CN112892848A - Ore dressing process for bayan obo high-fluorine high-phosphorus complex ore - Google Patents
Ore dressing process for bayan obo high-fluorine high-phosphorus complex ore Download PDFInfo
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- CN112892848A CN112892848A CN202110050605.1A CN202110050605A CN112892848A CN 112892848 A CN112892848 A CN 112892848A CN 202110050605 A CN202110050605 A CN 202110050605A CN 112892848 A CN112892848 A CN 112892848A
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- concentrate
- tailings
- ore
- fluorine
- weak magnetic
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- 239000011737 fluorine Substances 0.000 title claims abstract description 40
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 40
- 239000011574 phosphorus Substances 0.000 title claims abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000012141 concentrate Substances 0.000 claims abstract description 88
- 229910052742 iron Inorganic materials 0.000 claims abstract description 46
- 238000005188 flotation Methods 0.000 claims abstract description 27
- 239000010419 fine particle Substances 0.000 claims abstract description 26
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000498 ball milling Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000010436 fluorite Substances 0.000 claims abstract description 6
- 238000006115 defluorination reaction Methods 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 4
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 14
- 239000011707 mineral Substances 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a mineral separation process of a bayan obo high-fluorine and high-phosphorus complex ore, which comprises the following steps: s1, classifying the raw materials after two-stage closed-circuit ball milling to obtain primary fine particles; s2, carrying out primary coarse-fine and fine weak magnetic separation on the primary fine particles to obtain weak magnetic concentrate and weak magnetic tailings, and conveying the weak magnetic tailings to downstream for comprehensive recovery of rare earth and fluorite; s3, carrying out secondary ball milling and grading on the weak magnetic concentrate to obtain a secondary fine particle product; s4, carrying out desliming operation on the secondary fine particle products to obtain desliming concentrate and desliming tailings; s5, elutriating and sorting the deslimed concentrate to obtain elutriated concentrate and elutriated tailings; s6, performing iron reverse flotation defluorination operation on the elutriated concentrate to obtain iron reverse flotation concentrate and iron reverse flotation tailings, and discharging the reverse flotation tailings, the deslimed tailings and the elutriated tailings. The invention aims to provide a mineral separation process for a bayan obo high-fluorine complex ore (high phosphorus), which can reduce the fluorine content of concentrate, improve the grade and yield of the concentrate and reduce the production cost.
Description
Technical Field
The invention relates to the field of efficient utilization of mine resources, in particular to a mineral separation process for bayan obo high-fluorine and high-phosphorus complex ores.
Background
The Baiyunebo ore is a complex refractory polymetallic ore which is recognized in the world, and is also an important raw material base for steel cladding and even China. Along with the continuation of the mining surface of the dolomite ore, the specific gravity of the fluorite type high-magnetism iron ore is larger and larger, while the traditional ore dressing process of the dolomite obo ore can reduce the fluorine to be below 0.5 percent, the whole process has high medicament unit consumption and low recovery rate, the cost of the iron ore concentrate is greatly increased, and the influence on downstream products is larger. Therefore, it is very important to find a low-cost ore dressing process for the bayan obo fluorite type high-magnetic ore.
Disclosure of Invention
The invention aims to provide a mineral separation process for bayan obo high-fluorine and high-phosphorus complex ores, which can reduce the fluorine content of iron ore concentrates, improve the yield of the iron ore concentrates and reduce the cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a mineral separation process of bayan obo high-fluorine and high-phosphorus complex ore, which comprises the following steps: s1, classifying the raw materials after two-stage closed-circuit ball milling to obtain primary fine particles; wherein the total iron grade of the raw material is more than 27 percent, the ferrous grade is more than 10 percent, the fluorine grade is more than 8 percent, and the granularity range of primary fine particles is-200 meshes and is 86-92 percent;
s2, carrying out primary coarse-fine and fine weak magnetic separation on the primary fine particles to obtain weak magnetic concentrate and weak magnetic tailings, and conveying the weak magnetic tailings to downstream for comprehensive recovery of rare earth and fluorite;
s3, carrying out secondary ball milling and grading on the weak magnetic concentrate to obtain a secondary fine particle product;
s4, carrying out desliming operation on the secondary fine particle products to obtain desliming concentrate and desliming tailings;
s5, elutriating and sorting the deslimed concentrate to obtain elutriated concentrate and elutriated tailings;
s6, performing iron reverse flotation defluorination operation on the elutriated concentrate to obtain iron reverse flotation concentrate and iron reverse flotation tailings, and discharging the reverse flotation tailings, the deslimed tailings and the elutriated tailings.
Furthermore, the grade of the weak magnetic concentrate is 50-56%.
Further, the secondary fine particle product has a particle size ranging from-200 mesh to 95-98%.
Furthermore, the concentration of desliming feeding ore is controlled between 25 and 40 percent.
Further, the concentration of desliming feeding ore is controlled between 30 percent and 35 percent.
Further, the inhibitor used in the reverse iron flotation is water glass, and the collecting agent is one or more of GE28, GQ601, TD-V and BF-DW.
Furthermore, the fluorine content of the final iron ore concentrate is less than or equal to 0.42 percent.
Further, the concentration of the elutriation feeding ore is controlled to be 35-45%.
Further, the elutriation concentrate is controlled to be 62-65%.
Compared with the prior art, the invention has the beneficial technical effects that:
the recovery rate of the iron ore concentrate of the bayan obo high-fluorine and high-phosphorus complex ore in the whole process can be improved by 1.0-2.5%, the unit consumption of the inhibitor medicament is basically unchanged, the unit consumption of the collector medicament is reduced by 0.25-0.40 kg/ton ore concentrate, the unit consumption of steam is reduced by 0.150-0.230 Jijiao/ton ore concentrate, and the cost of downstream steel products is reduced.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a flow chart of the ore dressing process of the bayan obo high-fluorine and high-phosphorus complex ore.
Detailed Description
As shown in figure 1, a mineral processing technology of bayan obo high-fluorine complex ore (high phosphorus) comprises the following steps
S1, classifying the raw materials after two-stage closed-circuit ball milling to obtain primary fine particles;
s2, carrying out primary coarse-fine and fine weak magnetic separation on the primary fine particles to obtain weak magnetic concentrate and weak magnetic tailings, and conveying the weak magnetic tailings to downstream for comprehensive recovery of rare earth and fluorite;
s3, carrying out secondary ball milling and grading on the weak magnetic concentrate to obtain a secondary fine particle product;
s4, carrying out desliming operation on the secondary fine particle products to obtain desliming concentrate and desliming tailings;
s5, elutriating and sorting the deslimed concentrate to obtain elutriated concentrate and elutriated tailings;
s6, performing iron reverse flotation defluorination operation on the elutriated concentrate to obtain iron reverse flotation concentrate and iron reverse flotation tailings, and discharging the reverse flotation tailings, the deslimed tailings and the elutriated tailings.
The total iron grade of the raw materials is more than 27%, the ferrous grade is more than 10%, and the fluorine content is more than 8%; the particle size range of the primary fine particles is-200 meshes and is 86-92 percent; the grade of the weak magnetic concentrate is between 50 and 56 percent of that of the weak magnetic concentrate; the weak magnetic tailings are sent to downstream for comprehensive recovery; the particle size range of the secondary fine particle product is-200 meshes and is 95-98%; the concentration of the desliming ore feeding is controlled between 25 and 40 percent; the concentration of the elutriation feeding ore is controlled to be 35-45%, and the concentration of the elutriation concentrate is controlled to be 62-65%; the inhibitor used in the reverse iron flotation is water glass, and the collecting agent is one or more of GE28, GQ601, TD-V and BF-DW; the fluorine content of the final iron ore concentrate is less than or equal to 0.42 percent.
Example 1
The raw materials with the total iron grade of 29.2 percent, the ferrous iron of 10.8 percent and the fluorine content of 8.9 percent are graded after two-stage closed-circuit ball milling to obtain primary fine particle minerals with the grain size of-200 meshes accounting for 87 percent, and the minerals are subjected to primary coarse and primary fine weak magnetic separation to obtain weak magnetic concentrates with the grade of 52.8 percent. Carrying out desliming operation after the weakly magnetic concentrate is ball-milled to-200 meshes and accounts for 96 percent to obtain desliming concentrate with the grade of 59.2 percent; then carrying out elutriation operation on the deslimed concentrate to obtain elutriated concentrate with the grade of 64.5% and the fluorine content of 0.76%; and (3) subjecting the elutriated concentrate to iron reverse flotation operation, and adopting BF-DW as a collecting agent to obtain the iron reverse flotation concentrate with the grade of 66.5% and the fluorine content of 0.29%. In the process, the recovery rate of the iron ore concentrate is improved to 70.3% from 69.1% of the original process, the unit consumption of the collecting agent is reduced to 1.15 kg/ton of the original 1.46 kg/ton of the iron ore concentrate, and the unit consumption of steam is reduced to 0.285 gcoke/ton of the original 0.46 gcoke/ton of the iron ore concentrate.
Example 2
The raw materials with the total iron grade of 31.4 percent, the ferrous iron of 11.5 percent and the fluorine content of 10.3 percent are graded after two-stage closed-circuit ball milling to obtain primary fine particle minerals with the grain size of-200 meshes accounting for 91 percent, and the minerals are subjected to primary coarse and primary fine weak magnetic separation to obtain weak magnetic concentrates with the grade of 54.5 percent. Ball-milling the weakly magnetic concentrate until the concentration of-200 meshes accounts for 95%, and then performing desliming operation to obtain desliming concentrate with the grade of 61.5%; then carrying out elutriation operation on the deslimed concentrate to obtain elutriated concentrate with the grade of 65.0% and the fluorine content of 0.69%; and (3) subjecting the elutriated concentrate to iron reverse flotation operation, and obtaining iron reverse flotation concentrate with the grade of 67.1% and the fluorine content of 0.40% by using GQ-601 as a collecting agent. In the process, the recovery rate of the iron ore concentrate is improved to 71.9 percent from 69.8 percent of the original process, the unit consumption of the collecting agent is reduced to 1.02 kg/ton of the original ore concentrate from 1.34 kg/ton of the original ore concentrate, and the unit consumption of the steam is reduced to 0.265 gcoke/ton of the original ore concentrate from 0.43 gcoke/ton of the original ore concentrate.
Example 3
The raw materials with the total iron grade of 28.1 percent, the ferrous iron of 10.3 percent and the fluorine content of 9.2 percent are graded after two-stage closed-circuit ball milling to obtain primary fine particle minerals with the grain size of-200 meshes accounting for 90 percent, and the minerals are subjected to primary coarse and primary fine weak magnetic separation to obtain weak magnetic concentrates with the grade of 52.9 percent. Ball-milling the weakly magnetic concentrate until the concentration is-200 meshes and the concentration accounts for 95%, and then carrying out desliming operation to obtain desliming concentrate with the grade of 60.1%; then carrying out elutriation operation on the deslimed concentrate to obtain elutriated concentrate with the grade of 63.8% and the fluorine content of 0.57%; and (3) subjecting the elutriated concentrate to iron reverse flotation operation, and adopting BF-DW as a collecting agent to obtain the iron reverse flotation concentrate with the grade of 66.1% and the fluorine content of 0.36%. In the process, the recovery rate of the iron ore concentrate is improved to 70.3% from 68.2% of the original process, the unit consumption of the collecting agent is reduced to 1.12 kg/ton of the original 1.43 kg/ton of the original ore concentrate, and the unit consumption of steam is reduced to 0.295 gJo/ton of the original 0.49 gJo/ton of the original ore concentrate.
Example 4
The raw materials with the total iron grade of 29.3 percent, the ferrous iron of 10.5 percent and the fluorine content of 8.1 percent are graded after two-stage closed-circuit ball milling to obtain primary fine particle minerals with the grain size of-200 meshes accounting for 89 percent, and the minerals are subjected to primary coarse and primary fine weak magnetic separation to obtain weak magnetic concentrates with the grade of 54.6 percent. Carrying out desliming operation after the weakly magnetic concentrate is ball-milled to-200 meshes and accounts for 96 percent to obtain desliming concentrate with the grade of 58.9 percent; then carrying out elutriation operation on the deslimed concentrate to obtain elutriated concentrate with the grade of 64.5% and the fluorine content of 0.51%; and (3) subjecting the elutriated concentrate to iron reverse flotation operation, and obtaining the iron reverse flotation concentrate with the grade of 66.6% and the fluorine content of 0.29% by adopting GQ-601 as a collecting agent. In the process, the recovery rate of the iron ore concentrate is improved to 73.1% from 70.7% of the original process, the unit consumption of the collecting agent is reduced to 0.99 kg/ton of the original 1.37 kg/ton of the iron ore concentrate, and the unit consumption of steam is reduced to 0.201 gJo/ton of the original 0.421 gJo/ton of the iron ore concentrate.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. The ore dressing process of the bayan obo high-fluorine high-phosphorus complex ore is characterized by comprising the following steps of:
s1, classifying the raw materials after two-stage closed-circuit ball milling to obtain primary fine particles; wherein the total iron grade of the raw material is more than 27 percent, the ferrous grade is more than 10 percent, the fluorine grade is more than 8 percent, and the granularity range of primary fine particles is-200 meshes and is 86-92 percent;
s2, carrying out primary coarse-fine and fine weak magnetic separation on the primary fine particles to obtain weak magnetic concentrate and weak magnetic tailings, and conveying the weak magnetic tailings to downstream for comprehensive recovery of rare earth and fluorite;
s3, carrying out secondary ball milling and grading on the weak magnetic concentrate to obtain a secondary fine particle product;
s4, carrying out desliming operation on the secondary fine particle products to obtain desliming concentrate and desliming tailings;
s5, elutriating and sorting the deslimed concentrate to obtain elutriated concentrate and elutriated tailings;
s6, performing iron reverse flotation defluorination operation on the elutriated concentrate to obtain iron reverse flotation concentrate and iron reverse flotation tailings, and discharging the reverse flotation tailings, the deslimed tailings and the elutriated tailings.
2. The ore dressing process of the bayan obo high-fluorine high-phosphorus complex ore according to claim 1, characterized in that the grade of the weak magnetic concentrate is 50-56%.
3. The process for beneficiation of bayan obo high-fluorine high-phosphorus complex ore according to claim 1, wherein the particle size range of the secondary fine particle product is-200 mesh and 95-98%.
4. The process for ore dressing of bayan obo high-fluorine high-phosphorus complex ore according to claim 1, wherein the concentration of desliming feeding ore is controlled between 25-40%.
5. The ore dressing process of the bayan obo high-fluorine high-phosphorus complex ore according to claim 4, wherein the concentration of desliming feeding ore is controlled between 30 and 35 percent.
6. The bayan obo high-fluorine high-phosphorus complex ore dressing process according to claim 1, characterized in that an inhibitor used for iron reverse flotation is water glass, and a collecting agent is one or more of GE28, GQ601, TD-V and BF-DW.
7. The ore dressing process of the bayan obo high-fluorine high-phosphorus complex ore according to claim 1, wherein the fluorine content of the final iron ore concentrate is less than or equal to 0.42%.
8. The process for ore dressing of bayan obo high-fluorine high-phosphorus complex ore according to claim 1, wherein the concentration of elutriation feeding ore is controlled between 35-45%.
9. The process for beneficiation of bayan obo high-fluorine high-phosphorus complex ore according to claim 1, wherein elutriation concentrate is controlled between 62% and 65%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643126A (en) * | 2022-03-17 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Magnetic-gravity-flotation combined iron separation process |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643126A (en) * | 2022-03-17 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Magnetic-gravity-flotation combined iron separation process |
| CN114643126B (en) * | 2022-03-17 | 2023-11-28 | 包头钢铁（集团）有限责任公司 | Magnetic gravity floatation combined iron separation process |
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