CN102974470B - Oolitic hematite flocculant and oolitic hematite selective dispersion agglomeration separation method - Google Patents
Oolitic hematite flocculant and oolitic hematite selective dispersion agglomeration separation method Download PDFInfo
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Abstract
The invention provides a oolitic hematite flocculant, which is prepared by mixing carboxymethyl starch, sodium acrylate, a cross-linking agent and an initiator, heating for reaction for a certain time, and purifying; the flocculant has strong selective adsorption capacity on hematite, can be used for the selective flocculation (agglomeration) sedimentation desliming of oolitic hematite, and can obtain a high agglomeration adsorption effect at a low dosage; the invention also provides a oolitic hematite selective dispersion agglomeration separation method, which is simple in process, low in grinding fineness requirement, capable of efficiently agglomerating and settling fine hematite minerals in a short time, and good in all-iron recovery rate and grade.
Description
Technical field
The present invention relates to a kind of bloodstone and sort, flocculant and oolitic hematite that particularly a kind of oolitic hematite ore dressing is used selectively disperse agglomerate method for separating.
Background technology
1/9 of China's iron ore deposit reserves are oolitic hematite, account for 30% of China's hematite reserves.This class oolitic hematite often forms large-scale mine, for example a surname in north dragon formula iron ore, southern Ningxiang formula iron ore.Oolitic hematite disseminated grain size superfine and often with siderite, chamosite and phosphorus ore containing symbiosis or parcel mutually, be therefore the iron ore type of generally acknowledged the most difficult choosing both at home and abroad at present.Because oolitic hematite disseminated grain size is superfine and the mutual structure of parcel layer by layer, thus be unfavorable for very much the monomer dissociation of ore, and ore especially easily forms subparticle after muck and ore grinding, and clay content is large.The domestic and international ore dressing research of oolitic hematite comprises dephosphorization, desiliconization, reverse floatation process, high-gradient magnetic separation, new equipment and new technology, direct-reduction process, acidleach, chloridising roasting-acid leaching process etc., but little to the report of its successful enrichment.Therefore, complex structure, grade are low, the roe shape iron ore deposit feature of easy argillization, and this smelting of selecting that has just determined such roe shape iron ore is very difficult.Along with the high speed development of China's steel and iron industry, the poor Iron Ore Reserve of high-grad iron ore deposit and Yi Xuan is increasingly exhausted, and the research of its utilization is had to very important strategic importance.How the iron ore deposit in oolitic hematite is exploited out, become a great problem of current comprehensive utilization of resources.
Past attempts has been carried out a large amount of Experimental study on ore dressing work to the type iron ore, wherein the sorting index of reduction roasting-weak magnetic separation process is relatively better, but because its technological difficulties are to need Ultrafine Grinding, not only cause this process costs high, industrializing implementation difficulty, and fine grinding degree is too high, and mineral are by the argillization producing in various degree, argillization material easily transfers agglomerate to by dispersity in water, and floatation process is produced to adverse effect.And current conventional preparation equipment and medicament are difficult to effectively reclaim the Ultra-fine iron minerals of-10 μ m, therefore the type iron ore resource is not utilized substantially.Along with the available iron ore deposit of China reduces gradually, the efficient technique of preparing of research oolitic hematite stone has highlighted importance and urgency.Relevant Preliminary Results proves, the efficient ore-dressing technique such as Ultrafine Grinding-selective flocculation (agglomerate)-high intensity magnetic separation or flotation, reduction roasting-Ultrafine Grinding-selective flocculation (agglomerate)-low intensity magnetic separation or flotation or selecting smelting combination technique have manifested its superiority.
" difficulty is selected the research of oolitic hematite composite drug system Desliming test to document, Peng can be clear etc., Modern Mineral, the 3rd phase of March in 2009 " in a kind of selective flocculation to remove slime method is provided, take modified starch as flocculant, with NaOH, waterglass and sodium carbonate are dispersant, after dispersant and raw ore are milled to altogether 92wt% mineral granularity and reach below 0.025mm, size mixing (mass fraction of solids 20%), then add flocculant sedimentation desliming, it is 11 o'clock that the method requires pH values of pulp, just can reach better desliming effect, and the good grade of guarantee and the rate of recovery when flocculant consumption is 400g/ ton ore pulp (or raw ore), this flocculation ability that this technique flocculant is described a little less than, and the technological requirement of this high alkalinity will cause significant damage to equipment, reagent dosage is too high simultaneously, economical not.
Document " fine oolitic hematite flocculation behavioral study, Li Feng waits so long, metal mine, o. 11th in 2009 " a kind of flocculating setting Desliming method is provided, to add after dispersant and flocculant in the ore pulp that is 2% to mass fraction of solids, sedimentation desliming sorting, the document studies show that, dispersant dispersibility and consumption are larger on flocculating effect impact, preferably dispersant is sodium metasilicate (consumption be 40mg/L ore pulp-be 2000g/ ton raw ore) or sodium phosphate trimer (consumption be 5mg/L ore pulp-be 250g/ ton raw ore), on this basis, flocculant used in amounts 1mg/L ore pulp (being 50g/ ton raw ore), and in Flocculation Settling Process, pH values of pulp should be controlled in 10 ~ 11 scopes equally.
Relevant research shows, and in oolitic hematite sedimentation desliming assorting room, the kind of dispersant and flocculant and consumption are remarkable to sedimentation desliming influential effect, and dispersant dispersibility difference is also different on the impact of system flocculating degree.In the time that dispersant dispersibility is strong or consumption is higher, the flocculation ability of flocculant will be suppressed, can improve bloodstone flocculating effect by improving flocculant consumption, but because flocculant is subject to bloodstone and the poor impact of quartzy gangue surface potential to the selective absorption of bloodstone, improve simply flocculant consumption and easily change this potential balance, reduce selective absorption effect, the most directly performance be the bloodstone rate of recovery improve and the grade of concentrate declines, and for fear of this situation, accordingly, must be by regulating slurry pH to guarantee the balance of mineral surface current potential.In existing flocculation sorting process, in the higher situation of flocculant consumption, separating effect is generally full iron recovery 95 ~ 97% preferably, full iron grade 52 ~ 53%.
In sum, yet there are no which kind of flocculant can be under non-alkalescence or weak basic condition the oolitic hematite in selective absorption ore pulp, and be issued to good mineral mass settlement effect at consumption compared with low condition.
Summary of the invention
One of object of the present invention is for the deficiencies in the prior art, and a kind of oolitic hematite flocculant is provided, and its preparation method is simple, and condition is easily controlled, product with stable quality, can selective absorption bloodstone and adsorption capacity stronger, but to sludge substantially without absorption; During for oolitic hematite selective flocculation (agglomerate) sedimentation desliming, to mash acid alkalinity without harsh requirement, can under lower consumption condition, obtain better bloodstone agglomerate mass settlement and desliming effect, the full iron recovery of sorting gained concentrate and grade are all comparatively excellent.
Oolitic hematite flocculant of the present invention is to adopt following steps to make:
A, get CMS, acrylic acid, initator, crosslinking agent and deionized water and mix, obtain mixed material, in mixed material, the percentage by weight of each component is respectively: CMS 10～20%, acrylic acid 50～60%, initator 0.5～2%, crosslinking agent 0.01～0.1%, surplus is deionized water;
Temperature to 70～90 ℃ of b, rising mixed material, are incubated 3 ~ 6 hours under stirring condition, must contain the mixed system of CMS and PAA graft;
C, to described mixed system carry out suction filtration, washing after under vacuum condition 50 ~ 70 ℃ be dried to constant weight, obtain crude product;
D, secondary are purified: crude product is mixed with methyl alcohol and at least 20h of Soxhlet extracting, then at not higher than 60 ℃ of temperature vacuum drying extracting gained solid to constant weight, obtain CMS and the PAA graft of purifying, described purifying graft is flocculant required for the present invention, when Soxhlet extracting, the weight ratio of methyl alcohol and crude product is not less than 2.
In step a, CMS is a kind of water soluble starch ether, there is the flocculation of the intrinsic chelating of carboxyl, ion-exchange, many tools anion, and CMS and PAA copolymerization can be introduced carboxylate groups on starch molecule, this not only allows graft electronegativity stronger, and it is poor to improve in ore pulp bloodstone and quartzy gangue surface potential, makes graft stronger to the selective absorption of bloodstone, but to quartz vein ground mass this without absorption; The structure of described CMS graft acrylic acid sodium is tight embedding state, and CMS, as the skeleton of graft, combines a large amount of acrylic acid side chains near it.
The embedding structure that this flexible chain (acrylic acid side chain) and rigid chain (CMS skeleton) interpenetrate, mutually combine makes methyl starch and PAA graft graft copolymer have following these features:
(1) CMS is connected by chemical bond with PAA in the mode of grafting, further increase the molecular weight of compound, and the molecular weight of flocculating effect and flocculant is closely-related, that is to say that the flocculating effect of CMS graft acrylic acid sodium is better than virgin pp acid sodium.
(2) macromolecular chain of CMS is semirigid, and strongly hydrophilic, therefore CMS can open strand by swelling in water, thereby there is very large spatial volume, in the large molecule of this skeleton, access flexible polyacrylic acid side chain, just formed the net macromolecular of tempering toughness with gentleness, such molecular structure is more favourable to catching suspended particles, particularly just more remarkable for fine its effect of bloodstone particle.
(3) high polymer coagulant is because flocculation group is too concentrated, is adsorbed on it around time when being flocculated material, produced each other repulsion, played certain peptizaiton, thereby affected the effect of flocculation.And graft type acrylic acid is to be branched structure, flocculation group disperses, thereby has overcome this shortcoming, has improved flocculating effect.
(4) generally speaking, macromolecule is in the situation that dissolving, and molecular weight is larger, and flocculation efficiency is higher.In addition, will be higher than the high molecular flocculation efficiency of neutrality with the high molecular flocculation efficiency of electric charge.
Therefore, gained flocculant of the present invention is comparatively outstanding to the selective adsorption capacity of bloodstone, can, at self consumption compared with low and in the higher situation of dispersant dosage, obtain good flocculating effect, disperse full iron recovery and the grade of gained concentrate all comparatively outstanding.
In the present invention, the consumption of the materials such as described CMS, PAA and initator is suitable, and they can allow functional group on graft molecular weight, chain length and the strand of gained keep in the reasonable scope; For initator and crosslinking agent, as their consumption exceedes limited range of the present invention, by making, the free radical of participation reaction is excessive, the quantity of growing chain increases, and stopping of chain quickening, and graft molecular weight reduces, adsorption capacity declines, and easily causes PAA autohemagglutination simultaneously, and side reaction is too much.
When use, in the ore pulp system of fully disperseing to bloodstone suspended substance, add flocculant of the present invention, flocculant consumption is generally no more than 100g/ ton raw ore, and (expression way of 100g/ ton raw ore refers to that raw ore per ton uses reagent 100g, all the other are all same), in ore pulp, mass fraction of solids is generally no more than 25%.In described flocculant amount ranges under (being in 100g/ ton raw ore) and the abundant dispersion condition of bloodstone suspended substance, flocculant consumption is higher, mineral mass settlement effect is better, when flocculant consumption exceedes 100g/ ton raw ore, it remains effective to bloodstone mass settlement, but it is no longer obvious that sedimentation rate promotes, and can decline to the selective adsorption capacity of bloodstone simultaneously; When pulp solids mass fraction is 25%, when flocculant consumption is 50g/ ton raw ore, bloodstone sedimentation rate can reach 90% substantially, is low to moderate 20g/ ton raw ore and work as flocculant consumption, and when pulp solids mass fraction is 20%, bloodstone sedimentation rate can be in 80% level.Ore pulp, after flocculation (agglomerate)-desliming is processed, adopts common process to carry out hematite flotation, and the gained concentrate rate of recovery can improve 5% ~ 20% than prior art, and full iron grade can improve 5% ~ 10% than prior art.
It should be noted that, in the present invention, CMS and PAA graft copolymer are the active ingredient that plays flocculation, in step b, in the mixed system of gained, contain this active ingredient, therefore, as equivalents of the present invention, described mixed system is directly allowed for oolitic hematite flocculation sorting as flocculant, just its flocculating effect is given prominence to not as the flocculating effect of pure graft.
As better scheme, described initator is persulfate, and described crosslinking agent is epoxychloropropane or glycerine, and the molecular weight of described graft is 1 × 10
3～1 × 10
7.Can better improve the reaction rate of CMS and PAA copolyreaction as crosslinking agent using epoxychloropropane or glycerine, improve the degree of polymerization of graft.
Two of object of the present invention is that oolitic hematite selectively disperses agglomerate method for separating, comprises the steps:
1. ore grinding is sized mixing: oolitic hematite raw ore and dispersant are ground to the ore content that makes fineness be less than 0.074mm altogether and account for 70～90% of raw ore weight, then add water and size mixing, obtain ore pulp;
2. a sedimentation desliming: after adding described flocculant in ore pulp and mixing, after standing sedimentation to mineral syrup liquid no longer declines, upper strata suspension is separated with lower floor ore pulp, obtain rough concentrate;
3. secondary settlement desliming: rough concentrate is returned after regrinding and sized mixing, obtain rough concentrate ore pulp, add flocculant in rough concentrate ore pulp, after mixing, standing sedimentation to mineral syrup liquid no longer declines, separates upper strata suspension with lower floor ore pulp, obtain concentrate.Step 2. and 3., adopts siphon or magnetic selection method all can realize the object that bloodstone is separated with gangue mineral.
It is the improvement to existing flocculation sorting process that oolitic hematite of the present invention selectively disperses agglomerate method for separating, wherein, dispersant allows to adopt conventional hematite separation dispersant, dispersant dosage so that in ore pulp bloodstone suspended substance fully disperse.
The method not only technique is simple, and mog requires low, and owing to having adopted the flocculant that bloodstone is possessed to outstanding selective adsorption capacity, having realized within a short period of time fine bloodstone mineral can be by efficient mass settlement, and the bloodstone rate of recovery is protected; Meanwhile, because flocculant possesses stronger adsorption capacity, dispersant is weakened on the impact of flocculating effect, even if dispersant dosage is higher, flocculant consumption of the present invention also can be significantly less than the flocculant use amount of prior art; On the other hand, the inventive method has overcome the deficiency that existing flocculation process need to carry out under high alkalinity condition, is a kind of technique that can carry out under low alkalinity or ore pulp nature pH condition, light to the corrosivity harm of equipment.
During the inventive method is applicable to, low-grade difficulty is selected oolitic hematite sorting, adopts the inventive method, and the rate of recovery of gained bloodstone can be not less than 90%, and concentrate grade can be not less than 52%.
As better scheme, ore grinding is sized mixing in step when the mass fraction of solids of gained ore pulp is 10～15%, sedimentation desliming, and flocculant consumption is 20～100 grams of/ton of raw ores.This mass fraction of solids makes ore pulp system lower to dispersant dispersibility or consumption requirement, reduce dispersant and the impact of flocculant consumption on mineral surface current potential thereby further improve, bloodstone flocculating setting efficiency, the rate of recovery and recovery gained concentrate grade are better.
As better scheme, the mass fraction of solids of rough concentrate ore pulp is 10～15%, and when secondary settlement desliming, the consumption of flocculant is 10～50 grams of/ton of raw ores.
As better scheme, described dispersant comprises that consumption is that sodium carbonate and the consumption of 100～500 grams of/ton of raw ores is the sodium metasilicate of 100～1000 grams of/ton of raw ores.The composite dispersant dispersibility of sodium carbonate and sodium metasilicate is better, can under lower consumption, make mineral reach abundant dispersity; Generally speaking, when pulp density is lower, dispersant dosage also can correspondingly reduce, sodium carbonate amount is that 100g/ ton raw ore and sodium metasilicate consumption are that 100g/ ton raw ore, ore pulp mass fraction are while being 15%, in ore pulp, contained bloodstone suspended substance can reach the state of abundant dispersion substantially, while improving dispersant dosage, can make mineral grain dispersion effect better, for the present invention, sodium carbonate amount is no more than 500g/ ton raw ore and sodium metasilicate consumption is no more than in 1000g/ ton raw ore situation, all can realize object of the present invention.
As better scheme, step 3. in after coarse concentrate regrinding, fineness accounts for 90～95% of the contained ore gross weight of rough concentrate lower than the ore content of 0.074mm.Further fine grinding can make bloodstone monomer dissociation degree better, improves the rate of recovery of bloodstone.
As better scheme, sodium carbonate amount is 500 grams of/ton of raw ores, and sodium metasilicate consumption is 800 grams of/ton of raw ores.
As better scheme, when a sedimentation desliming, flocculant consumption is 50 grams of/ton of raw ores, and when secondary settlement desliming, flocculant consumption is 20 grams of/ton of raw ores.
beneficial effect of the present invention:
In sum, the invention provides a kind of oolitic hematite flocculant, its preparation method is simple, and condition is easily controlled, product with stable quality, can selective absorption bloodstone and adsorption capacity stronger, but to sludge substantially without absorption; During for oolitic hematite selective flocculation (agglomerate) sedimentation desliming, to mash acid alkalinity without harsh requirement, can under lower consumption condition, obtain better bloodstone agglomerate mass settlement and desliming effect, the full iron recovery of sorting gained concentrate and grade are all comparatively excellent; Compared with prior art, under other technological parameter same cases, adopt flocculant of the present invention can make the full iron recovery of gained concentrate improve 5～20%, full iron grade improves 5～10%.
The present invention also provides a kind of oolitic hematite selectively to disperse agglomerate method for separating simultaneously, technique is simple, and mog requires low, and owing to having adopted flocculant provided by the invention, being able within a short period of time fine bloodstone mineral can be by efficient mass settlement, and full iron recovery is protected; Meanwhile, because flocculant possesses stronger adsorption capacity, dispersant is weakened on the impact of flocculating effect, even if dispersant dosage is higher, flocculant consumption of the present invention also can be significantly less than the flocculant use amount of prior art; The inventive method has overcome the deficiency that existing flocculation process need to carry out under high alkalinity condition, is a kind of technique that can carry out under low alkalinity or ore pulp nature pH condition, light to the corrosivity harm of equipment; Difficulty low-grade during the method is applicable to, microfine embedding step is selected oolitic hematite sorting, adopts the inventive method, and the rate of recovery of gained bloodstone can be not less than 90%, and concentrate grade can be not less than 52%.
The specific embodiment
Below in conjunction with the specific embodiment, the present invention is described in further detail.
One, prepare flocculant, as follows operation:
A, CMS, acrylic acid, initator, crosslinking agent are mixed with deionized water, obtain mixed material;
Temperature to 70～90 ℃ of b, rising mixed material, and be incubated 3 ~ 6 hours under stirring condition, must contain the flocculant of CMS and PAA graft;
C, primary purification: to described mixed system carry out suction filtration, washing after in vacuum drying oven 50 ℃ of left and right be dried to constant weight, obtain crude product;
D, secondary purify: crude product is mixed with methyl alcohol and carry out Soxhlet extracting, then vacuum drying extracting gained solid, to constant weight, obtains required flocculant, the methyl starch that described flocculant is purifying and PAA graft at not higher than 60 ℃ of temperature.
Two, detect the percent grafting of CMS and PAA graft copolymer
Method is: the percent grafting that calculates its CMS and PAA graft copolymer by formula (1).
(1) percent grafting: (M
1-M
o)/M
o× 100%, wherein, M
othe quality of CMS, M
1it is the quality of graft copolymer after purifying.
Three, select viscosimetry to measure the molecular weight of graft copolymer, its cardinal principle is the feature viscosity (η) by the sodium chloride weak solution of Ubbelohde viscosity measurement graft copolymer, then calculates its molecular weight by feature viscosity (η) and the relational expression (2) of molecular weight (M):
(2) M=802×[η]
1.25
Embodiment 1
Prepare flocculant by above-mentioned steps, wherein:
In step a, each amounts of components is respectively CMS 10% by weight percentage, acrylic acid 50%, initator 0.5%, crosslinking agent 0.01%, deionized water 39.49%; The mixed material temperature to 70 ℃ that raises in step b, is incubated 3 hours; In steps d, when Soxhlet extracting, crude product and methyl alcohol weight ratio are 2.5, and the extracting time is 24 h, finally obtains flocculant product.
The percent grafting that calculates product is 75.25%, and the molecular weight of graft copolymer is 6.45 × 10
5.
Embodiment 2
Operate by embodiment 1 step, difference is: the percentage by weight that mixed material is deionized water 29.15% by CMS 30%, acrylic acid 40%, initator 1.0%, crosslinking agent 0.05% and surplus mixes, rising mixed material temperature to 80 ℃, is incubated 4 hours.
The percent grafting that finally calculates product is 84.30%, and the molecular weight of graft copolymer is 1.749 × 10
6.
Embodiment 3
Operate by embodiment 1 step, difference is: mixed material is by CMS 35%, acrylic acid 40%, initator 2.0%, crosslinking agent 0.1% and surplus are that the percentage by weight of deionized water 22.90% mixes, and rising mixed material temperature to 90 ℃ is incubated 6 hours.
The percent grafting that calculates product by formula (1) is 92.45%, and the molecular weight that calculates graft copolymer by formula (2) is 2.639 × 10
6.
Two, oolitic hematite is selectively disperseed to agglomerate sorting:
Embodiment 4
1, raw ore source: Yichang oolitic hematite stone, TFe content is 48.12wt%; SiO
2content is 13.22wt%;
2, taking be milled to-0.074mm(of 1000g ore is that granularity is less than 0.074mm) mineral aggregate account for the 85wt% of raw ore gross weight, in grinding process, additional proportion is that the sodium metasilicate of 100g/ton raw ore and ratio are that sodium carbonate and the raw ore of 100g/ ton raw ore grinds altogether;
3, get ore grinding gained material, adding water sizes mixing, and to make the contained mass fraction of solids of ore pulp be 15%, stirs 5min bloodstone suspended substance is fully disperseed in ore pulp after sizing mixing;
4, a sedimentation desliming: add the prepared flocculant of embodiment 1 in ore pulp, flocculant consumption is 80g/ ton, and after mixing, standing sedimentation to mineral syrup liquid no longer declines, and then siphon removes upper strata suspension, obtains rough concentrate;
5, secondary settlement desliming: rough concentrate is returned after regrinding and sized mixing, obtain rough concentrate ore pulp, in the ratio of 1 gram of/ton of raw ore to after adding the made flocculant of embodiment 1 in rough concentrate ore pulp and mixing, standing sedimentation to mineral syrup liquid no longer declines, then siphon removes upper strata suspension, obtains concentrate.Recording its productive rate is 77%, TFe grade 55.25wt%, and the TFe rate of recovery is 88.41%.
Embodiment 5
1, Hunan Ningxiang oolitic hematite stone, raw ore TFe content is 43.26wt%, SiO
2content is 20.38wt%;
2, taking be milled to-0.074mm(of 1000g ore is that granularity is less than 0.074mm) mineral aggregate account for the 90wt% of raw ore gross weight, in grinding process, add the sodium metasilicate of 500g/ton raw ore and sodium carbonate and the raw ore of 1000g/ ton raw ore to grind altogether;
3, get ore grinding gained material, adding water sizes mixing, and to make the contained mass fraction of solids of ore pulp be 15%, stirs 5min bloodstone suspended substance is fully disperseed in ore pulp after sizing mixing;
4, in ore pulp, add the prepared flocculant of embodiment 3, flocculant consumption is 100g/ ton raw ore, and after mixing, then mixed ore pulp described in high intensity magnetic separation, obtains magnetic material and non-magnetic separation material; Magnetic material described in flotation, the mode of flotation is that described magnetic material is carried out to reverse flotation, when reverse flotation, in ore pulp, add the starch (starch is as valuable mineral inhibitor) of 300 grams of/ton of raw ore consumptions and the enuatrol (enuatrol is as collecting agent in reverse floatation) of 100 grams of/ton of raw ore consumptions, all the other technological parameters are with reference to prior art, obtain flotation froth and floatation underflow, described floatation underflow is iron ore concentrate.
Recording iron ore concentrate productive rate is 60.35%, TFe grade 57.42wt%, and the TFe rate of recovery is 80.10%.
Embodiment 6
The present embodiment operates with reference to embodiment 4, and difference is:
In step 2: ore grinding degree is the 80wt% that mineral aggregate that granularity is less than 0.074mm accounts for raw ore gross weight, adds the sodium metasilicate of 500g/ton raw ore and sodium carbonate and the raw ore of 300g/ ton raw ore to grind altogether when ore grinding in grinding process; In step 3, the contained mass fraction of solids of ore pulp is 20%; The flocculant that adds embodiment 3 to prepare in step 4; Flocculant consumption is 20g/ ton; In step 5, add the made flocculant of embodiment 3, flocculant consumption is 10g/ ton raw ore.
The present embodiment gained concentrate yield is 75.12%, TFe grade 55.11wt%, and the TFe rate of recovery is 86.03%.
Embodiment 7
The present embodiment operates with reference to embodiment 4, and difference is:
In step 2: ore grinding degree is the 70wt% that mineral aggregate that granularity is less than 0.074mm accounts for raw ore gross weight, adds the sodium metasilicate of 200g/ton raw ore and sodium carbonate and the raw ore of 300g/ ton raw ore to grind altogether when ore grinding in grinding process; In step 3, the contained mass fraction of solids of ore pulp is 10%; The flocculant that adds embodiment 2 to prepare in step 4; Flocculant consumption is 50g/ ton; In step 5, add the made flocculant of embodiment 3, flocculant consumption is 20g/ ton raw ore.
The present embodiment gained concentrate yield is 76.05%, TFe grade 55.03wt%, and the TFe rate of recovery is 86.97%.
Finally it should be noted that; above embodiment is only unrestricted for technical scheme of the present invention is described; although technical scheme of the present invention is had been described in detail with reference to preferred embodiment; those skilled in the art are to be understood that; can modify or be equal to replacement technical scheme of the present invention; and not departing from aim of the present invention and scope, it all should be encompassed in the middle of protection scope of the present invention.
Claims (9)
1. an oolitic hematite flocculant, is characterized in that: be to adopt following steps to make:
A, get CMS, PAA, initator, crosslinking agent and deionized water and mix, obtain mixed material, in mixed material, the percentage by weight of each component is respectively: CMS 10～20%, PAA 50～60%, initator 0.5～2%, crosslinking agent 0.01～0.1%, surplus is deionized water;
Temperature to 70～90 ℃ of b, rising mixed material, are incubated 3～6 hours under stirring condition, must contain the mixed system of CMS and PAA graft;
C, primary purification: to described mixed system carry out suction filtration, washing after in vacuum drying oven 50～70 ℃ be dried to constant weight, obtain crude product;
D, secondary are purified: crude product is mixed with methyl alcohol and at least 20h of Soxhlet extracting, then at not higher than 60 ℃ of temperature the solid of vacuum drying extracting gained to constant weight, the CMS and the PAA graft that obtain purifying, described purifying graft is required flocculant; When Soxhlet extracting, the weight ratio of methyl alcohol and crude product is not less than 2.
2. oolitic hematite flocculant according to claim 1, is characterized in that: described initator is persulfate, and described crosslinking agent is epoxychloropropane or glycerine.
3. oolitic hematite flocculant according to claim 1 and 2, is characterized in that: the molecular weight of described graft is 1 × 10
3～1 × 10
7.
4. utilize the flocculant described in any one in claim 1-3 to carry out the method that oolitic hematite selectively disperses agglomerate sorting, it is characterized in that: comprise the steps:
1. ore grinding is sized mixing: oolitic hematite raw ore and dispersant are ground to the ore content that makes fineness be less than 0.074mm altogether and account for 70～90% of raw ore weight, then add water and size mixing, obtain ore pulp;
2. a sedimentation desliming: after adding described flocculant in ore pulp and mixing, standing sedimentation to mineral syrup liquid no longer declines, then separates upper strata suspension with lower floor ore pulp, obtain rough concentrate;
3. secondary settlement desliming: rough concentrate is returned after regrinding and sized mixing, obtain rough concentrate ore pulp, in the ratio of 1～20 gram of/ton of raw ore to after adding described flocculant in rough concentrate ore pulp and mixing, standing sedimentation to mineral syrup liquid no longer declines, then upper strata suspension is separated with lower floor ore pulp, obtain concentrate.
5. oolitic hematite according to claim 4 selectively disperses agglomerate method for separating, it is characterized in that: ore grinding is sized mixing in step when the mass fraction of solids of gained ore pulp is 10～15%, sedimentation desliming, and flocculant consumption is 20～100 grams of/ton of raw ores.
6. oolitic hematite according to claim 5 selectively disperses agglomerate method for separating, it is characterized in that: described dispersant comprises that consumption is that sodium carbonate and the consumption of 100～500 grams of/ton of raw ores is the sodium metasilicate of 100～1000 grams of/ton of raw ores.
7. oolitic hematite according to claim 6 selectively disperses agglomerate method for separating, it is characterized in that: step 3. in after coarse concentrate regrinding, fineness accounts for 90～95% of the contained ore gross weight of rough concentrate lower than the ore content of 0.074mm.
8. oolitic hematite according to claim 7 selectively disperses agglomerate method for separating, it is characterized in that: sodium carbonate amount is 500 grams of/ton of raw ores, and sodium metasilicate consumption is 800 grams of/ton of raw ores.
9. oolitic hematite according to claim 8 selectively disperses agglomerate method for separating, it is characterized in that: when a sedimentation desliming, flocculant consumption is 50 grams of/ton of raw ores, and when secondary settlement desliming, flocculant consumption is 20 grams of/ton of raw ores.
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| CN104190549A (en) * | 2014-09-03 | 2014-12-10 | 鞍钢集团矿业公司 | Composite inhibitor for reverse flotation of hematite |
| CN104998763B (en) * | 2015-08-17 | 2017-04-12 | 华北理工大学 | Determining method for flocculating flotation granularity of micro-fine particle inbuilt hematite ores |
| CN105536979A (en) * | 2015-12-16 | 2016-05-04 | 陈均宁 | Method for extracting micro-fine-particle iron ore concentrate from tailings obtained after primary iron separation |
| CN106238218B (en) * | 2016-08-09 | 2019-03-29 | 鞍钢集团矿业有限公司 | A kind of filter aid and preparation method thereof being separated by solid-liquid separation for hematite concentrates |
| CN109290072B (en) * | 2018-09-27 | 2021-04-27 | 山东理工大学 | Selective flocculation-desliming method for spodumene ores |
| CN112774869B (en) * | 2020-12-25 | 2022-09-16 | 厦门紫金矿冶技术有限公司 | Pyrite inhibitor, preparation thereof and application thereof in copper-lead-zinc multi-metal sulfide ores |
| CN113713968A (en) * | 2021-08-30 | 2021-11-30 | 东北大学 | In-situ online characterization method for structural characteristics of micro-fine particle iron mineral aggregate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274945A (en) * | 1979-11-07 | 1981-06-23 | American Cyanamid Company | Iron ore beneficiation by selective flocculation |
| CN101270179A (en) * | 2008-04-30 | 2008-09-24 | 东北师范大学 | Process for synthesizing modified starch series polymeric flocculant |
| CN101439316A (en) * | 2008-11-27 | 2009-05-27 | 中南大学 | Selective flocculation desiliconisation method against low aluminum silicon ratio bauxite |
| CN102250291A (en) * | 2011-05-25 | 2011-11-23 | 何善媛 | Ampholytic modified grafted starch flocculant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274945A (en) * | 1979-11-07 | 1981-06-23 | American Cyanamid Company | Iron ore beneficiation by selective flocculation |
| CN101270179A (en) * | 2008-04-30 | 2008-09-24 | 东北师范大学 | Process for synthesizing modified starch series polymeric flocculant |
| CN101439316A (en) * | 2008-11-27 | 2009-05-27 | 中南大学 | Selective flocculation desiliconisation method against low aluminum silicon ratio bauxite |
| CN102250291A (en) * | 2011-05-25 | 2011-11-23 | 何善媛 | Ampholytic modified grafted starch flocculant |
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