CN102367514B - Mn-Fe composite pellet and preparation method thereof - Google Patents
Mn-Fe composite pellet and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a Mn-Fe composite pellet and a preparation method thereof. The Mn-Fe composite pellet comprises, by weight, 27.68% of Mn, 5.37% of Fe, 0.09% of P, 9.86% of SiO2, 11.7% of CaO and 4.42% of Mg, wherein the Mn/Fe weight ratio is 5.15:1, and the compressive strength of the Mn-Fe composite pellet is 35-45MPa. According to embodiments in the invention, the reduction of the Mn/Fe weight ratio of the composite pellet allows the charged grade to be improved, so the Mn recovery rate is improved and the power consumption is reduced.
Description
Technical field
The present invention relates to Mn series alloy raw material production field, particularly, relate to a kind of ferromanganese composite pellet and preparation method thereof.
Background technology
In the production of Mn series alloy (for example high carbon ferromanganese), the requirement of strictness is arranged for the content of each composition in the high carbon ferromanganese.For example, among the high carbon ferromanganese FeMn78C8.0, the weight percent of Mn is greater than 75%, and Mn-Fe ratio (Mn/Fe) is 7.18.Yet, in the existing raw material (for example manganic concerntrate, primary ore), Mn-Fe ratio height (generally greater than 9) must add a certain amount of iron ore in process of production, can cause reducing into the stove grade and add iron ore, thereby cause every economic and technical norms such as power consumption, the rate of recovery undesirable.
Summary of the invention
The present invention is intended to solve at least one of technical problem that exists in the prior art.For this reason, the present invention need provide a kind of ferromanganese composite pellet than the spiegel iron weight ratio and preparation method thereof that has.
According to an aspect of the present invention, provide a kind of ferromanganese composite pellet.By weight percentage, described ferromanganese composite pellet comprises 27.68% manganese, 5.37% iron, 0.09% phosphorus, 9.86% silicon-dioxide, 11.7% calcium oxide and 4.42% magnesium, wherein the ferromanganese weight ratio is 5.15: 1, and the ultimate compression strength of described ferromanganese composite pellet is 35～45MPa.
According to embodiments of the invention, by reducing the ferromanganese weight ratio of composite pellet, can improve into the stove grade, and then improve manganese recovery ratio, reduce power consumption.
According to another aspect of the present invention, also provide a kind of method for preparing the ferromanganese composite pellet.The described method for preparing the ferromanganese composite pellet may further comprise the steps: a) raw mix that will be formed by the rich manganese ore powder of magnetic separation fine concentrate, magnetic separation, collected ash and ferric manganese ore powder and binding agent and water mixed grind 3～10 minutes in mixing pan, to obtain solid powder mixture; B) described solid powder mixture is carried out pressure ball in ball press under predetermined pressure ball roller rotating speed and predetermined roll gap pressure, to obtain wet bulb group; And c) with described wet bulb group in drying kiln under preset temperature dry 1～11 hour, to obtain described ferromanganese composite pellet, wherein said ferromanganese composite pellet comprises 27.68% manganese, 5.37% iron, 0.09% phosphorus, 9.86% silicon-dioxide, 11.7% calcium oxide and 4.42% magnesium oxide, the ferromanganese weight ratio is 5.15: 1, and the ultimate compression strength of described ferromanganese composite pellet is 35～45MPa.
According to embodiments of the invention, by the ferric manganese ore powder being added in the mixture that magnetic separation fine concentrate, the rich manganese ore powder of magnetic separation and collected ash form and carrying out mixed grind, pressure ball and dry to obtain the ferromanganese composite pellet, can reduce the ferromanganese weight ratio of composite pellet effectively, go into the stove grade thereby improve, and then the raising manganese recovery ratio, reduce power consumption.
In addition, the method for preparing the ferromanganese composite pellet according to the above embodiment of the present invention can also have following additional technical characterictic:
According to one embodiment of present invention, gross weight with described raw mix is benchmark, and the content of described magnetic separation fine concentrate is 40%, and the content of the rich manganese ore powder of described magnetic separation is 20%, the content of described collected ash is 30%, and the content of described ferric manganese ore powder is 10%.According to embodiments of the invention, by preparing composite pellet in the mixture that the ferric manganese ore powder is added magnetic separation fine concentrate, the rich manganese ore powder of magnetic separation and collected ash composition, can reduce the ferromanganese weight ratio of composite pellet effectively, go into the stove grade thereby improve.
According to one embodiment of present invention, by weight percentage, described ferric manganese ore powder contains 19.03% manganese, 31.22% iron, 0.121% phosphorus and 2.76% silicon-dioxide.Because the ferric manganese ore powder contains the higher iron of weight percentage, can reduce the ferromanganese weight ratio of composite pellet thus effectively.
According to one embodiment of present invention, by weight percentage, described magnetic separation fine concentrate comprises 25.65% manganese, 2.26% iron, 0.094% phosphorus, 11.06% silicon-dioxide, 14.67% calcium oxide and 3.24% magnesium oxide.
According to one embodiment of present invention, by weight percentage, the rich manganese ore powder of described magnetic separation comprises 30.06% manganese, 2.58% iron, 0.062% phosphorus, 14.11% silicon-dioxide, 19.5% calcium oxide and 6.01% magnesium oxide.
According to one embodiment of present invention, by weight percentage, described collected ash comprises 23.04% manganese, 2.79% iron, 0.094% phosphorus, 7.8% silicon-dioxide, 4.72% calcium oxide and 6.41% magnesium oxide.
According to one embodiment of present invention, described binding agent is made up of sodium hydroxide, Sodium Silicofluoride and starch.Thus, can guarantee the ultimate compression strength of composite pellet.
According to one embodiment of present invention, described predetermined pressure ball roller rotating speed is 2～10 rev/mins, and described predetermined roll gap pressure is 4～12MPa.
According to one embodiment of present invention, described preset temperature is 180～220 degrees centigrade.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schema according to the method for preparing the ferromanganese composite pellet of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
According to an aspect of the present invention, provide a kind of ferromanganese composite pellet.According to embodiments of the invention, by weight percentage, described ferromanganese composite pellet comprises 27.68% manganese, 5.37% iron, 0.09% phosphorus, 9.86% silicon-dioxide, 11.7% calcium oxide and 4.42% magnesium, wherein the ferromanganese weight ratio is 5.15: 1, and the ultimate compression strength of described ferromanganese composite pellet is 35～45MPa.
According to embodiments of the invention, by reducing the ferromanganese weight ratio of composite pellet, can improve into the stove grade, and then improve manganese recovery ratio, reduce power consumption.
According to embodiments of the invention, the ultimate compression strength of described ferromanganese composite pellet adopts ergometer to detect.After ergometer detected, the ultimate compression strength of ferromanganese composite pellet was 35～45MPa, shows that pellet quality is qualified.
According to another aspect of the present invention, also provide a kind of method for preparing the ferromanganese composite pellet.
Understand for convenience, describe the preparation method of above-mentioned ferromanganese composite pellet below with reference to Fig. 1.
With reference to figure 1, according to embodiments of the invention, the method for preparing the ferromanganese composite pellet may further comprise the steps.
At first, as shown in Figure 1, the raw mix that will be made up of the rich manganese ore powder of magnetic separation fine concentrate, magnetic separation, collected ash and ferric manganese ore powder and binding agent and water mixed grind 3～10 minutes in mixing pan is to obtain solid powder mixture.
According to embodiments of the invention, gross weight with described raw mix is benchmark, and the content of described magnetic separation fine concentrate is 40%, and the content of the rich manganese ore powder of described magnetic separation is 20%, the content of described collected ash is 30%, and the content of described ferric manganese ore powder is 10%.According to embodiments of the invention, by preparing composite pellet in the mixture that the ferric manganese ore powder is added magnetic separation fine concentrate, the rich manganese ore powder of magnetic separation and collected ash composition, can reduce the ferromanganese weight ratio of composite pellet effectively, go into the stove grade thereby improve.
According to embodiments of the invention, by weight percentage, described ferric manganese ore powder contains 19.03% manganese, 31.22% iron, 0.121% phosphorus and 2.76% silicon-dioxide.According to embodiments of the invention, because the ferric manganese ore powder contains the higher iron of weight percentage, can reduce the ferromanganese weight ratio of composite pellet thus effectively.
According to embodiments of the invention, by weight percentage, described magnetic separation fine concentrate comprises 25.65% manganese, 2.26% iron, 0.094% phosphorus, 11.06% silicon-dioxide, 14.67% calcium oxide and 3.24% magnesium oxide.
According to embodiments of the invention, by weight percentage, the rich manganese ore powder of described magnetic separation comprises 30.06% manganese, 2.58% iron, 0.062% phosphorus, 14.11% silicon-dioxide, 19.5% calcium oxide and 6.01% magnesium oxide.
According to embodiments of the invention, by weight percentage, described collected ash comprises 23.04% manganese, 2.79% iron, 0.094% phosphorus, 7.8% silicon-dioxide, 4.72% calcium oxide and 6.41% magnesium oxide.
According to embodiments of the invention, the type of binding agent is not particularly limited, as long as thereby can provide enough cohesive forces to guarantee the ultimate compression strength of composite pellet.According to a concrete example of the present invention, described binding agent is made up of sodium hydroxide, Sodium Silicofluoride and starch.According to embodiments of the invention, the consumption of binding agent is 1.5～2.5% of above-mentioned raw materials mixture weight.
According to embodiments of the invention, the type of mixing pan is not particularly limited, as long as above-mentioned raw materials can be become solid powder mixture with the binding agent mixed grind.According to a concrete example of the present invention, the planetary mixed grind mixing machine LNX-2000 of mixing pan for being purchased from Nanchang spark lathe company limited.In mixing pan, it is also wetting that above-mentioned raw materials mixture, caking agent and water are fully contacted, to obtain uniform solid powder mixture.
After mixed grind, as shown in Figure 1, described solid powder mixture is carried out pressure ball in ball press under predetermined pressure ball roller rotating speed and predetermined roll gap pressure, to obtain wet bulb group.
According to embodiments of the invention, predetermined pressure ball roller rotating speed and predetermined roll gap pressure are not particularly limited, as long as thereby above-mentioned solid powder mixture pressure ball can be obtained wet bulb group.According to examples more of the present invention, described predetermined pressure ball roller rotating speed is 2～10 rev/mins, and described predetermined roll gap pressure is 4～12MPa.According to a concrete example of the present invention, described predetermined pressure ball roller rotating speed is 4～8 rev/mins, and described predetermined roll gap pressure is 5～9.5MPa.
According to embodiments of the invention, the type of ball press is not particularly limited, as long as thereby above-mentioned solid powder mixture pressure ball can be obtained wet bulb group.According to a concrete example of the present invention, the ball press GYQ800 of described ball press for being purchased from Xuelang Conveying Machine Co., Ltd. Wuxi.In ball press, above-mentioned solid powder mixture is carried out pressure ball under these conditions, thereby obtain wet bulb group.Wet bulb group falls three times in the 1m eminence, does not take place to destroy to qualified.
After pressure ball, as shown in Figure 1, with described wet bulb group in drying kiln under preset temperature dry 1～11 hour, to obtain described ferromanganese composite pellet.
According to embodiments of the invention, described preset temperature is not particularly limited, as long as can carry out drying to above-mentioned wet bulb group.According to examples more of the present invention, described preset temperature is 180～220 degrees centigrade.According to a concrete example of the present invention, described preset temperature is 200 degrees centigrade.
According to embodiments of the invention, the type of drying kiln is not particularly limited, as long as thereby can carry out drying to above-mentioned wet bulb group obtains described ferromanganese composite pellet.According to a concrete example of the present invention, drying kiln mainly is made up of drying grate, twin-stage cycloid speed reducer and induced draft fan.In drying grate, the centre of sprocket distance is 36 meters.The twin-stage cycloid speed reducer XWED116-5133-3KW of twin-stage cycloid speed reducer for being purchased from state luxuriant step-down gear group company.The induced draft fan Y5-48NO8C-7-37KW of induced draft fan for being purchased from Dali universal machine works.In drying kiln, above-mentioned wet bulb is rolled into a ball at 180～220 degrees centigrade to descend dry 1～11 hour, to obtain described ferromanganese composite pellet.
According to embodiments of the invention, by weight percentage, described ferromanganese composite pellet comprises 27.68% manganese, 5.37% iron, 0.09% phosphorus, 9.86% silicon-dioxide, 11.7% calcium oxide and 4.42% magnesium, wherein the ferromanganese weight ratio is 5.15: 1, and the ultimate compression strength of described ferromanganese composite pellet is 35～45MPa.
According to embodiments of the invention, by the ferric manganese ore powder being added in the mixture that magnetic separation fine concentrate, the rich manganese ore powder of magnetic separation and collected ash form and carrying out mixed grind, pressure ball and dry to obtain the ferromanganese composite pellet, can reduce the ferromanganese weight ratio of composite pellet effectively, go into the stove grade thereby improve, and then the raising manganese recovery ratio, reduce power consumption.
According to a further aspect of the invention, also provide and adopt above-mentioned ferromanganese composite pellet to prepare the method for high carbon ferromanganese.The method for preparing high carbon ferromanganese may further comprise the steps.At first, the ferromanganese composite pellet of 180 weight parts, the rich manganese ore powder of magnetic separation of 110 weight parts, the ore deposit, South Africa of 240 weight parts and the primary ore of 70 weight parts are added in the electric furnace, the coke that adds 110 weight parts is then smelted, to obtain containing the molten slurry of high carbon ferromanganese.Then, separate described high carbon ferromanganese from the described molten slurry that contains high carbon ferromanganese.
In coke, the content of fixed carbon is greater than 78 weight %, and the granularity of coke is 5～20mm.
Describe the present invention below in conjunction with embodiment.
Embodiment 1
In mixing pan, with the ferric manganese ore powder of the collected ash of the rich manganese ore powder of the magnetic separation of the magnetic separation fine concentrate of 40 weight parts, 20 weight parts, 30 weight parts, 10 weight parts, 1.5 parts by weight of adhesive and suitable quantity of water mixed grind 6 minutes, to obtain solid powder mixture.Then, in ball press, solid powder mixture is carried out pressure ball under the roll gap pressure of 6 rev/mins pressure ball roller rotating speed and 5Mpa, to obtain wet bulb group.At last, in drying kiln, wet bulb group was descended dry 3 hours at 200 degrees centigrade, to obtain the ferromanganese composite pellet.Detect through ergometer, the ultimate compression strength of composite pellet is 36MPa, shows that pellet quality is qualified.
Embodiment 2
In mixing pan, just the ferric manganese ore powder of the collected ash of the rich manganese ore powder of the magnetic separation of the magnetic separation fine concentrate of 40 weight parts, 20 weight parts, 30 weight parts, 10 weight parts, 2 parts by weight of adhesive and suitable quantity of water mixed grind are 7 minutes, to obtain solid powder mixture.Then, in ball press, solid powder mixture is carried out pressure ball under the roll gap pressure of 8 rev/mins pressure ball roller rotating speed and 4Mpa, to obtain wet bulb group.At last, in drying kiln, wet bulb group was descended dry 2.5 hours at 180 degrees centigrade, to obtain the ferromanganese composite pellet.Detect through ergometer, the ultimate compression strength of composite pellet is 38MPa, shows that pellet quality is qualified.
Embodiment 3
In mixing pan, just the ferric manganese ore powder of the collected ash of the rich manganese ore powder of the magnetic separation of the magnetic separation fine concentrate of 40 weight parts, 20 weight parts, 30 weight parts, 10 weight parts, 2.5 parts by weight of adhesive and suitable quantity of water mixed grind are 8 minutes, to obtain solid powder mixture.Then, in ball press, solid powder mixture is carried out pressure ball under the roll gap pressure of 9 rev/mins pressure ball roller rotating speed and 7Mpa, to obtain wet bulb group.At last, in drying kiln, wet bulb group was descended dry 5 hours at 210 degrees centigrade, to obtain the ferromanganese composite pellet.Detect through ergometer, the ultimate compression strength of composite pellet is 40MPa, shows that pellet quality is qualified.
Embodiment 4
In mixing pan, just the ferric manganese ore powder of the collected ash of the rich manganese ore powder of the magnetic separation of the magnetic separation fine concentrate of 40 weight parts, 20 weight parts, 30 weight parts, 10 weight parts, 2.3 parts by weight of adhesive and suitable quantity of water mixed grind are 8 minutes, to obtain solid powder mixture.Then, in ball press, solid powder mixture is carried out pressure ball under the roll gap pressure of 7.5 rev/mins pressure ball roller rotating speed and 6Mpa, to obtain wet bulb group.At last, in drying kiln, wet bulb group was descended dry 4 hours at 190 degrees centigrade, to obtain the ferromanganese composite pellet.Detect through ergometer, the ultimate compression strength of composite pellet is 39MPa, shows that pellet quality is qualified.
Application Example 1
The ferromanganese composite pellet of preparation among the embodiment 1 of 180t, the rich manganese ore powder of magnetic separation of 110t, the ore deposit, South Africa of 240t and the primary ore of 70t are added in the 12500KVA ore-smelting furnace, and the coke that adds 110t is then smelted, to obtain containing the molten slurry of high carbon ferromanganese.Then, the molten slurry that contains high carbon ferromanganese is separated, to obtain high carbon ferromanganese A1.Measure it and go into stove grade, manganese recovery ratio, output, power consumption, its result is as shown in table 1.
Go into the stove grade and refer to the weight percent of manganese element in the stove ore, that is,
Go into stove grade=(go into the gross weight of manganese element in the stove ore/go into the gross weight of stove ore) * 100%
Wherein, going into the stove ore is made up of ferromanganese composite pellet, the rich manganese ore powder of magnetic separation, ore deposit, South Africa and primary ore.
Manganese recovery ratio=(weight of manganese element in the high carbon ferromanganese/go into the gross weight of manganese element in the stove ore) * 100%
Comparative Examples 1
The primary ore of Nan Feikuang, the 70t of the rich manganese ore powder of the magnetic separation of the general ferromanganese composite pellet of 180t, 110t, 240t and the iron ore of 20t are added in the 12500KVA ore-smelting furnace, and the coke that adds 110t is then smelted, to obtain containing the molten slurry of high carbon ferromanganese.By weight percentage, general ferromanganese composite pellet comprises 25.9% manganese, 2.67% iron, 0.067% phosphorus, 12.44% silicon-dioxide, 9.26% calcium oxide and 1.83% magnesium oxide, and iron ore comprises 48.23% iron.Then, the molten slurry that contains high carbon ferromanganese is separated, to obtain high carbon ferromanganese B1.Measure it and go into stove grade, manganese recovery ratio, output, power consumption, its result is as shown in table 1.
Table 1
As can be seen from Table 1, compare with the high carbon ferromanganese that adopts general ferromanganese composite pellet preparation, adopt the high carbon ferromanganese according to the ferromanganese composite pellet preparation of the embodiment of the invention, go into the stove grade and improved 6.5%, manganese recovery ratio has improved 2.2%, and power consumption has reduced by 1.9%.If produce 25000 tons of high carbon ferromanganeses in 1 year, power consumption can reduce 150000kwh/t.Thus, can reduce production costs significantly.
According to embodiments of the invention, by the ferric manganese ore powder being added in the mixture that magnetic separation fine concentrate, the rich manganese ore powder of magnetic separation and collected ash form and carrying out mixed grind, pressure ball and dry to obtain the ferromanganese composite pellet, can reduce the ferromanganese weight ratio of composite pellet effectively, go into the stove grade thereby improve, and then the raising manganese recovery ratio, reduce power consumption.
In the description of this specification sheets, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment under the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.
Claims (13)
1. a ferromanganese composite pellet is characterized in that, by weight percentage, described ferromanganese composite pellet comprises 27.68% manganese, 5.37% iron, 0.09% phosphorus, 9.86% silicon-dioxide, 11.7% calcium oxide and 4.42% magnesium oxide, wherein
The ultimate compression strength of described ferromanganese composite pellet is 35 ~ 45MPa.
2. a method for preparing the ferromanganese composite pellet is characterized in that, may further comprise the steps:
A) raw mix that will be made up of the rich manganese ore powder of magnetic separation fine concentrate, magnetic separation, collected ash and ferric manganese ore powder and binding agent and water mixed grind 3 ~ 10 minutes in mixing pan is to obtain solid powder mixture;
B) described solid powder mixture is carried out pressure ball in ball press under predetermined pressure ball roller rotating speed and predetermined roll gap pressure, to obtain wet bulb group; And
C) with described wet bulb group in drying kiln under preset temperature dry 1 ~ 11 hour, to obtain described ferromanganese composite pellet, wherein
Described ferromanganese composite pellet comprises 27.68% manganese, 5.37% iron, 0.09% phosphorus, 9.86% silicon-dioxide, 11.7% calcium oxide and 4.42% magnesium oxide, and the ultimate compression strength of described ferromanganese composite pellet is 35 ~ 45MPa.
3. the method for preparing the ferromanganese composite pellet according to claim 2, it is characterized in that, gross weight with described raw mix is benchmark, the content of described magnetic separation fine concentrate is 40%, the content of the rich manganese ore powder of described magnetic separation is 20%, the content of described collected ash is 30%, and the content of described ferric manganese ore powder is 10%.
4. according to claim 2 or the 3 described methods that prepare the ferromanganese composite pellet, it is characterized in that by weight percentage, described ferric manganese ore powder contains 19.03% manganese, 31.22% iron, 0.121% phosphorus and 2.76% silicon-dioxide.
5. according to claim 2 or the 3 described methods that prepare the ferromanganese composite pellet, it is characterized in that, by weight percentage, described magnetic separation fine concentrate comprises 25.65% manganese, 2.26% iron, 0.094% phosphorus, 11.06% silicon-dioxide, 14.67% calcium oxide and 3.24% magnesium oxide.
6. according to claim 2 or the 3 described methods that prepare the ferromanganese composite pellet, it is characterized in that, by weight percentage, the rich manganese ore powder of described magnetic separation comprises 30.06% manganese, 2.58% iron, 0.062% phosphorus, 14.11% silicon-dioxide, 19.5% calcium oxide and 6.01% magnesium oxide.
7. according to claim 2 or the 3 described methods that prepare the ferromanganese composite pellet, it is characterized in that, by weight percentage, described collected ash comprises 23.04% manganese, 2.79% iron, 0.094% phosphorus, 7.8% silicon-dioxide, 4.72% calcium oxide and 6.41% magnesium oxide.
8. the method for preparing the ferromanganese composite pellet according to claim 2 is characterized in that, described binding agent is made up of sodium hydroxide, Sodium Silicofluoride and starch.
9. the method for preparing the ferromanganese composite pellet according to claim 2 is characterized in that, described predetermined pressure ball roller rotating speed is 2 ~ 10 rev/mins, and described predetermined roll gap pressure is 4 ~ 12MPa.
10. the method for preparing the ferromanganese composite pellet according to claim 4 is characterized in that, described preset temperature is 180 ~ 220 degrees centigrade.
11. the method for preparing the ferromanganese composite pellet according to claim 5 is characterized in that, described preset temperature is 180 ~ 220 degrees centigrade.
12. the method for preparing the ferromanganese composite pellet according to claim 6 is characterized in that, described preset temperature is 180 ~ 220 degrees centigrade.
13. the method for preparing the ferromanganese composite pellet according to claim 7 is characterized in that, described preset temperature is 180 ~ 220 degrees centigrade.
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| CN104651605B (en) * | 2015-02-06 | 2018-05-25 | 唐竹胜 | A kind of preparation method of cooled agglomerated pellet |
| CN107338364A (en) * | 2017-06-15 | 2017-11-10 | 江苏省冶金设计院有限公司 | A kind of method for preparing ferromanganese pearl |
| CN110373602A (en) * | 2019-07-31 | 2019-10-25 | 游峰 | A kind of master alloy additive and the preparation method and application thereof |
| CN111944994B (en) * | 2020-06-30 | 2021-07-20 | 湖南大学 | Preparation method of manganese-containing powder pressed pellet with self-reducing performance |
| CN115029549A (en) * | 2022-06-14 | 2022-09-09 | 广西科技大学 | Preparation method of carbon-containing silicon-manganese alloy fly ash pellets |
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