CN102030566A - New process for producing efficient calcium magnesium sulphur silicon fertilizer by utilizing slag from magnesium reduction furnace - Google Patents
New process for producing efficient calcium magnesium sulphur silicon fertilizer by utilizing slag from magnesium reduction furnace Download PDFInfo
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- CN102030566A CN102030566A CN 201010553703 CN201010553703A CN102030566A CN 102030566 A CN102030566 A CN 102030566A CN 201010553703 CN201010553703 CN 201010553703 CN 201010553703 A CN201010553703 A CN 201010553703A CN 102030566 A CN102030566 A CN 102030566A
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- magnesium
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Abstract
The invention relates to a new process for producing efficient calcium magnesium sulphur silicon fertilizer by utilizing slag from a magnesium reduction furnace, which comprises the following steps of: firstly, crushing the slag from the magnesium reduction furnace to form about 100 to 200-mesh powder, reacting with diluted hydrochloric acid, and filtering out a silicon dioxide polymer; secondly, dividing filter liquor into two parts, evaporating and crystallizing one part directly to form mixed crystals of calcium chloride and magnesium chloride, and after reacting the other part with dilute sulphuric acid fully, evaporating and crystallizing to obtain mixed crystals of calcium sulfate and magnesium sulfate; and finally, mixing the silicon dioxide polymer and the all mixed crystals, and pelletizing to produce the calcium magnesium sulphur silicon fertilizer. In the new process, fertilizer of which the main ingredients are the calcium chloride, the magnesium chloride, the calcium sulfate, the magnesium sulfate, active silicon dioxide and the like is produced by taking industrial by-products such as the slag from the magnesium reduction furnace, the diluted hydrochloric acid, the dilute sulphuric acid and the like as raw materials, so the problems that the slag from the magnesium reduction furnace is difficult to process and the environment is polluted seriously are solved completely; and the new process has the advantages of turning waste into treasure along with low production cost, no secondary pollution and the like, and has wide market prospects.
Description
Technical field
The present invention relates to a kind of novel process, relate in particular to and utilize the magnesium reducing furnace slag to produce the novel process of calcium magnesium sulphur silicon fertilizer magnesium reducing furnace slag recycling.
Background technology
In the smelting process of MAGNESIUM METAL, can produce a large amount of magnesium reducing furnace slags, the easy efflorescence of this waste residue, aquation solution shows alkalescence, serious environment pollution.Resource recycling mode for the magnesium reducing furnace slag mainly comprises at present: make Mg-slag brick, materials for wall, cement ingredient and sweetening agent etc.Because the MgO content in the magnesium reducing furnace slag is higher, and the composition less stable, causes the hardenite spalling of Mg-slag brick, materials for wall and cement products easily, has limited the large-scale application of magnesium reducing furnace slag; And the magnesium reducing furnace slag is also at the experimental stage as the research of sweetening agent, and be subjected to the restriction of industrial use aspect.Therefore the handling problem of magnesium reducing furnace slag can be described as the major obstacle of magnesium industry development.
Summary of the invention
The objective of the invention is to: a kind of novel process of utilizing the magnesium reducing furnace slag to produce calcium magnesium sulphur silicon fertilizer is provided.This technology is raw material with magnesium reducing furnace slag, industrial dilute hydrochloric acid and dilute sulphuric acid, and production can be turned waste into wealth for the calcium magnesium sulphur silicon fertilizer of crop absorption, makes that the magnesium reducing furnace slag is difficult, problem of environment pollution caused is solved.
Utilize the novel process of the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer, may further comprise the steps:
(1) with the magnesium reducing furnace slag through about pulverizer grinding to 100～200 orders;
(2) after magnesium reducing furnace slag behind the grinding and dilute hydrochloric acid fully react, filter out filter residue, promptly silica polymer is standby with the silica polymer oven dry grinding that obtains;
(3) filtrate is divided into two parts of A, B, A, B ratio are 1:(1.7～2), after A solution and dilute sulphuric acid fully reacted, evaporative crystallization went out the mixed crystal of calcium sulfate and sal epsom, and B solution goes out to contain the mixed crystal of calcium chloride and magnesium chloride 100～150 ℃ of following direct evaporation crystallizations;
(4) mixed crystal of silica polymer, calcium chloride crystal and magnesium chloride, calcium sulfate and sal epsom mixed crystal are mixed the back granulation, get final product calcium magnesium sulphur silicon fertilizer.
The composition of the magnesium reducing furnace slag in the described step (1) is: CaO:45～58%, MgO:7～10%, SiO
2: 25～35%, Fe
2O
3: 4～5%, Al
2O
3Ignore.
The required dilute hydrochloric acid concentration of reaction is between 15～25% in the described step (2), reacts required dilute sulphuric acid concentration between 25～40%.
The proportional range of the required magnesium reducing furnace slag of the described novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer, dilute hydrochloric acid, dilute sulphuric acid is 1:(2～2.5): (1.5～2).
After will drying in the described step (2) silica polymer grinding to 100～200 orders.
Be to utilize vacuum filtration to leach filter residue in the described step (2).
The present invention has following several big advantage than the treatment process of other magnesium reducing furnace slag:
(1) China is large agricultural country, year makes fertilizer application amount very big, and China ploughs and generally lack elements such as calcium, magnesium, sulphur, silicon, therefore the magnesium reducing furnace slag is made calcium magnesium sulphur silicon fertilizer, and market outlook are wide.
(2) required hydrochloric acid and the sulfuric acid of technology is industry byproduct, and production cost is low.
(3) technology is simple, and cost of investment is low.
(4) the magnesium reduction slag is thoroughly turned waste into wealth non-secondary pollution.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Magnesium reducing furnace raw slag used in the present invention adopts the magnesium reduction slag of Wenxi County, Shanxi silver light magnesium industry company, and its chemical ingredients CaO is 57.5%, and MgO is 7.26%, SiO
2Be 30.5%, Fe
2O
3Be 4.18%, Al
2O
3Be 0.46%, all the other are impurity.
Embodiment 1:
With pulverizer the magnesium reducing furnace pulverized slag is milled to 100 orders, takes by weighing 100g, and prepare the hydrochloric acid 300mL of 15% concentration, the sulfuric acid 200mL of 30% concentration; The dilute hydrochloric acid of 15% concentration is slowly sneaked into the magnesium reducing furnace slag, constantly stir, reduce between 6～7 until the solution pH value; Use the vacuum pump filtering reacting solution, isolate silica polymer, oven dry back secondary grinding to 150 order; Filtrate is divided into two parts of A, B in the 1:1.7 ratio, adds the dilute sulphuric acid of 30% concentration in A solution, do not have the dilute sulphuric acid that continues to splash into after precipitation generates about 30mL, evaporative crystallization goes out the mixed crystal of calcium sulfate and sal epsom; At 150 ℃ of following direct evaporation B solution, go out the mixed crystal of calcium chloride and magnesium chloride until crystallization; With silica polymer and all xln mixing granulations, can obtain calcium magnesium sulphur silicon fertilizer at last.
Embodiment 2:
With pulverizer the magnesium reducing furnace pulverized slag is milled to 150 orders, takes by weighing 100g, and prepare the hydrochloric acid 300mL of 20% concentration, the sulfuric acid 200mL of 35% concentration; The dilute hydrochloric acid of 20% concentration is slowly sneaked into the magnesium reducing furnace slag, constantly stir, reduce between 6～7 until the solution pH value; Use the vacuum pump filtering reacting solution, isolate silica polymer, oven dry back secondary grinding to 150 order; Filtrate is divided into two parts of A, B in the 1:2 ratio, adds the dilute sulphuric acid of 35% concentration in A solution, do not have the dilute sulphuric acid that continues to splash into after precipitation generates about 20mL, evaporative crystallization goes out the mixed crystal of calcium sulfate and sal epsom; At 150 ℃ of following direct evaporation B solution, go out the mixed crystal of calcium chloride and magnesium chloride until crystallization; With silica polymer and all xln mixing granulations, can obtain calcium magnesium sulphur silicon fertilizer at last.
Embodiment 3:
With pulverizer the magnesium reducing furnace pulverized slag is milled to 200 orders, takes by weighing 100g, and prepare the hydrochloric acid 300mL of 25% concentration, the sulfuric acid 200mL of 40% concentration; The dilute hydrochloric acid of 25% concentration is slowly sneaked into the magnesium reducing furnace slag, constantly stir, reduce between 6～7 until the solution pH value; Use the vacuum pump filtering reacting solution, isolate silica polymer, oven dry back secondary grinding to 150 order; Filtrate is divided into two parts of A, B in the 1:2 ratio, adds the dilute sulphuric acid of 40% concentration in A solution, do not have the dilute sulphuric acid that continues to splash into after precipitation generates about 10mL, evaporative crystallization goes out the mixed crystal of calcium sulfate and sal epsom; At 150 ℃ of following direct evaporation B solution, go out the mixed crystal of calcium chloride and magnesium chloride until crystallization; With silica polymer and all xln mixing granulations, can obtain calcium magnesium sulphur silicon fertilizer at last.
Claims (6)
1. utilize the novel process of the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer, it is characterized in that: may further comprise the steps:
With the magnesium reducing furnace slag through about pulverizer grinding to 100～200 orders;
After magnesium reducing furnace slag behind the grinding and dilute hydrochloric acid fully react, filter out filter residue, promptly silica polymer is standby with the silica polymer oven dry grinding that obtains;
Filtrate is divided into two parts of A, B, A, B ratio are 1:(1.7～2), after A solution and dilute sulphuric acid fully reacted, evaporative crystallization went out the mixed crystal of calcium sulfate and sal epsom, and B solution goes out to contain the mixed crystal of calcium chloride and magnesium chloride 100～150 ℃ of following direct evaporation crystallizations;
The mixed crystal of silica polymer, calcium chloride crystal and magnesium chloride, calcium sulfate and sal epsom mixed crystal are mixed the back granulation, get final product calcium magnesium sulphur silicon fertilizer.
2. the novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer according to claim 1, it is characterized in that: the composition of the magnesium reducing furnace slag in the described step (1) is: CaO:45～58%, MgO:7～10%, SiO
2: 25～35%, Fe
2O
3: 4～5%, Al
2O
3Ignore.
3. the novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer according to claim 1, it is characterized in that: the required dilute hydrochloric acid concentration of reaction is reacted required dilute sulphuric acid concentration between 25～40% between 15～25% in the described step (2).
4. according to each described novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer in the claim 1 to 3, it is characterized in that: the proportional range of the required magnesium reducing furnace slag of the described novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer, dilute hydrochloric acid, dilute sulphuric acid is 1:(2～2.5): (1.5～2).
5. the novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer according to claim 1 is characterized in that: after will drying in the described step (2) silica polymer grinding to 100～200 orders.
6. the novel process of utilizing the efficient calcium magnesium of magnesium reducing furnace slag production sulphur silicon fertilizer according to claim 1 is characterized in that: be to utilize vacuum filtration to leach filter residue in the described step (2).
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| CN2010105537039A CN102030566B (en) | 2010-11-22 | 2010-11-22 | New process for producing efficient calcium magnesium sulphur silicon fertilizer by utilizing slag from magnesium reduction furnace |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807457A (en) * | 2012-09-01 | 2012-12-05 | 曹志强 | Mineral nutrient for ginseng and American ginseng and preparation method of mineral nutrient |
| CN103553109A (en) * | 2013-10-11 | 2014-02-05 | 银川能源学院 | Comprehensive utilization method of magnesium-smelting slag from Pidgeon process |
| CN104628479A (en) * | 2015-02-09 | 2015-05-20 | 山西大学 | Method for preparing controlled release compound fertilizer through magnesium slag phosphorus acid passivation |
| CN104649784A (en) * | 2015-02-09 | 2015-05-27 | 山西大学 | Method for preparing silicon-potash fertilizer based on magnesium slag |
| CN106187330A (en) * | 2016-07-08 | 2016-12-07 | 贵州鑫亚矿业有限公司 | A kind of amorphous silica prepares the method for high-quality solubility in citric acid siliceous fertilizer |
| CN106180121A (en) * | 2016-07-06 | 2016-12-07 | 洪昆喨 | A kind of processing method of converter stone waste material |
| CN110734349A (en) * | 2019-10-31 | 2020-01-31 | 西安交通大学 | calcium magnesium phosphorus compound fertilizer prepared from waste slag from Pidgeon magnesium smelting and method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102172A (en) * | 1993-10-28 | 1995-05-03 | 太原钢铁公司 | Multielement compound fertilizer and making method thereof |
| JP2000034185A (en) * | 1998-07-21 | 2000-02-02 | Denki Kagaku Kogyo Kk | Inorganic composition, its production, fertilizer and soil conditioner using the same |
| CN1923764A (en) * | 2006-03-15 | 2007-03-07 | 岳玉友 | Silicon, calcium and magnesium fertilizer |
-
2010
- 2010-11-22 CN CN2010105537039A patent/CN102030566B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102172A (en) * | 1993-10-28 | 1995-05-03 | 太原钢铁公司 | Multielement compound fertilizer and making method thereof |
| JP2000034185A (en) * | 1998-07-21 | 2000-02-02 | Denki Kagaku Kogyo Kk | Inorganic composition, its production, fertilizer and soil conditioner using the same |
| CN1923764A (en) * | 2006-03-15 | 2007-03-07 | 岳玉友 | Silicon, calcium and magnesium fertilizer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807457A (en) * | 2012-09-01 | 2012-12-05 | 曹志强 | Mineral nutrient for ginseng and American ginseng and preparation method of mineral nutrient |
| CN103553109A (en) * | 2013-10-11 | 2014-02-05 | 银川能源学院 | Comprehensive utilization method of magnesium-smelting slag from Pidgeon process |
| CN104628479A (en) * | 2015-02-09 | 2015-05-20 | 山西大学 | Method for preparing controlled release compound fertilizer through magnesium slag phosphorus acid passivation |
| CN104649784A (en) * | 2015-02-09 | 2015-05-27 | 山西大学 | Method for preparing silicon-potash fertilizer based on magnesium slag |
| CN106180121A (en) * | 2016-07-06 | 2016-12-07 | 洪昆喨 | A kind of processing method of converter stone waste material |
| CN106180121B (en) * | 2016-07-06 | 2018-09-04 | 洪昆喨 | A kind of processing method of converter stone waste material |
| CN106187330A (en) * | 2016-07-08 | 2016-12-07 | 贵州鑫亚矿业有限公司 | A kind of amorphous silica prepares the method for high-quality solubility in citric acid siliceous fertilizer |
| CN110734349A (en) * | 2019-10-31 | 2020-01-31 | 西安交通大学 | calcium magnesium phosphorus compound fertilizer prepared from waste slag from Pidgeon magnesium smelting and method thereof |
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|---|---|
| CN102030566B (en) | 2012-08-22 |
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