CN103962214A - Combined beneficiation method and combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals - Google Patents
Combined beneficiation method and combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals Download PDFInfo
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Abstract
The invention belongs to the technical field of efficient development of ultralow-grade ore resources and comprehensive utilization of associated minerals, and in particular relates to a combined beneficiation method and a combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals. The combined beneficiation method for the comprehensive recovery of the associated iron-phosphate minerals comprises the following steps: sequentially performing three-section and two-closed-loop crushing and screening flow on raw ores, and performing dry separation to obtain fine ores; performing two-section closed-loop ore-grinding flow on the fine ores, performing fine magnetic separation for three times, and concentrating by using a wash mill to separate iron ore concentrate and discharge tailings; performing one-time roughing, one-time scavenging and three-time concentrating on the tailings at the temperature of 10-15 DEG C to obtain phosphate ore concentrate by floatation. Compared with the prior art, the invention provides a comprehensive recovery scheme for magnetic iron ore resources and phosphate ore resources in ultralow-grade associated iron-phosphate minerals. According to the scheme, the separation cost is low, the efficiency is high, energy is saved, the space occupation is low, and the comprehensive recovery of the magnetic iron ores and the phosphate ores can be realized.
Description
Technical field
The invention belongs to ultralow grade ore resource Efficient Development and associated minerals comprehensive utilization technique field, be specifically related to a kind of beneficiation combined method method and system of comprehensive recovery association iron phosphorus ore thing.
Background technology
All the time, the ore of people to general iron-holder, by taking, " how broken few mill " technique reduces to reduce production costs into the granularity of ore grinding stone, also by adopting " throwing in advance useless " mode after even coarse crushing in small, broken bits before mill, reduce production costs, obtained significant economic benefit.
But the throwing of lump ore and lump ore is useless, is mainly the magnetic iron ore higher for grade, throw except the country rock gangue of carrying secretly in recovery process.For low-ore grade magnetic iron ore, massive ore is thrown to give up and can not be made a large amount of gangue minerals fully throw and remove, and also easily valuable mineral is dished out, and is difficult to reach the object significantly reducing production costs.
And phosphate rock floating flow process, conventional phosphate rock floating processing temperature is 37C °, consumes hugely by this condition flotation workshop thermic load, the heating boiler scale of construction of outfit is huge, heating system investment is large, and big energy-consuming, operating cost is high.
So it is high that the technique of preparing of the present association fosfosiderite for extremely low-grade still faces processing cost, energy consumption is high, and floor space is large, the shortcoming that the rate of recovery is low.
Summary of the invention
The object of the present invention is to provide one to sort that cost is low, efficiency is high, save energy consumption, take up an area less, can realize the beneficiation combined method method and system of the efficient comprehensive association iron phosphorus ore thing reclaiming 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 comprehensive recovery association iron phosphorus ore thing, 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 process one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
For crushing and screening dry separation flow process, for the extremely low feature of the selected grade of ore, ore handling capacity wants that scale, technological process will be simplified, mine tailing is thrown as early as possible, so could reduce muck cost, reduces into mill ore amount, reduces ore grinding operating cost.The beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing provided by the invention, adopts raw ore through three sections, the technological process of two closed circuit, broken, screening, dry separation, and dry separation goes out fine ore; So not only improve and entered abrasive particle level fineness, and realized how broken few mill, reduced to greatest extent energy consumption and other raw materials consumptions in mineral process, reduced beneficiation cost, improved economic benefit.
And producing to surpass low-ore grade magnetic iron ore in the process of iron ore concentrate, reduce the processing to the gangue mineral that iron content or iron content are extremely not low, be the key reducing production costs.Wanting to reduce the processing to priceless mineral, will in advance it be thrown and be removed from ore, ore is thrown to tail processing in advance, be to realize the above-mentioned most important approach reducing production costs.
In the present invention, adopt dry method throwing tail in small, broken bits sorting process to sub-elect fine ore barren rock and ore, the barren rock of dishing out is easy to stack and processes, and processing cost is low, and required place and capital expenditure are little.
Adopt 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, have realized the object of low cost, high efficiency comprehensive recovery extremely low-grade iron ore deposit.
Conventional phosphate rock floating processing temperature is 37 DEG C, consumes hugely by this condition flotation workshop thermic load, the heating boiler scale of construction of outfit is huge, heating system investment greatly, big energy-consuming, operating cost is high.In this programme, will at flotation operation temperature, be adjusted to 10-15 DEG C, carry out flotation at low temperature, not only do not affect sorting of phosphorus ore, and, by the comparison of complex art economy, phosphate rock floating processing temperature is adjusted downward to 10-15 DEG C by 37 DEG C, because reduced the requirement for device systems, reduce investment and energy consumption, significantly improved 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 is to adopt gyratory crusher to carry out coarse crushing, and broken in described is to adopt gyratory crusher broken in carrying out, and described ultrafine grinding is to adopt high-pressure roller mill to carry out ultrafine grinding.
In order to improve broken efficiency and broken fineness, adopt after gyratory crusher carries out coarse crushing, preferably adopt gyratory crusher broken in carrying out, adopt afterwards high-pressure roller mill to carry out ultrafine grinding.
Further, in step 1, described three sections, two closed circuit, broken, sieving circuit specifically comprise: one section screening is closed circuit and two sections of screenings are closed circuit;
Wherein said one section of closed circuit medium crushing and screening that cries again of screening is closed circuit, is, the product after using circular shale shaker screening broken in described, its oversize return broken in gyratory crusher after screening formation more 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 returns to described high-pressure roller mill and continues to carry out after roller mill two sections of screenings again and form closed circuitly, and undersize enters floated dry-dressing machine and carries out dry separation.
Product granularity after crushing efficiency and the fragmentation of high-pressure roller mill all relatively has superiority, and can improve grinding capacity, needs the auxiliary material such as steel ball, liner plate that use all to decrease, and can reduce beneficiation cost.Select high pressure roller mill equipment, adopt brand-new production technology and sorting technology equipment for low-ore grade magnetic iron ore processing simultaneously, reduced significantly the production processing cost of low-ore grade magnetic iron ore.
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 to disintegrating machine is subject to ore storage bin, carries out coarse crushing through gyratory crusher; Ore after coarse crushing is broken buffering ore storage bin in belt feeder is delivered to, then it is broken in carrying out to be delivered to gyratory crusher through belt feeder; Middle crumble product is delivered to one section of distribution bin before screening through belt feeder and feeds circular shale shaker again and carry out one section of screening; One section of screening oversize broken buffering ore storage bin in belt feeder is delivered to, with in broken formation closed circuit; Undersize is transported through transfer station, storage ore storage bin in the middle of being transported to by belt feeder, then be transported to high pressure roller mill buffering ore storage bin by belt feeder, and the current stabilization storehouse of weighing before belt feeder feeds high pressure roller mill, 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 is buffering ore storage bin before transfer station returns to high-pressure roller mill mill, 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, it is closed circuit that classification sand return turns back to one section of ball milling of ball mill formation, 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 carries out once, after smart magnetic separation and secondary fine magnetic separation, entering elutriation magnetic separator selected, finally carries out three smart magnetic separation and sends into filter filtration, discharges mine tailing, obtains 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 bring the primary grinding closed cycle into ball mill and grader composition to barrow, ball mill is returned in grader sand return, 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 is after the concentrated magnetic separator concentrating of 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, it is selected that the concentrate of secondary fine magnetic separation is transported to elutriation magnetic separator through pump and pipeline, entering filter from wash mill iron ore concentrate out filters, obtain final iron ore concentrate.
Further, in step 3, at 10-15 DEG C, by described mine tailing process one roughing, once purging selection, triple cleaning, floatingly selects in phosphorus concentrate, specifically comprises:
In described smart magnetic tailing, add collector for phosphate rock flotation at lower temperature and inhibitor waterglass to carry out the collecting of phosphorus concentrate;
Wherein, when collecting, the pH value of fixing ore pulp is 9.
Add collector for phosphate rock flotation at lower temperature and inhibitor waterglass to carry out the collecting of phosphorus concentrate, can improve simultaneously and roughly select the rate of recovery, the concentrate grade of operation 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, the present invention also provides a kind of beneficiation combined method system of comprehensive recovery association iron phosphorus ore thing, 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 coarse crushing, for broken gyratory crusher, for the Double-layer circular vibration screen of one section of screening, the undersize after described one section of screening is carried out to high-pressure roller mill further in small, broken bits 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, the concentrated magnetic separator of Wet-type permanent magnet drum type, 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, saves energy consumption, and floor space is little, has reduced dramatically beneficiation cost, and the rate of recovery of iron ore concentrate and phosphorus concentrate is high.Select high pressure roller mill equipment, adopt brand-new production technology and sorting technology equipment for low-ore grade magnetic iron ore processing simultaneously, reduced significantly the production processing cost of low-ore grade magnetic iron ore.
The present invention compared with prior art, the magnetic iron ore in the comprehensive recovery extremely low-grade association fosfosiderite providing and the scheme of phosphate rock resource, it sorts, and cost is low, efficiency is high, save energy consumption, take up an area less, can realize the comprehensive recovery of magnetic iron ore and phosphorus ore.
Brief description of the drawings
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 comprehensive recovery association iron phosphorus ore thing, 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 is to adopt gyratory crusher to carry out coarse crushing, and broken in described is to adopt gyratory crusher broken in carrying out, and described ultrafine grinding is to adopt high-pressure roller mill to carry out ultrafine grinding.
In order to improve broken efficiency and broken fineness, adopt after gyratory crusher carries out coarse crushing, preferably adopt gyratory crusher broken in carrying out, adopt afterwards high-pressure roller mill to carry out ultrafine grinding.
Described three sections, two closed circuit, broken, sieving circuit specifically comprise: one section screening is closed circuit and two sections of screenings are closed circuit;
Wherein said one section of closed circuit medium crushing and screening that cries again of screening is closed circuit, is the product after using circular shale shaker screening broken in described, its oversize return broken in gyratory crusher after screening formation more 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 returns to described high-pressure roller mill and continues to carry out after roller mill two sections of screenings again and form closed circuitly, and undersize enters floated dry-dressing machine and carries out dry separation.
Product granularity after crushing efficiency and the fragmentation of high-pressure roller mill all relatively has superiority, and can improve grinding capacity, needs the auxiliary material such as steel ball, liner plate that use all to decrease, and can reduce beneficiation cost.Select high pressure roller mill equipment, adopt brand-new production technology and sorting technology equipment for low-ore grade magnetic iron ore processing simultaneously, reduced significantly the production processing cost of low-ore grade magnetic iron ore.
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 to disintegrating machine is subject to ore storage bin, carries out coarse crushing through gyratory crusher; Ore after coarse crushing is broken buffering ore storage bin in belt feeder is delivered to, then it is broken in carrying out to be delivered to gyratory crusher through belt feeder; Middle crumble product is delivered to one section of distribution bin before screening through belt feeder and feeds circular shale shaker again and carry out one section of screening; One section of screening oversize broken buffering ore storage bin in belt feeder is delivered to, with in broken formation closed circuit; Undersize is transported through transfer station, storage ore storage bin in the middle of being transported to by belt feeder, then be transported to high pressure roller mill buffering ore storage bin by belt feeder, and the current stabilization storehouse of weighing before belt feeder feeds high pressure roller mill, 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 is buffering ore storage bin before transfer station returns to high-pressure roller mill mill, 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, it is closed circuit that classification sand return turns back to one section of ball milling of ball mill formation, 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, and entering two sections of ball mills after concentrated continues ball millings, 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 carries out once, after smart magnetic separation and secondary fine magnetic separation, entering elutriation magnetic separator selected, carries out sending into filter filtration after three smart magnetic separation, discharges mine tailing, obtains 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 bring the primary grinding closed cycle into ball mill and grader composition to barrow, ball mill is returned in grader sand return, 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 is after the concentrated magnetic separator concentrating of 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, get to once smart magnetic separation through sand pump, once the magnetic concentrate of smart magnetic separation flows automatically to secondary fine magnetic separation and carries out magnetic separation, it is selected that the concentrate of secondary fine magnetic separation is transported to elutriation magnetic separator through pump and pipeline, entering filter from wash mill iron ore concentrate out filters, obtain final iron ore concentrate.
Step 3, at 10-15 DEG C, by described mine tailing process one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
In described smart magnetic tailing, add collector for phosphate rock flotation at lower temperature and inhibitor waterglass to carry out the collecting of phosphorus concentrate;
Wherein, when collecting, the pH value of fixing ore pulp is 9.
Add collector for phosphate rock flotation at lower temperature and inhibitor waterglass to carry out the collecting of phosphorus concentrate, can improve simultaneously and roughly select the rate of recovery, the concentrate grade of operation 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 being 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%; It is stand-by that collecting agent is made into 10% the aqueous solution;
Inhibitor is selected waterglass, is made into 10% the aqueous solution stand-by;
PH values of pulp adjusting agent is selected sodium carbonate, when use, directly in ore pulp, adds dry powder;
In the time that 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, can obtain the phosphorus concentrate of grade 34.07%, productive rate 3.97%, the rate of recovery 77.94%.
In the time that 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, can obtain grade 33.17%, phosphorus concentrate to raw ore productive rate 4.04%, the rate of recovery 77.22%.
For crushing and screening dry separation flow process, for the extremely low feature of the selected grade of ore, ore handling capacity wants that scale, technological process will be simplified, mine tailing is thrown as early as possible, so could reduce muck cost, reduces into mill ore amount, reduces ore grinding operating cost.
The beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing provided by the invention, adopts raw ore through three sections, the technological process of two closed circuit, broken, screening, dry separation, and dry separation goes out fine ore; So not only improve and entered abrasive particle level fineness, and realized how broken few mill, reduced to greatest extent energy consumption and other raw materials consumptions in mineral process, reduced beneficiation cost, improved economic benefit.
And producing to surpass low-ore grade magnetic iron ore in the process of iron ore concentrate, reduce the processing to the gangue mineral that iron content or iron content are extremely not low, be the key reducing production costs.Wanting to reduce the processing to priceless mineral, will in advance it be thrown and be removed from ore, ore is thrown to tail processing in advance, be to realize the above-mentioned most important approach reducing production costs.
In the present invention, adopt dry method throwing tail in small, broken bits sorting process to sub-elect fine ore barren rock and ore, the barren rock of dishing out is easy to stack and processes, and processing cost is low, and required place and capital expenditure are little.
Adopt 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, have realized the object of low cost, high efficiency comprehensive recovery extremely low-grade iron ore deposit.
Conventional phosphate rock floating processing temperature is 37 DEG C, consumes hugely by this condition flotation workshop thermic load, the heating boiler scale of construction of outfit is huge, heating system investment greatly, big energy-consuming, operating cost is high.In this programme, will at flotation operation temperature, be adjusted to 10-15 DEG C, carry out flotation at low temperature, not only do not affect sorting of phosphorus ore, and, by the comparison of complex art economy, phosphate rock floating processing temperature is adjusted downward to 10-15 DEG C by 37 DEG C, because reduced the requirement for device systems, reduce investment and energy consumption, significantly improved the rate of recovery of economic benefit.
Meanwhile, the present invention also provides a kind of beneficiation combined method system of comprehensive recovery association iron phosphorus ore thing, 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 the gyratory crusher of coarse crushing, for broken gyratory crusher, for the Double-layer circular vibration screen of one section of screening, the undersize after described one section of screening is carried out to high-pressure roller mill further in small, broken bits 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, the concentrated magnetic separator of Wet-type permanent magnet drum type, 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, saves energy consumption, and floor space is little, has reduced dramatically beneficiation cost, and the rate of recovery of iron ore concentrate and phosphorus concentrate is high.Select high pressure roller mill equipment, adopt brand-new production technology and sorting technology equipment for low-ore grade magnetic iron ore processing simultaneously, reduced significantly the production processing cost of low-ore grade magnetic iron ore.
The present invention compared with prior art, the magnetic iron ore in the comprehensive recovery extremely low-grade association fosfosiderite providing and the scheme of phosphate rock resource, it sorts, and cost is low, efficiency is high, save energy consumption, take up an area less, can realize the comprehensive recovery of magnetic iron ore and phosphorus ore.
Below, describe this technological process 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 buffering ore storage bin in belt feeder is delivered to, then it is broken in carrying out to be delivered to HP500 standard cone crusher through belt feeder; Middle crumble product is delivered to one section of distribution bin before screening through belt feeder and feeds the heavy Double-layer circular vibration screen of 2YAH2460 again and carry out one section of screening; One section of oversize broken buffering ore storage bin in belt feeder is delivered to, with in broken formation closed circuit; Undersize is transported through No. 1 transfer station, storage ore storage bin in the middle of being transported to by belt feeder, then be transported to high pressure roller mill buffering ore storage bin by belt feeder, and feeding 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, sieves through the heavy Double-layer circular vibration screen of 2YAH2460, and oversize is buffering ore storage bin before No. 2 transfer stations return to high-pressure roller mill mill, 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 feed the primary grinding closed cycle of MQG3600 × 6000 ball mill and 2FG-30 high-weir type double spiral classifier composition to barrow band, ball mill is returned in grader sand return, classifier overflow feeds CTB-1230 type magnetic separator, thick magnetic concentrate enters high frequency vibrating screen to pump pond, ore deposit, get to D5-MVSK1216 electromagnetic high frequency vibrating screen 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 in the lump high frequency vibrating screen 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 smart magnetic separation I (CTB-1024 type magnetic separator) magnetic separation to pump pond, ore deposit through sand pump, essence magnetic separation I magnetic concentrate flows automatically to smart magnetic separation II (CTB-1024 type magnetic separator) magnetic separation, essence magnetic separation II magnetic concentrate is transported to through pump and pipeline that in main building, to enter CH-CX26000 type elutriation magnetic separator selected, 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 process one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
The product from failing of each stages of magnetic separation is transported to 6000m from flowing to total tailings pump pond through pump and pipeline
2after lamella thickener is concentrated, sweep magnetic separation through pump to CTS-1245 Wet-type permanent magnet drum type magnetic separator, 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 being 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, all add KYF-50 type flotation machine to roughly select above-mentioned collector for phosphate rock flotation at lower temperature, inhibitor and pH adjusting agent, roughly select concentrate feed KYF-20 type flotation machine carry out three sections selected, each section of selected mine tailing returns in proper order, and selected concentrate is by 600m for the third time
2after lamella thickener is concentrated, enters 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
2after concentrating, lamella thickener squeezes into Tailings Dam by CHARACTERISTICS OF TAILINGS SAND pumping plant.
Experimental example 1: table 1 is to use the composite drug being made up of oxidized paraffin wax soap, aliphatic acid and MES as collecting agent, the flotation experimental results of the method for floating that the use embodiment of the present invention 1 provides under different temperatures:
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 reduces gradually and raises with temperature during higher than 11 DEG C at flotation temperature; During lower than 11 DEG C, concentrate grade starts to decline.In the time of 15 DEG C of flotation temperatures, roughly selecting phosphorus concentrate grade is 14.18%, and the rate of recovery is 91.96%, the grade of concentrate grade during higher than 20 DEG C, and the rate of recovery is during a little less than 20 DEG C.
Comparative example 1: use the composite drug being formed by oxidized paraffin wax soap, aliphatic acid and MES as collecting agent, use the flotation experimental results of conventional method for floating under 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; In the time of 20 DEG C, roughly selecting the rate of recovery only has 66.54%, 20 DEG C when following, and 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 of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a comprehensive beneficiation combined method method that reclaims association iron phosphorus ore thing, is characterized in that, comprises 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 process one roughing, once purging selection, triple cleaning, floatingly selects phosphorus concentrate.
2. the beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing 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 is to adopt gyratory crusher to carry out coarse crushing, and broken in described is to adopt gyratory crusher broken in carrying out, and described ultrafine grinding is to adopt high-pressure roller mill to carry out ultrafine grinding.
3. the beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing according to claim 2, is characterized in that:
In step 1, described three sections, two closed circuit, broken, sieving circuit specifically comprise: 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 the product after broken in described, its oversize return broken in gyratory crusher after again screening form closed circuitly, undersize enters high-pressure roller mill and carries out roller mill ultrafine grinding;
After roller mill, carry out described two sections of screenings, in described two sections of screenings, oversize returns to described high-pressure roller mill to continue to carry out after roller mill two sections of screenings again and forms closed circuitly, and undersize enters floated dry-dressing machine and carries out dry separation.
4. the beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing 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 comprehensive recovery association iron phosphorus ore thing 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, it is closed circuit that classification sand return turns back to one section of ball milling of ball mill formation, 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 comprehensive recovery association iron phosphorus ore thing according to claim 5, is characterized in that:
In step 2, described three smart magnetic separation, are specially:
Described undersize carries out, after a magnetic separation and secondary magnetic separation, entering elutriation magnetic separator selected, finally carries out three smart magnetic separation and sends into filter and filter and obtain iron ore concentrate, discharges mine tailing and enters into Flotation phosphate concentrate flow process.
7. the beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing 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:
In described mine tailing, add collector for phosphate rock flotation at lower temperature and inhibitor waterglass to carry out the collecting of phosphorus concentrate;
Wherein, when collecting, the pH value of fixing ore pulp is 9.
8. the beneficiation combined method method of a kind of comprehensive recovery association iron phosphorus ore thing 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. according to the beneficiation combined method system of a kind of comprehensive recovery association iron phosphorus ore thing described in claim 1-8 any one, it is characterized in that, comprising: crushing and screening dry separation system, iron ore concentrate magnetic separation system and phosphorus concentrate floatation system;
Described muck screening dry separation system comprises: for the gyratory crusher of described coarse crushing, for described broken gyratory crusher, for the Double-layer circular vibration screen of one section of screening, the undersize after described one section of screening is carried out to high-pressure roller mill further in small, broken bits, the floated dry-dressing machine that carries out last dry separation for the Double-layer circular vibration screen of two sections of screenings, by the undersize after described two sections of screenings; 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, the concentrated magnetic separator of Wet-type permanent magnet drum type, 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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Address after: 066001 No. 57 Yingbin Road, Haigang District, Qinhuangdao City, Hebei Province Co-patentee after: HEBEI IRON & STEEL GROUP MINE DESIGN Co.,Ltd. Patentee after: MCC SHENKAN QINGHUANGDAO DESIGN INSTITUTE CO.,LTD. Address before: 066001 No. 57 Yingbin Road, Haigang District, Qinhuangdao City, Hebei Province Co-patentee before: HEBEI IRON & STEEL GROUP MINE DESIGN Co.,Ltd. Patentee before: SHEN KAN QINHUANGDAO ENGINEERING & TECHNOLOGY CORPORATION, MCC |
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Effective date of registration: 20190211 Address after: 110003 No. 300 Baita Third Street, Hunnan District, Shenyang City, Liaoning Province Patentee after: SHEN KAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Address before: 066001 No. 57 Yingbin Road, Haigang District, Qinhuangdao City, Hebei Province Co-patentee before: HEBEI IRON & STEEL GROUP MINE DESIGN Co.,Ltd. Patentee before: MCC SHENKAN QINGHUANGDAO DESIGN INSTITUTE CO.,LTD. |