CN108579988A - A method of extracting feldspar concentrate using desert drift-sand - Google Patents

A method of extracting feldspar concentrate using desert drift-sand Download PDF

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CN108579988A
CN108579988A CN201810321399.1A CN201810321399A CN108579988A CN 108579988 A CN108579988 A CN 108579988A CN 201810321399 A CN201810321399 A CN 201810321399A CN 108579988 A CN108579988 A CN 108579988A
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sand
drift
concentrate
feldspar
iron
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CN108579988B (en
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陈述明
王杨
陈留慧
李绍元
杨朝晖
赵吉成
辛明印
张晓帆
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Liaoning Bandung R & D Co Ltd Changsha Branch
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Liaoning Bandung R & D Co Ltd Changsha Branch
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/113Silicon oxides; Hydrates thereof
    • C01B33/12Silica; Hydrates thereof, e.g. lepidoic silicic acid

Abstract

The invention discloses a kind of methods for extracting feldspar concentrate using desert drift-sand, the described method comprises the following steps:(1) screening analysis and microscopy are carried out to drift-sand, determines screening fineness range, drift-sand is sieved, and undersized product is entered into classifying equipoment, obtains coarse component;(2) coarse component of acquisition is fed into high frequency fine screen, then by coarse grain on classifying screen it is concentrated after feed shaping grinding machine carry out ore grinding;(3) ore pulp of milled is subjected to strong magnetic using magnetic separator and removes iron;(4) to strong magnetic except the concentrate after iron carries out desliming;(5) to the pH value of acid adjustment ore pulp of the concentrate after desliming, amine collector is added and carries out flotation removal of impurities;(6) mineral after flotation removal of impurities carry out feldspar flotation, product, that is, feldspar concentrate.Preparation method is simple by the present invention, at low cost, and the feldspar concentrate quality being prepared is high.

Description

A method of extracting feldspar concentrate using desert drift-sand
Technical field
The invention belongs to ore processing fields, and in particular to a method of extracting feldspar concentrate using desert drift-sand.
Background technology
Drift-sand is the sand bed that by wind and accumulation is got off, be desert occupy oasis, Desert Expansion tentacle.In order to delay The step of Desert Expansion, mitigates desertification hazard, and people often take the sand prevention such as planting trees and grass, Sand-fixing Measures.In recent years, with Industrialize sand control, the industrialization proposition of sand concept, the new measure that recycling drift-sand is increasingly becoming sand prevention, fixes the sand. It is had been successful currently, doing roadbed material using drift-sand, the relevant technologies have been obtained for promoting and applying.If fully sharp With desert drift-sand resource and ore dressing processing is carried out to it, then precondition is able to remove by reasonably dropping iron, drop aluminium etc. Miscellaneous technological process, the content of iron, titanium and aluminium effectively in reduction desert drift-sand, can be only achieved wanting substantially for glass industry in this way It asks, a kind of novel Mineral resource is provided for industrial utilization.
Being used for the method that ore dressing removes iron (titanium) in the prior art has magnetic method, gravity separation method, Removal of iron with flotation, acidleach except iron, surpasses Sound wave removes iron etc. except iron and microorganism, but single ore dressing method for removing iron all has respective defect and deficiency.Such as acidleach Except iron is not dissolved in sour (except hydrofluoric acid) using quartzy (feldspar), iron-containing impure mineral is dissolved by acid, and iron is removed to realize Purpose;The common acid of the acid-hatching of young eggs has sulfuric acid, hydrochloric acid, nitric acid, but acid consumption is costly, and environmental pollution is big, as people's environmental protection is anticipated The enhancing of knowledge, application range are increasingly restricted.The high-frequency that for another example ultrasonic wave is mainly propagated by medium except iron (20000 hertz) sound wave generates many compressions, expansion area when ultrasonic wave conducts in the solution, forms numerous bubbles, gas The formation and rupture (cavitation phenomenon) of bubble, liquid internal pressure mutate, to which with shock wave, (pressure is up to thousands of to several Ten thousand atmospheric pressure), under the action of this shock wave, be adhered to the iron-bearing mineral of particle surface from particle surface split away off into Enter liquid phase, to achieve the purpose that remove iron, but ultrasonic wave iron removal technology is relative complex, and cost is higher.Microorganism is to utilize except iron The microorganisms such as black-koji mould carry out leaching to Surface Fe, can be used for the film iron or dip dyeing iron of leaching particle surface, but remove iron Less efficient, effect also needs to be further increased.Therefore, how to combine and optimize it is existing remove iron (titanium) method, and had Effect is used in the ore-dressing technique of desert drift-sand, this becomes a prerequisite property condition for restricting the desert drift-sand utilization of resources. Iron (titanium) problem is removed to desert drift-sand in addition to above-mentioned, the sorting for finally also relating to quartz and feldspar in the drift-sand of desert is asked Topic, can this be the final deciding factor that utilize quartz mine and feldspar ore in the drift-sand of desert.Domestic mainly use is floated at present It selects partition method to detach quartz and feldspar, specifically includes hydrogen fluoride, free-floride has acid system and free-floride is without three kinds of methods of acid system.
CN101870474A provides a kind of method with separating and preparing quartz sand concentrate from wind-laid sand in desert, floride-free can select Mine, but wherein many indissoluble substances are difficult to remove, cost is still excessively high.CN101885489B offers are a kind of to utilize desert aeolian accumulation The method that husky ore dressing prepares feldspar powder concentrate is directly carried out removing iron using electromagnetism intensity magnetic separator, is easy to cause iron in bulky grain It can not remove, it is difficult to practical operation.Therefore, it is necessary to one kind simply to gear to actual circumstances, and essence is extracted efficiently from the drift-sand of desert The method of mine.
Invention content
The object of the present invention is to provide a kind of methods for extracting feldspar concentrate using desert drift-sand, utilize mineral physics Matter, carries out fine graded first, throws tail, removes and most of is difficult to the impurity removed in common process;Secondly it is ground using shaping Machine carries out shaping ore grinding to coarse grain drift-sand, under conditions of ensureing mog, preferably ensure that quartz and feldspar particle Microscopic appearance;It is removed first using method for floating again in remaining mineral and is difficult to the silicate removed, carbonate impurities, then The flotation for carrying out feldspar again, can thus obtain the feldspar product of high-quality, extract remaining product after feldspar, all mixed It shares and reclaims in soil.
In order to solve the above technical problems, the present invention uses following technical scheme:
A method of feldspar concentrate being extracted using desert drift-sand, the described method comprises the following steps:(1) to drift-sand Screening analysis and microscopy are carried out, the mesh number of screen size is determined, drift-sand is sieved, and undersized product is entered into classifying equipoment, Obtain coarse component;(2) coarse component of acquisition is fed into high frequency fine screen, then by coarse grain on classifying screen it is concentrated after feed it is whole Shape grinding machine carries out ore grinding;(3) ore pulp of milled is subjected to strong magnetic using magnetic separator and removes iron, carried out a roughing one and scan strong magnetic twice Except iron;(4) to strong magnetic except the concentrate after iron carries out desliming;(5) to the pH value of acid adjustment ore pulp of the concentrate after desliming, amine is added Class collecting agent carries out flotation removal of impurities, and floatation process is that a roughing two is scanned;(6) mineral after flotation removal of impurities are added HF and are adjusted And activation, amine collector is added and carries out feldspar flotation, technique is one roughing, roughing product, that is, feldspar concentrate.
Further, drift-sand is crossed into 0.3-0.6mm sieves in step 1, screens out grass roots, leaf impurity, secondly by the lower production of sieve Object enters classifying equipoment, screens out most of 0.1mm or so fine grained impurity, and the grass roots leaf impurity and fine fraction screened out is direct Be backfilling into former husky position, give over to soil reclaim it is spare.
Further, in step 2, high frequency fine screen feeds concentration 10-20%, and it is miscellaneous to screen out the remaining particulates of 0.1mm or so Matter, the ore grinding form closed circuit grinding system using long cylindrical ball mill and high frequency fine screen, and mog is less than 200 purposes Granule content is 50-70%.
Further, strong magnetic described in step 3 removes iron and uses vertical ring high-gradient magnetic separator, the pulp density of the milled fed In 10-20%, magnetic field intensity is in 0.9-1.2T.
Further, desliming described in step 4 removes 0.04mm thin muds below, and underflow density is in 30-40% after desliming.
Further, the dilute sulfuric acid that acid described in step 5 is 5%-15%, adjusts the pH value of ore pulp between 2-3, dosage In 1000-3000g/t.
Further, amine collector described in step 5 is mixed amine, and roughing dosage sweeps a dosage and exist in 70-150g/t 35-75g/t sweeps two dosages in 20-40g/t.
Further, the Fe of the mineral after the removal of impurities of flotation described in step 62O3Content is less than 0.1%.
Further, the dosage that HF is added in step 6 is 300-1000g/t, adjusts the pH value of ore pulp between 2-3, adds Enter amine collector and carry out feldspar flotation, roughing mixed amine dosage is in 20-100g/t.
Further, the K of the feldspar concentrate2O grades are more than 8%, Na2O grades are more than 2%, Fe2O3Content is less than 0.1%, TiO2Content is less than 0.02%.
Because drift-sand is carried by stream and formed, for various mineral due to hardness difference, size distribution is extremely uneven It is even, so being sieved first to drift-sand.The present invention by screen analysis find, SiO2Grade is dropped with attenuating for fineness It is low, K2O grades are increased with the reduction of fineness, SiO in -100 mesh drift-sands2Content has decreased to 80% or less.Reason may Be quartz be used as essential mineral, content is 70% or more, because quartzy hardness is larger, worn in dust storm handling process it is smaller, Coarse grain is enriched with;For feldspar content 30% or more, these hardness of minerals are smaller, and abrasion is larger, are enriched in particulate.Through reflecting under microscope Fixed, X-ray diffraction analysis and scanning electron microscope analysis comprehensive study show that the mineral composition type of ore is complex, transparent mine Object is based on quartz, and followed by potassium feldspar, plagioclase, a small amount of clayey, sand formation cuttings, sericite, other trace quantity minerals are still shown in green curtain Stone, chlorite and hornblend etc..Metalliferous mineral is mainly magnetic iron ore, and bloodstone, secondary is pyrite and limonite, this is also mineral The middle melanocratic mineral or magnetic mineral for needing to remove.Potassium feldspar grain size is 0.01~0.7mm, plagioclase grain size be 0.01~ 0.8mm, quartzy grain size are 0.01~0.7mm.Magnetic iron ore, bloodstone, limonite, pyrite, clayey and sericite etc. other Impurity grain size is substantially in 0.1mm or less.So to extract more high-grade feldspar and quartz, it should divide first drift-sand Grade throws tail.Classification throws tail fineness in 0.1-0.4mm.It takes and partly carries out feldspar and quartzy extraction on the sieve of 0.1-0.4mm, under sieve Part is used for Reclaimed Soil.
The technological process of the present invention is that the screening analysis of desert drift-sand and microscopy-classification throw tail-shaping ore grinding-by force The technique that magnetic is purified except iron-desliming-flotation removal clay class impurity-feldspar flotation-quartz, it is specific as follows:
1) drift-sand is crossed into 0.3-0.6mm sieves first, screens out the impurity such as grass roots, leaf.Secondly undersized product is entered and is divided Grade equipment, screens out most of 0.1mm or so fine grained impurity.The grass roots leaf impurity and fine fraction screened out is directly backfilling into original Husky position, give over to soil reclaim it is spare.
2) coarse component of above-mentioned acquisition is fed into high frequency fine screen, feeds concentration 10-20%, screen out 0.1mm or so residues Particulate impurity.Then by coarse grain on classifying screen it is concentrated after feed shaping grinding machine carry out ore grinding, ore milling concentration 60-70%, mill Ore mining long cylindrical ball mill and high frequency fine screen form closed circuit grinding system, can more accurately ensure feldspar and quartz products in this way Fineness, and can guarantee particle appearance pattern.Ore grinding makes various mineral reach monomer dissociation, is convenient for subsequent sorting, mog In -200 mesh 50-70%.
3) iron tramp is feldspar and the most important impurity of quartz, so by the ore pulp of milled, concentration is fed in 10-20% Vertical ring high-gradient magnetic separator carries out strong magnetic and removes iron, and magnetic field intensity is in 0.9-1.2T.Remove the iron mineral of relatively high magnetism, such as red iron Mine, limonite etc..Strong magnetic, which carries out a roughing one, to be scanned and removes iron twice, except still containing some iron tramp, this portion in concentrate after iron Iron is divided to pass through subsequent desliming and floatation process removal.
4) to strong magnetic except the concentrate of iron carries out desliming, the impurity such as removal silicates such as part particulate carbonate and clay class. Remove 0.04mm thin muds below.
5) underflow density carries out flotation to the underflow product after desliming, removes remaining carbonate in 30-40% after desliming And silicate impurity adjusts the pH value of ore pulp between 2-3, dosage adds in 1000-3000g/t with the dilute sulfuric acid of 5%-15% Enter the flotation that amine collector carries out impurity, technique is that a roughing two is scanned, roughing amine collector dosage in 70-150g/t, A dosage is swept in 35-75g/t, sweeps two dosages in 20-40g/t.
6) Fe in the mineral after flotation removal of impurities2O3Content is less than 0.1%, can carry out feldspar flotation.Flotation is firstly added HF, as regulator and activator, dosage 300-1000g/t, the pH value of ore pulp between 2-3, be added amine collector into The flotation of row feldspar, technique are one roughing, and roughing amine collector dosage is in 20-100g/t, roughing product, that is, feldspar concentrate.
The feldspar concentrate quality floatingly selected, K2O grades are more than 8%, Na2O grades are more than 2%, Fe2O3Content is less than 0.1%, TiO2Content is less than 0.02%, meets glass and the above standard of ceramics feldspar raw material certified products.
The invention has the advantages that:
The present invention provides a kind of methods for extracting feldspar concentrate using desert drift-sand, first using mineral physics property It first carries out fine graded, throws tail, remove and most of be difficult to the impurity removed in common process;Secondly using shaping grinding machine to thick Grain drift-sand carries out shaping ore grinding, under conditions of ensureing mog, preferably ensure that quartzy and feldspar particle microcosmic Pattern;It is removed first using method for floating again in remaining mineral and is difficult to the silicate removed, carbonate impurities, then carried out again The flotation of feldspar, can thus obtain the feldspar product of high-quality, extract remaining product after feldspar, be all mixed for Soil is reclaimed, and reduces chemical levels simultaneously, reduces production cost.
Description of the drawings
Fig. 1 is the process flow chart using desert drift-sand comprehensive utilization technique route map.
Fig. 2 is that the X-ray diffraction (XRD) of Inner Mongol drift-sand TS composite samples analyzes collection of illustrative plates.
Specific implementation mode
For ease of more fully understanding the present invention, it is illustrated by the following examples, these examples belong to the protection of the present invention Range, but do not limit the scope of the invention.
Drift-sand is sieved first, by taking Tengger desert as an example, screening result such as table 1:
1 Tengger desert drift-sand screen experiments result (%) of table
As it can be seen from table 1 SiO2Grade is reduced with attenuating for fineness, K2O grades rise with the reduction of fineness Height, SiO in -100 mesh drift-sands2Content has decreased to 80% or less.To find out its cause, quartz is used as essential mineral, content to exist 70% or more, because quartzy hardness is larger, worn in dust storm handling process it is smaller, coarse grain be enriched with;Feldspar content 30% with On, these hardness of minerals are smaller, and abrasion is larger, are enriched in particulate.
Show the composition mine of drift-sand through micro- lens-belowed identifying, X-ray diffraction analysis and scanning electron microscope analysis comprehensive study Species are complex, and transparent mineral is based on quartz, followed by potassium feldspar, plagioclase, a small amount of clayey, sand formation cuttings, sericite, Other trace quantity minerals are still shown in allochite, chlorite and hornblend etc..Metalliferous mineral is mainly magnetic iron ore, and bloodstone is secondary for yellow iron Mine and limonite, this is also the melanocratic mineral or magnetic mineral for needing to remove in mineral.Potassium feldspar grain size be 0.01~0.7mm, Plagioclase grain size is 0.01~0.8mm, and quartzy grain size is 0.01~0.7mm.Magnetic iron ore, limonite, pyrite, glues bloodstone Soil property and sericite and other impurities grain size are substantially in 0.1mm or less.So to extract more high-grade feldspar and quartz, it should Classification is carried out to drift-sand first and throws tail.Classification throws tail fineness in 0.1-0.4mm.It takes and is partly grown on the sieve of 0.1-0.4mm The extraction of stone and quartz, lower part of screen point are used for Reclaimed Soil.
Embodiment 1
(1) screening analysis and microscopy are carried out to drift-sand first, determines that screening fineness is 0.1-0.4mm, by drift-sand mistake 0.5mm is sieved, and screens out the impurity such as grass roots, leaf.Secondly undersized product is entered into classifying equipoment, it is thin screens out most of 0.1mm or so Granule foreign.The grass roots leaf impurity and fine fraction screened out is directly backfilling into former husky position, give over to soil reclaim it is spare.
(2) coarse component by above-mentioned acquisition feeds high frequency fine screen, feeds concentration 15%, it is remaining to screen out 0.1mm or so Particulate impurity.Then by coarse grain on classifying screen it is concentrated after feed shaping grinding machine carry out ore grinding, ore milling concentration 65%, ore grinding use Long cylindrical ball mill and high frequency fine screen form closed circuit grinding system, can more accurately ensure feldspar and quartz products fineness in this way, It can guarantee particle appearance pattern again.Ore grinding makes various mineral reach monomer dissociation, be convenient for subsequent sorting, mog less than The granule content of 200 mesh is 50-70%
(3) iron tramp is feldspar and the most important impurity of quartz, so by the ore pulp of milled, concentration feeds vertical ring 15% High gradient magnetic separator carries out strong magnetic and removes iron, and magnetic field intensity is in 1.0T.Remove the iron mineral of relatively high magnetism, such as bloodstone, brown iron Mine etc..Strong magnetic carries out a roughing one and scans twice except iron, and except some ferrosilite is still contained in concentrate after iron, this part iron will lead to Cross subsequent desliming and floatation process removal.
(4) to strong magnetic except the concentrate of iron carries out desliming, the impurity such as removal silicates such as part particulate carbonate and clay class. Remove 0.04mm thin muds below.
(5) underflow density carries out flotation 35% to the underflow product after desliming after desliming, remove remaining carbonate and Silicate impurity adjusts the pH value of ore pulp between 2-3 with 10% dilute sulfuric acid, and mixing is added in 1000-3000g/t in dosage Amine carries out the flotation of impurity, and technique is that a roughing two is scanned, and roughing mixed amine dosage is swept a dosage in 55g/t, swept in 100g/t Two dosages are in 30g/t.
(6) Fe in the mineral after flotation removal of impurities2O3Content is less than 0.1%, can carry out feldspar flotation.Flotation is firstly added HF, as regulator and activator, dosage 300-1000g/t, the pH value of ore pulp is added mixed amine and is grown between 2-3 The flotation of stone, technique are one roughing, and roughing mixed amine dosage is in 60g/t, roughing product, that is, feldspar concentrate.
Embodiment 2
(1) screening analysis and microscopy are carried out to drift-sand first, determines that screening fineness is 0.1-0.4mm, by drift-sand mistake 0.3mm is sieved, and screens out the impurity such as grass roots, leaf.Secondly undersized product is entered into classifying equipoment, it is thin screens out most of 0.1mm or so Granule foreign.The grass roots leaf impurity and fine fraction screened out is directly backfilling into former husky position, give over to soil reclaim it is spare.
(2) coarse component by above-mentioned acquisition feeds high frequency fine screen, feeds concentration 20%, it is remaining to screen out 0.1mm or so Particulate impurity.Then by coarse grain on classifying screen it is concentrated after feed shaping grinding machine carry out ore grinding, ore milling concentration 60%, ore grinding use Long cylindrical ball mill and high frequency fine screen form closed circuit grinding system, can more accurately ensure feldspar and quartz products fineness in this way, It can guarantee particle appearance pattern again.Ore grinding makes various mineral reach monomer dissociation, is convenient for subsequent sorting, mog is -200 Mesh 50-70%
(3) iron tramp is feldspar and the most important impurity of quartz, so by the ore pulp of milled, concentration is fed vertical 10% Disk high gradient magnetic separator carries out strong magnetic and removes iron, and magnetic field intensity is in 0.9T.The iron mineral of relatively high magnetism is removed, such as bloodstone, brown Iron ore etc..Strong magnetic carries out a roughing one and scans twice except iron, and except some ferrosilite is still contained in concentrate after iron, this part iron is wanted It is removed by subsequent desliming and floatation process.
(4) to strong magnetic except the concentrate of iron carries out desliming, the impurity such as removal silicates such as part particulate carbonate and clay class. Remove 0.04mm thin muds below.
(5) underflow density carries out flotation 40% to the underflow product after desliming after desliming, remove remaining carbonate and Silicate impurity adjusts the pH value of ore pulp between 2-3 with 5% dilute sulfuric acid, and mixed amine is added in 1000-3000g/t in dosage The flotation of impurity is carried out, technique is that a roughing two is scanned, and roughing mixed amine dosage sweeps a dosage in 35g/t, sweep two in 150g/t Dosage is in 40g/t.
(6) Fe in the mineral after flotation removal of impurities2O3Content is less than 0.1%, can carry out feldspar flotation.Flotation is firstly added HF, as regulator and activator, dosage 300-1000g/t, the pH value of ore pulp is added mixed amine and is grown between 2-3 The flotation of stone, technique are one roughing, and roughing mixed amine dosage is in 20g/t, roughing product, that is, feldspar concentrate.
Embodiment 3
(1) screening analysis and microscopy are carried out to drift-sand first, determines that screening fineness is 0.1-0.4mm, by drift-sand mistake 0.6mm is sieved, and screens out the impurity such as grass roots, leaf.Secondly undersized product is entered into classifying equipoment, it is thin screens out most of 0.1mm or so Granule foreign.The grass roots leaf impurity and fine fraction screened out is directly backfilling into former husky position, give over to soil reclaim it is spare.
(2) coarse component by above-mentioned acquisition feeds high frequency fine screen, feeds concentration 10%, it is remaining to screen out 0.1mm or so Particulate impurity.Then by coarse grain on classifying screen it is concentrated after feed shaping grinding machine carry out ore grinding, ore milling concentration 70%, ore grinding use Long cylindrical ball mill and high frequency fine screen form closed circuit grinding system, can more accurately ensure feldspar and quartz products fineness in this way, It can guarantee particle appearance pattern again.Ore grinding makes various mineral reach monomer dissociation, be convenient for subsequent sorting, mog less than The granule content of 200 mesh is 50-70%
(3) iron tramp is feldspar and the most important impurity of quartz, so by the ore pulp of milled, concentration feeds vertical ring 10% High gradient magnetic separator carries out strong magnetic and removes iron, and magnetic field intensity is in 1.2T.Remove the iron mineral of relatively high magnetism, such as bloodstone, brown iron Mine etc..Strong magnetic carries out a roughing one and scans twice except iron, and except some ferrosilite is still contained in concentrate after iron, this part iron will lead to Cross subsequent desliming and floatation process removal.
(4) to strong magnetic except the concentrate of iron carries out desliming, the impurity such as removal silicates such as part particulate carbonate and clay class. Remove 0.04mm thin muds below.
(5) underflow density carries out flotation 40% to the underflow product after desliming after desliming, remove remaining carbonate and Silicate impurity adjusts the pH value of ore pulp between 2-3 with 15% dilute sulfuric acid, and mixing is added in 1000-3000g/t in dosage Amine carries out the flotation of impurity, and technique is that a roughing two is scanned, and roughing mixed amine dosage is swept a dosage in 75g/t, swept in 70g/t Two dosages are in 20g/t.
(6) Fe in the mineral after flotation removal of impurities2O3Content is less than 0.1%, can carry out feldspar flotation.Flotation is firstly added HF, as regulator and activator, dosage 300-1000g/t, the pH value of ore pulp is added mixed amine and is grown between 2-3 The flotation of stone, technique are one roughing, and roughing mixed amine dosage is in 100g/t, roughing product, that is, feldspar concentrate.
Comparative example 1
It is essentially identical with the preparation process of embodiment 1, have the gas flow sizing machine the difference is that in preparing without step 1 only Throw tail.
Comparative example 2
It is essentially identical with the preparation process of embodiment 1, have the desliming the difference is that in preparing without step 4 only.
Comparative example 3
It is essentially identical with the preparation process of embodiment 1, it has only the difference is that cleaning without the flotation of step 5 in preparing.
Taste and impurity content test are carried out to feldspar concentrate made from embodiment 1-3 and comparative example 1-3, as a result such as following table It is shown.
Table 2
As seen from the above table:The present invention provides a kind of methods for extracting feldspar concentrate using desert drift-sand, utilize mineral Physical property, carries out fine graded first, throws tail, remove it is most of the impurity removed is difficult in common process, secondly utilize Method for floating removes in remaining mineral and is difficult to the silicate removed, carbonate impurities first, then carries out the flotation of feldspar again, this Sample can obtain the feldspar product of high-quality.
The above content is it cannot be assumed that present invention specific implementation is confined to these explanations, for the technical field of the invention Those of ordinary skill for, under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all answers When being considered as belonging to present invention scope of patent protection determined by the appended claims.

Claims (11)

1. a kind of method for extracting feldspar concentrate using desert drift-sand, the described method comprises the following steps:(1) to drift-sand into Row screening analysis and microscopy determine screening fineness range, drift-sand are sieved, and undersized product is entered classifying equipoment, obtained Coarse component;(2) coarse component of acquisition is fed into high frequency fine screen, then by coarse grain on classifying screen it is concentrated after feed shaping mill Machine carries out ore grinding;(3) ore pulp of milled is subjected to strong magnetic using magnetic separator and removes iron, one roughing one of progress is scanned strong magnetic twice and removed Iron;(4) to strong magnetic except the concentrate after iron carries out desliming;(5) to the pH value of acid adjustment ore pulp of the concentrate after desliming, amine is added Collecting agent carries out flotation removal of impurities, and floatation process is that a roughing two is scanned;(6) flotation removal of impurities after mineral be added HF be adjusted and Activation is added amine collector and carries out feldspar flotation, and technique is one roughing, roughing product, that is, feldspar concentrate.
2. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step Drift-sand is crossed into 0.3-0.6mm sieves in 1, screens out grass roots, leaf impurity, undersized product is secondly entered into classifying equipoment, is screened out big Part 0.1mm or so fine grained impurity, the grass roots leaf impurity and fine fraction screened out are directly backfilling into former husky position, give over to soil Earth is reclaimed spare.
3. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step In 2, high frequency fine screen feeds concentration 10-20%, screens out the remaining particulate impurity of 0.1mm or so, and the ore grinding uses long cartridge type Ball mill and high frequency fine screen form closed circuit grinding system, and the granule content that mog is less than 200 mesh is 50-70%.
4. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step Strong magnetic described in 3 uses vertical ring high-gradient magnetic separator except iron, and in 10-20%, magnetic field intensity exists the pulp density of the milled fed 0.9-1.2T。
5. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step Desliming described in 4 removes 0.04mm thin muds below, and underflow density is in 30-40% after desliming.
6. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step Acid described in 5 is the dilute sulfuric acid of 5%-15%, adjusts the pH value of ore pulp between 2-3, dosage is in 1000-3000g/t.
7. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step Amine collector described in 5 is mixed amine, and roughing dosage sweeps a dosage in 35-75g/t, sweep two dosages and exist in 70-150g/t 20-40g/t。
8. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step The Fe of mineral after the removal of impurities of flotation described in 62O3Content is less than 0.1%.
9. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that step The dosage that HF is added in 6 is 300-1000g/t, adjusts the pH value of ore pulp between 2-3, and it is floating that amine collector progress feldspar is added Choosing, roughing mixed amine dosage is in 20-100g/t.
10. a kind of method for extracting feldspar concentrate using desert drift-sand according to claim 1, which is characterized in that institute State the K of feldspar concentrate2O grades are more than 8%, Na2O grades are more than 2%, Fe2O3Content is less than 0.1%, TiO2Content is less than 0.02%.
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CN1765521A (en) * 2005-09-16 2006-05-03 黄强 Method for separating feldspar and quartz from silica sand
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