CN102688806A - Dispersed flotation separation method for carbonate-containing iron ore - Google Patents

Dispersed flotation separation method for carbonate-containing iron ore Download PDF

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Publication number
CN102688806A
CN102688806A CN2012101835678A CN201210183567A CN102688806A CN 102688806 A CN102688806 A CN 102688806A CN 2012101835678 A CN2012101835678 A CN 2012101835678A CN 201210183567 A CN201210183567 A CN 201210183567A CN 102688806 A CN102688806 A CN 102688806A
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3min
iron ore
stir
add
carbonate
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邵安林
韩跃新
张明
张兆元
印万钟
韦锦华
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Angang Group Mining Co Ltd
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Angang Group Mining Co Ltd
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Abstract

The invention relates to a dispersed flotation separation method for carbonate-containing iron ore. The reverse flotation is directly carried out on carbonate-containing mixed magnetic separation iron ore concentrate, i.e. the rough concentration, the scavenging and the selection separation. Particularly, a roughing separation method comprises the following steps of: adjusting the mixed magnetic separation iron ore concentrate into ore pulp with the weight concentration of 20-40%, adding 200-1000g/t of dispersing agent-salinized water glass, adding 1200-2400g/t of inhibitor-starch, adding 400-1000g/t of activating agent-lime, and adding 600-1400g/t of collecting agent-KS-III. As the dispersing agent is added, the covering phenomenon among minerals can be eliminated or weakened, so that the ore pulp is under the stable dispersing status, the influence of the iron carbonate to the flotation can be weakened or reduced, and the iron ore concentrate of which the Fe grade is larger than 66% and the recovery rate is 65%-75% can be finally obtained. The method is simple in technological process and lower in cost.

Description

A kind of dispersion flotation separation method of carbonate containing iron ore
Technical field
The present invention relates to a kind of dispersion flotation separation method of carbonate containing iron ore.
Background technology
At present, the output of the present iron ore of China is difficult to satisfy the demand of steel industry, and the increase of iron-stone ore supply demand gap causes iron ore import interdependency to improve, and iron ore price rises suddenly and sharply.And the main feature of China's iron ore deposit is " poor ", " carefully ", " mixing ", and average grade is low, and the iron ore deposit proportion of complicated difficult choosing is bigger.At present, the bottleneck problem of iron ore deposit development and use is that iron ore-deposit is tending towards miniaturization, complicated and low dilution, and the iron concentrate grade and the rate of recovery are lower, are difficult to satisfy low-cost requirement of smelting, and the ferrous metal loss is serious.The reason that complicated iron ore is difficult to sorting is that valuable mineral embedding cloth is thinner, the symbiosis complicacy; Be difficult for monomer dissociation, or suitably dissociate mineral are effectively separated, its reason is that fine mineral or gangue generation non-selectivity are reunited; Or cover cap takes place in mineral each other, the separation selectivity of valuable mineral and gangue mineral reduced greatly, like the increase of carbonate content in the Anshan Area iron ore; Cause floatation indicators to descend, the serious result that smart tail is regardless of occurs.Exactly because its reason microfine siderite is due to bloodstone and quartz surfaces cover cap.China's carbonate containing iron ore reserves reach more than 5,000,000,000 tons, and Anshan Area is had an appointment 1,000,000,000 tons, if this problem can be resolved, with alleviating the nervous situation of China's iron resource greatly.To the difficult separate study of selecting the carbonate containing iron ore; Chinese patent 200810011418.7 has adopted the stepped-flotation separation isolation technics; The first step adopts direct floatation process sorting siderite concentrate under neutrallty condition; Second step was adopted reverse floatation process separating hematite concentrate under strong alkaline condition, and the grade that its second step is selected bloodstone is greater than 66%, and the rate of recovery is greater than 62%.Because the stepped-flotation separation techniqueflow is complicated, it is various to add the medicament number of times, and cost is higher, and therefore to complicated iron ore, especially carbonate containing iron ore development process technology simple, with low cost has important practical significance.
Summary of the invention
The dispersion flotation separation method that the purpose of this invention is to provide a kind of carbonate containing iron ore.
The objective of the invention is to realize through following technical proposals:
Disperse flotation separation method according to carbonate containing iron ore of the present invention, undertaken by following method step:
(1) ball milling: with carbonate containing mineral content 1~6%, the iron ore of Fe grade 25~32%, ball milling to fineness accounts for 85~95% of whole material gross weights less than the part of 0.074mm;
(2) magnetic separation: adopt drum magnetic separator to carry out low intensity magnetic separation and Slon pulsating high gradient magnetic separator with vertical ring; Carry out the method for high intensity magnetic separation; Levigate ore is separated in advance, obtain ferrous grade and be 38~45%, carbonate mineral content is 2~8% mixing magnetic separation of iron ore concentrate;
(3) reverse flotation method and step are following:
A, roughly select: mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 20~40%, feed and roughly select operation, slurry temperature is controlled at 30~45 ℃, under the low whipping speed 2800rpm condition, pH values of pulp is transferred to 9~11, stirs 2~3min; Add dispersant, and stir 2~3min, dispersant dosage is 200~1000g/t; Add inhibitor, and stir 2~3min, the inhibitor consumption is 1200~2400g/t; Add activator, and stir 2~3min, activator level is 400~1000g/t; Add collecting agent at last, and stir 2~3min, collector dosage is 600~1400g/t, roughly selects 4~5min;
B, scan: the mine tailing mass concentration of roughly selecting acquisition is controlled at 15~20%, feeds and scans operation, carries out 1~3 time and scans; Scan at every turn and earlier pH values of pulp is transferred to 9~11, add inhibitor then, stir 2~3min; The inhibitor consumption is 50~100g/t, scans 2~3min;
C, selected: the concentrate of roughly selecting acquisition carry out 1~3 time selected, each selected activator that adds earlier, low whipping speed are to stir 2~3min under the condition of 2800rpm, activator level is 200~600g/t; Add collecting agent then, stir 2~3min, collector dosage is 200~500g/t, and selected 1.5~2min obtains final iron ore concentrate;
In the reverse flotation method step selected with scan, adopt continuous flotation separation method following:
When rough concentrate carried out primary cleaning, the concentrate that mine tailing that primary cleaning obtains and once purging selection obtain mixed with the magnetic concentrate ore pulp that mixes that adds pH adjustment agent, dispersant, inhibitor, activator and collecting agent, roughly selects jointly;
When rough concentrate carries out twice when selected, the concentrate that the mine tailing that primary cleaning obtains and once purging selection obtain with add that pH adjusts agent, dispersant, inhibitor, activator and collecting agent mix the mixing of magnetic concentrate ore pulp, roughly select jointly; The mine tailing that recleaning obtains mixes with the rough concentrate that adds activator and collecting agent, carries out primary cleaning jointly;
When rough concentrate carried out triple cleaning, the concentrate that mine tailing that primary cleaning obtains and once purging selection obtain mixed with the magnetic concentrate ore pulp that mixes that adds pH adjustment agent, dispersant, inhibitor, activator and collecting agent, roughly selects jointly; The mine tailing that recleaning obtains mixes with the rough concentrate that adds activator and collecting agent, carries out primary cleaning jointly; The mine tailing that triple cleaning obtains mixes with the primary cleaning concentrate that adds activator and collecting agent, carries out primary cleaning jointly;
When rougher tailings carried out once purging selection, the mine tailing that concentrate that once purging selection obtains and primary cleaning obtain mixed with the magnetic concentrate ore pulp that mixes that adds pH adjustment agent, dispersant, inhibitor, activator and collecting agent, roughly selects jointly;
When rougher tailings carried out scanning for twice, the mine tailing that concentrate that once purging selection obtains and primary cleaning obtain mixed with the magnetic concentrate ore pulp that mixes that adds pH adjustment agent, dispersant, inhibitor, activator and collecting agent, roughly selects jointly; The concentrate that secondary is scanned acquisition mixes with the rougher tailings that adds inhibitor, carries out once purging selection jointly;
When rougher tailings carried out scanning for three times, the mine tailing that concentrate that once purging selection obtains and primary cleaning obtain mixed with the magnetic concentrate ore pulp that mixes that adds pH adjustment agent, dispersant, inhibitor, activator and collecting agent, roughly selects jointly; The concentrate that secondary is scanned acquisition mixes with the rougher tailings that adds inhibitor, carries out once purging selection jointly; The concentrate of scanning acquisition for three times mixes with the once purging selection mine tailing that adds inhibitor, carries out once purging selection jointly;
Wherein, pH adjustment agent is NaOH or sodium carbonate, when adopting NaOH to do pH adjustment agent, pH values of pulp is transferred to 10~11, when adopting sodium carbonate to do pH adjustment agent, pH values of pulp is transferred to 9~10;
Dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, its aqueous solution weight concentration 1~3%;
Inhibitor is starch or dextrin;
Activator is CaO, i.e. common lime;
Collecting agent is the KS-III, and its structural formula is:
R——CH——?CH——?SO 3H
││
NH 2 COOH
Wherein, R is that carbon number is 14~18 alkyl.
Disperseing flotation separation method according to carbonate containing iron ore of the present invention, it is characterized in that its dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, and its aqueous solution weight concentration is 2%.
Disperse flotation separation method according to carbonate containing iron ore of the present invention, it is characterized in that, be applied to carbonate mineral content 1~6%, Fe grade 25~32%, SiO 233~35%, surplus is that the iron ore of impurity disperses FLOTATION SEPARATION, obtains main component and contains Fe 65~68%, SiO by weight percentage 2<5% iron ore concentrate, its Fe rate of recovery are 65~75% by weight percentage.
Disperse flotation separation method according to carbonate containing iron ore of the present invention, it is characterized in that the reverse flotation method step is following:
A, roughly select: mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 20~40%, feed and roughly select operation, slurry temperature is controlled at 35~45 ℃, under the low whipping speed 2800rpm condition, pH values of pulp is transferred to 10~11, stirs 2~3min; Add dispersant and stir 2~3min, dispersant dosage is 400~1000g/t; Add inhibitor and stir 2~3min, the inhibitor consumption is 1400~2400g/t; Add activator and stir 2~3min, activator level is 400~1000g/t; Add collecting agent at last and stir 2~3min, collector dosage is 600~1400g/t, roughly selects 4~5min;
B, scan: the mine tailing mass concentration of roughly selecting acquisition is controlled at 15~20%, feeds and scans operation, carries out 1~3 time and scans; Scan at every turn and earlier pH values of pulp is transferred to 10~11, add inhibitor then, stir 2~3min; The inhibitor consumption is 50~100g/t, scans 2~3min;
C, selected: the concentrate of roughly selecting acquisition carry out 1~3 time selected, each selected activator that adds earlier, low whipping speed are to stir 2~3min under the condition of 2800rpm, activator level is 200~600g/t; Add collecting agent then, stir 2~3min, collector dosage is 200~500g/t, and selected 1.5~2min obtains final iron ore concentrate;
In the reverse flotation method step selected with scan, adopt above-mentioned continuous flotation separation method;
Wherein, pH adjustment agent is a NaOH, and pH values of pulp is transferred to 10~11;
Dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, and its aqueous solution weight concentration is 2%;
Inhibitor is a starch;
Activator is a common lime;
Collecting agent is the KS-III, and its structural formula is:
R——CH——?CH——?SO 3H
││
NH 2 COOH
R is that carbon number is 16 alkyl.
Disperse flotation separation method according to carbonate containing iron ore of the present invention, it is characterized in that, in the reverse flotation to roughly select method step following:
Mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 20~40%, feed and roughly select operation, slurry temperature is controlled at 38~42 ℃, under the low whipping speed 2800rpm condition, pH values of pulp is transferred to 11, stirs 2~3min; Add dispersant and stir 2~3min, dispersant dosage is 500~800g/t; Add inhibitor and stir 2~3min, the inhibitor consumption is 1600~2200g/t; Add activator and stir 2~3min, activator level is 400~800g/t; Add collecting agent at last and stir 2~3min, collector dosage is 800~1200g/t, roughly selects 4~5min,
Wherein, pH adjustment agent, dispersant, inhibitor, activator, collecting agent are with the above.
Disperse flotation separation method according to carbonate containing iron ore of the present invention, it is characterized in that, be applied to main component and contain Fe 38~45%, SiO by weight percentage 233~35%, carbonate mineral content is 2~8% mixing magnetic separation of iron ore concentrate dispersion FLOTATION SEPARATION, obtains main component and contains Fe 66~68%, SiO by weight percentage 2<4% iron ore concentrate, its Fe rate of recovery are 70~75% by weight percentage.
Advantage of the present invention is:
The dispersion flotation separation method of carbonate containing iron ore of the present invention; The carbonate containing iron ore is carried out direct reverse flotation separate,, eliminate or weaken the cover cap phenomenon between mineral through adding the mode of dispersant; Make ore pulp be in stable dispersity; Weaken or eliminated the influence of ferric carbonate to flotation, technological process is simple, and cost is lower.Handled ore, can reach the metallurgical industry primary standard (is Fe>=64.00%, SiO 2≤8%); To the low-grade iron ore potential resource of China's carbonate containing iron ore, a kind of economical rationality utilization methods is provided.
Description of drawings:
Fig. 1 is the dispersion flotation separation method schematic flow sheet of carbonate containing iron ore of the present invention.
The specific embodiment
In the embodiments of the invention, adopting floatation equipment is XFD-63 type single-channel type flotation device, and float test is selected the miniature closed circuit continuous flotator of XFLB type for use continuously.
The used medicament of sizing mixing in the embodiment of the invention is:
PH adjustment agent is a NaOH, and pH values of pulp is transferred to 11; Dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, and its aqueous solution weight concentration is 2%; Inhibitor is a conventional corn starch; Activator is CaO, i.e. common lime; Collecting agent is the KS-III, and its structural formula is:
R——CH——?CH——?SO 3H
││
NH 2 COOH
R is that carbon number is 14~18 alkyl.
The carbonate containing iron ore of selecting for use in the embodiment of the invention is carbonate containing mixing magnetic separation of iron ore concentrate, and the preparation method of this mixing magnetic separation of iron ore concentrate is: with carbonate mineral content be 1~6%, the Fe grade is 25~32% iron ore; At first adopt ball grinder graded method that grinde ore to fineness is partly accounted for ore total amount 85~95% less than 0.074mm; Adopt the method for low intensity magnetic separation and high intensity magnetic separation that ore is separated in advance then, obtain ferrous grade and be 38~45%, carbonate mineral content is 2~8% mixing magnetic separation of iron ore concentrate, its main component contains Fe 42.97% by weight percentage; FeO 6.29%; CaO 0.31%, and MgO 0.45%, Al 2O 30.81%, SiO 233.60%, S 0.029%, and P 0.075%.It mainly contains and uses iron mineral to be bloodstone and a spot of siderite and magnetic iron ore, the ankerite that gangue mineral is mainly quartz, chlorite and is prone to argillization on a small quantity.
Embodiment 1:Adopt following reverse flotation method step:
Mix the smart ore pulp mass concentration of magnetic separation iron and be controlled at 25%, feed and roughly select operation, its slurry temperature is controlled at 38~42 ℃, under the low whipping speed 2800rpm condition; Add NaOH, pH values of pulp is transferred to 11, stir 3min, add salinization waterglass; And stirring 3min, the consumption of salinization waterglass is 800g/t, adds starch, and stirs 3min; The consumption of starch is 2200g/t, adds lime, and stirs 3min, and the consumption of lime is 600g/t; Add the KS-III at last, and stir 3min, the consumption of KS-III is 1000g/t, roughly selects 4.5min;
The mine tailing mass concentration of roughly selecting acquisition is controlled at 20%, feeds and scans operation, carries out 2 times and scans, and once purging selection adds NaOH earlier, and pH values of pulp is transferred to 11, adds starch then, stirs 2min, and the starch consumption is 100g/t, scans 2min; Secondary is scanned, and adds NaOH earlier, and pH values of pulp is transferred to 11, adds starch, stirs 2min, and the consumption of starch is 50g/t, scans 2min;
Roughly select the concentrate of acquisition, carry out 2 times selected, during primary cleaning, add earlier lime, low whipping speed is to stir 2min under the condition of 2800rpm; The consumption of lime is 400g/t, adds the KS-III then, stirs 2min, and the consumption of KS-III is 500g/t, selected 2min; During recleaning, add lime, stir 2min, the consumption of lime is 200g/t; Add the KS-III then, stir 2min, the consumption of KS-III is 250g/t, selected 2min;
Selected in the reverse flotation step adopts continuous flotation separation method following with scanning:
The concentrate that once purging selection obtains, the mine tailing that obtains with raw ore slurry that adds NaOH, salinization waterglass, starch, lime and KS-III and primary cleaning mixes, and roughly selects; Secondary is scanned the concentrate of acquisition, mixes with the rougher tailings that adds starch, carries out once purging selection;
The mine tailing that primary cleaning obtains, the concentrate that obtains with raw ore slurry that adds NaOH, salinization waterglass, starch, lime and KS-III and once purging selection mixes, and roughly selects; The mine tailing that recleaning obtains mixes with the rough concentrate that adds lime and KS-III, carries out primary cleaning.
Embodiment 2
Transfer pulp density and the amount of adding medicament to be:
Mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 35%, give people's flotation operation, the consumption that adds salinization waterglass is 600g/t, and the consumption that adds starch is 1800g/t, and the consumption that adds lime is 500g/, and the consumption that adds the KS-III is 800g/t;
The rougher tailings mass concentration of roughly selecting acquisition is controlled at 20%, and carry out 2 times and scan, once purging selection, the consumption that adds starch is 100g/t, and secondary is scanned, and the consumption that adds starch is 50g/t;
Roughly select acquisition roughly select concentrate carry out 2 times selected, primary cleaning, the consumption that adds lime is 200g/t, the consumption that adds the KS-III is 400g/t, recleaning, the consumption that adds lime is 200g/t, the consumption that adds the KS-III is 200g/t.
All the other reverse flotation methods and step are with embodiment 1.
Embodiment 3
Transfer pulp density and the amount of adding medicament to be:
Mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 30%, feed flotation operation, the consumption that adds salinization waterglass is 800g/t, and the consumption that adds starch is 2000g/t, and the consumption that adds lime is 800g/t, and the consumption that adds the KS-III is 1200g/t;
The rougher tailings mass concentration of roughly selecting acquisition is controlled at 20%, feeds and scans operation, and carry out 2 times and scan, once purging selection, the consumption that adds starch is 100g/t, and secondary is scanned, and the consumption that adds starch is 50g/t;
Roughly select the concentrate of acquisition, carry out 2 times selected, primary cleaning, the consumption that adds lime is 500g/t, the consumption that adds the KS-III is 500g/t, recleaning, the consumption that adds lime is 300g/t, the consumption that adds the KS-III is 300g/t.
All the other reverse flotation methods and step are with embodiment 1.
The result of the test that obtains according to embodiment 1,2 and 3 methods is shown in table 1, table 2 and table 3.
Table 1 embodiment 1 disperses flotation, continuous FLOTATION SEPARATION result of the test
Embodiment 1 obtains final iron ore concentrate, and its main component is by weight percentage for containing Fe 66.26%, SiO 23.17%, the Fe rate of recovery is 70.23%
Table 2 embodiment 2 disperses flotation, continuous FLOTATION SEPARATION result of the test
Embodiment 2 obtains final iron ore concentrate, and its main component is by weight percentage for containing Fe 66.20%, SiO 23.43%, the Fe rate of recovery is 71.52%.
Table 3 embodiment 3 disperses flotation, continuous FLOTATION SEPARATION result of the test
Embodiment 3 obtains final iron ore concentrate, and its main component is by weight percentage for containing Fe 65.25%, SiO 24.53%, the Fe rate of recovery is 72.12%.

Claims (6)

1. a carbonate containing iron ore disperses flotation separation method, is undertaken by ball milling, magnetic separation and reverse flotation method and step, it is characterized in that reverse flotation method and step are following:
A, roughly select: mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 20~40%, feed and roughly select operation, slurry temperature is controlled at 30~45 ℃, under the low whipping speed 2800rpm condition, pH values of pulp is transferred to 9~11, stirs 2~3min; Add dispersant, and stir 2~3min, dispersant dosage is 200~1000g/t; Add inhibitor, and stir 2~3min, the inhibitor consumption is 1200~2400g/t; Add activator, and stir 2~3min, activator level is 400~1000g/t; Add collecting agent at last, and stir 2~3min, collector dosage is 600~1400g/t, roughly selects 4~5min;
B, scan: the mine tailing mass concentration of roughly selecting acquisition is controlled at 15~20%, feeds and scans operation, carries out 1~3 time and scans; Scan at every turn and earlier pH values of pulp is transferred to 9~11, add inhibitor then, stir 2~3min; The inhibitor consumption is 50~100g/t, scans 2~3min;
C, selected: roughly select the concentrate of acquisition, carry out 1~3 time selected, each selected activator that adds earlier, low whipping speed are to stir 2~3min under the condition of 2800rpm, activator level is 200~600g/t; Add collecting agent then, stir 2~3min, collector dosage is 200~500g/t, and selected 1.5~2min obtains final iron ore concentrate;
In the said reverse flotation method step selected with scan, adopt continuous flotation separation method;
Wherein, pH adjustment agent is NaOH or sodium carbonate, when adopting NaOH to do pH adjustment agent, pH values of pulp is transferred to 10~11, when adopting sodium carbonate to do pH adjustment agent, pH values of pulp is transferred to 9~10;
Dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, and its aqueous solution weight concentration is 1~3%;
Inhibitor is a starch;
Activator is a common lime;
Collecting agent is the KS-III, and its structural formula is:
R——CH——?CH——?SO 3H
││
NH 2 COOH
R is that carbon number is 14~18 alkyl.
2. carbonate containing iron ore according to claim 1 disperses flotation separation method, it is characterized in that its dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, and its aqueous solution weight concentration is 2%.
3. carbonate containing iron ore according to claim 1 disperses flotation separation method, it is characterized in that, is applied to carbonate mineral content 1~6%, Fe grade 25~32%, SiO 233~35%, surplus is that the iron ore of impurity disperses FLOTATION SEPARATION, obtains main component and contains Fe 65~68%, SiO by weight percentage 2<5% iron ore concentrate, its Fe rate of recovery are 65~75% by weight percentage.
4. carbonate containing iron ore according to claim 1 disperses flotation separation method, it is characterized in that reverse flotation method and step are following:
A, roughly select: mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 20~40%, feed and roughly select operation, slurry temperature is controlled at 35~45 ℃, under the low whipping speed 2800rpm condition, pH values of pulp is transferred to 10~11, stirs 2~3min; Add dispersant, and stir 2~3min, dispersant dosage is 400~1000g/t; Add inhibitor, and stir 2~3min, the inhibitor consumption is 1400~2400g/t; Add activator, and stir 2~3min, activator level is 400~1000g/t; Add collecting agent at last, and stir 2~3min, collector dosage is 600~1400g/t, roughly selects 4~5min;
B, scan: the mine tailing mass concentration of roughly selecting acquisition is controlled at 15~20%, feeds and scans operation, carries out 2~3 times and scans; Scan at every turn and earlier pH values of pulp is transferred to 10~11, add inhibitor then, stir 2~3min; The inhibitor consumption is 50~100g/t, scans 2~3min;
C, selected: the concentrate of roughly selecting acquisition carry out 2~3 times selected, each selected activator that adds earlier, low whipping speed are to stir 2~3min under the condition of 2800rpm, activator level is 200~600g/t; Add collecting agent then, stir 2~3min, collector dosage is 200~500g/t, and selected 1.5~2min obtains final iron ore concentrate;
In described reverse flotation method and the step selected with scan, adopt continuous flotation separation method;
Wherein, pH adjustment agent is a NaOH, and pH values of pulp is transferred to 10~11;
Dispersant is a salinization waterglass, is the solution that waterglass and aluminum sulfate are mixed with by mass ratio 5:1, and its aqueous solution weight concentration is 2%;
Inhibitor is a starch;
Activator is a common lime;
Collecting agent is the KS-III, and its structural formula is:
R——CH——?CH——?SO 3H
││
NH 2 COOH
R is that carbon number is 16 alkyl.
5. carbonate containing iron ore according to claim 4 disperses flotation separation method, it is characterized in that, in the reverse flotation roughly select method and step is following:
Mix the magnetic separation of iron ore concentrate mass concentration and be controlled at 20~40%, feed and roughly select operation, slurry temperature is controlled at 38~42 ℃, under the low whipping speed 2800rpm condition, pH values of pulp is transferred to 11, stirs 2~3min; Add dispersant, and stir 2~3min, dispersant dosage is 500~800g/t; Add inhibitor, and stir 2~3min, the inhibitor consumption is 1600~2200g/t; Add activator, and stir 2~3min, activator level is 400~800g/t; Add collecting agent at last, and stir 2~3min, collector dosage is 800~1200g/t, roughly selects 4~5min,
Wherein, pH adjustment agent, dispersant, inhibitor, activator, collecting agent are with claim 4.
6. disperse flotation separation method according to claim 4 or 5 described carbonate containing iron ores, it is characterized in that, be applied to main component and contain Fe 38~45%, SiO by weight percentage 233~35%, carbonate mineral content is 2~8% mixing magnetic separation of iron ore concentrate dispersion FLOTATION SEPARATION, obtains main component and contains Fe 66~68%, SiO by weight percentage 2<4% iron ore concentrate, its Fe rate of recovery are 70~75% by weight percentage.
CN2012101835678A 2012-06-06 2012-06-06 Dispersed flotation separation method for carbonate-containing iron ore Pending CN102688806A (en)

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CN103056035A (en) * 2012-11-15 2013-04-24 中国海洋石油总公司 Carbonate inhibitor and preparation method and application thereof
CN103357500A (en) * 2013-07-17 2013-10-23 内蒙古科技大学 Ore-dressing method for recovering iron from Bayan Obo mine tailing
CN103386369A (en) * 2013-07-17 2013-11-13 内蒙古科技大学 Ore dressing method for iron ore concentrate floatation in Bayan Obo tailings
CN103464287A (en) * 2013-09-05 2013-12-25 鞍钢集团矿业公司 Flocculation desliming and acidic flotation method for iron carbonate ore fine-grained products
CN103691566A (en) * 2013-12-17 2014-04-02 广西大学 Method for performing flotation separation on garnet from magnetic separation brown iron ore concentrate
CN103934099A (en) * 2014-04-28 2014-07-23 东北大学 Method for lowering content of magnesium in pentlandite concentrate
CN104226487A (en) * 2014-08-08 2014-12-24 西北矿冶研究院 Composite inhibitor for silicate gangue minerals
CN105268542A (en) * 2015-11-25 2016-01-27 东北大学 Substep disperse synergetic flotation separation method of micro-fine particle embedded hematite iron ore including carbonate
CN103357500B (en) * 2013-07-17 2016-11-30 内蒙古科技大学 A kind of beneficiation method of Bayan Obo mining tailing ferrum
CN106824507A (en) * 2016-12-19 2017-06-13 东北大学 The method for separating that a kind of floating stage agent addition reinforcing particulate weak magnetic iron mineral of magnetic is reclaimed
CN110465404A (en) * 2018-05-09 2019-11-19 中国瑞林工程技术有限公司 The method for handling carbonate containing iron selection tailings
CN110479496A (en) * 2019-09-20 2019-11-22 鞍钢集团矿业有限公司 A kind of compound amphoteric collector of iron ore reverse flotation and its application

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CN103934099A (en) * 2014-04-28 2014-07-23 东北大学 Method for lowering content of magnesium in pentlandite concentrate
CN104226487A (en) * 2014-08-08 2014-12-24 西北矿冶研究院 Composite inhibitor for silicate gangue minerals
CN105268542A (en) * 2015-11-25 2016-01-27 东北大学 Substep disperse synergetic flotation separation method of micro-fine particle embedded hematite iron ore including carbonate
CN106824507A (en) * 2016-12-19 2017-06-13 东北大学 The method for separating that a kind of floating stage agent addition reinforcing particulate weak magnetic iron mineral of magnetic is reclaimed
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CN110479496A (en) * 2019-09-20 2019-11-22 鞍钢集团矿业有限公司 A kind of compound amphoteric collector of iron ore reverse flotation and its application
CN110479496B (en) * 2019-09-20 2021-02-26 鞍钢集团矿业有限公司 Iron ore reverse flotation composite amphoteric collecting agent and application thereof

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