CN107828930A - A kind of high phosphorus high ferro difficulty selects the method that the deferrization of manganese ore dephosphorization produces ultrapure Mn-rich slag - Google Patents
A kind of high phosphorus high ferro difficulty selects the method that the deferrization of manganese ore dephosphorization produces ultrapure Mn-rich slag Download PDFInfo
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- CN107828930A CN107828930A CN201711104290.4A CN201711104290A CN107828930A CN 107828930 A CN107828930 A CN 107828930A CN 201711104290 A CN201711104290 A CN 201711104290A CN 107828930 A CN107828930 A CN 107828930A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- 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
Abstract
The present invention relates to a kind of method that difficulty of high phosphorus high ferro selects manganese ore dephosphorization deferrization production Mn-rich slag; including by crushing raw ore, screen out 5~20mm particle after; by reducing agent of its weight than being less than 3mm with addition of 20~30%, fineness; then by the iron oxide drastic reduction in manganese ore; material after reduction is cooled down under coal dust covering or inert gas shielding, separated the material after reduction with the coal dust remained using the method for screening or magnetic separation；Sub- manganese ore after iron is reduced, which is sent to melt, divides stove, any reducing agent and sludging flux are not added, divide by being melted under 1700~1850 DEG C of high temperature, most P are made to be gasified and entered in molten iron (P >=0.6%), realize that manganese thoroughly separates with iron, manganese with phosphorus, liquid " slag " leading indicator emitted is：Fe≤3.0%, Mn >=60%, P≤0.08%, Mn/Fe20~22, it is exactly ultrahigh quality manganous oxide residue product.
Description
Technical field
The present invention relates to a kind of method of Smelting Plant, more particularly to a kind of high phosphorus high ferro difficulty to select the deferrization of manganese ore dephosphorization to produce
The method of ultrapure Mn-rich slag, belongs to metallurgical technology field.
Background technology
World land manganese resource is relatively abundanter, but distribution is very uneven, and manganese resource is mainly distributed on South Africa, Wu Ke
The countries such as orchid, Australia, India, China, Gabon, Brazil and Mexico.South Africa and Ukraine are that manganese resource is most in the world
Two abundant countries, South Africa manganese resource account for the 77% of world's manganese resource, and Ukraine accounts for 10%.World's pelagite
And cobalt tuberculosis resource is also very abundant, is the important potential resource of manganese ore.China's manganese ore is mainly distributed on Xiang Nan, Taojiang-Ningxiang
Area, Southwest Guangxi, Luoding, guangdong basin, southwest Fujian-Yue Dongbei, Tongren district Guizhou Province-loose peach area, Lancang, yunnan river middle and lower reaches
Area, Zhenba County Shaanxi Province-Chengkou, Chongqing, Sichuan Basin's edge, Western Tianshan, Xijiang come to life-and geostationary area, Altun Mountains, Xinjiang northern foot etc.
Ground, these regional manganese resources account for the 38% of national total reserves.
Rich manganese ore (manganese oxide ore is more than 30%, manganese carbonate ore containing manganese and is more than 25% containing manganese) at this stage in the world is soon
It can exploit, and the poor manganese ore of rich reserves, ferric manganese ore, the comprehensive development and utilization of high ferro high-phosphorus manganese, just turn into industry
Cardinal task.Due to high phosphorus, ferric manganese ore stone grade is low, impure high, fine size, most manganese ore deposit category particulates or fine
The embedding cloth of grain, sorts difficulty, its technology processing characteristics is undesirable so as to add.Because smelting the Mn series alloy of the various trades mark
In, manganese content and ferromanganese ratio to ore are to have certain requirements.In smelting, low-carbon ferromanganese, ore manganese content is generally
36%~40%, Mn-Fe ratio 6~8.5, that is, iron content require 5%~6%, phosphorus manganese than 0.002~0.0036, that is, phosphorus
Content requirement 0.07%~0.15%；Smelting carbon ferromanganese, ore manganese content 33%~40%, Mn-Fe ratio 3.8~7.8, also
Be iron content requirement 5%~9%, phosphorus manganese than 0.002~0.005, that is, phosphorus content requirement 0.06%~0.2%；Smelting manganese
Silicon alloy, ore manganese content 29%~35%, Mn-Fe ratio 3.3~7.5, that is, iron content requirement 5%~9%, phosphorus manganese ratio
0.0016~0.0048, that is, phosphorus content requirement 0.05%~0.17%；Blast furnace ferromanganese, ore manganese content 30%, Mn-Fe ratio 2
~7, that is, iron content requirement 5%~15%, phosphorus manganese is than 0.005, that is, phosphorus content requirement is less than 0.15%.Therefore, manganese
Iron in ore content, no more than 0.2%, otherwise just turns into ferric manganese ore or high phosphorus high ferro typically no more than 15%, phosphorus content
Manganese ore.
P in manganese ore is mainly closely common with manganese mineral in the form of apatite or carbon (acid) apatite (also referred to as glue apatite)
It is raw, contaminate in the edge of manganese ore composition granule, or be embedded in quartz or carbonate mineral, phosphorite crystal is mainly in the form of a column, pin
Shape, collection are brilliant or shot edge is distributed in the mineral of manganese ore and gangue, granularity very little, its granularity mostly in 0.0813~0.1455mm,
Therefore, apatite is difficult to using conventional beneficiation method separation, and this is also the undesirable main reason of traditional manganese ore dephosphorization effect
By foundation.
And the difficulty of high phosphorus high ferro selects manganese ore to reach the purpose of deferrization dephosphorization enrichment manganese, pyrometallurgical smelting can be typically taken
Mode.The method of traditional pyrolytic semlting manganese ore mainly has：The methods of blast furnace process, mining and metallurgy oven process, converter process.Its Smelting Plant is rich
The method of manganese slag is that substantial amounts of reducing agent (reducing agent such as coke, anthracite, charcoal, semi-coke, graphite) and slag making are added in stove
Agent (lime, dolomite, fluorite etc.), iron oxide can thoroughly be reduced and melted by this method in stove using the high temperature of burner hearth is divided into liquid
State, while also manganese oxide is reduced into manganese metal and also melted and is divided into liquid, it is medium that this method can directly produce high carbon ferromanganese, fero-manganesesilicon etc.
Ferroalloy productor, but if all selecting manganese ore to be smelted using high phosphorus high ferro difficulty, P indexs one in its ferroalloy productor
It is fixed higher, it can not smelt qualified ferroalloy productor, because high phosphorus high ferro difficulty is selected in manganese ore, iron is high, phosphorus is high, manganese grade is low,
The high value added products such as manganese metal can not be smelted；If smelt Mn-rich slag, its index be generally Mn35~50%, P >=
0.25% common Mn-rich slag product, and do not reach the index of the ultrapure Mn-rich slag of Mn >=60% always, high phosphorus high ferro difficulty selects manganese
In ore deposit iron content again it is higher, therefore, at present for such ore deposit can only partly be added in qualified ore deposit carry out with ore deposit use.
In summary, the method that the pyrolytic semlting such as traditional blast furnace process, mining and metallurgy oven process, converter process produces common Mn-rich slag,
Its effect does not reach the index of ultrapure Mn-rich slag nor highly desirable.
The content of the invention
The present invention for existing high phosphorus high ferro difficulty select Mineral Processing For Manganese Ore, present on smelting process it is insufficient, there is provided Yi Zhonggao
Phosphorus high ferro difficulty selects the method that the deferrization of manganese ore dephosphorization produces ultrapure Mn-rich slag.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of high phosphorus high ferro difficulty selects the method that the deferrization of manganese ore dephosphorization produces ultrapure Mn-rich slag, comprises the following steps：
1) by the manganese ore crushing raw ore of high phosphorus high ferro, the particle raw ore that particle diameter is 5~20mm is screened out；
2) material to be restored is made with addition of reducing agent of the particle diameter less than 3mm into particle raw ore obtained by step 1), wherein matching somebody with somebody
The amount for adding reducing agent is the 20~30% of ore quality；
3) material to be restored is placed in kiln progress 2~2.5h of drastic reduction, oxygen at a temperature of 1000~1050 DEG C
Change iron and be reduced into metallic iron；Manganese oxide, manganese carbonate are reduced into manganous oxide, by the material after reduction in coal dust covering or lazy
Property gas shield under cool down, using screening or magnetic separation method by the material after reduction with residual coal dust separate；
4) by the material after reduction be sent into it is molten divide stove, need not add reducing agent and sludging flux in furnace charge, in 1700~
Molten point of acid slag making is carried out at a temperature of 1850 DEG C, the phosphorus for being reduced out is combined into the molten iron of liquid with iron, molten iron with
The separation of liquid Mn-rich slag, layering, release high phosphorus hot metal and " slag " afterwards and cool down, obtain high ferrophosphorus and ultrapure rich manganese respectively from stove
Slag frit (ultrapure Mn-rich slag index typically requires Fe≤5.0%, Mn >=60%, P≤0.1%).
The action principle of the inventive method is described below：
1) high phosphorus high ferro difficulty is selected to the iron oxide low temperature drastic reduction in manganese ore, strictly the temperature of control reduction, temperature are low
When 1000 DEG C, the iron oxide drastic reduction effect of ore does not reach, and reaction is not fierce, and temperature is higher than 1080 DEG C, manganese oxide, carbon
Sour manganese begins to be reduced into manganese metal, influences the yield and quality of manganous oxide product, therefore strict controls the reduction temperature to be
1000~1050 DEG C；
2) iron oxide is reduced into metallic iron and manganese oxide, manganese carbonate is reduced into the sub- manganese ore block of manganous oxide and sent
After entering to melt and dividing in stove, reducing agent and sludging flux are not added, 1700~1850 DEG C of high temperature melting point is directly carried out, after reduction
Sub- manganese ore block surface contain the coal dust or the minimal amount of reducing agent particle of residual of residual attachment, make to remain neutral gas in burner hearth
Atmosphere, at least in the absence of oxidizing atmosphere, part P is reduced gasification and fall, metallic iron is gathered into half steel of liquid by high temperature melting point
Water, most P are with Fe2P and Fe3P form enters in half steel water, and the course of reaction occurred in the process is as follows：
When fire box temperature >=1200 DEG C：SiO in mineral23CaOP can be promoted2O5Reduction：
2(3CaO·P2O5)+3(SiO2)+10C=3 (3CaOSiO2)+4[P]+10CO↑
When fire box temperature >=1500 DEG C：
(3CaO·P2O5)+5 [C]=3CaO+2 [P]+5CO ↑
Therefore, when burner hearth at a sufficient temperature, SiO2Presence, promote P reduction；And few portion is still remained in burner hearth
Divide reducing agent, then from 3CaOP2O5In the P that displaces2O5Readily volatilized (300 DEG C of distillations), meets and is reduced with C.Reduction
[P] out can be combined with [Fe] and be readily generated very stable [Fe2P] and [Fe3P]；The blast furnace conventional on said process,
A large amount of practices of the smeltings such as mining and metallurgy stove all prove：When furnace charge is low-phosphorous furnace charge, P almost all enters in ferroalloy or molten iron；
When furnace charge is high phosphorus furnace charge, most P are volatilized and with Fe2P and Fe3P form enters in molten iron, and only 5%~15%
Minimal amount of P enters in clinker.
3) present invention does not divide addition slag former (lime, dolomite, fluorite etc.) in stove toward molten, is to divide smelting to not reduce to melt
Isolated after refining so-called " slag " --- Mn grade in ultrapure Mn-rich slag, therefore, the basicity of the molten slag divided in stove of the invention
Typically in R≤0.3, belong to acid slag.
The beneficial effects of the invention are as follows：
1) present invention uses iron oxide drastic reduction, and manganese oxide, manganese carbonate are reduced into manganous oxide --- and acid slag making is high
The molten two step straightforward procedures for being divided to dephosphorization deferrization of temperature, you can obtain half steel water byproduct rich in P >=0.6% and so-called " slag "
Product, the Main Ingredients and Appearance of " slag " are：Fe≤3.0%, Mn >=60%, P≤0.08%, Mn/Fe20~22, it is low-phosphorous to realize production
The breakthrough of the low high-purity Mn-rich slag technology of iron, is ferroalloy and the quantum jump of field of hydrometallurgy, will substantially reduce ferroalloy smelting
This is smelt, more preferable ultrapure Mn-rich slag raw material is provided for production high-quality manganese metal and hydrometallurgy salt product.
2) ultrapure Mn-rich slag product obtained by the inventive method may be applied not only to pyrogenic process ferromanganese, fero-manganesesilicon, manganese metal
Smelt, also may be directly applied to the hydrometallurgy industry of electrolytic manganese, manganese salt product, its added value of product is high, and application field is extensive.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the reducing agent described in step 2) is any in coal dust, charcoal, coke powder, semi-coke or biological material
It is a kind of.
Further, described biological material is any one in straw or wood chip.
Further, the kiln described in step 3) is any one in flame-insulating type rotary kiln and internal combustion type rotary kiln.
Further, the kiln described in step 3) is flame-insulating type rotary kiln.
Embodiment
The principle and feature of the present invention are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Manganese ore raw material used in 1-3 of the embodiment of the present invention is the manganese ore of African country of Gabon, and its raw ore refers mainly to
Mark is as shown in table 1：
The leading indicator of African state of Gabon manganese ore of table 1
Embodiment 1：
1) manganese ore of state of Gabon is crushed, screens out the particle raw ore that particle diameter is 5~20mm, be dried for standby；
2) high-quality anthracite is crushed, the anchracite duff that particle diameter is below 3mm is screened out, into the particle raw ore of step 1)
With addition of anchracite duff, obtained material to be restored is simply mixed in the two, wherein the amount with addition of anchracite duff is the 30% of ore quality；
3) material to be restored is loaded in ￠ 315mm × 3m flame-insulating type rotary kiln, carried out at a temperature of 1050 DEG C deep
Reductase 12 .4h is spent, the material after reduction is cooled down under coal dust covering protection, uses particle diameter to sieve separation for 3mm sieve and produces coal
Sub- manganese ore after powder and reduction；
4) the sub- manganese ore after reduction is added in the crucible of coreless induction furnace, any reducing agent and slag former is not added, 1650
Molten point is carried out at a temperature of~1680 DEG C, is 32min, molten iron and liquid Mn-rich slag multi_layer extraction between molten timesharing, from stove respectively
Release high phosphorus hot metal and " slag " afterwards and cool down, obtain the metal iron block rich in phosphorus and ultrapure Mn-rich slag.
The leading indicator of sub- manganese ore after gained reduces in the present embodiment is as shown in table 2.
The leading indicator of sub- manganese ore after gained reduces in the embodiment 1 of table 2
The yield and leading indicator of gained iron block and Mn-rich slag are as shown in table 3 in the present embodiment.
The yield and leading indicator of gained iron block and Mn-rich slag in the embodiment 1 of table 3
Embodiment 2：
1) manganese ore of state of Gabon is crushed, screens out the particle raw ore that particle diameter is 5~20mm, be dried for standby；
2) high-quality anthracite is crushed, the anchracite duff that particle diameter is below 3mm is screened out, into the particle raw ore of step 1)
With addition of anchracite duff, obtained material to be restored is simply mixed in the two, wherein the amount with addition of anchracite duff is the 28% of ore quality；
3) material to be restored is loaded in internal combustion type rotary kiln, drastic reduction 2.5h is carried out at a temperature of 1040 DEG C, will
Material after reduction cools down under coal dust covering protection, after using particle diameter to isolate coal dust and reduction for 3mm sieve
Sub- manganese ore；
4) the sub- manganese ore after reduction is added into the molten of 0.5t to divide in stove, any reducing agent and slag former is not added, 1680
Molten point is carried out at a temperature of~1750 DEG C, is 30min, molten iron and liquid Mn-rich slag multi_layer extraction between molten timesharing, from stove respectively
Release high phosphorus hot metal and " slag " afterwards and cool down, obtain the metal iron block rich in phosphorus and ultrapure Mn-rich slag.
The leading indicator of sub- manganese ore after gained reduces in the present embodiment is as shown in table 4.
The leading indicator of sub- manganese ore after gained reduces in the embodiment 2 of table 4
The yield and leading indicator of gained iron block and Mn-rich slag are as shown in table 5 in the present embodiment.
The yield and leading indicator of gained iron block and Mn-rich slag in the embodiment 2 of table 5
Embodiment 3：
1) manganese ore of state of Gabon is crushed, screens out the particle raw ore that particle diameter is 5~20mm, be dried for standby；
2) into the particle raw ore of step 1) with addition of the wood chip that particle diameter is below 3mm, the two is simply mixed obtained to be restored
The amount of material, wherein wood chip is the 20% of ore quality；
3) material to be restored is loaded in ￠ 315mm × 3m flame-insulating type rotary kiln, carried out at a temperature of 1000 DEG C deep
Reductase 12 .5h is spent, the material after reduction is cooled down under coal dust covering protection, the sub- manganese ore after coal dust and reduction is isolated in magnetic separation；
4) the sub- manganese ore after reduction is added into the molten of 0.5t to divide in stove, any reducing agent and slag former is not added, 1700
Molten point is carried out at a temperature of~1750 DEG C, is 30min, molten iron and liquid Mn-rich slag multi_layer extraction between molten timesharing, from stove respectively
Release high phosphorus hot metal and " slag " afterwards and cool down, obtain the metal iron block rich in phosphorus and ultrapure Mn-rich slag.
The leading indicator of sub- manganese ore after gained reduces in the present embodiment is as shown in table 6.
The leading indicator of sub- manganese ore after gained reduces in the embodiment 3 of table 6
The yield and leading indicator of gained iron block and Mn-rich slag are as shown in table 7 in the present embodiment.
The yield and leading indicator of gained iron block and Mn-rich slag in the embodiment 3 of table 7
It can be seen from the testing result of the sub- manganese ore of the gained of above-described embodiment 1- embodiments 3, metal iron block and Mn-rich slag originally
The technique that invention provides can effectively realize the separation of metallic iron, phosphorus and manganese ore in the manganese ore of high phosphorus high ferro, and can efficiently concentrating oxygen
Change sub- manganese, so as to realize that hardly possible selects making full use of for high phosphorus ferric manganese ore.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (5)
1. a kind of high phosphorus high ferro difficulty selects the method that the deferrization of manganese ore dephosphorization produces ultrapure Mn-rich slag, it is characterised in that including following step
Suddenly：
1) by the manganese ore crushing raw ore of high phosphorus high ferro, the particle raw ore that particle diameter is 5~20mm is screened out；
2) material to be restored is made with addition of reducing agent of the particle diameter less than 3mm into particle raw ore obtained by step 1), wherein with addition of also
The amount of former agent is the 20~30% of ore quality；
3) material to be restored is placed in kiln progress 2~2.5h of drastic reduction at a temperature of 1000~1050 DEG C, will reduced
Material afterwards coal dust cover or inert gas shielding under cool down, using screening or magnetic separation method by the material after reduction with it is residual
The coal dust separation stayed；
4) material after reduction is sent into melt and divides stove, reducing agent and sludging flux need not be added in furnace charge, in 1700~1850 DEG C
At a temperature of carry out molten point of acid slag making, the phosphorus for being reduced out is combined into the molten iron of liquid with iron, and molten iron is rich with liquid
The separation of manganese slag, layering, and release respectively outside stove, high ferrophosphorus and Mn-rich slag frit is obtained after cooling.
2. according to the method for claim 1, it is characterised in that the reducing agent described in step 2) is coal dust, charcoal, Jiao
Any one in powder, semi-coke or biological material.
3. according to the method for claim 2, it is characterised in that described biological material is in straw or wood chip
Any one.
4. method according to claim 1 or 2, it is characterised in that the kiln described in step 3) is flame-insulating type rotary kiln
With any one in internal combustion type rotary kiln.
5. according to the method for claim 4, it is characterised in that the kiln described in step 3) is flame-insulating type rotary kiln.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160541A (en) * | 2018-09-29 | 2019-01-08 | 广西锰华新能源科技发展有限公司 | A kind of preparation process of high-purity feed grade manganese monoxide |
| CN109971948A (en) * | 2019-05-15 | 2019-07-05 | 中南大学 | A kind of method of copper smelting slag and ferrous manganese ore coreduction recycling iron, copper and manganese |
| CN111100981A (en) * | 2019-12-27 | 2020-05-05 | 宁夏晟晏实业集团能源循环经济有限公司 | Method for improving metallurgical performance of manganese-rich slag smelted manganese sinter |
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| CN1040058A (en) * | 1988-08-06 | 1990-02-28 | 冶金工业部钢铁研究总院 | Rich iron but poor manganese ore utilizes novel process |
| CN102912160A (en) * | 2012-10-31 | 2013-02-06 | 北京神雾环境能源科技集团股份有限公司 | Method for treating lean ferrous manganese ore by directly reducing electric furnace melting components through rotary hearth furnace |
| CN103993117A (en) * | 2014-05-30 | 2014-08-20 | 苏州大学 | Method for preparing manganese-iron alloy based on low-grade manganese ore |
| CN107083479A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | The processing system and processing method of a kind of ferrous manganese ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1040058A (en) * | 1988-08-06 | 1990-02-28 | 冶金工业部钢铁研究总院 | Rich iron but poor manganese ore utilizes novel process |
| CN102912160A (en) * | 2012-10-31 | 2013-02-06 | 北京神雾环境能源科技集团股份有限公司 | Method for treating lean ferrous manganese ore by directly reducing electric furnace melting components through rotary hearth furnace |
| CN103993117A (en) * | 2014-05-30 | 2014-08-20 | 苏州大学 | Method for preparing manganese-iron alloy based on low-grade manganese ore |
| CN107083479A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | The processing system and processing method of a kind of ferrous manganese ore |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160541A (en) * | 2018-09-29 | 2019-01-08 | 广西锰华新能源科技发展有限公司 | A kind of preparation process of high-purity feed grade manganese monoxide |
| CN109971948A (en) * | 2019-05-15 | 2019-07-05 | 中南大学 | A kind of method of copper smelting slag and ferrous manganese ore coreduction recycling iron, copper and manganese |
| CN111100981A (en) * | 2019-12-27 | 2020-05-05 | 宁夏晟晏实业集团能源循环经济有限公司 | Method for improving metallurgical performance of manganese-rich slag smelted manganese sinter |
| CN111100981B (en) * | 2019-12-27 | 2021-11-02 | 宁夏晟晏实业集团能源循环经济有限公司 | Method for improving metallurgical performance of manganese-rich slag smelted manganese sinter |
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Application publication date: 20180323 |