CN103495506B - A kind of medicament for iron ore reverse flotation and combinationally use method - Google Patents
A kind of medicament for iron ore reverse flotation and combinationally use method Download PDFInfo
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Abstract
The invention provides a kind of medicament for iron ore reverse flotation and combinationally use method, be made up of pH adjusting agent NaOH, desorbing agent, inhibitor causticity cornstarch, activator calcium oxide and fatty acid collecting agent, it is characterized in that, desorbing agent is made up of following raw material components by weight: waterglass 40 ~ 42 parts, carboxymethyl cellulose 4 ~ 6 parts and polycarboxylate 7 ~ 9 parts.During use, first respectively each raw material components of described part by weight is dissolved, then mixes, add water make by mass concentration be 0.04 ~ 0.06% desorbing agent solution.Desorbing agent is applied in the reverse floatation process that a thick essence three sweeps, adopt stage agent addition mode, in the original reverse floatation process of obvious enhancing, inhibitor is to the selective inhibitory of iron mineral, and collecting agent is selective, reduce tailings grade, improve metal recovery rate, reduce finely-divided metal and run off, realize reduction of discharging and increase production and improve productivity, improving resource utilization, providing new approach for improving microfine iron ore reverse flotation technical indicator.
Description
Technical field
The invention belongs to technical field of mineral processing, relate to medicament and the using method thereof of iron ore flotation.Especially relate to a kind of medicament for iron ore reverse flotation and combinationally use method.
Background technology
China's iron ore deposit has " poor ", " carefully ", the feature of " mixing ", the lean hematite proportion of complicated difficult choosing is larger, for rational exploitation and utilization iron ore deposit, improve the level of resources utilization, numerous dressers author for many years, around carry iron fall general labourer do carried out many explorations, achieve great successes, during "the 10th five-years", the research of Anshan type lean hematite ore mineral processing technology obtains important breakthrough, classical " stage (continuously) ore grinding, thickness grading, gravity treatment, magnetic separation-anion reverse floatation technique " obtain large-scale application, production and technical indication is reached the international leading level, greatly promote China's lean hematite ore technique of preparing progress, facilitate reasonable development and the utilization of Anshan type lean hematite ore resource.
But, along with mine is reduced increasingly to deep mining and stock number, the poor thin hydridization degree of ore obviously increases, for ore deposit condition more for harsh, mill selects difficulty to strengthen gradually, a particulate poor iron ore beneficiation production technology difficult problem highlights day by day, technique is subject to baptism to ore properties adaptability, especially along with grinding particle size attenuates, production and technical indication reduces, anion reverse floatation is as the key operation of technique upgrading, while guarantee product quality, tailings grade constantly raises, the tailings grade of whole flow process is raised, metal recovery rate is lower, cause a large amount of metal loss, occur that in floatation process, inhibitor is not strong to iron mineral selective inhibitory, and collecting agent is selective not high, the problem that particulate iron mineral metal recovery rate is low.
For improving the poor floatation of iron ore technical indicator of particulate, domestic dresser author does a lot of work around the performance and using method improving floating agent.Method is combinationally used about iron ore reverse flotation medicament, what the combinationally using in method of Chinese patent CN01117501.X iron ore anion reverse floatation agent related to a kind of iron ore anion reverse floatation agent combinationally uses method, it fine grinding is reached the iron ore that basic monomer dissociates, the ore pulp of furnishing suitable concentration, first add adjusting agent NaOH to stir, add the cornstarch after inhibitor saponification and then to stir, and then in ore pulp, add the stirring of activator calcium oxide, finally add collecting agent fully to stir, its flotation collector adopts the industrial oleic acid after saponification, and four kinds of pharmaceutical agent combinations use.Although combinationally using of four kinds of medicaments reduces cost, improve sorting result, still there is the technical barrier that microfine iron ore metal flow is weightless, flotation tailing is of high grade.
Chinese patent ZL200910144351.9, a kind of iron ore anion reverse flotation desulfurizing and silicon reducing agent combinationally use method, what relate to a kind of iron ore anion reverse flotation desulfurizing and silicon reducing agent combinationally uses method, it fine grinding is reached the iron ore that basic monomer dissociates, choosing is closed through magnetic separation or magnetic reconnection, obtain iron ore rough concentrate, to the rough concentrate obtained, adopt anion reverse flotation desulfurizing and silicon reducing, its medicament kind and consumption, be calculated as to ore deposit dry basis by flotation: ethyl xanthate 80-100g/t, NaOH 950-1150g/t, starch 450-600g/t, calcium oxide 320-420g/t, anion reverse floatation collecting agent 600-750g/t.The method while iron ore carries Fe and reducing Si, can remove objectionable impurities sulphur in iron ore concentrate, but, also there is iron mineral inhibitory action in above-mentioned technique not enough, and collecting agent selective not high, the not strong problem of specific aim is sorted to Ultra-fine iron minerals.
Summary of the invention
The object of this invention is to provide a kind of medicament for iron ore reverse flotation.
The stage agent addition that another object of the present invention is to provide a kind of medicament for iron ore reverse flotation combinationally uses method.
According to the medicament for iron ore reverse flotation of the present invention, be made up of pH adjusting agent NaOH, desorbing agent, inhibitor causticity cornstarch, activator calcium oxide and fatty acid collecting agent, it is characterized in that, desorbing agent is made up of following raw material components by weight:
Waterglass 40 ~ 42 parts, carboxymethyl cellulose 4 ~ 6 parts, polycarboxylate 7 ~ 9 parts,
Modulus of water glass is 1 ~ 2, carboxymethyl cellulose viscosity 800-1200mPas, substitution value >=0.9, polycarboxylate molecular weight 3000 ~ 4000, solid content 40%,
During use, first respectively each raw material components of described part by weight is dissolved, then mixes, add water make by mass concentration be 0.04 ~ 0.06% the application of desorbing agent solution.
Described waterglass is molecular formula is Na
2siO
3sodium silicate aqueous solution.
Fatty acid collecting agent refers to commercially available KS series collecting agent in reverse floatation, comprises the KS that the patent No. is 201010574922
iI, KS
iII, KS
iVtype collecting agent, commercially available enuatrol collecting agent or commercially available RA715 collecting agent.Or other type can adapt to the collecting agent of the selection of the gangue minerals such as quartz and silicate.
Described enuatrol, molecular formula is C
18h
33o
2na, has another name called oleate soap, octadecanoid acid sodium or odium stearate.
Described RA715, being the second generation product of RA series collecting agent, is be raw material by chemical by-product (i.e. organic carboxyl acid class and fraction fatty acid mixt), reacts through chlorination etc. the minor official fatty acid anion collecting agent in reverse floatation of one obtained.
Method is combinationally used according to the stage agent addition for iron ore reverse flotation medicament of the present invention, by the iron ore being finely ground to basic monomer and dissociating, through single magnetic separation, the iron rough concentrate product that magnetic heavy or heavy magnetic associating sorting process obtains, the reverse flotation work carrying Fe and reducing Si that an one thick essence three sweeps is carried out to iron rough concentrate, it is characterized in that added medicament kind is in reverse flotation work: pH adjusting agent NaOH, desorbing agent, inhibitor causticity cornstarch, activator calcium oxide and fatty acid collecting agent five kinds of medicaments, and adopt following stage agent addition to combinationally use method:
1) by the ore pulp of above-mentioned iron rough concentrate furnishing weight concentration 40 ~ 45%, in the stage of roughly selecting, first pH adjusting agent NaOH is added, make slurry pH reach 11.5 ~ 12, then add desorbing agent, then add inhibitor causticity cornstarch, activator calcium oxide is added again afterwards in ore pulp, finally add fatty acid collecting agent, the ore pulp after fully stirring sends into flotation device, feeds rough floatation operation;
2) the rough floatation concentrate of rough floatation operation feeds cleaner flotation operation, in rough floatation concentrate, activator calcium oxide and fatty acid collecting agent is added in cleaner flotation operation, the concentrate of cleaner flotation operation is final flotation concentrate, and the mine tailing of cleaner flotation operation turns back to rough floatation operation;
3) the rough floatation mine tailing of rough floatation operation feeds three sections and scans sorting operation, first add inhibitor causticity cornstarch to rough floatation mine tailing to carry out one section and scan operation, one section of mine tailing scanned adds inhibitor causticity cornstarch again and feeds two sections and scan operation, two sections of mine tailings scanned feed three sections and scan operation, and each section of concentrate scanning operation returns leading portion operation successively; Three sections are scanned mine tailing is final flotation tailing;
Wherein, desorbing agent is same as above.
Not strong to iron mineral selective inhibitory for the inhibitor existed in existing floatation process, and the selective not high problem of collecting agent, the present inventor have employed desorbing agent first, and desorbing agent is used with the collecting agent of zwitterion active group and other three kinds of pharmaceutical agent combinations, for the technical barrier of solution microfine iron ore metal flow weightlessness provides feasible approach.
The present inventor have employed desorption technology first in floatation process, desorbing agent is introduced in dosing process, waterglass wherein and carboxymethyl cellulose, bloodstone and quartz particles surface electrostatic repulsive force are increased, enhance the dispersion of ore particle, reduce the adhesion of fine grained at large particle surface, the subparticle of agglomerated spreads out simultaneously, the moon has stopped phase inter coagulation between fine mineral and the absorption of particulate iron mineral on coarse grain gangue surface, form the ore pulp system of stable dispersion, for inhibitor, to the selective inhibitory of iron mineral and collecting agent, the selective trapping to gangue minerals such as quartz provides favourable separation condition, thus microfine iron ore reverse flotation technical indicator can be improved, reduce tailings grade, improve metal recovery rate,
Carboxyl in polycarboxylate carbochain wherein, can strengthen the hydrophily of iron mineral particle, improves iron mineral particle further, and especially fine iron ore thing particle is by the degree selecting to suppress, and the iron ore antifloating rate of recovery is further enhanced.
The reverse floatation process that the present invention adopts a thick essence three to sweep and stage agent addition mode, the benefit of stage agent addition is, makes medicament act on ore particle better, improves medicament result of use.
The present invention is used for the using method of iron ore reverse flotation medicament, obviously can improve microfine difficulty and select lean hematite ore anion reverse floatation technical indicator, make floatation process more reasonable efficient, reduce flotation tailing grade, improve metal recovery rate, reduce finely-divided metal to run off, improve resource utilization.New approach is provided for improving microfine lean hematite ore reverse flotation technical indicator.
Accompanying drawing explanation
Fig. 1 is iron ore rough concentrate product reverse flotation stage agent addition process chart of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, method of the present invention is further described.
As shown in Fig. 1 and embodiment 1 ~ 4:
Medicament for iron ore reverse flotation of the present invention, comprises pH adjusting agent NaOH, desorbing agent, inhibitor causticity cornstarch, activator calcium oxide and fatty acid collecting agent,
Described desorbing agent is made up of following raw material components by weight:
Waterglass 40 parts, carboxymethyl cellulose 5 parts, polycarboxylate 8 parts;
Modulus of water glass is wherein 1 ~ 2, carboxymethyl cellulose viscosity 800-1200mPas, substitution value >=0.9, polycarboxylate molecular weight 3000 ~ 4000, solid content 40%;
Preparation method and use amount: dissolve by each raw material components of desorbing agent of described part by weight first respectively, then mix, add water be mixed with by mass concentration be 0.04 ~ 0.06% desorbing agent solution.Best test application compound concentration 0.05%, consumption 500 ~ 560g/t float to.
In test, according to the fatty acid collecting agent that ore properties is selected, refer to the KS III type collecting agent in commercially available KS series collecting agent.
Test sample ore is that domestic Anshan type difficulty selects particulate lean hematite ore.Former mineral facies and Chemical bath deposition the results are shown in Table 1, table 2.
Table 1 raw ore material phase analysis result (%)
Table 2 raw ore chemistry multielement analysis result (%)
Element | TFe | FeO | SiO 2 | S | P | MnO | CaO | MgO | Al 2O 3 | Loss on ignition |
Content | 33.75 | 3.32 | 47.25 | 0.16 | 0.044 | 0.14 | 0.42 | 0.62 | 0.66 | 1.85 |
The analysis result of table 1 shows that raw ore mineral composition is based on hematite-limonite, distributive law is 71.11%, next is magnetic iron ore, and distributive law is 19.11%, and illusion, half martite account for 4.59%, ferric carbonate accounts for 2.81%, ferrosilite accounts for 2.37%, belongs to the acid drift of high silicon poor iron low calcium and magnesium aluminium, needs impurity mainly SiO2, Al2O3 of removing, main existence form is quartz, the silicate mineral etc. of calcite, ankerite and iron content.
Fine grinding is reached the lean hematite ore that basic monomer dissociates, adopt two sections of Continuous Grindings, thickness grading, middling ore regrinding, gravity treatment-magnetic separation-anion reverse floatation flow process to sort, its particulate ore milling product, thickness grading overflow, granularity-0.074mm content 92.58%.The mixing magnetic separation iron rough concentrate of grade 44.35% is obtained, granularity-0.074mm content 92.42%, granularity-0.010mm, content 39.49% through weak magnetic, high-intensity magnetic separation.
By the ore pulp of above-mentioned mixed magnet rough concentrate furnishing weight concentration 40 ~ 45%, adopt one section to roughly select, one section of selected, three sections of flotation operation scanned, in rough floatation operation, first add pH adjusting agent NaOH makes slurry pH reach 11.5 ~ 12, then desorbing agent is added, add inhibitor causticity cornstarch again, in ore pulp, add activator calcium oxide more afterwards, finally add KS III type collecting agent, the ore pulp after fully stirring is sent into flotation device and is carried out rough floatation sorting operation;
The rough floatation concentrate of rough floatation operation feeds cleaner flotation operation, in rough floatation concentrate, activator calcium oxide and KS III type collecting agent is added in cleaner flotation operation, the concentrate of cleaner flotation operation is final flotation concentrate, and the mine tailing of cleaner flotation operation turns back to rough floatation operation;
The rough floatation mine tailing of rough floatation operation feeds three sections and scans sorting operation, first add inhibitor causticity cornstarch to rough floatation mine tailing to carry out one section and scan operation, one section of mine tailing scanned adds inhibitor causticity cornstarch again and feeds two sections and scan operation, two sections of mine tailings scanned feed three industry, and each section of concentrate scanning operation returns leading portion operation successively; Three sections are scanned mine tailing is final flotation tailing;
Test under the agentia condition that each embodiment is different, for ease of comparing, carried out the comparative example test not adding desorbing agent, result of the test is in table 3 simultaneously.
Table 3 is contrast table result
As seen from the above table, compared with conventional flotation test index, adopt embodiment method under the prerequisite that final concentrate Iron grade is suitable, iron recovery improves 5.36 ~ 7.52%, Iron Grade of Tailings reduces by 3.1 ~ 4.47%, illustrate that embodiment method can reduce Iron Grade of Tailings effectively, improve concentrate iron recovery.
The using method of the medicament for iron ore reverse flotation of the present invention, inhibitory action and the collecting agent that obviously can strengthen iron mineral in original floatation process are selective, reduce flotation tailing grade, improve metal recovery rate, reduce finely-divided metal to run off, realization reduction of discharging is increased production and improved productivity, and improves resource utilization, provides new way for improving microfine lean hematite ore reverse flotation technical indicator.
Claims (2)
1., for a medicament for iron ore reverse flotation, be made up of pH adjusting agent NaOH, desorbing agent, inhibitor causticity cornstarch, activator calcium oxide and fatty acid collecting agent, it is characterized in that,
Desorbing agent is made up of following raw material components by weight:
Waterglass 40 ~ 42 parts, carboxymethyl cellulose 4 ~ 6 parts and polycarboxylate 7 ~ 9 parts,
Modulus of water glass is 1 ~ 2, carboxymethyl cellulose viscosity 800-1200mPas, substitution value >=0.9, polycarboxylate molecular weight 3000 ~ 4000, solid content 40%,
During use, first respectively each raw material components of described weight portion is dissolved, then mixes, add water make by mass concentration be 0.04 ~ 0.06% the application of desorbing agent solution.
2. one kind combinationally uses method for iron ore reverse flotation medicament, by the iron ore being finely ground to basic monomer and dissociating, through single magnetic separation, magnetic heavy or heavy magnetic associating sorting process, obtain iron rough concentrate product, the reverse flotation work carrying Fe and reducing Si that an one thick essence three sweeps is carried out to iron rough concentrate, it is characterized in that, in reverse flotation work, added medicament kind is: pH adjusting agent NaOH, desorbing agent, inhibitor causticity cornstarch, activator calcium oxide and fatty acid collecting agent five kinds of medicaments, and adopts following stage agent addition to combinationally use method:
1) by the ore pulp of above-mentioned iron rough concentrate furnishing weight concentration 40 ~ 45%, in the stage of roughly selecting, first pH adjusting agent NaOH is added, make slurry pH reach 11.5 ~ 12, then add desorbing agent, then add inhibitor causticity cornstarch, activator calcium oxide is added again afterwards in ore pulp, finally add fatty acid collecting agent, the ore pulp after fully stirring sends into flotation device, feeds rough floatation operation;
2) the rough floatation concentrate of rough floatation operation feeds cleaner flotation operation, in cleaner flotation operation, in rough floatation concentrate, add activator calcium oxide and fatty acid collecting agent, the concentrate of cleaner flotation operation is final flotation concentrate, and the mine tailing of cleaner flotation operation turns back to rough floatation operation;
3) the rough floatation mine tailing of rough floatation operation, feed three sections and scan sorting operation, first to rough floatation mine tailing, add inhibitor causticity cornstarch, carry out one section and scan operation, one section of mine tailing scanned, then add inhibitor causticity cornstarch, feed two sections and scan operation, two sections of mine tailings scanned, feed three sections and scan operation, each section of concentrate scanning operation, returns leading portion operation successively; Scanning mine tailing for three sections, is final flotation tailing;
Wherein, described desorbing agent is with the desorbing agent of claim 1.
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |