CN103962214B - A kind of beneficiation combined method method and system of synthetical recovery association iron Phosphate minerals - Google Patents
A kind of beneficiation combined method method and system of synthetical recovery association iron Phosphate minerals Download PDFInfo
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Abstract
The invention belongs to the exploitation of ultralow grade rock resource high-efficiency and associated minerals technical field of comprehensive utilization, be specifically related to a kind of beneficiation combined method method and system of synthetical recovery association iron Phosphate minerals.The beneficiation combined method method of this synthetical recovery association iron Phosphate minerals, comprises the steps: that dry separation goes out fine ore by raw ore successively through three sections, two closed circuit, broken, sieving circuits; By described fine ore through two sections of closed circuit grinding flow processs, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge mine tailing; At 10-15 DEG C, by described mine tailing through one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.Compared with prior art, the magnetic iron ore in the synthetical recovery extremely low-grade association fosfosiderite provided and the scheme of phosphate rock resource, it sorts, and cost is low, efficiency is high, save energy consumption, occupation of land is few, can realize the synthetical recovery of magnetic iron ore and phosphorus ore in the present invention.
Description
Technical field
The invention belongs to the exploitation of ultralow grade rock resource high-efficiency and associated minerals technical field of comprehensive utilization, be specifically related to a kind of beneficiation combined method method and system of synthetical recovery association iron Phosphate minerals.
Background technology
All the time, people to the ore of general iron-holder, by taking " much broken and lessmill " technique to reduce to reduce production cost into the granularity of ore grinding stone, also by " throwing useless in advance " mode after even coarse crushing in small, broken bits before adopting mill, reduce production cost, achieve significant economic benefit.
But the throwing of lump ore and lump ore is given up, mainly for the magnetic iron ore that grade is higher, throw the country rock gangue except carrying secretly in recovery process.For low-ore grade magnetic iron ore, massive ore is thrown and useless a large amount of gangue minerals can not be made fully to throw remove, and is also easily dished out by valuable mineral, is difficult to reach the object significantly reducing production cost.
And phosphate rock floating flow process, conventional phosphate rock floating processing temperature is 37C °, and huge by this condition flotation workshop thermic load consumption, the heating boiler scale of construction of outfit is huge, heating system investment is large, and big energy-consuming, operating cost is high.
So still face processing cost for the technique of preparing of the association fosfosiderite of extremely low-grade now high, energy consumption is high, floor space is large, the shortcoming that the rate of recovery is low.
Summary of the invention
Cost is low, efficiency is high, save energy consumption, occupation of land is few to the object of the present invention is to provide one to sort, and can realize the beneficiation combined method method and system of the association iron Phosphate minerals of the efficient synthetical recovery of iron ore and phosphorus ore.
The object of the present invention is achieved like this, and a kind of beneficiation combined method method of synthetical recovery association iron Phosphate minerals, comprises the steps:
Step 1, by raw ore through three section of two closed circuit crushing screening system, dry separation goes out fine ore;
Step 2, by described fine ore through two section of two closed circuit grinding, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge mine tailing;
Step 3, at 10-15 DEG C, by described mine tailing through one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
For crushing and screening dry separation flow process, for the feature that the selected grade of ore is extremely low, ore handling capacity wants scale, technological process will simplify, mine tailing is thrown as early as possible, so could reduce muck cost, reduce into mill ore amount, reduces ore grinding operating cost.The beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals provided by the invention, adopt by raw ore through three sections, two closed circuit, broken, screening, dry separation technological process, dry separation goes out fine ore; Not only increase like this into abrasive particle level fineness, and achieve much broken and lessmill, reduce the energy consumption in mineral process and other raw materials consumptions to greatest extent, reduce beneficiation cost, improve economic benefit.
And producing in the process of iron ore concentrate with super low-ore grade magnetic iron ore, reducing the process to the extremely low gangue mineral of not iron content or iron content, is the key reducing production cost.Want to reduce the process to priceless mineral, it will be thrown from ore in advance and remove, throwing tail process in advance to ore, is the most important approach realizing above-mentioned reduction production cost.
Adopt dry method throwing tail in small, broken bits sorting process to sub-elect fine ore barren rock and ore in the present invention, the barren rock of dishing out be easy to stack process, processing cost is low, required place and capital expenditure little.
Adopt by described fine ore through two sections of closed circuit grinding flow processs, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge the method for mine tailing, achieve the object of low cost, high efficiency synthetical recovery extremely low-grade iron ore deposit.
Conventional phosphate rock floating processing temperature is 37 DEG C, and huge by this condition flotation workshop thermic load consumption, the heating boiler scale of construction of outfit is huge, heating system investment is large, and big energy-consuming, operating cost is high.10-15 DEG C is adjusted to by flotation operation temperature in this programme, carry out flotation at low temperature, not only do not affect sorting of phosphorus ore, and, compared by overall economics, phosphate rock floating processing temperature is adjusted downward to 10-15 DEG C by 37 DEG C, because reduce the requirement for device systems, decrease investment and energy consumption, significantly improve the rate of recovery of economic benefit.
Further, in step 1, described muck comprises: coarse crushing, in broken and ultrafine grinding;
Wherein, described coarse crushing adopts gyratory crusher to carry out coarse crushing, and broken in described is broken in adopting gyratory crusher to carry out, and described ultrafine grinding adopts high-pressure roller mill to carry out ultrafine grinding.
In order to improve broken efficiency and the fineness of fragmentation, after employing gyratory crusher carries out coarse crushing, broken in preferably adopting gyratory crusher to carry out, adopt high-pressure roller mill to carry out ultrafine grinding afterwards.
Further, in step 1, described three sections, two closed circuit, broken, sieving circuit specifically comprises: one section screening is closed circuit and two sections of screenings are closed circuit;
Wherein said one section screening the closed circuit medium crushing and screening that cries again closed circuit, for, use circular shale shaker screening described in broken after product, its oversize return broken in gyratory crusher after again screening formation closed circuit, undersize enters high-pressure roller mill and carries out in small, broken bits;
Described two sections of screenings are closed circuit cries again grinding and sieving closed circuit dry separation, comprise and use the described rear product in small, broken bits of circular shale shaker screening, wherein oversize return described high-pressure roller mill continue roller mill after carry out again two sections screening form closed circuit, undersize enters floated dry-dressing machine and carries out dry separation.
Product granularity after the crushing efficiency of high-pressure roller mill and fragmentation all compares and has superiority, and can improve grinding capacity, needs the auxiliary material such as steel ball, liner plate used all to decrease, can reduce beneficiation cost.Select high pressure roller mill equipment, adopt the brand-new production technology for low-ore grade magnetic iron ore process and sorting technology equipment simultaneously, reduce the production processing cost of low-ore grade magnetic iron ore significantly.
Further, in step 1, described dry separation goes out fine ore, is specially and uses described floated dry-dressing machine to sub-elect abandoned mine and ore.
Stope Ore Transportation by ore storage bin, carries out coarse crushing through gyratory crusher to disintegrating machine; Ore after coarse crushing is broken product storage bin in belt feeder is delivered to, then through belt feeder be delivered to gyratory crusher carry out in broken; Middle crumble product feeds circular shale shaker again through the belt feeder distribution bin be delivered to before one section of screening and carries out one section of screening; One section of screening oversize broken product storage bin in belt feeder is delivered to, with in broken formation closed circuit; Undersize is transported through transfer station, and be transported to middle storage ore storage bin by belt feeder, then be transported to high pressure roller mill product storage bin by belt feeder, feed the current stabilization storehouse of weighing before high pressure roller mill through belt feeder, the ore of weighing in current stabilization storehouse feeds in high-pressure roller mill; The product of high-pressure roller mill is transported to two sections of screenings by belt feeder, sieves through Double-layer circular vibration screen, and oversize returns product storage bin before high-pressure roller mill mill through transfer station, then forms closed circuit through high-pressure roller mill; Undersize is transported to floated dry-dressing machine through belt feeder and carries out dry separation, and the barren rock after dry separation is transported to refuse bin through belt feeder, and under storehouse, oscillating feeder entrucking is transported to refuse dump; Ore after dry separation is transported through transfer station, is transported to ore grinding storehouse by belt feeder.
Further, in step 2, described two sections of closed circuit grindings are specially:
By classification after described fine ore ball milling, classification sand return turns back to ball mill, and to form one section of ball milling closed circuit, and after classification, overflow enters thick magnetic separation; Thick magnetic concentrate re-uses electromagnetic high frequency vibrating screen and sieves afterwards, and oversize enters Wet-type permanent magnet drum type magnetic separator concentrating, enter after concentrated two sections of ball mills continue ball milling products turn back to electromagnetic high frequency vibrating screen form two sections closed circuit; Undersize enters magnetic separation.
Further, in step 2, described three smart magnetic separation, are specially:
Described undersize enters elutriation magnetic separator selected after carrying out once smart magnetic separation and secondary fine magnetic separation, finally carries out three smart magnetic separation and sends into filter filtration, discharge mine tailing, obtain iron ore concentrate.
Fine ore after dry separation is transported to ore grinding storehouse through belt feeder, be given on the next part barrow band of storehouse by disk feeder, through bringing the primary grinding closed cycle into ball mill and grader composition to barrow, grader sand return returns ball mill, classifier overflow enters thick magnetic separation mine-separating box and feeds magnetic separator, thick magnetic concentrate enters high frequency vibrating screen to pump pond, ore deposit, oversize concentrates after magnetic separator concentrating through Wet-type permanent magnet drum type, enter two sections of ball mills, ore milling product enters high frequency vibrating screen and gets to electromagnetic high frequency vibrating screen through sand pump in the lump to pump pond, ore deposit and thick magnetic concentrate, form secondary grinding closed cycle, undersize enters once smart magnetic separation and gets to once smart magnetic separation to pump pond, ore deposit through sand pump, once the magnetic concentrate of smart magnetic separation flows automatically to secondary fine magnetic separation and carries out magnetic separation, the concentrate of secondary fine magnetic separation through pump and Cemented filling selected to elutriation magnetic separator, enter filter from wash mill iron ore concentrate out to filter, obtain final iron ore concentrate.
Further, in step 3, at 10-15 DEG C, by described mine tailing through one roughing, once purging selection, triple cleaning, floatingly selects in phosphorus concentrate, specifically comprises:
Collector for phosphate rock flotation at lower temperature is added and inhibitor waterglass carries out the collecting of phosphorus concentrate in described smart magnetic tailing;
Wherein, during collecting, the pH value of fixing ore pulp is 9.
Add the collecting that collector for phosphate rock flotation at lower temperature and inhibitor waterglass carry out phosphorus concentrate, the rate of recovery, the concentrate grade of roughly selecting operation can be improved simultaneously and reduce tailings grade.
Further, preferably, described collector for phosphate rock flotation at lower temperature consumption is 1000 grams/ton, and inhibitor waterglass consumption is 800 grams/ton.
Meanwhile, present invention also offers a kind of beneficiation combined method system of synthetical recovery association iron Phosphate minerals, comprising: crushing and screening dry separation system, iron ore concentrate magnetic separation system and phosphorus concentrate floatation system;
Described crushing and screening dry separation system comprises: for coarse crushing gyratory crusher, in broken gyratory crusher, for one section of screening Double-layer circular vibration screen, the undersize after described one section of screening is carried out high-pressure roller mill in small, broken bits further and the Double-layer circular vibration screen closed circuit with its formation, for the floated dry-dressing machine of last dry separation; The said equipment in use, uses according to the order of sequence successively;
Described iron ore concentrate magnetic separation system comprises: wet type grate ball mill, duplex-spiral classifier, magnetic separator, electric and magnetic oscillation vibration sieve, Wet-type permanent magnet drum type concentrate magnetic separator, wet overflow type ball mill, smart magnetic separator, elutriation magnetic separator, filter; The said equipment in use, uses according to the order of sequence successively;
Described phosphorus concentrate floatation system comprises: lamella thickener, Wet-type permanent magnet drum type magnetic separator, tank diameter, flotation device, disk vacuum filter; The said equipment in use, uses according to the order of sequence successively.
Said system service condition is less demanding, and save energy consumption, floor space is little, reduces beneficiation cost dramatically, and the rate of recovery of iron ore concentrate and phosphorus concentrate is high.Select high pressure roller mill equipment, adopt the brand-new production technology for low-ore grade magnetic iron ore process and sorting technology equipment simultaneously, reduce the production processing cost of low-ore grade magnetic iron ore significantly.
Compared with prior art, the magnetic iron ore in the synthetical recovery extremely low-grade association fosfosiderite provided and the scheme of phosphate rock resource, it sorts, and cost is low, efficiency is high, save energy consumption, occupation of land is few, can realize the synthetical recovery of magnetic iron ore and phosphorus ore in the present invention.
Accompanying drawing explanation
Fig. 1 is crushing and screening dry separation flow chart provided by the invention;
Fig. 2 is iron ore concentrate magnetic dressing process figure provided by the invention;
Fig. 3 is phosphorus concentrate flotation flowsheet figure provided by the invention;
Fig. 4 is crushing and screening dry separation system diagram provided by the invention;
Fig. 5 is iron ore concentrate magnetic separation system figure provided by the invention;
Fig. 6 is phosphorus concentrate floatation system figure provided by the invention.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
A beneficiation combined method method for synthetical recovery association iron Phosphate minerals, as shown in Figure 1-Figure 3, comprises the steps:
Step 1, by raw ore through three section of two closed circuit crushing screening system, dry separation goes out fine ore;
Wherein said muck comprises: coarse crushing, in broken and ultrafine grinding;
Wherein, described coarse crushing adopts gyratory crusher to carry out coarse crushing, and broken in described is broken in adopting gyratory crusher to carry out, and described ultrafine grinding adopts high-pressure roller mill to carry out ultrafine grinding.
In order to improve broken efficiency and the fineness of fragmentation, after employing gyratory crusher carries out coarse crushing, broken in preferably adopting gyratory crusher to carry out, adopt high-pressure roller mill to carry out ultrafine grinding afterwards.
Described three sections, two closed circuit, broken, sieving circuit specifically comprises: one section screening is closed circuit and two sections of screenings are closed circuit;
Wherein said one section screening the closed circuit medium crushing and screening that cries again closed circuit, for use circular shale shaker screening described in broken after product, its oversize return broken in gyratory crusher after again screening formation closed circuit, undersize enters high-pressure roller mill and carries out in small, broken bits;
Described two sections of screenings are closed circuit cries again grinding and sieving closed circuit dry separation, comprise and use the described rear product in small, broken bits of circular shale shaker screening, wherein oversize return described high-pressure roller mill continue roller mill after carry out again two sections screening form closed circuit, undersize enters floated dry-dressing machine and carries out dry separation.
Product granularity after the crushing efficiency of high-pressure roller mill and fragmentation all compares and has superiority, and can improve grinding capacity, needs the auxiliary material such as steel ball, liner plate used all to decrease, can reduce beneficiation cost.Select high pressure roller mill equipment, adopt the brand-new production technology for low-ore grade magnetic iron ore process and sorting technology equipment simultaneously, reduce the production processing cost of low-ore grade magnetic iron ore significantly.
Described dry separation goes out fine ore, is specially and uses described floated dry-dressing machine to sub-elect abandoned mine and ore.
Stope Ore Transportation by ore storage bin, carries out coarse crushing through gyratory crusher to disintegrating machine; Ore after coarse crushing is broken product storage bin in belt feeder is delivered to, then through belt feeder be delivered to gyratory crusher carry out in broken; Middle crumble product feeds circular shale shaker again through the belt feeder distribution bin be delivered to before one section of screening and carries out one section of screening; One section of screening oversize broken product storage bin in belt feeder is delivered to, with in broken formation closed circuit; Undersize is transported through transfer station, and be transported to middle storage ore storage bin by belt feeder, then be transported to high pressure roller mill product storage bin by belt feeder, feed the current stabilization storehouse of weighing before high pressure roller mill through belt feeder, the ore of weighing in current stabilization storehouse feeds in high-pressure roller mill; The product of high-pressure roller mill is transported to two sections of screenings by belt feeder, sieves through Double-layer circular vibration screen, and oversize returns product storage bin before high-pressure roller mill mill through transfer station, then forms closed circuit through high-pressure roller mill; Undersize is transported to floated dry-dressing machine through belt feeder and carries out dry separation, and the barren rock after dry separation is transported to refuse bin through belt feeder, and under storehouse, oscillating feeder entrucking is transported to refuse dump; Ore after dry separation is transported through transfer station, is transported to ore grinding storehouse by belt feeder.
Step 2, by described fine ore through two section of two closed circuit grinding, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge mine tailing;
Described two section of two closed circuit grinding is specially:
By classification after described fine ore ball milling, classification sand return turns back to ball mill, and to form one section of ball milling closed circuit, and after classification, overflow enters thick magnetic separation; Thick magnetic concentrate re-uses electromagnetic high frequency vibrating screen and sieves afterwards, and oversize enters Wet-type permanent magnet drum type magnetic separator concentrating, enters two sections of ball mills and continue ball millings after concentrated, product turn back to electromagnetic high frequency vibrating screen form two sections closed circuit; Undersize enters magnetic separation.
Described three smart magnetic separation, are specially:
Described undersize enters elutriation magnetic separator selected after carrying out once smart magnetic separation and secondary fine magnetic separation, sends into filter and filters, discharge mine tailing, obtain iron ore concentrate after carrying out three smart magnetic separation.
Fine ore after dry separation is transported to ore grinding storehouse through belt feeder, be given on the next part barrow band of storehouse by disk feeder, through bringing the primary grinding closed cycle into ball mill and grader composition to barrow, grader sand return returns ball mill, classifier overflow enters thick magnetic separation mine-separating box and feeds magnetic separator, thick magnetic concentrate enters high frequency vibrating screen to pump pond, ore deposit, oversize concentrates after magnetic separator concentrating through Wet-type permanent magnet drum type, enter two sections of ball mills, ore milling product enters high frequency vibrating screen and gets to electromagnetic high frequency vibrating screen through sand pump in the lump to pump pond, ore deposit and thick magnetic concentrate, form secondary grinding closed cycle, undersize enters once smart magnetic separation to pump pond, ore deposit, smart magnetic separation is got to once through sand pump, once the magnetic concentrate of smart magnetic separation flows automatically to secondary fine magnetic separation and carries out magnetic separation, the concentrate of secondary fine magnetic separation through pump and Cemented filling selected to elutriation magnetic separator, enter filter from wash mill iron ore concentrate out to filter, obtain final iron ore concentrate.
Step 3, at 10-15 DEG C, by described mine tailing through one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
Collector for phosphate rock flotation at lower temperature is added and inhibitor waterglass carries out the collecting of phosphorus concentrate in described smart magnetic tailing;
Wherein, during collecting, the pH value of fixing ore pulp is 9.
Add the collecting that collector for phosphate rock flotation at lower temperature and inhibitor waterglass carry out phosphorus concentrate, the rate of recovery, the concentrate grade of roughly selecting operation can be improved simultaneously and reduce tailings grade.
Preferably, described collector for phosphate rock flotation at lower temperature consumption is 1000 grams/ton, and inhibitor waterglass consumption is 800 grams/ton.
Described collector for phosphate rock flotation at lower temperature has multiple, all can realize the object of the invention.The present invention uses the composite drug be made up of oxidized paraffin wax soap, aliphatic acid and MES as collecting agent, and its proportion is respectively oxidized paraffin wax soap 65%, aliphatic acid 25% and MES10%; Collecting agent be made into 10% the aqueous solution stand-by;
Waterglass selected by inhibitor, be made into 10% the aqueous solution stand-by;
PH values of pulp adjusting agent selects sodium carbonate, adds dry powder during use directly in ore pulp;
When first paragraph mog accounts for 50% for-200 orders, one magnetic tail ore deposit is through thick four single-minded flotation flowsheets of sweeping, roughly selecting collector dosage is 800g/t, and each operation flotation temperature is 15 DEG C, can obtain grade 34.62%, phosphorus concentrate to raw ore productive rate 3.72%, the rate of recovery 74.09%; If through triple cleaning, the phosphorus concentrate of grade 34.07%, productive rate 3.97%, the rate of recovery 77.94% can be obtained.
When first paragraph mog accounts for 45% for-200 orders, one magnetic tail ore deposit is through thick four single-minded flotation flowsheets of sweeping, roughly selecting collector dosage is 800g/t, and each operation flotation temperature is 15 DEG C, can obtain grade 33.82%, phosphorus concentrate to raw ore productive rate 3.86%, the rate of recovery 75.42%.If through triple cleaning, grade 33.17%, phosphorus concentrate to raw ore productive rate 4.04%, the rate of recovery 77.22% can be obtained.
For crushing and screening dry separation flow process, for the feature that the selected grade of ore is extremely low, ore handling capacity wants scale, technological process will simplify, mine tailing is thrown as early as possible, so could reduce muck cost, reduce into mill ore amount, reduces ore grinding operating cost.
The beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals provided by the invention, adopt by raw ore through three sections, two closed circuit, broken, screening, dry separation technological process, dry separation goes out fine ore; Not only increase like this into abrasive particle level fineness, and achieve much broken and lessmill, reduce the energy consumption in mineral process and other raw materials consumptions to greatest extent, reduce beneficiation cost, improve economic benefit.
And producing in the process of iron ore concentrate with super low-ore grade magnetic iron ore, reducing the process to the extremely low gangue mineral of not iron content or iron content, is the key reducing production cost.Want to reduce the process to priceless mineral, it will be thrown from ore in advance and remove, throwing tail process in advance to ore, is the most important approach realizing above-mentioned reduction production cost.
Adopt dry method throwing tail in small, broken bits sorting process to sub-elect fine ore barren rock and ore in the present invention, the barren rock of dishing out be easy to stack process, processing cost is low, required place and capital expenditure little.
Adopt by described fine ore through two sections of closed circuit grinding flow processs, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge the method for mine tailing, achieve the object of low cost, high efficiency synthetical recovery extremely low-grade iron ore deposit.
Conventional phosphate rock floating processing temperature is 37 DEG C, and huge by this condition flotation workshop thermic load consumption, the heating boiler scale of construction of outfit is huge, heating system investment is large, and big energy-consuming, operating cost is high.10-15 DEG C is adjusted to by flotation operation temperature in this programme, carry out flotation at low temperature, not only do not affect sorting of phosphorus ore, and, compared by overall economics, phosphate rock floating processing temperature is adjusted downward to 10-15 DEG C by 37 DEG C, because reduce the requirement for device systems, decrease investment and energy consumption, significantly improve the rate of recovery of economic benefit.
Meanwhile, present invention also offers a kind of beneficiation combined method system of synthetical recovery association iron Phosphate minerals, as Figure 4-Figure 6, comprising: crushing and screening dry separation system, iron ore concentrate magnetic separation system and phosphorus concentrate floatation system;
Described crushing and screening dry separation system comprises: for coarse crushing gyratory crusher, in broken gyratory crusher, for one section of screening Double-layer circular vibration screen, the undersize after described one section of screening is carried out high-pressure roller mill in small, broken bits further and the Double-layer circular vibration screen closed circuit with its formation, for the floated dry-dressing machine of last dry separation; The said equipment in use, uses according to the order of sequence successively;
Described iron ore concentrate magnetic separation system comprises: wet type grate ball mill, duplex-spiral classifier, magnetic separator, electric and magnetic oscillation vibration sieve, Wet-type permanent magnet drum type concentrate magnetic separator, wet overflow type ball mill, smart magnetic separator, elutriation magnetic separator, filter; The said equipment in use, uses according to the order of sequence successively;
Described phosphorus concentrate floatation system comprises: lamella thickener, Wet-type permanent magnet drum type magnetic separator, tank diameter, flotation device, disk vacuum filter; The said equipment in use, uses according to the order of sequence successively.
Said system service condition is less demanding, and save energy consumption, floor space is little, reduces beneficiation cost dramatically, and the rate of recovery of iron ore concentrate and phosphorus concentrate is high.Select high pressure roller mill equipment, adopt the brand-new production technology for low-ore grade magnetic iron ore process and sorting technology equipment simultaneously, reduce the production processing cost of low-ore grade magnetic iron ore significantly.
Compared with prior art, the magnetic iron ore in the synthetical recovery extremely low-grade association fosfosiderite provided and the scheme of phosphate rock resource, it sorts, and cost is low, efficiency is high, save energy consumption, occupation of land is few, can realize the synthetical recovery of magnetic iron ore and phosphorus ore in the present invention.
Below, this technological process is described in detail with a specific embodiment:
Embodiment 1:
Step 1, by raw ore through three sections, two closed circuit, broken, sieving circuits, dry separation goes out fine ore;
Stope extracted ore is subject to ore storage bin through Automobile Transportation to PXZ-1200/160 gyratory crusher, carries out coarse crushing through PXZ-1200/160 gyratory crusher; Ore after coarse crushing is broken product storage bin in belt feeder is delivered to, then through belt feeder be delivered to HP500 standard cone crusher carry out in broken; Middle crumble product feeds the heavy Double-layer circular vibration screen of 2YAH2460 again through the belt feeder distribution bin be delivered to before one section of screening and carries out one section of screening; One section of oversize broken product storage bin in belt feeder is delivered to, with in broken formation closed circuit; Undersize is transported through No. 1 transfer station, and be transported to middle storage ore storage bin by belt feeder, then be transported to high pressure roller mill product storage bin by belt feeder, feed the current stabilization storehouse of weighing of high pressure roller mill through belt feeder, the ore of weighing in current stabilization storehouse feeds in high-pressure roller mill; The product of high-pressure roller mill is transported to two sections of screenings by belt feeder, and sieve through the heavy Double-layer circular vibration screen of 2YAH2460, oversize returns product storage bin before high-pressure roller mill mill through No. 2 transfer stations, then forms closed circuit through high-pressure roller mill; Undersize is transported to the floated dry-dressing machine of XF-200 type through belt feeder and carries out dry separation, and the barren rock after dry separation is transported to refuse bin through belt feeder, and under storehouse, oscillating feeder entrucking is transported to refuse dump; Ore after dry separation is transported through No. 3 transfer stations, is transported to ore grinding storehouse by belt feeder.
Step 2, by described fine ore through two section of two closed circuit grinding flow process, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge mine tailing;
Fine ore after dry separation is transported to ore grinding storehouse through belt feeder, be given on the next part barrow band of storehouse by disk feeder, through feeding the primary grinding closed cycle of MQG3600 × 6000 ball mill and 2FG-30 high-weir type double spiral classifier composition to barrow band, grader sand return returns ball mill, classifier overflow feeds CTB-1230 type magnetic separator, thick magnetic concentrate enters high frequency vibrating screen to pump pond, ore deposit, D5-MVSK1216 electromagnetic high frequency vibrating screen is got to through sand pump, oversize is after NCT-1030 Wet-type permanent magnet drum type magnetic separator concentrating, enter two sections of MQY2700 × 6000 overflowball mills, ore milling product enters high frequency vibrating screen and squeezes into high frequency vibrating screen in the lump to pump pond, ore deposit and thick magnetic concentrate, the secondary grinding closed cycle of composition, undersize enters smart magnetic separation I and gets to the magnetic separation of smart magnetic separation I (CTB-1024 type magnetic separator) to pump pond, ore deposit through sand pump, essence magnetic separation I magnetic concentrate flows automatically to the magnetic separation of smart magnetic separation II (CTB-1024 type magnetic separator), it is selected that essence magnetic separation II magnetic concentrate enters CH-CX26000 type elutriation magnetic separator in pump and Cemented filling to main building, wash mill iron ore concentrate enters main building filter and filters, concentrate filter cake is delivered to iron ore concentrate ore storage bin through belt feeder, obtain final iron ore concentrate.
Step 3, at 10-15 DEG C, by described mine tailing through one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
The product from failing of each stages of magnetic separation is Zi flowing to total tailings pump pond through pump and Cemented filling to 6000m
2after lamella thickener is concentrated, magnetic separation is swept to CTS-1245 Wet-type permanent magnet drum type magnetic separator through pump, sweep magnetic concentrate and flow automatically to high frequency vibrating screen to pump pond, ore deposit, sweep magnetic tail ore deposit after tank diameter stirs, the composite drug be made up of oxidized paraffin wax soap 65%, aliphatic acid 25% and MES10% is as phosphorus concentrate flotation at low temperature collecting agent, select waterglass as inhibitor, be made into 10% the aqueous solution stand-by; Select sodium carbonate as pH values of pulp adjusting agent, above-mentioned collector for phosphate rock flotation at lower temperature, inhibitor and pH adjusting agent are all added KYF-50 type flotation machine roughly select, rougher concentration feed KYF-20 type flotation machine carry out three sections selected, each section of selected mine tailing returns in proper order, and third time, selected concentrate was by 600m
2after lamella thickener is concentrated, enter ZPG-72 type disk vacuum filter and filter, concentrate filter cake is delivered to phosphorus concentrate ore storage bin through belt feeder, obtains final phosphorus concentrate.Rougher tailings feeds once purging selection KYF-50 type flotation machine, and scavenger concentrate returns to be roughly selected, and scans mine tailing and lamella thickener overflow and flows automatically to total mine tailing 4800m according to landform as total product from failing
2lamella thickener carry out concentrated after squeeze into Tailings Dam by CHARACTERISTICS OF TAILINGS SAND pumping plant.
Experimental example 1: table 1 is use the composite drug be made up of oxidized paraffin wax soap, aliphatic acid and MES as collecting agent, uses the method for floating flotation experimental results at different temperatures that the embodiment of the present invention 1 provides:
Known by result of the test, along with the reduction of flotation temperature, concentrate yield and the rate of recovery reduce gradually, and concentrate grade raises higher than reducing with temperature when 11 DEG C gradually at flotation temperature; During lower than 11 DEG C, concentrate grade starts to decline.When flotation temperature 15 DEG C, roughly selecting phosphorus concentrate grade is 14.18%, and the rate of recovery is 91.96%, concentrate grade higher than grade when 20 DEG C, when the rate of recovery is a little less than 20 DEG C.
Comparative example 1: use the composite drug be made up of oxidized paraffin wax soap, aliphatic acid and MES as collecting agent, uses conventional method for floating flotation experimental results at different temperatures:
Known by result of the test, within the scope of 25 DEG C-37 DEG C, along with the reduction of flotation temperature, concentrate grade raises, but productive rate and the rate of recovery reduce gradually; 20 DEG C time, roughly selecting the rate of recovery only has 66.54%, and when less than 20 DEG C, floatation indicators all obviously worsens, and concentrate grade and the rate of recovery are all very low.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a beneficiation combined method method for synthetical recovery association iron Phosphate minerals, is characterized in that, comprise the steps:
Step 1, by raw ore successively through three sections, two closed circuit, broken, sieving circuits, dry separation goes out fine ore;
Step 2, by described fine ore through two sections of closed circuit grinding flow processs, three smart magnetic separation, wash mill are selected, select iron ore concentrate, discharge mine tailing;
Step 3, at 10-15 DEG C, by described mine tailing through one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
2. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 1, is characterized in that:
In step 1, described fragmentation comprises: coarse crushing, in broken and ultrafine grinding;
Wherein, described coarse crushing adopts gyratory crusher to carry out coarse crushing, and broken in described is broken in adopting gyratory crusher to carry out, and described ultrafine grinding adopts high-pressure roller mill to carry out ultrafine grinding.
3. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 2, is characterized in that:
In step 1, described three sections, two closed circuit, broken, sieving circuit specifically comprises: one section screening is closed circuit and two sections of screenings are closed circuit;
Wherein said one section of screening comprises, use circular shale shaker inspection and sieve described in broken after product, its oversize return broken in gyratory crusher after again screening form closed circuit, undersize enter high-pressure roller mill carry out roller mill ultrafine grinding;
Carry out described two sections of screenings after roller mill, in described two sections of screenings, oversize carries out two sections of screenings again after returning described high-pressure roller mill continuation roller mill and forms closed circuit, and undersize enters floated dry-dressing machine and carries out dry separation.
4. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 3, is characterized in that:
In step 1, described dry separation goes out fine ore, specifically comprises and uses described floated dry-dressing machine to sub-elect barren rock and ore.
5. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 4, is characterized in that:
In step 2, described two sections of closed circuit grindings are specially:
By classification after described fine ore ball milling, classification sand return turns back to ball mill, and to form one section of ball milling closed circuit, and after classification, overflow enters thick magnetic separation;
Thick magnetic concentrate re-uses electromagnetic high frequency vibrating screen and sieves afterwards, and oversize enters Wet-type permanent magnet drum type magnetic separator concentrating, enter after concentrated two sections of ball mills continue ball milling products turn back to electromagnetic high frequency vibrating screen form two sections closed circuit;
Undersize enters three smart magnetic separation.
6. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 5, is characterized in that:
In step 2, described three smart magnetic separation, are specially:
Described undersize enters elutriation magnetic separator selected after carrying out a magnetic separation and secondary magnetic separation, finally carries out the filtration of three smart magnetic separation feeding filters and obtains iron ore concentrate, discharge mine tailing and enter into Flotation phosphate concentrate flow process.
7. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 6, is characterized in that:
In step 3, described at 10-15 DEG C, by described mine tailing through one roughing, once purging selection, floatingly selects after triple cleaning in phosphorus concentrate, specifically comprises:
Collector for phosphate rock flotation at lower temperature is added and inhibitor waterglass carries out the collecting of phosphorus concentrate in described mine tailing;
Wherein, during collecting, the pH value of fixing ore pulp is 9.
8. the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals according to claim 7, is characterized in that:
Described collector for phosphate rock flotation at lower temperature consumption is 1000 grams/ton, and inhibitor waterglass consumption is 800 grams/ton.
9. implement the claims the system of the beneficiation combined method method of a kind of synthetical recovery association iron Phosphate minerals described in any one of 1-8, it is characterized in that, comprising: crushing and screening dry separation system, iron ore concentrate magnetic separation system and phosphorus concentrate floatation system;
Described crushing and screening dry separation system comprises: for the gyratory crusher of described coarse crushing, for gyratory crusher broken in described, the Double-layer circular vibration screen for one section of screening, the floated dry-dressing machine that the undersize after described one section of screening carried out high-pressure roller mill in small, broken bits further, is used for the Double-layer circular vibration screens of two sections of screenings, the undersize after described two sections of screenings carried out last dry separation; The said equipment in use, uses according to the order of sequence successively continuously;
Described iron ore concentrate magnetic separation system comprises: grate ball mill, duplex-spiral classifier, magnetic separator, electric and magnetic oscillation vibration sieve, Wet-type permanent magnet drum type concentrate magnetic separator, overflowball mill, smart magnetic separator, elutriation magnetic separator, filter; The said equipment in use, uses according to the order of sequence successively continuously;
Described phosphorus concentrate floatation system comprises: lamella thickener, Wet-type permanent magnet drum type magnetic separator, tank diameter, flotation device, disk vacuum filter; The said equipment in use, uses according to the order of sequence successively continuously.
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