CN103276294A - Method for rapidly reducing nickel slag to produce iron-nickel-copper alloy powder in kiln under reducing atmosphere - Google Patents
Method for rapidly reducing nickel slag to produce iron-nickel-copper alloy powder in kiln under reducing atmosphere Download PDFInfo
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Abstract
The invention relates to a method for rapidly reducing nickel waste slag to produce iron-nickel-copper alloy powder in a kiln under the reducing atmosphere. The method is characterized by comprising the following steps of: proportionally mixing the nickel waste slag, reducing agents and additives, crushing or levigating the mixture to 200 meshes to obtain 20-40% of residues on sieve; doping agglomerants and water occupying 5-20% of all materials on a dry mass basis, and uniformly mixing; preparing small balls with the diameter of 15-33 mm or small cylinders with the diameter and the height of 15-30 mm by using a ball press machine or a section making machine; drying; flatly paving the materials at the bottom of the kiln, wherein the thickness of the material layer is 20-45 mm, the reducing temperature of the material layer is 1,250-1,450 DEG C, and the reducing time is 10-40 minutes; and performing cooling, crushing, wet grinding and wet magnetic separation on the reduced balls or sections to obtain iron-nickel-copper alloy micropowder with the iron recovery rate of 85-99 %, wherein in the obtained product, the iron content is 88-98 %, the nickel content is 0.13-1.98 %, the copper content is 0.14-1.29 % and the particle size is 3-100 microns, and the product can serve as a raw material for smelting weather-resistant steel. The tailings after wet grinding and wet magnetic separation can serve as raw materials for extracting aedelforsite or producing hollow sintered bricks.
Description
Technical background
The present invention relates to the comprehensive utilization of resources field, a kind of method that fast restore nickel waste is produced iron corronel powder in the reducing atmosphere kiln is provided.
China produces about 2,000,000 tons of nickel waste at present per year, and have 4600 tons of metallic nickels, 3200 tons of metallic coppers to be wasted every year approximately in the national nickel waste.Have the higher value except residual metal nickel, copper etc. in the nickel waste, also often contain 30%～50% iron, iron in the nickel waste mainly exists with the form of ferric metasilicate, therefore adopts traditional beneficiation method iron wherein can not be enriched to the grade of the fine iron breeze of marketable value.The nickel waste of China is generally sold the batching of cement mill as calcining cement clinker at present, allocates per-cent into generally 3%～5%, and the west area can't consume the nickel waste of a large amount of outputs because cement production enterprise is less.Therefore the nickel waste is in the state of storing up substantially.Whole nation nickel waste is stored up and is reached 4,000 ten thousand tons, if it is amounted to into metal, has then accumulated to throw aside and has stored up about 1,600 ten thousand tons ferrous metal, 6.4 ten thousand tons copper metal and 9.2 ten thousand tons nickel metal.The actual boundary grade of the present iron ore exploitation of China is 10%～30%, and the iron level in the nickel waste is higher than the actual boundary grade of China's iron ore exploitation far away.But exist because the iron in the nickel waste mainly is form with ferric metasilicate, and cause traditional ore-dressing technique iron wherein can't be carried out effective enrichment.Therefore no matter be to be sold to the cement mill to abandon disposal as batching or the heap of calcining cement clinker, all cause the huge waste of nickel resources in this slag, copper resource and iron resources.
Purpose of the present invention is exactly that wherein remaining nickel, copper and a large amount of iron resources form with iron corronel micro mist is extracted, and makes the product that extracts have higher value, creates economic benefit, environmental benefit and social benefit simultaneously.
The prior art that is closely related most with the present invention is the reduction roasting magnetic separation of various refractory iron ores.
Publication number is that the patent of CN101161830A has been described a kind of deacidizing sintering process for powdered ore pulletizing; comprise pellet forming process and sinter process; adopt unique prescription and technology; under the prerequisite of producing qualified roasting ore deposit ball product; make breeze can be used for smelting iron and steel; take full advantage of and save natural resources, effectively protect environment and save enterprise's production cost.This invention has just related to pellet forming process and sinter process, and the ore deposit ball ferrous grade average out to 45%～63% after the roasting, such product can not directly be used for making steel.This technology does not provide after the roasting data of reduction ratio, abrasive grit size and the washability of iron in the ball of ore deposit.
Publication number is that the patent of CN101063181A has been described a kind of method of burning pelletizing enrichment gold and coproduction of iron powder with rotary hearth furnace rapid reduction of carbonaceous auriferous pyrite, it is strong to have adaptability to raw material, easy to operate, the temperature field is even, and the production time is shorter, and the reaction times is fast, the production efficiency height, gold and iron recovery height, cost is low, characteristics such as easily automatic control.But the iron in the related material of this technology mainly is ferric oxide, does not provide the method for control ferric metasilicate reduction.This technology does not provide the effective ways how strong reduction rotary hearth furnace tail gas is handled yet, and advocates in existing country under the situation of energy-saving and emission-reduction to be difficult to industrializing implementation.In addition, three given embodiment are the processing about magnesia red soil nickel ore in this technology, and describe inconsistently in the invention book, can't implement.
Publication number is that the patent of CN101413057A has been described a kind of low-grade and complicated iron ore method for efficiently separating, complicated iron ore classification to different grades and kind is handled, obtain lump ore and breeze and make drying and preheating behind the ball, reducing roasting, cooling, ball milling, magnetic separation, ball milling, magnetic separation or reverse flotation obtain iron ore concentrate or reduced iron powder.This patent is to adopt chain mat machine-shaft furnace process, carries out weak reduction at 900 ℃～1000 ℃, and the raw material that adopts is low-grade iron ore of main ferrous mineral with the ferric oxide only also, does not relate to the technology of control ferric metasilicate reduction.In addition, this technology does not relate to the technical problem of week reduction tail gas recycling yet.
Summary of the invention
The present invention seeks to mainly to solve the core technology difficult problem of two aspects: the one, in kiln, create 1250 ℃～1450 ℃ high temperature strongly reducing atmosphere, utilize high temperature to reduce physics heat energy and the chemical heat energy of tail gas by force simultaneously; The 2nd, control material reaction process, at lime, under the effect of additives such as yellow soda ash with the Fe in the ferric metasilicate
2+Cement out, be reduced into metallic iron more than 99%, control metallic nickel, copper enter metallic iron, form iron corronel micro mist, control iron corronel micro mist size simultaneously at 3～100um, so that follow-up wet-milling, wet method low intensity magnetic separation can be selected iron grade and the rate of recovery all at the iron corronel micro mist more than 90%.
A kind of method that fast deep reduced nickel waste is produced iron corronel micro mist in the reducing atmosphere kiln proposed by the invention is by Kiln Control, prepare burden, make ball or four parts such as the section of making, drastic reduction roasting and broken wet-milling-wet magnetic separation are formed.
In order to control the strongly reducing atmosphere of kiln inside, when the supply of air or oxygen or oxygen-rich air is institute's fuel supplying perfect combustion during the kiln burning 40%～60% of required whole air or oxygens or oxygen-rich air.The needed air or oxygen of above-mentioned perfect combustion or oxygen-rich air amount refer to the various carbon compounds 100% in the fuel are transformed into CO
2Needed Theoretical Calculation amount.
Both to have kept than strongly reducing atmosphere in order making in the kiln, and to have made again to reach 1250 ℃～1450 ℃ required high temperature of fast deep reduction in the kiln, fuel gas and air or oxygen or oxygen-rich air all need to carry out high temperature preheating to be handled.Fuel used gas is natural gas or coal-seam gas or petroleum gas or shale gas or coal gas.The pre-thermal recovery tubular heat exchanger of fuel gas and the high-temp waste gas that the drastic reduction kiln is discharged advance heat exchange, and the temperature of the fuel gas after the preheating is 300 ℃～500 ℃.The strong reducing property waste gas that pre-thermal recovery heat accumulating type high-temp combustion technology or the hotblast stove of air or oxygen or oxygen-rich air, hotblast stove add the discharge of thermal recovery drastic reduction kiln acts as a fuel.Air or oxygen or oxygen-rich air are after heat accumulating type high-temp combustion technology or hotblast stove preheating, and temperature reaches 900 ℃～1300 ℃.Like this by two preheating technologies of above-mentioned fuel gas and air or oxygen or oxygen-rich air, realized high temperature and reducing environment by force in the drastic reduction stove, and will reduce physics heat energy and the chemical heat energy of waste gas by force and all recycle, eliminated CO in the discharging waste gas, CH
4Deng the unwanted component that atmosphere is had strong pollution.
Batching among the present invention adopts the ratio of nickel waste, reductive agent, additive and binding agent to be nickel waste: reductive agent: additive: binding agent=100:12～28:5～10:1～5.
The main chemical compositions mass percent of described nickel waste is: TFe:35%～45%, SiO
2: 30%～40%, Al
2O
3: 2%～7%, MgO:1%～10%, CaO:1%～5%, Ni:0.1%～0.8%, Cu:0.1%～1.2%, other: 0.1%～3%.(annotate: full iron TFe refers to all iron of existing in any form, comprise free iron and and the iron of oxygen or other element combinations, all iron content 35%～45% is converted into ferriferous oxide content and is expressed as 45%～64%, can reach 100% with other composition quality per-cent sums.) described reductive agent is a kind of in coke powder, brown coal, bituminous coal, the hard coal or combination that certain is several.Described additive is a kind of in Wingdale, lime, yellow soda ash, fluorite, the industrial soda or combination that certain is several.Described binding agent is a kind of in clay, water glass, red mud, mud, the organic binder bond or combination that certain is several.
Above-mentioned nickel waste, reductive agent and additive are mixed in proportion broken or levigate to 200 mesh screen residues 20%～40%, mix binding agent and the water that accounts for whole material butt quality 5～20%, make bead or the diameter of diameter 15mm～30mm with ball press or system section machine behind the mixing and highly be the small column of 15mm～30mm, be tiled at the bottom of the kiln after the oven dry, bed thickness is 20mm～45mm, the reduction temperature of the bed of material is 1250 ℃～1450 ℃, and the recovery time is 10～40min.In pellet after the reduction or the material section, the form that exists of various iron has 99.1%～99.8% to be reduced into metallic iron in the initial material, and the form that exists of various nickel has 85.2%～99.5% to be reduced into metallic nickel in the initial material, and enters the metallic iron particulate.The form that exists of various copper has 88.3%～99.5% to be reduced into metallic copper in the initial material, and enters the metallic iron particulate.It is 85%～99% iron corronel micro mist that pellet behind the drastic reduction or material section obtain iron recovery through cooling, fragmentation, wet-milling, wet magnetic separation, iron level is 88%～98% in the products obtained therefrom, nickel content is 0.13%～1.98%, copper content is 0.14%～1.29%, granularity is 3～100um, can be used as the raw material of smelting weathering steel.The tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or produce clinker brick with central.
Beneficial effect of the present invention
1. the iron in a large amount of ferric metasilicates and remaining nickel, copper extract, and are transformed into the iron corronel micro mist with high added value in the nickel waste that traditional technique of preparing and existing reduction roasting magnetic separation technology can't be selected;
2. compare with existing other reduction kiln reducing roasting technologies, when having realized the strong reducing environment of high temperature, realized that also high temperature reduces the physics heat energy of waste gas and the recycling of chemical heat energy by force, avoided discharging CO and CH in the atmosphere
4Etc. strong pollution gas, improved utilization efficiency of energy;
3. compare with existing oxidizing atmosphere kiln kiln furnitures sealing drastic reduction technology, the recovery time has shortened more than 10 times, is conducive to raise the efficiency, and reduces cost;
4. realized three kinds of main valuable metals in the nickel waste---extraction and application in the time of iron, nickel and copper, significant to the comprehensive utilization of nickel waste;
5. owing to the overwhelming majority of metallic elements such as iron, nickel, copper is removed in the tailings of wet-milling wet magnetic separation, being conducive to the hollow sintering of the friendly type of tailings production environment changes.
Description of drawings
Fig. 1 is that reducing atmosphere kiln of the present invention is handled the process flow sheet that the nickel waste is produced iron corronel micro mist.
Embodiment
With reference to Fig. 1, implement the present invention according to process flow sheet of the present invention, comprising:
1. raw material preparatory stage:
Used nickel waste, reductive agent (a kind of in coke powder, brown coal, bituminous coal, the hard coal or the combination that certain is several), additive (a kind of in Wingdale, lime, yellow soda ash, fluorite, the industrial soda or the combination that certain is several) is broken, levigate, to 200 mesh screen residues 20%～40%;
2. burden process:
As can be seen from Figure 1, the batching of this test comprises four parts: nickel waste, reductive agent, additive and binding agent.In the present invention, the proportioning of nickel waste, reductive agent, additive and binding agent is nickel waste: reductive agent: additive: binding agent=100:12～28:5～10:1～5.
3. compounding process:
Confected materials in the 2nd step is mixed fully, guarantee that the material that mixes is uniform;
4. pressure ball or compression leg operation
The material that mixes is added the water that accounts for whole material butt quality 5%～20%, stir simultaneously, be pressed into the pelletizing of 15～30mm or make the bottom surface diameter and highly be the small column of 15～30mm with system section machine with ball press, and drying treatment.
5. feed and the reduction operation:
With inserting the reducing atmosphere kiln after the pellet of compacting or the material section drying, under certain reduction temperature, carry out the drastic reduction roasting, the bed of material evenly is layered on furnace bottom, during experience preheating, heating and drastic reduction.Mixture mainly carries out drastic reduction at drastic reduction temperature band, and reduction temperature is 1250 ℃～1450 ℃, and the recovery time is 10～40min, treats that temperature drops to below 80 ℃, takes out material from this reducing atmosphere kiln.In pellet after the reduction or the material section, the form that exists of various iron has 99%～99.8% to be reduced into metallic iron in the initial material.The form that exists of various nickel has 90%～99.8% to be reduced into metallic nickel in the initial material, and enters the metallic iron particulate.The form that exists of various copper has 90%～99.8% to be reduced into metallic copper in the initial material, and enters the metallic iron particulate.
6. broken, wet-milling and wet magnetic separation operation
As shown in Figure 1, it is 85%～99% iron corronel micro mist that pellet after the reduction or material section obtain iron recovery through cooling, fragmentation, wet-milling, wet magnetic separation, iron level is 88%～98% in the products obtained therefrom, nickel content is 0.13%～1.98%, copper content is 0.14%～1.29%, granularity is 3～100um, can be used as the raw material of smelting weathering steel, and the tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or produce clinker brick with central.
Embodiment 1
The present embodiment technical process by Kiln Control, prepare burden, four parts such as the section of making, drastic reduction roasting and broken wet-milling-wet magnetic separation form.
In order to control the strongly reducing atmosphere of kiln inside, when amount of supplied air is institute's fuel supplying perfect combustion during the kiln burning 50% of required whole air.The needed air of above-mentioned perfect combustion refers to the various carbon compounds 100% in the fuel are transformed into CO
2Needed Theoretical Calculation amount.
Both to have kept than strongly reducing atmosphere in order making in the kiln, and to have made again to reach 1350 ℃ required high temperature of fast deep reduction in the kiln, fuel gas and air all need to carry out high temperature preheating to be handled.Fuel used gas is Sweet natural gas.The pre-thermal recovery tubular heat exchanger of Sweet natural gas and the high-temp waste gas that the drastic reduction kiln is discharged advance heat exchange, the temperature of the Sweet natural gas after the preheating is 500 ℃, preheating of air adopts heat accumulating type high-temp combustion technology, and air is after the preheating of heat accumulating type high-temp combustion technology, and temperature reaches 1200 ℃.Like this by two preheating technologies of above-mentioned fuel gas and air, realized high temperature and reducing environment by force in the drastic reduction stove, and will reduce physics heat energy and the chemical heat energy of waste gas by force and all recycle, eliminated CO in the discharging waste gas, CH
4Deng the unwanted component that atmosphere is had strong pollution.
The batching of present embodiment adopts the ratio of nickel waste, reductive agent, additive and binding agent to be nickel waste: reductive agent: additive: binding agent=100:20:5.4:5.The main chemical compositions of used nickel waste is: TFe41.31%, SiO
235.62%, Al
2O
32.43%, MgO8.74%, CaO3.29%, Ni0.22%, Cu0.19%, other is 2.9% years old.Used reductive agent is brown coal, and additive therefor is lime, and used binding agent is Xylo-Mucine (CMC).
With above-mentioned nickel waste, brown coal and lime are mixed in proportion levigate to 200 mesh screen residues 20%, mix binding agent and the water that accounts for whole material butt quality 10%, make diameter with system section machine behind the mixing and highly be the small column of 20mm, be tiled at the bottom of the kiln after the oven dry, bed thickness is 30mm, the reduction temperature of the bed of material is 1450 ℃, recovery time is 10min, material section after the reduction is through cooling, broken, wet-milling, it is 94.65% iron corronel micro mist that wet magnetic separation obtains iron recovery, and iron level is 91.38% in the products obtained therefrom, nickel content is 0.42%, copper content is 0.26%, and granularity is 5～70um, can be used as the raw material of smelting weathering steel.Primary grinding is adopted in wet-milling, and ore milling concentration is 65%, ore grinding time 20min; The wet magnetic separation magneticstrength is 60.8KA/m.The tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or produce clinker brick with central.
Embodiment 2
The main chemical compositions of used nickel waste is: TFe40.21%, SiO
234.61%, Al
2O
32.26%, MgO8.86%, CaO3.37%, Ni0.23%, Cu0.16%, other is 2.6% years old.Used reductive agent is brown coal, and additive therefor is lime, and used binding agent is Xylo-Mucine (CMC).With above-mentioned nickel waste, brown coal and lime are mixed in proportion levigate to 200 mesh screen residues 20%, mix binding agent and the water that accounts for whole material butt quality 9%, make diameter with system section machine behind the mixing and highly be the small column of 20mm, be tiled at the bottom of the kiln after the oven dry, bed thickness is 30mm, the reduction temperature of the bed of material is 1350 ℃, recovery time is 40min, material section after the reduction is through cooling, broken, wet-milling, wet send out magnetic separation to obtain iron recovery be 97.51% iron corronel micro mist, iron level is 91.97% in the products obtained therefrom, and nickel content is 0.47%, and copper content is 0.28%, granularity is 5～70um, can be used as the raw material of smelting weathering steel.Primary grinding is adopted in wet-milling, and ore milling concentration is 65%, ore grinding time 20min; The wet magnetic separation magneticstrength is 60.8KA/m.The tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or clinker brick with central.
Embodiment 3
The batching of present embodiment adopts the ratio of nickel waste, reductive agent, additive and binding agent to be nickel waste: reductive agent: additive: binding agent=100:14:5.4:5.The main chemical compositions of used nickel waste is: TFe42.31%, SiO
235.60%, Al
2O
32.37%, MgO5.77%, CaO3.26%, Ni0.22%, Cu0.16%, other is 2.55% years old.Used reductive agent is coke powder, and additive therefor is lime, and used binding agent is Xylo-Mucine (CMC).
With above-mentioned nickel waste, coke powder and lime are mixed in proportion levigate to 200 mesh screen residues 20%, mix binding agent and the water that accounts for whole material butt quality 10%, make diameter with system section machine behind the mixing and highly be the small column of 20mm, be tiled at the bottom of the kiln after the oven dry, bed thickness is 30mm, the reduction temperature of the bed of material is 1350 ℃, recovery time is 20min, material section after the reduction is through cooling, broken, wet-milling, it is 90.61% iron corronel micro mist that wet magnetic separation obtains iron recovery, iron level is 91.74% in the products obtained therefrom, and nickel content is 0.45%, and copper content is 0.35%, granularity is 6～85um, can be used as the raw material of smelting weathering steel.Primary grinding is adopted in wet-milling, and ore milling concentration is 65%, ore grinding time 20min; The wet magnetic separation magneticstrength is 60.8KA/m.The tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or produce clinker brick with central.
Embodiment 4
The batching of present embodiment adopts the ratio of nickel waste, reductive agent, additive and binding agent to be nickel waste: reductive agent: additive: binding agent=100:20:6:5.The main chemical compositions of used nickel waste is: TFe40.52%, SiO
231.64%, Al
2O
33.76%, MgO3.62%, CaO2.73%, Ni0.21%, Cu0.18%, other is 2.06% years old.Used reductive agent is coke powder, and additive therefor is lime, and used binding agent is Xylo-Mucine (CMC).
With above-mentioned nickel waste, coke powder and lime are mixed in proportion levigate to 200 mesh screen residues 20%, mix binding agent and the water that accounts for whole material butt quality 8%, make diameter with system section machine behind the mixing and highly be the small column of 20mm, be tiled at the bottom of the kiln after the oven dry, bed thickness is 30mm, the reduction temperature of the bed of material is 1350 ℃, recovery time is 30min, material section after the reduction is through cooling, broken, wet-milling, it is 92.01% iron corronel micro mist that wet magnetic separation obtains iron recovery, iron level is 92.11% in the products obtained therefrom, and nickel content is 0.41%, and copper content is 0.31%, granularity is 7～90um, can be used as the raw material of smelting weathering steel.Primary grinding is adopted in wet-milling, and ore milling concentration is 65%, ore grinding time 20min; The wet magnetic separation magneticstrength is 60.8KA/m.The tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or produce clinker brick with central.
Claims (4)
1. the method that fast deep reduced nickel waste is produced iron corronel micro mist in the reducing atmosphere kiln, it is characterized in that: with the nickel waste, reductive agent and additive are mixed in proportion broken or levigate to 200 mesh screen residues 20%～40%, mix binding agent and the water that accounts for whole material butt quality 5%～20%, be mixed the back with ball press or make the small column that the section machine is made bead or the diameter of diameter 15mm～30mm and highly is 15mm～30mm, be tiled at the bottom of the kiln after the oven dry, bed thickness is 20mm～45mm, the reduction temperature of the bed of material is 1250 ℃～1450 ℃, recovery time is 10～40min, pellet behind the drastic reduction or material section are through cooling, broken, wet-milling, it is 85%～99% iron corronel micro mist that wet magnetic separation obtains iron recovery, iron level is 88%～98% in the products obtained therefrom, nickel content is 0.13%～1.98%, copper content is 0.14%～1.29%, granularity is 3～100um, can be used as the raw material of smelting weathering steel; The tailings of wet-milling wet magnetic separation can be used as the raw material that extracts wollastonite or produce clinker brick with central.
2. the method that fast deep reduced nickel waste is produced iron corronel micro mist in a kind of reducing atmosphere kiln according to claim 1 is characterized in that the main chemical compositions of described nickel waste is: TFe:35%～45%, SiO
2: 30%～40%, Al
2O
3: 2%～7%, MgO:1%～10%, CaO:1%～5%, Ni:0.1%～0.8%, Cu:0.1%～1.2%, other: 0.1%～3%; Described reductive agent is a kind of in coke powder, brown coal, bituminous coal, the hard coal or combination that certain is several; Described additive is a kind of in Wingdale, lime, yellow soda ash, fluorite, the industrial soda or combination that certain is several; Described binding agent is a kind of in clay, water glass, red mud, mud, the organic binder bond or combination that certain is several.
3. the method that fast deep reduced nickel waste is produced iron corronel micro mist in a kind of reducing atmosphere kiln according to claim 1, it is characterized in that, the ratio of nickel waste, reductive agent, additive and binding agent is nickel waste: reductive agent: additive: binding agent=100:12～28:5～10:1～5; The reduction temperature that adopts is 1250 ℃～1450 ℃; The recovery time of adopting is 10min～40min.
4. the method that fast deep reduced nickel waste is produced iron corronel micro mist in a kind of reducing atmosphere kiln according to claim 1 is characterized in that fuel used gas is Sweet natural gas or coal-seam gas or petroleum gas or shale gas or coal gas; The pre-thermal recovery tubular heat exchanger of fuel gas and the high-temp waste gas that the drastic reduction kiln is discharged advance heat exchange, the temperature of the fuel gas after the preheating is 300 ℃～500 ℃, pre-thermal recovery heat accumulating type high-temp combustion technology or the hotblast stove of air or oxygen or oxygen-rich air, the strong reducing property waste gas that hotblast stove adds the discharge of thermal recovery drastic reduction kiln acts as a fuel, air or oxygen or oxygen-rich air are after heat accumulating type high-temp combustion technology or hotblast stove preheating, and temperature reaches 900 ℃～1300 ℃.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589819A (en) * | 2013-10-12 | 2014-02-19 | 酒泉钢铁(集团)有限责任公司 | Method for directly reducing nonferrous smelting slag through oxygenation |
| CN104946840A (en) * | 2015-06-19 | 2015-09-30 | 西安建筑科技大学 | Method for preparing direct reduction iron and gelation materials through iron-contained nonferrous metallurgical slag |
| CN104946839A (en) * | 2015-06-19 | 2015-09-30 | 西安建筑科技大学 | Method for preparing direct reduction iron and gelation materials through low-grade iron ore |
| CN105838840A (en) * | 2016-05-24 | 2016-08-10 | 江苏省冶金设计院有限公司 | Method for preparing granular iron and system for preparing granular iron |
| CN107130077A (en) * | 2017-05-18 | 2017-09-05 | 江苏省冶金设计院有限公司 | The system and method for handling nickel slag |
| CN107227401A (en) * | 2017-06-20 | 2017-10-03 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
| CN111057854A (en) * | 2019-12-13 | 2020-04-24 | 潘爱芳 | Treatment method of metal tailings |
| CN111663037A (en) * | 2020-07-08 | 2020-09-15 | 鞍钢股份有限公司 | Method for producing sponge iron by using iron oxide in converter slag |
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| CN101063181A (en) * | 2007-06-05 | 2007-10-31 | 昆明贵金属研究所 | Rapid reduction of carbonaceous gold-containing iron ore firing residue pellet gold enrichment by using rotary hearth furnace and method for coproduction of iron powder |
| CN101413057A (en) * | 2008-03-05 | 2009-04-22 | 中南大学 | Method for efficiently separating low-ore grade and complicated iron ore |
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| CN103589819A (en) * | 2013-10-12 | 2014-02-19 | 酒泉钢铁(集团)有限责任公司 | Method for directly reducing nonferrous smelting slag through oxygenation |
| CN104946840A (en) * | 2015-06-19 | 2015-09-30 | 西安建筑科技大学 | Method for preparing direct reduction iron and gelation materials through iron-contained nonferrous metallurgical slag |
| CN104946839A (en) * | 2015-06-19 | 2015-09-30 | 西安建筑科技大学 | Method for preparing direct reduction iron and gelation materials through low-grade iron ore |
| CN105838840A (en) * | 2016-05-24 | 2016-08-10 | 江苏省冶金设计院有限公司 | Method for preparing granular iron and system for preparing granular iron |
| CN105838840B (en) * | 2016-05-24 | 2018-07-17 | 江苏省冶金设计院有限公司 | It prepares the method for granulated iron and prepares the system of granulated iron |
| CN107130077A (en) * | 2017-05-18 | 2017-09-05 | 江苏省冶金设计院有限公司 | The system and method for handling nickel slag |
| CN107227401A (en) * | 2017-06-20 | 2017-10-03 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
| CN107227401B (en) * | 2017-06-20 | 2019-01-29 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
| CN111057854A (en) * | 2019-12-13 | 2020-04-24 | 潘爱芳 | Treatment method of metal tailings |
| CN111663037A (en) * | 2020-07-08 | 2020-09-15 | 鞍钢股份有限公司 | Method for producing sponge iron by using iron oxide in converter slag |
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| CN103276294B (en) | 2015-06-17 |
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