CN105689126B - A kind of oolitic hematite ore-dressing technique - Google Patents
A kind of oolitic hematite ore-dressing technique Download PDFInfo
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- CN105689126B CN105689126B CN201610138658.8A CN201610138658A CN105689126B CN 105689126 B CN105689126 B CN 105689126B CN 201610138658 A CN201610138658 A CN 201610138658A CN 105689126 B CN105689126 B CN 105689126B
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- ore
- iron
- magnetic separator
- rough concentrate
- concentrate
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Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052595 hematite Inorganic materials 0.000 title claims abstract description 12
- 239000011019 hematite Substances 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 134
- 229910052742 iron Inorganic materials 0.000 claims abstract description 67
- 239000012141 concentrate Substances 0.000 claims abstract description 59
- 239000006148 magnetic separator Substances 0.000 claims abstract description 59
- 238000007885 magnetic separation Methods 0.000 claims abstract description 25
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 239000000567 combustion gas Substances 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims description 7
- 239000013067 intermediate product Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000003814 drug Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 235000019580 granularity Nutrition 0.000 abstract 3
- 238000011084 recovery Methods 0.000 description 19
- 238000005188 flotation Methods 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000005345 coagulation Methods 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005456 ore beneficiation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of oolitic hematite ore-dressing technique, it comprises the following steps：Raw ore is broken into below 5mm granularities in disintegrating machine, is then calcined in 500~550 DEG C of combustion gas rotary kilns at least 1 hour；Ore grinding to the following contents of granularity 0.074mm are carried out again and account for 34%, are then carried out low intensity magnetic separation using wet magnetic separator, are magneticly elected iron rough concentrate 1 and mine tailing 1；Iron rough concentrate 1 is sieved into vibratory sieve, on the vibrating face for qualified iron ore concentrate 1, column magnetic separator is selected first for the entrance below vibratory sieve；Choose iron rough concentrate 2 and mine tailing 2；Iron rough concentrate 2 is regrinded to the following contents of granularity 0.074mm and accounts for 75%, second of column magnetic separator of progress is selected, chooses iron rough concentrate 3 and chats 1；It is selected that iron rough concentrate 3 is subjected to third time column magnetic separator, chooses iron ore concentrate 2 and chats 2.Present invention process is simple, cost is low, because that need not add any medicament, so environmental protection, recycling water utilization rate height.
Description
Technical field
The invention belongs to technical field of beneficiation, is related to a kind of oolitic hematite ore-dressing technique.
Background technology
Existing rhombohedral iron ore beneficiation technics such as Jingtieshan Iron Mine stone uses lump ore calcining magnetic separation（150~15mm grades）, powder
Ore strong magnetic selects（15~0mm grades）Technique handled.Lump ore roasting apparatus is 100m3The roasting of Anshan type reduction magnetization is perpendicular
Stove, 650 DEG C -700 DEG C of sintering temperature, roasting flow are closed circuit magnetizing roast；Grinding process is three sections of stage grindings, mog
For granularity 93.81% is accounted in below 0.045mm；Sorting process is the rough concentrate after four magnetic separation to Flowsheet of cationic indirect flotation,
The concentrate of the 4th magnetic separation is introduced and regrinds reverse flotation system.Regrinding forms ore grinding point by ball mill and hydrocyclone
Level loop, flotation flowsheet are one roughing, primary cleaning, scan reverse flotation flowsheet four times.In flotation to ore deposit grade 55.76%
Under the conditions of, concentrate grade 60.61%, SiO2Content 5.76%, tailings grade 24.16%, flotation operation iron recovery 94.23%.Should
Mill selects technique mog carefully to cause ore grinding cost height, Beneficiation flowsheet length to cause beneficiation cost height.Reverse flotation work needs to add
Floating agent, caused waste water can not be recycled, and Sewage treatment utilization rate is low.
The content of the invention
The purpose of the present invention is exactly to solve the above-mentioned problems in the prior art, there is provided a kind of technique is simple, cost is low,
Any medicament need not be added, environmental protection, the high oolitic hematite ore-dressing technique of recycling water utilization rate.
To achieve the above object, technical solution of the invention is：A kind of oolitic hematite ore-dressing technique, it include with
Lower step：(1) raw ore is broken into below 5mm granularity in disintegrating machine, the ore after crushing roasts in combustion gas rotary kiln
Burn at least 1 hour, sintering temperature is 500~550 DEG C；(2) the ore progress ore grinding after roasting to below granularity 0.074mm is contained
Amount accounts for 34%, then carries out low intensity magnetic separation using wet magnetic separator, magneticly elects iron rough concentrate 1 and mine tailing 1；(3) iron magneticly elected is coarse-fine
Ore deposit 1 is sieved into vibratory sieve, and Vibration Screen screen distance is in 0.7mm~1mm；The product in face is qualified iron essence on the vibrating
Ore deposit 1, it is selected that the intermediate products below vibratory sieve enter column magnetic separator first；(4) column magnetic separator chooses iron rough concentrate 2 and mine tailing 2；
The iron rough concentrate 2 that column magnetic separator is chosen to be regrinded to the following contents of granularity 0.074mm and accounts for 75%, second of column magnetic separator of progress is selected,
Choose iron rough concentrate 3 and chats 1；The progress third time column magnetic separator of iron rough concentrate 3 that (5) second of column magnetic separator are chosen is selected,
Choose qualified iron ore concentrate 2 and chats 2.
By chats 1 described above and chats it is 2-in-1 and after return to wet magnetic separator and continue low intensity magnetic separation.
Wet magnetic separator low intensity magnetic separation magnetic field intensity described above is 120kA/m.
(1) present invention uses combustion gas rotary kiln, in low temperature（500℃-550℃）Under the conditions of oolitic hematite is magnetized
Roasting.Iron ore magnetic efficiency is good after roasting, and roasting condition is wider, simple to operate, live strong adaptability, is adapted to extensive work
Industry produces.(2) present invention uses vibratory sieve and column magnetic separator equipment, for bloodstone roasted ore magnetic separation cleaning technological flowasheet, experiment effect
Fruit is excellent.Using the characteristics of roasted ore coercivity is strong, easy magnetic coagulation, roughly grinding（Content of the granularity in below 0.074mm accounts for 34%）
Under the conditions of, using wet magnetic separator roughing（Magnetic field intensity is 120kA/m）, magnetic iron ore will formation " magnetic group during sorting
It is poly- ", microfine monomer magnetite ore particles can be so caught, avoids magnetic iron ore thin mud from losing, ensures the rate of recovery in roughing.It is right
Rough concentrate is selected using vibratory sieve, and closed circuit difference is classified with traditional ball mill-vibratory sieve, and used by oscillating screen is made in sorting herein
Industry, vibratory sieve use large aperture（0.7mm~1mm）Screen cloth, " magnetic coagulation " formed by fine fraction magnetic iron ore are isolated on sieve,
Form qualified iron ore concentrate 1, magnetic weaker intergrowth and gangue mineral（Less than 0.7mm）Ground as undersize into second segment
Ore deposit operation, the qualified iron ore concentrate of yield 32~42% or so can be obtained in advance, under only the intermediate products of yield 11~14% enter
One section is regrinded selected operation, is considerably reduced mill and is hanked this；It is selected using column magnetic separator to regrind selected operation, column magnetic separator can be fully
Disperse remaining " magnetic coagulation " to eliminate the monomer gangue and the lean intergrowth of magnetic iron ore and gangue that are entrained in magnetic coagulation, gram
The phenomenon that the magnetic separation process choosing caused by magnetic coagulation reduces is taken, plays selected effect.
In a word, present invention process is simple, cost is low；The mine-supplying quantity of second segment grinding-concentration operation is few, and mill is greatly lowered
Ore deposit, beneficiation cost, second segment grinding-concentration operating cost can reduce by 50% or so；Sieve magnetic separation process and magnetic separation-reverse floatation process
Compare, it is not necessary to add any medicament, belong to process for cleanly preparing；Because any medicament need not be added, so recycling water utilization rate is high.
Brief description of the drawings
Fig. 1 is the production technology figure of the present invention.
Embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1, as shown in figure 1, the present embodiment comprises the following steps：(1) raw ore is broken into disintegrating machine 5mm with
Under granularity, will it is broken after ore be calcined 1 hour in combustion gas rotary kiln, sintering temperature is 500 DEG C.(2) by after roasting
Ore carries out ore grinding to the following contents of granularity 0.074mm and accounts for 34%, then carries out low intensity magnetic separation using wet magnetic separator, and magnetic separation is tapped a blast furnace
Rough concentrate 1 and mine tailing 1.It is further preferred that described wet magnetic separator low intensity magnetic separation magnetic field intensity is 120kA/m.(3) magneticly elect
Iron rough concentrate 1 carry out screening sorting into vibratory sieve, Vibration Screen screen distance is in 0.7mm；The product in face is on the vibrating
Qualified iron ore concentrate 1, the intermediate products below vibratory sieve are selected into column magnetic separator first, and the flushing water speed of column magnetic separator is
80ml/s.(4) column magnetic separator chooses iron rough concentrate 2 and mine tailing 2；The iron rough concentrate 2 that column magnetic separator is chosen is regrinded to granularity
Below 0.074mm contents account for 75%, and second of column magnetic separator of progress is selected, and the flushing water speed of column magnetic separator is 160ml/s, is chosen
Iron rough concentrate 3 and chats 1；The progress third time column magnetic separator of iron rough concentrate 3 that (5) second of column magnetic separator are chosen is selected, chooses
Qualified iron ore concentrate 2 and chats 2.The qualified yield 34.20% of iron ore concentrate 1, TFe grades 62.65%, the rate of recovery 48.60%；Qualified iron essence
The yield 24.93% of ore deposit 2, TFe grades 61.33%, the rate of recovery 34.68%；Chats 1 and chats it is 2-in-1 and after chats yield 12.64%,
TFe grades 34.70%, the rate of recovery 9.95%；The yield 23.08% of mine tailing 1, TFe grades 10.26%, the rate of recovery 5.37%；The yield of mine tailing 2
5.15%th, TFe grades 11.99%, the rate of recovery 5.37%.To 100 tons of hematites, cost reduces by 51%.It is further preferred that by institute
The chats 1 and chats stated it is 2-in-1 and after return to wet magnetic separator and continue low intensity magnetic separation.
Embodiment 2, as shown in figure 1, the present embodiment comprises the following steps：(1) raw ore is broken into disintegrating machine 5mm with
Under granularity, will it is broken after ore be calcined in combustion gas rotary kiln at least 1 hour, sintering temperature is 530 DEG C.(2) will roasting
Ore afterwards carries out ore grinding to the following contents of granularity 0.074mm and accounts for 34%, then carries out low intensity magnetic separation, magnetic separation using wet magnetic separator
Go out iron rough concentrate 1 and mine tailing 1.It is further preferred that described wet magnetic separator low intensity magnetic separation magnetic field intensity is 120kA/m.(3) magnetic
The iron rough concentrate 1 selected carries out screening sorting into vibratory sieve, and Vibration Screen screen distance is in 0.8mm；The production in face on the vibrating
Product are qualified iron ore concentrate 1, and the intermediate products below vibratory sieve are selected into column magnetic separator first, and the flushing water speed of column magnetic separator is
80ml/s.(4) column magnetic separator chooses iron rough concentrate 2 and mine tailing 2；The rough concentrate 2 that column magnetic separator is chosen is regrinded to granularity
Below 0.074mm contents account for 75%, and second of column magnetic separator of progress is selected, and the flushing water speed of column magnetic separator is 160ml/s, is chosen
Iron rough concentrate 3 and chats 1.The progress third time column magnetic separator of iron rough concentrate 3 that (5) second of column magnetic separator are chosen is selected, chooses
Qualified iron ore concentrate 2 and chats 2.The yield 42.39% of iron ore concentrate 1, TFe grades 62.59%, the rate of recovery 59.36%；The yield of iron ore concentrate 2
15.87%th, TFe grades 61.16%, the rate of recovery 21.71%；Chats 1 and chats it is 2-in-1 and after chats yield 10.89%, TFe grades
37.94%th, the rate of recovery 9.24%；The yield 25.35% of mine tailing 1, TFe grades 13.37%, the rate of recovery 7.58%；The yield 5.49% of mine tailing 2,
TFe grades 17.17%, the rate of recovery 2.11%；Roasted product yield 100%, TFe grades 44.71%, the rate of recovery 100%.It is red to 100 tons
Iron ore, cost reduce by 64%.It is further preferred that by described chats 1 and chats it is 2-in-1 and after return to wet magnetic separator after
It is continuous to carry out low intensity magnetic separation.
Embodiment 3, as shown in figure 1, the present embodiment comprises the following steps：(1) raw ore is broken into disintegrating machine 5mm with
Under granularity, will it is broken after ore be calcined in combustion gas rotary kiln at least 1 hour, sintering temperature is 550 DEG C.(2) will roasting
Ore afterwards carries out ore grinding to the following contents of granularity 0.074mm and accounts for 34%, then carries out low intensity magnetic separation, magnetic separation using wet magnetic separator
Go out iron rough concentrate 1 and mine tailing 1.Described wet magnetic separator low intensity magnetic separation magnetic field intensity is 120kA/m.(3) iron magneticly elected is coarse-fine
Ore deposit 1 is sieved into vibratory sieve, and Vibration Screen screen distance is in 1mm；The product in face is qualified iron ore concentrate 1 on the vibrating,
Intermediate products below vibratory sieve are selected into column magnetic separator first, and the flushing water speed of column magnetic separator is 80ml/s.(4) column magnetic separator essence
Select iron rough concentrate 2 and mine tailing 2；The iron rough concentrate 2 that column magnetic separator is chosen is regrinded to the following contents of granularity 0.074mm and accounts for 75%,
Carry out that second of column magnetic separator is selected, the flushing water speed of column magnetic separator is 160ml/s, chooses iron rough concentrate 3 and chats 1.(5)
The progress third time column magnetic separator of iron rough concentrate 3 that secondary column magnetic separator is chosen is selected, chooses qualified iron ore concentrate 2 and chats 2.It is qualified
The yield 32.32% of iron ore concentrate 1, TFe grades 62.61%, the rate of recovery 44.84%；The qualified yield 26.64% of iron ore concentrate 2, TFe grades
61.32%th, the rate of recovery 36.19%；Chats yield 14.04%, TFe grades 34.49%, the rate of recovery 10.73%；The yield of mine tailing 1
24.14%th, TFe grades 14.03%, the rate of recovery 7.50%；The yield 2.86% of mine tailing 2, TFe grades 11.65%, the rate of recovery 0.74%；Roasting
Burn product yield 100%, TFe grades 45.13%, the rate of recovery 100%.To 100 tons of hematites, cost reduces by 46%.It is further excellent
Selection of land, by described chats 1 and chats it is 2-in-1 and after return to wet magnetic separator and continue low intensity magnetic separation.
Embodiment described above is only that is made within the spirit and principles of the invention is any preferably with example shape
Modification, equivalent substitution, improvement etc., it is all in the protection domain of this patent.
Claims (5)
- A kind of 1. oolitic hematite ore-dressing technique, it is characterised in that：It comprises the following steps：(1) raw ore is broken in disintegrating machine Be broken into below 5mm granularity, will it is broken after ore be calcined in combustion gas rotary kiln at least 1 hour, sintering temperature is 500~ 550℃；(2) ore after roasting is subjected to ore grinding to the following contents of granularity 0.074mm and accounts for 34%, then using wet magnetic separator Low intensity magnetic separation is carried out, magneticly elects iron rough concentrate 1 and mine tailing 1；(3) iron rough concentrate 1 magneticly elected is sieved into vibratory sieve, is vibrated Mesh size is sieved in 0.7mm~1mm；The product in face is qualified iron ore concentrate 1 on the vibrating, the intermediate products below vibratory sieve It is selected into column magnetic separator first；(4) column magnetic separator chooses iron rough concentrate 2 and mine tailing 2；The iron rough concentrate 2 that column magnetic separator is chosen Regrind to the following contents of granularity 0.074mm and account for 75%, second of column magnetic separator of progress is selected, chooses iron rough concentrate 3 and chats 1； The progress third time column magnetic separator of iron rough concentrate 3 that (5) second of column magnetic separator are chosen is selected, chooses qualified iron ore concentrate 2 and chats 2。
- 2. oolitic hematite ore-dressing technique according to claim 1, it is characterised in that：Described chats 1 and chats is 2-in-1 Wet magnetic separator is returned to after and and continues low intensity magnetic separation.
- 3. oolitic hematite ore-dressing technique according to claim 1 or 2, it is characterised in that：Described wet magnetic separator is weak Magnetic separation magnetic field intensity is 120kA/m.
- 4. oolitic hematite ore-dressing technique according to claim 1 or 2, it is characterised in that：Iron rough concentrate 1 is used into vibratory sieve Screening is not intended to simply be classified, but used by oscillating screen is obtained into qualified iron essence under the conditions of coarsely graded in separation operation Ore deposit 1.
- 5. oolitic hematite ore-dressing technique according to claim 3, it is characterised in that：Iron rough concentrate 1 is used into Vibration Screen Divide and be not intended to simply be classified, but used by oscillating screen is obtained into qualified iron ore concentrate in separation operation under the conditions of coarsely graded 1。
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| CN201610138658.8A CN105689126B (en) | 2016-05-11 | 2016-05-11 | A kind of oolitic hematite ore-dressing technique |
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| CN105689126B true CN105689126B (en) | 2018-01-09 |
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| CN107377205B (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 iron ore suspension roasting magnetic separation flotation tailing it is circulating it is non-topple over utilize technique |
| CN109317289A (en) * | 2018-11-14 | 2019-02-12 | 王光领 | Dry sand medium preparation process is used on air dry sand Recognition Applied in Coal Preparation System |
| CN115055276A (en) * | 2022-06-09 | 2022-09-16 | 赣州金环磁选科技装备股份有限公司 | Technological process for physical separation of oolitic hematite |
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| CN105689126A (en) | 2016-06-22 |
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