CN112745158A - Method for producing compound fertilizer by using phosphated slag - Google Patents
Method for producing compound fertilizer by using phosphated slag Download PDFInfo
- Publication number
- CN112745158A CN112745158A CN202011623456.5A CN202011623456A CN112745158A CN 112745158 A CN112745158 A CN 112745158A CN 202011623456 A CN202011623456 A CN 202011623456A CN 112745158 A CN112745158 A CN 112745158A
- Authority
- CN
- China
- Prior art keywords
- slag
- phosphated
- compound fertilizer
- urea
- phosphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B15/00—Organic phosphatic fertilisers
Abstract
The invention discloses a method for producing compound fertilizer by using phosphated slag, which comprises the following steps of (1) removing impurities from the collected phosphated slag; (2) crushing phosphated slag; (3) adding urea, sulfuric acid and water into a reaction kettle, and stirring until the urea is completely dissolved; (4) adding the crushed phosphated residues into a reaction kettle; (5) and (5) carrying out liquid-solid separation and drying to obtain the compound fertilizer. The invention has the following technical effects that the hazardous wastes of the phosphorization slag are utilized, the wastes are changed into valuables, and the problem of environmental pollution caused by the discharge of the phosphorization slag is solved; the main components of the phosphorization slag are zinc phosphate and iron phosphate, sulfuric acid and urea, zinc phosphate and iron phosphate are subjected to chemical reaction to synthesize urea sulfate and urea phosphate, the urea sulfate and the urea phosphate have the capability of chelating metal elements such as iron, zinc and the like, the iron and zinc elements in the phosphorization slag can be chelated, the obtained compound fertilizer contains nitrogen, sulfur, iron and zinc nutrient elements, and various trace elements such as potassium, calcium, magnesium, manganese and the like can be added.
Description
Technical Field
The invention relates to a method for preparing a compound fertilizer
Background
Phosphating is a common surface treatment technology and is widely applied to industries such as automobiles, chemical engineering, ships, steel wire ropes, aerospace, household appliances and the like. The sediment material that produces among the bonderizing process is the bonderizing sediment, belongs to solid dangerous waste material, and the waste classification is: HW17 surface treats waste, the waste code being: 346-064-17, whose composition was assayed to contain Fe (+3), Zn (+2), PO4(-3)%; in the past, the slag is discarded or discharged along with water, thereby causing environmental pollution.
Disclosure of Invention
The invention aims to provide a method for producing a compound fertilizer by using phosphated slag.
The technical proposal of the invention is that a method for producing compound fertilizer by using phosphated slag,
(1) removing impurities from the collected phosphated slag;
(2) crushing phosphated slag;
(3) adding urea, sulfuric acid and water into a reaction kettle, and stirring until the urea is completely dissolved;
(4) adding the crushed phosphated residues into a reaction kettle;
(5) and (5) carrying out liquid-solid separation and drying to obtain the compound fertilizer.
The phosphated residue is crushed to be more than or equal to 300 meshes.
The mass ratio of urea to sulfuric acid to water is 3.5: 1: 0.5, and the reaction temperature is 50-70 ℃.
Adding the crushed phosphated residues into a reaction kettle, wherein the liquid-solid ratio is 3: 1, and the reaction temperature is 50-70 ℃.
The water content of the compound fertilizer is controlled to be less than or equal to 5 percent.
Adding potassium, calcium, magnesium and manganese elements into the compound fertilizer.
The invention has the following technical effects that the hazardous wastes of the phosphorization slag are utilized, the wastes are changed into valuables, and the problem of environmental pollution caused by the discharge of the phosphorization slag is solved; the main components of the phosphorization slag are zinc phosphate and iron phosphate, sulfuric acid and urea, zinc phosphate and iron phosphate are subjected to chemical reaction to synthesize urea sulfate and urea phosphate, the urea sulfate and the urea phosphate have the capability of chelating metal elements such as iron, zinc and the like, the iron and zinc elements in the phosphorization slag can be chelated, the obtained compound fertilizer contains nitrogen, sulfur, iron and zinc nutrient elements, and various trace elements such as potassium, calcium, magnesium, manganese and the like can be added.
Detailed Description
A method for producing a compound fertilizer by using phosphated slag,
(1) removing impurities from the collected phosphated slag;
(2) crushing the phosphorization slag to more than or equal to 300 meshes;
(3) adding urea, sulfuric acid and water into a reaction kettle, wherein the mass ratio of the urea to the sulfuric acid to the water is 3.5: 1: 0.5, stirring until the urea is completely dissolved, and reacting at the temperature of 50-70 ℃;
(4) adding the crushed phosphated residues into a reaction kettle, wherein the liquid-solid ratio is 3: 1, and the reaction temperature is 50-70 ℃;
(5) and (3) carrying out liquid-solid separation and drying, and controlling the water content to be less than or equal to 5% to obtain a compound fertilizer, wherein the obtained compound fertilizer contains nitrogen, sulfur, iron and zinc nutrient elements.
Potassium, calcium, magnesium and manganese elements can also be added into the compound fertilizer, and the obtained compound fertilizer contains nutrient elements of nitrogen, sulfur, iron, zinc, potassium, calcium, magnesium and manganese elements.
Claims (6)
1. A method for producing compound fertilizer by using phosphated slag is characterized in that:
(1) removing impurities from the collected phosphated slag;
(2) crushing phosphated slag;
(3) adding urea, sulfuric acid and water into a reaction kettle, and stirring until the urea is completely dissolved;
(4) adding the crushed phosphated residues into a reaction kettle;
(5) and (5) carrying out liquid-solid separation and drying to obtain the compound fertilizer.
2. The method for producing the compound fertilizer by using the phosphated slag as claimed in claim 1, which is characterized in that: the phosphated residue is crushed to be more than or equal to 300 meshes.
3. The method for producing the compound fertilizer by using the phosphated slag as claimed in claim 1, which is characterized in that: the mass ratio of urea to sulfuric acid to water is 3.5: 1: 0.5, and the reaction temperature is 50-70 ℃.
4. The method for producing the compound fertilizer by using the phosphated slag as claimed in claim 1, which is characterized in that: adding the crushed phosphated residues into a reaction kettle, wherein the liquid-solid ratio is 3: 1, and the reaction temperature is 50-70 ℃.
5. The method for producing the compound fertilizer by using the phosphated slag as claimed in claim 1, which is characterized in that: the water content of the compound fertilizer is controlled to be less than or equal to 5 percent.
6. The method for producing the compound fertilizer by using the phosphated slag as claimed in claim 1, which is characterized in that:
adding potassium, calcium, magnesium and manganese elements into the compound fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011623456.5A CN112745158A (en) | 2020-12-31 | 2020-12-31 | Method for producing compound fertilizer by using phosphated slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011623456.5A CN112745158A (en) | 2020-12-31 | 2020-12-31 | Method for producing compound fertilizer by using phosphated slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112745158A true CN112745158A (en) | 2021-05-04 |
Family
ID=75650391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011623456.5A Pending CN112745158A (en) | 2020-12-31 | 2020-12-31 | Method for producing compound fertilizer by using phosphated slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112745158A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277905A (en) * | 2021-05-27 | 2021-08-20 | 吉林大学 | Method for preparing fertilizer from phosphated residue, phosphated residue fertilizer and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976851A (en) * | 2017-05-21 | 2017-07-25 | 石家庄学院 | A kind of method that utilization phosphatization slag prepares ferric phosphate and APP fertilizer |
-
2020
- 2020-12-31 CN CN202011623456.5A patent/CN112745158A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976851A (en) * | 2017-05-21 | 2017-07-25 | 石家庄学院 | A kind of method that utilization phosphatization slag prepares ferric phosphate and APP fertilizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277905A (en) * | 2021-05-27 | 2021-08-20 | 吉林大学 | Method for preparing fertilizer from phosphated residue, phosphated residue fertilizer and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210504 |
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| WD01 | Invention patent application deemed withdrawn after publication |