CN107377205A - A kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique - Google Patents
A kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique Download PDFInfo
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- CN107377205A CN107377205A CN201710562271.XA CN201710562271A CN107377205A CN 107377205 A CN107377205 A CN 107377205A CN 201710562271 A CN201710562271 A CN 201710562271A CN 107377205 A CN107377205 A CN 107377205A
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- iron ore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
- B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique, step：Magnetizing roast is carried out to 0.3mm oxidation refractory iron ores using shower furnace, roasted ore is cooled to less than 57 DEG C, it is useless that dry type pre-selection throwing is carried out to roasted ore using screw dry magnetic separator, throw useless rear roasted ore and carry out wet-milling, granularity 0.074mm accountings 70% or so, it is selected to carry out three sections of wet types of weak magnetic separator, reverse flotation, two sections, three sections, flotation tailing is after magnetic separator is enriched with, it is enriched with mine tailing and one section of cleaner tailings, useless rear barren rock is thrown together to discharge by qualified tailings, Grade Control is below 9%, the filtered dehydration of concentrate after enrichment, break up and return to the closed circuit magnetizing roast of shower furnace progress, concentrate through reverse flotation is final qualified concentrate containing, grade reaches more than 60%.The technique realizes iron resource in online closed circuit recovery mine tailing, avoids feeding Tailings Dam secondary recovery from hanking the problem of this is high again.
Description
Technical field
The invention belongs to iron ore to select burning technology field, and it is circulating to be related to a kind of iron ore suspension roasting magnetic separation flotation tailing
It is non-topple over utilize technique.
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 is handled through magnetizing roast, after being changed into strongly magnetic mineral, can carry out magnetic separation, reverse flotation, is obtained quality and is met sintering
The iron ore concentrate of dispensing requirements.+ 15mm grades iron ore directly uses shaft furnace magnetizing roast, and -15mm grade iron ores are milled to -
0.3mm enters shower furnace and carries out magnetizing roast, because difficulty selects ferric oxide ore size fractionated to have different magnetizing roast characteristics, roasting
Time, sintering temperature are different, and certain limit grade iron ore enters shower furnace magnetizing roast, roasting quality inequality unavoidably be present
The problem of even, that is, with the presence of rawore is burnt, cause tailings grade to be up to 17-22%, metal recovery rate is only 78% or so, and
Tailing dam is sent into the filtered dehydration of mine tailing, and secondary recovery spends very big cost using needs.
The content of the invention
The present invention is directed to certain size fraction ranges refractory iron ore suspending magnetization roasting, and roasted ore quality is uneven, magnetic separation tail
The problem of ore deposit grade is high, can recycle but be sent into tailing dam, and secondary recovery utilizes cost high, there is provided a kind of iron ore hangs
Floating calcining magnetic separation flotation tailing it is circulating it is non-topple over utilize technique.
The present invention adopts the following technical scheme that：
A kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over using technique, specifically include following steps：
A. magnetizing roast is carried out to oxidation refractory iron ore using shower furnace, roasted ore is cooled to less than 57 DEG C；
B. it is useless that dry type pre-selection throwing is carried out to roasted ore using screw dry magnetic separator, throws useless Grade Control within 8%；
C. throw the pre- concentrate selection after giving up and grind choosing and reverse flotation by three sections of weak magnetic wet types, be milled to -0.074mm accountings 70% or so,
Concentrate is final qualified concentrate containing after reverse flotation, and grade reaches more than 60%；
D. weak magnetic it is selected two sections, three sections, reverse flotation mine tailing after magnetic separator is enriched with, enrichment mine tailing and one section of mine tailing, throw it is useless after it is useless
Stone is together discharged by qualified tailings, and Iron Grade of Tailings is controlled below 9%；
E. the filtered dehydration of concentrate, drying, which are broken up, after being enriched with returns to the closed circuit magnetizing roast of shower furnace progress, magnetic separation, reverse flotation；
F. because for magnetic iron ore in continuous ore dressing, easily formation disk pack wraps up in phenomenon, influences the selected index of wet type, needs after roasting
At each section it is selected before install demagnetization device additional, de- magnetic is carried out to previous stages of magnetic separation processing iron ore concentrate, selected created conditions for next section.
Step A refractory iron ores include speculum iron, bloodstone, limonite, siderite and complicated symbiotic iron ore stone, and category is weak
Armco magnetic iron ore, qualified iron ore concentrate need to can be obtained by magnetic separation, reverse flotation after magnetizing roast.
Due to containing 10% or so country rock in raw ore, so step B carries out dry type using screw dry magnetic separator to roasted ore
Pre-selection, which is thrown, gives up, and throws waste product position by adjusting revolution speed of screw control, throws useless Grade Control below 8%, reduce follow-up ore grinding amount, drop
Low production cost.
Because difficulty selects ferric oxide ore to be milled to -0.3mm grade shower furnace magnetizing roasts, certain size fraction ranges iron ore enters stove
There is the problem of roasted ore quality is uneven in roasting, cause two sections of weak magnetic mill choosings, three sections of weak magnetic mills to select tailings grade to reach unavoidably
17-20%, belong to unqualified mine tailing, the value for having recycling, so step D carries out mineral enrichment.
Enrichment concentrate grade reaches 30% or so obtained by step D, and category burns pig iron ore, must it is fired after could by magnetic separation,
Reverse flotation produces the qualified iron ore concentrate of grade more than 60%, after then the filtered dehydration of enrichment concentrate, drying are broken up, returns and suspends
Stove enters calcining magnetic separation reverse floatation process system, forms online closed circuit tailings recovery process.
The beneficial effects of the invention are as follows：The present invention is according to the certain size fraction ranges iron ore shower furnace Roasting of refractory iron ore
It is uneven to burn quality, causes tailings grade height, metal recovery rate low, mine tailing, which has to recycle, is worth this feature, develops
Magnetic separation, the unqualified mine tailing of reverse flotation closed circuit recycling technique online, reduce mine tailing and be sent into what tailing dam recycled again
Cost, improve resource utilization.
Brief description of the drawings
The process chart of Fig. 1 present invention.
Embodiment
The oxidation refractory iron ore that the present invention implements to use derives from Jiuquan Iron ＆ Steel Co.'s Orebody in Jingtieshan ore deposit.
- 15mm Orebody in Jingtieshan oxidation the refractory iron ore of wine steel grade 32% is subjected to following handle：
A. it is milled to -0.3mm and is sent into shower furnace progress magnetizing roast, roasted ore is cooled to 57 DEG C；
B. it is useless that dry type pre-selection throwing is carried out to roasted ore using screw dry magnetic separator, throws waste product position below 8%；
C. the pre- concentrate selection after giving up is thrown by one section, two sections, three sections of choosings of weak magnetic wet types mill, reverse flotations, is milled to -0.074mm accountings
70% or so, concentrate is final qualified concentrate containing after reverse flotation, and grade reaches more than 60%；
D. the selected one section of tailings grade of weak magnetic is discharged below 8% by qualified tailings, two sections, three sections, reverse flotation tailings grade 19%,
After magnetic separator is enriched with, tailings grade 10% is enriched with, is together discharged with one section of mine tailing, the useless rear barren rock of throwing by qualified tailings, total mine tailing
Iron grade is controlled below 9%, is enriched with concentrate grade 30%, and filtered dehydration, drying, which are broken up, returns to shower furnace closed circuit recovery online
Magnetizing roast, magnetic separation, reverse flotation, it is final to obtain iron concentrate grade 60%, the index of metal recovery rate 88%.
Claims (2)
1. a kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique, it is characterised in that：Specifically include
Following steps：
A. magnetizing roast is carried out to oxidation refractory iron ore using shower furnace, roasted ore is cooled to less than 57 DEG C；
B. it is useless that dry type pre-selection throwing is carried out to roasted ore using screw dry magnetic separator, throws useless Grade Control below 8%；
C. the pre- concentrate selection after giving up is thrown by one section, two sections, three sections of weak magnetic wet types mill choosings and reverse flotation, is milled to -0.074mm's
Accounting 70% or so, concentrate is final qualified concentrate containing after reverse flotation, and grade reaches more than 60%；
D. the choosing of two sections of weak magnetics mill, three sections of choosings of weak magnetics mill, reverse flotation mine tailings are enriched with through magnetic separator, mine tailing and one section of mine tailing after enrichment,
Throw useless rear barren rock together to discharge by qualified tailings, Iron Grade of Tailings is controlled below 9%；
E. the filtered dehydration of concentrate, drying, which are broken up, after being enriched with returns to the closed circuit magnetizing roast of shower furnace progress, magnetic separation, reverse flotation；
F. because for magnetic iron ore in continuous ore dressing, easily formation disk pack wraps up in phenomenon, influences the selected index of wet type, needs after roasting
At each section it is selected before install demagnetization device additional, de- magnetic is carried out to previous stages of magnetic separation processing iron ore concentrate, selected created conditions for next section.
2. a kind of as claimed in claim 1 iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over using technique, its
It is characterised by：Oxidation refractory iron ore described in step A includes speculum iron, bloodstone, limonite, siderite and complicated symbiosis
Iron ore.
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| CN201710562271.XA CN107377205B (en) | 2017-07-11 | 2017-07-11 | A kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique |
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| CN201710562271.XA CN107377205B (en) | 2017-07-11 | 2017-07-11 | A kind of iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique |
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| CN107377205A true CN107377205A (en) | 2017-11-24 |
| CN107377205B CN107377205B (en) | 2019-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930843A (en) * | 2017-11-28 | 2018-04-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore suspension roasting dry type preliminary rejection is returned mine stove method of roasting again |
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| CN105689126A (en) * | 2016-05-11 | 2016-06-22 | 河北省地矿中心实验室 | Mineral processing process for oolitic hematite |
| CN106334622A (en) * | 2016-08-26 | 2017-01-18 | 中冶北方（大连）工程技术有限公司 | Beneficiation process for pulverized mine of specularite in alpine region |
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| CN1857783A (en) * | 2006-05-30 | 2006-11-08 | 长沙矿冶研究院 | Beneficiation method for weak magnetic iron ores such as siderite, limonite and siderite paragenetic ore |
| CN102527492A (en) * | 2010-12-07 | 2012-07-04 | 沈阳有色金属研究院 | Method for preparing super iron ore concentrate by using low-grade magnetic iron ore |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107930843A (en) * | 2017-11-28 | 2018-04-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore suspension roasting dry type preliminary rejection is returned mine stove method of roasting again |
| CN107930843B (en) * | 2017-11-28 | 2019-11-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore suspension roasting dry type preliminary rejection is returned mine furnace method of roasting again |
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| CN107377205B (en) | 2019-03-12 |
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