CN105797847A - Method for removing strongly magnetic tailings from iron ore combined tailings through dry separation - Google Patents
Method for removing strongly magnetic tailings from iron ore combined tailings through dry separation Download PDFInfo
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- CN105797847A CN105797847A CN201610150162.2A CN201610150162A CN105797847A CN 105797847 A CN105797847 A CN 105797847A CN 201610150162 A CN201610150162 A CN 201610150162A CN 105797847 A CN105797847 A CN 105797847A
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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
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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
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Abstract
The invention relates to a method for removing strongly magnetic tailings from iron ore combined tailings through dry separation. The iron ore combined tailings contain the strongly magnetic tailings, weak magnetic tailings and flotation tailings; as the strongly magnetic tailings are low in magnetism and high in grade, iron resources can be recycled through calcination and magnetic separation; and the weak magnetic tailings are high in magnetism and low in grade, the flotation tailings are high in magnetism, thin in particle and high in grade and sulfur dioxide content, and the weak magnetic tailings and the flotation tailings cannot be recycled due to the high sulfur dioxide content. In order to sufficiently recycle the iron resources contained in the combined tailings, the tailing treatment method includes the steps that after the combined tailings with low water content are scattered by a block scattering machine, powdery combined tailings are subjected to dry-type magnetic separation through a twin-helix magnetic separation machine, then iron-containing materials, high in magnetism and high in grade, in the tailings are made to be separated from other ore, and weak magnetic tailings high in grade are obtained; and after calcination and magnetic separation, iron ore concentrate with the grade being 54% or over can be obtained. The obtained magnetic separation tailings can be utilized as a building material or a filling material.
Description
Technical field
The invention belongs to the solid waste utilization of resources and technical field of mineral processing, be specifically related to the comprehensive dry tail ore dressing of a kind of iron ore and throw the method except ferromagnetism mine tailing.
Background technology
Mineral resources are basis and the guarantees of the national economic development, are also the highly important ingredients in human survival and social development activity.Along with China's expanding economy, a large amount of iron ore deposit of demand, but along with the exploitation of mineral resources, easily select mineral resources more and more shorter, and iron ore tailings is contained a large amount of iron ore deposit, select ferrum to have the advantages that cost is low from mine tailing.
Iron ore tailings is raw iron ores or magnetizing roast mineral general name of leftover materials after broken, ore grinding and magnetic separation process and sort out iron ore concentrate, the comprehensive mine tailing of iron ore has high intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing and flotation tailing, high intensity magnetic separation mine tailing is the product after adopting the high field intensity of 20000Oe to carry out magnetic separation after ore grinding, low intensity magnetic separation mine tailing is the product after adopting the field intensity of 1250Oe to carry out magnetic separation after ore grinding, and flotation tailing is the product after magnetic tailing carries out flotation.In mine tailing, essential mineral composition is stone-like pulse (such as quartz, pyroxene, Anhydrite, garnet, hornblend and altered mineral thereof) and iron oxides, chemical composition mainly based on ferrum, silicon, magnesium, calcium, aluminum oxide, and with a small amount of phosphorus, sulfur etc., Iron grade is generally 17～23%.Strong magnetic tail ore deposit belongs to weak magnetic mineral, of high grade, after magnetizing roast, magnetic separation process, it is possible to obtain grade more than 54% iron ore concentrate；Low intensity magnetic separation mine tailing and flotation tailing belong to ferromagnetism mine tailing, and grade is relatively low, and SiO2 content is high, it is impossible to again recycle.
Iron ore tailings belongs to difficulty and selects low-grade iron ore resource, current domestic commonly used magnetic separation technology develops and utilizes, its production technology be tail after multiple tracks magnet drum magnetic separation, obtain rough concentrate that grade is 30～40% and process then through flotation, the iron ore concentrate that grade is more than 54% can be obtained.The advantage of this method is to be met the iron ore concentrate of blast furnace instructions for use grade, and shortcoming is that mine tailing magnetic separation productivity is relatively low, water content consumption is relatively big, production cost is higher and metal recovery rate is relatively low.
At present, falling behind due to domestic ore-dressing technique equipment and production controls the reasons such as improper, when adopting magnetic separation process ore dressing for the comprehensive mine tailing of iron ore, the response rate of metal is typically in less than 50%, it is impossible to make full use of the iron-containing resource in iron ore tailings.
Summary of the invention
It is an object of the invention to provide for the situation containing high intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing, flotation tailing in the comprehensive mine tailing of iron ore, according to the magnetic that the grade of high intensity magnetic separation mine tailing is higher relatively low genus Fe2O3, magnetic higher genus Fe that the grade of low intensity magnetic separation mine tailing is relatively low3O4, the granularity of flotation tailing is relatively thin, grade and SO2The relatively high magnetism that content is higher belongs to Fe3O4Feature, for fully reclaiming the technical scheme of iron-containing resource in iron ore mixing mine tailing.
For achieving the above object, the present invention provides following technical scheme:
The comprehensive mine tailing of natural moisture is after caking beater is broken up, the comprehensive mine tailing of powdery adopts Double helix magnetic separator to carry out dry type magnetic separation, the ferrous material that in the comprehensive mine tailing of powdery, magnetic is relatively low, grade is higher can be made to be easily separated with other mineral, obtain the high intensity magnetic separation mine tailing that magnetic is relatively low, high intensity magnetic separation mine tailing is then through roasting, ore grinding and magnetic separation, can obtaining the iron ore concentrate that grade is higher, the magnetic tailing obtained can utilize as construction material or packing material.
Preferably, the present invention is before adopting Double helix magnetic separator dry type magnetic separation to the comprehensive mine tailing of iron ore, for the present situation of each more difficult separation of mineral composition magnetic separation in caking mine tailing, caking beater is adopted to carry out efflorescence the comprehensive mine tailing of caking, the comprehensive mine tailing of powdery adopts Double helix magnetic separator to carry out dry type magnetic separation, can be effectively improved the separating effect of strongly magnetic mineral and weak magnetic mineral.
Preferably, the comprehensive mine tailing of iron ore that the present invention adopts, its Iron grade is 17～23%, SiO2 content is 44～55%, and raw meal particle size consists of-200 orders and accounts for more than 80%, belongs to the iron-containing resource that Iron grade is relatively low, silicone content is higher, granularity is thinner.
Compared with prior art, the invention has the beneficial effects as follows:
(1) adopt this method that the comprehensive mine tailing of iron ore is developed and utilized, be effectively reduced in iron ore tailings valuable metal content, improve the utilization rate of iron ore resource, reduce the production cost of iron ore concentrate.
(2) adopt this method that the comprehensive mine tailing of iron ore is developed and utilized, can effectively solve the present situation that China's iron ore abundant ore source ore resources short, lean is rich, effectively reduce the cost of steel products；
(3) adopt this method that the comprehensive mine tailing of iron ore is developed and utilized, reduce iron ore tailings discharge capacity.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention.
Detailed description of the invention
As it is shown in figure 1, the comprehensive dry tail ore dressing of a kind of iron ore throws the method except ferromagnetism mine tailing, the method carries out as steps described below:
Step 1: the selection of the comprehensive mine tailing of iron ore: the comprehensive mine tailing Main Ingredients and Appearance of iron ore of the present invention is: TFe:17～23%, SiO2: 44～55%, MgO:2～6%, AI2O3: 6～10%, in mine tailing water content less than 4%, agglomerated particle size is less than 100mm.
Step 2: breaing up of the comprehensive mine tailing that lumps: iron ore tailings joins rotor from the feeding mouth of caking beater, rotor drives at driving motor and rotates under the driving of power transmission shaft, block mine tailing flow to discharge end process from feeding end in rotor, material is constantly tossed and falls and carries out making contact with breaing up tooth, makes block mine tailing be broken up.
Step 3: the magnetic separation of the comprehensive mine tailing of powdery: granularity accounts for after the comprehensive mine tailing of 80% adds from Double helix magnetic separator feeding mouth less than-200 orders, at driving motor, power transmission shaft, under the driving of travelling gear, Double helix magnetic separator rotates, comprehensive mine tailing is in Double helix magnetic separator in process from feeding end helical feed to discharge end, along with serpentine pipe high speed rotating, weak magnetic mineral is thrown to lower floor, delivered to weak magnetic mineral discharging opening by lower spiral reverse direction to discharge, strongly magnetic mineral is adsorbed on the coil, rotate with serpentine pipe and be pushed to the discharge of strongly magnetic mineral discharging opening.
Step 4: the comprehensive dry tail ore dressing gained weak magnetic mineral of iron ore, i.e. high intensity magnetic separation mine tailing, fired, ore grinding and magnetic separation, can obtain Iron grade and be more than 54%, meet the iron ore concentrate sintering instructions for use.
The operation principle that iron ore of the present invention comprehensive mine tailing strongly magnetic mineral separates with weak magnetic mineral: water content less than 4%, the comprehensive mine tailing of iron ore of Iron grade 17～23% join rotor from the feeding mouth of caking beater, rotor drives at driving motor and rotates under the driving of power transmission shaft, block mine tailing flow to discharge end process from feeding end in rotor, material is constantly tossed and falls and carries out making contact with breaing up tooth, makes block mine tailing be broken up.When Flow of Goods and Materials to the caking discharge end of beater and granularity accounts for 80% less than-200 orders, the comprehensive mine tailing of powdery flows out into Double helix magnetic separator from the discharging opening of caking beater.After powdery mine tailing enters from Double helix magnetic separator feeding mouth, driving motor, power transmission shaft, travelling gear driving under Double helix magnetic tube rotate, comprehensive mine tailing is in Double helix magnetic separator in process from feeding end helical feed to discharge end, along with serpentine pipe high speed rotating, weak magnetic mineral is thrown to lower floor, delivered to weak magnetic mineral discharging opening by lower spiral reverse direction to discharge, strongly magnetic mineral is adsorbed on the coil, rotate with serpentine pipe and be pushed to the discharge of strongly magnetic mineral discharging opening, reached dry separation and thrown the purpose except ferromagnetism mine tailing.
Claims (2)
1. the comprehensive dry tail ore dressing of iron ore throws the method except ferromagnetism mine tailing, it is characterised in that: the method carries out as steps described below:
(1) preliminary election: thrown except relatively high magnetism, grade is relatively low, content of sulfur dioxide is high flotation tailing and low intensity magnetic separation mine tailing by dry separation, obtain comprehensive mine tailing；
(2) primary election: comprehensive mine tailing is after powdery after caking beater is broken up, Double helix magnetic separator is adopted to carry out dry type magnetic separation, in the comprehensive mine tailing of powdery, magnetic is more weak, grade is relatively low high intensity magnetic separation mine tailing, flotation tailing and low intensity magnetic separation mine tailing are easily separated, and respectively obtain that grade is higher, magnetic is more weak again roasting can sort the high intensity magnetic separation mine tailing of utilization and flotation tailing and low intensity magnetic separation mine tailing；
(3) selected: high intensity magnetic separation mine tailing, through reduction roasting, ore grinding and magnetic separation, can obtain the iron ore concentrate of Iron grade more than 54%.
2. the comprehensive dry tail ore dressing of a kind of iron ore as claimed in claim 1 throws the method except ferromagnetism mine tailing, it is characterised in that: iron ore mixing mine tailing composition used in the method is: TFe:17～23%, SiO2: 44～55%, MgO:2～6%, AI2O3: 6～10%, in mine tailing water content less than 4%, agglomerated particle size is less than 100mm.
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| CN201610150162.2A CN105797847B (en) | 2016-03-16 | 2016-03-16 | A kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing |
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| CN201610150162.2A CN105797847B (en) | 2016-03-16 | 2016-03-16 | A kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262276A (en) * | 2017-07-11 | 2017-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction magnetic iron ore throws useless technique |
| CN107309081A (en) * | 2017-07-11 | 2017-11-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of processing barren rocks iron selection technique |
| CN107365904A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycles technique |
| CN107365905A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Closed circuit shower furnace is calcined dry grinding dry separation craft to a kind of refractory iron ore online |
| CN108080142A (en) * | 2017-11-28 | 2018-05-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of shaft roasting ore deposit quality grading ore-dressing technique |
| CN110586315A (en) * | 2019-10-24 | 2019-12-20 | 武汉科技大学 | Full-dry type iron ore sorting method |
| RU2726808C1 (en) * | 2020-02-07 | 2020-07-15 | Геннадий Викторович Баловленков | Method of crushed stone production from iron ore beneficiation wastes |
| RU2813856C1 (en) * | 2023-07-18 | 2024-02-19 | Публичное акционерное общество "Северсталь" (ПАО "Северсталь") | Method for dry magnetic separation of tailings of weakly magnetic ores |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365904B (en) * | 2017-07-11 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycling technique |
| CN107309081A (en) * | 2017-07-11 | 2017-11-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of processing barren rocks iron selection technique |
| CN107365904A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycles technique |
| CN107365905A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Closed circuit shower furnace is calcined dry grinding dry separation craft to a kind of refractory iron ore online |
| CN107309081B (en) * | 2017-07-11 | 2018-10-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of processing barren rocks iron selection technique |
| CN107262276A (en) * | 2017-07-11 | 2017-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction magnetic iron ore throws useless technique |
| CN107365905B (en) * | 2017-07-11 | 2019-03-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore closed circuit shower furnace roasting dry grinding dry separation craft online |
| CN108080142A (en) * | 2017-11-28 | 2018-05-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of shaft roasting ore deposit quality grading ore-dressing technique |
| CN108080142B (en) * | 2017-11-28 | 2019-09-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of shaft roasting mine quality grading ore-dressing technique |
| CN110586315A (en) * | 2019-10-24 | 2019-12-20 | 武汉科技大学 | Full-dry type iron ore sorting method |
| CN110586315B (en) * | 2019-10-24 | 2021-04-23 | 武汉科技大学 | Full-dry type iron ore sorting method |
| RU2726808C1 (en) * | 2020-02-07 | 2020-07-15 | Геннадий Викторович Баловленков | Method of crushed stone production from iron ore beneficiation wastes |
| RU2813856C1 (en) * | 2023-07-18 | 2024-02-19 | Публичное акционерное общество "Северсталь" (ПАО "Северсталь") | Method for dry magnetic separation of tailings of weakly magnetic ores |
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