CN109954591A - The method for floating of sulfur content in a kind of reduction magnetic separation of iron ore concentrate - Google Patents
The method for floating of sulfur content in a kind of reduction magnetic separation of iron ore concentrate Download PDFInfo
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- CN109954591A CN109954591A CN201910328843.7A CN201910328843A CN109954591A CN 109954591 A CN109954591 A CN 109954591A CN 201910328843 A CN201910328843 A CN 201910328843A CN 109954591 A CN109954591 A CN 109954591A
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- concentrate
- iron ore
- magnetic separation
- ore concentrate
- iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention discloses a kind of method for floating of sulfur content in reduction magnetic separation of iron ore concentrate, belong to technical field of mineral processing, comprising the following steps: (1) magnetic separation of iron ore concentrate is sized mixing；(2) roughing operation: being added activator, collecting agent and foaming agent, air flotation in the ore pulp obtained to step (1), the froth pulp that roughing obtains is concentrate 1；(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are scanned, the froth pulp scanned is concentrate 2, concentrate 1 and concentrate 2 form iron concentrate after merging, and product is iron ore concentrate in the slot after the completion of scanning.In iron ore concentrate of the present invention sulfur content can be reduced to 0.3% hereinafter, in iron ore concentrate iron recovery be greater than 98.5%.Meanwhile the cleaning of used medicament is nontoxic, and is readily transported；Toxic gas is not generated, and workshop operating environment is preferable；Floatation process foam is stablized, easily operated；It is smaller on the influence of ore pulp acid-base property, it can effectively slow down equipment corrosion phenomenon.
Description
Technical field
The invention belongs to technical field of mineral processing, in particular to a kind of flotation side for reducing sulfur content in magnetic separation of iron ore concentrate
Method.
Background technique
Sulphur has great harmfulness to steel performance, and intensity is very low at high temperature for the high steel of sulfur-bearing, easy when rolling or forging
" hot-short " phenomenon is generated, meanwhile, sulfur-bearing height can bring many difficulties to blast furnace process, and therefore, sulfur-bearing more lacks better in iron ore concentrate.
The high iron ore concentrate of sulfur-bearing have to pass through processing after could use, generally require the content of sulphur in iron ore concentrate (0.2%~
0.4%) below.The product that iron ore is by being crushed, grinding, magnetic separation, flotation, the techniques such as gravity treatment are selected is iron ore concentrate.Meanwhile
Usually association causes sulfur content in magnetic separation of iron ore concentrate exceeded, is unable to satisfy subsequent production all kinds of metal sulfides in iron ore
Demand.For most iron ore concentrates, the occurrence status of sulphur mainly exists in the form of pyrite and magnetic iron ore, usually
The method for taking flotation realizes the separation of sulphur and iron ore concentrate, to reduce the content of sulphur in iron ore concentrate.
The common collecting agent of flotation of pyrite has xanthate, black powder, diethyldithiocarbamate etc., and in these three medicaments, black powder is to its collecting
Ability is most weak, and can only carry out in weak alkaline medium.Magnetic iron ore is easy to oxidize and argillization, is the difficult floating iron sulfide of comparison
Mineral.The flotation magnetic iron ore in alkalinity and faintly acid ore pulp, Yao Xianyong Cu2+Activation, or activated with a small amount of vulcanized sodium, then with high
Grade xanthate is as collecting agent.Activation easily disappears when copper sulphate is effective activator but larger dosage, so taking segmentation
The method of addition can improve the activation to magnetic iron ore well.The pH value of medium is very big to the activating influence of copper sulphate.
The increase of pH can reduce the activation of copper sulphate, because the active rate of copper sulphate is very slow in the ore pulp of alkalinity, and make it
Activation decline.
Sulfuric acid is most common activator during pyrite flotation, but uses sulfuric acid activated troilite, and the concentrated sulfuric acid is added
Strong chemical reaction can occur in stirred tank, acid mist diffuses in workshop, and concentrated sulfuric acid addition point regional area has very high dense
Pyrite in gradient, with ore pulp, magnetic iron ore generation vigorous reaction are spent, the H of severe toxicity is released2S gas.A large amount of sulfuric acid are added
Afterwards, calcium magnesium minerals can react the corresponding indissoluble sulfate of generation in ore pulp, and this aspect leads to equipment, pipeline serious scale, no
Conducive to plant maintenance, downstream operation is influenced, another aspect part indissoluble sulfate is more difficult to remove after entering blast furnace.Work as iron ore concentrate
In containing fluorite etc. be fluorinated mineral, regional area concentration and slurry temperature are higher after being added due to the concentrated sulfuric acid, fluorite can part it is raw
At hydrofluoric acid (HF).Hydrofluoric acid (HF) irritant smell, corrosivity is strong, more serious to tooth, Bone destruction, such as sucks steam or connects
Touching skin can form the ulcer of more refractory conjunction, and can consumingly corrode metal, glass and siliceous object.The concentrated sulfuric acid has deep-etching
Property, strong and stimulating, can become major hazard source in transport, storage and use process.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide in a kind of reduction magnetic separation of iron ore concentrate sulfur content it is floating
Choosing method.
In order to achieve the above object, the present invention the following technical schemes are provided:
This method for floating for reducing sulfur content in magnetic separation of iron ore concentrate provided by the invention, comprising the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, obtains ore pulp；
(2) roughing operation: addition activator, collecting agent and foaming agent in the ore pulp obtained to step (1), air flotation,
The froth pulp that roughing obtains is concentrate 1；
The activator is one of sodium thiosulfate, ferrous sulfate or the combination between them；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are swept
Choosing, the froth pulp scanned are concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, produce in the slot after the completion of scanning
Product are iron ore concentrate.
Preferably, the collecting agent is xanthate class MA-3.
Preferably, the foaming agent is methyl isobutyl carbinol MIBC.
Preferably, in step (1), it is described size mixing after the concentration of ore pulp be 29~46%.
Preferably, roughing operation: the additive amount of activator is 0~400g/t, and the additive amount of MA-3 is in step (2)
The additive amount of 60~140g/t, MIBC are 20~60g/t.
Preferably, scanning operation in step (3): the additive amount of activator is 0~200g/t, and the additive amount of MA-3 is
The additive amount of 30~70g/t, MIBC are 10~30g/t.
Advantageous effects of the invention are as follows:
The present invention provides a kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate, and sulfur content can reduce in iron ore concentrate
To 0.3% hereinafter, iron recovery is greater than 98.5% in iron ore concentrate.Meanwhile the cleaning of used medicament is nontoxic, and is readily transported；No
Generate toxic gas (H2S、HF、SO2Deng), workshop operating environment is preferable；Floatation process foam is stablized, easily operated；It is right
The influence of ore pulp acid-base property is smaller, can effectively slow down equipment corrosion phenomenon.
Detailed description of the invention
Fig. 1 is the process flow chart of the embodiment of the present invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, rather than whole embodiments, based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Experimental method used in the embodiment of the present invention is conventional method unless otherwise specified, material used, examination
Agent etc., is commercially available unless otherwise specified.
Weak magnetic separation iron concentrate multielement analysis used in embodiment the results are shown in Table 1, as can be seen from Table 1, iron in sample
Grade is 67.81%, sulfur grade 0.67%.
1 sample multielement analysis of table
Embodiment 1
A kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate of the present embodiment, as shown in Figure 1, comprising the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, pulp density 29%；
(2) roughing operation: activator, collecting agent and foaming agent, activator are added in the ore pulp obtained to step (1) is
(sodium thiosulfate, ferrous sulfate), collecting agent MA-3 dosage be 100g/t, foaming agent MIBC dosage be 40g/t, air flotation,
The froth pulp that roughing obtains is concentrate 1；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are swept
Choosing, scans Chinese medicine and halves, and the froth pulp scanned is concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, scan
Product is iron ore concentrate in slot after the completion.
Flotation experimental results are shown in Table 2, by test result it can be seen that acquired flotation effect when sodium thiosulfate is activator
Fruit is best.It is 400g/t in activator sodium thiosulfate dosage, collecting agent MA-3 dosage is 100g/t, and foaming agent MIBC dosage is
Under the conditions of 40g/t, the grade of sulphur is 0.21% in iron ore concentrate, and the rate of recovery of sulphur reaches 69.5% in iron concentrate, iron in iron ore concentrate
Grade reach 67.99%, the rate of recovery of iron reaches 99.0% in iron ore concentrate.
The floatation desulphurization test result of the different activators of table 2
Embodiment 2
A kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate of the present embodiment, comprising the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, pulp density 29%；
(2) roughing operation: it is sulphur that activator, collecting agent and foaming agent, activator are added in the ore pulp obtained to step (1)
Sodium thiosulfate, activator level (0g/t, 100g/t, 200g/t, 300g/t, 400g/t), collecting agent MA-3 dosage are 100g/t,
Foaming agent MIBC dosage is 40g/t, and air flotation, the froth pulp that roughing obtains is concentrate 1；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are swept
Choosing, scans Chinese medicine and halves, and the froth pulp scanned is concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, scan
Product is iron ore concentrate in slot after the completion.
Flotation experimental results are shown in Table 3, by test result it can be seen that when the dosage of activator sodium thiosulfate is 400g/t
When, the grade of sulphur is 0.24% in iron ore concentrate, and the rate of recovery of sulphur is 65.12% in iron concentrate, and the grade of iron reaches in iron ore concentrate
66.88%, the rate of recovery of iron reaches 99.08%, and desulfurization effect achieved is best.
3 activator level floatation desulphurization test result of table
Embodiment 3
A kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate of the present embodiment, comprising the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, pulp density is (29%, 32%, 36%, 39%, 43%, 46%)；
(2) it is thio that activator, collecting agent and foaming agent, activator roughing operation: are added in the ore pulp obtained to step (1)
Sodium sulphate dosage 400g/t, collecting agent MA-3 dosage are 100g/t, and foaming agent MIBC dosage is 40g/t, and air flotation, roughing obtains
The froth pulp arrived is concentrate 1；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are swept
Choosing, scans Chinese medicine and halves, and the froth pulp scanned is concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, scan
Product is iron ore concentrate in slot after the completion.
Flotation experimental results are shown in Table 4, by test result it can be seen that when flotation pulp concentration reaches 36%, in iron ore concentrate
The grade of sulphur is 0.26%, and the rate of recovery of sulphur is 62.6% in iron concentrate, and the grade of iron is 66.93% in iron ore concentrate, iron ore concentrate
The rate of recovery of middle iron reaches 99.1%, and floatation desulphurization effect is best.
Influence of the 4 flotation pulp concentration of table to the grade of sulphur in iron concentrate and the rate of recovery of sulphur
Embodiment 4
A kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate of the present embodiment, comprising the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, pulp density 36%；
(2) it is thio that activator, collecting agent and foaming agent, activator roughing operation: are added in the ore pulp obtained to step (1)
Sodium sulphate dosage 400g/t, collector dosage are 100g/t (MA-3, MA, butyl xanthate, butyl ammonium aerofloat, diethyldithiocarbamate), foaming agent
MIBC dosage is 40g/t, and air flotation, the froth pulp that roughing obtains is concentrate 1；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are swept
Choosing, scans Chinese medicine and halves, and the froth pulp scanned is concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, scan
Product is iron ore concentrate in slot after the completion.
Flotation experimental results are shown in Table 5, by test result it can be seen that when 100g/t MA-3 is added, sulphur in iron ore concentrate
Grade is 0.28%, and the rate of recovery of sulphur is 52.9% in iron concentrate, and the grade of iron reaches 67.99% in iron ore concentrate, in iron ore concentrate
The rate of recovery of iron reaches 99.3%, and desulfurization effect achieved is best.
The different collecting agent floatation desulphurization test results of table 5
Embodiment 5
A kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate of the present embodiment, comprising the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, pulp density 36%；
(2) it is thio that activator, collecting agent and foaming agent, activator roughing operation: are added in the ore pulp obtained to step (1)
Sodium sulphate dosage 400g/t, collecting agent MA-3 dosage are (60g/t, 80g/t, 100g/t, 120g/t, 140g/t), foaming agent
MIBC dosage is 40g/t, and air flotation, the froth pulp that roughing obtains is concentrate 1；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are swept
Choosing, scans Chinese medicine and halves, and the froth pulp scanned is concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, scan
Product is iron ore concentrate in slot after the completion.
Flotation experimental results are shown in Table 6, by test result it can be seen that when the dosage of collecting agent MA-3 is 80g/t, at this time
The grade of iron ore concentrate sulphur is 0.24%, and the rate of recovery of sulphur is 68.0% in iron concentrate, and the grade of iron reaches in iron ore concentrate
67.06%, the rate of recovery of iron reaches 98.9% in iron ore concentrate, and the effect of floatation desulphurization is best at this time.
6 collector dosage floatation desulphurization test result of table
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (6)
1. a kind of method for floating for reducing sulfur content in magnetic separation of iron ore concentrate, which comprises the following steps:
(1) magnetic separation of iron ore concentrate is sized mixing, obtains ore pulp；
(2) activator, collecting agent and foaming agent, air flotation, roughing roughing operation: are added in the ore pulp obtained to step (1)
Obtained froth pulp is concentrate 1；
The activator is one of sodium thiosulfate, ferrous sulfate or the combination between them；
(3) scan operation: product continues to add activator in the slot after the completion of roughing, collecting agent and foaming agent are scanned, and sweeps
Selecting obtained froth pulp is concentrate 2, and concentrate 1 and concentrate 2 form iron concentrate after merging, and product is in the slot after the completion of scanning
Iron ore concentrate.
2. the method for floating according to claim 1 for reducing sulfur content in magnetic separation of iron ore concentrate, which is characterized in that the collecting
Agent is xanthate class MA-3.
3. the method for floating according to claim 1 for reducing sulfur content in magnetic separation of iron ore concentrate, which is characterized in that the blistering
Agent is methyl isobutyl carbinol MIBC.
4. the method for floating described in any one of claim 1 to 3 for reducing sulfur content in magnetic separation of iron ore concentrate, feature exist
In, in step (1), it is described size mixing after ore pulp concentration be 29~46%.
5. the method for floating described in any one of claim 1 to 3 for reducing sulfur content in magnetic separation of iron ore concentrate, feature exist
In in step (2), roughing operation: the additive amount of activator is 0~400g/t, and the additive amount of MA-3 is 60~140g/t, MIBC
Additive amount be 20~60g/t.
6. the method for floating described in any one of claim 1 to 3 for reducing sulfur content in magnetic separation of iron ore concentrate, feature exist
In scanning operation in step (3): the additive amount of activator is 0~200g/t, and the additive amount of MA-3 is 30~70g/t, MIBC
Additive amount be 10~30g/t.
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Cited By (2)
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| CN114226072A (en) * | 2021-12-10 | 2022-03-25 | 临沂会宝岭铁矿有限公司 | Electromagnetic elutriation desulfurization method and system for fine iron powder |
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