Silicon phosphorus soil conditioner

A soil conditioner, silicon-phosphorus technology, applied in agriculture, fertilization equipment, applications, etc., can solve the problems of reduced phosphorus resource utilization, large phosphorus loss, environmental pollution, etc., achieve industrial application safety, simple preparation process, and reduce production cost effect

Pending Publication Date: 2022-07-22
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Except for a few rich ores that can be directly used as phosphorus chemical raw materials, most of the ores need to be purified. Since the lower the phosphorus grade, the greater the selection ratio when obtaining qualified concentrates, the greater the loss of phosphorus d

Method used

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  • Silicon phosphorus soil conditioner
  • Silicon phosphorus soil conditioner
  • Silicon phosphorus soil conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Use a certain phosphate rock with a phosphorus content of 20.6% and a phosphorus citric acid solubility rate of 8.2%, and pulverize it to a particle size of less than 2mm by conventional grinding means; use a planetary ball mill for fine grinding to obtain a phosphate rock powder of less than 0.15mm; The powder is mixed with quartz with a silicon content of 92% and a silicon citric acid dissolution rate of 0.04% at a mass ratio of 9:1, and the mixed material is ultra-finely ground by a planetary ball mill at a speed of 500r / min, a slurry concentration of 55%, and a time of 150min. After activation, a silicon-phosphorus soil conditioner with a phosphorus-citrate solubility rate of 65.1% and a silicon-citrate solubility rate of 25.8% was obtained.

Embodiment 2

[0027] Use a certain phosphate rock with a phosphorus content of 20.6% and a phosphorus citric acid solubility rate of 8.2%, and pulverize it to a particle size of less than 2mm by conventional grinding means; use a planetary ball mill for fine grinding to obtain a phosphate rock powder of less than 0.15mm; The powder is mixed with quartz with a silicon content of 92% and a silicon citric acid dissolution rate of 0.04% in a mass ratio of 8:2, and the mixed material is ultra-finely ground by a planetary ball mill at a speed of 500r / min, a slurry concentration of 55%, and a time of 150min. After activation, a silicon-phosphorus soil conditioner with a phosphorus-citrate solubility rate of 68.7% and a silicon-citrate solubility rate of 28.4% was obtained.

Embodiment 3

[0029] Use a certain phosphate rock with a phosphorus content of 20.6% and a phosphorus citric acid solubility rate of 8.2%, and pulverize it to a particle size of less than 2mm by conventional grinding means; use a planetary ball mill for fine grinding to obtain a phosphate rock powder of less than 0.15mm; The powder is mixed with quartz with a silicon content of 92% and a silicon citric acid dissolution rate of 0.04% at a mass ratio of 7:3, and the mixed material is ultra-finely ground by a planetary ball mill at a speed of 500r / min, a slurry concentration of 55%, and a time of 150min. After activation, a silicon-phosphorus soil conditioner with a phosphorus-citrate solubility rate of 72.5% and a silicon-citrate solubility rate of 33.9% was obtained.

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Abstract

The invention discloses a silicon-phosphorus soil conditioner, which is obtained by finely grinding phosphate ore with phosphorus content of about 20% into phosphate rock powder and then adding quartz sand with silicon content of about 90% for ultrafine grinding treatment by means of mechanical activation. According to the invention, the mixture of the ground phosphate rock and the quartz sand is subjected to high-energy grinding, so that the activation of the ground phosphate rock is promoted while the quartz sand is activated, and the content of citric acid-soluble silicon and phosphorus which are easily absorbed by plants in the product is greatly increased. The crystal structures of the phosphorite powder and the quartz sand which are activated by superfine grinding are destroyed, the reaction activity is improved, in the production process, chemicals do not need to be added, pollution and redundant impurities are not generated, the production efficiency is high, the cost is low, the operation is simple, and the method plays an important role in improving the utilization rate of phosphorite resources.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizers, and particularly relates to a silicon-phosphorus soil conditioner and a preparation method thereof. Background technique [0002] The total amount of phosphate rock resources in my country is abundant, but the distribution of phosphate rock resources is uneven. Most areas in the north are deficient in phosphorus and rely on the supply of Yunnan, Guizhou and Hubei, forming a situation of "south phosphorus transfer to the north and west phosphorus transfer to the east". Mainly with low-grade phosphate rock, the average grade of phosphorus content is less than 17%. The important use of phosphate rock resource is to produce phosphate fertilizer, and it is also an important non-renewable resource, which plays an important role in the national economy and ensuring the sustainable development of agriculture. effect. [0003] Except for a few rich ores that can be directly used as phosphorus ...

Claims

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Application Information

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IPC IPC(8): C05G1/00
CPCC05B17/00C05D9/00
Inventor 李国峰刘立伟张昆李营营栗艳峰赵礼兵
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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