Method for dyeing phosphorus complex fertilizer

A dyeing agent and phosphoric acid technology, applied in fertilizer forms, fertilization devices, fertilizer mixtures, etc., can solve problems such as uneven coloring of products, influence of total nutrients in products, and large amount of colorants, so as to achieve good appearance and improve external quality. , the effect of reducing the cost of sales

Inactive Publication Date: 2008-08-06
云南云天化国际化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing domestic brown coloring technology is mainly concentrated in the "COSCO" group and the "Kao" company, but from the research on the coloring samples provided by them, there are the following shortcomings: the amount of colorant is too large, generally 5-7 / 1000, the cost of coloring is high, it is inconvenient to add in the production of diammonium, the coloring of the product is uneven, it will produce mixed flowers, and it will have a certain impact on the total nutrients of the product, and will cause secondary pollution to the environment, which needs to be degraded, and There is also a small amount of miscellaneous phenomenon

Method used

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  • Method for dyeing phosphorus complex fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The process of the monoammonium phosphate dyeing method of the present invention is to pour 25kg of dye into a storage tank, add water at room temperature to prepare a 5 / 100 solution, and when the liquid level reaches 50-60%, start the mechanical stirrer and stir. After homogenization, turn on the metering pump to send the colorant to the pipeline at the inlet of the concentrated phosphoric acid pump, or add 25kg of the colorant directly to the concentrated phosphoric acid tank in proportion, and pump it into the granulation kiln or pre-neutralization tank through the acid pump. The materials are mixed for spray granulation, and the product is dyed. The amount of colorant added per ton of product is 3 to 5 / 10000.

Embodiment 2

[0024] In the method for dyeing with diammonium phosphate of the present invention, the process flow is to pour 25kg of dye into a storage tank, add water at room temperature to prepare a 5 / 100 solution, and when the liquid level reaches 50-60%, start the mechanical stirrer and stir After homogenization, turn on the metering pump to send the colorant to the pipeline at the inlet of the concentrated phosphoric acid pump, or add 25kg of the colorant directly to the concentrated phosphoric acid tank in proportion, and pump it into the granulation kiln or pre-neutralization tank through the acid pump. The materials are mixed for spray granulation. To dye the product, the amount of colorant added per ton of product is 5-7.5 / 10000.

Embodiment 3

[0026] In the method for dyeing high-concentration phosphate compound fertilizer with potassium diammonium, the process flow is to pour 25 kg of dye into a storage tank, add water at room temperature to prepare a 5 / 100 solution, and wait until the liquid level reaches 50-60%. Start the mechanical agitator and stir evenly, then turn on the metering pump to send the colorant to the pipeline at the inlet of the concentrated phosphoric acid pump, or add 25kg of the colorant directly to the concentrated phosphoric acid tank in proportion, and pump it into the granulation kiln or pre-treatment by the acid pump. In the neutralization tank, mix with the materials for spray granulation and dye the product. The amount of colorant added per ton of product is 7.5-10 / 10000.

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Abstract

The invention relates to a method for processing chemical fertilizer, in particular to a method for dyeing chemical fertilizer. The invention includes the preparation, addition, dyeing, and granulation of colorant, and comprises the following steps: A. adding weighted colorant into a phosphoric acid tank, an acid pump outlet or a pre-neutralization slot for producing phosphate compound fertilizer; B. mixing water solution with phosphate compound fertilizer for dyeing; C. spraying the slurry for granulation after dyeing. The method for dyeing chemical fertilizer is mainly used for appearance dyeing of various nitrogen and phosphate fertilizers and products, and can dye coffee on products evenly and effectively. The dyed products with high-quality appearance color do not have discoloration and color change so as to hit the target of unifying product color. Compared with that imported from America, diammonium phosphate dyed through the method for dyeing chemical fertilizer has the equal and even better color. As coffee color products sell well in the market, the invention can reduce sales cost.

Description

Technical field [0001] The invention relates to a method for processing chemical fertilizers, in particular to a method for dyeing chemical fertilizers. Background technique [0002] Our country's phosphate compound fertilizer products are produced with phosphate rock as raw material and wet-process phosphoric acid. In the process of phosphate compound fertilizer production, due to the unstable quality of phosphate rock, the quality of phosphoric acid fluctuates greatly, and the content of impurities varies, which directly affects the appearance and color of diammonium phosphate products, which are yellow, off-white, white and green. Colors such as white, transparent and black, especially when there are fewer and fewer high-grade phosphate rock in the future, due to the decline in the quality of phosphate rock resources, the color of the product is more unstable, which leads to a decline in the competitiveness of the product in the market and even by farmers Misunderstood as poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 何春云张敏尚建松莫志强王亚
Owner 云南云天化国际化工有限公司
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