CN112676030A - Ore dressing method for Dongshan mixed magnetic concentrate - Google Patents
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Abstract
The invention provides a beneficiation method of mixed magnetic concentrate of east Anshan mountain, which specifically relates to the following steps: the mixed magnetic separation iron ore concentrate obtained through weak magnetic and strong magnetic pre-separation is reprocessed by adopting a step flotation process of 'direct flotation firstly-reverse flotation secondly', wherein the reverse flotation process adopts a process flow of one coarse flotation, one fine flotation and three scavenging, the flotation reagent system is optimized, the using amount of a collecting agent and an activating agent in the flotation reagent is reduced, and meanwhile, the production index of ore concentrate grade of more than 65% is achieved, so that the production cost of a separation plant is reduced, and the economic benefit is improved. The invention has the advantages that: 1) the flow is simplified, the dosage of a flotation reagent is optimized, and the mineral separation production cost is reduced; 2) obtaining products with ore grade of more than 65%; 3) the economical efficiency is good, and the comprehensive economic benefit of plant selection is improved.
Description
Technical Field
The invention belongs to the technical field of metal mine beneficiation, and particularly relates to a beneficiation method for subsequent beneficiation flow of mixed magnetic concentrate and optimization of a flotation reagent system.
Background
The iron ore is a main production raw material of the iron and steel industry, the hematite/magnetite ore is the carbonate-containing iron ore when containing carbonate-containing minerals such as siderite and the like, the iron mine has about 10 hundred million tons of reserves in the Ansheng area, the reserve of Ansheng is the largest and about 5 hundred million tons, and the iron mine has the characteristics of multiple mineral varieties, complex structure, fine disseminated particle size and the like, and the mineral composition is constantly changed in the process of annual mining, so that mineral separation is relatively difficult. With the increasing scarcity of iron ore resources and the increasing demand in steel, the development of an efficient ore dressing method for the Dongshan iron ore is a technical problem of key research.
Research aiming at the property of the tonnage has found that: the average embedded particle size of the iron mineral is 13-30 μm, the embedded particle size of the gangue mineral quartz is relatively coarse, the average embedded particle size is about 15-33 μm, Fe element in the ore is mainly distributed in hematite and magnetite, the distributed content is about 83%, and the Fe element is distributed in siderite and chlorite, the distributed content is about 8% and 6%; the gangue minerals comprise chlorite, clinoptilolite, natrium amphibole, illite, albite, dolomite, hornblende, calcite, celsian, rectus amphibole, biotite, orthoclase and the like besides quartz, and the gangue minerals have complex compositions, relatively low hardness and are easy to argillize; in the mixed magnetic separation iron ore concentrate in the Dongshan, the embedded granularity of the mixed magnetic separation iron ore concentrate is fine, the granularity of 80 percent of materials is less than 32.07 mu m, and the granularity of gangue minerals is finer and easy to argillization; the proportion of the iron mineral reaching more than 80 percent of monomer dissociation degree is more than 91 percent, and the proportion of the iron mineral reaching 100 percent of monomer dissociation degree is less than 23 percent; the separation difficulty of the iron ore concentrate in the flotation operation is increased.
Production practices of the magnetic separation iron ore concentrate flotation operation of the Dongshan mixed magnetic separation in recent years show that 1, because the phenomenon of argillization of the iron ore concentrate of the mixed magnetic separation is serious, in order to solve the problem in the original flotation process flow, an inhibitor, a dispersant and a collector are added in the positive flotation, and the dosage of a reagent in the reverse flotation process is also larger, so that the use cost of the flotation reagent is increased, and the comprehensive economic benefit of a concentrating mill is reduced; 2. the carbonate mineral of iron in the mixed magnetic separation iron concentrate after the positive flotation needs to be subjected to a roughing separation and a scavenging separation process, and the concentrate needs to be returned to the reverse flotation roughing ore feeding, so that the treatment process is complex, and a large amount of chemicals need to be consumed.
Disclosure of Invention
The invention aims to solve the problems of complex flow and excessive medicament dosage in the subsequent flotation operation process of the Dongshan mixed magnetic concentrate, and provides a beneficiation method of the Dongshan mixed magnetic concentrate, which optimizes the medicament dosage in the flotation process, reduces the production cost, stabilizes the production index and ensures that the grade of iron concentrate reaches more than 65%.
The invention is carried out according to the following technical scheme:
the ore dressing method of the Dongshan mixed magnetic concentrate is characterized in that the Dongshan mixed magnetic concentrate is a mixed magnetic separation iron concentrate obtained by performing low-intensity magnetic separation and high-intensity magnetic separation on Dongshan iron ore, useful minerals in the mixed magnetic separation iron concentrate are carbonate minerals of hematite, magnetite and iron, main gangue minerals are quartz and chlorite, the iron grade is 45% -47%, the content of particles dissociated by more than 80% of monomers is more than 90%, the part of the materials with the particle size of less than 0.074mm accounts for 90% -98% of an ore feeding material, and the content of the carbonate minerals of the iron is less than 10%; the method comprises the following steps:
1) adding water into the east Anshan mixed magnetic concentrate to prepare ore pulp with the weight concentration of 20-30%;
2) carrying out primary direct flotation and rough concentration on siderite: adding the ore pulp into flotation equipment, adding inhibitor starch, wherein the adding amount of the starch is 400-450g/t ore pulp, adding collecting agent TD-II, wherein the adding amount of the TD-II is 100-150g/t ore pulp, and then performing direct flotation to obtain siderite middling and direct flotation tailings with the iron grade of more than 40%; wherein the siderite middlings are directly discarded or further processed separately;
3) and (3) reverse flotation roughing: performing size mixing on the positive flotation tailings to obtain positive flotation tailing pulp with the weight concentration of 20-30%, adding sodium hydroxide serving as a pH value regulator to adjust the pH value of the positive flotation tailing pulp to 11.5-12, adding inhibitor starch, wherein the adding amount of starch is 780-800g/t tailing pulp, adding an activator calcium oxide, the adding amount of the calcium oxide is 180-200g/t tailing pulp, adding a collecting agent TD-II, the adding amount of the TD-II is 400-800g/t tailing pulp, and performing reverse flotation roughing to obtain reverse flotation roughing concentrate with the iron grade of 60-62% and reverse flotation roughing tailings with more quartz;
4) carrying out reverse flotation concentration on the reverse flotation roughing concentrates for 1 time to obtain hematite concentrates and reverse flotation concentration tailings, and returning the reverse flotation concentration tailings to the positive flotation tailing pulp for secondary enrichment of reverse flotation roughing; and (3) carrying out scavenging on the reverse flotation roughed tailings for 2-3 times to obtain the final flotation iron concentrate with the TFe grade of more than 65% and the recovery rate of not less than 72%.
In the method for beneficiation of the Dongshan mixed magnetic concentrate, the reverse flotation roughing concentrate is subjected to reverse flotation concentration for 1 time, specifically, the reverse flotation roughing concentrate is blended into reverse flotation roughing concentrate pulp with the weight concentration of 20% -30%, collecting agent TD-II is added, and the addition amount of TD-II is 380-420 g/t.
In the method for dressing the Dongshan mixed magnetic concentrate, the reverse flotation rougher tailings are scavenged for 2-3 times, specifically, the reverse flotation rougher tailings are blended into reverse flotation rougher tailing pulp with the weight concentration of 20% -30%, and no flotation agent is required to be additionally added in each scavenging.
Further, in the method for concentrating the mixed magnetic concentrate in the Dongshan, the temperature of ore pulp for positive flotation, reverse flotation roughing and reverse flotation concentration is 33-35 ℃.
Compared with the prior art, the invention has the advantages that:
1. because the part of the mixed magnetic separation concentrate material with the granularity of less than 0.074mm accounts for 90-98% of the ore feeding material, and the carbonate mineral and the gangue mineral containing iron are easy to argillize and are not easy to separate from the magnetic/hematite concentrate in the flotation and reverse flotation processes, in the original process flow, a technician adds an inhibitor, a dispersant and a collector in the positive flotation process according to the guidance of the existing theory to improve the separation degree of argillization components and the magnetic/hematite concentrate, thereby leading to higher addition of a reverse flotation reagent. The invention finds that in the direct flotation and the reverse flotation, the higher iron grade and the higher recovery rate of the final iron concentrate product can be realized without adding a large amount of reagents. The data show that compared with the prior production process technology, under the condition that the iron grade and the recovery rate of the final iron ore concentrate product are unchanged, the using amount of the flotation reagent is obviously reduced, under the condition of optimal using amount, the using amount of starch of a forward flotation inhibitor is reduced by about 190g/t, the using amount of water glass of a forward flotation dispersant is reduced by about 60g/t, the using amount of TD-II of the forward flotation collector is reduced by about 90g/t, the using amount of water glass of a middling roughing dispersant in forward flotation is reduced by about 210g/t, the using amount of calcium oxide of a reverse flotation activator is reduced by about 650g/t, and the using amount of TD-II of the reverse flotation collector is reduced by about 350.
2. The original flotation process flow is improved, siderite obtained by the positive flotation is not returned to the process for separation, siderite middlings can be directly discarded or independently treated, and the process flow is reduced.
Drawings
FIG. 1 and comparative example 1 show the flow chart of the beneficiation method of the Zhongdong Anshan mixed magnetic concentrate.
FIG. 2 is a flow chart of a beneficiation method of the magnetic concentrate mixed in the Zhongdong Anshan in the embodiment 1.
Detailed Description
The inhibitors adopted in the embodiment of the invention are all common corn starch; the adopted activator calcium oxide is common lime; the pH value regulator sodium hydroxide of ore pulp is adopted as an industrial grade product; the adopted direct flotation collector TD-II is provided for the Annamo steel group mining company; the reverse flotation collector TD-II is provided for the Annu Steel group mining company;
the adopted flotation equipment for the forward flotation and the reverse flotation is an RK/FD type single-groove flotation machine;
the magnetic separation method comprises the steps of adopting the Dongshan mixed magnetic concentrate, namely the Dongshan iron ore, performing low-intensity magnetic separation and high-intensity magnetic separation treatment to obtain the mixed magnetic iron concentrate, wherein useful minerals in the mixed magnetic iron concentrate are hematite, magnetite and iron carbonate minerals, main gangue minerals are quartz and chlorite, the iron grade is 45-47%, the content of particles dissociated by more than 80% of monomers is more than 90%, the part with the particle size of less than 0.074mm in the materials accounts for 90-98% of ore feeding materials, and the content of the iron carbonate minerals is less than 10%.
Comparative example 1
A beneficiation method of a mixed magnetic concentrate of east Anshan mountain, which is shown in figure 1.
Adding water into mixed magnetic separation iron ore concentrate with iron grade of 43 percent and granularity of less than 0.074mm, wherein the mixed magnetic separation iron ore concentrate accounts for 98 percent of feed material and contains 7.5 percent of carbonate mineral of iron, preparing ore pulp solution with weight concentration of 30 percent, adding the ore pulp into flotation equipment, stirring for 3min after adjusting the stirring speed to 2000rpm, then adding inhibitor starch, stirring for 3min, adding 590.215g/t of the ore pulp of starch, then adding dispersant water glass, stirring for 3min, adding 57.837g/t of the ore pulp of water glass, adding collector TD-II, stirring for 3min, adding 200.147g/t of the ore pulp of TD-II, and then carrying out positive flotation on the ore pulp at 33-35 ℃ to obtain siderite with iron grade of 30.19 percent and positive flotation tailings;
performing size mixing on the positive flotation tailings to obtain positive flotation tailing pulp with the weight concentration of 30%, adding sodium hydroxide to adjust the pH value of the tailing pulp to 11.5, stirring for 3min after the stirring speed is adjusted to 2000rpm, adding inhibitor starch to stir for 3min, wherein the adding amount of the starch is 794.689g/t of the tailing pulp, adding an activating agent calcium oxide to stir for 3min, the adding amount of the calcium oxide is 849.406g/t of the tailing pulp, adding a collecting agent TD-II to stir for 3min, wherein the adding amount of the TD-II is 793.667g/t of the tailing pulp, performing reverse flotation roughing on the tailing pulp for 3min at 33-35 ℃ to obtain reverse flotation roughing concentrate with the iron grade of 64.56% and separating reverse flotation roughing tailings containing more quartz;
mixing the siderite obtained by the normal flotation to obtain siderite pulp with the weight concentration of 30%, stirring for 3min after the stirring speed is adjusted to 2000rpm, adding inhibitor starch and stirring for 3min, wherein the adding amount of the starch is 48.355g/t of the pulp, then adding dispersant water glass and stirring for 3min, the adding amount of the water glass is 207.648g/t of the pulp, adding collecting agent TD-II and stirring for 3min, the adding amount of the TD-II is 70.244g/t of the pulp, then carrying out siderite roughing on the siderite pulp at 33-35 ℃ to obtain siderite middling, and after 1 scavenging of the middling pulp at 33-35 ℃, returning scavenging concentrate to the reverse flotation roughing feed pulp;
preparing the reverse flotation roughing concentrate into reverse flotation roughing concentrate pulp with the weight concentration of 30%, adding a collecting agent TD-II, stirring for 3min, wherein the addition amount of the TD-II is 396.516g/t, performing primary reverse flotation concentration on the reverse flotation roughing concentrate pulp at 33-35 ℃, and performing concentration for 3min to obtain hematite concentrate and reverse flotation concentrate tailings, and returning the reverse flotation concentrate tailing pulp to the forward flotation tailing pulp for secondary reverse flotation roughing concentration;
and (3) scavenging the reverse flotation rougher tailings for 3 times, specifically, blending the reverse flotation rougher tailings into reverse flotation rougher tailings pulp with the weight concentration of 30%, wherein no flotation agent needs to be additionally added in each scavenging, and the scavenging time is 3min, so that the total tailings are obtained.
The final iron grade is 67.89 percent, and the iron recovery rate is 69.35 percent.
Example 1
A beneficiation method of a mixed magnetic concentrate of east Anshan mountain, which is shown in figure 2.
Adding water into mixed magnetic separation concentrate with the iron grade of 45 percent and the granularity of less than 0.074mm, wherein the mixed magnetic separation concentrate accounts for 95 percent of feed material and the content of carbonate mineral of iron is 7.2 percent, preparing ore pulp solution with the weight concentration of 30 percent, adding the ore pulp into flotation equipment, stirring for 3min after the stirring speed is adjusted to 2000rpm, then adding inhibitor starch, stirring for 3min, adding 401.269g/t of the starch, adding collecting agent TD-II, stirring for 3min, adding 101.342g/t of the TD-II, and then carrying out positive flotation on the ore pulp at the temperature of 33-35 ℃ to obtain siderite concentrate and positive flotation tailings with the iron grade of 41.32 percent; directly discarding the tails of the siderite concentrates;
performing size mixing on the positive flotation tailings to obtain positive flotation tailing pulp with the weight concentration of 30%, adding sodium hydroxide to adjust the pH value of the tailing pulp to 12, stirring for 3min after the stirring speed is adjusted to 2000rpm, adding inhibitor starch to stir for 3min, wherein the adding amount of the starch is 781.452g/t of the tailing pulp, adding an activator calcium oxide to stir for 3min, the adding amount of the calcium oxide is 191.547g/t of the tailing pulp, adding a collecting agent TD-II to stir for 3min, wherein the adding amount of the TD-II is 422.690g/t of the tailing pulp, performing reverse flotation roughing on the tailing pulp at 33-35 ℃ for 3min to obtain reverse flotation roughing concentrate with the iron grade of 60.24% and separating reverse flotation roughing tailings containing more quartz;
carrying out 1-time reverse flotation concentration on the reverse flotation roughing concentrates, blending the reverse flotation roughing concentrates into reverse flotation roughing concentrate pulp with the weight concentration of 30%, adding collecting agents TD-II, stirring for 3min, wherein the addition amount of TD-II is 400.841g/t, carrying out concentration for 3min at 33-35 ℃ to obtain hematite concentrates and reverse flotation concentrate tailings, and returning the reverse flotation concentrate tailings pulp to the direct flotation tailing pulp for carrying out secondary reverse flotation roughing enrichment;
and (3) scavenging the reverse flotation rougher tailings for 3 times, specifically, blending the reverse flotation rougher tailings into reverse flotation rougher tailings pulp with the weight concentration of 30%, wherein no flotation agent needs to be additionally added in each scavenging, and the scavenging time is 3min, so that the total tailings are obtained.
The iron grade of the final concentrate was 65.50%, with an iron recovery of 72.88%.
Example 2
A method for dressing mixed magnetic concentrate ore in Dongshan includes the steps of adding water into mixed magnetic iron ore concentrate with 47% of iron grade, the part with the particle size smaller than 0.074mm accounting for 95% of ore feeding materials and 6.8% of iron carbonate mineral content to prepare ore pulp solution with the weight concentration of 20%, adding the ore pulp into flotation equipment, adjusting the stirring speed to 2000rpm, stirring for 3min, adding inhibitor starch, stirring for 3min, adding 448.126g/t of the ore pulp, adding TD-II serving as a collecting agent, stirring for 3min, adding 149.067g/t of the ore pulp, and performing direct flotation on the ore pulp at 33-35 ℃ to obtain siderite concentrate and direct flotation tailings with the iron grade of 42.64%;
performing size mixing on the positive flotation tailings to obtain positive flotation tailing pulp with the weight concentration of 25%, adding sodium hydroxide to adjust the pH value of the tailing pulp to 11.5, stirring for 3min after the stirring speed is adjusted to 2000rpm, adding inhibitor starch to stir for 3min, wherein the adding amount of the starch is 800.104g/t of the tailing pulp, adding an activating agent calcium oxide to stir for 3min, the adding amount of the calcium oxide is 180.773g/t of the tailing pulp, adding a collecting agent TD-II to stir for 3min, wherein the adding amount of the TD-II is 796.433g/t of the tailing pulp, performing reverse flotation roughing on the tailing pulp for 3min at 33-35 ℃ to obtain reverse flotation roughing concentrate with the iron grade of 60.87% and separating reverse flotation roughing tailings containing more quartz;
carrying out 1-time reverse flotation concentration on the reverse flotation roughing concentrates, blending the reverse flotation roughing concentrates into reverse flotation roughing concentrate pulp with the weight concentration of 20%, adding collecting agents TD-II, stirring for 3min, wherein the addition amount of TD-II is 382.471g/t, carrying out concentration for 3min at 33-35 ℃ to obtain hematite concentrates and reverse flotation concentrate tailings, and returning the reverse flotation concentrate tailings pulp to the direct flotation tailing pulp for carrying out secondary reverse flotation roughing enrichment;
and (3) scavenging the reverse flotation rougher tailings for 3 times, specifically, blending the reverse flotation rougher tailings into reverse flotation rougher tailings pulp with the weight concentration of 30%, wherein no flotation agent needs to be additionally added in each scavenging, and the scavenging time is 3min, so that the total tailings are obtained.
The final iron grade is 65.58 percent, and the iron recovery rate is 71.97 percent.
Example 3
Adding water into mixed magnetic iron ore concentrate with iron grade of 46 percent and granularity of less than 0.074mm, wherein the mixed magnetic iron ore concentrate accounts for 98 percent of ore feeding material and contains 8.5 percent of iron carbonate mineral, preparing ore pulp solution with weight concentration of 25 percent, adding the ore pulp into flotation equipment, adjusting the stirring speed to 2000rpm, stirring for 3min, adding inhibitor starch, stirring for 3min, adding 425.354g/t of the ore pulp, adding TD-II serving as a collecting agent, stirring for 3min, adding 126.342g/t of the ore pulp, and then carrying out positive flotation on the ore pulp at 33-35 ℃ to obtain siderite concentrate and positive flotation tailings with iron grade of 44.02 percent;
performing size mixing on the positive flotation tailings to obtain positive flotation tailing pulp with the weight concentration of 20%, adding sodium hydroxide to adjust the pH value of the tailing pulp to 12, stirring for 3min after the stirring speed is adjusted to 1200rpm, adding inhibitor starch to stir for 3min, wherein the adding amount of the starch is 790.609g/t of the tailing pulp, adding an activator calcium oxide to stir for 3min, the adding amount of the calcium oxide is 202.478g/t of the tailing pulp, adding a collecting agent TD-II to stir for 3min, wherein the adding amount of the TD-II is 613.110g/t of the tailing pulp, performing reverse flotation roughing on the tailing pulp at the temperature of 33-35 ℃ for 3min to obtain reverse flotation roughing concentrate with the iron grade of 61.43% and separating reverse flotation roughing tailings containing more quartz;
carrying out 1-time reverse flotation concentration on the reverse flotation roughing concentrates, blending the reverse flotation roughing concentrates into reverse flotation roughing concentrate pulp with the weight concentration of 25%, adding collecting agents TD-II, stirring for 3min, wherein the addition amount of TD-II is 419.447g/t, carrying out concentration for 3min at 33-35 ℃ to obtain hematite concentrates and reverse flotation concentrate tailings, and returning the reverse flotation concentrate tailings pulp to the direct flotation tailing pulp for carrying out secondary reverse flotation roughing enrichment;
and (3) scavenging the reverse flotation rougher tailings for 3 times, specifically, blending the reverse flotation rougher tailings into reverse flotation rougher tailings pulp with the weight concentration of 30%, wherein no flotation agent needs to be additionally added in each scavenging, and the scavenging time is 3min, so that the total tailings are obtained.
Finally, the iron grade is 66.55 percent, and the iron recovery rate is 75.53 percent.
Claims (7)
1. The method for beneficiation of the Dongshan mixed magnetic concentrate is characterized in that the Dongshan mixed magnetic concentrate is a mixed magnetic iron concentrate obtained by performing low-intensity magnetic separation and high-intensity magnetic separation on Dongshan iron ore, useful minerals in the mixed magnetic iron concentrate are hematite, magnetite and carbonate minerals of iron, main gangue minerals are quartz and chlorite, the TFe grade is 45% -47%, the content of particles dissociated from more than 80% of monomers is more than 90%, the part of the materials with the particle size of less than 0.074mm accounts for 90% -98% of ore feeding materials, and the content of the carbonate minerals of the iron is less than 10%; the method is characterized by comprising the following steps:
1) adding water into the mixed magnetic separation concentrate of the east Anshan mountain to prepare ore pulp with the weight concentration of 20-30%;
2) carrying out primary direct flotation and rough concentration on siderite: adding the ore pulp into flotation equipment, adding inhibitor starch, wherein the adding amount of the starch is 400-450g/t ore pulp, adding collecting agent TD-II, wherein the adding amount of the TD-II is 100-150g/t ore pulp, and then performing direct flotation to obtain siderite middling and direct flotation tailings; wherein the siderite middlings are directly discarded or further processed separately;
3) and (3) reverse flotation roughing: performing size mixing on the positive flotation tailings to obtain positive flotation tailing pulp with the weight concentration of 20-30%, adding sodium hydroxide serving as a pH value regulator to adjust the pH value of the positive flotation tailing pulp to 11.5-12, adding inhibitor starch, wherein the adding amount of the starch is 780-800g/t tailing pulp, adding an activator calcium oxide, the adding amount of the calcium oxide is 180-200g/t tailing pulp, adding a collecting agent TD-II, the adding amount of the TD-II is 400-800g/t tailing pulp, and performing reverse flotation roughing to obtain reverse flotation roughing concentrate and reverse flotation roughing tailings containing more quartz;
4) and (3) carrying out 1 time of reverse flotation concentration on the reverse flotation roughing concentrates to obtain hematite concentrates and reverse flotation concentration tailings, returning the reverse flotation concentration tailings to the positive flotation tailing pulp for secondary enrichment of reverse flotation roughing, and carrying out 2-3 times of scavenging on the reverse flotation roughing tailings to obtain final flotation iron concentrates.
2. The method for concentrating the mixed magnetic concentrate in east anshan as claimed in claim 1, wherein in step 2), the TFe grade of the siderite middlings is more than 40%.
3. The method for concentrating the mixed magnetic concentrate in east Anshan mountain according to claim 1, wherein in step 3), the TFe grade of the roughed concentrate is reverse floated at 60-62%.
4. The method for concentrating the mixed magnetic ore concentrate in east Anshan mountain according to claim 1, wherein in step 4), TFe grade of the final flotation iron ore concentrate is more than 65%, and recovery rate is not less than 72%.
5. The method for concentrating the mixed magnetic concentrate in east Anshan mountain according to claim 1, wherein in the step 4), the reverse flotation roughing concentrate is subjected to 1 time of reverse flotation concentration, specifically, the reverse flotation roughing concentrate is prepared into reverse flotation roughing concentrate pulp with the weight concentration of 20% -30%, collecting agent TD-II is added, and the addition amount of TD-II is 380-.
6. The method for concentrating the mixed magnetic ore in east Anshan according to the claim 1, wherein in the step 4), the reverse flotation rougher tailings are scavenged for 2-3 times, specifically, the reverse flotation rougher tailings are mixed into a reverse flotation rougher tailings pulp with a weight concentration of 20-30%, and no additional flotation agent is required to be added in each scavenging.
7. The method for beneficiation of the magnetic concentrate mixed in east anshan according to the optimization of the flotation reagent system of claim 1, wherein the pulp temperature of the forward flotation, the reverse flotation roughing and the reverse flotation concentration is 33-35 ℃.
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| CN114643132A (en) * | 2022-03-16 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Use method of iron ore concentrate flotation reagent |
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Application publication date: 20210420 |