CN108031546A - A kind of method of red mud recycling iron - Google Patents
A kind of method of red mud recycling iron Download PDFInfo
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- CN108031546A CN108031546A CN201711447513.7A CN201711447513A CN108031546A CN 108031546 A CN108031546 A CN 108031546A CN 201711447513 A CN201711447513 A CN 201711447513A CN 108031546 A CN108031546 A CN 108031546A
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- ore
- red mud
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
Abstract
The present invention provides a kind of method of red mud recycling iron.The present invention carries out red mud to anticipate enrichment using shaking table desliming, vibrating screen classification, the technique of strong magnetic enrichment, then recycles iron mineral using the technique of stage grinding magnetic separation dusting cover.Whole technological process treating capacity of the invention is big, and iron concentrate grade is high, the rate of recovery is high, and energy consumption is low, cost is low, can recycle the iron in red mud, improve resource utilization, red mud occupation of land is reduced at the same time, reduces environmental pollution, there is preferable Social benefit and economic benefit.
Description
Technical field
The present invention relates to alumina laterite recycling field, is specifically a kind of method of red mud recycling iron.
Background technology
Red mud is to extract the bronzing pureed solid industrial waste produced after aluminium oxide in aluminium industry processed from bauxite.One
As it is average often produce 1 ton of aluminium oxide, incidentally produce 1.0~2.0 tons of red muds.
China is used as the 4th big alumina producing state of the world, and the red mud discharged every year is up to millions of tons.Substantial amounts of red mud is not
The sufficiently effective utilization of energy, can only rely on the stockyard of large area to stack, the accumulation not only landed property resource, but also red mud of red mud
In alkali, sodium, aluminium, fluoride and rare metal etc., it will as percolate enters underground water, certain wound is caused to human body
Evil.In addition, the high alkalinity of red mud also can contaminant water, people and animals and plants are produced with certain harm.The generation of red mud is to the mankind
Production, life cause many influences directly or indirectly, it is real so reduce yield and the harm of red mud to greatest extent
Now by all kinds of means, the recycling of big quantity it is extremely urgent.Therefore how red mud to be turned waste into wealth, waste utilization, change is harmful to have
Profit, reduces the concern that all circles' researcher has been caused to naturally pollution.
The prior art mainly has three kinds from the method for recovering iron from red mud concentrate：First, pass through magnetic method, patent
CN101648159A discloses what magnetomechanical recycling ferromagnetism iron and high gradient magnetic separator recycling weak magnetism in a kind of utilization were combined
Technique from the method for recovering iron from red mud concentrate, the method there are iron recovery it is low the problem of.Second, direct-reduction roasting, patent
CN103074456A discloses one kind, and by additives such as drying, ball processed, addition coke, the directly progress melting in blast furnace obtains iron
Method, there are the problem of high energy consumption for the method.Third, magnetic separation and roast joint, patent CN102626670A disclose a kind of revolution
The kiln magnetizing roast processing red mud method for preparing Iron concentrate, there are the energy to disappear to red mud of the iron content below 30% for this method
The problem of big is consumed, and microfine entrainment can cause iron concentrate grade relatively low during magnetic separation after roasting.
The content of the invention
It is an object of the invention to provide a kind of method of red mud recycling iron, to solve to ask present in above-mentioned background technology
Topic.
The technical proposal of the invention is realized in this way：
A kind of method of red mud recycling iron, comprises the following steps：
（1）Red mud is sent into desliming shaking table and carries out desliming, obtains shaking table tailing and table concentrate；
（2）By step（1）Table concentrate is sent into vibrating screen and is classified, and obtains -0.074mm under the upper+0.074mm ore pulps of sieve and sieve
Ore pulp；
（3）By step（2）+ 0.074mm ore pulps are sent into magnetic separator one and are sorted on sieve, obtain magnetic tailing and magnetic concentrate；
（4）By step（3）Magnetic concentrate is sent into ball mill and carries out ore grinding；
（5）By step（4）Ball mill ore discharging is sent into hydrocyclone and is classified, and hydrocyclone underflow returns to ball mill, water
The overflow of power cyclone is sent into magnetic separator two and is sorted；
（6）By step（5）Two concentrate of magnetic separator is sent into tower grinding machine and carries out ore grinding；
（7）By step（6）Tower grinding machine ore discharge is sent into magnetic separator three and is sorted, and obtains magnetic tailing and magnetic concentrate；
（8）By step（7）Three concentrate of magnetic separator is sent into dusting cover and is classified, obtain under the upper+0.045mm Tailings Slurries of sieve and sieve-
0.045mm concentrate slurries；
（9）By step（1）Shaking table tailing, step（2）- 0.074mm ore pulps, step under sieve（3）One tailing of magnetic separator, step（5）
Two tailing of magnetic separator is sent into thickener and carries out thickening together, and thickener underflow is sent to stockyard stockpiling, overflow returning alumina
Factory recycles；
（10）By step（7）Three tailing of magnetic separator and step（8）+ 0.045mm ore pulps are sent into filter one and were carried out together on sieve
Filter dehydration, is used for cement producting material by one underflow of filter, one overflow returning alumina factory of filter is recycled；
（11）By step（8）- 0.045mm ore pulps are sent into filter two and carry out filtering means dehydration under sieve, obtain underflow iron extract mine producation,
Two overflow returning alumina factory of filter is recycled.
Preferably, the step（1）Desliming shaking table feed ore concentration is 20% ~ 25%.
Preferably, the step（3）One magnetic field intensity of magnetic separator is 1.3T ~ 1.5T.
Preferably, the step（4）Ball mill ore milling concentration is 70% ~ 75%.
Preferably, the step（5）Waterpower revolves sharp weapon overflow -0.074mm75% ~ 85%.
Preferably, the step（5）Two magnetic field intensity of magnetic separator is 1.0T ~ 1.2T.
Preferably, the step（6）Tower grinding machine ore milling concentration is 65% ~ 70%, and ore discharge fineness is -0.045mm80% ~ 85%.
Preferably, the step（7）Three magnetic field intensity of magnetic separator is 0.8T ~ 1.0T.
Beneficial effects of the present invention are：
The present invention carries out red mud to anticipate enrichment using shaking table desliming, vibrating screen classification, the technique of strong magnetic enrichment, then adopts
Iron mineral is recycled with the technique of stage grinding-magnetic separation-dusting cover, whole technological process treating capacity is big, and iron concentrate grade is high, the rate of recovery
Height, energy consumption is low, and cost is low, can recycle the iron in red mud, improve resource utilization, while reduces red mud occupation of land, subtracts
Few environmental pollution, has preferable Social benefit and economic benefit.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it is therefore apparent that drawings in the following description are only this hair
Some bright embodiments, for those of ordinary skill in the art, without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the method flow schematic diagram that a kind of red mud of the present invention recycles iron.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described ground embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1
The method for present embodiments providing red mud recycling iron, comprises the following steps：
（1）Red mud is sent into desliming shaking table and carries out desliming, shaking table feed ore concentration is 20%, obtains shaking table tailing and table concentrate；
（2）By step（1）Table concentrate is sent into vibrating screen and is classified, and obtains -0.074mm under the upper+0.074mm ore pulps of sieve and sieve
Ore pulp；
（3）By step（2）+ 0.074mm ore pulps are sent into magnetic field intensity and are sorted for 1.3T magnetic separators one on sieve, obtain magnetic separation tail
Ore deposit and magnetic concentrate；
（4）By step（3）Magnetic concentrate is sent into ball mill and carries out ore grinding, ore milling concentration 70%.；
（5）By step（4）Ball mill ore discharging is sent into hydrocyclone and is classified, and hydrocyclone underflow returns to ball mill, water
Power cyclone -0.074mm75% overflows are sent into magnetic field intensity and are sorted for 1.0T magnetic separators two；
（6）By step（5）Two concentrate of magnetic separator is sent into tower grinding machine and carries out ore grinding, ore milling concentration 65%, ore discharge fineness for-
0.045mm80%；
（7）By step（6）Tower grinding machine ore discharge is sent into magnetic field intensity and is sorted for 0.8T magnetic separators three, obtains magnetic tailing and magnetic
Concentrate selection；
（8）By step（7）Three concentrate of magnetic separator is sent into dusting cover and is classified, obtain under the upper+0.045mm Tailings Slurries of sieve and sieve-
0.045mm concentrate slurries；
（9）By step（1）Shaking table tailing, step（2）- 0.074mm ore pulps, step under sieve（3）One tailing of magnetic separator, step（5）
Two tailing of magnetic separator is sent into thickener and carries out thickening together, and thickener underflow is sent to stockyard stockpiling, overflow returning alumina
Factory recycles；
（10）By step（7）Three tailing of magnetic separator and step（8）+ 0.045mm ore pulps are sent into filter one and were carried out together on sieve
Filter dehydration, is used for cement producting material by one underflow of filter, one overflow returning alumina factory of filter is recycled；
（11）By step（8）- 0.045mm ore pulps are sent into filter two and carry out filtering means dehydration under sieve, obtain underflow iron extract mine producation,
Two overflow returning alumina factory of filter is recycled.
The present embodiment can recycle to obtain Iron grade 58.05%, the rate of recovery 44.21%.Iron in red mud can be recycled profit
With, resource utilization is improved, while red mud occupation of land is reduced, reduce environmental pollution.
Embodiment 2
The method for present embodiments providing red mud recycling iron, comprises the following steps：
（1）Red mud is sent into desliming shaking table and carries out desliming, shaking table feed ore concentration is 22%, obtains shaking table tailing and table concentrate；
（2）By step（1）Table concentrate is sent into vibrating screen and is classified, and obtains -0.074mm under the upper+0.074mm ore pulps of sieve and sieve
Ore pulp；
（3）By step（2）+ 0.074mm ore pulps are sent into magnetic field intensity and are sorted for 1.4T magnetic separators one on sieve, obtain magnetic separation tail
Ore deposit and magnetic concentrate；
（4）By step（3）Magnetic concentrate is sent into ball mill and carries out ore grinding, ore milling concentration 73%.；
（5）By step（4）Ball mill ore discharging is sent into hydrocyclone and is classified, and hydrocyclone underflow returns to ball mill, water
Power cyclone -0.074mm80% overflows are sent into magnetic field intensity and are sorted for 1.1T magnetic separators two；
（6）By step（5）Two concentrate of magnetic separator is sent into tower grinding machine and carries out ore grinding, ore milling concentration 68%, ore discharge fineness for-
0.045mm83%；
（7）By step（6）Tower grinding machine ore discharge is sent into magnetic field intensity and is sorted for 0.9T magnetic separators three, obtains magnetic tailing and magnetic
Concentrate selection；
（8）By step（7）Three concentrate of magnetic separator is sent into dusting cover and is classified, obtain under the upper+0.045mm Tailings Slurries of sieve and sieve-
0.045mm concentrate slurries；
（9）By step（1）Shaking table tailing, step（2）- 0.074mm ore pulps, step under sieve（3）One tailing of magnetic separator, step（5）
Two tailing of magnetic separator is sent into thickener and carries out thickening together, and thickener underflow is sent to stockyard stockpiling, overflow returning alumina
Factory recycles；
（10）By step（7）Three tailing of magnetic separator and step（8）+ 0.045mm ore pulps are sent into filter one and were carried out together on sieve
Filter dehydration, is used for cement producting material by one underflow of filter, one overflow returning alumina factory of filter is recycled；
（11）By step（8）- 0.045mm ore pulps are sent into filter two and carry out filtering means dehydration under sieve, obtain underflow iron extract mine producation,
Two overflow returning alumina factory of filter is recycled.
The present embodiment can recycle to obtain Iron grade 59.11%, the rate of recovery 45.18%.Iron in red mud can be recycled profit
With, resource utilization is improved, while red mud occupation of land is reduced, reduce environmental pollution.
Embodiment 3
The method for present embodiments providing red mud recycling iron, comprises the following steps：
（1）Red mud is sent into desliming shaking table and carries out desliming, shaking table feed ore concentration is 25%, obtains shaking table tailing and table concentrate；
（2）By step（1）Table concentrate is sent into vibrating screen and is classified, and obtains -0.074mm under the upper+0.074mm ore pulps of sieve and sieve
Ore pulp；
（3）By step（2）+ 0.074mm ore pulps are sent into magnetic field intensity and are sorted for 1.5T magnetic separators one on sieve, obtain magnetic separation tail
Ore deposit and magnetic concentrate；
（4）By step（3）Magnetic concentrate is sent into ball mill and carries out ore grinding, ore milling concentration 75%.；
（5）By step（4）Ball mill ore discharging is sent into hydrocyclone and is classified, and hydrocyclone underflow returns to ball mill, water
Power cyclone -0.074mm85% overflows are sent into magnetic field intensity and are sorted for 1.2T magnetic separators two；
（6）By step（5）Two concentrate of magnetic separator is sent into tower grinding machine and carries out ore grinding, ore milling concentration 70%, ore discharge fineness for-
0.045mm85%；
（7）By step（6）Tower grinding machine ore discharge is sent into magnetic field intensity and is sorted for 1.0T magnetic separators three, obtains magnetic tailing and magnetic
Concentrate selection；
（8）By step（7）Three concentrate of magnetic separator is sent into dusting cover and is classified, obtain under the upper+0.045mm Tailings Slurries of sieve and sieve-
0.045mm concentrate slurries；
（9）By step（1）Shaking table tailing, step（2）- 0.074mm ore pulps, step under sieve（3）One tailing of magnetic separator, step（5）
Two tailing of magnetic separator is sent into thickener and carries out thickening together, and thickener underflow is sent to stockyard stockpiling, overflow returning alumina
Factory recycles；
（10）By step（7）Three tailing of magnetic separator and step（8）+ 0.045mm ore pulps are sent into filter one and were carried out together on sieve
Filter dehydration, is used for cement producting material by one underflow of filter, one overflow returning alumina factory of filter is recycled；
（11）By step（8）- 0.045mm ore pulps are sent into filter two and carry out filtering means dehydration under sieve, obtain underflow iron extract mine producation,
Two overflow returning alumina factory of filter is recycled.
The present embodiment can recycle to obtain Iron grade 60.07%, the rate of recovery 46.01%.Iron in red mud can be recycled profit
With, resource utilization is improved, while red mud occupation of land is reduced, reduce environmental pollution.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of method of red mud recycling iron, comprises the following steps：
（1）Red mud is sent into desliming shaking table and carries out desliming, obtains shaking table tailing and table concentrate；
（2）By step（1）Table concentrate is sent into vibrating screen and is classified, and obtains -0.074mm under the upper+0.074mm ore pulps of sieve and sieve
Ore pulp；
（3）By step（2）+ 0.074mm ore pulps are sent into magnetic separator one and are sorted on sieve, obtain magnetic tailing and magnetic concentrate；
（4）By step（3）Magnetic concentrate is sent into ball mill and carries out ore grinding；
（5）By step（4）Ball mill ore discharging is sent into hydrocyclone and is classified, and hydrocyclone underflow returns to ball mill, water
The overflow of power cyclone is sent into magnetic separator two and is sorted；
（6）By step（5）Two concentrate of magnetic separator is sent into tower grinding machine and carries out ore grinding；
（7）By step（6）Tower grinding machine ore discharge is sent into magnetic separator three and is sorted, and obtains magnetic tailing and magnetic concentrate；
（8）By step（7）Three concentrate of magnetic separator is sent into dusting cover and is classified, obtain under the upper+0.045mm Tailings Slurries of sieve and sieve-
0.045mm concentrate slurries；
（9）By step（1）Shaking table tailing, step（2）- 0.074mm ore pulps, step under sieve（3）One tailing of magnetic separator, step（5）
Two tailing of magnetic separator is sent into thickener and carries out thickening together, and thickener underflow is sent to stockyard stockpiling, overflow returning alumina
Factory recycles；
（10）By step（7）Three tailing of magnetic separator and step（8）+ 0.045mm ore pulps are sent into filter one and were carried out together on sieve
Filter dehydration, is used for cement producting material by one underflow of filter, one overflow returning alumina factory of filter is recycled；
（11）By step（8）- 0.045mm ore pulps are sent into filter two and carry out filtering means dehydration under sieve, obtain underflow iron extract mine producation,
Two overflow returning alumina factory of filter is recycled.
A kind of 2. method of red mud recycling iron according to claim 1, it is characterised in that the step（1）Desliming shaking table
Feed ore concentration is 20% ~ 25%.
A kind of 3. method of red mud recycling iron according to claim 1, it is characterised in that the step（3）Magnetic separator one
Magnetic field intensity is 1.3T ~ 1.5T.
A kind of 4. method of red mud recycling iron according to claim 1, it is characterised in that the step（4）Ball mill is ground
Ore deposit concentration is 70% ~ 75%.
A kind of 5. method of red mud recycling iron according to claim 1, it is characterised in that the step（5）Waterpower rotation profit
Device overflow -0.074mm75% ~ 85%.
A kind of 6. method of red mud recycling iron according to claim 1, it is characterised in that the step（5）Magnetic separator two
Magnetic field intensity is 1.0T ~ 1.2T.
A kind of 7. method of red mud recycling iron according to claim 1, it is characterised in that the step（6）Tower grinding machine is ground
Ore deposit concentration is 65% ~ 70%, and ore discharge fineness is -0.045mm80% ~ 85%.
A kind of 8. method of red mud recycling iron according to claim 1, it is characterised in that the step（7）Magnetic separator three
Magnetic field intensity is 0.8T ~ 1.0T.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439023A (en) * | 2018-11-07 | 2019-03-08 | 张勇 | A technique for functional filler production is carried out using red mud |
| US10851007B1 (en) | 2019-08-06 | 2020-12-01 | Red Mud Enterprises Llc | System for processing Red Mud and method of processing Red Mud |
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