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Method for preparing secondary element water-soluble fertilizer by using mother liquor water-free method

A mother liquid and water-soluble technology, applied in the direction of inorganic fertilizers, calcium fertilizers, fertilizer mixtures, etc., can solve the problems of increasing the burden of drying steps due to moisture, environmental pollution, and difficult to handle, so as to improve fertilizer utilization, reduce energy consumption, quick results

Pending Publication Date: 2021-04-30
辽宁华昇金玛生态工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Both the patent and the prior art include a granulation step, and in order to ensure the effect of the granulation technology, it is necessary to adjust the humidity of the mixture by adding water, followed by a drying step to dry and evaporate the water; The burden on the subsequent drying steps is increased. In addition, sulfuric acid is added in the process of producing boric acid products for acid hydrolysis reaction. Finally, the mother liquor with sulfuric acid components produced in the centrifugation process of boric acid and magnesium sulfate is difficult to handle, and most of them are directly discharged. The incompletely extracted medium and trace elements in the mother liquor will also be wasted, and the centralized discharge of the mother liquor will cause the boron and sulfuric acid in the mother liquor to cause environmental pollution to the soil and rivers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of method utilizing mother liquid water-free method to prepare medium element water-soluble fertilizer, comprises the following steps:

[0035] Step 1. The boron-magnesium ore is crushed and ground by Raymond equipment into ore powder of more than 80 meshes. After putting the ore powder into the acid hydrolysis tank, 92.5% concentrated sulfuric acid is added. The weight ratio of the ore powder and concentrated sulfuric acid is 1:1, and Heat at 90°C for 4 hours to carry out acidolysis reaction;

[0036] Step 2. The acid hydrolyzed slurry is filtered through the plate frame to discard the acid mud, and the filtrate is sent to the crystallization tank to cool down, and the temperature is lowered to 30°C, and crystallized for 6.5 hours;

[0037] Step 3, the crystallized liquid is floated by flotation equipment, and the boric acid and magnesium sulfate solutions are separated by using different densities;

[0038] Step 4, crystallize through vacuum cooling, and then ...

Embodiment 2

[0044] A kind of method utilizing mother liquid water-free method to prepare medium element water-soluble fertilizer, comprises the following steps:

[0045] Step 1. The boron-magnesium ore is crushed and ground by Raymond equipment into ore powder of more than 80 meshes. After putting the ore powder into the acid hydrolysis tank, 92.5% concentrated sulfuric acid is added. The weight ratio of the ore powder and concentrated sulfuric acid is 1:1, and Heat it with steam at 105°C for 2 hours to carry out acidolysis reaction;

[0046] Step 2. The acid hydrolyzed slurry is filtered through the plate frame to discard the acid mud, and the filtrate is sent to the crystallization tank to cool down, and the temperature is lowered to 35°C, and crystallized for 6 hours;

[0047] Step 3, the crystallized liquid is floated by flotation equipment, and the boric acid and magnesium sulfate solutions are separated by using different densities;

[0048] Step 4, crystallize through vacuum cooli...

Embodiment 3

[0053] A kind of method utilizing mother liquid water-free method to prepare medium element water-soluble fertilizer, comprises the following steps:

[0054] Step 1. The boron-magnesium ore is crushed and ground by Raymond equipment into ore powder of more than 80 meshes. After putting the ore powder into the acid hydrolysis tank, 92.5% concentrated sulfuric acid is added. The weight ratio of the ore powder and concentrated sulfuric acid is 1:1, and Heat at 100°C for 1 hour to carry out acidolysis reaction;

[0055] Step 2. The acid hydrolyzed slurry is filtered through the plate frame to discard the acid mud, and the filtrate is sent to the crystallization tank to cool down, and the temperature is lowered to 33°C, and crystallized for 6.4 hours;

[0056] Step 3, the crystallized liquid is floated by flotation equipment, and the boric acid and magnesium sulfate solutions are separated by using different densities;

[0057] Step 4, crystallize through vacuum cooling, and then ...

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Abstract

The invention discloses a method for preparing a secondary element water-soluble fertilizer by using a mother liquor water-free method, the fertilizer is a full water-soluble secondary element water-soluble fertilizer, and the production method mainly uses a water-soluble magnesium fertilizer, water-soluble calcium and a mother liquor as adhesives to prepare the secondary element water-soluble fertilizer. Compared with the prior art, the method has the advantages that the mother liquor is used as an adhesive to replace the traditional water granulation process, the over-high moisture content of the product caused by the original water granulation process is reduced, the drying link is omitted, the energy consumption is reduced, the problem that the product is easy to harden is solved, and the mother liquor granulation enables medium and trace elements contained in the mother liquor to further improve the related content index of the product; meanwhile, the fertilizer has the advantages of high nutrient content, complete nutrition, good water solubility, high fertilizer efficiency and high utilization rate. The utilization rate of boron, magnesium and calcium can reach more than 40%.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a preparation method of a water-soluble fertilizer with medium elements. Background technique [0002] Water-soluble fertilizer is a multi-component compound fertilizer that can be completely and rapidly dissolved in water, and is more easily absorbed by crops, and its absorption and utilization rate is relatively high. Water-soluble fertilizers contain trace elements such as calcium, magnesium, sulfur, boron, zinc, iron, etc. required for crop growth. According to the scientific formula of the nutritional requirements required for crop growth, the fertilizer utilization rate can be increased by 1-2 times. Water-soluble fertilizers not only have a variety of formulations but also are very flexible in use. They can be used for drip irrigation, sprinkler irrigation, soilless cultivation and foliar fertilization, etc. [0003] Because water-soluble fertilizers have...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05G5/12C01B35/10
CPCC05D3/00C05G5/12C01B35/1045C05D5/00C05D9/02
Inventor 王汝刚徐赫廷杨林
Owner 辽宁华昇金玛生态工程有限公司
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