CN107335536A - A kind of hermetically sealed dry type of suspension roasting Iron Ore Powder throws useless technique - Google Patents

A kind of hermetically sealed dry type of suspension roasting Iron Ore Powder throws useless technique Download PDF

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Publication number
CN107335536A
CN107335536A CN201710561446.5A CN201710561446A CN107335536A CN 107335536 A CN107335536 A CN 107335536A CN 201710561446 A CN201710561446 A CN 201710561446A CN 107335536 A CN107335536 A CN 107335536A
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CN
China
Prior art keywords
useless
dry type
iron ore
hermetically sealed
grade
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.)
Pending
Application number
CN201710561446.5A
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Chinese (zh)
Inventor
王欣
展仁礼
郭忆
边立国
杏仲全
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Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
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Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
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Application filed by Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd filed Critical Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Priority to CN201710561446.5A priority Critical patent/CN107335536A/en
Publication of CN107335536A publication Critical patent/CN107335536A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/005Pretreatment specially adapted for magnetic separation
    • B03C1/015Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a kind of hermetically sealed dry type of suspension roasting Iron Ore Powder to throw useless technique, and the technique comprises the following steps:A, 0.074mm accounts for 50% refractory iron ore miberal powder after shower furnace magnetizing roast, and no air contact is cooled to less than 57 DEG C;B, screw dry magnetic separator is sent into by conveying worm after cooling down and carries out the hermetically sealed useless operation of dry type pre-selection throwing, throws useless yield, grade is determined that dry type preliminary rejection grade meets qualified tailings grade requirement by screw dry magnetic separator adjustment of rotational speed;C, throw useless rear preliminary rejection and tailing bin is sent into by conveying worm, pre- concentrate selection delivers to mill by conveying worm and selects system to handle.The present invention carries out dry type to suspension roasting Iron Ore Powder and throws useless processing, barren rock is prevented, country rock selects system into mill, prevent that ore from dishing out the generation of phenomenon with barren rock, reduces follow-up mill and hanks this generation, solves the problems, such as that irony phyllite, jasper influence sorting index;It is good to throw useless effect, can control in the useless barren rock of throwing and not contain iron ore, avoid the wasting of resources.

Description

A kind of hermetically sealed dry type of suspension roasting Iron Ore Powder throws useless technique
Technical field
The invention belongs to technical field of mineral processing, and in particular to a kind of hermetically sealed dry type of suspension roasting Iron Ore Powder throws useless work Skill.
Background technology
China's iron ore resource lean ore is more, magnetic ore deposit is few, and weak-magnetic iron ore accounts for more than the 70% of gross reserves, weak magnetic Iron ore has 10-15% barren rock, country rock to be mixed into wherein in mining, and -15mm fine ores select treatment effect through strong magnetic or jigging Bad, operation field dust is big, and preselects the iron ore for still having 50% or so during throwing is given up, and causes the wasting of resources.Without too strong magnetic Or jigging pre-selection choosing processing, the barren rock for having 10-15%, country rock are entered into roasting, grinds and selects system, first, roasting mill selects cost increase; Second, there is iron content phyllite, jasper to impact sorting index in country rock, especially SiO2Content raises, and causes sintering to use Cost increase.Suspension roasting, which needs -15mm fine ores being milled to -0.074mm, to account for 50% and could carry out magnetizing roast, and use at present The pre-selection of magnetic pulley dry type can not effectively throw the barren rock accounted for except -0.074mm in 50% roasting miberal powder.
The content of the invention
The invention aims to solve technical problem present in prior art, there is provided one kind throw useless effect it is good, after Continuous mill is hanked low, can prevent barren rock, country rock selects the hermetically sealed dry type of the suspension roasting Iron Ore Powder of system to throw useless technique into mill.
In order to achieve the above object, the present invention uses following technical scheme:A kind of hermetically sealed dry type of suspension roasting Iron Ore Powder Useless technique is thrown, the technique comprises the following steps:
A, -0.074mm accounts for 50% refractory iron ore miberal powder after shower furnace magnetizing roast, and no air contact is cooled to less than 57 DEG C;
B, screw dry magnetic separator is sent into by conveying worm after cooling down and carries out the hermetically sealed useless operation of dry type pre-selection throwing, throws useless production Rate, grade are controlled by screw dry magnetic separator rotating speed, and dry type preliminary rejection grade meets qualified tailings grade requirement;
C, throw useless rear preliminary rejection and tailing bin is sent into by conveying worm, pre- concentrate selection delivers to mill by conveying worm and selects system Processing.
Further, sintering temperature is 600-700 DEG C during magnetizing roast in the step A.
The present invention has the advantages that compared with the prior art:- 0.074mm is accounted for 50% refractory iron ore by the present invention first Stone ore powder belongs to weak-magnetic iron ore, before roasting by force through shower furnace magnetizing roast because -0.074mm accounts for 50% refractory iron ore Magnetic, jigging dry type pre-selection effect are poor, throw in useless barren rock still containing 50% or so iron ore, operating environment dust is big, through shower furnace When magnetizing roast is cooled to less than 57 DEG C, the crystallization water has removed in ore, and fine ore relatively dissipates, and is adapted to screw dry magnetic separator dry type pre- Choosing is thrown useless, and dry type is carried out to suspension roasting Iron Ore Powder and throws useless processing, has prevented barren rock, country rock selects system into mill, prevents ore The generation for phenomenon of being dished out with barren rock, reduce follow-up mill and hank this generation, solve irony phyllite, jasper influences sorting index The problem of;It is good to preselect efficiency high, the useless effect of throwing, can control in the useless barren rock of throwing and not contain iron ore, avoid the wasting of resources.Together When, suspension roasting ore deposit of the present invention is cooled to less than 57 DEG C without air contact, is directly sent into screw dry magnetic separation by conveying worm Machine carries out dry type and throws useless operation, throws the preliminary rejections such as the barren rock after giving up, country rock and is still distinguished with pre- concentrate selection by conveying worm It is sent into tailing bin and mill selects system, conveying, dry separation process is hermetically sealed, no dust discharge, meet environmental requirement.It is in addition, of the invention Hermetically sealed dry type pre-selection is carried out using screw dry magnetic separator and throws useless operation, screw dry magnetic separator is a kind of hermetically sealed, spiral Rotating speed is adapted to the not tacky magnetic material of fine fraction to throw useless operation by the adjustable dry type pre-selection device of VFC.It is of the invention complete The useless yield of useless operation throwing is thrown in sealing dry type pre-selection, taste can be determined by screw dry magnetic separator adjustment of rotational speed, dry type preliminary rejection Grade meets qualified tailings grade requirement.
Brief description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
- the 0.074mm that wine steel grade is 32% is accounted for into 50% refractory iron ore speculum iron miberal powder and carries out the hermetically sealed useless work of dry type throwing Skill, comprise the following steps:
A, -0.074mm accounts for 50% speculum iron miberal powder after magnetizing roast under temperature conditionss of the shower furnace at 650 DEG C, no air contact It is cooled to 57 DEG C.
B, it is complete close by conveying worm feeding screw dry magnetic separator progress that the -0.074mm after cooling down accounts for 50% roasting miberal powder Seal dry type pre-selection and throw operation of giving up, the useless yield of throwing, grade are controlled by screw dry magnetic separator rotating speed, are obtained throwing useless yield 12%, are thrown and give up The preliminary rejection of grade 8%, it is only 0.2% containing barren rock by being detected to throwing useless rear roasted ore laboratory dry separation, dry type preliminary rejection Grade meets qualified tailings grade requirement.
C, the preliminary rejections such as useless rear barren rock, country rock are thrown tailing bin is sent into by conveying worm, pre- concentrate selection is by helical feed Machine delivers to mill and selects system to handle, and sorting index iron concentrate grade brings up to 60%.
Embodiment 2
- the 0.074mm that wine steel grade is 33% is accounted for into 50% refractory iron ore bloodstone miberal powder and carries out the hermetically sealed useless work of dry type throwing Skill, comprise the following steps:
A, -0.074mm accounts for 50% bloodstone miberal powder after magnetizing roast under temperature conditionss of the shower furnace at 600 DEG C, no air contact It is cooled to 55 DEG C.
B, it is complete close by conveying worm feeding screw dry magnetic separator progress that the -0.074mm after cooling down accounts for 50% roasting miberal powder Seal dry type pre-selection and throw operation of giving up, the useless yield of throwing, grade are controlled by screw dry magnetic separator rotating speed, are obtained throwing useless yield 11%, are thrown and give up The preliminary rejection of grade 7.6%, it is only 0.18% containing barren rock by being detected to throwing useless rear roasted ore laboratory dry separation, dry type pre-selection Tailings grade meets qualified tailings grade requirement.
C, the preliminary rejections such as useless rear barren rock, country rock are thrown tailing bin is sent into by conveying worm, pre- concentrate selection is by helical feed Machine delivers to mill and selects system to handle, and sorting index iron concentrate grade brings up to 59%.
Embodiment 3
The refractory iron ore complexity symbiotic iron ore stone ore powder that wine steel grade is 32% is subjected to hermetically sealed dry type and throws useless technique, bag Include following steps:
A, -0.074mm accounts for 50% complicated symbiotic iron ore stone ore powder after magnetizing roast under temperature conditionss of the shower furnace at 700 DEG C, nothing Air contact is cooled to 53 DEG C.
B, it is complete close by conveying worm feeding screw dry magnetic separator progress that the -0.074mm after cooling down accounts for 50% roasting miberal powder Seal dry type pre-selection and throw operation of giving up, the useless yield of throwing, grade are controlled by screw dry magnetic separator rotating speed, are obtained throwing useless yield 13%, are thrown and give up The preliminary rejection of grade 7.8%, it is only 0.21% containing barren rock by being detected to throwing useless rear roasted ore laboratory dry separation, dry type pre-selection Tailings grade meets qualified tailings grade requirement.
C, the preliminary rejections such as useless rear barren rock, country rock are thrown tailing bin is sent into by conveying worm, pre- concentrate selection is by helical feed Machine delivers to mill and selects system to handle, and sorting index iron concentrate grade brings up to 61%.

Claims (2)

1. a kind of hermetically sealed dry type of suspension roasting Iron Ore Powder throws useless technique, it is characterised in that the technique comprises the following steps:
A, -0.074mm accounts for 50% refractory iron ore miberal powder after shower furnace magnetizing roast, and no air contact is cooled to less than 57 DEG C;
B, screw dry magnetic separator is sent into by conveying worm after cooling down and carries out the hermetically sealed useless operation of dry type pre-selection throwing, throws useless production Rate, grade are controlled by screw dry magnetic separator rotating speed, and dry type preliminary rejection grade meets qualified tailings grade requirement;
C, throw useless rear preliminary rejection and tailing bin is sent into by conveying worm, pre- concentrate selection delivers to mill by conveying worm and selects system Processing.
2. the hermetically sealed dry type of a kind of suspension roasting Iron Ore Powder according to claim 1 throws useless technique, it is characterised in that:It is described Sintering temperature is 600-700 DEG C during magnetizing roast in step A.
CN201710561446.5A 2017-07-11 2017-07-11 A kind of hermetically sealed dry type of suspension roasting Iron Ore Powder throws useless technique Pending CN107335536A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100334295B1 (en) * 1999-11-30 2002-05-03 곽영훈 Dry Purification Method for Removing Iron and Titanium Oxide from Kaoline
CN101204681A (en) * 2007-09-03 2008-06-25 李艳军 Method of refining iron ore from alkaline red mud and making gangue neutral
CN103572040A (en) * 2013-11-22 2014-02-12 中国矿业大学(北京) Method for reducing carbon, sulfur and iron of fly ash and recovering iron ore concentrate
CN103643030A (en) * 2013-11-20 2014-03-19 长沙矿冶研究院有限责任公司 Mineral processing process for preparing qualified iron concentrate by adopting oolitic iron mine as raw material
CN104131156A (en) * 2014-07-28 2014-11-05 鞍钢集团矿业公司 Magnetizing roasting-magnetic ore separation method for fine-grain hematite
CN104694760A (en) * 2015-03-20 2015-06-10 湖南长拓高科冶金有限公司 Method and system for processing red mud to recycle refined iron powder
CN104726690A (en) * 2015-03-30 2015-06-24 东北大学 Hematite-siderite-limonite mixed iron ore three-stage suspension roasting-magnetic separation method
CN104152718B (en) * 2014-07-21 2015-10-21 中南大学 A kind of method of stanniferous iron tailings separated in synchronization tin and iron
CN105772216A (en) * 2016-03-28 2016-07-20 东北大学 Novel method for producing iron concentrates through complex refractory iron ore
CN106755969A (en) * 2016-11-24 2017-05-31 东北大学 A kind of method of reinforced by additive bloodstone magnetizing roast

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100334295B1 (en) * 1999-11-30 2002-05-03 곽영훈 Dry Purification Method for Removing Iron and Titanium Oxide from Kaoline
CN101204681A (en) * 2007-09-03 2008-06-25 李艳军 Method of refining iron ore from alkaline red mud and making gangue neutral
CN103643030A (en) * 2013-11-20 2014-03-19 长沙矿冶研究院有限责任公司 Mineral processing process for preparing qualified iron concentrate by adopting oolitic iron mine as raw material
CN103572040A (en) * 2013-11-22 2014-02-12 中国矿业大学(北京) Method for reducing carbon, sulfur and iron of fly ash and recovering iron ore concentrate
CN104152718B (en) * 2014-07-21 2015-10-21 中南大学 A kind of method of stanniferous iron tailings separated in synchronization tin and iron
CN104131156A (en) * 2014-07-28 2014-11-05 鞍钢集团矿业公司 Magnetizing roasting-magnetic ore separation method for fine-grain hematite
CN104694760A (en) * 2015-03-20 2015-06-10 湖南长拓高科冶金有限公司 Method and system for processing red mud to recycle refined iron powder
CN104726690A (en) * 2015-03-30 2015-06-24 东北大学 Hematite-siderite-limonite mixed iron ore three-stage suspension roasting-magnetic separation method
CN105772216A (en) * 2016-03-28 2016-07-20 东北大学 Novel method for producing iron concentrates through complex refractory iron ore
CN106755969A (en) * 2016-11-24 2017-05-31 东北大学 A kind of method of reinforced by additive bloodstone magnetizing roast

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Application publication date: 20171110