CN101457306A - Waste residue modification method for preparing magnesium metal by pidgeon process - Google Patents
Waste residue modification method for preparing magnesium metal by pidgeon process Download PDFInfo
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- CN101457306A CN101457306A CNA200910020830XA CN200910020830A CN101457306A CN 101457306 A CN101457306 A CN 101457306A CN A200910020830X A CNA200910020830X A CN A200910020830XA CN 200910020830 A CN200910020830 A CN 200910020830A CN 101457306 A CN101457306 A CN 101457306A
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- magnesium
- magnesium metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention provides a method for preparing modified magnesium metal waste residue by a Pidgeon process. The method comprises the following steps: adding an additive containing an aluminum raw material during mixing and milling a magnesium metal raw material for production to obtain an evenly mixed magnesium metal reduction material; allowing the added additive to react with the magnesium residue during the process of reducing the magnesium metal under a high-temperature vacuum condition to form gel mineral; collecting the magnesium metal and then quickly cooling the obtained modified magnesium residue; performing ball milling on the modified magnesium residue obtained by quick cooling to obtain modified magnesium residue mineral powder with the granularity of 45mum and the screen residue less than 12wt%; and taking the obtained powder as a high-activity magnesium residue concrete admixture or a cement composite material. The method has the advantages of simple process, wide variation range of additive amount, less effect on magnesium metal smelting production and low cost; furthermore, the magnesium residue modification process is adopted in the method, which causes the magnesium residue to be widely applied to the cement or the concrete, and causes high utilization rate of the magnesium residue, wide application, energy saving and environmental protection.
Description
Technical field
The invention belongs to metallurgical slag and utilize technical field, be specifically related to a kind of method of preparing magnesium metal by pidgeon process waste residue modification.
Background technology
As everyone knows, the Pidgeon process smelting magnesium is a mature methods, and the magnesium slag that adopts this processing method to produce has very big amount, one ton of MAGNESIUM METAL of common every production will produce six to eight tons of waste residues, be not used not only contaminate environment, and waste resource.
The metal magnesium slag main component is exactly calcium oxide, silicon oxide, relatively near the scoriaceous composition of granulated blast-furnace, belongs to basic slag, is adapted at building material field and uses.
Yet many studies show that is though the magnesium slag contains higher calcium oxide, be generally about 50% weight percent, but it is volume and little in cement and concrete, the most important thing is that wherein magnesium slag pozzolanic activity is not high, has greatly limited the application of magnesium slag in building material field.
The magnesium refuse lac coagulates active not high major cause except the reason of chemical constitution own, mainly is in magnesium slag process of cooling, and the beta-dicalcium silicate mineral crystal with gelling changes into the γ-Dicalcium Phosphate (Feed Grade) that does not have gelling characteristic.
How to improve the gelation activity of magnesium slag, many researchs are inquired into, and application number 00101520.6 adopts the way of shrend cooling, improve magnesium slag activity, reduce the formation of γ-Dicalcium Phosphate (Feed Grade), and the magnesium slag of acquisition is used for cement mixture.Other most of magnesium slag is used for brickmaking, though utilized the magnesium slag preferably, economic benefit is not high.
Domestic scholars attempts silumin is replaced the reduction test (application number 200410020666.X) that ferro-silicon carries out MAGNESIUM METAL, the comprehensive utilization that can improve the magnesium slag in theory, but the research contents of utilizing of not seeing this class magnesium slag.
In order to improve the use volume of magnesium slag in concrete or cement, just must further improve the activity of magnesium slag, this also is the problem that the present invention will relate to.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of technology simple, additive volume variation range is big, and is little to magnesium metal smelting production influence, the method for the preparing magnesium metal by pidgeon process waste residue modification that cost is low.This method realizes the modification of magnesium slag in magnesium slag forming process, handle highly active mineral admixture or the blended material that obtains to be used for concrete or cement by simple fine grinding process again.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method of preparing magnesium metal by pidgeon process waste residue modification is characterized in that may further comprise the steps:
(1) in MAGNESIUM METAL raw materials for production mixing levigated process, add the additive of aluminum-containing raw material, the magnesium metal reduction material that acquisition mixes, the addition of additive is the 3%-15% of MAGNESIUM METAL raw materials for production gross weight, wherein, described MAGNESIUM METAL raw materials for production are calcined dolomite, fluorite and ferrosilicon, and the additive of described aluminum-containing raw material is bauxite or kaolin;
(2) under the vacuum high-temperature condition in the process of reducing metal magnesium, the additive of interpolation and magnesium slag react, and form the gelling mineral, collect MAGNESIUM METAL after, cooling obtains the magnesium slag after the modification fast, described high temperature is meant that temperature is 1150-1250 ℃;
(3) the magnesium slag after the quick cooling acquisition modification in the step (2) is carried out ball milling, obtaining fineness is 45 microns, tails over the modification magnesium slag breeze less than 12wt%, as high-activity magnesium slag concrete admixture or cement mixture.
The gelling mineral are with β-2CaOSiO described in the above-mentioned steps (2)
2, 3CaOAl
2O
3, CaOAl
2O
3, 11CaO7Al
2O
3CaF
2And Q phase 6CaO4Al
2O
3MgOSiO
2Be principal crystalline phase compound gelling material.
Technical thought of the present invention: on basis, in the magnesium metal smelting process, add additive such as the kaolin or the bauxite of aluminum-containing raw material, make in the magnesium slag, to form with β-2CaOSiO to the composition analysis of magnesium dreg chemistry
2, 3CaOAl
2O
3, CaOAl
2O
3, 11CaO7Al
2O
3CaF
2And Q phase 6CaO4Al
2O
3MgOSiO
2Deng being principal crystalline phase compound gelling material, with this magnesium slag cooling levigate after, the final acquisition can be used in cement or the concrete, even belite cement as high activated admixture or adulterant.
The present invention compared with prior art has the following advantages: at first, the present invention prepares the high-activity magnesium slag concrete admixture or cement mixture technology is simple, and additive volume variation range is big, and little to magnesium metal smelting production influence, cost is low.Secondly, the cinder modified technique that the present invention adopts makes that the magnesium slag obtains widely applying in cement or concrete, magnesium slag utilization ratio height, and utilization is big, energy-conserving and environment-protective.
Below by embodiment the present invention is described in further detail.
Embodiment
A kind of method of preparing magnesium metal by pidgeon process waste residue modification may further comprise the steps:
(1) in MAGNESIUM METAL raw materials for production calcined dolomite, fluorite and ferrosilicon mixing levigated process, add the additive alum clay ore deposit or the kaolin of aluminum-containing raw material, the magnesium metal reduction material that acquisition mixes, bauxite or kaolinic addition are the 3%-15% of calcined dolomite, fluorite and ferrosilicon gross weight;
(2) under the vacuum high-temperature condition in the process of reducing metal magnesium, the bauxite of interpolation or kaolin and magnesium slag react, and form with β-2CaOSiO
2, 3CaOAl
2O
3, CaOAl
2O
3, 11CaO7Al
2O
3CaF
2And Q phase 6CaO4Al
2O
3MgOSiO
2Be principal crystalline phase compound gelling mineral, after the collection MAGNESIUM METAL, quick cooling obtains the magnesium slag after the modification, and described high temperature is meant that temperature is 1150-1250 ℃;
(3) the magnesium slag after the quick cooling acquisition modification in the step (2) is carried out ball milling, obtaining fineness is 45 microns, tails over the modification magnesium slag breeze less than 12wt%, as high-activity magnesium slag concrete admixture or cement mixture.
Embodiment 1
By weight percentage, calcined dolomite, fluorite and ferrosilicon: 97%; Bauxite 3%; Vacuum reducing is after 4 hours under 1150 ℃ of conditions of high temperature, behind the magnesium slag air quenching of acquisition, and ball milling, obtaining that fineness is determined as 45 microns, tails over is the modification magnesium slag breeze of 8% (wt%); This breeze is tested its reactivity coefficient: A3=50, A7=56, A28=88, A90=101 according to GB GB/T17671.
Embodiment 2
By weight percentage, calcined dolomite, fluorite and ferrosilicon: 90%; Bauxite 10%; Vacuum reducing is after 4 hours under 1200 ℃ of conditions of high temperature, behind the magnesium slag air quenching of acquisition, and ball milling, obtaining that fineness is determined as 45 microns, tails over is the modification magnesium slag breeze of 5% (wt%); This breeze is tested its reactivity coefficient: A3=72, A7=68, A28=114, A90=129 according to GB GB/T17671.
Embodiment 3
By weight percentage, calcined dolomite, fluorite and ferrosilicon: 85%; Bauxite 15%; Vacuum reducing is after four hours under 1200 ℃ of conditions of high temperature, behind the magnesium slag air quenching of acquisition, and ball milling, obtaining that fineness is determined as 45 microns, tails over is the modification magnesium slag breeze of 7% (wt%); This breeze is tested its reactivity coefficient: A3=99, A7=110, A28=129, A90=138 according to GB GB/T17671.
Embodiment 4
By weight percentage, calcined dolomite, fluorite and ferrosilicon: 95%; Kaolin 5%; Vacuum reducing is after four hours under 1200 ℃ of conditions of high temperature, behind the magnesium slag air quenching of acquisition, and ball milling, obtaining that fineness is determined as 45 microns, tails over is the modification magnesium slag breeze of 10% (wt%); This breeze is tested its reactivity coefficient: A3=52, A7=59, A28=89, A90=105 according to GB GB/T17671.
Embodiment 5
By weight percentage, calcined dolomite, fluorite and ferrosilicon: 90%; Kaolin 10%; Vacuum reducing is after four hours under 1200 ℃ of conditions of high temperature, behind the magnesium slag air quenching of acquisition, and ball milling, obtaining that fineness is determined as 45 microns, tails over is the modification magnesium slag breeze of 6% (wt%); This breeze is tested its reactivity coefficient: A3=67, A7=71, A28=101, A90=120 according to GB GB/T17671.
Embodiment 6
By weight percentage, calcined dolomite, fluorite and ferrosilicon: 85%; Kaolin 15%; Vacuum reducing is after four hours under 1250 ℃ of conditions of high temperature, behind the magnesium slag air quenching of acquisition, and ball milling, obtaining that fineness is determined as 45 microns, tails over is the modification magnesium slag breeze of 5% (wt%); This breeze is tested its reactivity coefficient: A3=95, A7=109, A28=117, A90=130 according to GB GB/T17671.
Claims (2)
1. the method for a preparing magnesium metal by pidgeon process waste residue modification is characterized in that may further comprise the steps:
(1) in MAGNESIUM METAL raw materials for production mixing levigated process, add the additive of aluminum-containing raw material, the magnesium metal reduction material that acquisition mixes, the addition of additive is the 3%-15% of MAGNESIUM METAL raw materials for production gross weight, wherein, described MAGNESIUM METAL raw materials for production are calcined dolomite, fluorite and ferrosilicon, and the additive of described aluminum-containing raw material is bauxite or kaolin;
(2) under the vacuum high-temperature condition in the process of reducing metal magnesium, the additive of interpolation and magnesium slag react, and form the gelling mineral, collect MAGNESIUM METAL after, cooling obtains the magnesium slag after the modification fast, described high temperature is meant that temperature is 1150-1250 ℃;
(3) the magnesium slag after the quick cooling acquisition modification in the step (2) is carried out ball milling, obtaining fineness is 45 microns, tails over the modification magnesium slag breeze less than 12wt%, as high-activity magnesium slag concrete admixture or cement mixture.
2. the method for a kind of preparing magnesium metal by pidgeon process waste residue modification according to claim 1 is characterized in that gelling mineral described in the step (2) are with β-2CaOSiO
2, 3CaOAl
2O
3, CaOAl
2O
3, 11CaO7Al
2O
3CaF
2And Q phase 6CaO4Al
2O
3MgOSiO
2Be principal crystalline phase compound gelling material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910020830XA CN101457306B (en) | 2009-01-08 | 2009-01-08 | Waste residue modification method for preparing magnesium metal by pidgeon process |
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|---|---|---|---|
| CN200910020830XA CN101457306B (en) | 2009-01-08 | 2009-01-08 | Waste residue modification method for preparing magnesium metal by pidgeon process |
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| CN101457306A true CN101457306A (en) | 2009-06-17 |
| CN101457306B CN101457306B (en) | 2011-01-05 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152720A (en) * | 2014-06-23 | 2014-11-19 | 石家庄新华能源环保科技股份有限公司 | Method and device for reducing magnesium metal and byproduct cement clinker through electric heating |
| CN104778972A (en) * | 2015-04-17 | 2015-07-15 | 上海华虹宏力半导体制造有限公司 | Memory array and operation method thereof |
| CN107090547A (en) * | 2017-05-17 | 2017-08-25 | 西安建筑科技大学 | It is a kind of to reduce the method that magnesium process prepares AL-Si-Fe alloy and reduces magnesium in Pidgeon process |
| CN110257646A (en) * | 2019-06-14 | 2019-09-20 | 长安大学 | A kind of process for smelting magnesium and device |
| CN110408400A (en) * | 2019-06-14 | 2019-11-05 | 长安大学 | A kind of metal magnesium slag soil conditioning agent and process for producing same |
| CN111892363A (en) * | 2020-07-28 | 2020-11-06 | 西安交通大学 | Magnesium slag cementing material and forming process method thereof |
| CN113943119A (en) * | 2021-03-27 | 2022-01-18 | 西安科技大学 | Construction method for paving pavement base course by adopting magnesium slag-based cementing material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2934619C (en) * | 2014-01-31 | 2019-01-15 | Halliburton Energy Services, Inc. | Magnesium metal ore waste in well cementing |
-
2009
- 2009-01-08 CN CN200910020830XA patent/CN101457306B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152720A (en) * | 2014-06-23 | 2014-11-19 | 石家庄新华能源环保科技股份有限公司 | Method and device for reducing magnesium metal and byproduct cement clinker through electric heating |
| CN104778972A (en) * | 2015-04-17 | 2015-07-15 | 上海华虹宏力半导体制造有限公司 | Memory array and operation method thereof |
| CN107090547A (en) * | 2017-05-17 | 2017-08-25 | 西安建筑科技大学 | It is a kind of to reduce the method that magnesium process prepares AL-Si-Fe alloy and reduces magnesium in Pidgeon process |
| CN110257646A (en) * | 2019-06-14 | 2019-09-20 | 长安大学 | A kind of process for smelting magnesium and device |
| CN110408400A (en) * | 2019-06-14 | 2019-11-05 | 长安大学 | A kind of metal magnesium slag soil conditioning agent and process for producing same |
| CN111892363A (en) * | 2020-07-28 | 2020-11-06 | 西安交通大学 | Magnesium slag cementing material and forming process method thereof |
| CN111892363B (en) * | 2020-07-28 | 2021-10-19 | 西安交通大学 | Magnesium slag cementing material and forming process method thereof |
| CN113943119A (en) * | 2021-03-27 | 2022-01-18 | 西安科技大学 | Construction method for paving pavement base course by adopting magnesium slag-based cementing material |
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| Publication number | Publication date |
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| CN101457306B (en) | 2011-01-05 |
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