CN108246513A - The process of iron direct flotation in a kind of oxide ore tailing - Google Patents
The process of iron direct flotation in a kind of oxide ore tailing Download PDFInfo
- Publication number
- CN108246513A CN108246513A CN201810071521.4A CN201810071521A CN108246513A CN 108246513 A CN108246513 A CN 108246513A CN 201810071521 A CN201810071521 A CN 201810071521A CN 108246513 A CN108246513 A CN 108246513A
- Authority
- CN
- China
- Prior art keywords
- ammonium fluosilicate
- dosage
- iron
- oxide ore
- sulfuric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- 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
-
- 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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- 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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
-
- 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
- B03D2203/04—Non-sulfide ores
Abstract
The invention discloses a kind of processes of iron direct flotation in oxide ore tailing, dilute sulfuric acid and the ammonium fluosilicate of certain proportion mixing are included the use of as inhibitor, iron direct flotation in oxide ore tailing is carried out, recycles and obtain iron ore concentrate, wherein, the weight ratio of the dilute sulfuric acid and ammonium fluosilicate is 1:6‑1:1.The process of iron direct flotation in oxide ore tailing of the present invention is reduced the dosage of ammonium fluosilicate, reduces beneficiation cost, increase safety and Business Economic Benefit and social benefit with ammonium fluosilicate using the dilute sulfuric acid of optimization ratio as depressing agent；The iron concentrate of high quality is obtained, it is cost-effective, improve income.
Description
Technical field
The present invention relates to a kind of technique sides of iron direct flotation in mineral engineering field more particularly to oxide ore tailing
Method.
Background technology
With the continuous rapid development of society, mining deposits are increasingly in short supply, become mesh to the development and reuse of various tailings
One of preceding popular research field.2012-2013, mine research institute of Baogang carry out《Resource comprehensive returns in oxide ore tailing
Skill of knocking off optimisation technique research》, originality proposition preferentially select rare earth-bulk flotation -1 time desulfurization-high intensity magnetic separation-high intensity magnetic mineral
One step direct flotation iron-gravity treatment (strong+one step iron selection tailings of magnetic tail ore deposit) 2 two steps of desulfurization of-gravity concentrate select iron-niobium flotation-
High intensity magnetic separation-mix-froth selects the process program of fluorite.The program can select recovering rare earth in tailing, iron, sulphur, firefly from oxide ore is dilute
6 kinds of stone, niobium, scandium enriched substance products, small-scale test index are in the leading level in the world, realize the synthetical recovery of resource of tailings.
But in oxide ore tailings comprehensive recovery process iron top-up in technique there are inhibitor ammonium fluosilicate dosage it is bigger than normal the defects of.Experiment
Iron direct flotation is tested using ammonium fluosilicate as inhibitor in flow, since preceding step operation is alkaline operation, direct flotation iron
Operation is acid process, is directly sized mixing with ammonium fluosilicate inhibitor, though good result of the test can be obtained, ammonium fluosilicate is used
Measure bigger than normal, reagent cost is higher, and safety is low, is unfavorable for being applied to production line.Therefore, to oxide ore recycle flotation iron process into
There are demands for one-step optimization.
Therefore, those skilled in the art is dedicated to developing a kind of process of iron direct flotation in oxide ore tailing, solution
Ammonium fluosilicate dosage is bigger than normal in certainly above-mentioned existing oxide ore recycling flotation iron process, and reagent cost is higher, and safety is low, waits scarce
It falls into.
Invention content
In view of the drawbacks described above of the prior art, the technical problems to be solved by the invention are oxide ore recycling in the prior art
Ammonium fluosilicate dosage is bigger than normal in flotation iron process, and reagent cost is higher, and safety is low.
To achieve the above object, the present invention provides a kind of process of iron direct flotation in oxide ore tailing, including making
Iron direct flotation in oxide ore tailing is carried out, recycling obtains as inhibitor with ammonium fluosilicate by the use of the dilute sulfuric acid that certain proportion mixes
Iron ore concentrate, wherein, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 1:6-1:1.
Further, in the oxide ore tailing iron direct flotation process, specifically include use weight (gram) than for
1:6-1:1 dilute sulfuric acid is inhibitor with ammonium silicon fluoride mixture, and using the collecting agent of certain dosage, oxide ore tailing is carried out
One roughing, recleaning obtain iron ore concentrate.
Further, the weight of the dilute sulfuric acid and ammonium fluosilicate (gram) is than being 1:5-2:3；
Further, the dosage of the ammonium fluosilicate is：The ammonium fluosilicate dosage of oxide ore tailing per ton is 1~2.5kg；
Further, the collecting agent is SZ-2#；
Further, the SZ-2# includes enuatrol；
Further, the dosage of the SZ-2# is：The SZ-2# dosages of oxide ore tailing per ton are 2~3kg.
In the better embodiment of the present invention, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 1:6；
In another better embodiment of the present invention, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 1:5；
In another better embodiment of the present invention, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 1:4；
In another better embodiment of the present invention, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 1:2；
In another better embodiment of the present invention, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 2:3；
In another better embodiment of the present invention, the weight (gram) of the dilute sulfuric acid and ammonium fluosilicate is than being 1:1；
In the better embodiment of the present invention, the dosage of the ammonium fluosilicate is：The fluosilicic acid of oxide ore tailing per ton
Ammonium dosage is 1kg；
In another better embodiment of the present invention, the dosage of the ammonium fluosilicate is：The fluorine of oxide ore tailing per ton
Ammonium silicate dosage is 1.5kg；
In another better embodiment of the present invention, the dosage of the ammonium fluosilicate is：The fluorine of oxide ore tailing per ton
Ammonium silicate dosage is 1.7kg；
In another better embodiment of the present invention, the dosage of the ammonium fluosilicate is：The fluorine of oxide ore tailing per ton
Ammonium silicate dosage is 2.1kg；
In another better embodiment of the present invention, the dosage of the ammonium fluosilicate is：The fluorine of oxide ore tailing per ton
Ammonium silicate dosage is 2.5kg；
In the better embodiment of the present invention, the dosage of the SZ-2# is：The SZ-2# dosages of oxide ore tailing per ton
For 2kg；
In another better embodiment of the present invention, the dosage of the SZ-2# is：The SZ-2# of oxide ore tailing per ton
Dosage is 2.5kg；
In another better embodiment of the present invention, the dosage of the SZ-2# is：The SZ-2# of oxide ore tailing per ton
Dosage is 2.8kg；
In another better embodiment of the present invention, the dosage of the SZ-2# is：The SZ-2# of oxide ore tailing per ton
Dosage is 3kg；
Using above scheme, the process of iron direct flotation in oxide ore tailing disclosed by the invention has following technology
Effect：
(1) present invention process method combines to replace individually using using dilute sulfuric acid and ammonium fluosilicate according to certain mass ratio
Ammonium fluosilicate is as depressing agent, and optimization best proportion, greatly reduces the dosage of ammonium fluosilicate, reduce ore dressing into
This, increases safety and Business Economic Benefit and social benefit；
(2) present invention process method, can obtain the full Iron grade of concentrate through 1 thick 2 smart technological process is 67.25%, iron recycling
Rate is 28.60%, and tailing full Iron grade is 19.15% to be satisfied with index.Ammonium fluosilicate dosage can reduce 1500g/t simultaneously, drop
Low reagent consumption about 40% has achieved the purpose that save reagent cost, has been effectively utilized resource, improves utilization rate, be conducive to
The sustainable development of society.
In conclusion in oxide ore tailing of the present invention iron direct flotation process, using optimization ratio dilute sulfuric acid with
Ammonium fluosilicate reduces the dosage of ammonium fluosilicate, reduces beneficiation cost, increase safety and enterprise as depressing agent
Industry economic benefit and social benefit；The iron concentrate of high quality is obtained, it is cost-effective, improve income.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
Fig. 1 is the process flow chart of the embodiment of the present invention；
Fig. 2 be embodiment 2 step 1 according to dilute sulfuric acid：Ammonium fluosilicate weight ratio is respectively 3:12、3:14、3:15、3:
16、3:17、3:18 carry out roughing result of the test schematic diagram；
According to dilute sulfuric acid in the step of Fig. 3 is embodiment 2：Ammonium fluosilicate weight ratio is 3:12,6:12,8:12,10:12 into
Row roughing result of the test schematic diagram；
Wherein, the abscissa of Fig. 2 and Fig. 3 is dilute sulfuric acid:The weight ratio of ammonium fluosilicate.
Specific embodiment
Multiple preferred embodiments of the present invention are introduced below with reference to Figure of description, make its technology contents more clear and just
In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits
The embodiment that Yu Wenzhong is mentioned.
In the embodiment of the present invention, collecting agent SZ-2# includes enuatrol.
Embodiment 1 is combined as ammonium fluosilicate-SZ-2# progress iron flotation using direct flotation iron operation active compound agent
Step 1, direct flotation iron operation active compound agent are combined as ammonium fluosilicate-SZ-2#.Wherein, ammonium fluosilicate is inhibitor,
SZ-2# is collecting agent.Fixed collecting agent SZ-2# dosages, inhibitor ammonium fluosilicate dosage be respectively 2900g/t, 3600g/t,
4300g/t, 5000g/t carry out roughing condition test, comprehensive full Iron grade and the rate of recovery, and it is preferable to determine ammonium fluosilicate dosages to be
3600g/t is selects the more excellent dosage of iron roughing；
Step 2, fixed ammonium fluosilicate dosage are 3600g/t, using collecting agent SZ-2# dosages be respectively 2000g/t,
2200g/t, 2400g/t, 2600g/t, 2800g/t carry out roughing condition test, consider full Iron grade, the rate of recovery, determine
It is 3600g/t in ammonium fluosilicate dosage, collecting agent SZ-2# dosages are that 2800g/t is more excellent dosage；
Step 3, using carrying out selecting iron smart under the conditions of the determining ammonium fluosilicates of step 1 and 2, collecting agent SZ-2# optimum amounts
Choosing experiment and stability test, result of the test show that high intensity magnetic mineral can obtain satisfactory iron ore concentrate after 1 thick 2 smart engineer testing；
Further determine that ammonium fluosilicate dosage be 3600g/t, SZ-2# dosage be 2800g/t is best iron floating agent dosage condition.
Embodiment 2 carries out iron flotation using dilute sulfuric acid and ammonium silicon fluoride mixture for inhibitor
Step 1 uses fixed collecting agent SZ-2# dosages that dilute sulfuric acid and ammonium fluosilicate are pressed certain mass ratio for 2800g/t
Example is combined, and direct flotation iron tests are carried out as iron inhibitor is selected；
Specially fixed dilute sulfuric acid dosage, gradually increases ammonium fluosilicate mass ratio, according to dilute sulfuric acid：Ammonium fluosilicate weight
Than being respectively 3:12、3:14、3:15、3:16、3:17、3:18 carry out roughing condition test；
The results are shown in Figure 2, and comprehensive full Iron grade and iron recovery, result of the test are shown, are in dilute sulfuric acid dosage
428.6g/t, ammonium fluosilicate dosage are 2140g/t (i.e. dilute sulfuric acids：Ammonium fluosilicate ratio is 1:5), collecting agent SZ-2# dosages are
Under conditions of 2800g/t, result of the test is preferable；
Step 2 uses fixed collecting agent SZ-2# dosages as 2800g/t, dilute sulfuric acid and ammonium fluosilicate are pressed into certain mass
Ratio is combined, and direct flotation iron tests are carried out as iron inhibitor is selected；
Specially fixed ammonium fluosilicate dosage is 1700g/t, dilute sulfuric acid ratio is gradually increased, according to dilute sulfuric acid：Fluosilicic acid
Ammonium weight ratio is 3:12,6:12,8:12,10:12 carry out roughing condition test；
The results are shown in Figure 3, and comprehensive full Iron grade and the rate of recovery, result of the test are shown, is 1140g/ in dilute sulfuric acid dosage
T, ammonium fluosilicate dosage are 1710g/t (i.e. dilute sulfuric acids：Ammonium fluosilicate ratio is 8:12), collecting agent SZ-2# dosages are 2800g/t
Under conditions of, result of the test is preferable.
Two groups of result of the tests of summary embodiment 2, with embodiment 1 only plus roughing of the ammonium fluosilicate as inhibitor
Under the conditions of result of the test compared, under conditions of rough concentrate yield is essentially identical, add dilute sulfuric acid after, the full iron of rough concentrate
Grade change is little, the basic indifference of effect；Relative to the ammonium fluosilicate dosage 3600g/t of embodiment 1, the fluorine silicon of embodiment 2
Sour ammonium dosage is 1710g/t, and ammonium fluosilicate dosage reduces 52%, reagent cost is greatly saved.
By described above as it can be seen that using the weight of dilute sulfuric acid and ammonium fluosilicate (gram) ratio as 1:6-1:1 mixing dilute sulfuric acid
With ammonium fluosilicate as inhibitor, iron direct flotation in oxide ore tailing is carried out, recycling obtains qualified iron ore concentrate, reduces fluorine silicon
The dosage of sour ammonium, reduces beneficiation cost, increases safety and Business Economic Benefit and social benefit；
Other technologies scheme of the present invention also has similar using effect.
The preferred embodiment of the present invention described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. the process of iron direct flotation in a kind of oxide ore tailing, which is characterized in that include the use of the dilute of certain proportion mixing
Sulfuric acid and ammonium fluosilicate carry out iron direct flotation in oxide ore tailing, recycle and obtain iron ore concentrate as inhibitor, wherein, it is described dilute
The weight ratio of sulfuric acid and ammonium fluosilicate is 1:6-1:1.
2. process as described in claim 1, which is characterized in that specifically include and use weight (gram) ratio as 1:6-1:1 it is dilute
Sulfuric acid is inhibitor with ammonium silicon fluoride mixture, and using the collecting agent of certain dosage, one roughing, two are carried out to oxide ore tailing
It is secondary selected to obtain iron ore concentrate.
3. process as claimed in claim 1 or 2, which is characterized in that the weight ratio of the dilute sulfuric acid and ammonium fluosilicate is 1:
5-2:3。
4. process as claimed in claim 1 or 2, which is characterized in that the dosage of the ammonium fluosilicate is：Oxide ore tail per ton
The ammonium fluosilicate dosage of ore deposit is 1~2.5kg.
5. process as claimed in claim 1 or 2, which is characterized in that the collecting agent is SZ-2#；The SZ-2# includes oil
Sour sodium；
The dosage of the SZ-2# is：The SZ-2# dosages of oxide ore tailing per ton are 2~3kg.
6. process as claimed in claim 3, which is characterized in that the weight ratio of the dilute sulfuric acid and ammonium fluosilicate is 1:5.
7. process as claimed in claim 4, which is characterized in that the dosage of the ammonium fluosilicate is：Oxide ore tailing per ton
Ammonium fluosilicate dosage be 1.7kg.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810071521.4A CN108246513A (en) | 2018-01-25 | 2018-01-25 | The process of iron direct flotation in a kind of oxide ore tailing |
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| CN201810071521.4A CN108246513A (en) | 2018-01-25 | 2018-01-25 | The process of iron direct flotation in a kind of oxide ore tailing |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2141384C1 (en) * | 1998-11-02 | 1999-11-20 | ЗАО "Механобр Инжиниринг Автоматик" | Method of flotation of nonferrous ores |
| CN1343531A (en) * | 2000-09-21 | 2002-04-10 | 冶金工业部马鞍山矿山研究院 | Process for preparing floatation catcher of iron ore |
| CN102319614A (en) * | 2011-06-20 | 2012-01-18 | 米建国 | Benefication method for recovering ilmenite from iron tailings in Shandong area |
| CN103263977A (en) * | 2013-05-15 | 2013-08-28 | 包钢集团矿山研究院（有限责任公司） | Process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings |
| CN106755998A (en) * | 2016-12-15 | 2017-05-31 | 沈阳有色金属研究院 | A kind of beneficiation method of ilmenite |
-
2018
- 2018-01-25 CN CN201810071521.4A patent/CN108246513A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2141384C1 (en) * | 1998-11-02 | 1999-11-20 | ЗАО "Механобр Инжиниринг Автоматик" | Method of flotation of nonferrous ores |
| CN1343531A (en) * | 2000-09-21 | 2002-04-10 | 冶金工业部马鞍山矿山研究院 | Process for preparing floatation catcher of iron ore |
| CN102319614A (en) * | 2011-06-20 | 2012-01-18 | 米建国 | Benefication method for recovering ilmenite from iron tailings in Shandong area |
| CN103263977A (en) * | 2013-05-15 | 2013-08-28 | 包钢集团矿山研究院（有限责任公司） | Process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings |
| CN106755998A (en) * | 2016-12-15 | 2017-05-31 | 沈阳有色金属研究院 | A kind of beneficiation method of ilmenite |
Non-Patent Citations (3)
| Title |
|---|
| 李宏静等: "白云鄂博氧化矿尾矿综合回收铁正浮药剂优化研究", 《现代矿业》 * |
| 梅光军: "氟硅酸铵在赤铁矿与含铁硅酸盐浮选分离中的选择性抑制作用", 《矿业工程》 * |
| 梅光军: "氟硅酸铵在赤铁矿与霓石分离中的作用机理", 《金属矿山》 * |
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