CN101564707B - Vanadium titano-magnetite screen method - Google Patents
Vanadium titano-magnetite screen method Download PDFInfo
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Abstract
The invention relates to a screen method for vanadium titano-magnetite with high quality, belonging to the ore screen field. The method adopts three stage-grinding and stage-concentration process for magnetic separation, wherein the field intensity of one-stage magnetic separation is 3000-4000 Gs; the field intensity of two-stage magnetic separation is 1800-2200 Gs; and the field intensity of three-stage magnetic separation is 1300-1700 Gs. The recovery rate of the screened iron ore concentrate and the titanium ore concentrate is high and the screened cost of the screened iron ore concentrate and the titanium ore concentrate is low, thus providing a new selection for the low grade vanadium titano-magnetite resource and having a broad application prospect.
Description
Technical field
The present invention relates to vanadium titano-magnetite screen method, belong to the screening field of ore.
Background technology
The vanadium and titanium resources of China's Panzhihua Region is abundant, and the v-ti magnetite ore reserves reaches 10,000,000,000 tons, accounts for 20% of national iron ore reserves, and there are Panzhihua, Taihe county, Baima, red lattice etc. in main large-scale mining area, and the TFe average content is 25～33%.Mine, Pan Jia field belongs to ore deposit, north, Hongge Deposit district section, 3.8 hundred million tons of oils in place, wherein Fe
4(TFe=16.60%, TiO
2=6.42%) accounts for about 40% mine, Pan Jia field vanadium titano-magnetite TFe, TiO
2Average content is respectively 26.23%, 10.82%.
Vanadium titano-magnetite mainly is at Fe at present
2+3Adopt two sections rank mill rank choosing (being limit edging choosing, regrinding and reconcentration) to select iron, adopt spiral electric separation+method for floating to select titanium or bulk flotation method to select titanium or spiral+shaking table method to select titanium selecting the mine tailing behind the iron.Mill rank, two sections rank choosing method selects iron, and first section ore grinding to 200 order granularity is 45%, is 1800～2500Gs magnetic separation in field intensity; Second section ore grinding to-200 order granularity is 80%, is 1300～1800Gs magnetic separation in field intensity.Its shortcoming is that titanium recovery rate is not high, and the iron ore concentrate quality of being screened is on the low side.Mainly be applicable to the screening of the high-grade vanadium titano-magnetite of TFe (full iron) 〉=30%.
Along with reducing gradually and national adjustment to the mineral resources policy of mineral resources, v-ti magnetite ore dressing enterprise must fully utilize low grade vanadium titanomagnetite (referring to the vanadium titano-magnetite of TFe content between 15-25) resource.And adopt existing two sections rank mill rank choosing method screening low grade vanadium titanomagnetite, and the rate of recovery of gained iron ore concentrate and ilmenite concentrate is lower, and cost is higher.
Summary of the invention
Technical problem to be solved by this invention provides the higher vanadium titano-magnetite screen method of a kind of iron ore concentrate quality.
Vanadium titano-magnetite screen method of the present invention is to adopt mill rank, three sections rank to select technology to carry out magnetic separation, and wherein, the field intensity of a stages of magnetic separation is 3000～4000Gs; The field intensity of two stages of magnetic separation is 1800～2200Gs; The field intensity of three stages of magnetic separation is 1300～1700Gs.
Further, mill rank, three sections rank select technology to comprise the steps:
A, a stages of magnetic separation: ore is slightly broken to be pulverized to granularity≤15mm, and it is 30% ore pulp that grading system gets-200 order granularities, and field intensity is that 3000～4000Gs carries out magnetic separation and obtains a stages of magnetic separation concentrate and a stages of magnetic separation mine tailing;
B, two stages of magnetic separation: a step annual earnings one stages of magnetic separation concentrate takes off and carries out the second time behind the magnetic and pulverize, and it is 55% ore pulp that grading system gets-200 order granularities, and field intensity is that 1800～2200Gs magnetic separation obtains two stages of magnetic separation concentrate and two stages of magnetic separation mine tailings;
C, three stages of magnetic separation: pulverize for the third time after step b gained two stages of magnetic separation concentrate take off magnetic, grading system gets-200 order granularities and reaches 80% ore pulp, and field intensity is that 1300～1700Gs magnetic separation obtains iron ore concentrate and three stages of magnetic separation mine tailings.
Adopt mill rank, above-mentioned three sections rank to select the craft screening vanadium titano-magnetite can obtain the higher iron ore concentrate of quality.
Further, further comprising the steps of:
The screening of d, ilmenite concentrate: one, two, three sections magnetic tailing enters spiral chute after concentrating, and obtains titanium chats (TiO
2Content is more than 37%) and spiral mine tailing, the titanium chats obtains ilmenite concentrate and the titanium mine tailing is selected in dry separation through dry separation.
Described dry separation is carried out selected for magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine in adopting and is scanned.
Dry separation selects titanium mine tailing and spiral mine tailing to adopt the strong magnetic machine of high gradient enrichment+flotation device to roughly select, scan and the selected ilmenite concentrate (TiO that obtains
2Content is more than 47%).
Find that after deliberation the granularity that it is suitable that titanium is reclaimed in the ilmenite concentrate gravity treatment is 0.4-0.1mm, mill rank, existing two sections rank select second section ore grinding of iron method thinner, the gravity treatment that is unfavorable for titanium is reclaimed, and three sections ore grindings of process using are selected on mill rank, three sections rank of the present invention, the 3rd section amount that ore grinding is thinner is less relatively, has improved the rate of recovery of titanium, through repeatedly experimental results show that, the vanadium titano-magnetite of identical grade, the rate of recovery of the inventive method titanium can improve more than 10%.
Further, the preferred version of vanadium titano-magnetite screen method of the present invention is: the field intensity of a stages of magnetic separation is 3000～3500Gs; The field intensity of two stages of magnetic separation is 1800～2000Gs; The field intensity of three stages of magnetic separation is 1200～1700Gs.The most preferably scheme of vanadium titano-magnetite screen method of the present invention is: the field intensity of a stages of magnetic separation is 3500Gs, and the field intensity of two stages of magnetic separation is 2000Gs, and the field intensity of three stages of magnetic separation is 1600Gs.
Vanadium titano-magnetite screen method of the present invention has following beneficial effect:
When 1, the inventive method is used for the screening of high-grade vanadium titano-magnetite, can improve the quality of gained iron ore concentrate and the rate of recovery of ilmenite concentrate.The titanium recovery rate of the inventive method is more than 30%, and with mill rank, two sections rank select mine tailing behind the iron select the titanium recovery rate of titanium lower (spiral-electric separation+flotation, spiral-dry high-magnetic separation+flotation, the bulk flotation ilmenite concentrate rate of recovery are 25～35%, the rate of recovery of spiral+table concentration ilmenite concentrate titanium then have only 10% less than).
When 2, the inventive method is used for the screening of low grade vanadium titanomagnetite, can improve the rate of recovery of iron ore concentrate and ilmenite concentrate.
3, the cost lower (being 150-200 unit/ton) of the inventive method screening ilmenite concentrate, (cost of bulk flotation production ilmenite concentrate is about 300-400 unit/ton and select mine tailing behind the iron to select the cost of ilmenite concentrate higher with mill rank, two sections rank, the cost that spiral+electric separation is produced ilmenite concentrate is about 200-250 unit/ton, and the cost of spiral+table concentration ilmenite concentrate is about 180-250 unit/ton).
4, the inventive method provides a kind of new selection for the comprehensive utilization of low grade vanadium ilmenite resource.
Description of drawings
Fig. 1 is the process chart of vanadium titano-magnetite screen method of the present invention.
The specific embodiment
Vanadium titano-magnetite screen method of the present invention comprises the steps:
A, a stages of magnetic separation: ore reduction, carrying out the first time then pulverizes, the closed circuit classification of spiral (is that material after in small, broken bits enters vibratory sieve, screenings advances next process, and oversize returns in small, broken bits again), make-200 order granularities and be 30% ore pulp (can be 30% by the ore pulp of 200 mesh sieves), low intensity magnetic separation machine with field intensity 3000～4000Gs carries out thick magnetic separation and sweeps magnetic separation (earlier thick magnetic separation, sweep magnetic separation then, down together), obtain a stages of magnetic separation concentrate and a stages of magnetic separation mine tailing;
B, two stages of magnetic separation: a stages of magnetic separation concentrate carries out the pulverizing second time after taking off magnetic, closed circuit classification, make-200 order granularities and be 55% ore pulp, carry out thick magnetic separation and sweep magnetic separation, obtain two stages of magnetic separation concentrate and two stages of magnetic separation mine tailings with the low intensity magnetic separation machine of field intensity 1800～2200Gs;
C, three stages of magnetic separation: pulverize for the third time after two stages of magnetic separation concentrate take off magnetic, closed circuit classification, make-200 order granularities and reach 80% ore pulp, carry out thick magnetic separation and smart magnetic separation, obtain iron ore concentrate (TFe content is more than 56%) and three stages of magnetic separation mine tailings with the low intensity magnetic separation machine of field intensity 1300～1700Gs;
The screening of d, ilmenite concentrate: one, two, three sections magnetic tailing enters spiral chute (spiral chute is to utilize the principle of the centripetal force of spiral to select titanium) again through concentrating the laggard waterpower cyclone of going into, and obtains titanium chats (TiO
2Content is about 37%) and the spiral mine tailing, the titanium chats obtains ilmenite concentrate (TiO through the dry separation of dry separation system
2Content is more than 47%) and dry separation select the titanium mine tailing, the dry separation of wherein said dry separation system is carried out selected for magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine in adopting and is scanned (technological process of dry separation step is: spiral concentrate-ramming-deironing-selected 2-of selected 1-ramming-selected 3-again scans).
Dry separation is selected titanium mine tailing and spiral mine tailing then to enter the floatation system flotation and is obtained ilmenite concentrate (TiO
2Content is more than 47%), wherein said floatation system flotation (is a pulsating high gradient magnetic separator with vertical ring for adopting the enrichment of the strong magnetic machine of high gradient, the background field intensity is 0-10000Gs)+flotation device roughly selects, scan and selected (its processing step is: mine tailing-concentrate-low intensity magnetic separation-every the closed circuit screening-high intensity magnetic separation of sieve-high intensity magnetic separation-ball milling-deironing-stirrings-Jia collecting agent and adjust agent-slightly float-sweep the floating-smart 4-of floating essence of the smart floating 3-of the smart floating 2-of smart floating 1-to float the 5-ilmenite concentrate)
Wherein, can adopt ball mill etc. to pulverize in above-mentioned a, b, the c step.
Wherein, the closed circuit classification in above-mentioned a, the b step can adopt conventional spiral classifier to carry out, and above-mentioned c step adopts cyclone and high frequency shale shaker to carry out closed circuit classification.
Below in conjunction with embodiment the specific embodiment of the present invention is further described, does not therefore limit the present invention among the described scope of embodiments.
Embodiment 1 usefulness the inventive method screening low grade vanadium titanomagnetite
Getting TFe is 25%, TiO
2Content is 10.5% vanadium titano-magnetite 1000t, ore reduction, screening, the ore grain size≤15mm behind the finished breaking.Ore after the fragmentation enters ball mill, cooperates spiral classifier to carry out the closed circuit classification of primary grinding, and ore pulp-200 order granularity reaches 30%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 3350Gs; One stages of magnetic separation concentrate enters two sections ball mills after taking off magnetic, cooperates spiral classifier to carry out the closed circuit classification of secondary grinding, and-200 order granularities reach 55%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 1850Gs; Two stages of magnetic separation concentrate enter three sections ball mills after taking off magnetic, cooperate cyclone and high frequency shale shaker to carry out three sections closed circuit classifications of ore grinding,-200 order granularities reach 80%, carry out thick magnetic separation and smart magnetic separation with the low intensity magnetic separation machine of field intensity 1650Gs, obtain TFe content and be 57% iron ore concentrate 286t.
One, two, three sections magnetic tailing enters spiral chute respectively after cyclone concentrates, and obtains TiO
2Content is the titanium chats more than 37%, further goes out TiO through dry separation system (middle magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine selected and scan) dry separation
2Content is 47% ilmenite concentrate 45t.
Dry separation is selected titanium mine tailing and spiral mine tailing then to enter floatation system (the strong magnetic machine of high gradient enrichment+flotation device is roughly selected, scanned with selected) flotation and is obtained TiO
2Content is 47% ilmenite concentrate 33t; Total mine tailing enters the mine tailing storehouse and piles up.
The rate of recovery of iron ore concentrate is 65.21%, and the rate of recovery of ilmenite concentrate is 34.91%, and the screening cost of iron ore concentrate is 218 yuan/t, and the screening cost of ilmenite concentrate is 302 yuan/t.
It is 56% that the vanadium titano-magnetite of identical grade adopts mill rank, two sections rank to select the TFe content of iron gained iron ore concentrate, and the iron ore concentrate rate of recovery is 65.13%; Mine tailing selects the TiO of titanium gained ilmenite concentrate
2Content is 47%, and the ilmenite concentrate rate of recovery is 28.13%; The screening cost of iron ore concentrate is 216 yuan/t, and the screening cost of ilmenite concentrate is 385 yuan/t.
Embodiment 2 usefulness the inventive method screening low grade vanadium titanomagnetite
Getting TFe is 24%, TiO
2Content is 10% vanadium titano-magnetite 1000t, ore reduction, screening, the ore grain size≤15mm behind the finished breaking.Ore after the fragmentation enters ball mill, cooperates spiral classifier to carry out the closed circuit classification of primary grinding, and ore pulp-200 order granularity reaches 30%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 3400Gs; One stages of magnetic separation concentrate enters two sections ball mills after taking off magnetic, cooperates spiral classifier to carry out the closed circuit classification of secondary grinding, and-200 order granularities reach 55%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 1900Gs; Two stages of magnetic separation concentrate enter three sections ball mills after taking off magnetic, cooperate cyclone and high frequency shale shaker to carry out three sections closed circuit classifications of ore grinding,-200 order granularities reach 80%, carry out thick magnetic separation and smart magnetic separation with the low intensity magnetic separation machine of field intensity 1600Gs, obtain TFe content and be 57% iron ore concentrate 270t.
One, two, three sections magnetic tailing enters spiral chute respectively after cyclone concentrates, and obtains TiO
2Content is the titanium chats more than 37%, further goes out TiO through dry separation system (middle magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine selected and scan) dry separation
2Content is 47% ilmenite concentrate 41t.
Dry separation is selected titanium mine tailing and spiral mine tailing then to enter floatation system (the strong magnetic machine of high gradient enrichment+flotation device is roughly selected, scanned with selected) flotation and is obtained TiO
2Content is 47% ilmenite concentrate 32t; Total mine tailing enters the mine tailing storehouse and piles up.
The rate of recovery of iron ore concentrate is 64.13%, and the rate of recovery of ilmenite concentrate is 32.68%, and the screening cost of iron ore concentrate is 229 yuan/t, and the screening cost of ilmenite concentrate is 309 yuan/t.
It is 56% that the vanadium titano-magnetite of identical grade adopts mill rank, two sections rank to select the TFe content of iron gained iron ore concentrate, and the iron ore concentrate rate of recovery is 63.75%; Mine tailing selects the TiO of titanium gained ilmenite concentrate
2Content is 47%, and the ilmenite concentrate rate of recovery is 26.17%; The screening cost of iron ore concentrate is 230 yuan/t, and the screening cost of ilmenite concentrate is 390 yuan/t.
Embodiment 3 usefulness the inventive method screening low grade vanadium titanomagnetite
Getting TFe is 22%, TiO
2Content is 9.5% vanadium titano-magnetite 1000t, ore reduction, screening, the ore grain size≤15mm behind the finished breaking.Ore after the fragmentation enters ball mill, cooperates spiral classifier to carry out the closed circuit classification of primary grinding, and ore pulp-200 order granularity reaches 30%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 3450Gs; One stages of magnetic separation concentrate enters two sections ball mills after taking off magnetic, cooperates spiral classifier to carry out the closed circuit classification of secondary grinding, and-200 order granularities reach 55%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 2000Gs; Two stages of magnetic separation concentrate enter three sections ball mills after taking off magnetic, cooperate cyclone and high frequency shale shaker to carry out three sections closed circuit classifications of ore grinding,-200 order granularities reach 80%, carry out thick magnetic separation and smart magnetic separation with the low intensity magnetic separation machine of field intensity 1550Gs, obtain TFe content and be 57% iron ore concentrate 244t.
One, two, three sections magnetic tailing enters spiral chute respectively after cyclone concentrates, and obtains TiO
2Content is the titanium chats more than 37%, further goes out TiO through dry separation system (middle magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine selected and scan) dry separation
2Content is 47% ilmenite concentrate 38t.
Dry separation is selected titanium mine tailing and spiral mine tailing then to enter floatation system (the strong magnetic machine of high gradient enrichment+flotation device is roughly selected, scanned with selected) flotation and is obtained TiO
2Content is 47% ilmenite concentrate 31t; Total mine tailing enters the mine tailing storehouse and piles up.
The rate of recovery of iron ore concentrate is 63.22%, and the rate of recovery of ilmenite concentrate is 34.14%, and the screening cost of iron ore concentrate is 247 yuan/t, and the screening cost of ilmenite concentrate is 323 yuan/t.
It is 56% that the vanadium titano-magnetite of identical grade adopts mill rank, two sections rank to select the TFe content of iron gained iron ore concentrate, and the iron ore concentrate rate of recovery is 63.01%; Mine tailing selects the TiO of titanium gained ilmenite concentrate
2Content is 47%, and the ilmenite concentrate rate of recovery is 27.42%; The screening cost of iron ore concentrate is 251 yuan/t, and the screening cost of ilmenite concentrate is 400 yuan/t.
Embodiment 4 usefulness the inventive method screening high-grade vanadium titano-magnetite
Getting TFe is 30%, TiO
2Content is 11.5% vanadium titano-magnetite 1000t, ore reduction, screening, the ore grain size≤15mm behind the finished breaking.Ore after the fragmentation enters ball mill, cooperates spiral classifier to carry out the closed circuit classification of primary grinding, and ore pulp-200 order granularity reaches 30%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 3350Gs; One stages of magnetic separation concentrate enters two sections ball mills after taking off magnetic, cooperates spiral classifier to carry out the closed circuit classification of secondary grinding, and-200 order granularities reach 55%, carries out thick magnetic separation and sweeps magnetic separation with the low intensity magnetic separation machine of field intensity 1850Gs; Two stages of magnetic separation concentrate enter three sections ball mills after taking off magnetic, cooperate cyclone and high frequency shale shaker to carry out three sections closed circuit classifications of ore grinding,-200 order granularities reach 80%, carry out thick magnetic separation and smart magnetic separation with the low intensity magnetic separation machine of field intensity 1650Gs, obtain TFe content and be 57% iron ore concentrate 370t.
One, two, three sections magnetic tailing enters spiral chute respectively after cyclone concentrates, and obtains TiO
2Content is the titanium chats more than 37%, further goes out TiO through dry separation system (middle magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine selected and scan) dry separation
2Content is 47% ilmenite concentrate 64t.
Dry separation is selected titanium mine tailing and spiral mine tailing then to enter floatation system (the strong magnetic machine of high gradient enrichment+flotation device is roughly selected, scanned with selected) flotation and is obtained TiO
2Content is 47% ilmenite concentrate 45t; Total mine tailing enters the mine tailing storehouse and piles up.
The rate of recovery of iron ore concentrate is 70.30%, and the rate of recovery of ilmenite concentrate is 44.55%, and the screening cost of iron ore concentrate is 203 yuan/t, and the screening cost of ilmenite concentrate is 323 yuan/t.
It is 56% that the vanadium titano-magnetite of identical grade adopts mill rank, two sections rank to select the TFe content of iron gained iron ore concentrate, and the iron ore concentrate rate of recovery is 70.43%; Mine tailing selects the TiO of titanium gained ilmenite concentrate
2Content is 47%, and the ilmenite concentrate rate of recovery is 35.29%; The screening cost of iron ore concentrate is 205 yuan/t, and the screening cost of ilmenite concentrate is 370 yuan/t.
From embodiment 1～4 as can be seen, the iron ore concentrate of the inventive method screening and the rate of recovery of ilmenite concentrate are all higher, and the screening cost of iron ore concentrate and ilmenite concentrate is lower, and the screening technique of vanadium titano-magnetite of the present invention has broad application prospects.
Claims (6)
1. vanadium titano-magnetite screen method is characterized in that comprising the steps:
A, a stages of magnetic separation: ore is slightly broken to be pulverized to granularity≤15mm, and grading system gets-200 order granularities and reaches 30% ore pulp, and magnetic separation obtains a stages of magnetic separation concentrate and a stages of magnetic separation mine tailing under field intensity 3000～4000Gs;
B, two stages of magnetic separation: a step gained one stages of magnetic separation concentrate carries out the pulverizing second time after taking off magnetic, and grading system gets-200 order granularities and reaches 55% ore pulp, and magnetic separation obtains two stages of magnetic separation concentrate and two stages of magnetic separation mine tailings under field intensity 1800～2200Gs;
C, three stages of magnetic separation: pulverize for the third time after step b gained two stages of magnetic separation concentrate take off magnetic, grading system gets-200 order granularities and reaches 80% ore pulp, and magnetic separation obtains iron ore concentrate and three stages of magnetic separation mine tailings under field intensity 1200～1800Gs.
2. vanadium titano-magnetite screen method according to claim 1 is characterized in that: further comprising the steps of:
The screening of d, ilmenite concentrate: one, two, three sections magnetic tailing enters spiral chute after concentrating, and obtains titanium chats and spiral mine tailing, and the titanium chats obtains ilmenite concentrate and the titanium mine tailing is selected in dry separation through dry separation.
3. vanadium titano-magnetite screen method according to claim 2 is characterized in that: described dry separation is carried out selected for magnet drum ramming+weak magnet drum deironing+dry high-magnetic separation machine in adopting and is scanned.
4. vanadium titano-magnetite screen method according to claim 2 is characterized in that: dry separation selects titanium mine tailing and spiral mine tailing to adopt the strong magnetic machine of high gradient enrichment+flotation device to roughly select, scan and the selected ilmenite concentrate that obtains.
5. vanadium titano-magnetite screen method according to claim 1 is characterized in that: the field intensity of a stages of magnetic separation is 3000～3500Gs; The field intensity of two stages of magnetic separation is 1800～2000Gs; The field intensity of three stages of magnetic separation is 1200～1700Gs.
6. vanadium titano-magnetite screen method according to claim 5 is characterized in that: the field intensity of a stages of magnetic separation is 3500Gs; The field intensity of two stages of magnetic separation is 2000Gs; The field intensity of three stages of magnetic separation is 1600Gs.
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