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Method for preparing active silicon@active humic acid composite fertilizer from inferior coal, and composite fertilizer obtained by using same

A technology of active humic acid and compound fertilizer, which is applied in the field of compound fertilizers containing active silicon and active humic acid, can solve the problems of low content of silicate ions of active components, complicated operation, low extraction rate, etc., and achieves easy dissolution. and dispersion, to meet the requirements of use, the effect of atomic economy is good

Active Publication Date: 2019-04-02
宁夏然尔特工业产业研究院(有限公司)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the foliar fertilizer obtained by this invention can combine humic acid and silicon fertilizer, and improve the extraction rate of humic acid in weathered coal, in this method, the amount of water added is 30-50 times that of weathered coal and it needs to be heated It takes a long time to react at about 80°C; it needs to be separated by filtration to obtain liquid fertilizer, which is not only cumbersome to operate and consumes a lot of energy; moreover, in the obtained product, the content of active components such as fulvic acid and silicate ion is relatively low. Low, directly increases the preparation cost and use cost of fertilizer
In addition, this method has a low extraction rate for low-quality coal with a humic acid content of less than 55%, poor product quality and unsatisfactory use effects, etc., making it difficult to popularize and apply; it also makes the humic acid extraction technology that uses coal as raw material so far and product application development are severely constrained

Method used

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  • Method for preparing active silicon@active humic acid composite fertilizer from inferior coal, and composite fertilizer obtained by using same
  • Method for preparing active silicon@active humic acid composite fertilizer from inferior coal, and composite fertilizer obtained by using same

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Take the weathered coal produced in a certain place as sample 1, and test its humic acid (referred to as HA) mass percentage content of 45%, and fulvic acid (referred to as FA) content of 4.0%. After passing sample 1 through a 5-mesh sieve, weigh 10.0g and place it in a grinder, add 0.1g sodium persulfate, and carry out grinding reaction at room temperature for 5-10 minutes; then add 9g sodium silicate in three portions, each time adding silicon After sodium sulfate is ground for 5-20 minutes, a solid compound fertilizer containing active humic acid-active silicon is obtained.

[0040] The compound fertilizer was tested for water solubility and humic acid content in the aqueous solution. The test method is as follows: Take 1g of the above compound fertilizer and add it to a test tube containing 7ml of tap water in 3 times. Stir evenly to observe its dissolution, dispersion and sedimentation. The content of humic acid and fulvic acid is tested according to the national stan...

Embodiment 2

[0054] The weathered coal produced in another place was taken as sample 2, and the mass percentage content of humic acid was tested to be 61%. The preparation method of the compound fertilizer was the same as that in Example 1.

[0055] The results showed that the extraction rate of total humic acid in weathered coal was 87.1% based on the extraction amount of water-soluble sodium humate. The mass content of humic acid in the obtained compound fertilizer is about 48.0%, and the content of active fulvic acid is 16.0%. Compared with the water-phase heating extraction method described in Comparative Example 1, the extraction rate of total humic acid is about 13% higher, and the extraction rate of fulvic acid is about 30% higher. If the aqueous caustic soda extraction method described in Comparative Example 2 is used, the extraction rate of humic acid is 32.7%, and the content of fulvic acid is 6.0%. It shows that the method provided by the present invention can significantly increa...

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Abstract

The invention provides a method for preparing an active silicon@active humic acid composite fertilizer from inferior coal, and the active silicon@active humic acid composite fertilizer prepared by using the same. The method comprises the following steps: crushing the inferior coal, successively adding an oxidizing agent and water-soluble silicate, and carrying out grinding so as to obtain a composite fertilizer. According to the invention, the method does not use water as a solvent, so the effect of saving water and energy is significant; meanwhile, the extraction rate of a humic acid component in the inferior coal and the yield of a product are significantly improved; the product is easily dissolved and dispersed in water; and the use requirements of facility agriculture for a foliar silicon fertilizer or a flush silicon fertilizer are effectively met. The method provided by the invention has strong adaptability to inferior coal raw materials with different sources, is extensively-available in raw materials, prominent in atomic economy and low in processing and manufacturing cost, and has the product facilitating promotion and utilization.

Description

Technical field [0001] The invention relates to the technical field of compound fertilizers, in particular to a method for preparing active silicon@active humic acid compound fertilizer from low-quality coal, and a compound fertilizer containing active silicon and active humic acid obtained by the method. Background technique [0002] As we all know, nitrogen, phosphorus, and potassium are the three essential nutrient elements for crops, and silicon as an important medium element for crop growth, its application in agriculture has received increasing attention at home and abroad. For example, 70%-80% of the farmland in Japan has been applied with silicon fertilizer, and the area using silicon fertilizer in South Korea, the United States, Australia, and Taiwan has reached more than 50%. Silicon fertilizer is the fourth element in addition to nitrogen, phosphorus and potassium. It cannot replace compound fertilizer, but it can balance the absorption of nitrogen, phosphorus and pota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05D9/00C05F11/04C05G3/80
Inventor 刘万毅刘睿波曹国阳
Owner 宁夏然尔特工业产业研究院(有限公司)
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