CN109847923B - Recovery process of extremely-poor weathered primary ilmenite - Google Patents
Recovery process of extremely-poor weathered primary ilmenite Download PDFInfo
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Abstract
The invention discloses a recovery process of extremely-poor weathered primary ilmenite, and provides a newly-developed efficient, green and low-cost ilmenite recovery process which specifically comprises three steps of pretreatment, pre-enrichment and efficient separation. The pretreatment is to crush the ore to a proper size fraction, and then carry out wet-type tailing discarding by adopting a gravity magnetic separator to obtain tailing discarding concentrate and tailing discarding; the pre-enrichment is to finely grind the tailings discarding concentrate, and then adopt a spiral chute to enrich to obtain spiral concentrate and spiral tailings; the high-efficiency separation is to dry the spiral concentrate and then separate the spiral concentrate by adopting a combined iron-titanium separator to obtain iron concentrate, titanium concentrate and titanium tailings. The invention has the beneficial effects that: the water consumption of unit ore processing is very little, and the method is particularly suitable for drought and water-deficient areas; no mineral dressing agent is added, so that the environment-friendly effect is achieved; the process flow is simple and efficient, the production cost is low, and the method conforms to the green low-carbon cycle development policy advocated by the state.
Description
Technical field
The invention belongs to ilmenite ore ore dressing fields, and in particular to a kind of recycling work of extreme poverty weathering Primary ilmenite
Skill.
Background technique
The relatively thick extreme poverty weathering Primary ilmenite of cloth embedding for granularity, since ore weathering is serious, clay content is larger,
TiO2 grade is extremely low, and gangue content is especially big, and clay mineral is serious, using traditional strong magnetic+floatation process or strong magnetic+gravity treatment work
Even if the ilmenite concentrate product of the available qualification of skill, but the rate of recovery is also very low, and ore is unable to get economic utilization.
Ore belongs to extreme poverty weathering Primary ilmenite, belongs to the dull mine not by industrial utilization.Prior art all cannot be
Under conditions of economy, raw ore is subjected to desliming, throws tail, is enriched to TiO2The ilmenite crude product of 30% or more grade.
Summary of the invention
For above-mentioned development and utilization problem, the present invention is intended to provide a kind of recovery process of extreme poverty weathering Primary ilmenite,
Include the following steps:
1) pre-treatment: tcrude ore is crushed, and is then fed ZCLA weight magnetic and is drawn ore separators, carries out wet type and throw tail, obtain throwing tail
Concentrate and throwing tail tailing；
2) preenrichment: tail fine grinding will be thrown subsequently into spiral chute and obtain spiral concentrate and spiral tailing；
3) it efficiently separates: isolated subsequently into joint ferrotitanium separator by the concentration of spiral concentrate, filters pressing and drying
Iron ore concentrate, ilmenite concentrate and dry separation tailing.
Preferably, step 1) the broken grade is 5-100mm.
Preferably, it is 4000-10000Gs that step 1) the ZCLA weight magnetic, which draws the background magnetic field intensity of ore separators,.
Preferably, fine mill size described in step 2) is that -0.074mm accounts for throwing tail concentrate 32%-60%.
Preferably, step 2) the spiral chute sorting is closed circuit flow, includes 1 section of roughing, and 1-2 sections are scanned, 2-5 sections of essences
Choosing.
Preferably, each section of the spiral chute ore pulp mass concentration sorted in step 2): roughing section is 20%-25%, selected
Section is 25%-35%, and scanning section is 10%-15%.
Preferably, spiral chute roughing section and selected section in step 2) add the transverse direction perpendicular to flow of slurry tangential direction
Flushing water, roughing section is added at 2-3, at selected section of addition 1-2.
Preferably, step 3) the joint ferrotitanium separator is a kind of compound force field equipment, and background magnetic field intensity is 1000-
12000Gs。
And the advantage of this technique is that ore enters before grinding machine, drawing in row using weight magnetic throws tail, and benefit has two o'clock: 1. existing
Ore is thrown except the gangue mineral largely dissociated in advance before entering grinding machine, reduces the treating capacity of subsequent ore grinding and separation operation；2. mentioning
It is preceding to throw a large amount of primary slimes generated due to slacking except ore, reduce infecting for the ilmenite that it dissociates ore grinding.Spiral
Chute is sorted by the difference of specific gravity of different minerals in ore, and in existing preparation equipment, cost is minimum, operation
It is more stable.Feed ore concentration and the suitable lateral flushing water of addition are controlled, sharpness of separation is higher.It is sorted by first two steps, base
Originally the gangue mineral that 95% or more sludge and 90% or more in ore can be removed greatly reduces the sorting pressure of third step
And treating capacity.In order to ensure third step obtains qualified ilmenite concentrate, general second step is needed the TiO of ilmenite2Grade improves
To 30% or more.Third step is by adjusting suitable background magnetic field intensity and baffle inclination angle, available high-precision iron ore concentrate
And ilmenite concentrate.
Ilmenite is currently without Fully-mechanized sorting method, and in addition the present invention does not need floating agent and temperature is not straight
Relationship is connect, concentration has certain influence, another influence factor is exactly granularity.In ore dressing, magnetic field strength, concentration, granularity, including set
Standby parameter is determined by ore properties, and concentration has a probable ranges, is influenced by ore properties smaller.
The feature or advantage of this technique maximum are: no beneficiation reagent uses, environmentally protective；Waste water is Ke Xunhuanliyong；Equipment
Cost and subsequent production are low in cost, available qualified concentrate products, similar with traditional handicraft index, due to not needing to float
Choosing does not need beneficiation reagent so ore does not need fine grinding yet, beneficiation wastewater do not need individually to handle yet can reuse, cost
Lower, subsequent production is also more stable.Present invention is generally directed to the Primary ilmenite ore of the embedding cloth of coarse grain and liberation degree of minerals are preferable
Ilmenite type placer, particularly with such poor value.Traditional handicraft cost can not pass, the invention advantage body
Now become apparent.The prior art has application to single equipment, is applied in combination and does not report, and the use that combines, can be with
The original dull embedding cloth low-grade ilmenite of coarse grain is set to become have utility value, especially for the low-grade ferrotianium of water-deficient area
Mine (advantage of this technique lies also in this, for example grade of titanium dioxide is in 6% extreme poverty weathering Primary ilmenite below) throws tail
It is based on magnetic mineral, preenrichment is finally to be based on magnetic mineral again based on ore difference of specific gravity, carries out dry separation.Throw the mesh of tail
Be to be thrown in advance except tailing, reduce subsequent job treating capacity, while can be with desliming；Preenrichment is mainly exactly by the grade of ore
Certain level is promoted, being not so directly entered dry magnetic cannot get qualified ilmenite concentrate product, and the two complements each other, and throws tail and more stresses
It dishes out sundries, desliming, preenrichment more stresses to improve the enrichment degree of target mineral.
The ore grain size of this process is thicker, and does not use flotation；Ore has carried out the processing of throwing tail in coarse grain, after reduction
The treating capacity of continuous sorting；Equipment cost and subsequent loss are all lower than traditional strong magnetic+floatation process；This process unit mine
The water consume of stone is lower, and energy consumption is also lower, does not also need using medicament.Therefore, the beneficiation cost of this technique is only traditional handicraft
30% or so, the economic utilization of many dull mines may be implemented.
Beneficial effects of the present invention:
1) water consumption for handling unit ore is seldom, is particularly adapted to drought and water-scarce area；
2) it is added without beneficiation reagent, green non-pollution；
3) process flow is simple and efficient, low production cost, meets the green low-carbon cycle development policy of country's promotion.
Detailed description of the invention
Fig. 1 principle flow chart of the present invention.
Specific embodiment
Technical effect in order to further illustrate the present invention is specifically described the present invention below by embodiment.
Embodiment 1
The ferrotianium green ore of processing contains TFe 10.20%, contains TiO24.55% (wherein available Armco magnetic iron accounts for TFe's
19.5%, TiO in ilmenite2Account for whole TiO269.8%), tcrude ore is crushed, then with ZCLA weight magnetic draw ore separators carry out
Wet type throws tail (it is 6000Gs that ZCLA weight magnetic, which draws the background magnetic field intensity of ore separators), obtains throwing tail concentrate and throws tail tailing；Then
Tail fine grinding to -0.074mm content will be thrown and account for 32%, subsequently into spiral chute, the ore pulp of each section of spiral chute sorting is dense
Degree: roughing section is 20%, and selected section is 28%, and scanning section is 12%, obtains spiral concentrate and spiral tailing；Finally by spiral essence
Mine concentration, filters pressing and drying, subsequently into joint ferrotitanium separator, isolated iron ore concentrate, ilmenite concentrate and dry separation tailing, iron essence
It is 60.78%, the TFe rate of recovery is 13.10% that mineral products rate, which is 2.20%, TFe grade,.Ilmenite concentrate yield is 4.61%, TiO2Product
Position is 46.17%, TiO2The rate of recovery is 46.72%.
Embodiment 2
The ferrotianium green ore of processing contains TFe 10.40%, contains TiO25.55% (wherein available Armco magnetic iron accounts for TFe's
18.9%, TiO in ilmenite2Account for whole TiO275.8%), tcrude ore is crushed, then using ZCLA weight magnetic draw ore separators into
Row wet type throws tail (it is 6500Gs that ZCLA weight magnetic, which draws the background magnetic field intensity of ore separators), obtains throwing tail concentrate and throws tail tailing；It connects
Will throw tail fine grinding and account for 40% to -0.074mm content, subsequently into spiral chute, the ore pulp of each section of spiral chute sorting
Concentration: roughing section is 21%, and selected section is 26%, and scanning section is 11%, obtains spiral concentrate and spiral tailing；Finally by spiral
Concentrate concentration, filters pressing and drying, subsequently into joint ferrotitanium separator, isolated iron ore concentrate, ilmenite concentrate and dry separation tailing, iron
It is 60.90%, the TFe rate of recovery is 14.10% that concentrate yield, which is 2.35%, TFe grade,.Ilmenite concentrate yield is 4.81%, TiO2
Grade is 47.27%, TiO2The rate of recovery is 46.92%.
Embodiment 3
The ferrotianium green ore of processing contains TFe 11.41%, contains TiO25.25% (wherein available Armco magnetic iron accounts for TFe's
18.5%, TiO in ilmenite2Account for whole TiO272.3%), tcrude ore is crushed, then with ZCLA weight magnetic draw ore separators carry out
Wet type throws tail (it is 7000Gs that ZCLA weight magnetic, which draws the background magnetic field intensity of ore separators), obtains throwing tail concentrate and throws tail tailing；Then
Tail fine grinding to -0.074mm content will be thrown and account for 45%, subsequently into spiral chute, the ore pulp of each section of spiral chute sorting is dense
Degree: roughing section is 22.5%, and selected section is 27.5%, and scanning section is 12.5%, obtains spiral concentrate and spiral tailing；Finally will
The concentration of spiral concentrate, filters pressing and drying, subsequently into joint ferrotitanium separator, isolated iron ore concentrate, ilmenite concentrate and dry separation tail
Mine, it be 60.23%, the TFe rate of recovery is 13.89% that iron ore concentrate yield, which is 2.05%, TFe grade,.Ilmenite concentrate yield is 4.65%,
TiO2Grade is 48.01%, TiO2The rate of recovery is 43.82%.
Embodiment 4
The ferrotianium green ore of processing contains TFe 9.88%, contains TiO25.43% (wherein available Armco magnetic iron accounts for TFe's
17.5%, TiO in ilmenite2Account for whole TiO268.3%), tcrude ore is crushed, then with ZCLA weight magnetic draw ore separators carry out
Wet type throws tail (it is 8000Gs that ZCLA weight magnetic, which draws the background magnetic field intensity of ore separators), obtains throwing tail concentrate and throws tail tailing；Then
Tail fine grinding to -0.074mm content will be thrown and account for 55%, subsequently into spiral chute, the ore pulp of each section of spiral chute sorting is dense
Degree: roughing section is 24%, and selected section is 29%, and scanning section is 14%, obtains spiral concentrate and spiral tailing；Finally by spiral essence
Mine concentration, filters pressing and drying, subsequently into joint ferrotitanium separator, isolated iron ore concentrate, ilmenite concentrate and dry separation tailing, iron essence
It is 60.53%, the TFe rate of recovery is 11.88% that mineral products rate, which is 3.00%, TFe grade,.Ilmenite concentrate yield is 5.35%, TiO2Product
Position is 47.33%, TiO2The rate of recovery is 44.35%.
Embodiment 5
The ferrotianium green ore of processing contains TFe 10.66%, contains TiO26.43% (wherein available Armco magnetic iron accounts for TFe's
19.6%, TiO in ilmenite2Account for whole TiO269.3%), tcrude ore is crushed, then with ZCLA weight magnetic draw ore separators carry out
Wet type throws tail (it is 7500Gs that ZCLA weight magnetic, which draws the background magnetic field intensity of ore separators), obtains throwing tail concentrate and throws tail tailing；Then
Tail fine grinding to -0.074mm content will be thrown and account for 35%, subsequently into spiral chute, the ore pulp of each section of spiral chute sorting is dense
Degree: roughing section is 25%, and selected section is 30%, and scanning section is 15%, obtains spiral concentrate and spiral tailing；Finally by spiral essence
Mine concentration, filters pressing and drying, subsequently into joint ferrotitanium separator, isolated iron ore concentrate, ilmenite concentrate and dry separation tailing, iron essence
It is 60.93%, the TFe rate of recovery is 12.98% that mineral products rate, which is 3.20%, TFe grade,.Ilmenite concentrate yield is 5.47%, TiO2Product
Position is 46.87%, TiO2The rate of recovery is 46.82%.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention rather than limits, although ginseng
Technical solution of the present invention is described in detail according to preferred embodiment, it will be appreciated by those skilled in the art that can be to this
The technical solution of invention is modified or replaced equivalently, and without departing from the purpose and scope of the invention, should all be covered at this
In the protection scope of invention.
Claims (8)
1. a kind of recovery process of extreme poverty weathering Primary ilmenite, which comprises the following steps:
1) pre-treatment: tcrude ore is crushed, and is then fed ZCLA weight magnetic and is drawn ore separators, carries out wet type and throw tail, obtain throwing tail concentrate
With throwing tail tailing；
2) preenrichment: tail fine grinding will be thrown subsequently into spiral chute and obtain spiral concentrate and spiral tailing；
3) it separates: by the concentration of spiral concentrate, filters pressing and drying, subsequently into joint ferrotitanium separator, isolated iron ore concentrate, titanium
Concentrate and dry separation tailing.
2. recovery process according to claim 1, which is characterized in that step 1) the broken grade is 5-100mm.
3. recovery process according to claim 1, which is characterized in that step 1) the ZCLA weight magnetic draws the background of ore separators
Magnetic field strength is 4000-10000Gs.
4. recovery process according to claim 1, which is characterized in that fine mill size described in step 2) is that -0.074mm is accounted for
Throw tail concentrate 32%-60%.
5. recovery process according to claim 1, which is characterized in that step 2) the spiral chute sorting is closed circuit stream
Journey includes 1 section of roughing, and 1-2 sections are scanned, and 2-5 sections selected.
6. recovery process according to claim 5, which is characterized in that the ore pulp matter of each section of spiral chute sorting in step 2)
Measure concentration: roughing section is 20%-25%, and selected section is 25%-35%, and scanning section is 10%-15%.
7. recovery process according to claim 5, which is characterized in that spiral chute roughing section and selected section in step 2),
The lateral flushing water perpendicular to flow of slurry tangential direction is added, roughing section is added at 2-3, at selected section of addition 1-2.
8. recovery process according to claim 1, which is characterized in that step 3) the joint ferrotitanium separator is a kind of multiple
Resultant force field device, background magnetic field intensity are 1000-12000Gs.
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| CN111744663A (en) * | 2020-07-10 | 2020-10-09 | 攀枝花学院 | Ore dressing process for vanadium titano-magnetite |
| CN113713962A (en) * | 2021-08-31 | 2021-11-30 | 长沙矿冶研究院有限责任公司 | Method for producing titanium concentrate from chromium-containing ilmenite |
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| US7695612B2 (en) * | 2006-05-25 | 2010-04-13 | Titanium Corporation Inc. | Process for recovering heavy minerals from oil sand tailings |
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