CN100398215C - Dry mineral separation technology process for producing iron refine ore from iron ore containing magnetic - Google Patents
Dry mineral separation technology process for producing iron refine ore from iron ore containing magnetic Download PDFInfo
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- CN100398215C CN100398215C CNB2004100829567A CN200410082956A CN100398215C CN 100398215 C CN100398215 C CN 100398215C CN B2004100829567 A CNB2004100829567 A CN B2004100829567A CN 200410082956 A CN200410082956 A CN 200410082956A CN 100398215 C CN100398215 C CN 100398215C
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Abstract
The present invention relates to dry ore separation technology process for magnetite, particularly to dry mineral separation technology process for producing fine iron ore powder from iron ore containing magnetism. The present invention mainly carries out three stage magnetic separation processing for powdered ore; the magnetic field intensity selected by the magnetic separation is 400 to 1250GS and the rotation speed of a magnetic drum is 60 to 320 revolutions per minute; through the dry magnetic separation, the iron content of the fine iron powdered ore of the ore with 35% of iron content can reach 65%. Having the advantages of 90% ore utilization rate, no water participation in the technological process, and water saving, the present invention lowers cost and reduces pollution; the dust in the magnetic separation is caught by a dust removal device, so the present invention can not cause air pollution. Having the advantages of high productive efficiency, good product quality and no environment pollution, the present invention is a creative technology process.
Description
Technical field:
The present invention relates to a kind of mining industry beneficiation method, relate to a kind of dry method ore-dressing technique method of magnetic iron ore specifically.
Background technology:
Containing magnetic iron ore produces fine iron breeze and adopts wet dressing in now producing, this method production history is long, the ore-dressing technique maturation, having major defect is that the ore resource utilization rate is lower, generally below 75%, and water consumption is higher, and one ton of fine iron breeze of every production needs 3.45 tons of water consumptions, and pollutes big, the magnetic separator magnetic field intensity is 1550～1750GS, under the strong magnetic field action, bring the impurity content height of fine iron breeze into, therefore lower to lean ore and difficult ore dressing finished product fine iron breeze quality, inaccessible standard-required, its sale price is lower, directly influences the business economic benefit, and the low magnetic of dry method is produced fine iron breeze and do not appeared in the newspapers as yet.
Summary of the invention:
The present invention is directed to the existing problem of existing wet production fine iron breeze, a kind of ore utilization rate height, water saving, little, the fine iron breeze product quality height of pollution are provided, can be used for the dry method ore-dressing technique method of the fine iron breeze of lean ore and difficult ore dressing.For solving the existing problem of existing wet production fine iron breeze, of the present invention to contain magnetic iron ore dry method ore-dressing technique method as follows:
Technical process:
Ore particle diameter＞50mm, promptly carry out coarse crushing through fragmentation, particle diameter is 30～50mm after the coarse crushing, ore after the coarse crushing enters fine crusher and is crushed to ore particle diameter＜30mm, ore after in small, broken bits enters flour mill and makes 80～140 order breezes, breeze enters I level magnetic separator, the magnetic separator magnetic field intensity is 900～1200GS, and the magnetic drum rotating speed is 60～180 rev/mins, and iron powder enters II level magnetic separator after the magnetic separation, magnetic field intensity is 700～900GS, the magnetic drum rotating speed is 200～270 rev/mins, and the iron powder after the magnetic separation enters III level magnetic separator, and the magnetic separator magnetic field intensity is 400～700GS, 280～320 rev/mins of magnetic drum rotating speeds make the fine iron breeze finished product after the magnetic separation.
Ore coarse crushing, in small, broken bits, indication range that abrasive dust is controlled are that non-selective index is processing back breeze particle size distribution data.
Magnetic separation magnetic field intensities at different levels, magnetic drum rotating speed are mainly selected according to ore magnetic susceptibility, magnetic susceptibility is more than 70%: magnetic field intensity is 400～900GS, magnetic susceptibility 50～70%: magnetic field intensity is 500～1000GS, magnetic susceptibility is lower than 50%: magnetic field intensity 600～1200GS, the selection magnetic field intensity will be in conjunction with magnetic separator equipment, and general magnetic separator magnetic field intensity is and is fixed on the certain limit.The magnetic drum rotating speed also determines according to breeze removing impurities difficulty or ease, can be fast for easy ore dressing rotating speed, and III level magnetic separation magnetic drum rotating speed is higher than II level magnetic separation magnetic drum rotating speed.
The magnetic separation slag drains into conveyer belt by slag outlet and transports processing site, on every magnetic separator dust arrester is housed, and can capture the dust that produces in the processing effectively.Technology of the present invention can adopt continued operation or intermittently operated.
According to method of the present invention, to Fe
3O
420～50% (same under the mass parts),
FeS
21～20%, Fe
2O
35～20%, ferrosilite 1～15%, SiO
215～30% ore carries out three grades of magnetic separation, and its fine iron breeze can reach Fe:63～65%; Si:2～5%;
S:0.001～0.5%; Its technical indicator of P:0.001～0.08% reaches or near Ministry of Metallurgical Industry fine iron breeze is contained the requirement of Fe 65%.
Dry dressing method of the present invention: be applicable to the magnetic iron ore of easy choosing, be applicable to the sedimentary rock ore that crystalline particle is superfine yet, sulphur iron ore, high silicon iron ore are not suitable for bloodstone stone and non-magnetic iron stone.
The principle of dry method ore dressing of the present invention and effect: in wet method, adopt the highfield of 1550～1750GS that mud is carried out magnetic separation, and this magnetic field intensity is always for generally acknowledging, study and select for use low magnetic field intensity to carry out magnetic separation nobody, along with the minimizing of rich ore amount with to the exploitation of lean ore and difficult ore dressing, original wet method is inapplicable, its reason is: lean ore is under the effect of highfield, some impurity enter in the finished product with iron powder, cause the fine iron breeze iron-holder to be difficult to reach requirement, and the wet production water consumption is big, area for some water resources shortages, adopt wet production more difficult, dry production is mainly selected magnetic field intensity according to ore magnetic susceptibility, under this magnetic field intensity, iron powder is adsorbed on the magnetic drum, and impurity seldom is brought into, especially three grades of magnetic separation are lower in the magnetic field intensity that the III level adopts, except that iron powder, other is as sulfur-bearing, impurity such as phosphorus and silicon then is discharged in the slag, so sulphur in the fine iron breeze finished product, phosphorus, the content of silicon is low, the magnetic separator that dry dressing method of the present invention is selected is because magnetic drum is 270 degree magnetic field areas, this is bigger more than 1/3 than common magnetic drum 130～180 degree magnetic field areas, help enhancing productivity, magnet in the magnetic drum is a magnet, cause field region having, replace variation continuously, in change procedure, iron powder is along with magnetic field has, no change and beating, help the removing of impurity, dry process of the present invention, magnetic drum is controlled by variable-frequency motor, the constant speed drive of the general magnetic separator magnetic drum of its speed ratio has than remarkable advantages, select different rotating speeds for use according to different ore kinds, the breeze that magnetic susceptibility is higher, can adopt 280～320 times/minute, production efficiency height like this, and adopt 60～70 times/minute for the lower breeze of magnetic susceptibility, then can effectively iron powder be screened, the reason rotating speed is not discharged in the slag soon, therefore this method iron in ore utilization rate is calculated by ore magnetic susceptibility and can be reached more than 90%, make full use of resource, reduce production costs.
Because the inventive method does not have water carrier, therefore there is not discharge of wastewater, reduce environmental pollution, the not moisture transportation burden that alleviates of fine iron breeze.The dust that produces in the production process is captured by deduster, can not cause dust atmosphere to pollute, and in sum, the dry magnetic separation iron ore is a kind of production efficiency height, good product quality, the creative process of non-environmental-pollution.
The specific embodiment:
Embodiment 1:
Ore source: the bottom of a pan, Dashiqiao City, Liaoning Province iron ore
Technical indicator: ore particle diameter: 50～100mm; Main component (mass fraction):
Fe 38% Si 13% S 0.8% magnetic susceptibility 85%
Process:
1, coarse crushing:
Equipment: PE250 * 400 jaw crushers (production of Chaoyang Heavy Machinery Plant)
Disposal ability: 18t/h
Granularity after the coarse crushing: 30～50mm sends into fine crusher after the coarse crushing;
2, in small, broken bits:
Equipment: PEX150 * 750 jaw crushers (production of Chaoyang Heavy Machinery Plant)
Disposal ability: 18t/h
Back particle diameter＜30mm in small, broken bits; Send into flour mill after in small, broken bits;
3, abrasive dust:
Equipment: the 5R4119 thunder covers pulverizer (Dashiqiao City Hong Guangjixiechang production)
Disposal ability: 18t/h
Diameter of particle: 80～140 orders; Breeze is sent into I level magnetic separator behind the abrasive dust;
4, I level magnetic separation:
Equipment: GXT-18 magnetic separator (Dashiqiao City Practical science technical research institute)
Cylinder magnetic field area is 270 degree discs;
Magnetic field hunting frequency: 120 times/minute;
Disposal ability is 18t/h
Magnetic field intensity: 600～800GS (being magnetic separator magnetic field intensity scope, down together)
The magnetic drum rotating speed: iron powder is sent into II level magnetic separator after the magnetic separation of 180 rev/mins of I levels;
5, II level magnetic separation:
Equipment: the same
Magnetic field intensity: 600～800GS
The magnetic drum rotating speed: iron powder is sent into III level magnetic separator after the magnetic separation of 300 rev/mins of II levels:
6, III level magnetic separation:
Equipment: the same
Magnetic field intensity: 400～600GS
Magnetic drum rotating speed: 320 rev/mins
The magnetic separator that this technology is selected, the magnetic field swing on the magnetic drum can have or not regional change, helps the removing of slag
Deduster is housed on magnetic separator, captures dust in the process, to adopting the conveyer belt transported material the magnetic separation of III level, slag is drained on the conveyer belt by the magnetic separator slag outlet and transports after the magnetic separation from the ore coarse crushing, and the gained fine iron breeze is finished product after three grades of magnetic separation.
The technical indicator of fine iron breeze after the magnetic separation:
Fe:66.67%; Si:5.28%; S:0.12%; Mine tailing contains Fe:4.03%;
The smart powder of iron per ton calculates:
The norm quota of consumption:
Ore: 2.15t; : 35w;
Contrast method: wet method contrast routinely:
Fine iron breeze Fe:64.02%; Si:8.34%; S:0.43%;
Mine tailing iron-holder: T 14.35%; Moisture 15～20% do not control in the Iron Ore Powder;
Consumption norm: fine iron breeze per ton calculates:
Ore: 2.52t; : 40w; Water: 3.45t.
Embodiment 2:
Ore source: the bottom of a pan, Dashiqiao City, Liaoning Province iron ore
Technical indicator: ore particle diameter: 50～100mm; Main component (mass fraction):
Fe 35.5% Si 16.5% S 1.24% magnetic susceptibility 70%
Process: coarse crushing, in small, broken bits, abrasive dust are with embodiment 1:
The magnetic separation of I level:
Equipment: with embodiment 1:
Magnetic field intensity: 800～1000GS
Magnetic drum rotating speed: 150 rev/mins
The magnetic separation of II level:
Equipment: with embodiment 1:
Magnetic field intensity: 800～1000GS
Magnetic drum rotating speed: 250 rev/mins
The magnetic separation of III level:
Equipment: with embodiment 1:
Magnetic field intensity: 600～800GS
The magnetic drum rotating speed: 300 rev/mins other is with embodiment 1:
The technical indicator of fine iron breeze after the magnetic separation:
Fe：65.2％；Si：5.5％；S：0.21％；
Embodiment 3:
Ore source: the difficult ore dressing in Lanxian County, Luliang Prefecture, Shanxi
Technical indicator: Fe 38% Si 25% S 0.42% magnetic susceptibility 50%
Process: coarse crushing, in small, broken bits, abrasive dust are with embodiment 1:
The magnetic separation of I level:
Equipment: with embodiment 1:
Magnetic field intensity: 1000～1200GS
Magnetic drum rotating speed: 80 rev/mins
The magnetic separation of II level:
Equipment: with embodiment 1:
Magnetic field intensity: 800～1000GS
Magnetic drum rotating speed: 180 rev/mins
The magnetic separation of III level:
Equipment: with embodiment 1:
Magnetic field intensity: 600～800GS
The magnetic drum rotating speed: 220 rev/mins other is with embodiment 1;
The technical indicator of fine iron breeze after the magnetic separation:
Fe：65.8％；Si：5.2％；S：0.04％；
Claims (1)
1. one kind contains magnetic iron ore dry method ore-dressing technique method, it is characterized in that: its technological process is: ore particle diameter＞50mm, promptly carry out coarse crushing through fragmentation, particle diameter is 30～50mm after the coarse crushing, ore after the coarse crushing enters fine crusher and is crushed to ore particle diameter＜30mm, ore after in small, broken bits enters flour mill and makes 80～140 order breezes, breeze enters I level magnetic separator, the magnetic separator magnetic field intensity is 900～1200GS, the magnetic drum rotating speed is 60～180 rev/mins, iron powder enters II level magnetic separator after the magnetic separation, and magnetic field intensity is 700～900GS, and the magnetic drum rotating speed is 200～270 rev/mins, iron powder after the magnetic separation enters III level magnetic separator, the magnetic separator magnetic field intensity is 400～700GS, and 280～320 rev/mins of magnetic drum rotating speeds make the fine iron breeze finished product after the magnetic separation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100829567A CN100398215C (en) | 2004-12-14 | 2004-12-14 | Dry mineral separation technology process for producing iron refine ore from iron ore containing magnetic |
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|---|---|---|---|
| CNB2004100829567A CN100398215C (en) | 2004-12-14 | 2004-12-14 | Dry mineral separation technology process for producing iron refine ore from iron ore containing magnetic |
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|---|---|
| CN1623669A CN1623669A (en) | 2005-06-08 |
| CN100398215C true CN100398215C (en) | 2008-07-02 |
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| CNB2004100829567A Expired - Fee Related CN100398215C (en) | 2004-12-14 | 2004-12-14 | Dry mineral separation technology process for producing iron refine ore from iron ore containing magnetic |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214468B (en) * | 2007-12-29 | 2010-04-14 | 内蒙古科技大学 | Technique for choosing niobium from ferrum, rare earth and niobium paragenic ore |
| CN101385992B (en) * | 2008-10-20 | 2010-06-02 | 海盐机械厂 | Dry dressing method for separating iron from iron ore |
| CN101733195A (en) * | 2008-11-20 | 2010-06-16 | 李家珍 | Combined ore dressing process for iron ore concentrate powder and boron ore concentrate powder produced by magnetic ludwigite |
| CN101559403B (en) * | 2009-05-31 | 2013-03-20 | 安徽大昌矿业集团有限公司 | Method for concentrating extremely low-grade refractory magnetite |
| CN103143438A (en) * | 2013-03-05 | 2013-06-12 | 许建民 | Production technique of magnetite refined powdered iron by dry process |
| CN106179706B (en) * | 2016-08-04 | 2019-08-23 | 山东济钢合金材料科技有限公司 | A method of separating the iron oxide mixed from iron powder |
| CN110947514B (en) * | 2019-12-23 | 2022-01-18 | 佛山市高明星源机械有限公司 | Iron removing method for non-metallic ore system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2558635A (en) * | 1947-12-15 | 1951-06-26 | Hanna Coal And Ore Corp | Process for treating a magnetic iron ore |
| US3022956A (en) * | 1958-04-14 | 1962-02-27 | Int Minerals & Chem Corp | Beneficiation of ores |
| US3502271A (en) * | 1967-05-29 | 1970-03-24 | Univ Minnesota | Iron ore treating process |
| US3672579A (en) * | 1970-08-10 | 1972-06-27 | Univ Minnesota | Process for beneficiating magnetite iron ore |
| CN1301602A (en) * | 1999-12-27 | 2001-07-04 | 鞍钢集团弓长岭矿业公司 | Fine sieve 'magnet-gravity ore dressing machine' ore dressing technique |
-
2004
- 2004-12-14 CN CNB2004100829567A patent/CN100398215C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2558635A (en) * | 1947-12-15 | 1951-06-26 | Hanna Coal And Ore Corp | Process for treating a magnetic iron ore |
| US3022956A (en) * | 1958-04-14 | 1962-02-27 | Int Minerals & Chem Corp | Beneficiation of ores |
| US3502271A (en) * | 1967-05-29 | 1970-03-24 | Univ Minnesota | Iron ore treating process |
| US3672579A (en) * | 1970-08-10 | 1972-06-27 | Univ Minnesota | Process for beneficiating magnetite iron ore |
| CN1301602A (en) * | 1999-12-27 | 2001-07-04 | 鞍钢集团弓长岭矿业公司 | Fine sieve 'magnet-gravity ore dressing machine' ore dressing technique |
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