CN102391021A - Method for producing silicon-calcium-magnesium fertilizer by using ironmaking blast furnace water-quenching slag as raw materials - Google Patents
Method for producing silicon-calcium-magnesium fertilizer by using ironmaking blast furnace water-quenching slag as raw materials Download PDFInfo
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Abstract
The invention discloses a method for producing a silicon-calcium-magnesium fertilizer by using ironmaking blast furnace water-quenching slag as raw materials. The method comprises the following steps of: (1) drying the water-quenching slag generated in a blast furnace ironmaking process; (2) adding 5-10wt% of quicklime in the dried water-quenching slag and delivering into a ball milling machine for ball milling; (3) adding 5-10wt% of binders and 10-15wt% of water into powder obtained after the ball milling, and granulating on a fertilizer granulating machine; and (4) drying the granulated fertilizer. The silicon-calcium-magnesium fertilizer prepared in the invention is granular and is different from a powdery silicon fertilizer produced in the past, so that the silicon-calcium-magnesium fertilizer is more convenient to apply in the fields for framers, and damages to crops because the fertilizer is attached to crop blades in a use process are also avoided. In addition, after the quicklime is added, the produced silicon-calcium-magnesium fertilizer has higher available nutrient content and has the effective silicon content capable of reaching more than 30%.
Description
Technical field
The present invention relates to a kind of is the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag.
Background technology
Water Quenching Slag also is blast furnace granulated slag, is that iron and steel enterprise adopts the shrend chilling to handle the waste residue that blast furnace slag forms in iron manufacturing process, and its composition mainly is about: SiO
2, 34.9%, CaO 36.8%, A1
2O
311.3%, MgO, 13.2%.
Water Quenching Slag has very long history as fertilizer in Germany.At present, the main technique that Germany utilizes blast furnace slag to produce siliceous fertilizer is: blast furnace slag is pulverized the levigate certain particle size that reaches directly uses, or blast furnace slag pulverize levigate after, mix directly with phosphate component and to use.Japan adopts the wind method chilling of quenching to handle slag, and utilization ratio of recovery of heat reaches 62.6%, and second stage employ can reach 70%, and the vitrifying rate reaches 96～99%.So both reclaim waste heat, improved the vitrifying rate and the activated silica content of slag again.The slag that the vitrifying rate is high is levigate, or adds some additives ball milling together, reach certain particle size after, directly the form with the commodity siliceous fertilizer comes into the market, the blast furnace slag siliceous fertilizer available silicon content that makes can reach 20%.Korea's Huanghai Sea system iron utilizes the iron-smelting blast furnace grain slag to produce siliceous fertilizer technology: directly with carrying out shrend in the high temperature blast furnace slag impouring water quenching pool; With grab machine the shrend thing is picked up then, add 10% flyash, add water and get into the ball mill wet-milling together; Granularity reaches below 0.5 mm; After drying, promptly get siliceous fertilizer, contain soluble silicon greater than 15% in its siliceous fertilizer that makes, quicklime and Natural manganese dioxide total amount are greater than 30%.Available silicon content is all more than 15% in the siliceous fertilizer that abroad makes, and quicklime and Natural manganese dioxide total amount are greater than 30%.The 80's Mos, Xinyang siliceous fertilizer factory of Henan Prov. Inst. utilizes iron-smelting blast-furnace slag to be the raw material production siliceous fertilizer, has built up small-sized siliceous fertilizer factory in succession in some places.Yunnan Province built up siliceous fertilizer experiment production plant--elder brother's phosphorus multi-element fertilizer factory from 1989, scale is for producing siliceous fertilizer 0.7～10,000 t per year.According to incompletely statistics, China's siliceous fertilizer yearly capacity but mainly still concentrates on indivedual provinces more than 1O0 ten thousand t, and wherein Henan Province produces siliceous fertilizer 600,000 t per year, and siliceous fertilizer manufacturer in Yunnan reaches 20 families, and yearly capacity reaches 300,000 t.In recent years, the silicon element fertilizer material more and more comes into one's own in the whole nation, and the siliceous fertilizer YO in Hunan, Hubei, Jiangsu also surpasses 100,000 t.
Domestic production at present and the siliceous fertilizer of using mainly contain two types: one type is synthetic, like Dicalcium Phosphate (Feed Grade) (2CaOSiO
2), monocalcium silicate (CaOSiO
2), calcium magnesium silicate (CaOMgOSiO
2), Starso and staple be efficient siliceous fertilizer of water glass and Starso etc.Its basic technology is: with water glass raw material, and the device fabrication of utilization hig h-speed centrifugal spray drying; Earlier raw water glass is carried out centrifuge dehydration, send in the supercentrifuge and dewater, the hot blast of spraying then (controlled temperature) dry solidification powdering promptly gets efficient siliceous fertilizer goods.The siliceous fertilizer available silicon content that this explained hereafter goes out is greater than 50%, but costs an arm and a leg, and it is big to promote difficulty.Another kind of then is the siliceous fertilizer that utilizes various industrial solid castoffs to process.Its raw material is from following several respects: the one, and the blast furnace water quenching slag that produces in the iron manufacturing process, total silicone content is 30%～35%; The 2nd, the waste residue that produces in yellow phosphorus or the production process of phosphoric acid, total silicon is 18%～22%; The 3rd, fly ash in electric power plant, total silicone content reaches 20%～30%; The 4th, cullet.Wherein the small-sized siliceous fertilizer of most domestic factory utilizes phosphorus slag or flyash in the above-mentioned raw materials for the raw material production siliceous fertilizer; Have only siliceous fertilizer factory of several family to utilize iron-smelting blast-furnace slag to be the raw material production siliceous fertilizer, its technology basically all is to adopt natural air drying slag-ball milling-sieve-drying technology process.
The blast furnace slag siliceous fertilizer of Anshan iron and steel plant slag development company development recently obtains big area northeastward and uses, and its technology is: with Water Quenching Slag draining, natural air drying; Get into crusher then and carry out fragmentation and screening and removing impurities; Get into the ball mill ball milling again, sieve, packing promptly obtains the commodity siliceous fertilizer at last.Baoshan Iron and Steel Group utilizes this scientific research project of iron-smelting blast-furnace slag exploitation siliceous fertilizer also to obtain certain progress.The patent No. is 881046507 Chinese patent " working method of high effective silica fertilizer ", is to be utilized in the siliceous fertilizer that produces in the pre-treatment liquid pig iron process and have the slag production of higher soluble silica content.But there is complex manufacturing in aforesaid method, and processing temperature is higher, the shortcoming that available silicon content is low.
The subject matter that siliceous fertilizer research and development at present exist: some siliceous fertilizer selling at exorbitant prices, be difficult to apply, some siliceous fertilizer available silicon content is low, and effect of increasing production is not remarkable; Some siliceous fertilizer self heavy metal content is higher, and long-term application will be aggravated the environmental exposure of soil.Some enterprises do not have granulating working procedure from cost consideration in making the siliceous fertilizer process, in pulverous siliceous fertilizer application, dust raising phenomenon is serious, and dust is bonded on the plant body, and its alkaline matter damages plant.Some conventional granular siliceous fertilizers adopt the water glass to make tackiness agent, and the siliceous fertilizer particle of its formation is hard, and the long-time difficult dispersion in the back that is manured into soil, indissoluble are separated, and plant is difficult to absorb its effective silicon, greatly reduces the fertilizer efficiency of siliceous fertilizer.
Summary of the invention
The purpose of this invention is to provide a kind of is the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag.
The technical scheme that the present invention taked is:
A kind of is the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, may further comprise the steps:
1) Water Quenching Slag that produces in the blast furnace ironmaking process is dry;
2) unslaked lime of interpolation 5-10wt% in the dried water slag is sent into ball milling in the ball mill again;
3) add the sticker of 5-10wt% and the water of 10-15wt%, granulation on the granulation of fertilizer machine in the powder behind the ball milling;
4) fertilizer after the granulation gets final product through drying.
In the step 1), it is 15-25wt% that water slag is dried to water cut.
Step 2) in, add the unslaked lime of 5-10wt% in the water slag after, send into again that ball milling to particle diameter is the 80-100 order in the ball mill.
In the step 3), granulation to particle diameter is 2-4mm on the granulation of fertilizer machine.
The invention has the beneficial effects as follows: the silicon-calcium-magnesium fertilizer that the employing present technique is produced is different from the powdery siliceous fertilizer of producing before in pelletized form, and therefore use in more convenient peasant household field, has also avoided because of fertilizer sticks on the farm crop blade crop being damaged in the use.After adding unslaked lime on the other hand, the silicon-calcium-magnesium fertilizer available nutrient content of being produced is higher, and its available silicon content can reach more than 30%.
Embodiment
A kind of is the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, may further comprise the steps:
1) Water Quenching Slag that produces in the blast furnace ironmaking process being dried to water cut is 15-25wt%;
2) add the unslaked lime account for water slag 5-10wt% in the dried water slag, send into again that ball milling to particle diameter is the 80-100 order in the ball mill;
3) add the water that accounts for the sticker of powder 5-10wt% and account for powder 10-15wt% in the powder behind the ball milling, granulation to particle diameter is 2-4mm on the granulation of fertilizer machine;
4) fertilizer after the granulation gets final product through dry, packing.
In the step 3), described sticker is a kind of in clay, chalk soil, kaolin, coal slime, magnesia, sepiolite powder, phosphogypsum, the fused(calcium magnesium)phosphate, for known in this field.
Further specify the present invention below in conjunction with specific embodiment:
Embodiment 1:
A kind of is the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, may further comprise the steps:
1) Water Quenching Slag that produces in the blast furnace ironmaking process being dried to water cut is 15wt%;
2) add the unslaked lime account for water slag 5wt% in the dried water slag, send into again that ball milling to particle diameter is the 80-100 order in the ball mill;
3) add the water that accounts for the sticker (clay) of powder 5wt% and account for powder 10wt% in the powder behind the ball milling, granulation to particle diameter is 2-4mm on the granulation of fertilizer machine;
4) fertilizer after the granulation gets final product through dry, packing.
Through detecting, this finished product fertilizer in pelletized form, pH is 11.4, nutrient content is SiO
235%, CaO 30%, and MgO 15%.
Embodiment 2:
1) Water Quenching Slag that produces in the blast furnace ironmaking process being dried to water cut is 25wt%;
2) add the unslaked lime account for water slag 10wt% in the dried water slag, send into again that ball milling to particle diameter is the 80-100 order in the ball mill;
3) add the water that accounts for the sticker (clay) of powder 10wt% and account for powder 15wt% in the powder behind the ball milling, granulation to particle diameter is 2-4mm on the granulation of fertilizer machine;
4) fertilizer after the granulation gets final product through dry, packing.
Through detecting, this finished product fertilizer in pelletized form, pH is 12.5, nutrient content is SiO
232%, CaO 35%, and MgO 12%.
Embodiment 3:
1) Water Quenching Slag that produces in the blast furnace ironmaking process being dried to water cut is 18wt%;
2) add the unslaked lime account for water slag 8wt% in the dried water slag, send into again that ball milling to particle diameter is the 80-100 order in the ball mill;
3) add the water that accounts for the sticker (kaolin) of powder 8wt% and account for powder 12wt% in the powder behind the ball milling, granulation to particle diameter is 2-4mm on the granulation of fertilizer machine;
4) fertilizer after the granulation gets final product through dry, packing.
Through detecting, this finished product fertilizer in pelletized form, pH is 12.1, nutrient content is SiO
233%, CaO 32%, and MgO 13%.
The present invention adds the technology of the unslaked lime of 5%-10% in the grain slag mechanical milling process; Utilize the condition of high temperature that produces in the mechanical milling process; Make the silicon dioxde reaction in unslaked lime (quicklime) and the grain slag generate Calucium Silicate powder; Thereby help the absorption of plant, can improve the validity of silicon greatly, effectively silicon can be brought up to more than 30% from 5%.Two, adopt granulation process.Through to the control of ball milling grade and the interpolation of sticker, utilize conventional production of compound fertilizer line can produce the granulous silicon-calcium-magnesium fertilizer.
Claims (4)
1. one kind is the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, it is characterized in that: may further comprise the steps:
1) Water Quenching Slag that produces in the blast furnace ironmaking process is dry;
2) unslaked lime of interpolation 5-10wt% in the dried water slag is sent into ball milling in the ball mill again;
3) add the sticker of 5-10wt% and the water of 10-15wt%, granulation on the granulation of fertilizer machine in the powder behind the ball milling;
4) fertilizer after the granulation gets final product through drying.
2. according to claim 1 a kind of be the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, it is characterized in that: in the step 1), it is 15-25wt% that water slag is dried to water cut.
3. according to claim 1 a kind of be the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, it is characterized in that: step 2) in, add the unslaked lime of 5-10wt% in the water slag after, send into again that ball milling to particle diameter is the 80-100 order in the ball mill.
4. according to claim 1 a kind of be the method for raw material production silicon-calcium-magnesium fertilizer material with the iron-smelting blast furnace Water Quenching Slag, it is characterized in that: in the step 3), granulation to particle diameter is 2-4mm on the granulation of fertilizer machine.
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Cited By (7)
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| CN102757274A (en) * | 2012-06-30 | 2012-10-31 | 华南农业大学 | Preparation method for physicochemical comprehensive release promotion of silicon fertilizer rich in silicon minerals |
| CN105347907A (en) * | 2015-10-19 | 2016-02-24 | 福建金土地生物科技有限公司 | Biochar-based fertilizer for restoration of heavy metal contamination of arable soil |
| CN106365899A (en) * | 2016-08-27 | 2017-02-01 | 中南民族大学 | Method for preparing silicon fertilizers by using industrial waste residues |
| CN106434389A (en) * | 2016-12-06 | 2017-02-22 | 领先生物农业股份有限公司 | Penicillium sp. LX-ZJ-2 and application thereof |
| CN109734482A (en) * | 2019-03-22 | 2019-05-10 | 格丰科技材料有限公司 | A kind of efficient siliceous fertilizer and preparation method thereof |
| JP2019123631A (en) * | 2018-01-15 | 2019-07-25 | 太平洋セメント株式会社 | Silicic acid fertilizer and manufacturing method therefor |
| CN111018573A (en) * | 2019-12-24 | 2020-04-17 | 江阴硕人节能环保科技有限公司 | Silicon fertilizer and production process thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757274A (en) * | 2012-06-30 | 2012-10-31 | 华南农业大学 | Preparation method for physicochemical comprehensive release promotion of silicon fertilizer rich in silicon minerals |
| CN102757274B (en) * | 2012-06-30 | 2014-09-24 | 华南农业大学 | Preparation method for physicochemical comprehensive release promotion of silicon fertilizer rich in silicon minerals |
| CN105347907A (en) * | 2015-10-19 | 2016-02-24 | 福建金土地生物科技有限公司 | Biochar-based fertilizer for restoration of heavy metal contamination of arable soil |
| CN105347907B (en) * | 2015-10-19 | 2018-11-16 | 福建金土地生物科技有限公司 | Charcoal base manure material is repaired for Heavy Metal Pollution In Cultivated Land |
| CN106365899A (en) * | 2016-08-27 | 2017-02-01 | 中南民族大学 | Method for preparing silicon fertilizers by using industrial waste residues |
| CN106434389A (en) * | 2016-12-06 | 2017-02-22 | 领先生物农业股份有限公司 | Penicillium sp. LX-ZJ-2 and application thereof |
| CN106434389B (en) * | 2016-12-06 | 2019-08-09 | 领先生物农业股份有限公司 | One plant of mould LX-ZJ-2 and application thereof |
| JP2019123631A (en) * | 2018-01-15 | 2019-07-25 | 太平洋セメント株式会社 | Silicic acid fertilizer and manufacturing method therefor |
| JP7079100B2 (en) | 2018-01-15 | 2022-06-01 | 太平洋セメント株式会社 | Silicic acid fertilizer and its manufacturing method |
| CN109734482A (en) * | 2019-03-22 | 2019-05-10 | 格丰科技材料有限公司 | A kind of efficient siliceous fertilizer and preparation method thereof |
| CN111018573A (en) * | 2019-12-24 | 2020-04-17 | 江阴硕人节能环保科技有限公司 | Silicon fertilizer and production process thereof |
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