CN102417970A - Method for reducing, magnetizing and concentrating iron tailings - Google Patents
Method for reducing, magnetizing and concentrating iron tailings Download PDFInfo
- Publication number
- CN102417970A CN102417970A CN2011103595458A CN201110359545A CN102417970A CN 102417970 A CN102417970 A CN 102417970A CN 2011103595458 A CN2011103595458 A CN 2011103595458A CN 201110359545 A CN201110359545 A CN 201110359545A CN 102417970 A CN102417970 A CN 102417970A
- Authority
- CN
- China
- Prior art keywords
- iron
- iron tailings
- reduction
- concentrating
- tailings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a chemical and physical combined chemical metallurgical ore dressing technology for concentrating reduced and magnetized Fe2O3-containing iron tailings into rich concentrate. In the method, the iron tailings are used as a raw material, turf peat is used as a reducing agent, fluorite is used as a dispersant, and limestone is used as an oxygen regulating agent. The method comprises the following steps of: proportioning and uniformly mixing reaction materials according to the detection content, performing reduction reaction by heating to obtain magnetic compounds Fe3O4 and FeO of iron, cooling and storing the reduced materials in a closed state of isolated air, and performing magnetic separation to obtain iron concentrate containing more than or equal to 65 percent of iron (Fe). By the method, fine silt-like nonmagnetic hematite with the chemical structure of Fe2O3 can be reduced into magnetic Fe3O4 and FeO, and iron is enriched into the iron concentrate by magnetic separation; and the method is easy to implement, reasonable in use of the reducing agent, good in dynamic reducing effect and low in production cost.
Description
Technical field
The present invention a kind ofly will contain Fe
2O
3Iron tailings reduction magnetization back selected be the chemistry of rich concentrate and the chemical industry metallurgical technique of preparing of physical bond.
Background technology
China's iron ore deposit amount is low, and per capita 25% of the not enough world average level of reserves, and wherein lean ore accounts for 94.3% of total reserves, rich ore only accounts for 5.7%.In the selected enrichment of lean ore, no matter be to the selected of magnetite or selected to limonite, rhombohedral iron ore, spathic iron ore, the remaining huge iron tailings of quantity that descended so far can't the enrichment utilization.Be not only waste, and be pollution environment to fe source.Though the reduction scheme of a lot of low-grade iron ores is arranged in the prior art, because the reductive agent cost that uses is higher, and the stirring action that dynamically seethes with excitement is poor, causes production cost higher, therefore can not obtain promoting.
Summary of the invention
The method that it is optional Armco magnetic iron compound that technical problem to be solved by this invention provides a kind of reduced iron mine tailing, it can be Fe with thin mud shape chemical structure
2O
3Non magnetic rhombohedral iron ore be reduced to the Fe of magnetic
3O
4And Fe
0Thereby, use magnetic separation that the iron enrichment is iron ore concentrate, this method operation is simple and easy, and reductive agent uses rationally, and dynamically reduction effect is good, and production cost is lower.
Solving the scheme that technical problem of the present invention adopts is: being raw material with the iron tailings, making reductive agent with the cob coal, is dispersion agent with the fluorite; The lime masonry is transferred the oxygen agent, prepares burden mixing by the detection level of each reaction mass; Reduction reaction is carried out in heating, obtains the magnetic compound Fe of iron
3O
4And Fe
0, in material cooling and the storing of air-tight state to reducing of secluding air, magnetic separation is the iron ore concentrate of iron content Fe>=65% again.
The iron content of described iron tailings is 10～40wt%; The mass ratio of each material of reduction reaction does; Iron tailings: cob coal: fluorite: Wingdale=1:0.05～0.1:0.001～0.005:0.005～0.01,300～600 ℃ of reduction reaction temperatures, the recovery time is 1～3h.
Iron tailings should pass through slow wash-out mud and be milled to granularity was 120 mesh sieves >=95wt%; It was 120 mesh sieves >=95 wt % that fluorite and lime are milled to granularity; It was 100 mesh sieves >=95 wt % that the cob coal is milled to granularity, and the reaction mass briquetting that should be mixed is Φ 30mm～Φ 50mm before the reduction reaction.
The material that reduction is good should except that after abandoning ash content, mud scum, adopt the upright ring of wet type high intensity magnetic separator to carry out magnetic separation through cyclone classification, and field intensity is 6000～12000H.
The invention has the beneficial effects as follows: 1. select cob coal cheap and easy to get to make reductive agent; Collect traditional gas base and coal-based reduction advantage is an one; Except that contained fixed carbon wherein rises the reductive action, its abundant gaseous reduction composition can play the better dynamic reduction effect, and the contained volatile matter of cob coal is from mixing each aspect minute effusion of touching with the ore deposit; Full contact not only, and play dynamic boiling stirring action.2. select fluorite and Wingdale as dispersion agent and the agent of accent oxygen, can make the particulate mineral aggregate be able to fully reduce.3. reduce material consumption rationally join control, make the red iron tailings reduction of particulate more thorough.4. select upright ring wet high-intensity magnetic field magnetic separator that the material that reduces is carried out magnetic separation, be convenient to more mud branch and ash content are got rid of smoothly, avoid the mine tailing of annulus (semi-ring) magnetic separator to stop up, improve the concentrate grade and the recovery effectively.
Present method with the magnetization of a large amount of depleted iron tailings selected be iron ore concentrate, not only improved environment, and reclaimed and abandoned long-pending fe source, to the iron import big country of our so poor iron, great economic benefit of tool and social benefit especially.
Embodiment
instance one: Yuxi, Yunnan Yang Wu iron tailings.
One, the raw material major ingredient is analyzed.
| Composition | Fe 2O 3 | Al 2O 3 | SiO 2 | CaO | MgO |
| Content (%) | 39.84 | 12.18 | 30.11 | 10.72 | 8.91 |
Two, main processes.
Mine tailing delays wash-out mud, levigate, and it is levigate to prepare burden, material compounding, briquetting, and reduction reaction is sealed cold storage, wet magnetic separation.
Three, main technique condition.
1. raw meal particle size: ore deposit and batching :-120 orders >=95%, coal :-100 orders >=95%.
2. material proportion: ore deposit: coal: fluorite: Wingdale=1:0.08:0.002:0.006.
3. reductive condition: a φ 50mm, 480 ℃ ± 10 ℃ of temperature, time 1h.
4. cooling storing: sealing cooling, sealing storing.
5. two-stage magnetic separation a: 8000H; Secondary 10000H.
Four, the products obtained therefrom quality and the ferrous metal recovery.
1. quality product: contain Fe 68.33%.
2. the ferrous metal recovery: 80.21%.
instance two: Huidong County, Sichuan iron tailings.
One, the raw material major ingredient is analyzed.
| Composition | Fe 2O 3 | Al 2O 3 | SiO 2 | CaO | MgO |
| Content (%) | 42.33 | 10.08 | 34.22 | 8.61 | 9.31 |
Two, main processes.
Mine tailing delays wash-out mud, levigate, and it is levigate to prepare burden, material compounding, briquetting, and reduction reaction is sealed cold storage, wet magnetic separation.
Three, main technique condition.
1. raw meal particle size: ore deposit and batching :-120 orders >=95%, coal :-100 orders >=95%.
2. material proportion: ore deposit: coal: fluorite: Wingdale=1:0.09:0.003:0.006.
3. reductive condition: a φ 50mm, 450 ℃ ± 10 ℃ of temperature, time 1.5h.
4. cooling storing: sealing cooling, sealing storing.
5. two-stage magnetic separation a: 8000H; Secondary 12000H.
Four, the products obtained therefrom quality and the ferrous metal recovery.
1. quality product: contain Fe 70.12%.
2. the ferrous metal recovery: 81.34%.
instance three: Malong, Yunnan iron tailings.
One, the raw material major ingredient is analyzed.
| Composition | Fe 2O 3 | MnO 2 | SiO 2 | CaO | Mg |
| Content (%) | 29.33 | 11.26 | 31.32 | 8.86 | 7.38 |
Two, main processes.
Mine tailing delays wash-out mud, levigate, levigate, the material compounding of preparing burden, briquetting, and reduction reaction is sealed cold storage, wet magnetic separation.
Three, main technique condition.
1. raw meal particle size: ore deposit and batching :-120 orders >=95%, coal :-100 orders >=95%.
2. material proportion: ore deposit: coal: fluorite: Wingdale=1:0.075:0.003:0.008.
3. reductive condition: a φ 50mm, 500 ℃ ± 10 ℃ of temperature, time 2h.
4. cooling storing: sealing cooling, sealing storing.
5. three grades of magnetic separation a: 6000H; Secondary 8000H; Three 12000H.
Four, the products obtained therefrom quality and the ferrous metal recovery.
1. quality product: contain Fe 66.12%.
2. the ferrous metal recovery: 78.23%.
Claims (4)
1. method for concentrating is magnetized in the reduction of an iron tailings, and it is characterized in that: iron tailings is a raw material, makes reductive agent with the cob coal; With the fluorite is dispersion agent, and the lime masonry is transferred the oxygen agent, prepares burden by the detection level of each reaction mass; Mixing, reduction reaction is carried out in heating, obtains the magnetic compound Fe of iron
3O
4And Fe
0, in material cooling and the storing of air-tight state to reducing of secluding air, magnetic separation is the iron ore concentrate of iron content Fe>=65% again.
2. magnetize method for concentrating by the reduction of the described iron tailings of claim 1; It is characterized in that: the iron content of iron tailings is 10～40wt%; The mass ratio of each material of reduction reaction does; Iron tailings: cob coal: fluorite: Wingdale=1:0.05～0.1:0.001～0.005:0.005～0.01,300～600 ℃ of reduction reaction temperatures, the recovery time is 1～3h.
3. magnetize method for concentrating by the reduction of the described iron tailings of claim 2; It is characterized in that: iron tailings should pass through slow wash-out mud and be milled to granularity was 120 mesh sieves >=95wt%; It was 120 mesh sieves >=95 wt % that fluorite and lime are milled to granularity; It was 100 mesh sieves >=95 wt % that the cob coal is milled to granularity, and the reaction mass briquetting that should be mixed is Φ 30mm～Φ 50mm before the reduction reaction.
4. by the reduction magnetization method for concentrating of the described iron tailings of claim 3, it is characterized in that: reduce good material through cyclone classification, except that after abandoning ash content, mud scum, adopt the upright ring of wet type high intensity magnetic separator to carry out magnetic separation, field intensity is 6000～12000H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110359545 CN102417970B (en) | 2011-11-15 | 2011-11-15 | Method for reducing, magnetizing and concentrating iron tailings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110359545 CN102417970B (en) | 2011-11-15 | 2011-11-15 | Method for reducing, magnetizing and concentrating iron tailings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102417970A true CN102417970A (en) | 2012-04-18 |
| CN102417970B CN102417970B (en) | 2013-05-22 |
Family
ID=45942613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110359545 Expired - Fee Related CN102417970B (en) | 2011-11-15 | 2011-11-15 | Method for reducing, magnetizing and concentrating iron tailings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102417970B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402335A (en) * | 2014-11-14 | 2015-03-11 | 中国建筑材料科学研究总院 | High-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as admixture |
| CN105597917A (en) * | 2016-01-19 | 2016-05-25 | 中国铝业股份有限公司 | Method for increasing magnetism of weakly-magnetic iron ore |
| CN107117844A (en) * | 2017-05-25 | 2017-09-01 | 中南冶金地质研究所 | A kind of method that utilization reduced iron tailings prepares cement concrete mineral admixture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861265A (en) * | 2005-04-22 | 2006-11-15 | 纪礽辉 | Ore-dressing process by using carbon-contg. block to reduce lean iron ore for prodn. of magnetite |
| CN101497933A (en) * | 2009-03-02 | 2009-08-05 | 王号德 | Method for rapidly and directly reducing haematite or limonite into ferrous powder |
-
2011
- 2011-11-15 CN CN 201110359545 patent/CN102417970B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861265A (en) * | 2005-04-22 | 2006-11-15 | 纪礽辉 | Ore-dressing process by using carbon-contg. block to reduce lean iron ore for prodn. of magnetite |
| CN101497933A (en) * | 2009-03-02 | 2009-08-05 | 王号德 | Method for rapidly and directly reducing haematite or limonite into ferrous powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402335A (en) * | 2014-11-14 | 2015-03-11 | 中国建筑材料科学研究总院 | High-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as admixture |
| CN105597917A (en) * | 2016-01-19 | 2016-05-25 | 中国铝业股份有限公司 | Method for increasing magnetism of weakly-magnetic iron ore |
| CN107117844A (en) * | 2017-05-25 | 2017-09-01 | 中南冶金地质研究所 | A kind of method that utilization reduced iron tailings prepares cement concrete mineral admixture |
| CN107117844B (en) * | 2017-05-25 | 2019-09-10 | 中南冶金地质研究所 | A method of cement concrete mineral admixture is prepared using reduced iron tailings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102417970B (en) | 2013-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103290205B (en) | A process of separating iron and titanium in seaside titanomagnetite via direct reduction roasting by using coal | |
| CN101862703B (en) | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite | |
| CN102162017B (en) | Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process | |
| CN1995411A (en) | Process for producing iron finished ore powder utilizing low grade siderite | |
| CN100500887C (en) | Concentration method for iron and boron in low-grade paigeite | |
| CN101403043A (en) | Method for producing ferronickel granule with direct reduction of laterite nickel mine with rotary kiln | |
| CN101418389B (en) | Method for directly reducing grain nickel iron in rotary kiln by using laterite nickle mine | |
| CN102424875B (en) | Method for preparing sponge iron from sulfate cinder | |
| CN103233114A (en) | Method for producing nickel/ferrum from nickel laterite ores | |
| CN105219907A (en) | The iron-smelting process of high-phosphor oolitic hematite gas base directly reducing-mill ore magnetic selection | |
| CN102796879A (en) | Method for preparing chromium-containing iron powder by direct reduction of calcium-free chromium slag | |
| CN109304256A (en) | A kind of method of comprehensive utilization of copper metallurgy tailings | |
| CN102936653A (en) | Method for reducing high-density metallized pellet | |
| CN102653804A (en) | Method for producing granular iron by magnetically roasting and reducing low-quality limonite with rotary hearth furnace | |
| CN101293220B (en) | Additive agent for iron-aluminum separation for high-alumina iron ore | |
| CN102417970B (en) | Method for reducing, magnetizing and concentrating iron tailings | |
| CN103789477B (en) | Method for producing direct reduced iron by high phosphorus oolitic hematite and blast furnace ash | |
| CN105734192B (en) | A kind of mineral processing production method of low grade hematite | |
| CN102796839A (en) | Technique for producing direct reduced iron and synchronously performing desulfurization through reduction roasting of sulfate slag | |
| CN114350939A (en) | Pellet for producing alkaline fine iron ore by magnetizing roasting and preparation method thereof | |
| CN102168159B (en) | Reducing agent for carrying out direct reduction roasting on limonite and hematite to produce reduced iron | |
| CN103305650B (en) | Efficient comprehensive utilization method of siderite resource | |
| CN104846201B (en) | Method for enriching rare earth and preparing iron with coal slime rich in rare earth in ash | |
| Feng et al. | Sintering characteristics of fluxes and their structure optimization | |
| CN205062100U (en) | Iron -smelting system of high phosphorus oolitic hematite gas base direct reduction - ore grinding magnetic separation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20141115 |
|
| EXPY | Termination of patent right or utility model |