Special modified calcium carbonate for caking prevention of fertilizer and preparation method of modified calcium carbonate

A calcium carbonate and anti-caking technology, which is applied in the fields of application, organic fertilizers, inorganic fertilizers, etc., can solve the problems of poor powder modification effect, large amount of anti-caking agent, and increased fertilizer costs, etc., to achieve inhibition of diffusion, contact Effects of Angle Enlargement, Lifting Wrapping and Modification Effects

Inactive Publication Date: 2018-11-06
贵州紫云月华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, only the surface active agent is used in combination with inorganic powder, which has the problems of poor modification effect of the powder and aggravated powder agglomeration, which leads to a large amount of anti-caking agent and increases the cost of chemical fertilizers

Method used

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  • Special modified calcium carbonate for caking prevention of fertilizer and preparation method of modified calcium carbonate
  • Special modified calcium carbonate for caking prevention of fertilizer and preparation method of modified calcium carbonate
  • Special modified calcium carbonate for caking prevention of fertilizer and preparation method of modified calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After crushing, grinding and grading natural marble to obtain 1000-mesh calcium carbonate; 65% of 1000-mesh calcium carbonate is first stirred with 22% liquid paraffin at high speed and constant temperature for 2 hours, that is, primary modified calcium carbonate is obtained by dry mixing; Then 10% water-soluble natural polysaccharide is dissolved in hot water at 50°C to obtain a 20wt% water-soluble natural polysaccharide solution, and further the primary modified calcium carbonate, 20wt% water-soluble natural polysaccharide solution, and 3% surfactant are added in sequence Go to the ball milling equipment with heat preservation device, and wet ball mill for 3 hours under the heat preservation condition of 50°C; finally, after drying, depolymerization, and packaging processes, the modified calcium carbonate specially used for anti-caking of chemical fertilizers is obtained.

[0018] The indicators of the special modified calcium carbonate for preventing caking of chemica...

Embodiment 2

[0028] After the natural marble is crushed, ground and classified to obtain 1000 mesh calcium carbonate; 55% of the 1000 mesh calcium carbonate is first stirred with 25% liquid paraffin at high speed and constant temperature for 3 hours, that is, the primary modified calcium carbonate is obtained by dry mixing; Then 15% water-soluble natural polysaccharide is dissolved in hot water at 60°C to obtain a 25wt% water-soluble natural polysaccharide solution, and the primary modified calcium carbonate, 25wt% water-soluble natural polysaccharide solution, and 5% surfactant are added in sequence Go to the ball milling equipment with heat preservation device, and wet ball mill for 5 hours under the heat preservation condition of 60°C; finally, after drying, depolymerization, and packaging processes, the modified calcium carbonate specially used for anti-caking of chemical fertilizers is obtained.

[0029] The indicators of the special modified calcium carbonate for preventing caking of ...

Embodiment 3

[0039]After crushing, grinding and grading natural marble to obtain 1000-mesh calcium carbonate; 60% of 1000-mesh calcium carbonate is first stirred with 23% liquid paraffin at high speed and constant temperature for 2.3 hours, that is, primary modified calcium carbonate is obtained by dry mixing Then 13% water-soluble natural polysaccharide is dissolved in 53 ℃ of hot waters, obtains 22wt% water-soluble natural polysaccharide solution, further described primary modified calcium carbonate and 22wt% water-soluble natural polysaccharide solution, 4% tensio-active agent Add it to the ball milling equipment with heat preservation device, and wet ball mill for 4 hours under the heat preservation condition of 53°C; finally, after drying, depolymerization, and packaging processes, the modified calcium carbonate specially used for anti-caking of chemical fertilizers is obtained.

[0040] The indicators of the special modified calcium carbonate for preventing caking of chemical fertiliz...

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Abstract

The invention discloses special modified calcium carbonate for caking prevention of fertilizer and a preparation method of modified calcium carbonate. For modified calcium carbonate, D99 is smaller than or equal to 13 mu m, D90 is smaller than or equal to 12 mu m, D75 is smaller than or equal to 10 mu m, and modified calcium carbonate is prepared from 55%-70% of calcium carbonate, 10%-15% of water-soluble natural polysaccharide, 20%-25% of liquid paraffin and 3-5% of a surfactant. The preparation method of modified calcium carbonate comprises the following steps: natural marble is crushed, ground and graded, and calcium carbonate is obtained; primary modified calcium carbonate is obtained by dry blending with liquid paraffin firstly; then primary modified calcium carbonate is subjected towet ball milling with water-soluble natural polysaccharide and the surfactant; finally, drying, depolymerization and packaging are performed, and special modified calcium carbonate for caking prevention of the fertilizer is obtained. Special modified calcium carbonate, prepared with the method, for caking prevention of the fertilizer has the characteristics of being low in cost, environmentally friendly and efficient, the lowest caking rate can reach 11.5% when adding amount is 0.06%, the caking prevention effect is remarkable, fertilizer quality is improved on the basis of the conventional fertilizer products, and modified calcium carbonate has broad market prospect.

Description

technical field [0001] The invention relates to a modified calcium carbonate specially used for anti-caking of chemical fertilizers and a preparation method thereof, and belongs to the technical field of powdery anti-caking agents. Background technique [0002] As a large agricultural country, it is an inevitable trend to develop towards agricultural modernization in the future. Manual fertilization will gradually change to mechanical fertilization, while chemical fertilizers need to be produced, stored and transported in large quantities. Higher requirements are placed on the quality and quality of chemical fertilizers to produce liquidity. Good fertilizer with uniform particle size is very critical. At present, the main problem of chemical fertilizers is the serious agglomeration phenomenon. It is generally believed that the factors affecting the agglomeration of chemical fertilizers mainly include internal factors and external factors: internal factors refer to the chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05D3/02C05G3/00C05G3/20C05F11/00
Inventor 蒋根杰李仕阳潘健陈文江郭太雷
Owner 贵州紫云月华新材料有限公司
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