CN1178780A - Multiple element composite fertilizer and its preparing method - Google Patents
Multiple element composite fertilizer and its preparing method Download PDFInfo
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- CN1178780A CN1178780A CN 97103558 CN97103558A CN1178780A CN 1178780 A CN1178780 A CN 1178780A CN 97103558 CN97103558 CN 97103558 CN 97103558 A CN97103558 A CN 97103558A CN 1178780 A CN1178780 A CN 1178780A
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Abstract
Metallurgical dregs is first treated to eliminate iron, crushed and acid treated, and then mixed with N, P and K elements or Fe and Zn elements to produce multiple element composite fertilizer. The said multiple element composite fertilizer has nutritigve components easy to absorb by plant and is suitable for slightly alkali soil and slightly acid soil.
Description
The present invention belongs to the field of fertilizer production, and is especially one kind of multielement composite fertilizer and its production process.
The treatment of metallurgical solid waste is a long-term concern of people, at present, people at home and abroad use metallurgical slag to manufacture fertilizer, the Su Union patent Su 150427 adds phosphate ore at the temperature of 1200 ℃ of molten slag, and the Brazilian patent BR 8903714 adds phosphorus, silicon, magnesium and potassium at the temperature of 1200 ℃ of molten slag to manufacture fertilizer. Japanese patent J50627717 and British patent GB 1179246 disclose that fertilizer components are added in smelting to prepare fertilizers, the chemical treatment on metallurgical slag is not carried out in the methods, and most of the fertilizers belong to the molecular structure of portland cement and are not easily absorbed by plants. In order to overcome the above disadvantages, the metallurgical slag is treated with acid to prepare fertilizer. For example, Japanese patent J01168791 discloses a lawn soil improving material, which is prepared by adding acidic materials and fertilizers into converter slag as main raw materials, wherein the acidic materials are nitric acid, hydrochloric acid, sulfuric acid, citric acid and the like, the fertilizers are nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers, fish meal and bone meal, and a small amount of polyethylene methanol cellulose, carboxylic acid methanol cellulose and the like are added during the preparation. Has the defects of high cost, alkalinity, unsuitability for alkaline soil, availability of converter slag and single raw material.
The invention aims to provide a multi-element compound fertilizer which has low cost and wide raw materials and is suitable for slightly alkaline or slightly acidic soil and a preparation method thereof.
The present invention uses metallurgical slag as basic material, and through mechanical processing, acidification treatment and addition of N, P and K elements or Fe and Zn elements, multielement composite fertilizer is produced.
The reaction principle of the metallurgical slag after acidification treatment is as follows:
therefore, the silicon, the calcium, the magnesium and the salt are changed into soluble salts which are easy to be absorbed by plants, the fertilizer efficiency is increased, and meanwhile, the iron, the manganese, the copper, the zinc, the boron, the vanadium and the like are also released from interstitial solid solutions, and the reaction is as follows:
thus, the trace elements in the metallurgical slag become effective plant nutrient components.
The multi-element compound fertilizer comprises the following components (by weight percentage):
the composition is as follows: the composition is two:
46-55% of metallurgical slag and 46-55% of metallurgical slag
20-26% of urea and 28-35% of inorganic iron salt
14 to 21 percent of diammonium phosphate and 14 to 22 percent of inorganic zinc salt
3 to 9 percent of potassium chloride
The metallurgical slag as described above may be converter slag, open-hearth slag, blast furnace slag, fly ash.
The diammonium phosphate as described above may be replaced by monoammonium phosphate, calcium phosphate or superphosphate.
The potassium chloride can be replaced by potassium oxide, potassium sulfate, and potassium nitrate.
The inorganic iron salt is ferric nitrate, ferric sulfate, ferric chloride or ferrous ammonium sulfate.
The inorganic zinc salt as described above is zinc sulfate, zinc nitrate, zinc oxide.
The preparation method comprises the following steps:
removing iron from metallurgical slag, crushing into 80-100 meshes, adding acid accounting for 40-60% of the total amount of the metallurgical slag, stirring for reaction for 3-5 minutes, controlling the pH value of liquid to be 5.0-6.0, carrying out blank sealing for 1-2 days, taking out materials, drying at the temperature of 30-40 ℃, adding the required materials according to the components, uniformly mixing, and crushing into 80-100 meshes to obtain a qualified product.
The acid as described above may be spent sulfuric acid, sulfuric acid; waste nitric acid and nitric acid; waste phosphoric acid, phosphoric acid.
Theinvention has the following advantages:
1. the nutrient components of the fertilizer are easy to be absorbed by plants.
2. The raw material source is wide.
3. The cost is low.
4. Simple process and no waste.
5. The application range is wide, and the method is suitable for alkaline soil and acidic soil.
The preferred embodiment of the present invention is as follows:
example 1
Deironing and crushing converter slag into 80-100 meshes, adding waste sulfuric acid and sulfuric acid accounting for 40% of the total amount of slag, stirring and reacting for 5 minutes, controlling the pH value of liquid to be 5.0, then carrying out slag sealing for 2 days, taking out the slag, drying at the temperature of 30-40 ℃, uniformly mixing and crushing into 80-100 meshes according to the proportion of 47% of slag, 26% of urea, 19% of diammonium phosphate and 8% of potassium chloride to obtain a qualified product, wherein the effective content (weight percentage) of the product is 33.47%, wherein N is 16.71, P is 16.78%, and the effective content (weight percentage) of the product is2O5％＝11.70，K2O％＝5.05。
Example 2
The mixture ratio is changed into 49 percent of slag, 26 percent of urea, 21 percent of diammonium phosphate and 4 percent of potassium chloride, and the rest is the same as the embodiment 1. The effective content of the product is 32.72 percent, wherein N percent is 17.26 percent, P2O5 percent is 12.94 percent, and K2O percent is 2.25 percent.
Example 3
The converter slag is changed into open-hearth slag, the slag amount is 50 percent, the urea is 20 percent, the diammonium phosphate is 21 percent, the potassium chloride is 9 percent, the rest is the same as the embodiment 1, the effective content of the product is 30.48 percent, wherein, the N percent is 11.19 percent, and the P percent is 11.19 percent2O5％＝12.94，K2O％＝5.68。
Example 4
The process is carried out by changing waste sulfuric acid and sulfuric acid into nitric acid and changing pH into 5.5, changing the mixture ratio into slag 46%, ammonium nitrate 24%, superphosphoric calcium 21%, potassium nitrate 9%, and the rest is the same as example 1. The effective content is 25.21%, wherein N%2O5％＝11.83，K2O％＝3.72。
Example 5
The converter slag is changed into blast furnace slag, the total acid content is changed into 45 percent, the slag content is 50 percent, the urea content is 25 percent, the diammonium phosphate is 19 percent, the potassium chloride content is 6 percent, the rest is the same as the example 1, the effective content of the product is 29.44 percent, wherein, the N percent is 13.95, and the P percent is 13.952O5％＝11.71，K2O％＝3.79。
Example 6
The total amount of the added acid is changed to 55%, the stirring reaction is carried out for 3-5 minutes, the pH value of the liquid is controlled to be 5.8, the proportioning slag is 51%, the urea is 20%, the diammonium phosphate is 20%, the potassium chloride is 9%, and the rest is the same as the example 3. The effective content of the product is 29.74 percent, wherein N percent is 11.74 percent, and P2O5％＝12.32，K2O％＝5.68。
Example 7
The acid was changed to waste phosphoric acid and phosphoric acid, the total amount of the added acid was 60%, the pH of the liquid was controlled to 6.0, the proportioning residue was 55%, urea 21%, diammonium phosphate 16%, potassium chloride 8%, and the rest was the same as in example 5. The effective content of the product is 26.63 percent, wherein N percent is 11.73, and P2O5％＝9.86，K2O％＝5.05。
Example 8
The mixture ratio is changed into 53 percent of slag, 25 percent of urea, 16 percent of diammonium phosphate and 6 percent of potassium chloride, and the rest is the same as the embodiment 3. The effective content of the product is 27.27%, wherein N%2O5％＝9.87，K2O％＝3.79。
Example 9
The mixture ratio is changed into 46 percent of slag and FeSO4-7H2O 34％，ZnSO4-7H2O20%, the same as in example 1. The effective content of the product is 12.44%Wherein Fe% ═ 7.24, Zn% ═ 5.2
Example 10
The mixture ratio is changed into 47 percent of slag, 35 percent of iron salt and 18 percent of zinc salt, and the rest is the same as the example 1. The effective content of the product is 12.13 percent, wherein the Fe percent is 7.45 percent, and the Zn percent is 4.68 percent.
Example 11
The mixture ratio is changed into 48 percent of slag, 35 percent of iron salt and 17 percent of zinc salt, and the rest is the same as the example 4. The effective content of the product is 11.87%, wherein Fe% ═ 7.45 and Zn% ═ 4.42.
Example 12
The mixture ratio was changed to 51% of slag, 35% of iron salt and 14% of zinc salt, and the rest was the same as in example 5. The effective content of the product is 11.09%, wherein Fe% ═ 7.45 and Zn% ═ 3.64.
Example 13
The mixture ratio was changed to 53% of slag, 33% of iron salt and 19% of zinc salt, and the rest was the same as in example 6. The effective content of the product is 10.85%, wherein Fe% ═ 7.21%, Zn% ═ 3.64.
Example 14
The mixture ratio is changed into 55 percent of slag, 31 percent of ferric salt and 14 percent of zinc salt, and the rest is the same as the example 7. The effective content of the product is 10.24%, wherein Fe% ═ 6.60%, Zn% ═ 3.64.
The invention is applied to crops as follows:
| test field area | Area of test field | The crop yield is increased | Backup note |
| Huairen Jinsandbeach town Xinzhou Jieyuan Zhen Yu Zi Dong Yang Zhen Xiangfen Zhao Quxiang South county of Sichuan province Huairen Jinsandbeach town Yu Zi Dong Yang Zhen Xiangfen Zhao Quxiang Xiangfen Zhao Quxiang | 400 400 110 48 4 100 120 56 144 | Corn yield increase 19.9 Corn yield increase 16.2 Corn yield increase 15.9 Corn yield increase 12.3 Yield of rice is increased by 17.5 Beet 14.13 Onion 22.60 Peanut 57.90 17.30 Cotton | (1) Strong ability of resisting plant diseases and insect pests (2) Precocity for 3-8 days (3) South county of Sichuan province Large plateau area, eternal definition Zone, east dam zone |
Claims (10)
1. A multi-element compound fertilizer is characterized by comprising the following components in percentage by weight:
46-55% of metallurgical slag and 20-26% of urea
14 to 21 percent of diammonium phosphate and 3 to 9 percent of potassium chloride
2. A multi-element compound fertilizer is characterized by comprising the following components in percentage by weight:
46-55% of metallurgical slag and 28-35% of inorganic ferric salt
14 to 22 percent of inorganic zinc salt
3. A multi-element compound fertilizer as claimed in claim 1 or 2, characterized by that said metallurgical slag can be converter slag, open-hearth slag, blast furnace slag.
4. The multi-element compound fertilizer as claimed in claim 1, wherein said diammonium phosphate is replaced by monoammonium phosphate, calcium phosphate, superphosphate.
5. The multi-element compound fertilizer as claimed in claim 1, wherein said potassium chloride is replaced by potassium oxide or potassium nitrate.
6. The multi-element compound fertilizer as claimed in claim 2, wherein said inorganic ferric salt is selected from the group consisting of ferric nitrate, ferric sulfate, ferric chloride, and ferrous ammonium sulfate.
7. The multi-element compound fertilizer as claimed in claim 2, wherein said inorganic zinc salt is zinc nitrate, zinc sulfate, zinc oxide.
8. A process for preparing multi-element composite fertilizer as claimed in claim 1, wherein the iron is removed from metallurgical dregs, and is crushed to 80-100 meshes, and after adding acid accounting for 40-60% of the total amount of metallurgical dregs and stirring for reaction for 3-5 min, the pH value of liquid is controlled to 5.0-6.0, and then the mixture is sealed for 1-2 days, and the mixture is taken out and dried at 30-40 ℃, and the required materials are added according to the above-mentioned composition, mixed uniformly and crushed to 80-100 meshes to obtain the product.
9. A process for preparing multi-element composite fertilizer as claimed in claim 2, wherein the iron is removed from metallurgical dregs, and is crushed to 80-100 meshes, and after adding acid accounting for 40-60% of the total amount of metallurgical dregs and stirring for reaction for 3-5 min, the pH value of liquid is controlled to 5.0-6.0, and then the mixture is sealed for 1-2 days, and the mixture is taken out and dried at 30-40 ℃, and the required materials are added according to the above-mentioned composition, mixed uniformly and crushed to 80-100 meshes to obtain the product. Adding iron salt and zinc salt according to the composition, mixing uniformly, and crushing to 80-100 meshes to obtain the product.
10. The method for producing a multi-element compound fertilizer according to claim 1 or 2, wherein said acid is selected from the group consisting of waste sulfuric acid, sulfuric acid; waste nitric acid and nitric acid; waste phosphoric acid, phosphoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97103558 CN1178780A (en) | 1997-04-22 | 1997-04-22 | Multiple element composite fertilizer and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97103558 CN1178780A (en) | 1997-04-22 | 1997-04-22 | Multiple element composite fertilizer and its preparing method |
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| CN1178780A true CN1178780A (en) | 1998-04-15 |
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| CN 97103558 Pending CN1178780A (en) | 1997-04-22 | 1997-04-22 | Multiple element composite fertilizer and its preparing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8811137B2 (en) | 2005-02-16 | 2014-08-19 | Mitsubishi Electric Corporation | Optical disc and optical disc device |
| CN105052497A (en) * | 2015-08-19 | 2015-11-18 | 颍上县小张庄农业科技有限公司 | Planting method for corn in northern region of Fuyang |
| CN107006356A (en) * | 2017-05-22 | 2017-08-04 | 青海顺泰农牧开发有限公司 | A kind of blast furnace granulated slag soilless culture substance and preparation method thereof |
-
1997
- 1997-04-22 CN CN 97103558 patent/CN1178780A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8811137B2 (en) | 2005-02-16 | 2014-08-19 | Mitsubishi Electric Corporation | Optical disc and optical disc device |
| US8873359B2 (en) | 2005-02-16 | 2014-10-28 | Mitsubishi Electric Corporation | Optical disc and optical disc device |
| CN105052497A (en) * | 2015-08-19 | 2015-11-18 | 颍上县小张庄农业科技有限公司 | Planting method for corn in northern region of Fuyang |
| CN107006356A (en) * | 2017-05-22 | 2017-08-04 | 青海顺泰农牧开发有限公司 | A kind of blast furnace granulated slag soilless culture substance and preparation method thereof |
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