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A kind of preparation method of lightweight porous granular slow-release fertilizer

A technology of porous particles and slow-release fertilizers, applied in the form of fertilizers, inorganic fertilizers, fertilizer mixtures, etc., can solve the problems of unfavorable large-scale production, complex production processes, and low fertilizer efficiency, and achieve shortened preparation time, high strength, and fertilizer efficiency. long effect

Active Publication Date: 2016-08-24
广西丰岭肥业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the total amount of nutrients such as nitrogen, phosphorus, and potassium adsorbed on the surface of the sample is small, and the fertilizer efficiency of the fertilizer is low, and this process is not conducive to large-scale production, the production process is complicated, and the production cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the light porous granular slow-release fertilizer of the present invention comprises the following steps:

[0029] 1. Ingredients and forming

[0030] 1) Clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and the grid to obtain a clean waste CRT screen glass; break the clean waste CRT screen glass, and then use a glass with a diameter of less than 5mm Zirconia balls are used as the grinding medium for ball milling, and finally passed through a 300-600-mesh standard sieve to obtain CRT screen glass powder; among them, the mass ratio of zirconia balls to the clean waste CRT screen glass after crushing is controlled to be 2:1;

[0031] 2) According to mass percentage, 30-80% of CRT screen glass powder, 5-20% of potassium dihydrogen phosphate, 5-20% of dipotassium hydrogen phosphate, 2-20% of potassium sulfate, 5-40% of Tripotassium phosphate, 0.1-20% potassium chloride, 0.1-5%...

Embodiment 1

[0036] 1. Ingredients and molding:

[0037] 1) Clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and the grid to obtain a clean waste CRT screen glass; break the clean waste CRT screen glass, and then use a glass with a diameter of less than 5mm Zirconia balls are used as the grinding medium for ball milling, and finally passed through a 300-mesh standard sieve to obtain CRT screen glass powder; among them, the mass ratio of zirconia balls to broken clean waste CRT screen glass is 2:1;

[0038] 2) By mass percentage, 30% of CRT screen glass powder, 20% of potassium dihydrogen phosphate, 10% of dipotassium hydrogen phosphate, 10% of potassium sulfate, 20% of tripotassium phosphate, 2% of potassium chloride , 2% of zinc dihydrogen phosphate, 2% of diammonium phosphate and 4% of ammonium dihydrogen phosphate are put into a V-shaped strong mixer and mixed until the uniformity is greater than 98% to form a batc...

Embodiment 2

[0044] 1. Ingredients and molding:

[0045] 1) Clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and the grid to obtain a clean waste CRT screen glass; break the clean waste CRT screen glass, and then use a glass with a diameter of less than 5mm Zirconia balls are used as the grinding medium for ball milling, and finally passed through a 400-mesh standard sieve to obtain CRT screen glass powder; among them, the mass ratio of zirconia balls to broken clean waste CRT screen glass is 2:1;

[0046] 2) By mass percentage, 40% of CRT screen glass powder, 10% of potassium dihydrogen phosphate, 10% of dipotassium hydrogen phosphate, 10% of potassium sulfate, 25% of tripotassium phosphate, and 3% of potassium chloride , 1% zinc dihydrogen phosphate, 0.5% diammonium hydrogen phosphate, 0.4% ammonium dihydrogen phosphate and 0.1% manganese oxide are placed in a V-shaped strong mixer, and mixed until the uniformity is...

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PUM

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Abstract

The invention discloses a method for preparing a light porous particle controlled release fertilizer. The method comprises the following steps: uniformly mixing CRT screen glass powder, 5-20 percent of monopotassium phosphate, dipotassium phosphate, potassium sulfate, tripotassium phosphate, potassium chloride, zinc dihydrogen phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, cobalt oxide and manganese oxide, pressing, molding, feeding the mixture into a roller kiln at the temperature of 650-660 DEG C, and preserving the temperature to be 780-790 DEG C for 15-30 minutes; and reducing the temperature to be 50-80 DEG C or below at a rate of 100-200 DEG C per minute, thereby obtaining the light porous particle controlled release fertilizer. The light porous particle controlled release fertilizer prepared by the invention can be widely applied to the fields of indoor horticulture, urban gardening, street planting and farmlands. The preparation process is simple in operating process and low in cost, the production cost of the controlled release fertilizer can be effectively reduced, the environment is protected, wastes are changed into valuable materials, and the light porous particle controlled release fertilizer is suitable for large-scale industrial production and has obvious economic benefits and environmental protection benefits.

Description

technical field [0001] The invention relates to a manufacturing method of a slow-release fertilizer, in particular to a preparation method of a light porous granular slow-release fertilizer. technical background [0002] China is a big country in the production and consumption of household electrical appliances. At present, China has entered the peak period of TV and computer replacement, and the annual elimination will reach more than 6 million sets, accounting for 55-65% of the total weight of the cathode ray tube (CRT). ) urgently need to find a suitable resource-based solution. Especially lead-free screen glass in CRT, if it is not recycled, it will not only occupy land, but also waste resources. How to turn discarded screen glass into treasure has become an urgent problem to be solved. [0003] Lian Huihui et al. (Lian Huihui, Yuan Wenyi, Wu Xiaoyang, et al. Using waste CRT screen glass as raw material to prepare foam glass [J]. Chinese Journal of Environmental Enginee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/00
CPCC05B7/00C05G3/00C05B17/00C05D1/02C05D9/00
Inventor 郭宏伟王宇飞付锦锐殷海荣莫祖学刘盼
Owner 广西丰岭肥业有限公司