CN1110631A - Separation method of low- and middle-grade infusorial earth ore - Google Patents

Abstract

The separation process of low- and middle-grade infusorial earth ore features mechanical rubbing, flushing, and vibration washing four times for separating fine earth impurities, addition of disperser for keeping said impurities suspending, and use of shallow pool for depositing sand and deep pool for depositing ore. Its advantages include good dispersion effect, no damage to infusorial earth texture and low cost.

Description

Separation method of low- and middle-grade infusorial earth ore

Diatomite ore is the accumulation mineral of diatom plant suction in ancient times silicon housing, is a kind of porous aqueous silicon dioxide material, and raw ore is many and clay, quartz sand and other foreign material are mixed gives birth to, and its product has several one hundred kind of industrial use.Be used for high-grade diatomaceous earth products, require its contained other amount of impurities that strict restriction is arranged as filter powder (filter aid), high-grade filler, catalyst carrier etc.Consumption along with resource, the high-grade mineral resources that can directly use can not satisfy the demands, therefore, provide from low, reach the product of the smart soil of diatomite that conforms with quality in the grade ore deposit soil (refer to main component: silica is lower than 80%, alundum (Al is higher than 9%, di-iron trioxide is higher than 2%) through ore dressing, be the urgent requirement in current market.

In the diatom raw ore, a large amount of granularities at the thin mud impurity below 2 microns attached on one's body the diatom body.These impurity mainly are montomorillonite, illite, mica etc.They form the too high amount of alundum (Al, di-iron trioxide and other harmful components in the raw ore.The key of low, middle grade diatomite ore dressing is exactly these granulometric impurities to be thrown off from the diatom body disperse, and this technology is called dispersing technology.Majority also contains coarse grained quartz sand in the raw ore in addition, and its granularity and proportion are all big than diatom body, and be easy to gravity preparation and remove, not the restriction condition that sorts therefore.

Though now used diatomite beneficiation method is a lot, select method, floatation, dry powder to spray method and the high intensity magnetic separation method etc. selected as chemistry, but because diatomite original ore becomes to be grouped into the situation complexity, the beneficiation method that the ore deposit, different regions adapts to is not quite similar, and said method does not have versatility.And the method beneficiation cost that has is too high or environment is caused serious pollution, and no longer adopts.

At present, more research steerings make in the ore pulp thin mud and diatom body fully disperse with various mechanical means, utilize contained quartz sand in the ore pulp, diatom body different with making a gesture of measuring of particulate impurity again, carry out gravity and sort.This is a kind of low cost, free of contamination physical upgrading method.Which type of mechanical means the critical process of this method is to adopt make thin mud fully disperse to break away from from the diatom body.As for allowing the thin mud that has broken away from diatom in the ore pulp adhere to no longer again, and it is heavy that it is suspended in ore pulp, reaches the purpose of carrying out the gravity treatment classification, and the method for then available adding dispersant reaches.The dispersant kind is a lot, uses cheap sodium metasilicate formulated as base-material usually.

United States Patent (USP) U.S.P.3547260 and U.S.P.3752500 openly cross the mechanical grinding in specific raw ore condition, add that dispersant disperses and with the diatomite dressing method of centrifuge or natural subsidence classification gravity concentration.More than the common drawback of two patents be that all dispersing technology handles simply, thereby patent has strict demand to the original ore soil quality, thus only to some impure amount less, disperse more or less freely ore deposit soil effective.The very thin diatomite ore of the strong and contained sand grains of, impurity attached power low to grade, simple levigate processing does not reach the requirement of abundant dispersion.

The inventive method is to adopt spiral to transport to squeeze broken, low concentration scouring for a long time, desaturation and mechanical treatments such as branch stone, high speed fine grinding and the wash-out mud that shakes at a high speed, the thin mud of the raw ore that contains the many and strong adhesion of thin mud impurity through wipe, dash, the usefulness of bestirring oneself, the multistage dispersing technology that impurity is fully broken away from from diatom.Adopt the shallow ridges sedimentation coarse sand that flows then, adopt and separate shallow pond quiescent settling fine sand, adopt and separate the gravity treatment class settling method that dark pond deposition concentrate and overflow cannot not release heavyly mud and sort.

The purpose of this invention is to provide and carry out gravity classification behind a kind of thin mud impurity that in diatomite ore, fully sheds and sort, reach and sort low, middle grade diatomite ore, and free from environmental pollution, the physical upgrading method that cost is low.

Now, in detail the inventive method is described in detail in conjunction with process chart of the present invention and equipment schematic.

Fig. 1 is mineral processing circuit figure of the present invention.

Fig. 2 squeezes broken machine schematic diagram for spiral transports.

Fig. 3 is swaging machine action principle figure.

Fig. 4 is a swaging machine transmission schematic diagram.

Fig. 5 is desaturation stone-seperating machine action principle figure.

Fig. 6 is the levigate machine action principle of high speed figure.

Fig. 7 washes machine action principle figure for shaking at a high speed.

Fig. 8 is the shallow ridges layout drawing.

Fig. 9 is for separating shallow pond layout drawing.

Figure 10 is for separating dark pond layout drawing.

Among the figure: the 1-spiral transports the broken machine that squeezes; The 2-swaging machine; 3-desaturation stone-seperating machine; 4-high speed atomizer mill; 5-shakes at a high speed and washes machine; The 6-shallow ridges; 7-separates shallow pond; 8-separates dark pond; The 9-spiral transports and squeezes broken dynamo-electric machine-decelerator group; The 10-helical axis; The 11-spiral transports and squeezes broken machine drum body; The 12-extrusion board; 13-draws together the material cutter; The 14-spiral transports and squeezes broken machine feed pipe; 15-swaging machine motor; 16-swaging machine cylinder body; 17-swaging machine belt wheel; The rotating shaft of 18-swaging machine; 19-swaging machine blade; 20-swaging machine dispersant enters pipe; 21-desaturation stone-seperating machine motor; 22-desaturation stone-seperating machine belt wheel; 23-desaturation stone-seperating machine housing; The rotating shaft of 24-desaturation stone-seperating machine; 25-desaturation stone-seperating machine blade; 26-desaturation stone-seperating machine charging aperture; 27-desaturation stone-seperating machine water inlet; 28-desaturation stone-seperating machine plasma discharge mouth; 29-row stone mouth; 30-desaturation stone-seperating machine dispersant inlet tube; 31-high speed atomizer mill motor; 32-moves emery wheel; The quiet emery wheel of 33-; 34-retracts the adjustment screw; 35-advances and adjusts screw thread; 36-high speed atomizer mill charging aperture; 37-high speed atomizer mill discharging opening; 38-shakes at a high speed and washes dynamo-electric motivation; The 39-speed increaser; 40-shakes at a high speed and washes the machine rotating shaft; 41-shakes at a high speed and washes machine cloverleaf blade; 42-shakes at a high speed and washes the machine shell; 43-shakes at a high speed and washes machine inlet capable; 44-shakes at a high speed and washes the machine discharge gate; 45-shallow ridges fixed weir baffle plate; 46-shallow ridges fender plate; 47-separates shallow pond charging valve; 48-separates shallow pond discharging valve; The dark pond charging of 49-valve; 50-is put the mud valve in dark pond.

Technological process of the present invention comprises that altogether sending crowded operation, scouring operation, rareization branch stone operation, fine grinding operation, high speed to shake washes operation, shallow ridges sedimentation coarse sand operation, separates shallow pond sedimentation fine sand operation and separate dark pond sedimentation concentrate operation. Its technological process is:

The raw ore of certain particle size and suitable water drop into spiral and transport and squeeze broken machine 1, carry out squeezing for twice when advancing tin and when extruding and deliver to series connection multi-cylinder swaging machine 2 after broken, hit thin and the long period cleans, and obtain cleaning for the first time dispersion. Raw ore through cleaning becomes a kind of cake shape thing of low concentration, pushes away into rareization stone-seperating machine 3 through tail cylinder discharge mouth. Add water this moment in this machine, the ore deposit cake is evenly mixed hitting mutually and make again diatom be subjected to for the second time cleaning function to the percussion on polygonal tube limit between the high-speed rotational ore pulp. The bigger stone grain that rotates in rare slurry at a high speed simultaneously is subjected to centrifugal action to throw to the machine wall, drops down onto on the machine slanted floor face, stores the row for the treatment of. Rise slurry by the plasma discharge mouth, slurry is delivered to high-speed fine grinding machine 4, the particle of not yet refinement is carried out whole refinements, this moment, all ore pulps all will pass through at a high speed the close gap of two mills, and flow at high speed and scouring effect are cleaned diatom for the third time. Ore pulp is delivered to the machine of washing 5 that shakes at a high speed and is carried out high speed impact vibration washing then. So far through four times washup effect, can obtain to disperse sufficient ore pulp. Ore pulp is delivered in the shallow ridges, flows in long ditch, relies on baffle plate to carry out class settling grain sand. Again ore pulp is delivered to respectively to separate and carry out slightly for a long time quiet heavy fine sand in the shallow pond 7. Deliver to and separate in the dark pond 8 for a long time quiet heavy concentrate having sunk the ore pulp of sand at last. Remaining not hypostasis is thin mud, can collect concentrate after water is emitted.

Now describe with regard to above-mentioned each operation.

1. send crowded operation

Equipment is that spiral transports crowded broken machine 1, is a remodeling type spiral transportation extruder that is suitable for the diatomite characteristic.

Transported by spiral and to squeeze broken dynamo-electric machine-decelerator group 9 and drive its helical axis 10 rotations, raw ore is freely fallen to the ore deposit by the feed port on this machine drum body 11, falls into part and is subjected to the helical axis spiral to promote to advance and can carries out once squeezing broken when entering cylindrical shell.After the ore deposit was pushed to outlet extrusion board 12, a plurality of apertures on the slave plate were subjected to fragmentation once more when extruding.The raw ore that is extruded is subjected to the material cutter 13 of drawing together that plate rotates with the axis outward and draws together broken falling.Water transports crowded broken machine feed pipe 14 from spiral and adds.

For reaching the requirement of technology, this machine and a spiral conveyer difference are: 1. the pitch of Cai Yonging is less, and purpose is that original ore size is transported in control, is convenient to extrude and absorb water fragmentation; 2. the size of its extrusion board opening is decided by rubble maximum gauge contained in the raw ore, reaches only crowded muck piece and does not squeeze the purpose of crushed stone; 3. be provided with in the outer end of extrusion board rotate with the axis draw together the material cutter, the mineral of extruding are drawn together broken falling rapidly.

Operation parameter: concentration should be controlled between 32% to 35% after spiral transported and squeezes broken machine and carry raw ore to add water; The axle rotating speed is controlled between 80 to 100 rev/mins; Transport length within 2 meters the time, every processing do 0.14 ton in ore deposit/time power setting be one kilowatt.The screw diameter of general power number and employing calculates decision by output.

2. scouring operation

Equipment is multi-cylinder type swaging machine 2, and this machine can adopt commercially available washed-out sand swaging machine, its inlet part (connect spiral and transport the broken machine that squeezes), channel size, outlet size and blade is transformed the back use.Since to the diatom raw ore clean have on many structures with scouring to sand and application characteristic on difference, the retrofit work amount is very big, therefore designs and make more reliable voluntarily according to application characteristic.Swaging machine cylinder body 16 quantity should be even number, from advancing ore deposit ordering 1,2,3,4 ..., divide odd number cylinder and even number cylinder.Swaging machine motor 15 drives this machine belt wheel 16 and swaging machine rotating shaft 18 rotations of the blade 19 of multi-disc curl layout is housed.In the odd number cylinder, blade tilt causes the ore deposit cake to move downward with the axle rotation, causes the ore deposit cake to move upward at even number cylinder intra vane inclination angle with the axle rotation.For strengthening ore deposit cake scrubbing action in cylinder, cylinder wall adopts polygonized structure, makes the ore deposit cake do the polytropism motion.

Squeeze the moisture former ore particle that operation obtains and directly enter first cylinder by sending, at first be subjected to the strike refinement once more of blade therein, and the ore deposit cake becomes spiral and moves downward under the blade effect.Utilize the composition of ore deposit cake self at the volley, particularly utilize the hard quartz sand of many fusiformis contained in the ore deposit, carry out scouring, make attached to the thin mud impurity on the diatom body and take off from the diatom body to the diatom body.When the ore deposit cake exported down to first cylinder, part ore deposit cake entered second cylinder from outlet, and the part then barrel outside blade moves upward, and descended by the blade effect, and reciprocation cycle is cleaned.Enter the second cylinder ore deposit cake and be subjected to dihedral vane thrust, promote to move upward, carry out time delay and clean, partly enter the 3rd cylinder during to the exit, part descends along barrel, pushes to reciprocal scouring once more.So to the 3rd cylinder, the 4th cylinder ..., carry out the scrubbing action of long period, make to wipe on cake refinement of most ore deposits and the thin mud impurity diatom body and take off.Require the scouring times to differ to dissimilar raw ores, should be provided with when needing six, eight or more even number clean cylinder.Thin mud is bonded on the diatom body no longer again in order to guarantee to wipe down, enters pipe 20 by the swaging machine dispersant and adds 1/3 to 1/2 of total dispersion dosage.

Operation parameter: first cylinder smashes effect because of bearing to ore particle, so the power power consumption is bigger, every processing do 0.14 ton in ore deposit/time, power setting is one kilowatt; The even number cylinder pushes away the ore deposit cake and moves upward, and power consumption is greater than the odd number cylinder, every processing do 0.16 ton in ore deposit/time, power setting is one kilowatt; The every processing of other odd number cylinder do 0.18 ton in ore deposit/time, power setting is one kilowatt; General power is decided by total treating capacity.Blade diameter is unsuitable excessive, is advisable between 700 millimeters with 500 millimeters, and the excessive blade that requires has big size, otherwise easily causes the change song of blade; Blade outer end linear speed is got between 4 meter per second to 5 meter per seconds; For making the ore deposit cake that the scouring of long period be arranged in machine, blade tilt is little, about desirable 10 degree; The scouring time should not be lower than 20 minutes to the ore deposit cake continuously in machine; Cumulative volume was decided by treating capacity and scouring time (being ore deposit cake elapsed time in machine).

3. desaturation divides the lapicide preface

The desaturation operation is finished by custom-designed stirring-type desaturation stone-seperating machine 3.This machine is only through once being with transmission to slow down, the conventional mixer height of ratio of revolutions, with form except that the desaturation immixture strong agitation and to the percussion on tube limit, reach the flushing purpose of the second time to diatom.Drive the belt wheel 22 that is contained in this machine rotating shaft 24 by desaturation stone-seperating machine motor 21, drive blade 25 rotations in the rotating shaft, blade is parallel to belt wheel and installs.For strengthening the percussion of ore pulp in desaturation stone-seperating machine housing 23, housing is made polygon, to form a plurality of eddy motions.The housing base banking, inclined side has openable row's stone mouth 29, makes at high speed centrifugation to flow and be thrown to debris flow on the limit to row's stone mouth, regularly takes out.Institute comes the ore deposit cake to be entered by desaturation stone-seperating machine charging aperture 26, and water enters from this machine lower water inlet 27, and ore pulp is discharged by middle part plasma discharge mouth 28 on the housing.Will add needed dispersant fully in the desaturation stone-seperating machine, the dispersant inlet tube 30 that is provided with from this machine feeds.

Operation parameter: desaturation concentration is no more than 10% and is as the criterion to remove sedimentation concentration behind the fine sand, and general silicon content is at 60% to 70% raw ore, and desaturation concentration is got between 11% to 12.5%; Blade diameter should be between 600 millimeters to 800 millimeters, and leaf line speed should reach 15 meter per second to 18 meter per seconds; The cylindrical shell ratio of height to diameter was got 1.2: 1, and single volume is unsuitable excessive, generally between 1 to 1.5 cubic metre, can be difficult to realize when excessive on blade design and intensity, can adopt many when the separate unit machine is not enough; Every processing do 0.18 ton in ore deposit/time, power setting is one kilowatt.

4. fine grinding operation

From the ore pulp that the desaturation stone-seperating machine is discharged, the overwhelming majority has become the refinement dispersed, but still has the existence of a small amount of grain, so one fine grinding operation of Ying Zaijia.This operation is except that levigate raw ore, and another effect is to allow ore pulp at a high speed by the narrow crack of mill, to produce scouring desliming once more.Ore pulp gets rid of Xiang Mobi with great centrifugal force simultaneously, and strong percussion takes place, under thin mud impurity is shaken once more or under the mill.Therefore, this operation is actually effective operation of disperseing for the third time.

High speed atomizer mill 4 adopts dress adjustable clearance grinding wheel type grinding machine.Directly drive emery wheel 32 by this electromechanics motivation 31, form with quiet emery wheel 33 pairings and relatively rotate mill.Ore pulp is by charging aperture 36, passes in the quiet emery wheel to enter, and discharged by discharge gate 37.Adjust outside screw 34 can pull to quiet emery wheel by retracting of it, transfer big emery wheel gap.Adjust screw thread 35 by advancing, can turn the emery wheel gap down.Facts have proved, the diatomite ore particle that granulates is levigate do not need the gap be transferred to require to be ground to the size of fineness, only need the gap be transferred to less than 0.1 to 0.2 millimeter of particle diameter (being everlasting between 1 millimeter to 5 millimeters), just can reach wiping and open levigate purpose.Therefore, abrasive disk space should not be transferred too smallly, in order to avoid sand grains that should be levigate is by levigate and increase thin mud impurity.

Operation parameter: emery wheel adopts 200 mm dias, one a moving quiet emery wheel of standard, and moving grinding wheel speed is 2800 rev/mins; The emery wheel gap is generally adjusted between 0.6 to 0.8 millimeter; Every acc power is set to 1.5 kilowatts; Every machine treating capacity is 0.0013 cube of meter per second.Total platform number is decided by total treating capacity.

5. shake at a high speed and wash operation

This operation is realized by the shake machine of washing 5 of miniature high-speed, is a kind of high speed scroll machine of special purpose impeller structure.Handle all refinements of mineral in the ore pulp through above operation, the diatom body has obtained shampooing quite fully, and impure less raw ore is realized disperseing substantially, can enter down the rich technology of classification of sedimentation collection one.But to the ore deposit of inferior quality, still may there be the incomplete situation of disperseing, therefore adds together strong high speed and shake and wash operation, can obtain desirable effect.Wash dynamo-electric motivation 38 by shaking at a high speed and drive speed increaser 39 acceleration.The accelerator output revolving shaft is to shake at a high speed washes machine rotating shaft 40, and cloverleaf blade 41 is equipped with in its lower end.Starch that charging aperture 43 enters below this machine shell 42.Under blade rotation at a high speed, form incoming flow high speed upper punch, blade forms vacuum down rapidly, produces very big vibration and impact, acts on can forming cavitation erosion when strong in machine.These effects make diatom obtain strong vibration and scrub, and thin mud impurity is washed on one's body from diatom very completely.Fully disperse ore pulp to discharge from casing upper part discharge port 44.This machine dispersion effect is splendid, just is difficult to theory quantitatively when design, need carry out the pilot scale typing, and the on-the-spot optimum efficiency rotating speed of setting up of motor frequency modulation speed change gear preferably is set.Machine has at a high speed, should not maximize, and it is 250 millimeters that embodiment has only adopted internal diameter, highly is 350 millimeters type.Because type is little, blade construction is simple, and it is not restraining factors that corrosion is changed.

Operation parameter: blade is 3 blade profile volution blades, and diameter is 150 millimeters; Desirable 3000 rev/mins to the 8400 rev/mins scope of axle rotating speed needs experiment to determine; Single-machine capacity is 2.2 kilowatts, and treating capacity is 0.0008 cube of meter per second.Technology needs multimachine to use side by side, and should have standby host.

6. the heavy coarse sand operation of shallow ridges

Shallow ridges 6 is heavy coarse sand equipment, washes operation from shaking at a high speed and starches and enter shallow ridges, flows in ditch always, is subjected to baffle effect in flowing, and the sand material that sinks to baffle plate is under closed sedimentation, thereby sand-grading is deposited.General long 25 meters to 40 meters of shallow ridges is divided into several sections in total length, every section shallow from being deep to, and 1 to 2 tankage that its capacity is separated shallow pond with the satisfied operation down of outflow ore pulp is as the criterion.Ditch is divided into four sections among the embodiment, and first section dark 150 millimeters, second section dark 100 millimeters, the 3rd section dark 80 millimeters, the 4th section dark 60 millimeters.First section is heavy big granule, and baffle plate 45 is no longer adjusted, and second and third and four sections baffle plates 46 should be heightened with the sand sedimentation.Shallow ridges flow, area are decided by the size of required sand setting amount, answer pilot scale to determine.Set ditch number should be Duoed 1 to 2 than needs ditch number, uses in turn and is convenient to desanding.This sand setting method is simple, and the sedimentation time is short, and production is carried out continuously, and equipment amount is little.

7. separate the heavy fine sand operation in shallow pond

The fine sand sedimentation time is long slightly, and this technology is provided with the shallow pond of the some separations 7(degree of depth and is no more than 150 millimeters) in order to the sedimentation fine sand.The ore pulp that flows out from shallow ridges enters a wherein pond through separating shallow pond charging valve 47, carries out the quiet heavy of long period, and the quiet heavy time is as the criterion to guarantee smart soil property amount by the heavy Bi Erding of fine sand.The back ore pulp that sunk is emitted by separating shallow pond discharging valve 48.During sedimentation, sand grains more carefully needs sedimentation about one hour in shallow pond.Separate shallow pond and recycle, set number was decided by treating capacity and settlement request time.The advantage of this method is to guarantee that sand setting is complete, and the classification that can not cause sand setting once to occur is obscured, and diatom loss simultaneously is less, and the used time is short relatively, the few and utilization rate height of equipment.

8. separate the smart geotechnological preface of dark pond sedimentation

This operation is to sort the rich finishing operation of collection, realizes by separating dark pond 8.The diatom volume is minimum, and static balance time is long.Facts have proved and accelerate the diatom sedimentation, should not make settling tank shallow excessively.Little diatom settles out in the pond, and the heavy stream that begins to form decline needs the suitable time, in diatom body size is ore deposit below 10 microns, almost wants 4 to 5 hours during this period of time.And all be the same to dark pond and shallow pond during this period of time, so, reclaiming the appropriate to the occasion dark settling tank of concentrate.But dark operating difficulties is crossed in the pond, thus also should not be too dark, adopt 650 millimeters comparatively suitable to the 750 millimeter degree of depth.This pond is put mud valve 50 by it and is emitted not heavy thin mud suspension tail slurry by 49 chargings of dark pond charging valve.Sedimentation time decides on the diatom granularity, generally needs about 24 hours.For forming one day recycle, can be depth design circulation in a day, comprising feed time and ore removal time.

An example of the present invention is the dressing process to Tengchong County, Yunnan Province group field diatomite ore.

It is about about 60% that a kind of silt particle type mineral resources, raw ore contain diatom, and granularity is not more than 10 microns, contains fine quartz sand about about 18%, size distribution is bigger, and from 5 microns to 0.5 millimeter, thin mud is about 15%, based on montomorillonite, aluminium content is between 13%-17%, and iron content is between 3%-5%.Raw ore repeatedly sorts with conventional method, does not all reach qualified requirement, after the inventive method choosing, selects the smart soil of diatomite of one-level grade.Implementation method is:

1. raw ore is transported by spiral and squeeze broken machine and send into, this machine pitch is 100 millimeters, and diameter is 200 millimeters, and rotating speed is 100 rev/mins, and concentration adjusts to 32%, is that 15 millimeters the plate hole of extruding is extruded into swaging machine by the aperture.

2. send into 350 rev/mins, 0.4 cubic metre of four cylinder swaging machine of single cylinder cleaned 25 minutes, added 0.5% dispersant simultaneously.

3. the ore deposit cake is sent into the desaturation stone-seperating machine, the unit volume is 1.35 cubic metres, and the outer linear speed of blade is 4 meter per seconds, and concentration adjusts to 11%, adds 0.5% dispersant again.

4. ore pulp is sent into the high speed atomizer mill, and rotating speed is 2840 rev/mins, and grinding wheel diameter is 200 millimeters.

5. ore pulp is sent into to shake at a high speed and is washed machine, and rotating speed is 4500 rev/mins, and the shell internal diameter is 250 millimeters, 150 millimeters of blade diameters, and calculating ore pulp time in machine is 15 seconds.

6. ore pulp enters shallow ridges, divides 4 sections, and every section capacity is 1 cubic metre, and the slurry sand setting is given in continuous-flow.

7. ore pulp enters 150 millimeters shallow ponds, and every tankage is 0.45 cubic metre, feed, discharging and totally one hour quiet heavy time.

8. ore pulp enters dark 700 millimeters deep ponds, and every tankage is 3.5 cubic metres, and quiet heavy 22 hours, 2 hours give the ore deposit and go out the concentrate time, circulation in 24 hours is produced.

Obtain the qualified concentrate containing of 45% to 52% rate of recovery through above technology.

Claims (19)

1, a kind of low, middle grade diatomite ore beneficiation method, after adopting the impurity that adheres on the diatom body in the mechanical means dispersion raw ore, obtain concentrate with the gravitational settling method, it is characterized in that transporting crowded broken machine by spiral transports raw ore, carrying out twice in transporting squeezes broken, and in machine, add water, deliver to swaging machine, clean, for the first time disperse impurity from the diatom body, entering the desaturation stone-seperating machine again adds the water desaturation and separates the bulky grain rubble, and the impurity that the effect of being hit in machine obtains on the diatom body second time disperses, send into the levigate not refinement of high speed atomizer mill particle again, and be subjected to scouring and the impurity that carries out on the diatom body for the third time disperses in machine, sending into shakes at a high speed again washes in the machine brute force and shakes and wash diatom, after making the diatom body obtain the 4th impurity dispersion, send into that shallow ridges continuous-flow classification is heavy removes coarse sand, send into again and separate that shallow pond is heavy removes fine sand, send into dark pond sedimentation concentrate at last.

2, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that transporting crowded broken machine with spiral transports raw ore to swaging machine, this machine can make raw ore the ore deposit be carried out squeezing for twice broken when entering cylindrical shell and when extrusion board is extruded, and the aperture is to be as the criterion greater than rubble full-size contained in the raw ore on the extrusion board.

3, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that transporting the water that adds that squeezes in the broken machine by spiral, to adjust raw ore concentration be 32%-35%.

4, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that it is 80 to 100 rev/mins that spiral transports the revolution speed of screw that squeezes broken machine, every processing do 0.14 ton in ore deposit/time power setting be one kilowatt.

5, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that swaging machine cylinder body quantity is even number, ordering number pushes away the ore deposit cake for odd number cylinder blade tilt and its direction of rotation form and moves downward, and ordering number moves upward for even number cylinder blade tilt and the formation of its direction of rotation push away the ore deposit cake.

6, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that the every processing of swaging machine first cylinder do 0.14 ton in ore deposit/time, power setting is one kilowatt, ordering number be 0.16 ton in the dried ore deposit of the every processing of even number cylinder/time, power setting is one kilowatt, other ordering number be 0.18 ton in the dried ore deposit of the every processing of odd number cylinder/time, power setting is one kilowatt.

7, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that the swaging machine blade diameter between 500 millimeters to 700 millimeters, and blade tilt is about 10 degree, and the outer linear velocity of blade is got between 4 meter per second to 5 meter per seconds.

8, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that ore deposit cake scouring time in swaging machine should not be less than 20 minutes.

9, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that desaturation stone-seperating machine blade diameter should be between 600 millimeters to 800 millimeters, and the outer linear velocity of blade should be between 15 meter per second to 18 meter per seconds.

10, low described in claim 1, middle grade diatomite ore beneficiation method, the bottom that it is characterized in that the desaturation stone-seperating machine is structure banking, and row's stone mouth is set at the minimum position that tilts.

11, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that desaturation stone-seperating machine volume between 1 cubic metre to 1.5 cubic metres, and the ratio of height to diameter of its cylindrical shell is 1.2: 1.

12, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that the every processing of desaturation stone-seperating machine do 0.18 ton in ore deposit/time, power setting is one kilowatt.

13, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that the motor-driven grinding wheel speed of high speed fine grinding should reach 2800 rev/mins, and the unit disposal ability is 0.0013 cube of meter per second, and power setting is 1.5 kilowatts.

14, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that should adjusting to the diatom that opens than required mill in high speed atomizer mill emery wheel gap, to stick into grain graininess little 0.1 millimeter to 0.2 millimeter.

15, low described in claim 1, middle grade diatomite ore beneficiation method, the rotating shaft rotating speed of the machine of washing that it is characterized in that shaking at a high speed is between 3000 rev/mins to 8400 rev/mins.

16, low described in claim 1, middle grade diatomite ore beneficiation method, it is characterized in that shakes at a high speed, and to wash machine unit disposal ability be 0.0008 cube of meter per second, power is for being set to 2.2 kilowatts.

17, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that shallow ridges length between 25 meters to 40 meters, and the degree of depth is no more than 150 millimeters.

18, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that separating shallow tank depth and is no more than 150 millimeters.

19, low described in claim 1, middle grade diatomite ore beneficiation method is characterized in that separating the degree of depth in dark pond between 650 millimeters to 750 millimeters.

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