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A kind of method for improving the appearance quality of common calcium phosphate

A calcium superphosphate and ordinary technology, applied in the field of improving the appearance quality of ordinary calcium superphosphate, can solve the problems of hardening, affecting the quality of fertilizers, and the failure of normal application of fertilizers, etc., to achieve the effect of ensuring product quality and reducing production costs

Active Publication Date: 2015-12-09
LINGSHAN JIAOFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In southern my country, under the influence of the rainy season, the free acid in ordinary calcium superphosphate can easily absorb moisture in the air. Using ordinary woven bags as packaging materials, short-term storage is likely to cause hardening, which not only leads to the failure of normal application of fertilizers, but also It also affects the quality of the fertilizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First, mix the matured common calcium superphosphate and white fertilizer in a weight ratio of 2:1, and stir evenly to obtain a semi-finished fertilizer; then mix the semi-finished fertilizer with kaolin in a weight ratio of 3:1, and Stir evenly to obtain finished fertilizer.

[0016] The white fertilizer is obtained by drying the industrial waste after the production of feed grade calcium hydrogen phosphate until the water content is 8%.

[0017] The water content of the matured common calcium superphosphate is 18%.

[0018] The water content of the semi-finished fertilizer is 13.2%.

Embodiment 2

[0020] First, mix the matured common calcium superphosphate and white fertilizer in a weight ratio of 3:2, and stir evenly to obtain a semi-finished fertilizer; then mix the semi-finished fertilizer with kaolin in a weight ratio of 4:1, and Stir evenly to obtain finished fertilizer.

[0021] The white fertilizer is obtained by drying the industrial waste residue after the production of feed grade calcium hydrogen phosphate until its water content is 10%.

[0022] The water content of the aged common calcium superphosphate is 19%.

[0023] The water content of the semi-finished fertilizer is 14%.

Embodiment 3

[0025] First, mix the matured common calcium superphosphate and white fertilizer in a weight ratio of 2.5:1.5, and stir evenly to obtain a semi-finished fertilizer; then mix the semi-finished fertilizer with kaolin in a weight ratio of 5:1, and Stir evenly to obtain finished fertilizer.

[0026] The white fertilizer is obtained by drying the industrial waste after the production of feed grade calcium hydrogen phosphate until the water content is 12%.

[0027] The water content of the aged common calcium superphosphate is 20%.

[0028] The water content of the semi-finished fertilizer is 14.8%.

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PUM

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Abstract

The invention discloses a method for enhancing appearance quality of ordinary superphosphate, which comprises the following steps: mixing aged ordinary superphosphate and a white fertilizer in a weight ratio of (2-3):(1-2), and stirring uniformly to obtain a semi-finished fertilizer; and mixing the semi-finished fertilizer with kaolin in a weight ratio of (3-5):1, and stirring uniformly to obtain the finished fertilizer product. By mixing the white fertilizer and ordinary superphosphate, citrate-soluble phosphorus and calcium biphosphate contained in the white fertilizer react with free acids in the ordinary superphosphate to lower the free acid content in the ordinary superphosphate.

Description

technical field [0001] The invention relates to the technical field of chemical fertilizer production, in particular to a method for improving the appearance quality of ordinary calcium superphosphate. Background technique [0002] Ordinary calcium superphosphate is a variety of fertilizers with a wide range of uses. The annual demand in the country has reached 8 million tons. The production process of ordinary calcium superphosphate adopts the box-type chemical synthesis method. After rapid mixing and reaction in the mixer, the slurry enters the aging tank for 8 hours of high-temperature aging to obtain a semi-finished product, and after 15 days of natural aging and water volatilization to obtain a finished product. [0003] In southern my country, under the influence of the rainy season, the free acid in ordinary calcium superphosphate can easily absorb moisture in the air. Using ordinary woven bags as packaging materials, short-term storage is likely to cause hardening, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05B21/00
Inventor 方南元
Owner LINGSHAN JIAOFENG CHEM