CN102500462B - Rutile roughing technology consisting of selective ore grinding, coarse particle gravity separation and fine particle floatation - Google Patents
Rutile roughing technology consisting of selective ore grinding, coarse particle gravity separation and fine particle floatation Download PDFInfo
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- CN102500462B CN102500462B CN201110318086.9A CN201110318086A CN102500462B CN 102500462 B CN102500462 B CN 102500462B CN 201110318086 A CN201110318086 A CN 201110318086A CN 102500462 B CN102500462 B CN 102500462B
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 22
- 238000003801 milling Methods 0.000 claims description 17
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- 239000002253 acid Substances 0.000 claims description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 6
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- SPBQTHJZZJMBJO-UHFFFAOYSA-N phenylmethoxyarsonic acid Chemical compound C(C1=CC=CC=C1)O[As](O)(O)=O SPBQTHJZZJMBJO-UHFFFAOYSA-N 0.000 claims description 6
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- 238000004513 sizing Methods 0.000 claims description 4
- PGKQTZHDCHKDQK-VOTSOKGWSA-N [(e)-2-phenylethenyl]phosphonic acid Chemical compound OP(O)(=O)\C=C\C1=CC=CC=C1 PGKQTZHDCHKDQK-VOTSOKGWSA-N 0.000 claims description 3
- 239000012190 activator Substances 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000005336 cracking Methods 0.000 claims description 2
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- 229910000831 Steel Inorganic materials 0.000 abstract description 2
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- 230000003213 activating effect Effects 0.000 abstract 1
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Abstract
The invention discloses a rutile roughing technology for consisting of selective ore grinding, coarse particle gravity separation and fine particle floatation, belonging to the technical field of mineral processing engineering. According to the characteristics of complex mineral composition of rutile, containing of a large quantity of flaky rocky minerals in raw ore, small crystal size of rutile,non-uniform distribution, remarkable selective grinding phenomenon in an ore grinding process and the like, the technology comprises the following steps of: strengthening selective ore grinding by taking a steel forging as an ore grinding medium; pre-separating and discarding coarse particle tailings with a high-frequency fine sieve; narrowing the particle composition undersize minerals; recovering large-particle rutile by performing gravity separation, wherein rutile in gravity-separated tailings is distributed at a fine particle scale; sieving and discarding coarse-particle tailings; recovering small-particle rutile from minus sieve by suppressing rutile reverse flotation desliming and activating rutile positive floatation; and combining gravity-separated rough concentrate with floated rough concentrate, concentrating and purifying to obtain a high-quality rutile concentrate product. The technology has the characteristics of simple process, low ore dressing cost, high recovery rate,high concentration ratio, and the like.
Description
Technical field
The rutile ore that the present invention relates to a kind of selective milling-coarse grain gravity treatment-fine particles flotation is roughly selected technology, belongs to the Mineral Processing Engineering technical field.
Background technology
Natural rutile is because TiO
2Content height, impurity are few, are the desirable feedstock of chloride process titanium dioxide powder and titanium sponge.China natural rutile ore deposit 86% belongs to primary ore, mainly is distributed in provinces such as Hubei, Jiangsu, Shanxi, Henan, Shaanxi, Sichuan, Anhui.In recent years, found large-scale, super-huge rutile mineral deposit on Henan mahjong, Shangnan, Shaanxi, Jiangsu Xin Hai, Shanxi Dai County and other places.So, the development and use of China's natural rutile resource, the development to titanium industries such as China's rutile titanium white, titanium sponges is of great immediate significance.Yet China natural rutile ore deposit belongs to the refractory gold hongshiite, and be characterized in: (1) head grade is lower, contains rutile TiO
2Generally about 2%; (2) general association has sheet mineral such as heavy mineral such as ilmenite, haplotypite, bloodstone, magnetic iron ore and vermiculite, mica, hornblend in the rutile ore; (3) rutile and other mineral embedding cloth relation is complicated, and granularity is generally 0.01～0.2mm and does not wait, and belongs to particulate, the inhomogeneous embedding cloth of microfine, and grain size intervals is big; (4) the easy argillization of ore often contains a large amount of primary slimes and secondary slime in the ore dressing process; (5) ore often contains the impurity element such as sulphur, phosphorus of influential rutile concentrate quality; (5) in the rutile mineral, generally contain impurity components such as the Fe, the Si that exist with class matter same form, Ca, ore dressing is difficult to get rid of.The main cause that China's rutile ore can not get rational exploitation and utilization is: (1) rutile selects that the factory rules and regulations mould is too little, cost is too high; (2) ore-dressing technique is backward, equipment is outmoded; (3) rutile ore comprehensive utilization utilization rate is low; (4) rutile ore sorting technology difficulty is big.
The characteristics of China's rutile ore have determined the ore dressing of rutile will adopt the different combined mineral dressing technologies of forming such as gravity treatment, flotation, magnetic separation, electric separation, chemical mineral processing, just can obtain high-quality rutile concentrate product.So, fundamentally reduce beneficiation cost, improve sorting index, must guarantee that low cost is roughly selected the throwing tail in a large number, then rutile rough concentrate cleaning and Purification under the higher prerequisite of the rutile rate of recovery.Rutile rough concentrate cleaning and Purification generally will adopt the technology based on chemical mineral processing, and the space aspect the reduction beneficiation cost is little, so the key of rutile separation process is to roughly select the throwing tail.
The ore dressing of rutile is at present roughly selected and is thrown tail and mainly adopt behind the ore grinding directly gravity treatment to throw tail and roughing flotation is thrown tail.Because rutile fine size, and the gangue mineral granularity is thicker, and the medium phenomenon of falling of reuse adoption process seriously causes the rutile loss big, and the rutile fine size, the shaking tables that adopt could obtain separating effect preferably more, have significant limitation and the unit disposal ability of shaking table is low, water consumption is big etc.Roughing flotation is thrown tail and is mainly adopted direct flotation behind the ore grinding, and the rutile ore weathering is serious, contains a large amount of primary slimes, produces a large amount of secondary slimes in the grinding process again, and the existence of a large amount of sludges has worsened flotation effect, and consumes a large amount of medicaments.
Summary of the invention
The rutile that the purpose of this invention is to provide a kind of selective milling-coarse grain gravity treatment-fine particles flotation is roughly selected technology, and the operational characteristic of this technology joining gold hongshiite realizes that the low-cost high target of primary rutile ore roughly selects the throwing tail.Owing to contain sheet mineral such as a large amount of vermiculites, mica, hornblend in the rutile ore, in the grinding process, there is bigger grindability difference between rutile and these sheet mineral, rutile is enriched in the fine fraction, sheet mineral such as vermiculite, mica, hornblend are enriched in the coarse fraction, produce selectively grinding based on dissociating property ore grinding.Adopt forging as milling medium; both can protect the particulate rutile only to pulverize, can strengthen between rutile and the sheet mineral selectively grinding again, under thicker relatively grinding condition; namely improve the rutile liberation degree of minerals, do not grind gangue mineral meticulous again.Adopt the high frequency fine screen screening behind the ore grinding, the sheet mineral of coarse grain can be screened out (can throw tail 10-20%), sieve rutile enrichment has down improved selected grade.After the screening, narrow down during the granularity, be conducive to gravity treatment and reclaim the thicker rutile of granularity.Adopt the spiral chute gravity treatment can improve the unit disposal ability and reduce beneficiation cost, the rough concentrate of spiral chute can adopt spiral chute or shaking table further to upgrade again, and chats is regrinded and the part intergrowth dissociated return gravity treatment.The rutile granularity that is lost in the gravity tailings is thinner, adopts high frequency fine screen again, can sift out gangue mineral thicker in the gravity tailings (20-35%), and the thinner rutile of granularity enters sieve down, and sieve rutile down adopts flotation to reclaim.The flotation of rutile adopts the stepped-flotation separation technology that suppresses rutile reverse-floatation mud-removing reactivation rutile direct flotation earlier can reduce reagent cost, improve sorting index.
The present invention finishes according to the following steps:
1, crushing raw ore is sized to suitable ore grinding feed preparation unit size, is limited to 6～15mm on the general particle size after cracking.If fine ore is more in the raw ore, or weathering is serious, can consider to increase the washup operation and tell smitham in advance, avoids overground and reduces the ore grinding amount.
2, behind the crushing raw ore, feed ore mill and carry out open-circuit grinding, milling medium selects for use forging to replace steel ball to strengthen the selective of ore grinding, rutile and gangue mineral are ground along dissociating property of mineral faying face as far as possible, improve the monomer solution granularity of rutile, and avoid the overground phenomenon of rutile and gangue mineral to produce as far as possible.The diameter of general forging is 40～60mm.
3, the ore mill ore pulp of discharging adopts the high frequency fine screen screening, and gravel and the sheet gangue mineral of the awkward mill of oversize can be used as that mine tailing is abandoned or comprehensively reclaim accessory substances such as wherein vermiculite, mica.Rutile is enriched in the undersized product, and screening back granularmetric composition narrows down, and is conducive to gravity treatment.
4, the gravity separation technology based on the big spiral chute of disposal ability is adopted in gravity treatment, carry out gravity treatment and reclaim granularity thicker rutile relatively, concentrate adopts spiral chute selected 2～3 times or obtain gravity treatment rutile rough concentrate for 1 time with table concentration again after the spiral chute gravity treatment, the gravity treatment chats is regrinded and is returned the gravity treatment flow process and select, what lose in the gravity tailings is the particulate rutile, can sift out the thicker gangue mineral of granularity so adopt high frequency fine screen to sieve again, down rutile enrichment of sieve, dewatering to pulp density is to feed flotation operation at 20～30% o'clock.
5, the sieve aperture of high frequency fine screen is 0.3～1mm for the first time, and the sieve aperture of high frequency fine screen is 0.074～0.1mm for the second time; High frequency fine screen can be thrown tail and account for 10～20% of original feed for the first time, and high frequency fine screen can be thrown tail and account for 20～35% of original feed for the second time.Twice screening can be thrown tail and be accounted for 30～55% of raw ore.
6, adding the sodium carbonate adjust pH under the sieve of high frequency fine screen screening for the second time is 7～8, adds aluminum sulfate 600～800g/t and suppresses rutile, adds enuatrol 30～50g/t as the collecting agent of silicate gangue mineral, and adds 2
#Oil 20g/t carries out 2～3 deslimings of reverse flotation after sizing mixing.Behind the reverse flotation, adding the sodium carbonate adjust pH is 8.5, add gangue mineral composite restrainer prodan 300～500g/t and carboxymethyl cellulose 100～300g/t, add rutile activator plumbi nitras (or lead acetate) 200～400g/t, add rutile combined capturing and collecting agent hydroximic acid sodium 300～500g/t and benzyl arsenic acid (or styryl phosphonic acid) 200～400g/t, carry out the rutile direct flotation after sizing mixing, carry out the selected flotation rutile rough concentrate that obtains behind the direct flotation 2～3 times.
7, raw ore is the rutile ore that contains rutile about 2%, by above step, both selective millings, tail is thrown in the high frequency fine screen screening, sieve gravity treatment down obtains gravity treatment rutile rough concentrate, the gravity treatment chats is regrinded and is returned choosing again, gravity tailings sieves the throwing tail again, sieve rutile down suppresses the rutile reverse-floatation mud-removing earlier, reactivation rutile direct flotation obtains flotation rutile rough concentrate, gravity treatment, the mixed crude concentrate grade that flotation obtains reaches 48～52%, the rate of recovery is 80～83%, throw tail more than 95%, only account for the raw ore productive rate and enter the cleaning and Purification operation less than 5% rough concentrate, greatly reduce beneficiation cost.
The advantage and the good effect that have than the present invention with technique known:
(1) the present invention adopts forging to strengthen selective milling as milling medium in grinding process, realizes dissociating property ore grinding, under thicker mog condition, allows rutile monomer dissociation as far as possible, and gangue mineral is not ground too thin; Particle size differences between gangue mineral and the rutile is big, adopts the high frequency fine screen screening, can effectively abandon the coarse grain gangue mineral, makes rutile enrichment under sieve, and particle size range narrows down, and is conducive to improve the gravity treatment index of rutile.It is the important support point of realizing this technology that selective milling, dusting cover are thrown tail.
(2) the spiral chute gravity treatment is conducive to reclaim granularity thicker rutile relatively, the thinner rutile of granularity is lost in the gravity tailings, screening for the second time, oversize is coarse grain gangue mineral in the gravity tailings, the enrichment under sieve of particulate rutile, screening is for the second time thrown tail and has been reduced the ore deposit amount that enters flotation, has reduced the beneficiation cost of flotation.The spiral chute gravity treatment obtains rough concentrate, and the gravity tailings screening makes the enrichment of particulate rutile, is another important support point of realizing this technology.
(3) rutile adopts inhibition rutile reverse-floatation mud-removing under the sieve, when further throwing tail and reduce sludge to the interference of rutile flotation, reduced the consumption of medicament, for activation rutile direct flotation has been created advantage, having improved the flotation sorting index and reduced beneficiation cost, is another important support point of realizing this technology.
(4) present technique is compared with technique known, adopt forging to strengthen selective milling, tail is thrown in screening, undersize degree composition narrows down and is beneficial to gravity treatment recovery coarse grain rutile, rutile still is distributed in fine fraction in the gravity tailings, tail is thrown in screening again, the following reverse-floatation mud-removing of sieve is the direct flotation rutile again, and this technology takes full advantage of the difference on rutile and the gangue mineral granularity, and the inhomogeneous characteristics of rutile size distribution realize the coarse grain gravity treatment, fine particles flotation, gravity treatment combines with flotation and realizes having complementary advantages, technology is simple, and this technology is compared with the known technology of roughly selecting, rutile concentration ratio height, rate of recovery height, throw tail productive rate height, can reduce the beneficiation cost of rutile greatly.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
Embodiment 1:
The Shaanxi rutile ore contains rutile TiO
21.98%, gangue mineral is mainly vermiculite and hydromica class, hornblend etc., also contains a small amount of iron-bearing mineral magnetic iron ore, bloodstone and clay mineral.The rutile disseminated grain size is thin, general 0.01～0.1mm does not wait, belong to particulate, the inhomogeneous embedding cloth of microfine, most rutile are interrupted striped, streak arrangement with monomer, aggregate form along the schistosity direction of ore, mixing with vermiculite, hydromica of having generates agglomerate, and what have is wrapped up by hornblend, biotite.Because the raw ore weathering is serious, raw ore employing double-deck screen shale shaker (upper strata sieve aperture 45mm, the sieve aperture 6mm of lower floor) is increased setting-out and is carried out washup, and the oversize merging is crushed to 15mm, screenings adopts the spiral classifier classification, partition size is 0.2mm, and sand return and crushed product merging enter ore grinding, and the forging diameter is 40mm, the high frequency fine screen screening is carried out in overflow and ore milling product merging, sieve aperture is 0.2mm, and productive rate is 13.50% on the sieve, contains rutile TiO
20.23%, can reclaim vermiculite on the sieve.Undersized product feeds spiral chute one thick three smart gravity treatment, chats and regrinds and return the gravity treatment flow process and select, and obtaining spiral chute gravity treatment rough concentrate productive rate is 1.37%, and grade is 51.34%, and the rate of recovery is 35.53%.Gravity tailings feeds high frequency fine screen screening for the second time, and sieve aperture is 0.074mm, and sieve upthrow tail productive rate is 26.43%, contains rutile TiO
20.26%.Sieve rutile down dewaters to pulp density 26.04%, and adding the sodium carbonate adjust pH is 8, adds aluminum sulfate 800g/t, adds enuatrol 50g/t, adds 2
#Oil 20g/t carries out reverse flotation 3 times, and the foam productive rate of three reverse flotations is 34.21%, contains rutile TiO
20.42%.Behind the reverse flotation, adding the sodium carbonate adjust pH is 8.5, adds prodan 400g/t and carboxymethyl cellulose 200g/t, add plumbi nitras 300g/t, add hydroximic acid sodium 350g/t and benzyl arsenic acid 300g/t, carry out the direct flotation rutile and roughly select, rougher tailings is scanned once, and froth pulp returns to be roughly selected; Roughly select foam carry out twice selected, selected foam is the rutile rough concentrate, chats return in proper order form closed circuit.Namely by above three reverse flotations, the closed circuit direct flotation of slightly sweep, twice is selected, can obtain productive rate is 2.03%, and grade is 47.23%, and the rate of recovery is 48.43% rutile flotation rough concentrate, and direct flotation is thrown tail 22.46%, contains rutile TiO
20.33%.The rutile of selective milling-coarse grain gravity treatment-fine particles flotation is roughly selected technology, obtaining grade is 48.88%, and the rate of recovery is 83.96% rutile mixed crude concentrate, throws tail 96.60% altogether, the rough concentrate that only accounts for raw ore 3.40% enters selected, greatly reduces beneficiation cost.
Embodiment 2:
The Henan rutile ore contains rutile TiO
22.09%, the rutile disseminated grain size is thin, and general 0.01～0.2mm does not wait, and belongs to particulate, the inhomogeneous embedding cloth of microfine, the awkward rutile ore that selects.Raw ore is fed ore grinding through crushing and screening to 12mm, and milling medium forging diameter is 40mm, and ore milling product is given to the high frequency fine screen screening, and sieve aperture is 0.15mm, and sieve upthrow tail productive rate is 12.87%, contains rutile TiO
20.31%.Screenings feeds spiral chute one thick three essences, chats is regrinded and returned choosing again, and obtaining spiral chute gravity treatment rough concentrate productive rate is 1.45%, and grade is 49.80%, and the rate of recovery is 34.52%.Gravity tailings feeds high frequency fine screen screening for the second time, and sieve aperture is 0.1mm, and sieve upthrow tail productive rate is 23.14%, contains rutile TiO
20.28%.Dewater to pulp density 28.30% under the sieve, adding the sodium carbonate adjust pH is 8, adds aluminum sulfate 700g/t, adds enuatrol 30g/t, adds 2
#Oil 20g/t carries out reverse flotation 3 times, and the foam productive rate of three reverse flotations is 28.76%, contains rutile TiO
20.47%.Behind the reverse flotation, adding the sodium carbonate adjust pH is 8.5, adds prodan 300g/t and carboxymethyl cellulose 300g/t, add lead acetate 200g/t, add hydroximic acid sodium 500g/t and benzyl arsenic acid 400g/t, carry out the direct flotation rutile and roughly select, rougher tailings is scanned once, and froth pulp returns to be roughly selected; Roughly select foam carry out twice selected, selected foam is the rutile rough concentrate, chats return in proper order form closed circuit.Namely by above three reverse flotations, the closed circuit direct flotation of slightly sweep, twice is selected, can obtain productive rate is 2.11%, and grade is 48.90%, and the rate of recovery is 49.32% rutile flotation rough concentrate, and direct flotation is thrown tail 31.67%, contains rutile TiO
20.31%.The rutile of selective milling-coarse grain gravity treatment-fine particles flotation is roughly selected technology, obtaining grade is 49.27%, and the rate of recovery is 83.84% rutile mixed crude concentrate, throws tail 96.44% altogether, the rough concentrate that only accounts for raw ore 3.56% enters selected, greatly reduces beneficiation cost.
Embodiment 3:
The Henan rutile ore contains rutile TiO
22.10%, the rutile disseminated grain size is thin, and general 0.01～0.2mm does not wait, and belongs to particulate, the inhomogeneous embedding cloth of microfine, the awkward rutile ore that selects.Raw ore is fed ore grinding through crushing and screening to 12mm, and milling medium forging diameter is 60mm, and ore milling product is given to the high frequency fine screen screening, and sieve aperture is 0.3mm, and sieve upthrow tail productive rate is 13.87%, contains rutile TiO
20.25%.Screenings feeds spiral chute one thick three essences, chats is regrinded and returned choosing again, and obtaining spiral chute gravity treatment rough concentrate productive rate is 1.40%, and grade is 50.80%, and the rate of recovery is 35.12%.Gravity tailings feeds high frequency fine screen screening for the second time, and sieve aperture is 0.09mm, and sieve upthrow tail productive rate is 24.14%, contains rutile TiO
20.27%.Dewater to pulp density 27.30% under the sieve, adding the sodium carbonate adjust pH is 7, adds aluminum sulfate 600g/t, adds enuatrol 40g/t, adds 2
#Oil 20g/t carries out reverse flotation 3 times, and the foam productive rate of three reverse flotations is 30.76%, contains rutile TiO
20.45%.Behind the reverse flotation, adding the sodium carbonate adjust pH is 8.5, adds prodan 500g/t and carboxymethyl cellulose 100g/t, add plumbi nitras 400g/t, add hydroximic acid sodium 300g/t and benzyl arsenic acid 200g/t, carry out the direct flotation rutile and roughly select, rougher tailings is scanned once, and froth pulp returns to be roughly selected; Roughly select foam carry out twice selected, selected foam is the rutile rough concentrate, chats return in proper order form closed circuit.Namely by above three reverse flotations, the closed circuit direct flotation of slightly sweep, twice is selected, can obtain productive rate is 2.08%, and grade is 48.10%, and the rate of recovery is 48.92% rutile flotation rough concentrate, and direct flotation is thrown tail 29.67%, contains rutile TiO
20.32%.The rutile of selective milling-coarse grain gravity treatment-fine particles flotation is roughly selected technology, obtaining grade is 49.07%, and the rate of recovery is 83.89% rutile mixed crude concentrate, throws tail 96.54% altogether, the rough concentrate that only accounts for raw ore 3.50% enters selected, greatly reduces beneficiation cost.
Claims (5)
1. the rutile of selective milling-coarse grain gravity treatment-fine particles flotation is roughly selected method, it is characterized in that finishing according to the following steps:
(1) crushing raw ore is sized to suitable ore grinding feed preparation unit size, is limited to 6～15mm on the particle size after cracking;
(2) behind the crushing raw ore, feed ore mill and carry out open-circuit grinding;
(3) ore pulp of ore mill discharge carries out the high frequency fine screen screening first time, the coarse grain gangue mineral of skimming;
(4) the employing spiral chute carries out gravity treatment under the sieve, reclaim granularity thicker rutile relatively, concentrate adopts spiral chute selected 2～3 times or with table concentration 1 time again after the gravity treatment, obtain gravity treatment rutile rough concentrate, the chats that produces in the reuse adoption process is regrinded and is returned the gravity treatment flow process and select, and mine tailing carries out the high frequency fine screen screening second time again after the gravity treatment, abandons the thicker gangue mineral of granularity again, down rutile enrichment of sieve, dewatering to pulp density is to enter flotation operation at 20～30% o'clock;
(5) adopt sodium carbonate to regulate the pH value under the sieve of high frequency fine screen screening for the second time, add aluminum sulfate and suppress rutile, use the enuatrol reverse-floatation mud-removing, behind the reverse-floatation mud-removing, add gangue mineral inhibitor prodan and carboxymethyl cellulose, combination suppresses gangue mineral, adopt plumbi nitras or lead acetate to make the rutile activator, adopting hydroximic acid sodium is main collecting agent, benzyl arsenic acid or styryl phosphonic acid are supplementary catching agent, carry out the direct flotation rutile, and direct flotation carries out direct flotation earlier and roughly selects, rougher tailings is scanned once, and froth pulp returns to be roughly selected; Roughly select then foam carry out twice selected, selected foam is the rutile rough concentrate, chats return in proper order form closed circuit;
Described raw ore milling medium is selected forging for use, and the diameter of forging is 40～60mm.
2. the rutile of selective milling according to claim 1-coarse grain gravity treatment-fine particles flotation is roughly selected method, it is characterized in that raw ore is the ore that contains rutile 1%～10%.
3. the rutile of selective milling according to claim 1-coarse grain gravity treatment-fine particles flotation is roughly selected method, it is characterized in that if fine ore is more in the raw ore, or weathering increases the washup operation when serious, tells smitham in advance.
4. the rutile of selective milling according to claim 1-coarse grain gravity treatment-fine particles flotation is roughly selected method, it is characterized in that the sieve aperture of high frequency fine screen is 0.3～1mm for the first time, and the sieve aperture of high frequency fine screen is 0.074～0.1mm for the second time.
5. the rutile of selective milling according to claim 1-coarse grain gravity treatment-fine particles flotation is roughly selected method, it is characterized in that adding the sodium carbonate adjust pH under the sieve of high frequency fine screen screening for the second time is 7～8, add aluminum sulfate 600～800g/t and suppress rutile, add enuatrol 30～50g/t as the collecting agent of silicate gangue mineral, and add 2# oil 20g/t, carry out 2～3 deslimings of reverse flotation after sizing mixing; Behind the reverse flotation, be 8.5 with the sodium carbonate adjust pH, add gangue mineral composite restrainer prodan 300～500g/t and carboxymethyl cellulose 100～300g/t, add rutile activator plumbi nitras or lead acetate 200～400g/t, add rutile combined capturing and collecting agent hydroximic acid sodium 300～500g/t and benzyl arsenic acid or styryl phosphonic acid 200～400g/t, carry out the rutile direct flotation after sizing mixing, obtain the rutile rough concentrate behind the direct flotation.
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| CN109311027A (en) * | 2016-05-11 | 2019-02-05 | 英美资源服务（英国）有限公司 | Reduce the demand on tailing storage dam in mineral floating |
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| CN111437999B (en) * | 2020-04-29 | 2022-07-05 | 海南文盛新材料科技有限公司 | Mineral separation process for improving rutile electric separation efficiency based on microwave pretreatment |
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