han Cheng, Liu Jianming; application number 200710178794.0) 2.

[0019] 1) Selection of raw materials, including potassium-containing rocks, lime and gypsum:

[0020] Potassium-containing silicate rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows

[0021] SiO 2

TiO 2

AlO 3

Fe 2 o 3 +FeO

MnO

CaO

MgO

K 2 o

Na 2 o

P 2 o 5

Loss on ignition

total

63.09

0.71

15.69

4.41

0.02

0.15

0.37

12.79

0.22

0.04

1.93

99.42

[0022] X-ray powder crystal diffraction analysis indicates that the potassium-bearing rock is mainly potassium feldspar, and the others ar...

Embodiment 2

[0031] The bentonite raw material used in the potassium modification treatment of bentonite is the bentonite mine produced in Ningcheng County, Inner Mongolia Autonomous Region, and its chemical composition (according to mass percent) is:

[0032]

[0033] Mix 30ml of saturated potassium sulfate or potassium chloride solution with 100g of bentonite at normal temperature, extrude in an extruder, air dry naturally, and then pulverize in a pulverizer to below 0.1mm. The chemical composition of bentonite modified by potassium sulfate or potassium chloride is:

[0034]

[0035] From the comparison of the above two tables, it can be seen that after modification with potassium sulfate or potassium chloride, the content of K element in bentonite increases to varying degrees.

Embodiment 3

[0037] (1) the multi-element microporous mineral fertilizer block semi-finished product of embodiment 1 is pulverized to below 0.1mm, and is transported to the material box (1) place for storage;

[0038] (2) the bentonite powder processed with potassium sulfate remodeling in embodiment 2 is put into material box (two) and deposits;

[0039] (3) Open the material box (1) and the material box (2) and transport the two materials to the screw mixer in a weight ratio of 94:6 to mix evenly;

[0040] (4) Transport the mixed material to the disc granulator, spray an appropriate amount of water, and granulate while rotating;

[0041] (5) Transport the granulated multi-element microporous mineral fertilizer (soil conditioner) to the dryer for drying;

[0042] (6) Cool the dried granular multi-element microporous mineral fertilizer to obtain the product.

[0043] (7) Take four parts of the granular product and put them into small beakers filled with water for the disintegration test. ...

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Abstract

The invention provides a granular mineral fertilizer and a method for producing the granular mineral fertilizer. The granular mineral fertilizer provided by the invention consists of 90-96wt% of a multielement microporous mineral fertilizer and 4-10wt% of potassium modified bentonite, wherein the content of potassium in the potassium modified bentonite is 2-15% based on proportion of K2O in chemical components of bentonite. The method for producing the granular mineral fertilizer comprises the following steps: mixing the multielement microporous mineral fertilizer with the potassium modified bentonite in a ratio of (90-96):(10-4); and granulating.

Description

technical field [0001] The invention belongs to the field of mineral fertilizer (soil conditioner) production, in particular to a granular mineral fertilizer containing modified bentonite and a production method thereof. Background technique [0002] Multi-element microporous mineral fertilizer (soil conditioner) is a new type of fertilizer (Han Cheng, Liu Jianming; Method for preparing multi-element microporous mineral fertilizer from silicate rock by hydrothermal chemical reaction, application number 200710178794.0). The electron micrograph of this fertilizer shows that its mineral components are micron, submicron (slightly smaller than micron size), microporous (pores between mineral components, pore size is also micron, submicron) structure development. After this new type of fertilizer is applied to the soil, on the one hand, it can supply the beneficial elements of the soil and supplement the soil fertility; on the other hand, it can also regulate and improve the phys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
Inventor 刘善科韩成刘建明
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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