CN111088429A - Method for extracting manganese from silicon-manganese slag through high-temperature reduction method and preparing slag liquid with high acidity coefficient - Google Patents
Method for extracting manganese from silicon-manganese slag through high-temperature reduction method and preparing slag liquid with high acidity coefficient Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 115
- 239000007788 liquid Substances 0.000 title claims abstract description 65
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 40
- 239000011572 manganese Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 36
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 title description 3
- 238000005496 tempering Methods 0.000 claims abstract description 50
- 229910000720 Silicomanganese Inorganic materials 0.000 claims abstract description 46
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000000571 coke Substances 0.000 claims description 27
- 238000010791 quenching Methods 0.000 claims description 25
- 230000000171 quenching effect Effects 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 229910052593 corundum Inorganic materials 0.000 claims description 11
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000011490 mineral wool Substances 0.000 abstract description 4
- 238000006722 reduction reaction Methods 0.000 description 24
- 239000011521 glass Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000002923 metal particle Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000013080 microcrystalline material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B47/00—Obtaining manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a method for extracting manganese from silicomanganese slag through high-temperature reduction and preparing slag liquid with high acidity coefficient, which is characterized in that a reducing agent is paved at the bottom of a tempering furnace, silicomanganese slag is added into the tempering furnace to be fully contacted, the temperature in the tempering furnace is kept between 1450 ℃ and 1600 ℃, the temperature is kept for 3 to 6 hours, a first discharge port is arranged at the bottom of the tempering furnace, a second discharge port is arranged on the side wall of the tempering furnace, the height of the second discharge port is higher than that of the first discharge port, the first discharge port is used for discharging reduced manganese liquid, and the second discharge port is used for discharging light slag liquid. Can be directly used for mineral wool production, thereby achieving two purposes.
Description
Technical Field
The invention relates to the technical field of alloy slag utilization, in particular to a method for quenching and tempering silicomanganese slag to extract manganese and preparing slag liquid with high acidity coefficient by a high-temperature reduction method.
Background
In 2018, the national production of the ferroalloy slag reaches 6246.8 ten thousand tons, wherein the conservative estimated total production of the silicomanganese slag is about 700 ten thousand tons. The silicomanganese alloy is used as an important auxiliary material for steel production and occupies an important position in an industrial structure, silicomanganese slag is a main byproduct for alloy production, and the waste slag contains a small amount of valuable metals such as iron, chromium and the like and also contains 5-18% of manganese. At present, the comprehensive utilization of hot melting slag is greatly influenced by the over-high content of manganese element in the silicomanganese slag, a small part of silicomanganese slag can be used for producing building materials, and a large amount of residual silicomanganese slag is stacked in a slag field, so that the land is occupied, huge resource waste is caused, and serious pollution and harm are brought to the living environment of human beings.
Disclosure of Invention
It is necessary to provide a method for quenching and tempering silicomanganese slag to extract manganese and preparing slag liquid with high acidity coefficient by a high-temperature reduction method.
A method for extracting manganese from silicomanganese slag through high-temperature reduction and preparing slag liquid with high acidity coefficient includes the steps of laying a reducing agent at the bottom of a hardening and tempering furnace, adding the silicomanganese slag into the hardening and tempering furnace to enable the silicomanganese slag and the hardening and tempering furnace to be in full contact, keeping the temperature in the hardening and tempering furnace between 1450 ℃ and 1600 ℃, preserving heat for 3-6 hours, arranging a first discharge port at the bottom of the hardening and tempering furnace, arranging a second discharge port on the side wall of the hardening and tempering furnace, enabling the height of the second discharge port to be higher than that of the first discharge port, enabling the first discharge port to be used for discharging reduced manganese liquid, and enabling the second discharge port to be used for discharging light.
Preferably, the reducing agent is coke.
Preferably, the reducing agent is semi coke.
Preferably, the semi coke is dried before being added into the quenching and tempering furnace, so that the moisture content in the semi coke is reduced.
Preferably, the acidity coefficient of the light slag liquid subjected to reduction tempering by the tempering furnace is 2.0-2.4; wherein, the calculation formula of the acidity coefficient is as follows:
。
preferably, the composition comprises the following components in parts by mass: SiO 2235-50 parts of Al2O310-17 parts of CaO, 18-27 parts of MgO, 1-5 parts of MnO, 1-18 parts of TFe and K2O1-3 parts, Na20-2 parts of O.
Preferably, the composition comprises the following components in parts by mass: SiO 2240-50 parts of Al2O314-24 parts of CaO, 20-25 parts of MgO, 3-7 parts of MnO, 0.2-6 parts of TFe, 0.1-1 part of K20 to 1 portion of O, Na20-1 part of O.
In the invention, based on the situation of increasing shortage of mineral resources and the requirement of sustainable development of regional economy at present, the comprehensive utilization of the silicomanganese slag is researched by adopting a deep high-temperature reduction process. The development of the technology can solve the problems of occupation and land pollution caused by stacking and placing the alloy slag, reduce, harmlessly and resourcefully the solid waste, expand the potential amount of national resources, widen employment channels, and simultaneously improve the further utilization of the silicomanganese slag.
According to the invention, not only can the alloy slag be recycled, but also the manganese element in the slag liquid can be extracted and separated, the extracted reduced manganese can be used as a high-manganese material for recycling, and meanwhile, after the manganese is extracted and separated, the acidity coefficient of the residual slag liquid is greatly improved, so that the method can be directly used for mineral wool production, thereby achieving two purposes.
Drawings
FIG. 1 is a schematic diagram of the process of the present invention.
In the figure: a tempering furnace 1010, a first discharge port 11, and a second discharge port 12.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1, an embodiment of the present invention provides a method for extracting manganese from silicomanganese slag through high-temperature reduction quenching and tempering, and preparing slag liquid with a high acidity coefficient, wherein a reducing agent is laid at the bottom of a quenching and tempering furnace 10, the silicomanganese slag is added into the quenching and tempering furnace 10, the silicomanganese slag and the quenching and tempering furnace are in full contact, the temperature in the quenching and tempering furnace 10 is kept at 1450-1600 ℃, the temperature is kept for 3-6 hours, a first discharge port 11 is formed at the bottom of the quenching and tempering furnace 10, a second discharge port 12 is formed in a side wall of the quenching and tempering furnace 10, the height of the second discharge port 12 is higher than that of the first discharge port 11, the first discharge port 11 is used for discharging reduced manganese liquid, and the second discharge port 12 is used for discharging light.
In the invention, the reducing agent coke is arranged at the bottom of the quenching and tempering furnace 10, the contact between the slag liquid and the reducing agent is promoted along with the natural gravity in the process of the slag liquid descending, the process of the slag liquid passing through the reducing agent layer is also the process of the reduction reaction, and when the reduction reaction of the reducing agent at the bottom occurs, carbon-containing gas can be generated and floats upwards from the bottom of the furnace body to play a role of stirring the slag liquid, thereby promoting the contact between the slag liquid and the reducing agent. This method is different from the method of feeding the reducing agent into the slag liquid from the outside.
In order to ensure that the slag liquid is fully reduced, the amount of the reducing agent is excessive.
Aiming at the characteristic of high manganese content in silicomanganese slag, the acidity coefficient of slag liquid is low and cannot be directly applied to secondary production when the content of manganese in the slag liquid is high because manganese is a divalent basic element, and in order to improve the acidity coefficient of the slag liquid, the conventional method has more ideas, such as improving the acidity coefficient by adding an acidic element (such as fly ash and the like), but improving the acidity coefficient by adopting a reverse thinking in the invention and reducing the basic element in the slag liquid, the ideas can improve the acidity coefficient of the slag liquid, reduce the content of impurity elements in the slag liquid, extract useful manganese elements and secondarily utilize the manganese elements, and in the light slag liquid obtained by the method, the content of impurities is low, particularly the content of the basic element is low, the slag liquid is pure, and in the process of preparing mineral wool, a microcrystalline material and a cement gelled material, the obtained product has longer fiber and excellent performance.
Particularly, in the production process of mineral wool, microcrystalline materials and cement gelled materials, the acidity coefficient is higher according to the principle proved by the industry, and the acidity coefficient is lower, so that the produced fiber product has shorter fiber and poorer quality.
The manganese liquid is extracted by a gravity separation principle, and is discharged from a first discharge port 11 at the bottom due to the heavier specific gravity of the manganese liquid, and light slag liquid is discharged from a second discharge port 12 without mixing, so that the separation effect is better.
When the manganese liquid is separated, the discharge amount can be controlled in two ways, firstly, the gloss color of the manganese liquid and the gloss of light slag liquid are different, whether the manganese liquid is completely discharged can be controlled through observation, secondly, when the slag liquid is added into the quenching and tempering furnace 10, the weight of the slag liquid is calculated in advance, the mass of added coke can also be calculated, so that the mass of the reduced manganese liquid can also be calculated, and therefore, when the manganese liquid is discharged, the control can be realized by weighing the weight of the manganese liquid.
Further, the reducing agent is coke.
Further, the reducing agent is semi-coke.
Further, the semi coke is dried before being added into the quenching and tempering furnace 10, so that the moisture content in the semi coke is reduced.
Because the semi-coke is generated by low-temperature dry distillation, the dry distillation temperature is generally about 600 ℃, the moisture content in the semi-coke is higher, the semi-coke is directly added into the furnace to be used as a modifying agent, more flue gas can be introduced, the coke is generated by high-temperature dry distillation, the dry distillation temperature is generally about 1000 ℃, the moisture content is lower, the semi-coke can be directly added into the modifying furnace 10 to be used as the modifying agent, and the reduction effect is better.
Further, the acidity coefficient of the light slag liquid subjected to reduction tempering by the tempering furnace 10 is 2.0-2.4; wherein, the calculation formula of the acidity coefficient is as follows:
。
the slag liquid tempered by the method for tempering silicomanganese slag to extract manganese and preparing the slag liquid with high acidity coefficient by using the high-temperature reduction method comprises the following components in parts by mass: SiO 2235-50 parts of Al2O310-17 parts of CaO, 18-27 parts of MgO, 1-5 parts of MnO, 1-18 parts of TFe and K2O1-3 parts, Na20-2 parts of O.
Further, the silicon-manganese slag liquid consists of the following components in parts by mass: SiO 2240-50 parts of Al2O314-24 parts of CaO, 20-25 parts of MgO, 3-7 parts of MnO, 0.2-6 parts of TFe, 0.1-1 part of K20 to 1 portion of O, Na20-1 part of O.
Example 1
The silicomanganese slag comprises the following components in parts by mass: SiO 2235-50 parts of Al2O310-17 parts of CaO, 18-27 parts of MgO, 1-5 parts of MnO, 1-18 parts of TFe and K2O1-3 parts, Na20-2 parts of O.
Specifically, the silicomanganese cold slag or the hot slag is added into a quenching and tempering furnace filled with coke, and the temperature is kept at 1450 ℃ for 3 to 6 hours. At the moment, the silicomanganese slag is subjected to a series of reactions such as deep reduction, replacement and the like at high temperature, manganese is reduced and discharged independently, the acidity coefficient of the residual slag liquid of the quenching and tempering furnace is greatly increased, and a new material can be prepared.
TABLE 11450 ℃ reduction of the content of each element in the glass phase for 3-6h
| Composition (I) | MgO | SiO2 | Al2O3 | CaO | MnO |
| Content/% | 5-7 | 46-50 | 14-17 | 20-23 | 3.5-5.5 |
| Composition (I) | Fe2O3 | Na2O | K2O | ||
| Content/% | 0.1-1 | 0.2-0.5 | 0.5-0.8 |
The results in Table 1 show that metal particles appear on the surface of the glass phase and the surface of the glass phase is smooth after the silicomanganese water-quenched slag is subjected to heat preservation at 1450 ℃ for 3-6 h. The content of manganese oxide in the slag liquid is between 3.5 and 5.5 percent, and the reduction rate is more than 70 percent. The coke can fully reduce the manganese element in the silicomanganese slag at 1450 ℃, and the acidity coefficient of the reduced slag is increased to about 2.1 from about 1.63.
Acidity coefficient before reduction:
Acidity coefficient of reduced glassy phase:
example 2
The silicomanganese cold slag or the hot slag in the embodiment 1 is added into a quenching and tempering furnace filled with coke, and the temperature is kept at 1500 ℃ for 3 to 6 hours. At the moment, the silicomanganese slag is subjected to a series of reactions such as deep reduction, replacement and the like at high temperature, manganese is reduced and discharged independently, the acidity coefficient of the residual slag liquid of the quenching and tempering furnace is greatly increased, and a new material can be prepared.
Reducing the content of each element in the glass phase for 5h at the temperature of 21500 DEG C
| Composition (I) | MgO | SiO2 | Al2O3 | CaO | MnO |
| Content/% | 4-6 | 44-49 | 14-17 | 20-23 | 2-3.15 |
| Composition (I) | Fe2O3 | Na2O | K2O | ||
| Content/% | 0.1-1.0 | 0.2-0.5 | 0.5-0.8 |
The results in Table 2 show that after the silicomanganese water-quenched slag is subjected to heat preservation at 1500 ℃ for 3-6h, metal particles appear on the surface of a glass phase, and the surfaces of other glass phases are smooth. The content of manganese oxide in the slag liquid is between 2 and 3.15 percent, and the reduction rate is more than 80 percent. The coke can fully reduce the manganese element in the silicomanganese slag at 1500 ℃, and the acidity coefficient of the reduced slag is increased to about 2.2 from about 1.6.
Example 3
The silicomanganese cold slag or the hot slag is added into a quenching and tempering furnace filled with coke, and the temperature is kept at 1550 ℃ for 3 to 6 hours. At the moment, the silicomanganese slag is subjected to a series of reactions such as deep reduction, replacement and the like at high temperature, manganese is reduced and discharged independently, the acidity coefficient of the residual slag liquid of the quenching and tempering furnace is greatly increased, and a new material can be prepared.
Table 31550 deg.C, reducing for 3-6h, and the content of each element in glass phase
| Composition (I) | MgO | SiO2 | Al2O3 | CaO | MnO |
| Content/% | 5-7 | 42-47 | 14-17 | 20-23 | 1-2.5 |
| Composition (I) | Fe2O3 | Na2O | K2O | ||
| Content/% | 0.1-1.0 | 0.2-0.5 | 0.5-0.8 |
The results in Table 3 show that after the silicomanganese water-quenched slag is subjected to heat preservation at 1550 ℃ for 3-6h, metal particles appear on the surface of a glass phase, and the surfaces of other glass phases are smooth. The manganese oxide content in the slag liquid is calculated to be between 1 and 2.5 percent, and the reduction rate is more than 90 percent. The coke can fully reduce the manganese element in the silicomanganese slag at 1550 ℃, and the acidity coefficient of the reduced slag is increased to about 2.3 from about 1.6.
Acidity coefficient after reduction:
Example 4
And adding the silicomanganese cold slag or the hot slag into a quenching and tempering furnace filled with coke, and preserving the heat for 3-6 hours at 1600 ℃. At the moment, the silicomanganese slag is subjected to a series of reactions such as deep reduction, replacement and the like at high temperature, manganese is reduced and discharged independently, the acidity coefficient of the residual slag liquid of the quenching and tempering furnace is greatly increased, and a new material can be prepared.
Table 41600 deg.C reduction for 3-6h of each element content in the glass phase
| Composition (I) | MgO | SiO2 | Al2O3 | CaO | MnO |
| Content/% | 3-6 | 40-45 | 20-24 | 20-24 | 0.3-0.5 |
| Composition (I) | Fe2O3 | Na2O | K2O | ||
| Content/% | 0.1-1 | 0.2-0.5 | 0.5-0.8 |
The results in Table 4 show that metal particles appear on the surface of the glass phase and the surfaces of other glass phases are smooth after the silicomanganese water-quenched slag is subjected to heat preservation at 1600 ℃ for 3-6 h. The manganese oxide content in the slag liquid is calculated to be about 0.5%, and the reduction rate is more than 95%. The coke can fully reduce the manganese element in the silicomanganese slag at 1600 ℃, and the acidity coefficient of the reduced slag is increased to about 2.4 from about 1.6.
Acidity coefficient after reduction:
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
The above disclosure is only illustrative of the preferred embodiments of the present invention, which should not be taken as limiting the scope of the invention, but rather the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or a portion of the above-described embodiments may be practiced and equivalents thereof may be resorted to as falling within the scope of the invention as claimed. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A method for quenching and tempering silicomanganese slag to extract manganese and preparing slag liquid with high acidity coefficient by a high-temperature reduction method is characterized by comprising the following steps: laying a reducing agent at the bottom of the hardening and tempering furnace, adding silicomanganese slag into the hardening and tempering furnace, fully contacting the silicomanganese slag and the hardening and tempering furnace, keeping the temperature in the hardening and tempering furnace at 1450-1600 ℃, preserving the heat for 3-6 hours, arranging a first discharge port at the bottom of the hardening and tempering furnace, arranging a second discharge port on the side wall of the hardening and tempering furnace, wherein the height of the second discharge port is higher than that of the first discharge port, the first discharge port is used for discharging reduced manganese liquid, and the second discharge port is used for discharging light slag liquid.
2. The method for extracting manganese from silicomanganese slag and preparing slag liquid with high acidity coefficient by high-temperature reduction method according to claim 1, characterized in that: the reducing agent is coke.
3. The method for extracting manganese from silicomanganese slag and preparing slag liquid with high acidity coefficient by high-temperature reduction method according to claim 1, characterized in that: the reducing agent is semi-coke.
4. The method for extracting manganese from silicomanganese slag and preparing slag liquid with high acidity coefficient by high-temperature reduction method according to claim 3, characterized in that: the semi coke is dried before being added into a quenching and tempering furnace, so that the moisture content in the semi coke is reduced.
5. The method for extracting manganese from silicomanganese slag and preparing slag liquid with high acidity coefficient by high-temperature reduction method according to claim 1, characterized in that: the acidity coefficient of the light slag liquid subjected to reduction tempering by the tempering furnace is 2.0-2.4; wherein, the calculation formula of the acidity coefficient is as follows:
。
6. the slag liquid quenched and tempered by the method for quenching and tempering the silicomanganese slag to extract manganese and preparing the slag liquid with the high acidity coefficient according to the claim 1, wherein the method comprises the following steps: the composition comprises the following components in parts by mass: SiO 2235-50 parts of Al2O310-17 parts of CaO, 18-27 parts of MgO, 1-5 parts of MnO, 1-18 parts of TFe and K2O1-3 parts, Na20-2 parts of O.
7. The slag liquid quenched and tempered by the method for quenching and tempering the silicomanganese slag to extract manganese and preparing the slag liquid with the high acidity coefficient according to claim 1, wherein the method comprises the following steps: the composition comprises the following components in parts by mass: SiO 2240-50 parts of Al2O314-24 parts of CaO20-25 parts of MgO 3-7 parts of MnO 0.2-6 parts of TFe 0.1-1 parts of K20 to 1 portion of O, Na20-1 part of O.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114292045A (en) * | 2021-10-11 | 2022-04-08 | 湖南绿生永固新材料有限公司 | Green concrete admixture of silicomanganese smelting slag and preparation method thereof |
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