CN102489373A - Mineral processing technology for processing iron ore - Google Patents
Mineral processing technology for processing iron ore Download PDFInfo
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- CN102489373A CN102489373A CN2011104017883A CN201110401788A CN102489373A CN 102489373 A CN102489373 A CN 102489373A CN 2011104017883 A CN2011104017883 A CN 2011104017883A CN 201110401788 A CN201110401788 A CN 201110401788A CN 102489373 A CN102489373 A CN 102489373A
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- ore
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 36
- 239000011707 mineral Substances 0.000 title claims abstract description 36
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 19
- 238000005516 engineering process Methods 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000006247 magnetic powder Substances 0.000 claims description 18
- 238000000227 grinding Methods 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 238000000498 ball milling Methods 0.000 abstract description 4
- 238000003801 milling Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 3
- 239000011449 brick Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 238000007885 magnetic separation Methods 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 4
- 238000010494 dissociation reaction Methods 0.000 description 3
- 230000005593 dissociations Effects 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a mineral processing technology for processing an iron ore, comprising the procedures of crushing, carrying out powerless air separation, rolling, carrying out powered air separation, selecting powder, magnetically separating, and the like. According to the invention, after the powerless air separation, fine ore powder is separated so as to effectively save energy; compared with traditional rod milling and ball milling, power consumption of a roll squeezer in unit raw ore is reduced by 40-50%; the loss of steel (a wear-resistant material) in the unit raw ore is decreased to 10-20g/t from previous 400-1,200g/t. Meanwhile, the mineral processing technology provided by the invention has the advantages of small area occupied by equipment, high yield of processing the raw ore, environmental friendliness, no atmospheric pollution and the like; and lode fine powder has other usages and can be used for preparing bricks, fillers and the like.
Description
Technical field
The invention belongs to the metallic ore processing technique field, specifically, particularly a kind of ore-dressing technique of iron ore processing.
Background technology
Mineral Resources in China has two characteristics: the one, and lean ore is many, rich ore is few, and the 2nd, multielement symbiosis complex ore is more.At present, the coefficient of mining of lean ore is lower, and the part small mine is not also fundamentally broken away from extensive management style, also has big gap with advanced international standard, and a lot of enterprises rely on " adopting richness administers poor " to keep profit.Along with constant development of economy, the increasing demand of mineral resources increases, and the utilization of China's ore will constantly develop to lean ore.
Smelting enterprise is in order to reduce production costs, and fine ore is adopted in energy savings consumption more, that is: tcrude ore is carried out fragmentation, grinds, and rejects gangue mineral through magnetic separation, flotation, gravity treatment program, selects fine ore gradually and is used for smelting.And in ore dressing, the fragmentation of iron ore and grind investment of devices, producing cost, power consumption, the high-abrasive material (liner plate, rod section, ball etc.) that operation uses and consume, often shared proportion maximum is determining the ore dressing economic benefit of enterprises to a great extent.
Therefore, the resource synthetic development of China utilizes level and Technology Need to be further enhanced.The iron ore that with the grade is 15%-20% is an example, reaches 65% the smart powder of iron if utilize traditional handicraft to be processed into grade, and unit cost is higher, does not have economic benefit.
The ore-dressing technique of conventional iron ore has following two kinds:
1, raw ore → crushing process (jaw crusher is slightly broken → gyratory crusher in broken → gyratory crusher carefully broken) → grinding process (fine grinding of ball mill corase grind → ball mill) → ore dressing → concentrate.
2, raw ore → crushing process (jaw crusher slightly broken → autogenous tumbling mill is carefully broken) → grinding process (fine grinding of ball mill corase grind → ball mill) → ore dressing → concentrate.
With 2008 be example, China's raw iron ores output reaches 78481.6 ten thousand tons, the finished product ore deposit reaches 37671.2 ten thousand tons.Need 1.6 tons of finished product ore deposits to calculate with one ton of pig iron, China smelting enterprise needed 75,385 ten thousand tons of finished product ore deposits in 2008.Domestic finished product mineral products can far can not satisfy the smelting needs, are example with the steel consumption during the finished product ore deposit produces, and one ton of raw ore of every processing in 2008 need consume 1.6～1.8kg steel, year consume steel 125.6～135.6 ten thousand ton.
In traditional iron ore dressing technology; Technological equipment generally is that, jaw broken with hammer is broken as one broken, two broken in the ore processing, the raw ore granularity 25～30mm, rough entering rod milling, ball milling or garden taper thread grinding grind; Breeze after grinding carries out sorting with magnetic separation, flotation; Select the fine ore of needed granularity, rough powder returns mill and grinds again, and gangue mineral is abandoned as mine tailing.As previously mentioned, this technological equipment power consumption, steel consumption height, rod milling, ball milling unit's raw ore steel consumption reach 400～1200g, and power consumption reaches 60～70kw/h.
Summary of the invention
The iron ore processing ore-dressing technique that technical problem to be solved by this invention is a kind of effectively energy savings to be provided and to reduce steel consumption.
Technical scheme of the present invention is following: a kind of iron ore processing ore-dressing technique may further comprise the steps:
(1) crushing raw ore is become the rough of granularity ﹤ 25～30mm, roughly send in the elevator by first belt conveyor;
(2) elevator rises to ore on second belt conveyor of eminence, is fed in the unpowered winnowing machine by second belt conveyor;
(3) unpowered winnowing machine is separated raw ore and mineral fine; Granularity ﹥ 1.5mm raw ore gets into roll squeezer through the current stabilization storehouse, and roll squeezer is crushed to fine grained or fine powder with raw ore, and the fine grained or the fine powder that come out from roll squeezer form the material cake; The material cake is sent in the elevator; Rough mixing the with first belt conveyor is sent into risen on second belt conveyor of eminence by elevator again, feeds in the unpowered winnowing machine through second belt conveyor; Simultaneously, the mineral fine of granularity≤1.5mm is selected and sends in the power winnowing machine, and the power winnowing machine carries out selection by winnowing once more to mineral fine; The superfine powder of selecting granularity ﹤ 0.2mm directly gets into rotoclone collector, does not select the coarse fodder of walking to send into the magnetic powder concentrator, selects smart iron powder by the magnetic powder concentrator; Gangue mineral is discharged as mine tailing, and rotoclone collector is selected the micro mist of granularity ﹤ 0.04mm, does not select the fines of walking to send into the magnetic powder concentrator; Select smart iron powder by the magnetic powder concentrator, gangue mineral is discharged as mine tailing, and micro mist gets into bag collector or cottrell; Collect by bag collector or cottrell; The part of collecting is sent into the magnetic powder concentrator, selects smart iron powder by the magnetic powder concentrator, and gangue mineral is discharged as mine tailing;
(4) repeating step (3).
As preferably, said raw ore forms the rough of granularity ﹤ 25～30mm after jaw crusher or garden conic crusher carry out grinding for twice or three times.
As preferably, the material cake that comes out from roll squeezer is got into the elevator by inclined chute.
Adopt above technical scheme, tcrude ore after fragmentation, rough granularity ﹤ 25～30mm.Roughly carry out high-pressure extrusion processing through roll squeezer; Iron ore is squeezed with material bed form in roll squeezer, and maximum effectively extruding force makes rubble be crushed to fine grained or fine powder up to 120～200MPa; Thereby make valuable mineral and gangue mineral in combination interface generation fatigue fracture; Or the generation crackle, the part combination interface can separate fully, makes very big a part of valuable mineral obtain monomer dissociation completely like this; Another does not partly have the particle of complete monomer dissociation, combines in inside can crack at the interface or internal stress yet.
The lean ore iron ore, its disseminated grain size is very thin, and the grade of ore is very low; After extruding, carry out preliminary election with selection by winnowing; According to the positive cumulative distribution rate of disseminated grain size, ore, gangue meal after the extruding are selected, with the power powder concentrator fine powder of ore and gangue is selected again; Get into rotoclone collector and also settled, select powder that smart iron powder is selected with magnetic force.Ore that granularity is bigger and gangue return roll squeezer again and push once more, and superfine powder is carried out magnetic separation after collecting with bag collector or cottrell, and selects smart iron fine powder, and gangue mineral is as mine tailing.
The invention has the beneficial effects as follows:
1, after the unpowered selection by winnowing mineral fine is separated, effectively practiced thrift the energy.
2, roll squeezer and traditional rod milling, ball milling ratio, unit raw ore power consumption falls 40～50%.
3, steel (high-abrasive material) consume, the unit raw ore is reduced to 10～20g/t by 400 original～1200g/t.
4, occupation area of equipment is little, and it is high to handle raw ore output, environmental protection, and pollutions such as no atmosphere, the lode fine powder can its usefulness, as in order to brickmaking, filler etc.
The specific embodiment
Below in conjunction with embodiment the present invention is described further:
A kind of processing ore-dressing technique of iron ore may further comprise the steps:
(1) raw ore forms the rough of granularity ﹤ 25～30mm after jaw crusher or garden conic crusher carry out grinding for twice or three times, is roughly sent in the elevator by first belt conveyor.
(2) elevator rises to ore on second belt conveyor of eminence, is fed in the unpowered winnowing machine by second belt conveyor.
(3) unpowered winnowing machine is separated raw ore and mineral fine; In the current stabilization storehouse below the raw ore of granularity ﹥ 1.5mm gets under the effect of deadweight; The mineral fine of granularity≤1.5mm is selected under wind action, and sends in the power winnowing machine through wind-force, and the subsequent handling of raw ore and mineral fine is carried out simultaneously; Wherein
The subsequent handling of raw ore is:
Raw ore in a, the current stabilization storehouse is controlled feeding capacity through the gate valve switch and the aperture size thereof of below, current stabilization storehouse, and raw ore is got in the roll squeezer;
B, raw ore pass through roll squeezer with material bed form; Under the effect of roll squeezer high pressure, raw ore is crushed to fine grained or fine powder; Thereby make valuable mineral and gangue mineral at faying face generation fatigue fracture or generation crackle, the part combination interface can separate fully, obtains the valuable mineral monomer dissociation;
C, the fine grained or the fine powder that come out from roll squeezer form the material cake; The material cake is got in the elevator by inclined chute; Rough mixing the with first belt conveyor is sent into risen on second belt conveyor of eminence by elevator again, feeds in the unpowered winnowing machine through second belt conveyor.
The subsequent handling of mineral fine is:
A, power winnowing machine carry out selection by winnowing once more to mineral fine; The superfine powder of selecting granularity ﹤ 0.2mm directly gets into rotoclone collector; Do not select the coarse fodder of walking to get into the chute type belt feeder, send into the magnetic powder concentrator by this belt feeder, the magnetic powder concentrator carries out magnetic separation to ore and gangue; Select smart iron powder, gangue mineral is discharged as mine tailing;
B, rotoclone collector are selected the micro mist of granularity ﹤ 0.04mm; Do not select the fines of walking to get into the chute type belt feeder through sedimentation, send into the magnetic powder concentrator by this belt feeder, the magnetic powder concentrator carries out magnetic separation to ore and gangue; Select smart iron powder, gangue mineral is discharged as mine tailing;
C, micro mist get into bag collector or cottrell; Collected by bag collector or cottrell, the part of collection is sent into the magnetic powder concentrator through the chute type belt feeder, and the magnetic powder concentrator carries out magnetic separation to ore and gangue; Select smart iron powder, gangue mineral is discharged as mine tailing.
(4) repeat repeatedly above-mentioned steps (3), the number of times of repetition is confirmed according to actual needs, is all accomplished until ore dressing work.
Claims (3)
1. an iron ore is processed ore-dressing technique, it is characterized in that may further comprise the steps:
(1) crushing raw ore is become the rough of granularity ﹤ 25～30mm, roughly send in the elevator by first belt conveyor;
(2) elevator rises to ore on second belt conveyor of eminence, is fed in the unpowered winnowing machine by second belt conveyor;
(3) unpowered winnowing machine is separated raw ore and mineral fine; Granularity ﹥ 1.5mm raw ore gets into roll squeezer through the current stabilization storehouse, and roll squeezer is crushed to fine grained or fine powder with raw ore, and the fine grained or the fine powder that come out from roll squeezer form the material cake; The material cake is sent in the elevator; Rough mixing the with first belt conveyor is sent into risen on second belt conveyor of eminence by elevator again, feeds in the unpowered winnowing machine through second belt conveyor; Simultaneously, the mineral fine of granularity≤1.5mm is selected and sends in the power winnowing machine, and the power winnowing machine carries out selection by winnowing once more to mineral fine; The superfine powder of selecting granularity ﹤ 0.2mm directly gets into rotoclone collector, does not select the coarse fodder of walking to send into the magnetic powder concentrator, selects smart iron powder by the magnetic powder concentrator; Gangue mineral is discharged as mine tailing, and rotoclone collector is selected the micro mist of granularity ﹤ 0.04mm, does not select the fines of walking to send into the magnetic powder concentrator; Select smart iron powder by the magnetic powder concentrator, gangue mineral is discharged as mine tailing, and micro mist gets into bag collector or cottrell; Collect by bag collector or cottrell; The part of collecting is sent into the magnetic powder concentrator, selects smart iron powder by the magnetic powder concentrator, and gangue mineral is discharged as mine tailing;
(4) repeating step (3).
2. iron ore according to claim 1 processing ore-dressing technique is characterized in that: said raw ore forms the rough of granularity ﹤ 25～30mm after jaw crusher or garden conic crusher carry out grinding for twice or three times.
3. iron ore processing ore-dressing technique according to claim 1 and 2, it is characterized in that: the material cake that comes out from roll squeezer is got into the elevator by inclined chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110401788 CN102489373B (en) | 2011-12-07 | 2011-12-07 | Mineral processing technology for processing iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110401788 CN102489373B (en) | 2011-12-07 | 2011-12-07 | Mineral processing technology for processing iron ore |
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| CN102489373A true CN102489373A (en) | 2012-06-13 |
| CN102489373B CN102489373B (en) | 2013-08-28 |
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| CN 201110401788 Active CN102489373B (en) | 2011-12-07 | 2011-12-07 | Mineral processing technology for processing iron ore |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624345A (en) * | 2015-02-15 | 2015-05-20 | 胡沿东 | Ore grinding system |
| CN104772212A (en) * | 2015-02-15 | 2015-07-15 | 胡沿东 | Separation system |
| WO2016127869A1 (en) * | 2015-02-15 | 2016-08-18 | 胡沿东 | Ore sorting system |
| WO2016127900A1 (en) * | 2015-02-15 | 2016-08-18 | 胡沿东 | Ore dressing system |
| CN108187900A (en) * | 2018-02-27 | 2018-06-22 | 承德天宝矿业集团有限公司 | Aidr bells blast system and the iron ore dressing system for including it |
Citations (6)
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| US3754713A (en) * | 1970-03-28 | 1973-08-28 | Bayer Ag | Separation of magnetizable particles |
| US6196479B1 (en) * | 1998-06-29 | 2001-03-06 | “HolderBank”Financiere Glarus AG | Method and device for granulating and comminuting liquid slags |
| CN1593775A (en) * | 2004-07-12 | 2005-03-16 | 洋浦金海铝业工贸有限公司 | Method for magnetic separating of aluminum and iron in high iron bauxite |
| CN201154320Y (en) * | 2007-12-28 | 2008-11-26 | 海城市万达机械有限公司 | Vertical superfine mill |
| CN101524665A (en) * | 2009-04-07 | 2009-09-09 | 张世平 | Process and device for high-phosphorous haematite processing |
| CN102179272A (en) * | 2011-01-07 | 2011-09-14 | 重庆京庆重型机械有限公司 | Final grinding system of rolling machine in steel slag and mineral slag micropowder production line |
-
2011
- 2011-12-07 CN CN 201110401788 patent/CN102489373B/en active Active
Patent Citations (6)
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| US3754713A (en) * | 1970-03-28 | 1973-08-28 | Bayer Ag | Separation of magnetizable particles |
| US6196479B1 (en) * | 1998-06-29 | 2001-03-06 | “HolderBank”Financiere Glarus AG | Method and device for granulating and comminuting liquid slags |
| CN1593775A (en) * | 2004-07-12 | 2005-03-16 | 洋浦金海铝业工贸有限公司 | Method for magnetic separating of aluminum and iron in high iron bauxite |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624345A (en) * | 2015-02-15 | 2015-05-20 | 胡沿东 | Ore grinding system |
| CN104772212A (en) * | 2015-02-15 | 2015-07-15 | 胡沿东 | Separation system |
| WO2016127869A1 (en) * | 2015-02-15 | 2016-08-18 | 胡沿东 | Ore sorting system |
| WO2016127900A1 (en) * | 2015-02-15 | 2016-08-18 | 胡沿东 | Ore dressing system |
| CN108187900A (en) * | 2018-02-27 | 2018-06-22 | 承德天宝矿业集团有限公司 | Aidr bells blast system and the iron ore dressing system for including it |
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| Publication number | Publication date |
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| CN102489373B (en) | 2013-08-28 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A beneficiation process for iron ore processing Granted publication date: 20130828 Pledgee: Beijing good faith financing Company limited by guarantee Pledgor: CHONGQING JINGQING HEAVY MACHINERY Co.,Ltd. Registration number: Y2024990000111 |